CODEWITHSUNDEEP
javaeclipseeventskeyboardswt
paul
paul

Reputation: 13536

How to post an SWT key event containing just a keyboard character (no modifiers)?

Is it possible to post a Key event which contains the character as it should be received by the focused widget?

I want to make a simple pop-up keyboard which generates Key events and I would like to make the pop-up keyboard completely independent of the physical keyboard regarding key mapping.

What I currently see is, that when I set the character to '(' without generating shift events, I get an '8' (I have a German keyboard where '(' is Shift+8). I assume that on a different keyboard the '(' will appear as something else again.

Is there any way to by-pass the mapping?

My current code:

private void postKey(Key key) {
    if(shift) {
        Event ke = new Event();
        ke.type = SWT.KeyDown;
        ke.keyCode = SWT.SHIFT;
        refWidget.getDisplay().post(ke);
    }

    Event ke = new Event();
    ke.type = SWT.KeyDown;
    ke.character = shift ? key.shifted[0] : key.normal[0];
    refWidget.getDisplay().post(ke);

    ke.type = SWT.KeyUp;
    refWidget.getDisplay().post(ke);

    if(shift) {
        Event ev = new Event();
        ev.type = SWT.KeyUp;
        ev.keyCode = SWT.SHIFT;
        refWidget.getDisplay().post(ev);
    }
}

Upvotes: 1

Views: 1906

Answers (1)

Rüdiger Herrmann
Rüdiger Herrmann

Reputation: 20985

The SWTBot wiki has a page on keyboard layouts.

If you stick with Display-post(), then you need to know the current keyboard layout and map keys to characters (shift + 8 -> '('), like you already observed. You migh be able to re-use or adopt the relevant classes from SWTBot (SWTKeyboardStrategy, KeyboardLayout).

As an alternative, the page lists the AWTKeyboardStrategy that uses AWTs Robot to simulate key strokes, that might be worth trying.

As a side note: if you had to post a Shift+x key event you would specify the Shift key in the stateMask like so:

    Event ev = new Event();
    ev.type = SWT.KeyUp;
    ev.stateMask = SWT.SHIFT;
    ev.keyCode = ...

Upvotes: 2

Related Questions