[SOLVED] Textbox KeyPressEventHandler e.Handled = true doesn't work

Hello Takashi,

Keyboard events, like all events in Wisej, are routed to the server asynchronously. The Handled property is useful on the server side when managing the OnKeyDown/Up/Press events to signal that a child has handled the key. However, this has no effect on the client,  unless you actually change the Text property to trigger a client update – I wouldn’t recommend this approach unless really necessary.

If you want to handle keys as they are typed and be able to stop the browser from processing the key you have to do it on the client using the JavaScript provider. It’s quite easy with Wisej. I have attached a sample project for you to use as a reference and a screen shot below of the script editor.

Download the sample

• Drop the JavaScript component on the page or window. This will add the JavaScript and JavaScriptSource property to all controls.
• You can either type the javascript code in JavaScript, or select a .js file in JavaScriptSource.
• The javascript runs in the widget’s context: this = widget, see code above. It runs only once when  the page is loaded or reloaded.

Keeping the script above as a reference, we attach the “keypress” handler and handle the event. To stop it from both bubbling and “defaulting” use e.stop(). Otherwise you can use e.stopBubbling() and e.preventDefault().

When you work directly in javascript we enter the qooxdoo realm. The full API is here: http://demo.qooxdoo.org/current/apiviewer/#qx