Examples of com.google.gwt.user.client.Event

com.google.gwt.user.client.Event
An opaque handle to a native DOM Event. An Event cannot be created directly. Instead, use the Event type when returning a native DOM event from JSNI methods. An Event passed back into JSNI becomes the original DOM event the Event was created from, and can be accessed in JavaScript code as expected. This is typically done by calling methods in the {@link com.google.gwt.user.client.DOM} class.

    if (autoHiders.isEmpty()) {
      return;
    }


    // TODO(danilatos,user,user): Push signal down a layer - clean this up.
    Event event = Event.as(previewEvent.getNativeEvent());
    int lowLevelType = event.getTypeInt();


    // TODO(danilatos): Insert this logic deeply rather than
    // sprinkling it in event handlers. Also the return value
    // of onEventPreview is the reverse of signal handlers.
    SignalEvent signal = SignalEventImpl.create(event, false);
    if (signal == null) {
      return;
    }


    // Key events (excluding escape) and mousewheel events use hideTopmostAutoHiderForKeyEvent
    if (lowLevelType == Event.ONMOUSEWHEEL || signal.isKeyEvent()) {
      if (hideTopmostAutoHiderForKeyEvent(false)) {
        // TODO(user): We don't call previewEvent.cancel() here, since for the floating-buttons
        // menu we want, for example, space-bar to still shift focus to the next blip.
        // The to-do is to audit the previewEvent.cancel call below and see why it's there (and if
        // it's not needed, eliminate it).
        return;
      }
    }


    // Pressing escape at any time causes us to close and discard the event.
    if (signal.getKeySignalType() == KeySignalType.NOEFFECT &&
        event.getKeyCode() == KeyCodes.KEY_ESCAPE) {
      if (hideTopmostAutoHiderForKeyEvent(true)) {
        previewEvent.cancel();
        return;
      }
    }

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   * @return The current event that is being fired. The current event is only
   * available within the lifetime of the onBrowserEvent function. Once the
   * onBrowserEvent method returns, the current event is reset to null.
   */
  public static EventWrapper getCurrentEvent() {
    Event current = DOM.eventGetCurrentEvent();
    return current != null ?
        new EventWrapper(DOM.eventGetCurrentEvent()) : null;
  }

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  protected boolean isExpanded(XElement row) {
    return appearance.isExpanded(row);
  }


  protected void onMouseDown(RowClickEvent event) {
    Event e = event.getEvent();
    XElement target = e.getEventTarget().cast();
    if (appearance.isExpandElement(target)) {
      e.stopPropagation();
      e.preventDefault();
      XElement row = grid.getView().findRow(target).cast();
      toggleRow(row);
    }
  }

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    handlerRegistration = handle.addDomHandler(handler, MouseDownEvent.getType());


    preview = new BaseEventPreview() {
      @Override
      public boolean onPreview(NativePreviewEvent event) {
        Event e = event.getNativeEvent().<Event> cast();
        e.preventDefault();
        switch (event.getTypeInt()) {
          case Event.ONKEYDOWN:
            if (dragging && e.getKeyCode() == KeyCodes.KEY_ESCAPE) {
              cancelDrag();
            }
            break;
          case Event.ONMOUSEMOVE:
            onMouseMove(e);

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    if (event.isCanceled()) {
      return;
    }


    // If the event targets the popup or the partner, consume it
    Event nativeEvent = Event.as(event.getNativeEvent());
    boolean eventTargetsPopupOrPartner = eventTargetsPopup(nativeEvent)
        || eventTargetsPartner(nativeEvent);
    if (eventTargetsPopupOrPartner) {
      event.consume();
    }


    // Cancel the event if it doesn't target the modal popup. Note that the
    // event can be both canceled and consumed.
    if (modal) {
      event.cancel();
    }


    // Switch on the event type
    int type = nativeEvent.getTypeInt();
    switch (type) {
      case Event.ONKEYDOWN: {
        if (!onKeyDownPreview((char) nativeEvent.getKeyCode(),
            KeyboardListenerCollection.getKeyboardModifiers(nativeEvent))) {
          event.cancel();
        }
        return;
      }
      case Event.ONKEYUP: {
        if (!onKeyUpPreview((char) nativeEvent.getKeyCode(),
            KeyboardListenerCollection.getKeyboardModifiers(nativeEvent))) {
          event.cancel();
        }
        return;
      }
      case Event.ONKEYPRESS: {
        if (!onKeyPressPreview((char) nativeEvent.getKeyCode(),
            KeyboardListenerCollection.getKeyboardModifiers(nativeEvent))) {
          event.cancel();
        }
        return;
      }


      case Event.ONMOUSEDOWN:
        // Don't eat events if event capture is enabled, as this can
        // interfere with dialog dragging, for example.
        if (DOM.getCaptureElement() != null) {
          event.consume();
          return;
        }


        if (!eventTargetsPopupOrPartner && autoHide) {
          hide(true);
          return;
        }
        break;
      case Event.ONMOUSEUP:
      case Event.ONMOUSEMOVE:
      case Event.ONCLICK:
      case Event.ONDBLCLICK: {
        // Don't eat events if event capture is enabled, as this can
        // interfere with dialog dragging, for example.
        if (DOM.getCaptureElement() != null) {
          event.consume();
          return;
        }
        break;
      }


      case Event.ONFOCUS: {
        Element target = nativeEvent.getTarget();
        if (modal && !eventTargetsPopupOrPartner && (target != null)) {
          blur(target);
          event.cancel();
          return;
        }

View Full Code Here

        // mouseMove events and we'll
        // be weird relative x & y's from senders anyway.
        // BUT it turns out that FF clientX & Y are rogered for
        // ScrollWheel events, -> replace-with
        // MozillaImpl
        Event curEvent = DOM.eventGetCurrentEvent();


        int lastx = clientMouseImpl.getClientX(curEvent);
        int lasty = clientMouseImpl.getClientY(curEvent);


        int dx = lastx - getAbsoluteLeft() - halfWidth;

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    if (event.isCanceled()) {
      return;
    }


    // If the event targets the popup or the partner, consume it
    Event nativeEvent = Event.as(event.getNativeEvent());
    boolean eventTargetsPopupOrPartner = eventTargetsPopup(nativeEvent)
        || eventTargetsPartner(nativeEvent);
    if (eventTargetsPopupOrPartner) {
      event.consume();
    }


    // Cancel the event if it doesn't target the modal popup. Note that the
    // event can be both canceled and consumed.
    if (modal) {
      event.cancel();
    }


    // Switch on the event type
    int type = nativeEvent.getTypeInt();
    switch (type) {
      case Event.ONKEYDOWN: {
        if (!onKeyDownPreview((char) nativeEvent.getKeyCode(),
            KeyboardListenerCollection.getKeyboardModifiers(nativeEvent))) {
          event.cancel();
        }
        return;
      }
      case Event.ONKEYUP: {
        if (!onKeyUpPreview((char) nativeEvent.getKeyCode(),
            KeyboardListenerCollection.getKeyboardModifiers(nativeEvent))) {
          event.cancel();
        }
        return;
      }
      case Event.ONKEYPRESS: {
        if (!onKeyPressPreview((char) nativeEvent.getKeyCode(),
            KeyboardListenerCollection.getKeyboardModifiers(nativeEvent))) {
          event.cancel();
        }
        return;
      }


      case Event.ONMOUSEDOWN:
        // Don't eat events if event capture is enabled, as this can
        // interfere with dialog dragging, for example.
        if (DOM.getCaptureElement() != null) {
          event.consume();
          return;
        }


        if (!eventTargetsPopupOrPartner && autoHide) {
          hide(true);
          return;
        }
        break;
      case Event.ONMOUSEUP:
      case Event.ONMOUSEMOVE:
      case Event.ONCLICK:
      case Event.ONDBLCLICK: {
        // Don't eat events if event capture is enabled, as this can
        // interfere with dialog dragging, for example.
        if (DOM.getCaptureElement() != null) {
          event.consume();
          return;
        }
        break;
      }


      case Event.ONFOCUS: {
        Element target = nativeEvent.getTarget();
        if (modal && !eventTargetsPopupOrPartner && (target != null)) {
          blur(target);
          event.cancel();
          return;
        }

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        if (!cm.isHidden(i)) {
          before = i;
          break;
        }
      }
      Event event = ce.getEvent();
      int x = event.getClientX();
      Region r = header.el().getRegion();
      int hw = splitterWidth;


      el().setY(container.el().getY());
      el().setHeight(container.getHeight());

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            }


            if (features.length() > 0) {
                // if 'special features' are set, use window.open(), unless
                // a modifier key is held (ctrl to open in new tab etc)
                Event e = DOM.eventGetCurrentEvent();
                if (!e.getCtrlKey() && !e.getAltKey() && !e.getShiftKey()
                        && !e.getMetaKey()) {
                    Window.open(src, target, features);
                    e.preventDefault();
                }
            }
        }
    }

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    }
    }
  
  protected void onContextMenu(int row) {
      if(contextMenu != null) {
          Event event = Event.getCurrentEvent();
            event.cancelBubble(true);
            event.preventDefault();
            contextMenuTarget = items.get(row);
            contextMenu.load(AsyncCallbackFactory.<Void>defaultNewInstance());
            contextMenu.showPopup(null);
      }
    }

View Full Code Here

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