Client Canvas

Client Canvas

To realize drawing you can use the Canvas in Tabris and SWT. But sometimes it would be nice to let the user draw something. For this reason, we have created the ClientCanvas. It works like a normal Canvas with the difference that when the user draws, it’s drawn on the Canvas directly. As a result, all drawings are present on the server side object.

Receiving Drawings

In many cases you want to get notified when the user has drawn on the ClientCanvas. For this reason you can register a ClientDrawListener that will get notified when a drawing happens. To see how to register such a listener, take a look at the snippet below:

ClientCanvas canvas = new ClientCanvas( parent, SWT.NONE );
canvas.addClientDrawListener( new ClientDrawListener() {

  @Override
  public void receivedDrawing() {
    // do something
  }
} );

Demo

A simple demo how to use the ClientCanvas can be found on github.