public void runCalculatorDialog(MouseEvent e) {
if (calculatorDialog == null) {
JFrame frame = null;
Container container = getTopLevelAncestor();
if (container instanceof JFrame) {
frame = (JFrame) container;
}
calculatorDialog = new JDialog(frame, "Rechner", true);
calculator = new Calculator();
calculator.getOKButton().addActionListener(this);
calculatorDialog.getContentPane().add(calculator);
calculatorDialog.pack();
}
// Set calculator's init value
Money money = getValue();
if (money != null) {
calculator.setValue(money.getValue());
} else {
calculator.setValue(0.0);
}
// calculate POP (point of presentation)
Point point = ((JComponent) e.getSource()).getLocationOnScreen();
int x = point.x + e.getX();
int y = point.y + e.getY();
// ensure that it does not exceed the screen limits
Dimension screenDim = Toolkit.getDefaultToolkit().getScreenSize();
Dimension dim = calculatorDialog.getPreferredSize();
if (x + dim.width >= screenDim.width) {
x = screenDim.width - dim.width - 1;
}
if (y + dim.height >= screenDim.height) {
y = screenDim.height - dim.height - 1;
}
// make it visible at wanted location
calculatorDialog.setLocation(x, y);
calculatorDialog.show();
}