how to listen to ESC key for popup

[aragorn]

My application displays a popup whenevr a particular button is
clicked. Now i can hide the popup whenever the user clicks the mouse
outside of it using the default popup-panel property provided by GWT.
Apart from that I also need to listen to keyboard so that if the user
hits ESC on the keyboard my popup should disappear from the screen.
Any idea how to implement in gwt?

[Hasan Turksoy]

you can override the PopupPanel#onKeydownPreview method like below;

    @Override
    public boolean onKeyDownPreview(char key, int modifiers) {
        // Use the popup's key preview hooks to close the dialog when either
        // enter or escape is pressed.
        switch (key) {
        case KeyboardListener.KEY_ENTER:
        case KeyboardListener.KEY_ESCAPE:
            hide();
            break;
        }

        return true;
    }


Hasan...
http://www.jroller.com/hasant

[sagar]

hey thanks Hasan
it works.
However it is working only for ESC and not for ENTER even though i have used the above lines in my code.

[Hasan Turksoy]

In general, this occurs when another widget other than dialog (which is listening Enter and Esc keys) has got the focus...