Number Input Dialog
/*******************************************************************************
* All Right Reserved. Copyright (c) 1998, 2004 Jackwind Li Guojie
*
* Created on Mar 18, 2004 1:01:54 AM by JACK $Id$
*
******************************************************************************/
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Dialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class NumberInputDialog extends Dialog {
Double value;
/**
* @param parent
*/
public NumberInputDialog(Shell parent) {
super(parent);
}
/**
* @param parent
* @param style
*/
public NumberInputDialog(Shell parent, int style) {
super(parent, style);
}
/**
* Makes the dialog visible.
*
* @return
*/
public Double open() {
Shell parent = getParent();
final Shell shell =
new Shell(parent, SWT.TITLE | SWT.BORDER | SWT.APPLICATION_MODAL);
shell.setText("NumberInputDialog");
shell.setLayout(new GridLayout(2, true));
Label label = new Label(shell, SWT.NULL);
label.setText("Please enter a valid number:");
final Text text = new Text(shell, SWT.SINGLE | SWT.BORDER);
final Button buttonOK = new Button(shell, SWT.PUSH);
buttonOK.setText("Ok");
buttonOK.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_END));
Button buttonCancel = new Button(shell, SWT.PUSH);
buttonCancel.setText("Cancel");
text.addListener(SWT.Modify, new Listener() {
public void handleEvent(Event event) {
try {
value = new Double(text.getText());
buttonOK.setEnabled(true);
} catch (Exception e) {
buttonOK.setEnabled(false);
}
}
});
buttonOK.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
shell.dispose();
}
});
buttonCancel.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
value = null;
shell.dispose();
}
});
shell.addListener(SWT.Traverse, new Listener() {
public void handleEvent(Event event) {
if(event.detail == SWT.TRAVERSE_ESCAPE)
event.doit = false;
}
});
text.setText("");
shell.pack();
shell.open();
Display display = parent.getDisplay();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
return value;
}
public static void main(String[] args) {
Shell shell = new Shell();
NumberInputDialog dialog = new NumberInputDialog(shell);
System.out.println(dialog.open());
}
}
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