Mnemonics in GWT

Question

I would like to create as Java Swing Mnemonics with GWT . But I don't know how to figure it out. I have googled for it but I didn't fond any sample codes for it . I want to bind some keyboard shortcut keys on my buttons. How can I achieve it ? Any suggestions would be really appreciated !

Answer 1

In general you can handle global keyboard shortcusts using a NativePreviewHandler. An example of this can you see here:

NativePreviewHandler nativePreviewHandler = new NativePreviewHandler() {

    @Override
    public void onPreviewNativeEvent(NativePreviewEvent event) {
        if (event.getTypeInt() != Event.ONKEYDOWN) {
            return;
        }
        final NativeEvent nativeEvent = event.getNativeEvent();
        final boolean altKey = nativeEvent.getAltKey();
        final boolean ctrlKey = nativeEvent.getCtrlKey();
        if(altKey && ctrlKey && nativeEvent.getKeyCode() == 'A') {
            // Do Something
        }
    }
};
Event.addNativePreviewHandler(nativePreviewHandler);

But as far as I klnow, there's no generic way build into GWT to handle some kind of Action that is bound to a button/Menu as well as a keyboard shortcut. You will have to implement such an abstraction by yourselves.