How do you close a dragged applet, as Stage.close() doesn't work?

Question

I'm trying to implement a close button in a draggable applet, but Stage.close() doesn't work, and there's an odd little "X" icon which is causing me problems...
My starting point and example is the simple draggable applet from the API documentation. It's the code listed under "User-Specified Close Example":
http://java.sun.com/javafx/1.2/docs/api/javafx.stage/javafx.stage.AppletStageExtension.html
import javafx.scene.*;
import javafx.scene.input.MouseEvent;
import javafx.scene.paint.*;
import javafx.scene.shape.*;
import javafx.scene.text.*;
import javafx.stage.*;
var textContent = "Click the box to return to the browser";
var outside: Boolean = false;
var s: Stage = Stage {
    title: "AppDeploy Demo"
    width : 300 height : 200
    style: StageStyle.TRANSPARENT
    opacity: 0.5
    scene : Scene {
            content: [
                Text { content: bind textContent 
                       x: 25 y:35 fill: Color.BLACK
                       font: Font{size: 24}
                Rectangle { x: 100 y: 100 width: 100 height: 100 fill: Color.RED
                            onMouseClicked: function(e: MouseEvent): Void {
                                s.close();
    extensions: [
        AppletStageExtension {
            shouldDragStart: function(e: MouseEvent): Boolean {
                return e.shiftDown and e.primaryButtonDown;
            useDefaultClose: false
}However, the Stage.close() function in the user code doesn't seem to close the applet once it's dragged. It seems this can only be achieved by a mysterious little "X" in a box top right, acting as a close button.
Here's a demonstration of the problem once you've compiled that code:
1. Open browser with applet (I'm using IE8 on Windows XP)
2. Shift-drag the applet out of the browser. Notice the little X in a box appears when you drop the applet on the desktop.
3. Click the red rectangle to invoke the Stage.close() function in the user code.
4. Applet disappears from screen and does not reappear in the browser.
5. But minimising all the icons on the desktop shows the little X in a box is still there sitting on your desktop (actually I find the X has gone, but the box is still there). This suggests the applet is still running.
6. Close the browser. The little X's box is still on the desktop.
7. After a short pause a Java dialog box appears: "Desktop integration warning. The application would like to create shortcuts. Do you want to continue? OK/Skip" The applet wasn't closed, it is still running!
8. Click Skip. Dialog box disappears. But the little X's box is still on the desktop. Is the applet still running?
9. Try to recompile app again into a deployable Jar (I'm using Eclipse for this).
10. The compiler stops with "ERROR: Jar file C:\[...].jar could not be deleted. The Jar is probably locked by running application, Web browser, emulator or antivirus. Please check that all windows related to the application have been closed." Yes, the applet Jar is still being used.
11. Minimise all the windows. The little X's box is still on the desktop.
12. Click the little X's box.
13. After a few seconds the box disappears. Does this mean the applet is no longer in use...?
14. Recompile the app again into a deployable Jar. It works!
By the way, you get the same experience with another Sun sample: the DraggableMP3Player at
http://javafx.com/samples/DraggableMP3Player/index.html
That, too, thinks it's implementing it's own close button, and again the same problem occurs.
So it seems Stage.close() doesn't properly close the applet, and only the the little X in a box will do this.
I'd like to be able to really close the applet from my own code. How can I do this?
Many thanks
Nik
Edited by: nik.silver on Aug 6, 2009 12:48 PM

Answer 1

After double tap home button, swipe up on the app card that appears above the icon.