IDEMPIERE-144 Performance: Remove the use of zk event thread. This will break things but it is a necessary step to improve the performance and scalability of the zk client. This is also the first step require to implement clustering support.

org.adempiere.base/src/org/adempiere/util/IProcessUI.java

@@ -76,7 +76,7 @@ public interface IProcessUI {
 	 * @param message
 	 * @param callback
 	 */
-	public void ask(String message, Callback<String> callback);
+	public void ask(String message, Callback<Boolean> callback);
 	
 	/**
 	 * add to list of file available for download after process end 

org.adempiere.base/src/org/adempiere/util/ProcessUtil.java

@@ -346,12 +346,7 @@ public final class ProcessUtil {
 
 	public static MWFProcess startWorkFlow(Properties ctx, ProcessInfo pi, int AD_Workflow_ID) {
 		MWorkflow wf = MWorkflow.get (ctx, AD_Workflow_ID);
-		MWFProcess wfProcess = null;
+		MWFProcess wfProcess = wf.start(pi, pi.getTransactionName());
-		if (pi.isBatch())
-			wfProcess = wf.start(pi, pi.getTransactionName());		//	may return null
-		else {
-			wfProcess = wf.startWait(pi);	//	may return null
-		}
 		log.fine(pi.toString());
 		return wfProcess;
 	}

org.adempiere.base/src/org/compiere/wf/MWorkflow.java

@@ -710,6 +710,16 @@ public class MWorkflow extends X_AD_Workflow
 			if (localTrx != null)
 				localTrx.close();
 		}
+		
+		if (retValue != null)
+		{
+			String summary = retValue.getProcessMsg();
+			StateEngine state = retValue.getState();
+			if (summary == null || summary.trim().length() == 0)
+				summary = state.toString();
+			pi.setSummary(summary, state.isTerminated() || state.isAborted());
+		}
+		
 		return retValue;
 	}	//	MWFProcess
 

org.adempiere.ui.swing/src/org/compiere/apps/APanel.java

@@ -2972,10 +2972,10 @@ public final class APanel extends CPanel
 	}	//	updateToolBarAndMenuWithRestriction
 
 	@Override
-	public void ask(String message, Callback<String> callback) {
+	public void ask(String message, Callback<Boolean> callback) {
 		boolean  b = ADialog.ask(m_curWindowNo, this, message);
 		if (callback != null) {
-			callback.onCallback(b ? "OK" : "CANCEL");
+			callback.onCallback(b);
 		}
 	}
 

org.adempiere.ui.swing/src/org/compiere/apps/ProcessDialog.java

@@ -526,10 +526,10 @@ public class ProcessDialog extends CFrame
 	}
 
 	@Override
-	public void ask(String message, Callback<String> callback) {
+	public void ask(String message, Callback<Boolean> callback) {
 		boolean  b = ADialog.ask(m_WindowNo, this, message);
 		if (callback != null) {
-			callback.onCallback(b ? "OK" : "CANCEL");
+			callback.onCallback(b);
 		}
 	}
 

org.adempiere.ui.swing/src/org/compiere/apps/form/VGenPanel.java

@@ -389,10 +389,10 @@ public class VGenPanel extends CPanel implements ActionListener, ChangeListener,
 	}
 
 	@Override
-	public void ask(String message, Callback<String> callback) {
+	public void ask(String message, Callback<Boolean> callback) {
 		boolean  b = ADialog.ask(m_WindowNo, this, message);
 		if (callback != null) {
-			callback.onCallback(b ? "OK" : "CANCEL");
+			callback.onCallback(b);
 		}
 	}
 

org.adempiere.ui.swing/src/org/compiere/apps/form/VPaySelect.java

@@ -448,10 +448,10 @@ public class VPaySelect extends PaySelect implements FormPanel, ActionListener,
 	}
 
 	@Override
-	public void ask(String message, Callback<String> callback) {
+	public void ask(String message, Callback<Boolean> callback) {
 		boolean  b = ADialog.ask(m_WindowNo, null, message);
 		if (callback != null) {
-			callback.onCallback(b ? "OK" : "CANCEL");
+			callback.onCallback(b);
 		}
 	}
 

org.adempiere.ui.swing/src/org/eevolution/form/VInOutInvoiceGen.java

@@ -905,10 +905,10 @@ public class VInOutInvoiceGen extends CPanel
 	}
 
 	@Override
-	public void ask(String message, Callback<String> callback) {
+	public void ask(String message, Callback<Boolean> callback) {
 		boolean  b = ADialog.ask(m_WindowNo, this, message);
 		if (callback != null) {
-			callback.onCallback(b ? "OK" : "CANCEL");
+			callback.onCallback(b);
 		}
 	}
 

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/AdempiereWebUI.java

@@ -102,6 +102,8 @@ public class AdempiereWebUI extends Window implements EventListener<Event>, IWeb
 	
 	private static final String CLIENT_INFO = "client.info";
 	
+	private static boolean eventThreadEnabled = false;
+
     public AdempiereWebUI()
     {
     	this.addEventListener(Events.ON_CLIENT_INFO, this);
@@ -133,6 +135,8 @@ public class AdempiereWebUI extends Window implements EventListener<Event>, IWeb
         Executions.getCurrent().getDesktop().addListener(new DrillCommand());
         Executions.getCurrent().getDesktop().addListener(new TokenCommand());
         Executions.getCurrent().getDesktop().addListener(new ZoomCommand());
+        
+        eventThreadEnabled = Executions.getCurrent().getDesktop().getWebApp().getConfiguration().isEventThreadEnabled();
     }
 
     public void onOk()
@@ -393,4 +397,8 @@ public class AdempiereWebUI extends Window implements EventListener<Event>, IWeb
 	public UserPreference getUserPreference() {
 		return userPreference;
 	}
+	
+	public static boolean isEventThreadEnabled() {
+		return eventThreadEnabled;
+	}
 }

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/ValuePreference.java

@@ -67,9 +67,9 @@ public class ValuePreference extends Window implements EventListener
 	 *  @param aValue	value
 	 *  @return ValuePreference or null
 	 */
-	public static ValuePreference start (GridField mField, Object aValue)
+	public static void start (GridField mField, Object aValue)
 	{
-		return start (mField, aValue, null);
+		start (mField, aValue, null);
 	}   //  start
 
 	/**
@@ -79,12 +79,12 @@ public class ValuePreference extends Window implements EventListener
 	 *  @param aDisplayValue	display value
 	 *  @return ValuePreference or null
 	 */
-	public static ValuePreference start (GridField mField, Object aValue, String aDisplayValue)
+	public static void start (GridField mField, Object aValue, String aDisplayValue)
 	{
 		if (!mField.isEditable(false))
 		{
 			log.info("Field not editable (R/O)");
-			return null;
+			return;
 		}
 		
 		//  Set Value/DisplayValue
@@ -116,7 +116,6 @@ public class ValuePreference extends Window implements EventListener
 			AD_Client_ID, AD_Org_ID, AD_User_ID, AD_Window_ID,
 			Attribute, DisplayAttribute, Value, DisplayValue,
 			displayType, AD_Reference_ID);
-		return vp;
 	}   //  create
 
 	/**

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/acct/WAcctViewer.java

@@ -24,6 +24,7 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.logging.Level;
 
+import org.adempiere.util.Callback;
 import org.adempiere.webui.apps.AEnv;
 import org.adempiere.webui.component.Button;
 import org.adempiere.webui.component.Checkbox;
@@ -1295,8 +1296,14 @@ public class WAcctViewer extends Window implements EventListener
 	private void actionRePost()
 	{
 		if (m_data.documentQuery
-			&& m_data.AD_Table_ID != 0 && m_data.Record_ID != 0
+			&& m_data.AD_Table_ID != 0 && m_data.Record_ID != 0)
-			&& FDialog.ask(m_data.WindowNo, this, "PostImmediate?"))
+		{
+			FDialog.ask(m_data.WindowNo, this, "PostImmediate?", new Callback<Boolean>() {
+				
+				@Override
+				public void onCallback(Boolean result) 
+				{
+					if (result)
 					{
 						//setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
 						boolean force = forcePost.isChecked();
@@ -1304,10 +1311,13 @@ public class WAcctViewer extends Window implements EventListener
 							m_data.AD_Table_ID, m_data.Record_ID, force);
 						//setCursor(Cursor.getDefaultCursor());
 						if (error != null)
-				FDialog.error(0, this, "PostingError-N", error);
+							FDialog.error(0, WAcctViewer.this, "PostingError-N", error);
 
 						actionQuery();
 					}
+				}
+			});			
+		}
 	} // actionRePost
 
 	// Elaine 2009/07/29

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/AEnv.java

@@ -92,15 +92,6 @@ public final class AEnv
 		SessionManager.getAppDesktop().showWindow(window, "center");
 	}   //  showCenterScreen
 
-	/**
-	 *	Position window in center of the screen
-	 * 	@param window Window to position
-	 */
-	public static void positionCenterScreen(Window window)
-	{
-		showCenterScreen(window);
-	}	//	positionCenterScreen
-
 	/**
 	 *  Show in the center of the screen.
 	 *  (pack, set location and set visibility)

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/ProcessDialog.java

@@ -462,17 +462,17 @@ public class ProcessDialog extends Window implements EventListener<Event>, IProc
 	public void onAfterProcess() 
 	{
 		//
-		afterProcessTask();
+		if (!afterProcessTask()) {
-
 			// If the process is a silent one and no errors occured, close the dialog
 			if(m_ShowHelp != null && m_ShowHelp.equals("S"))
 				this.dispose();	
 		}
+	}
 	
 	/**************************************************************************
 	 *	Optional Processing Task
 	 */
-	private void afterProcessTask()
+	private boolean afterProcessTask()
 	{
 		//  something to do?
 		if (m_ids != null && m_ids.length > 0)
@@ -480,11 +480,21 @@ public class ProcessDialog extends Window implements EventListener<Event>, IProc
 			log.config("");
 			//	Print invoices
 			if (m_AD_Process_ID == PROCESS_C_INVOICE_GENERATE)
+			{
 				printInvoices();
-			else if (m_AD_Process_ID == PROCESS_M_INOUT_GENERATE)
+				return true;
-				printShipments();
 			}
-
+			else if (m_AD_Process_ID == PROCESS_M_INOUT_GENERATE)
+			{
+				printShipments();
+				return true;
+			}
+			else
+			{
+				return false;
+			}
+		}
+		return false;
 	}	//	afterProcessTask
 	
 	/**************************************************************************
@@ -494,13 +504,17 @@ public class ProcessDialog extends Window implements EventListener<Event>, IProc
 	{		
 		if (m_ids == null)
 			return;
-		if (!FDialog.ask(m_WindowNo, this, "PrintShipments"))
+		FDialog.ask(m_WindowNo, this, "PrintShipments", new Callback<Boolean>() {
-			return;
+			@Override
-				
+			public void onCallback(Boolean result) {
+				if (result) {
 					m_messageText.append("<p>").append(Msg.getMsg(Env.getCtx(), "PrintShipments")).append("</p>");
 					message.setContent(m_messageText.toString());
 					showBusyDialog();
-		Clients.response(new AuEcho(this, "onPrintShipments", null));
+					Clients.response(new AuEcho(ProcessDialog.this, "onPrintShipments", null));
+				}
+			}
+		});						
 	}	//	printInvoices
 	
 	public void onPrintShipments() 
@@ -559,6 +573,10 @@ public class ProcessDialog extends Window implements EventListener<Event>, IProc
 				log.log(Level.SEVERE, e.getLocalizedMessage(), e);
 			}
 		}
+		
+		// If the process is a silent one and no errors occured, close the dialog
+		if(m_ShowHelp != null && m_ShowHelp.equals("S"))
+			this.dispose();	
 	}
 
 	/**
@@ -568,12 +586,19 @@ public class ProcessDialog extends Window implements EventListener<Event>, IProc
 	{
 		if (m_ids == null)
 			return;
-		if (!FDialog.ask(m_WindowNo, this, "PrintInvoices"))
+		FDialog.ask(m_WindowNo, this, "PrintInvoices", new Callback<Boolean>() {
-			return;
+			@Override
+			public void onCallback(Boolean result) 
+			{
+				if (result)
+				{
 					m_messageText.append("<p>").append(Msg.getMsg(Env.getCtx(), "PrintInvoices")).append("</p>");
 					message.setContent(m_messageText.toString());
 					showBusyDialog();
-		Clients.response(new AuEcho(this, "onPrintInvoices", null));				
+					Clients.response(new AuEcho(ProcessDialog.this, "onPrintInvoices", null));
+				}
+			}
+		});						
 	}	//	printInvoices
 	
 	public void onPrintInvoices()
@@ -630,6 +655,10 @@ public class ProcessDialog extends Window implements EventListener<Event>, IProc
 				log.log(Level.SEVERE, e.getLocalizedMessage(), e);
 			}
 		}
+		
+		// If the process is a silent one and no errors occured, close the dialog
+		if(m_ShowHelp != null && m_ShowHelp.equals("S"))
+			this.dispose();	
 	}
 
 	public boolean isValid() {
@@ -661,7 +690,7 @@ public class ProcessDialog extends Window implements EventListener<Event>, IProc
 	}
 
 	@Override
-	public void ask(final String message, final Callback<String> callback) {
+	public void ask(final String message, final Callback<Boolean> callback) {
 		Executions.schedule(getDesktop(), new EventListener<Event>() {
 			@Override
 			public void onEvent(Event event) throws Exception {

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/ProcessModalDialog.java

@@ -108,7 +108,7 @@ public class ProcessModalDialog extends Window implements EventListener<Event>,
 		
 		if (listener != null) 
 		{
-			addEventListener(ON_MODAL_CLOSE, listener);
+			addEventListener(ON_WINDOW_CLOSE, listener);
 		}
 
 		log.info("Process=" + pi.getAD_Process_ID());
@@ -413,7 +413,6 @@ public class ProcessModalDialog extends Window implements EventListener<Event>,
 	private void onCancel() {
 		m_cancel = true;
 		this.dispose();
-		Events.sendEvent(this, new Event(ON_MODAL_CLOSE, this, null));
 	}
 
 	private void onStatusUpdate(Event event) {
@@ -433,7 +432,6 @@ public class ProcessModalDialog extends Window implements EventListener<Event>,
 			Events.postEvent(downloadDialog, new Event(MultiFileDownloadDialog.ON_SHOW));
 		}
 		dispose();		
-		Events.sendEvent(this, new Event(ON_MODAL_CLOSE, this, null));				
 	}
 
 	@Override
@@ -488,7 +486,7 @@ public class ProcessModalDialog extends Window implements EventListener<Event>,
 	}
 
 	@Override
-	public void ask(final String message, final Callback<String> callback) {
+	public void ask(final String message, final Callback<Boolean> callback) {
 		Executions.schedule(getDesktop(), new EventListener<Event>() {
 			@Override
 			public void onEvent(Event event) throws Exception {

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/form/WCreateFromWindow.java

@@ -137,14 +137,12 @@ public class WCreateFromWindow extends Window implements EventListener<Event>, W
 			{
 				FDialog.error(windowNo, this, "Error", ex.getLocalizedMessage());
 			}
-			Events.sendEvent(this, new Event(ON_MODAL_CLOSE, this, null));
 		}
 		//  Cancel
 		else if (e.getTarget().getId().equals(ConfirmPanel.A_CANCEL))
 		{
 			isCancel = true;
 			dispose();
-			Events.sendEvent(this, new Event(ON_MODAL_CLOSE, this, null));
 		}
 		// Select All
 		// Trifon

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/form/WFileImport.java

@@ -31,6 +31,7 @@ import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.logging.Level;
 
+import org.adempiere.webui.AdempiereWebUI;
 import org.adempiere.webui.component.Button;
 import org.adempiere.webui.component.ConfirmPanel;
 import org.adempiere.webui.component.Label;
@@ -53,6 +54,7 @@ import org.zkoss.util.media.Media;
 import org.zkoss.zk.ui.event.Event;
 import org.zkoss.zk.ui.event.EventListener;
 import org.zkoss.zk.ui.event.Events;
+import org.zkoss.zk.ui.event.UploadEvent;
 import org.zkoss.zul.Borderlayout;
 import org.zkoss.zul.Center;
 import org.zkoss.zul.North;
@@ -116,6 +118,7 @@ public class WFileImport extends ADForm implements EventListener
 
 	public WFileImport()
 	{
+		this.addEventListener(Events.ON_UPLOAD, this);
 	}
 	
 	/**
@@ -305,6 +308,11 @@ public class WFileImport extends ADForm implements EventListener
 			SessionManager.getAppDesktop().closeActiveWindow();
 			return;			
 		}
+		else if (e instanceof UploadEvent) 
+		{
+			UploadEvent ue = (UploadEvent) e;
+			processUploadMedia(ue.getMedia());
+		}
 		
 		if (m_data != null && m_data.size()	> 0					//	file loaded
 			&& m_format != null && m_format.getRowCount() > 0)	//	format loaded
@@ -319,10 +327,12 @@ public class WFileImport extends ADForm implements EventListener
 	
 	private void cmd_loadFile()
 	{
-		Media media = null;
+		Media media = Fileupload.get();
-		
+		if (AdempiereWebUI.isEventThreadEnabled())
-		media = Fileupload.get();
+			processUploadMedia(media);
+	}
 
+	private void processUploadMedia(Media media) {
 		if (media == null)
 			return;
 		

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/form/WGenForm.java

@@ -19,6 +19,7 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.logging.Level;
 
+import org.adempiere.util.Callback;
 import org.adempiere.webui.LayoutUtils;
 import org.adempiere.webui.apps.AEnv;
 import org.adempiere.webui.apps.BusyDialog;
@@ -339,11 +340,19 @@ public class WGenForm extends ADForm implements EventListener, WTableModelListen
 	public void onAfterProcess()
 	{
 		//	OK to print
-		if (FDialog.ask(getWindowNo(), this, genForm.getAskPrintMsg()))
+		FDialog.ask(getWindowNo(), this, genForm.getAskPrintMsg(), new Callback<Boolean>() {
+			
+			@Override
+			public void onCallback(Boolean result) 
+			{
+				if (result) 
 				{
 					Clients.showBusy("Processing...");
-			Clients.response(new AuEcho(this, "onPrint", null));			
+					Clients.response(new AuEcho(WGenForm.this, "onPrint", null));
-		}	//	OK to print
+				}
+				
+			}
+		});
 	}
 	
 	public void onPrint() 

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/form/WMerge.java

@@ -18,6 +18,7 @@ package org.adempiere.webui.apps.form;
 
 import java.util.logging.Level;
 
+import org.adempiere.util.Callback;
 import org.adempiere.webui.apps.BusyDialog;
 import org.adempiere.webui.component.ConfirmPanel;
 import org.adempiere.webui.component.Grid;
@@ -238,17 +239,29 @@ public class WMerge extends Merge implements IFormController, EventListener
 
 		m_msg = Msg.getMsg(Env.getCtx(), "MergeFrom") + " = " + from_Info
 			+ "\n" + Msg.getMsg(Env.getCtx(), "MergeTo") + " = " + to_Info;				
-		if (!FDialog.ask(m_WindowNo, form, "MergeQuestion", m_msg))
-			return;
 		
-		updateDeleteTable(columnName);
+		final String columnNameRef = columnName;
+		final int fromIdRef = from_ID;
+		final int toIdRef = to_ID;
+		FDialog.ask(m_WindowNo, form, "MergeQuestion", m_msg, new Callback<Boolean>() {
+
+			@Override
+			public void onCallback(Boolean result) 
+			{
+				if (result)
+				{
+					updateDeleteTable(columnNameRef);
 
 					progressWindow = new BusyDialog();
 					progressWindow.setPage(form.getPage());
 					progressWindow.doHighlighted();
 					
-		runnable = new MergeRunnable(columnName, from_ID, to_ID);
+					runnable = new MergeRunnable(columnNameRef, fromIdRef, toIdRef);
 					Clients.response(new AuEcho(form, "runProcess", null));
+				}
+				
+			}
+		});				
 	}   //  actionPerformed
 	
 	class MergeRunnable implements Runnable {

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/form/WPayPrint.java

@@ -22,6 +22,7 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.logging.Level;
 
+import org.adempiere.util.Callback;
 import org.adempiere.webui.apps.AEnv;
 import org.adempiere.webui.component.Button;
 import org.adempiere.webui.component.ConfirmPanel;
@@ -57,6 +58,7 @@ import org.compiere.util.Env;
 import org.compiere.util.Msg;
 import org.compiere.util.PaymentExport;
 import org.compiere.util.ValueNamePair;
+import org.python.antlr.ast.Call;
 import org.zkoss.zk.ui.event.Event;
 import org.zkoss.zk.ui.event.EventListener;
 import org.zkoss.zul.Borderlayout;
@@ -365,12 +367,20 @@ public class WPayPrint extends PayPrint implements IFormController, EventListene
 				FDialog.info(m_WindowNo, form, "Saved",
 						Msg.getMsg(Env.getCtx(), "NoOfLines") + "=" + no);
 
-				if (FDialog.ask(m_WindowNo, form, "VPayPrintSuccess?"))
+				FDialog.ask(m_WindowNo, form, "VPayPrintSuccess?", new Callback<Boolean>() {
+					
+					@Override
+					public void onCallback(Boolean result) 
 					{
-			//	int lastDocumentNo =
+						if (result)
+						{
+//							int lastDocumentNo =
 							MPaySelectionCheck.confirmPrint (m_checks, m_batch);
 							//	document No not updated
 						}
+						
+					}
+				});
 			} else {
 				FDialog.error(m_WindowNo, form, "Error", err.toString());
 			}
@@ -441,6 +451,7 @@ public class WPayPrint extends PayPrint implements IFormController, EventListene
 			log.log(Level.SEVERE, e.getLocalizedMessage(), e);
 			return;
 		}
+		final SimplePDFViewer chequeViewerRef = chequeViewer;
 
 		if (lastDocumentNo != 0)
 		{
@@ -451,10 +462,15 @@ public class WPayPrint extends PayPrint implements IFormController, EventListene
 			DB.executeUpdate(sb.toString(), null);
 		}
 
-		SimplePDFViewer remitViewer = null;
+		FDialog.ask(m_WindowNo, form, "VPayPrintPrintRemittance", new Callback<Boolean>() {
-		if (FDialog.ask(m_WindowNo, form, "VPayPrintPrintRemittance"))
+
+			@Override
+			public void onCallback(Boolean result) 
 			{		
-			pdfList = new ArrayList<File>();
+				SimplePDFViewer remitViewer = null;
+				if (result)
+				{
+					List<File> pdfList = new ArrayList<File>();
 					for (int i = 0; i < m_checks.length; i++)
 					{
 						MPaySelectionCheck check = m_checks[i];
@@ -484,15 +500,17 @@ public class WPayPrint extends PayPrint implements IFormController, EventListene
 					{
 						log.log(Level.SEVERE, e.getLocalizedMessage(), e);
 					}
-		}	//	remittance
+				}
 				
 				dispose();
 
-		if (chequeViewer != null)
+				if (chequeViewerRef != null)
-			SessionManager.getAppDesktop().showWindow(chequeViewer);
+					SessionManager.getAppDesktop().showWindow(chequeViewerRef);
 
 				if (remitViewer != null)
 					SessionManager.getAppDesktop().showWindow(remitViewer);
+			}
+		});
 	}   //  cmd_print
 
 

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/form/WPaySelect.java

@@ -369,25 +369,33 @@ public class WPaySelect extends PaySelect
 		}
 
 		//  Ask to Post it
-		if (!FDialog.ask(m_WindowNo, form, "VPaySelectGenerate?", "(" + m_ps.getName() + ")"))
+		FDialog.ask(m_WindowNo, form, "VPaySelectGenerate?", "(" + m_ps.getName() + ")", new Callback<Boolean>() {
-			return;
 
+			@Override
+			public void onCallback(Boolean result) 
+			{
+				if (result)
+				{
 				//  Prepare Process 
 					int AD_Proces_ID = PROCESS_C_PAYSELECTION_CREATEPAYMENT;	//	C_PaySelection_CreatePayment
 
 					//	Execute Process
-		ProcessModalDialog dialog = new ProcessModalDialog(this, m_WindowNo, 
+					ProcessModalDialog dialog = new ProcessModalDialog(WPaySelect.this, m_WindowNo, 
 							AD_Proces_ID, X_C_PaySelection.Table_ID, m_ps.getC_PaySelection_ID(), false);
 					if (dialog.isValid()) {
 						try {
 							dialog.setWidth("500px");
 							dialog.setVisible(true);
 							dialog.setPage(form.getPage());
-				dialog.doModal();
+							dialog.doHighlighted();
 						} catch (SuspendNotAllowedException e) {
 							log.log(Level.SEVERE, e.getLocalizedMessage(), e);
 						}
 					}
+				}
+				
+			}
+		});				
 	}   //  generatePaySelect
 	
 	/**
@@ -447,7 +455,7 @@ public class WPaySelect extends PaySelect
 	}
 
 	@Override
-	public void ask(final String message, final Callback<String> callback) {
+	public void ask(final String message, final Callback<Boolean> callback) {
 		Executions.schedule(form.getDesktop(), new EventListener<Event>() {
 			@Override
 			public void onEvent(Event event) throws Exception {

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/form/WPayment.java

@@ -940,13 +940,6 @@ public class WPayment extends Window
 		}
 	}	//	actionPerformed
 
-	@Override
-	public void dispose() {
-		super.dispose();
-		Events.sendEvent(this, new Event(ON_MODAL_CLOSE, this, null));
-	}
-
-
 	public void lockUI() {
 		if (m_isLocked) return;
 		

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/form/WTreeMaintenance.java

@@ -19,6 +19,7 @@ package org.adempiere.webui.apps.form;
 import java.util.ArrayList;
 import java.util.logging.Level;
 
+import org.adempiere.util.Callback;
 import org.adempiere.webui.LayoutUtils;
 import org.adempiere.webui.component.Button;
 import org.adempiere.webui.component.Checkbox;
@@ -388,7 +389,14 @@ public class WTreeMaintenance extends TreeMaintenance implements IFormController
 	 */
 	private void action_treeAddAll()
 	{
-		if (FDialog.ask(m_WindowNo, null, "TreeAddAllItems")) {	// idempiere-85
+		// idempiere-85
+		FDialog.ask(m_WindowNo, null, "TreeAddAllItems", new Callback<Boolean>() {
+			
+			@Override
+			public void onCallback(Boolean result) 
+			{
+				if (result)
+				{
 					log.info("");
 					ListModel model = centerList.getModel();
 					int size = model.getSize();
@@ -399,6 +407,8 @@ public class WTreeMaintenance extends TreeMaintenance implements IFormController
 						action_treeAdd(item);
 					}
 				}
+			}
+		});
 	}	//	action_treeAddAll
 	
 	/**
@@ -407,7 +417,14 @@ public class WTreeMaintenance extends TreeMaintenance implements IFormController
 	private void action_treeDeleteAll()
 	{
 		log.info("");
-		if (FDialog.ask(m_WindowNo, null, "TreeRemoveAllItems")) {	// idempiere-85
+		// idempiere-85
+		FDialog.ask(m_WindowNo, null, "TreeRemoveAllItems", new Callback<Boolean>() {
+
+			@Override
+			public void onCallback(Boolean result) 
+			{
+				if (result)
+				{
 					ListModel model = centerList.getModel();
 					int size = model.getSize();
 					int index = -1;
@@ -417,6 +434,9 @@ public class WTreeMaintenance extends TreeMaintenance implements IFormController
 						action_treeDelete(item);
 					}
 				}
+				
+			}
+		});
 	}	//	action_treeDeleteAll
 	
 	public ADForm getForm() 

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/wf/WFEditor.java

@@ -27,6 +27,8 @@ import org.adempiere.webui.component.Listbox;
 import org.adempiere.webui.component.ListboxFactory;
 import org.adempiere.webui.component.Textbox;
 import org.adempiere.webui.component.ToolBar;
+import org.adempiere.webui.component.Window;
+import org.adempiere.webui.event.DialogEvents;
 import org.adempiere.webui.panel.ADForm;
 import org.compiere.apps.wf.WFGraphLayout;
 import org.compiere.apps.wf.WFNodeWidget;
@@ -62,7 +64,6 @@ import org.zkoss.zul.Separator;
 import org.zkoss.zul.Space;
 import org.zkoss.zul.Toolbarbutton;
 import org.zkoss.zul.Vbox;
-import org.zkoss.zul.Window;
 
 /**
  *
@@ -208,15 +209,14 @@ public class WFEditor extends ADForm {
 				w.onClose();
 			}
 		});
-		try {
+		
 		w.setWidth("250px");
 		w.setBorder("normal");
 		w.setPage(this.getPage());
-			w.doModal();
+		w.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
-		} catch (SuspendNotAllowedException e) {
-			e.printStackTrace();
-		}
 
+			@Override
+			public void onEvent(Event event) throws Exception {
 				String name = text.getText();
 				if (name != null && name.length() > 0)
 				{
@@ -227,6 +227,9 @@ public class WFEditor extends ADForm {
 					reload(m_wf.getAD_Workflow_ID());
 				}				
 			}
+		});
+		w.doHighlighted();				
+	}
 
 	void reload(int workflowId) {
 		center.removeChild(table);

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/component/Messagebox.java

@@ -26,6 +26,7 @@ import org.compiere.util.Env;
 import org.compiere.util.Msg;
 import org.compiere.util.Util;
 import org.zkoss.zhtml.Text;
+import org.zkoss.zk.ui.Page;
 import org.zkoss.zk.ui.event.Event;
 import org.zkoss.zk.ui.event.EventListener;
 import org.zkoss.zk.ui.event.Events;
@@ -63,8 +64,7 @@ public class Messagebox extends Window implements EventListener<Event>
 	private Image img = new Image();
 
 	private int returnValue;
-	private Callback<String> callback;
+	private Callback<Integer> callback;
-	private String callbackValue;
 
 	/** A OK button. */
 	public static final int OK = 0x0001;
@@ -199,7 +199,12 @@ public class Messagebox extends Window implements EventListener<Event>
 		return show(message, title, buttons, icon, null);
 	}
 	
-	public int show(String message, String title, int buttons, String icon, Callback<String> callback)
+	public int show(String message, String title, int buttons, String icon, Callback<Integer> callback)
+	{
+		return show(message, title, buttons, icon, callback, false);
+	}
+	
+	public int show(String message, String title, int buttons, String icon, Callback<Integer> callback, boolean modal)
 	{
 		this.msg = message;
 		this.imgSrc = icon;
@@ -239,10 +244,7 @@ public class Messagebox extends Window implements EventListener<Event>
 		this.setTitle(title);
 		this.setPosition("center");
 		this.setClosable(true);
-		if (Events.inEventListener())
+		this.setAttribute(Window.MODE_KEY, modal ? Window.MODE_MODAL : Window.MODE_HIGHLIGHTED);
-			this.setAttribute(Window.MODE_KEY, Window.MODE_MODAL);
-		else
-			this.setAttribute(Window.MODE_KEY, Window.MODE_HIGHLIGHTED);
 		this.setSizable(true);
 
 		this.setVisible(true);
@@ -251,16 +253,21 @@ public class Messagebox extends Window implements EventListener<Event>
 		return returnValue;
 	}
 
-	public static int showDialog(String message, String title, int buttons, String icon) throws InterruptedException
+	public static int showDialog(String message, String title, int buttons, String icon) 
 	{
 		return showDialog(message, title, buttons, icon, null);
 	}
 	
-	public static int showDialog(String message, String title, int buttons, String icon, Callback<String> callback) throws InterruptedException
+	public static int showDialog(String message, String title, int buttons, String icon, Callback<Integer> callback)
+	{
+		return showDialog(message, title, buttons, icon, callback, false);
+	}
+	
+	public static int showDialog(String message, String title, int buttons, String icon, Callback<Integer> callback, boolean modal) 
 	{
 		Messagebox msg = new Messagebox();
 
-		return msg.show(message, title, buttons, icon, callback);
+		return msg.show(message, title, buttons, icon, callback, modal);
 	}
 
 	public void onEvent(Event event) throws Exception
@@ -268,53 +275,44 @@ public class Messagebox extends Window implements EventListener<Event>
 		if (event == null)
 			return;
 
-		callbackValue = null;
-		
 		if (event.getTarget() == btnOk)
 		{
 			returnValue = OK;
-			callbackValue = "OK";
 		}
 		else if (event.getTarget() == btnCancel)
 		{
 			returnValue = CANCEL;
-			callbackValue = "CANCEL";
 		}
 		else if (event.getTarget() == btnYes)
 		{
 			returnValue = YES;
-			callbackValue = "YES";
 		}
 		else if (event.getTarget() == btnNo)
 		{
 			returnValue = NO;
-			callbackValue = "NO";
 		}
 		else if (event.getTarget() == btnAbort)
 		{
 			returnValue = ABORT;
-			callbackValue = "ABORT";
 		}
 		else if (event.getTarget() == btnRetry)
 		{
 			returnValue = RETRY;
-			callbackValue = "RETRY";
 		}
 		else if (event.getTarget() == btnIgnore)
 		{
 			returnValue = IGNORE;
-			callbackValue = "IGNORE";
 		}
 
 		this.detach();
 	}
 
 	@Override
-	public void detach() {
+	public void onPageDetached(Page page) {
-		super.detach();
+		super.onPageDetached(page);
 		if (callback != null)
 		{
-			callback.onCallback(callbackValue);
+			callback.onCallback(returnValue);
 		}
 	}
 }

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/component/Window.java

@@ -17,6 +17,11 @@
 
 package org.adempiere.webui.component;
 
+import org.adempiere.webui.event.DialogEvents;
+import org.zkoss.zk.ui.Page;
+import org.zkoss.zk.ui.event.Event;
+import org.zkoss.zk.ui.event.Events;
+
 /**
  *
  * @author  <a href="mailto:agramdass@gmail.com">Ashley G Ramdass</a>
@@ -62,4 +67,15 @@ public class Window extends org.zkoss.zul.Window
     {
     	detach();
     }
+
+	/* (non-Javadoc)
+	 * @see org.zkoss.zul.Window#onPageDetached(org.zkoss.zk.ui.Page)
+	 */
+	@Override
+	public void onPageDetached(Page page) {
+		super.onPageDetached(page);
+		Events.sendEvent(this, new Event(DialogEvents.ON_WINDOW_CLOSE, this, null));
+	}
+    
+    
 }

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/desktop/AbstractDesktop.java

@@ -16,14 +16,18 @@ package org.adempiere.webui.desktop;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.adempiere.webui.AdempiereWebUI;
 import org.adempiere.webui.ClientInfo;
 import org.adempiere.webui.component.Window;
+import org.adempiere.webui.event.DialogEvents;
 import org.adempiere.webui.exception.ApplicationException;
 import org.adempiere.webui.part.AbstractUIPart;
 import org.compiere.model.MMenu;
 import org.compiere.util.CLogger;
 import org.compiere.util.Env;
-import org.zkoss.zk.ui.event.Events;
+import org.zkoss.zk.ui.Executions;
+import org.zkoss.zk.ui.event.Event;
+import org.zkoss.zk.ui.event.EventListener;
 
 /**
  * Base class for desktop implementation
@@ -142,17 +146,11 @@ public abstract class AbstractDesktop extends AbstractUIPart implements IDesktop
      * @param win
      * @param pos
      */
-   	public void showWindow(Window win, String pos)
+   	public void showWindow(final Window win, final String pos)
 	{
-   		win.setPage(page);		
 		Object objMode = win.getAttribute(Window.MODE_KEY);
 
-		String mode = Window.MODE_MODAL;
+		final String mode = objMode != null ? objMode.toString() : Window.MODE_HIGHLIGHTED;
-		
-		if (objMode != null)
-		{
-			mode = objMode.toString();
-		}
 		
 		if (Window.MODE_MODAL.equals(mode))
 		{
@@ -160,7 +158,27 @@ public abstract class AbstractDesktop extends AbstractUIPart implements IDesktop
 				win.setPosition(pos);
 			showModal(win);
 		}
-		else if (Window.MODE_POPUP.equals(mode))
+		else 
+		{
+			if (Executions.getCurrent() != null) 
+			{
+				showNonModalWindow(win, pos, mode);
+			}
+			else
+			{
+				Executions.schedule(getComponent().getDesktop(), new EventListener<Event>() {
+					@Override
+					public void onEvent(Event event) throws Exception {
+						showNonModalWindow(win, pos, mode);
+					}
+				}, new Event("onExecute"));
+			}
+		}
+	}
+
+	private void showNonModalWindow(final Window win, final String pos,
+			final String mode) {		
+		if (Window.MODE_POPUP.equals(mode))
 		{
 			showPopup(win, pos);
 		}
@@ -184,18 +202,47 @@ public abstract class AbstractDesktop extends AbstractUIPart implements IDesktop
    	 * 
    	 * @param win
    	 */
-   	protected void showModal(Window win)
+   	protected void showModal(final Window win)
    	{
-   		//fall back to highlighted if can't execute doModal
+   		if (AdempiereWebUI.isEventThreadEnabled()) 
-   		if (Events.inEventListener())
    		{
+   			win.setPage(page);
    			win.doModal();
    		}
    		else 
    		{
-   			showHighlighted(win, null);
+	   		if (Executions.getCurrent() != null)
+	   		{
+	   			throw new RuntimeException("When event thread is disabled, you can only show modal window in background thread that doesn't update Desktop.");
 	   		}
 	   		
+	   		final StringBuffer buffer = new StringBuffer();
+	   		win.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
+				@Override
+				public void onEvent(Event event) throws Exception {
+					buffer.append("*");
+				}
+			});
+	   		
+	   		Executions.schedule(this.getComponent().getDesktop(), new EventListener<Event>() {
+				@Override
+				public void onEvent(Event event) throws Exception {
+					showHighlighted(win, null);
+					if (win.getPage() == null) {
+						buffer.append("*");
+					}
+				}
+			}, new Event("onExecute"));
+	   		
+			while(buffer.length() == 0)
+			{
+				try {
+					Thread.sleep(500);
+				} catch (InterruptedException e) {
+					Thread.interrupted();
+				}
+			}
+   		}
 	}
    	
    	/**
@@ -210,6 +257,7 @@ public abstract class AbstractDesktop extends AbstractUIPart implements IDesktop
    		else
    			win.setPosition(position);
    		
+   		win.setPage(page);
    		win.doPopup();
    	}
    	
@@ -225,6 +273,7 @@ public abstract class AbstractDesktop extends AbstractUIPart implements IDesktop
 		else
 			win.setPosition(position);
 		
+		win.setPage(page);
    		win.doOverlapped();
    	}
 	
@@ -240,6 +289,7 @@ public abstract class AbstractDesktop extends AbstractUIPart implements IDesktop
 		else
 			win.setPosition(position);
 		
+		win.setPage(page);
    		win.doHighlighted();
    	}   	
 }

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/editor/WAccountEditor.java

@@ -17,6 +17,7 @@ import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.util.logging.Level;
 
+import org.adempiere.util.Callback;
 import org.adempiere.webui.component.Combinationbox;
 import org.adempiere.webui.event.ContextMenuEvent;
 import org.adempiere.webui.event.ContextMenuListener;
@@ -96,9 +97,12 @@ public class WAccountEditor extends WEditor implements ContextMenuListener
 		{
 			C_AcctSchema_ID = Env.getContextAsInt(Env.getCtx(), "$C_AcctSchema_ID");
 		}
-		WAccountDialog ad = new WAccountDialog (gridField.getHeader(), m_mAccount, C_AcctSchema_ID);
+		new WAccountDialog (gridField.getHeader(), m_mAccount, C_AcctSchema_ID, new Callback<Integer>() {
-		//
+			
-		Integer newValue = ad.getValue();
+			@Override
+			public void onCallback(Integer result) {
+				Integer newValue = result;
+				
 				if (newValue == null)
 					return;
 
@@ -106,8 +110,11 @@ public class WAccountEditor extends WEditor implements ContextMenuListener
 
 				//	set & redisplay
 				setValue(newValue);
-		ValueChangeEvent changeEvent = new ValueChangeEvent(this, this.getColumnName(), oldValue, newValue);
+				ValueChangeEvent changeEvent = new ValueChangeEvent(WAccountEditor.this, getColumnName(), oldValue, newValue);
 				fireValueChange(changeEvent);
+			}
+		});
+		//				
 	}	//	cmd_button
 
 	/**

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/editor/WFilenameEditor.java

@@ -21,13 +21,16 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.logging.Level;
 
+import org.adempiere.webui.AdempiereWebUI;
 import org.adempiere.webui.component.FilenameBox;
 import org.adempiere.webui.event.ValueChangeEvent;
 import org.compiere.model.GridField;
 import org.compiere.util.CLogger;
 import org.zkoss.util.media.Media;
+import org.zkoss.zk.ui.Component;
 import org.zkoss.zk.ui.event.Event;
 import org.zkoss.zk.ui.event.Events;
+import org.zkoss.zk.ui.event.UploadEvent;
 import org.zkoss.zul.Fileupload;
 
 /**
@@ -107,6 +110,12 @@ public class WFilenameEditor extends WEditor
 			cmd_file();
 			newValue = getComponent().getText();
 		}
+		else if (event instanceof UploadEvent)
+		{
+			UploadEvent ue = (UploadEvent) event;
+			processUploadMedia(ue.getMedia());
+			return;
+		}
 		else
 		{
 			return;
@@ -122,16 +131,30 @@ public class WFilenameEditor extends WEditor
 		fireValueChange(changeEvent);
 	}
 
+	private Component parent = null;
+	
 	/**
 	 *  Load file
 	 */
 	private void cmd_file()
 	{
+		if (parent == null || getComponent().getParent() != parent)
+		{
+			if (parent != null)
+			{
+				parent.removeEventListener(Events.ON_UPLOAD, this);
+			}
+			parent = getComponent().getParent();
+			parent.addEventListener(Events.ON_UPLOAD, this);
+		}
+		
 		//  Show File Open Dialog
-		Media file = null;
+		Media media = Fileupload.get(true);
-
+		if (AdempiereWebUI.isEventThreadEnabled())
-		file = Fileupload.get(true);
+			processUploadMedia(media);
+	}   //  cmd_file
 
+	private void processUploadMedia(Media file) {
 		if (file == null)
 			return;
 
@@ -173,7 +196,7 @@ public class WFilenameEditor extends WEditor
 		}
 
 		getComponent().setText(fileName);
-	}   //  cmd_file
+	}
 
 	public String[] getEvents()
     {

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/editor/WImageEditor.java

@@ -16,6 +16,7 @@ package org.adempiere.webui.editor;
 
 import java.util.logging.Level;
 
+import org.adempiere.webui.event.DialogEvents;
 import org.adempiere.webui.event.ValueChangeEvent;
 import org.adempiere.webui.window.WImageDialog;
 import org.compiere.model.GridField;
@@ -24,6 +25,7 @@ import org.compiere.util.CLogger;
 import org.compiere.util.Env;
 import org.zkoss.image.AImage;
 import org.zkoss.zk.ui.event.Event;
+import org.zkoss.zk.ui.event.EventListener;
 import org.zkoss.zk.ui.event.Events;
 import org.zkoss.zul.Image;
 
@@ -153,7 +155,11 @@ public class WImageEditor extends WEditor
 	{
 		if (Events.ON_CLICK.equals(event.getName()) && readwrite)
 		{
-			WImageDialog vid = new WImageDialog(m_mImage);
+			final WImageDialog vid = new WImageDialog(m_mImage);
+			vid.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
+
+				@Override
+				public void onEvent(Event event) throws Exception {
 					if (!vid.isCancel()) {
 						int AD_Image_ID = vid.getAD_Image_ID();
 						Object oldValue = getValue();
@@ -164,9 +170,12 @@ public class WImageEditor extends WEditor
 						m_mImage = null;	//	force reload
 						setValue(newValue);	//	set explicitly
 						//
-				ValueChangeEvent vce = new ValueChangeEvent(this, gridField.getColumnName(), oldValue, newValue);
+						ValueChangeEvent vce = new ValueChangeEvent(WImageEditor.this, gridField.getColumnName(), oldValue, newValue);
 						fireValueChange(vce);
 					}
+					
+				}
+			});			
 		}
 	}
 }

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/editor/WPAttributeEditor.java

@@ -19,6 +19,7 @@ import org.adempiere.webui.apps.AEnv;
 import org.adempiere.webui.component.PAttributebox;
 import org.adempiere.webui.event.ContextMenuEvent;
 import org.adempiere.webui.event.ContextMenuListener;
+import org.adempiere.webui.event.DialogEvents;
 import org.adempiere.webui.event.ValueChangeEvent;
 import org.adempiere.webui.window.WFieldRecordInfo;
 import org.adempiere.webui.window.WPAttributeDialog;
@@ -31,6 +32,7 @@ import org.compiere.model.SystemIDs;
 import org.compiere.util.CLogger;
 import org.compiere.util.Env;
 import org.zkoss.zk.ui.event.Event;
+import org.zkoss.zk.ui.event.EventListener;
 import org.zkoss.zk.ui.event.Events;
 
 /**
@@ -150,7 +152,7 @@ public class WPAttributeEditor extends WEditor implements ContextMenuListener, S
 	{
 		//
 		Integer oldValue = (Integer)getValue ();
-		int oldValueInt = oldValue == null ? 0 : oldValue.intValue ();
+		final int oldValueInt = oldValue == null ? 0 : oldValue.intValue ();
 		int M_AttributeSetInstance_ID = oldValueInt;
 		int M_Product_ID = 0;
 		int M_ProductBOM_ID = 0;
@@ -167,7 +169,7 @@ public class WPAttributeEditor extends WEditor implements ContextMenuListener, S
 			+ ", AD_Column_ID=" + gridField.getAD_Column_ID());
 
 		//	M_Product.M_AttributeSetInstance_ID = 8418
-		boolean productWindow = (gridField.getAD_Column_ID() == COLUMN_M_PRODUCT_M_ATTRIBUTESETINSTANCE_ID);		//	HARDCODED
+		final boolean productWindow = (gridField.getAD_Column_ID() == COLUMN_M_PRODUCT_M_ATTRIBUTESETINSTANCE_ID);		//	HARDCODED
 
 		//	Exclude ability to enter ASI
 		boolean exclude = true;
@@ -183,21 +185,27 @@ public class WPAttributeEditor extends WEditor implements ContextMenuListener, S
 			}
 		}
 
-		boolean changed = false;
 		if (M_ProductBOM_ID != 0)	//	Use BOM Component
 			M_Product_ID = M_ProductBOM_ID;
 		//
 		if (!productWindow && (M_Product_ID == 0 || exclude))
 		{
-			changed = true;
 			getComponent().setText(null);
 			M_AttributeSetInstance_ID = 0;
+			
+			processChanges(oldValueInt, M_AttributeSetInstance_ID);
 		}
 		else
 		{
-			WPAttributeDialog vad = new WPAttributeDialog (
+			final WPAttributeDialog vad = new WPAttributeDialog (
 				M_AttributeSetInstance_ID, M_Product_ID, m_C_BPartner_ID,
 				productWindow, gridField.getAD_Column_ID(), m_WindowNo);
+			vad.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
+
+				@Override
+				public void onEvent(Event event) throws Exception {
+					boolean changed = false;
+					int M_AttributeSetInstance_ID = 0;
 					if (vad.isChanged())
 					{
 						getComponent().setText(vad.getM_AttributeSetInstanceName());
@@ -206,6 +214,15 @@ public class WPAttributeEditor extends WEditor implements ContextMenuListener, S
 							m_GridTab.setValue("M_Locator_ID", vad.getM_Locator_ID());
 						changed = true;
 					}
+					
+					//	Set Value
+					if (changed)
+					{
+						processChanges(oldValueInt, M_AttributeSetInstance_ID);
+					}	//	change
+				}
+			});
+			
 		}
 		/** Selection
 		{
@@ -244,10 +261,9 @@ public class WPAttributeEditor extends WEditor implements ContextMenuListener, S
 			}
 		}
 		**/		
+	}   //  cmd_file
 
-		//	Set Value
+	private void processChanges(int oldValueInt, int M_AttributeSetInstance_ID) {
-		if (changed)
-		{
 		log.finest("Changed M_AttributeSetInstance_ID=" + M_AttributeSetInstance_ID);
 		m_value = new Object();				//	force re-query display
 		if (M_AttributeSetInstance_ID == 0)
@@ -262,8 +278,7 @@ public class WPAttributeEditor extends WEditor implements ContextMenuListener, S
 			//  force Change - user does not realize that embedded object is already saved.
 			m_GridTab.processFieldChange(gridField);
 		}
-		}	//	change
+	}
-	}   //  cmd_file
 
 	public String[] getEvents()
     {

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/editor/WSearchEditor.java

@@ -28,6 +28,7 @@ import org.adempiere.webui.apps.AEnv;
 import org.adempiere.webui.component.Searchbox;
 import org.adempiere.webui.event.ContextMenuEvent;
 import org.adempiere.webui.event.ContextMenuListener;
+import org.adempiere.webui.event.DialogEvents;
 import org.adempiere.webui.event.ValueChangeEvent;
 import org.adempiere.webui.event.ValueChangeListener;
 import org.adempiere.webui.factory.InfoManager;
@@ -46,6 +47,7 @@ import org.compiere.util.DisplayType;
 import org.compiere.util.Env;
 import org.compiere.util.Msg;
 import org.zkoss.zk.ui.event.Event;
+import org.zkoss.zk.ui.event.EventListener;
 import org.zkoss.zk.ui.event.Events;
 
 /**
@@ -476,9 +478,6 @@ public class WSearchEditor extends WEditor implements ContextMenuListener, Value
 		 *  - Window closed                 -> ignore       => result == null && !cancalled
 		 */
 
-		Object result[] = null;
-		boolean cancelled = false;
-
 		//  Zoom / Validation
 		String whereClause = getWhereClause();
 
@@ -493,16 +492,18 @@ public class WSearchEditor extends WEditor implements ContextMenuListener, Value
 		if (m_tableName == null)	//	sets table name & key column
 			getDirectAccessSQL("*");
 
-		InfoPanel ip = InfoManager.create(lookup, gridField, m_tableName, m_keyColumnName, queryValue, false, whereClause);
+		final InfoPanel ip = InfoManager.create(lookup, gridField, m_tableName, m_keyColumnName, queryValue, false, whereClause);
 		ip.setVisible(true);
 		ip.setStyle("border: 2px");
 		ip.setClosable(true);
-		ip.setAttribute("mode", "modal");
 		ip.addValueChangeListener(this);
 		infoPanel = ip;
-		AEnv.showWindow(ip);
+		ip.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
-		cancelled = ip.isCancelled();
+
-		result = ip.getSelectedKeys();
+			@Override
+			public void onEvent(Event event) throws Exception {
+				boolean cancelled = ip.isCancelled();
+				Object[] result = ip.getSelectedKeys();
 
 				infoPanel = null;
 				//  Result
@@ -523,7 +524,9 @@ public class WSearchEditor extends WEditor implements ContextMenuListener, Value
 				{
 					log.config(getColumnName() + " - Result = null (not cancelled)");
 				}
-
+			}
+		});
+		AEnv.showWindow(ip);
 	}
 
 	/**

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/event/DialogEvents.java

@@ -21,8 +21,8 @@ package org.adempiere.webui.event;
 public interface DialogEvents {
 
 	/**
-	 * on modal close event, use this for highlight mode modal dialog to perform action after the modal dialog closed.
+	 * on window close event, use this for highlight mode window to simulate modal window
 	 */
-	public final static String ON_MODAL_CLOSE = "onModalClose";
+	public final static String ON_WINDOW_CLOSE = "onWindowClose";
 	
 }

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/panel/ADTabpanel.java

@@ -17,9 +17,6 @@
 
 package org.adempiere.webui.panel;
 
-import java.beans.PropertyChangeEvent;
-import java.beans.PropertyVetoException;
-import java.beans.VetoableChangeListener;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
@@ -55,7 +52,6 @@ import org.compiere.model.DataStatusEvent;
 import org.compiere.model.DataStatusListener;
 import org.compiere.model.GridField;
 import org.compiere.model.GridTab;
-import org.compiere.model.GridTable;
 import org.compiere.model.GridWindow;
 import org.compiere.model.MLookup;
 import org.compiere.model.MTree;
@@ -96,7 +92,7 @@ import org.zkoss.zul.impl.XulElement;
  * @author Low Heng Sin
  */
 public class ADTabpanel extends Div implements Evaluatee, EventListener<Event>,
-DataStatusListener, IADTabpanel, VetoableChangeListener
+DataStatusListener, IADTabpanel
 {
 	private static final String ON_DEFER_SET_SELECTED_NODE = "onDeferSetSelectedNode";
 
@@ -152,8 +148,6 @@ DataStatusListener, IADTabpanel, VetoableChangeListener
 
 	private Group currentGroup;
 
-	private boolean m_vetoActive = false;
-
 	public ADTabpanel()
 	{
         init();
@@ -251,7 +245,6 @@ DataStatusListener, IADTabpanel, VetoableChangeListener
         listPanel.setWindowNo(windowNo);
         listPanel.setADWindowPanel(winPanel);
 
-        gridTab.getTableModel().addVetoableChangeListener(this);
     }
 
     /**
@@ -1213,34 +1206,6 @@ DataStatusListener, IADTabpanel, VetoableChangeListener
 		return false;
 	}
 
-	/**
-	 * @param e
-	 * @see VetoableChangeListener#vetoableChange(PropertyChangeEvent)
-	 */
-	public void vetoableChange(PropertyChangeEvent e)
-			throws PropertyVetoException {
-		//  Save Confirmation dialog    MTable-RowSave
-		if (e.getPropertyName().equals(GridTable.PROPERTY))
-		{
-			//  throw new PropertyVetoException will call this listener again to revert to old value
-			if (m_vetoActive)
-			{
-				//ignore
-				m_vetoActive = false;
-				return;
-			}
-			if (!Env.isAutoCommit(Env.getCtx(), getWindowNo()) || gridTab.getCommitWarning().length() > 0)
-			{
-				if (!FDialog.ask(getWindowNo(), this, "SaveChanges?", gridTab.getCommitWarning()))
-				{
-					m_vetoActive = true;
-					throw new PropertyVetoException ("UserDeniedSave", e);
-				}
-			}
-			return;
-		}   //  saveConfirmation
-	}
-
 	/**
 	 * @return boolean
 	 */

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/panel/AbstractADWindowPanel.java

@@ -494,14 +494,14 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
     					{
     						if (!includedMap.containsKey(gTab.getAD_Tab_ID()))
     						{
-    							setActiveTab(gridWindow.getTabIndex(gTab));
+    							setActiveTab(gridWindow.getTabIndex(gTab), null);
     						}
     						else
     						{
     							IADTabpanel parent = includedMap.get(gTab.getAD_Tab_ID());
     							int pindex = gridWindow.getTabIndex(parent.getGridTab());
     							if (pindex >= 0)
-    								setActiveTab(pindex);
+    								setActiveTab(pindex, null);
     						}
     						gTab.navigate(i);
     						return true;
@@ -707,7 +707,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
                     where.toString(), findFields, 10, mTab.getAD_Tab_ID()); // no query below 10
             if (find.isValid()) 
             {
-	        	find.addEventListener(DialogEvents.ON_MODAL_CLOSE, new EventListener<Event>() {
+	        	find.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
 					@Override
 					public void onEvent(Event event) throws Exception {
 						if (!find.isCancel())
@@ -750,7 +750,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
         int curInd = adTab.getSelectedIndex();
         if (curInd < maxInd)
         {
-            setActiveTab(curInd + 1);
+            setActiveTab(curInd + 1, null);
         }
 
         focusToActivePanel();
@@ -764,7 +764,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
         int curInd = adTab.getSelectedIndex();
         if (curInd > 0)
         {
-            setActiveTab(curInd - 1);
+            setActiveTab(curInd - 1, null);
         }
 
         focusToActivePanel();
@@ -865,11 +865,11 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 
 		if (gridWindow.isTransaction())
 		{
-			if (curTab.needSave(true, true) && !onSave(false))
+			final Runnable runnable = new Runnable() {				
-				return;
+				@Override
-
+				public void run() {
 					final WOnlyCurrentDays ocd = new WOnlyCurrentDays();
-			ocd.addEventListener(DialogEvents.ON_MODAL_CLOSE, new EventListener<Event>() {
+					ocd.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
 						@Override
 						public void onEvent(Event event) throws Exception {
 							m_onlyCurrentDays = ocd.getCurrentDays();
@@ -879,6 +879,26 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 					});						
 					AEnv.showWindow(ocd);					
 				}
+			};
+			if (curTab.needSave(true, true))
+			{
+				onSave(false, new Callback<Boolean>() {
+
+					@Override
+					public void onCallback(Boolean result) 
+					{
+						if (result)
+						{
+							runnable.run();
+						}						
+					}
+				});
+			}
+			else
+			{
+				runnable.run();
+			}
+		}		
     }
 
     private void history(int onlyCurrentDays)
@@ -917,14 +937,19 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 			return;
 		}
 
-		//	Attachment va =
+		EventListener<Event> listener = new EventListener<Event>() {
-		new WAttachment (	curWindowNo, curTab.getAD_AttachmentID(),
-							curTab.getAD_Table_ID(), record_ID, null);
 
+			@Override
+			public void onEvent(Event event) throws Exception {
 				curTab.loadAttachments();				//	reload
 				toolbar.getButton("Attachment").setPressed(curTab.hasAttachment());
 				focusToActivePanel();
 			}
+		};
+		//	Attachment va =
+		new WAttachment (	curWindowNo, curTab.getAD_AttachmentID(),
+							curTab.getAD_Table_ID(), record_ID, null, listener);		
+	}
 
     public void onChat()
     {
@@ -953,7 +978,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 		String description = infoName + ": " + infoDisplay;
 
     	WChat chat = new WChat(curWindowNo, curTab.getCM_ChatID(), curTab.getAD_Table_ID(), recordId, description, null);
-    	chat.addEventListener(DialogEvents.ON_MODAL_CLOSE, new EventListener<Event>() {
+    	chat.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
 			@Override
 			public void onEvent(Event event) throws Exception {
 				curTab.loadChats();
@@ -1023,34 +1048,43 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 	        {
 	        	int newTabIndex = tabList.getSelectedIndex();
 	
-	            if (setActiveTab(newTabIndex))
+	        	final IADTabList tabListRef = tabList;
+	        	final int originalTabIndex = curTabIndex;
+	            setActiveTab(newTabIndex, new Callback<Boolean>() {
+
+					@Override
+					public void onCallback(Boolean result) {
+						if (result)
 						{
 			            	//force sync model
-	            	tabList.refresh();
+			            	tabListRef.refresh();
 			            }
 			            else
 			            {
 			            	//reset to original
-	            	tabList.setSelectedIndex(curTabIndex);
+			            	tabListRef.setSelectedIndex(originalTabIndex);
 			            }
+						
+					}
+				});	            
 	        }
     	}
     	else if (event.getTarget() instanceof ProcessModalDialog)
     	{
     		ProcessModalDialog dialog = (ProcessModalDialog) event.getTarget();
     		onModalClose(dialog.getProcessInfo());
-    		onRefresh(false);
+    		onRefresh(false, false);
     	}
     }
 
-	private boolean setActiveTab(int newTabIndex) {
+	private void setActiveTab(final int newTabIndex, final Callback<Boolean> callback) {
-		boolean back = false;
 
-		int oldTabIndex = curTabIndex;
+		final int oldTabIndex = curTabIndex;
 
 		if (oldTabIndex == newTabIndex)
 		{
-		    return true;
+			if (callback != null)
+				callback.onCallback(true);
 		}
 
 		if (curTab != null)
@@ -1062,6 +1096,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 					((ADSortTab)curTabpanel).saveData();
 					((ADSortTab)curTabpanel).unregisterPanel();
 				}
+				setActiveTab0(oldTabIndex, newTabIndex, callback);
 			}
 			else if (curTab.needSave(true, false))
 		    {
@@ -1075,18 +1110,30 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 						{
 							showLastError();
 							//  there is a problem, stop here
-							return false;
+							if (callback != null)
+								callback.onCallback(false);
+							return;
 						}
+						setActiveTab0(oldTabIndex, newTabIndex, callback);
 					}
 					//  explicitly ask when changing tabs
-					else if (FDialog.ask(curWindowNo, this.getComponent(), "SaveChanges?", curTab.getCommitWarning()))
+					else 
+					{
+						FDialog.ask(curWindowNo, this.getComponent(), "SaveChanges?", curTab.getCommitWarning(), new Callback<Boolean>() {
+
+							@Override
+							public void onCallback(Boolean result) {
+								if (result)
 								{   //  yes we want to save
 									if (!curTab.dataSave(true))
 									{
 										showLastError();
 										//  there is a problem, stop here
-							return false;
+										if (callback != null)
+											callback.onCallback(false);
+										return;
 									}
+									setActiveTab0(oldTabIndex, newTabIndex, callback);
 								}
 								else    //  Don't save
 								{
@@ -1096,19 +1143,40 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 										curTab.dataIgnore();
 									else
 									{
-							return false;
+										if (callback != null)
+											callback.onCallback(false);
+										return;
 									}
-					}
+									setActiveTab0(oldTabIndex, newTabIndex, callback);
-				}
-				else    //  new record, but nothing changed
-					curTab.dataIgnore();
-			}   //  there is a change
 								}
 								
+							}
+						});
+					
+					}
+				}
+				else 
+				{
+					//  new record, but nothing changed
+					curTab.dataIgnore();
+					setActiveTab0(oldTabIndex, newTabIndex, callback);
+				}
+			}   //  there is a change
+			else
+				setActiveTab0(oldTabIndex, newTabIndex, callback);
+		}
+		else
+			setActiveTab0(oldTabIndex, newTabIndex, callback);
+	}
+
+	private void setActiveTab0(int oldTabIndex, int newTabIndex,
+			final Callback<Boolean> callback) {
+		boolean back = false;
 		if (!adTab.updateSelectedIndex(oldTabIndex, newTabIndex))
 		{
 		    FDialog.warn(curWindowNo, "TabSwitchJumpGo", title);
-		    return false;
+		    if (callback != null)
+				callback.onCallback(false);
 		}
 
 		IADTabpanel oldTabpanel = curTabpanel;
@@ -1164,7 +1232,8 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 
 		updateToolbar();
 
-		return true;
+		if (callback != null)
+			callback.onCallback(true);
 	}
 
 	private void updateToolbar()
@@ -1422,13 +1491,37 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
      * refresh all row
      * @param fireEvent
      */
-    public void onRefresh(boolean fireEvent)
+    public void onRefresh(final boolean fireEvent)
     {
-    	onSave(false);
+    	onRefresh(fireEvent, true);
+    }
+    
+    /**
+     * refresh all row
+     * @param fireEvent
+     * @param saveCurrentRow
+     */
+    public void onRefresh(final boolean fireEvent, final boolean saveCurrentRow)
+    {
+    	if (saveCurrentRow)
+    	{
+	    	onSave(false, new Callback<Boolean>() {
+	
+				@Override
+				public void onCallback(Boolean result) {
 					curTab.dataRefreshAll(fireEvent, true);
 			        curTabpanel.dynamicDisplay(0);
 			        focusToActivePanel();
 				}
+			});        
+    	}
+    	else
+    	{
+    		curTab.dataRefreshAll(fireEvent, true);
+	        curTabpanel.dynamicDisplay(0);
+	        focusToActivePanel();
+    	}
+    }
 
     /**
      * @see ToolbarListener#onRefresh()
@@ -1458,10 +1551,11 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
             return;
         }
 
-        if (!autoSave()) {
+        autoSave(new Callback<Boolean>() {
-        	return;
+			@Override
-        }
+			public void onCallback(Boolean result) {
-
+				if (result) 
+				{
 					newRecord = curTab.dataNew(false);
 			        if (newRecord)
 			        {
@@ -1481,22 +1575,23 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 			        }
 			        focusToActivePanel();
 				}				
+			}
+		});        
+    }
 
-    private boolean autoSave() {
+    private void autoSave(Callback<Boolean> callback) {
     	//  has anything changed?
 		if (curTab.needSave(true, false))
 		{   //  do we have real change
 			if (curTab.needSave(true, true))
 			{
-				if (!onSave(false))
+				onSave(false, callback);
-				{
-					return false;
-				}
 			}
 			else    //  new record, but nothing changed
 				curTab.dataIgnore();
 		}   //  there is a change
-		return true;
+		if (callback != null)
+			callback.onCallback(true);
 	}
 
 	// Elaine 2008/11/19
@@ -1540,9 +1635,18 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
         if (curTab == null)
             return;
 
-        if (!onSave(false))
+        onSave(false, new Callback<Boolean>() {
-        	return;
 
+			@Override
+			public void onCallback(Boolean result) {
+				if (result) {
+					doOnFind();
+				}				
+			}
+		});        
+    }
+
+	private void doOnFind() {
 		//  Gets Fields from AD_Field_v
         GridField[] findFields = GridField.createFields(ctx, curTab.getWindowNo(), 0,curTab.getAD_Tab_ID());
         final FindWindow find = new FindWindow (curTab.getWindowNo(), curTab.getName(),
@@ -1556,7 +1660,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
         	return;
         }
         
-        find.addEventListener(DialogEvents.ON_MODAL_CLOSE, new EventListener<Event>() {
+        find.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
 			@Override
 			public void onEvent(Event event) throws Exception {
 				if (!find.isCancel())
@@ -1611,7 +1715,11 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
      */
     public void onSave()
     {
-    	if(onSave(true))
+    	onSave(true, new Callback<Boolean>() {
+			@Override
+			public void onCallback(Boolean result) 
+			{
+				if (result)
 				{
 		    		String statusLine = statusBar.getStatusLine();
 		    		curTab.dataRefreshAll(true, true);
@@ -1619,37 +1727,57 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 		    	}				
 				focusToActivePanel();
 			}
+		});    	    	
+    }
 
     /**
      * @param onSaveEvent
      */
-    private boolean onSave(boolean onSaveEvent)
+    private void onSave(final boolean onSaveEvent, final Callback<Boolean> callback)
     {
-    	boolean newRecord = (curTab.getRecord_ID() <= 0);
+    	final boolean newRecord = (curTab.getRecord_ID() <= 0);
-    	boolean wasChanged = toolbar.isSaveEnable();
+    	final boolean wasChanged = toolbar.isSaveEnable();
     	if (curTab.isSortTab())
     	{
     		((ADSortTab)curTabpanel).saveData();
     		toolbar.enableSave(false);	//	set explicitly
     		toolbar.enableSaveAndCreate(false);
     		toolbar.enableIgnore(false);
-    		return true;
+    		if (callback != null)
+    			callback.onCallback(true);
     	}
     	else
     	{
     		if (onSaveEvent && curTab.getCommitWarning() != null && curTab.getCommitWarning().trim().length() > 0)
     		{
-    			if (!FDialog.ask(curWindowNo, this.getComponent(), "SaveChanges?", curTab.getCommitWarning()))
+    			FDialog.ask(curWindowNo, this.getComponent(), "SaveChanges?", curTab.getCommitWarning(), new Callback<Boolean>() {
+
+					@Override
+					public void onCallback(Boolean result) 
 					{
-    				return false;
+						if (result)
+						{
+							doSave(onSaveEvent, newRecord, wasChanged, callback);
 						}
 					}
+				});
+    		}
+    		else
+    		{
+    			doSave(onSaveEvent, newRecord, wasChanged, callback);
+    		}
+    	}
+    }
+
+	private void doSave(boolean onSaveEvent, boolean newRecord,
+			boolean wasChanged, Callback<Boolean> callback) {
 		boolean retValue = curTab.dataSave(onSaveEvent);
 
 		if (!retValue)
 		{
 			showLastError();
-	            return false;
+			if (callback != null)
+				callback.onCallback(false);
 		} else if (!onSaveEvent) //need manual refresh
 		{
 			curTab.setCurrentRow(curTab.getCurrentRow());
@@ -1690,8 +1818,8 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 		    }
 		}
 
-	        return true;
+		if (callback != null)
-    	}
+			callback.onCallback(true);
 	}
 
 	private void showLastError() {
@@ -1708,13 +1836,19 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 	 */
 	public void onSaveCreate()
     {
-    	boolean retValue = onSave(true);
+    	onSave(true, new Callback<Boolean>() {
-    	if(retValue)
+
+			@Override
+			public void onCallback(Boolean result) 
+			{
+				if(result)
 		    	{
 		    		curTab.dataRefreshAll(true, true);
 		    		onNew();
 		    	}
 			}
+		});    	
+    }
 
     /**
      * @see ToolbarListener#onDelete()
@@ -1726,14 +1860,22 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
             return;
         }
 
-        if (FDialog.ask(curWindowNo, null, "DeleteRecord?"))
+        FDialog.ask(curWindowNo, null, "DeleteRecord?", new Callback<Boolean>() {
+
+			@Override
+			public void onCallback(Boolean result) 
+			{
+				if (result)
 				{
 		        	//error will be catch in the dataStatusChanged event
 		            curTab.dataDelete();
-        }
+		            
 		            curTabpanel.dynamicDisplay(0);
 		            focusToActivePanel();
 				}
+	        }
+		});
+    }
 
     // Elaine 2008/12/01
 	/**
@@ -1874,7 +2016,12 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 		{
 			public void onEvent(Event event) throws Exception
 			{
-				if (FDialog.ask(curWindowNo, messagePanel, "DeleteSelection"))
+				FDialog.ask(curWindowNo, messagePanel, "DeleteSelection", new Callback<Boolean>() {
+
+					@Override
+					public void onCallback(Boolean result) 
+					{
+						if (result)
 						{
 							logger.fine("ok");
 							Set<Listitem> selectedValues = listbox.getSelectedItems();
@@ -1906,6 +2053,9 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 							logger.fine("cancel");
 						}
 					}
+					
+				});		        
+			}
 		});
 		hbox.appendChild(btnOk);
 
@@ -1933,7 +2083,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
      */
 	public void onPrint() {
 		//Get process defined for this tab
-		int AD_Process_ID = curTab.getAD_Process_ID();
+		final int AD_Process_ID = curTab.getAD_Process_ID();
 		//log.info("ID=" + AD_Process_ID);
 
 		//	No report defined
@@ -1944,19 +2094,24 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 			return;
 		}
 
-		if (!onSave(false))
+		onSave(false, new Callback<Boolean>() {
-			return;
+			@Override
+			public void onCallback(Boolean result) {
+				if (result) {
 					//
 					int table_ID = curTab.getAD_Table_ID();
 					int record_ID = curTab.getRecord_ID();
 
-		ProcessModalDialog dialog = new ProcessModalDialog(this, getWindowNo(), AD_Process_ID,table_ID, record_ID, true);
+					ProcessModalDialog dialog = new ProcessModalDialog(AbstractADWindowPanel.this, getWindowNo(), AD_Process_ID,table_ID, record_ID, true);
 					if (dialog.isValid()) {
 						dialog.setPosition("center");
-			dialog.setPage(this.getComponent().getPage());
+						dialog.setPage(AbstractADWindowPanel.this.getComponent().getPage());
 						dialog.doHighlighted();
 					}
 				}				
+			}
+		});	
+	}
 
 	/**
      * @see ToolbarListener#onReport()
@@ -1968,9 +2123,18 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 			return;
 		}
 
-		if (!onSave(false))
+		onSave(false, new Callback<Boolean>() {
-			return;
 
+			@Override
+			public void onCallback(Boolean result) {
+				if (result) {
+					doOnReport();
+				}				
+			}
+		});
+	}
+
+	private void doOnReport() {
 		//	Query
 		MQuery query = new MQuery(curTab.getTableName());
 		//	Link for detail records
@@ -2005,7 +2169,6 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 		}
 
 		new WReport (curTab.getAD_Table_ID(), query, toolbar.getEvent().getTarget(), curWindowNo, curTab.getWhereExtended());
-
 	}
 
 	/**
@@ -2123,8 +2286,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 
 		logger.info(wButton.toString());
 
-		boolean startWOasking = false;
+		final String col = wButton.getColumnName();
-		String col = wButton.getColumnName();
 
 		//  Zoom
 		if (col.equals("Record_ID"))
@@ -2140,10 +2302,29 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 
 		if (curTab.needSave(true, false))
 		{
-			if (!onSave(false))
+			onSave(false, new Callback<Boolean>() {
-				return;
+				@Override
+				public void onCallback(Boolean result) {
+					if (result) {
+						actionButton0(col, wButton);
+					}					
+				}
+			});
+		}
+		else
+		{
+			actionButton0(col, wButton);
+		}
 	}
 			
+	/**************************************************************************
+	 *	Start Button Process
+	 * @param col 
+	 * @param wButton 
+	 */
+	private void actionButton0 (String col, final WButtonEditor wButton)
+	{
+		boolean startWOasking = false;
 		final int table_ID = curTab.getAD_Table_ID();
 
 		//	Record_ID
@@ -2181,13 +2362,19 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 			if (vp.isInitOK())		//	may not be allowed
 			{
 				vp.setAttribute(Window.MODE_KEY, Window.MODE_HIGHLIGHTED);
-				vp.addEventListener(DialogEvents.ON_MODAL_CLOSE, new EventListener<Event>() {
+				vp.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
 					@Override
 					public void onEvent(Event event) throws Exception {
 						if (vp.needSave())
 						{
-							onSave(false);
+							onSave(false, new Callback<Boolean>() {
-							onRefresh(false);
+
+								@Override
+								public void onCallback(Boolean result) {
+									onRefresh(false, false);
+								}
+								
+							});							
 						}						
 					}
 				});
@@ -2211,7 +2398,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 				final int recordIdParam = record_ID;
 				win.setAttribute(Window.MODE_KEY, Window.MODE_HIGHLIGHTED);
 				win.setPosition("center");			
-				win.addEventListener(DialogEvents.ON_MODAL_CLOSE, new EventListener<Event>() {
+				win.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
 					public void onEvent(Event event) throws Exception {						
 						if (!win.isStartProcess()) {							
 							return;
@@ -2238,7 +2425,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 				{
 					final WCreateFromWindow window = (WCreateFromWindow) cf.getWindow();
 					window.setAttribute(Window.MODE_KEY, Window.MODE_HIGHLIGHTED);
-					window.addEventListener(DialogEvents.ON_MODAL_CLOSE, new EventListener<Event>() {
+					window.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
 						@Override
 						public void onEvent(Event event) throws Exception {
 							if (!window.isCancel()) {
@@ -2288,7 +2475,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 			}
 
 			//  Check Post Status
-			Object ps = curTab.getValue("Posted");
+			final Object ps = curTab.getValue("Posted");
 
 			if (ps != null && ps.equals("Y"))
 			{
@@ -2297,19 +2484,28 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 			}
 			else
 			{
-				if (FDialog.ask(curWindowNo, null, "PostImmediate?"))
+				final int tableIdRef = tableId;
+				final int recordIdRef = recordId;
+				FDialog.ask(curWindowNo, null, "PostImmediate?", new Callback<Boolean>() {
+
+					@Override
+					public void onCallback(Boolean result) 
+					{
+						if (result)
 						{
 							boolean force = ps != null && !ps.equals ("N");		//	force when problems
 
 							String error = AEnv.postImmediate (curWindowNo, Env.getAD_Client_ID(ctx),
-						tableId, recordId, force);
+								tableIdRef, recordIdRef, force);
 
 							if (error != null)
 								statusBar.setStatusLine(error, true, true);
 
-					onRefresh(false);
+							onRefresh(false, false);
 						}						
 					}
+				});
+			}
 			return;
 		}   //  Posted
 
@@ -2318,7 +2514,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 	} // actionButton
 
 	private void executeButtonProcess(final WButtonEditor wButton,
-			boolean startWOasking, int table_ID, int record_ID,
+			final boolean startWOasking, final int table_ID, final int record_ID,
 			boolean isProcessMandatory) {
 		/**
 		 *  Start Process ----
@@ -2339,10 +2535,24 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 
 		if (curTab.needSave(true, false))
 		{
-			if (!onSave(false))
+			onSave(false, new Callback<Boolean>() {
-				return;
+
+				@Override
+				public void onCallback(Boolean result) {
+					if (result) {
+						executeButtonProcess0(wButton, startWOasking, table_ID, record_ID);
+					}					
+				}
+			}); 
+		}
+		else
+		{
+			executeButtonProcess0(wButton, startWOasking, table_ID, record_ID);
+		}
 	}
 
+	private void executeButtonProcess0(final WButtonEditor wButton,
+			boolean startWOasking, int table_ID, int record_ID) {
 		// call form
 		MProcess pr = new MProcess(ctx, wButton.getProcess_ID(), null);
 		int adFormID = pr.getAD_Form_ID();
@@ -2359,7 +2569,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 			form.setAttribute(Window.MODE_KEY, Window.MODE_EMBEDDED);
 			form.setAttribute(Window.INSERT_POSITION_KEY, Window.INSERT_NEXT);
 			SessionManager.getAppDesktop().showWindow(form);
-			onRefresh(false);
+			onRefresh(false, false);
 		}
 		else
 		{
@@ -2375,7 +2585,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 			}
 			else
 			{
-				onRefresh(false);
+				onRefresh(false, false);
 			}			
 		}
 	}
@@ -2518,7 +2728,7 @@ public abstract class AbstractADWindowPanel extends AbstractUIPart implements To
 	public void onCustomize() {
 		ADTabpanel tabPanel = (ADTabpanel) getADTab().getSelectedTabpanel();
 		Columns columns = tabPanel.getGridView().getListbox().getColumns();
-		List columnList = columns.getChildren();
+		List<Component> columnList = columns.getChildren();
 		GridField[] fields = tabPanel.getGridView().getFields();
 		Map<Integer, String> columnsWidth = new HashMap<Integer, String>();
 		ArrayList<Integer> gridFieldIds = new ArrayList<Integer>();

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/panel/InfoPanel.java

@@ -271,7 +271,7 @@ public abstract class InfoPanel extends Window implements EventListener, WTableM
 	{
 		if (isLookup())
 		{
-			setAttribute(Window.MODE_KEY, Window.MODE_MODAL);
+			setAttribute(Window.MODE_KEY, Window.MODE_HIGHLIGHTED);
 			setBorder("normal");
 			setClosable(true);
 			int height = SessionManager.getAppDesktop().getClientInfo().desktopHeight * 85 / 100;

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/panel/InfoProductPanel.java

@@ -61,6 +61,7 @@ import org.adempiere.webui.component.Tabpanels;
 import org.adempiere.webui.component.Tabs;
 import org.adempiere.webui.component.Textbox;
 import org.adempiere.webui.component.WListbox;
+import org.adempiere.webui.event.DialogEvents;
 import org.adempiere.webui.session.SessionManager;
 import org.compiere.minigrid.ColumnInfo;
 import org.compiere.minigrid.IDColumn;
@@ -1119,13 +1120,20 @@ public class InfoProductPanel extends InfoPanel implements EventListener
 	 */
 	private void cmd_InfoPAttribute()
 	{
-		InfoPAttributePanel ia = new InfoPAttributePanel(this);
+		final InfoPAttributePanel ia = new InfoPAttributePanel(this);
+		ia.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
+
+			@Override
+			public void onEvent(Event event) throws Exception {
 				m_pAttributeWhere = ia.getWhereClause();
 				if (m_pAttributeWhere != null)
 				{
 					executeQuery();
 					renderItems();
 				}
+			}
+		});
+		
 	}	//	cmdInfoAttribute
 
 	/**
@@ -1375,12 +1383,19 @@ public class InfoProductPanel extends InfoPanel implements EventListener
 				M_Warehouse_ID = ((Integer)warehouse.getValue()).intValue();
 
 			String title = warehouse.getLabel() + " - " + productName;
-			InfoPAttributeInstancePanel pai = new InfoPAttributeInstancePanel(this, title,
+			final InfoPAttributeInstancePanel pai = new InfoPAttributeInstancePanel(this, title,
 				M_Warehouse_ID, 0, productInteger.intValue(), m_C_BPartner_ID);
+			pai.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
+
+				@Override
+				public void onEvent(Event event) throws Exception {
 					m_M_AttributeSetInstance_ID = pai.getM_AttributeSetInstance_ID();
 					m_M_Locator_ID = pai.getM_Locator_ID();
 					if (m_M_AttributeSetInstance_ID != -1)
 						dispose(true);
+				}
+			});
+			
 			return;
 		}
 		//

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/panel/WAttachment.java

@@ -24,6 +24,8 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.logging.Level;
 
+import org.adempiere.util.Callback;
+import org.adempiere.webui.AdempiereWebUI;
 import org.adempiere.webui.apps.AEnv;
 import org.adempiere.webui.component.Button;
 import org.adempiere.webui.component.Label;
@@ -32,6 +34,7 @@ import org.adempiere.webui.component.Listbox;
 import org.adempiere.webui.component.Panel;
 import org.adempiere.webui.component.Textbox;
 import org.adempiere.webui.component.Window;
+import org.adempiere.webui.event.DialogEvents;
 import org.adempiere.webui.window.FDialog;
 import org.compiere.model.MAttachment;
 import org.compiere.model.MAttachmentEntry;
@@ -42,9 +45,11 @@ import org.zkoss.util.media.AMedia;
 import org.zkoss.util.media.Media;
 import org.zkoss.zk.au.out.AuScript;
 import org.zkoss.zk.au.out.AuEcho;
+import org.zkoss.zk.ui.Page;
 import org.zkoss.zk.ui.event.Event;
 import org.zkoss.zk.ui.event.EventListener;
 import org.zkoss.zk.ui.event.Events;
+import org.zkoss.zk.ui.event.UploadEvent;
 import org.zkoss.zk.ui.util.Clients;
 import org.zkoss.zul.Borderlayout;
 import org.zkoss.zul.Center;
@@ -61,7 +66,7 @@ import org.zkoss.zul.Iframe;
  * @author Low Heng Sin
  *
  */
-public class WAttachment extends Window implements EventListener
+public class WAttachment extends Window implements EventListener<Event>
 {
 	/**
 	 * generated serial version Id
@@ -128,12 +133,32 @@ public class WAttachment extends Window implements EventListener
 
 	public WAttachment(	int WindowNo, int AD_Attachment_ID,
 						int AD_Table_ID, int Record_ID, String trxName)
+	{
+		this(WindowNo, AD_Attachment_ID, AD_Table_ID, Record_ID, trxName, (EventListener<Event>)null);
+	}
+	
+	/**
+	 *	Constructor.
+	 *	loads Attachment, if ID <> 0
+	 *  @param WindowNo window no
+	 *  @param AD_Attachment_ID attachment
+	 *  @param AD_Table_ID table
+	 *  @param Record_ID record key
+	 *  @param trxName transaction
+	 */
+
+	public WAttachment(	int WindowNo, int AD_Attachment_ID,
+						int AD_Table_ID, int Record_ID, String trxName, EventListener<Event> eventListener)
 	{
 		super();
 
 		log.config("ID=" + AD_Attachment_ID + ", Table=" + AD_Table_ID + ", Record=" + Record_ID);
 
 		m_WindowNo = WindowNo;
+		if (eventListener != null) 
+		{
+			this.addEventListener(DialogEvents.ON_WINDOW_CLOSE, eventListener);
+		}
 		
 		try
 		{
@@ -165,7 +190,7 @@ public class WAttachment extends Window implements EventListener
 			}
 
 			//enter modal
-			doModal();
+			doHighlighted();
 		}
 		catch (Exception e)
 		{
@@ -268,6 +293,8 @@ public class WAttachment extends Window implements EventListener
 		confirmPanel.appendChild(bOk);
 
 		text.setTooltiptext(Msg.getElement(Env.getCtx(), "TextMsg"));
+		
+		this.addEventListener(Events.ON_UPLOAD, this);
 	}
 
 	/**
@@ -498,6 +525,11 @@ public class WAttachment extends Window implements EventListener
 
 		else if (e.getTarget() == bRefresh)
 			displayData(cbContent.getSelectedIndex(), true);
+		else if (e instanceof UploadEvent) 
+		{
+			UploadEvent ue = (UploadEvent) e;
+			processUploadMedia(ue.getMedia());
+		}
 
 	}	//	onEvent
 
@@ -511,10 +543,12 @@ public class WAttachment extends Window implements EventListener
 
 		preview.setVisible(false);
 
-		Media media = null;
+		Media media = Fileupload.get(true);
-
+		if (AdempiereWebUI.isEventThreadEnabled())
-		media = Fileupload.get(true);
+			processUploadMedia(media);
+	}
 
+	private void processUploadMedia(Media media) {
 		if (media != null)
 		{
 //				pdfViewer.setContent(media);
@@ -554,7 +588,7 @@ public class WAttachment extends Window implements EventListener
 			clearPreview();
 			m_change = true;
 		}
-	}	//	getFileName
+	}
 
 	private byte[] getMediaData(Media media) {
 		byte[] bytes = null;
@@ -586,8 +620,17 @@ public class WAttachment extends Window implements EventListener
 	{
 		log.info("");
 
-		if (FDialog.ask(m_WindowNo, this, "AttachmentDelete?"))
+		FDialog.ask(m_WindowNo, this, "AttachmentDelete?", new Callback<Boolean>() {
+			
+			@Override
+			public void onCallback(Boolean result) 
+			{
+				if (result)
+				{
 					m_attachment.delete(true);
+				}					
+			}
+		});			
 	}	//	deleteAttachment
 
 	/**
@@ -598,19 +641,26 @@ public class WAttachment extends Window implements EventListener
 	{
 		log.info("");
 
-		int index = cbContent.getSelectedIndex();
+		final int index = cbContent.getSelectedIndex();
 		String fileName = getFileName(index);
 
 		if (fileName == null)
 			return;
 
-		if (FDialog.ask(m_WindowNo, this, "AttachmentDeleteEntry?"))
+		FDialog.ask(m_WindowNo, this, "AttachmentDeleteEntry?", new Callback<Boolean>() {
+
+			@Override
+			public void onCallback(Boolean result) 
+			{
+				if (result)
 				{
 					if (m_attachment.deleteEntry(index))
 						cbContent.removeItemAt(index);
 
 					m_change = true;
 				}				
+			}
+		});		
 	}	//	deleteAttachment
 
 	/**
@@ -639,5 +689,4 @@ public class WAttachment extends Window implements EventListener
 			}
 		}
 	}	//	saveAttachmentToFile
-
 }

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/panel/WDocActionPanel.java

@@ -90,9 +90,6 @@ public class WDocActionPanel extends Window implements EventListener<Event>, Dia
 		dynInit();
 
 		init();
-		this.setAttribute("mode","modal");
-
-
 	}
 
 	/**
@@ -300,13 +297,11 @@ public class WDocActionPanel extends Window implements EventListener<Event>, Dia
 				m_OKpressed = true;
 				setValue();
 				this.detach();
-				Events.sendEvent(this, new Event(ON_MODAL_CLOSE, this, null));
 			}
 			else if (confirmPanel.getButton("Cancel").equals(event.getTarget()))
 			{
 				m_OKpressed = false;
 				this.detach();
-				Events.sendEvent(this, new Event(ON_MODAL_CLOSE, this, null));
 			}			
 		}
 		else if (Events.ON_SELECT.equals(event.getName()))

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/panel/WOnlyCurrentDays.java

@@ -146,10 +146,4 @@ public class WOnlyCurrentDays extends Window implements EventListener<Event>, Di
 		
 		this.detach();
 	}
-
-	@Override
-	public void detach() {
-		super.detach();
-		Events.sendEvent(this, new Event(ON_MODAL_CLOSE, this, null));
-	}
 }

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/FDialog.java

@@ -134,16 +134,8 @@ public class FDialog
     		newTitle = title;
     	}
     	
-		try
-		{
 		String s = out.toString().replace("\n", "<br>");
 		Messagebox.showDialog(s, newTitle, Messagebox.OK, Messagebox.EXCLAMATION);
-		}
-		catch (InterruptedException exception)
-		{
-			// Restore the interrupted status
-            Thread.currentThread().interrupt();
-		}
 
 		return;
     }
@@ -233,16 +225,8 @@ public class FDialog
 
 		out = constructMessage(adMessage, message);
 		
-		try
-		{
 		String s = out.toString().replace("\n", "<br>");
 		Messagebox.showDialog(s, AEnv.getDialogHeader(ctx, windowNo), Messagebox.OK, Messagebox.ERROR);
-		}
-		catch (InterruptedException exception)
-		{
-			// Restore the interrupted status
-            Thread.currentThread().interrupt();
-		}
 		
 		return;
     }
@@ -258,6 +242,21 @@ public class FDialog
 	 *	@return true, if OK
 	 */    
     public static boolean ask(int windowNo, Component comp, String adMessage, String msg)
+    {
+    	return ask(windowNo, comp, adMessage, msg, (Callback<Boolean>)null);
+    }
+    
+    /**************************************************************************
+	 *	Ask Question with question icon and (OK) (Cancel) buttons
+	 *
+	 *	@param	WindowNo	Number of Window
+	 *  @param  c           Container (owner)
+	 *	@param	AD_Message	Message to be translated
+	 *	@param	msg			Additional clear text message
+	 *
+	 *	@return true, if OK
+	 */    
+    public static boolean ask(int windowNo, Component comp, String adMessage, String msg, Callback<Boolean> callback)
     {
     	StringBuffer out = new StringBuffer();
 		if (adMessage != null && !adMessage.equals(""))
@@ -265,7 +264,7 @@ public class FDialog
 		if (msg != null && msg.length() > 0)
 			out.append("\n").append(msg);
 		String s = out.toString().replace("\n", "<br>");
-		return ask(windowNo, comp, s);
+		return ask(windowNo, comp, s, callback);
     }
     
     /**************************************************************************
@@ -280,7 +279,7 @@ public class FDialog
     
     public static boolean ask(int windowNo, Component comp, String adMessage)
     {
-    	return ask(windowNo, comp, adMessage, (Callback<String>)null);
+    	return ask(windowNo, comp, adMessage, (Callback<Boolean>)null);
     }
     
 	/**************************************************************************
@@ -293,24 +292,25 @@ public class FDialog
 	 *	@return true, if OK
 	 */
     
-    public static boolean ask(int windowNo, Component comp, String adMessage, Callback<String> callback)
+    public static boolean ask(int windowNo, Component comp, String adMessage, final Callback<Boolean> callback)
     {
-        try
+    	Callback<Integer> msgCallback = null;
+    	if (callback != null) 
     	{
+    		msgCallback = new Callback<Integer>() {
+				@Override
+				public void onCallback(Integer result) {
+					boolean b = result != null && result.intValue() == Messagebox.OK;
+					callback.onCallback(b);
+				}
+			};
+    	}
     	String s = Msg.getMsg(Env.getCtx(), adMessage).replace("\n", "<br>");
         int response = Messagebox.showDialog(s, AEnv.getDialogHeader(Env.getCtx(), windowNo), 
-            		Messagebox.OK | Messagebox.CANCEL, Messagebox.QUESTION, callback);
+        		Messagebox.OK | Messagebox.CANCEL, Messagebox.QUESTION, msgCallback, (msgCallback == null));
 
         return (response == Messagebox.OK);
     }
-        catch (InterruptedException ex)
-        {
-			// Restore the interrupted status
-            Thread.currentThread().interrupt();
-        }
-    	
-        return true;
-    }
     
     /**
      *  Display information with information icon.
@@ -356,16 +356,8 @@ public class FDialog
 
         out = constructMessage(adMessage, message);
 
-        try
-        {
     	String s = out.toString().replace("\n", "<br>");
     	Messagebox.showDialog(s, AEnv.getDialogHeader(ctx, windowNo), Messagebox.OK, Messagebox.INFORMATION);
-        }
-        catch (InterruptedException exception)
-        {
-            // Restore the interrupted status
-            Thread.currentThread().interrupt();
-        }
         
         return;
     }

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/FindWindow.java

@@ -1326,7 +1326,6 @@ public class FindWindow extends Window implements EventListener<Event>, ValueCha
         super.dispose();
         
         isvalid = false;
-        Events.sendEvent(this, new Event(ON_MODAL_CLOSE, this, null));
     }   //  dispose
 
     /**

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/WAccountDialog.java

@@ -21,6 +21,7 @@ import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.util.logging.Level;
 
+import org.adempiere.util.Callback;
 import org.adempiere.webui.apps.AEnv;
 import org.adempiere.webui.component.ConfirmPanel;
 import org.adempiere.webui.component.Grid;
@@ -54,6 +55,7 @@ import org.compiere.util.DB;
 import org.compiere.util.Env;
 import org.compiere.util.Msg;
 import org.zkoss.zk.ui.Executions;
+import org.zkoss.zk.ui.Page;
 import org.zkoss.zk.ui.event.Event;
 import org.zkoss.zk.ui.event.EventListener;
 import org.zkoss.zk.ui.event.Events;
@@ -77,6 +79,7 @@ public final class WAccountDialog extends Window
 {
 
 	private static final long serialVersionUID = 7999516267209766287L;
+	private Callback<Integer> m_callback;
 
 	/**
 	 * 	Constructor
@@ -85,7 +88,7 @@ public final class WAccountDialog extends Window
 	 *  @param C_AcctSchema_ID as
 	 */
 	public WAccountDialog (String title,
-		MAccountLookup mAccount, int C_AcctSchema_ID)
+		MAccountLookup mAccount, int C_AcctSchema_ID, Callback<Integer> callback)
 	{
 		super ();
 		this.setTitle(title);
@@ -96,6 +99,7 @@ public final class WAccountDialog extends Window
 			+ ", C_ValidCombination_ID=" + mAccount.C_ValidCombination_ID);
 		m_mAccount = mAccount;
 		m_C_AcctSchema_ID = C_AcctSchema_ID;
+		m_callback = callback;
 		m_WindowNo = SessionManager.getAppDesktop().registerWindow(this);
 		try
 		{
@@ -242,7 +246,6 @@ public final class WAccountDialog extends Window
 
 		this.setBorder("normal");
 		this.setClosable(false);
-		this.setAttribute("modal", Boolean.TRUE);
 
 		this.setSizable(true);
 	}	//	jbInit
@@ -581,6 +584,18 @@ public final class WAccountDialog extends Window
 		this.onClose();
 	}	//	dispose
 
+	
+	/* (non-Javadoc)
+	 * @see org.adempiere.webui.component.Window#onPageDetached(org.zkoss.zk.ui.Page)
+	 */
+	@Override
+	public void onPageDetached(Page page) {
+		super.onPageDetached(page);
+		if (m_callback != null) {
+			m_callback.onCallback(getValue());
+		}
+	}
+
 	/**
 	 *	Save Selection
 	 */

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/WChat.java

@@ -351,9 +351,4 @@ public class WChat extends Window implements EventListener<Event>, DialogEvents
 		actionPerformed(event);
 	}
 
-	@Override
-	public void detach() {
-		super.detach();
-		Events.sendEvent(this, new Event(ON_MODAL_CLOSE, this, null));
-	}
 }	//	AChat

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/WImageDialog.java

@@ -19,6 +19,7 @@ package org.adempiere.webui.window;
 import java.io.InputStream;
 import java.util.logging.Level;
 
+import org.adempiere.webui.AdempiereWebUI;
 import org.adempiere.webui.apps.AEnv;
 import org.adempiere.webui.component.Button;
 import org.adempiere.webui.component.ConfirmPanel;
@@ -34,6 +35,7 @@ import org.zkoss.util.media.Media;
 import org.zkoss.zk.ui.event.Event;
 import org.zkoss.zk.ui.event.EventListener;
 import org.zkoss.zk.ui.event.Events;
+import org.zkoss.zk.ui.event.UploadEvent;
 import org.zkoss.zul.Borderlayout;
 import org.zkoss.zul.Center;
 import org.zkoss.zul.North;
@@ -50,7 +52,7 @@ import org.zkoss.zul.Separator;
  *  @author Low Heng Sin 
  *  
  */
-public class WImageDialog extends Window implements EventListener
+public class WImageDialog extends Window implements EventListener<Event>
 {
 	/**
 	 * 
@@ -148,12 +150,20 @@ public class WImageDialog extends Window implements EventListener
 		//
 		fileButton.addEventListener(Events.ON_CLICK, this);
 		confirmPanel.addActionListener(Events.ON_CLICK, this);
+		
+		addEventListener(Events.ON_UPLOAD, this);
 	}   //  init
 
 	public void onEvent(Event e) throws Exception {
-		if (e.getTarget() == fileButton)
+		if (e instanceof UploadEvent) 
+		{
+			UploadEvent ue = (UploadEvent) e;
+			processUploadMedia(ue.getMedia());
+		}
+		else if (e.getTarget() == fileButton)
+		{
 			cmd_file();
-
+		}
 		else if (e.getTarget().getId().equals(ConfirmPanel.A_OK))
 		{
 			if (image.getContent() != null)
@@ -192,10 +202,12 @@ public class WImageDialog extends Window implements EventListener
 	private void cmd_file()
 	{
 		//  Show File Open Dialog
-		Media imageFile = null;
+		Media media = Fileupload.get();
-		
+		if (AdempiereWebUI.isEventThreadEnabled())
-		imageFile = Fileupload.get(); 
+			processUploadMedia(media);
+	}   //  cmd_file
 
+	private void processUploadMedia(Media imageFile) {
 		if (imageFile == null)
 			return;
 
@@ -230,7 +242,7 @@ public class WImageDialog extends Window implements EventListener
 			m_mImage.setBinaryData(image.getContent().getByteData());
 		else
 			m_mImage.setBinaryData(null);
-	}   //  cmd_file
+	}
 
 	/**
 	 * 	Get Image ID

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/WMediaDialog.java

@@ -21,6 +21,7 @@ import java.sql.Clob;
 import java.sql.SQLException;
 import java.util.logging.Level;
 
+import org.adempiere.webui.AdempiereWebUI;
 import org.adempiere.webui.apps.AEnv;
 import org.adempiere.webui.component.Button;
 import org.adempiere.webui.component.Panel;
@@ -33,6 +34,7 @@ import org.zkoss.util.media.Media;
 import org.zkoss.zk.ui.event.Event;
 import org.zkoss.zk.ui.event.EventListener;
 import org.zkoss.zk.ui.event.Events;
+import org.zkoss.zk.ui.event.UploadEvent;
 import org.zkoss.zul.Borderlayout;
 import org.zkoss.zul.Center;
 import org.zkoss.zul.North;
@@ -47,7 +49,7 @@ import org.zkoss.zul.Iframe;
  * @author Low Heng Sin
  *
  */
-public class WMediaDialog extends Window implements EventListener
+public class WMediaDialog extends Window implements EventListener<Event>
 {
 	/**
 	 * 
@@ -186,6 +188,8 @@ public class WMediaDialog extends Window implements EventListener
 		
 		confirmPanel.appendChild(bCancel);
 		confirmPanel.appendChild(bOk);
+		
+		addEventListener(Events.ON_UPLOAD, this);
 	}
 	
 	/**
@@ -307,6 +311,11 @@ public class WMediaDialog extends Window implements EventListener
 		{
 			save();
 		}
+		else if (e instanceof UploadEvent)
+		{
+			UploadEvent ue = (UploadEvent) e;
+			processUploadMedia(ue.getMedia());
+		}
 	}	//	onEvent
 	
 	/**************************************************************************
@@ -315,12 +324,12 @@ public class WMediaDialog extends Window implements EventListener
 	
 	private void loadFile()
 	{
-		log.info("");
+		Media media = Fileupload.get();
-		
+		if (AdempiereWebUI.isEventThreadEnabled())
-		Media media = null;
+			processUploadMedia(media);
-		
+	}	//	getFileName
-		media = Fileupload.get(); 
 
+	private void processUploadMedia(Media media) {
 		if (media == null)
 			return;
 	
@@ -330,8 +339,7 @@ public class WMediaDialog extends Window implements EventListener
 		m_change = true;
 		m_data = media.getByteData();
 		displayData();
-		
+	}
-	}	//	getFileName
 
 	/**
 	 *	download

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/WPAttributeDialog.java

@@ -39,6 +39,7 @@ import org.adempiere.webui.component.Row;
 import org.adempiere.webui.component.Rows;
 import org.adempiere.webui.component.Textbox;
 import org.adempiere.webui.component.Window;
+import org.adempiere.webui.event.DialogEvents;
 import org.adempiere.webui.session.SessionManager;
 import org.compiere.model.MAttribute;
 import org.compiere.model.MAttributeInstance;
@@ -101,7 +102,6 @@ public class WPAttributeDialog extends Window implements EventListener, SystemID
 	{
 		super ();
 		this.setTitle(Msg.translate(Env.getCtx(), "M_AttributeSetInstance_ID"));
-		this.setAttribute("modal", Boolean.TRUE);
 		this.setBorder("normal");
 		this.setWidth("500px");
 		this.setHeight("600px");
@@ -627,8 +627,7 @@ public class WPAttributeDialog extends Window implements EventListener, SystemID
 		//	Select Instance
 		if (e.getTarget() == bSelect)
 		{
-			if (cmd_select())
+			cmd_select();				
-				dispose();
 		}
 		//	New/Edit
 		else if (e.getTarget() == cbNewEdit)
@@ -778,7 +777,7 @@ public class WPAttributeDialog extends Window implements EventListener, SystemID
 	 * 	Instance Selection Button
 	 * 	@return true if selected
 	 */
-	private boolean cmd_select()
+	private void cmd_select()
 	{
 		log.config("");
 		
@@ -826,17 +825,22 @@ public class WPAttributeDialog extends Window implements EventListener, SystemID
 			rs = null; pstmt = null;
 		}
 		//		
-		WPAttributeInstance pai = new WPAttributeInstance(title, 
+		final WPAttributeInstance pai = new WPAttributeInstance(title, 
 			M_Warehouse_ID, M_Locator_ID, m_M_Product_ID, m_C_BPartner_ID);
+		pai.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
+
+			@Override
+			public void onEvent(Event event) throws Exception {
 				if (pai.getM_AttributeSetInstance_ID() != -1)
 				{
 					m_M_AttributeSetInstance_ID = pai.getM_AttributeSetInstance_ID();
 					m_M_AttributeSetInstanceName = pai.getM_AttributeSetInstanceName();
 					m_M_Locator_ID = pai.getM_Locator_ID();
 					m_changed = true;
-			return true;
+					dispose();
 				}				
-		return false;
+			}
+		});		
 	}	//	cmd_select
 
 	/**

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/WPAttributeInstance.java

@@ -70,7 +70,6 @@ public class WPAttributeInstance extends Window implements EventListener
 	{
 		super ();
 		this.setTitle(Msg.getMsg(Env.getCtx(), "PAttributeInstance") + title);
-		this.setAttribute("modal", Boolean.TRUE);
 		this.setBorder("normal");
 		this.setWidth("500px");
 		this.setHeight("550px");

org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/ZkReportViewer.java

@@ -1039,7 +1039,7 @@ public class ZkReportViewer extends Window implements EventListener<Event>, ITab
             if (!find.isValid())
             	return;
             
-            find.addEventListener(DialogEvents.ON_MODAL_CLOSE, new EventListener<Event>() {
+            find.addEventListener(DialogEvents.ON_WINDOW_CLOSE, new EventListener<Event>() {
 				@Override
 				public void onEvent(Event event) throws Exception {
 					if (!find.isCancel())

org.adempiere.ui.zk/WEB-INF/zk.xml

@@ -56,7 +56,7 @@
 	</device-config>
 
 	<system-config>
-		<disable-event-thread>false</disable-event-thread>
+		<disable-event-thread>true</disable-event-thread>
 	</system-config>
 
     <!-- Configure the progress message to show in the center -->