GWT pasting event

问题

I want to handle events when user pastes some text in TextBox. Which event is fired in this situation? I tried ValueChange and Change handlers, but they didn't work.

回答1:

This might help you. Describes a workaround to hook to the onpaste event. In short:

• subclass TextBox

• sink the onpaste event in the constructor

  sinkEvents(Event.ONPASTE);

• override onBrowserEvent(Event event)

  public void onBrowserEvent(Event event) {
      super.onBrowserEvent(event);
      switch (event.getTypeInt()) {
          case Event.ONPASTE: {
              // do something here
              break;
          }
      }
  }

回答2:

GWT does not yet have support for cut, copy & paste: http://code.google.com/p/google-web-toolkit/issues/detail?id=4030

Edited: Another option is to use JSNI. For example add this to your GWT class:

public native void addCutHandler(Element element)
    /*-{
        var temp = this;  // hack to hold on to 'this' reference
        element.oncut = function(e) {
            temp.@org.package.YourClass::handleCut()();
        }
    }-*/;

public void handleCut() {
    Window.alert("Cut!");
}

回答3:

**(Write In the Constructor)**

sinkEvents( Event.ONPASTE );   

**(After that write below code)**

public void onBrowserEvent( Event event )
{
    super.onBrowserEvent( event );
    switch ( event.getTypeInt() )
    {
        case Event.ONPASTE :
        {
             event.stopPropagation();
             event.preventDefault();
             break;
        }
    }
}

来源：https://stackoverflow.com/questions/4018118/gwt-pasting-event