Use numberpad keys to invoke calculator

Link to SF Tracker: http://sourceforge.net/support/tracker.php?aid=2967153

client/src/org/compiere/grid/ed/Calculator.java

@@ -301,7 +301,7 @@ public final class Calculator extends CDialog
 		m_decimal = m_format.getDecimalFormatSymbols().getDecimalSeparator();
 
 		//	display start number
-		if (m_number.doubleValue() > 0.00 )
+		if (m_number.doubleValue() != 0.00 )
 		{
 			m_display = m_format.format(m_number);
 			display.setText(m_display);

client/src/org/compiere/grid/ed/MDocNumber.java

@@ -18,6 +18,7 @@ package org.compiere.grid.ed;
 
 import java.text.DecimalFormat;
 import java.text.DecimalFormatSymbols;
+import java.text.ParseException;
 
 import javax.swing.text.AttributeSet;
 import javax.swing.text.BadLocationException;
@@ -151,31 +152,6 @@ public final class MDocNumber extends PlainDocument
 			return;
 		}
 
-		//	Plus - remove minus sign
-		if (c == '+')
-		{
-		//	ADebug.trace(ADebug.l6_Database, "Plus=" + c);
-			//	only positive numbers
-			if (m_displayType == DisplayType.Integer)
-				return;
-			if (content.length() > 0 && content.charAt(0) == '-')
-				super.remove(0, 1);
-		}
-
-		//	Toggle Minus - put minus on start of string
-		else if (c == '-' || c == m_minusSign)
-		{
-		//	ADebug.trace(ADebug.l6_Database, "Minus=" + c);
-			//	no minus possible
-			if (m_displayType == DisplayType.Integer)
-				return;
-			//	remove or add
-			if (content.length() > 0 && content.charAt(0) == '-')
-				super.remove(0, 1);
-			else
-				super.insertString(0, "-", attr);
-		}
-
 		//	Decimal - remove other decimals
 		//	Thousand - treat as Decimal
 		else if (c == m_decimalSeparator || c == m_groupingSeparator || c == '.' || c == ',')
@@ -215,13 +191,30 @@ public final class MDocNumber extends PlainDocument
 		}	//	decimal or thousand
 
 		//	something else
-		else if (VNumber.AUTO_POPUP)
+		else if (VNumber.AUTO_POPUP || "=+-/*".indexOf(c) > -1)
 		{
-			log.fine("Input=" + c + " (" + (int)c + ")");
+			
-			String result = VNumber.startCalculator(m_tc, getText(),
+			//	Minus - put minus on start of string
-				m_format, m_displayType, m_title);
+			if ( c == m_minusSign && offset == 0 )
-			super.remove(0, content.length());
+			{
-			super.insertString(0, result, attr);
+				//	no minus possible
+				if (m_displayType == DisplayType.Integer)
+					return;
+				//	add at start of string
+				else
+					super.insertString(0, "-", attr);
+			}
+			else
+			{
+				log.fine("Input=" + c + " (" + (int)c + ")");
+			
+				String result = VNumber.startCalculator(m_tc, getText(),
+						m_format, m_displayType, m_title, c);
+				super.remove(0, content.length());
+				
+				// insertString(0, result, attr);
+				m_tc.setText(result);
+			}
 		}
 		else
 			ADialog.beep();

client/src/org/compiere/grid/ed/VNumber.java

@@ -558,10 +558,10 @@ public final class VNumber extends JComponent
 			return;
 		}
 
-		if (e.getSource() == m_button)
+		if (e.getSource() == m_button )
 		{
 			m_button.setEnabled(false);
-			String str = startCalculator(this, m_text.getText(), m_format, m_displayType, m_title);
+			String str = startCalculator(this, m_text.getText(), m_format, m_displayType, m_title, ' ');
 			m_text.setText(str);
 			m_button.setEnabled(true);
 			try
@@ -594,6 +594,7 @@ public final class VNumber extends JComponent
 		//  ESC
 		if (e.getKeyCode() == KeyEvent.VK_ESCAPE)
 			m_text.setText(m_initialText);
+		
 		m_modified = true;
 		m_setting = true;
 		try
@@ -693,9 +694,26 @@ public final class VNumber extends JComponent
 	 *  @param displayType display type
 	 *  @param title title
 	 *  @return value
+	 * @deprecated Use {@link #startCalculator(Container,String,DecimalFormat,int,String,char)} instead
 	 */
 	public static String startCalculator(Container jc, String value,
 		DecimalFormat format, int displayType, String title)
+	{
+		return startCalculator(jc, value, format, displayType, title, ' ');
+	}	//	startCalculator
+
+	/**
+	 *	Invalid Entry - Start Calculator
+	 *  @param jc parent
+	 * @param value value
+	 * @param format format
+	 * @param displayType display type
+	 * @param title title
+	 * @param operator optional math operator +-/*
+	 *  @return value
+	 */
+	public static String startCalculator(Container jc, String value,
+		DecimalFormat format, int displayType, String title, char operator)
 	{
 		log.config("Value=" + value);
 		BigDecimal startValue = new BigDecimal(0.0);
@@ -711,12 +729,14 @@ public final class VNumber extends JComponent
 		{
 			log.info("InvalidEntry - " + pe.getMessage());
 		}
-
+		
 		//	Find frame
 		Frame frame = Env.getFrame(jc);
 		//	Actual Call
 		Calculator calc = new Calculator(frame, title,
 			displayType, format, startValue);
+		if ( "*+-/".indexOf(operator) > -1 )
+			calc.handleInput(operator);
 		AEnv.showCenterWindow(frame, calc);
 		BigDecimal result = calc.getNumber();
 		log.config( "Result=" + result);