Examples of java.awt.KeyEventDispatcher.dispatchKeyEvent()

java.awt.KeyEventDispatcher.dispatchKeyEvent()

This method is called by the current KeyboardFocusManager requesting that this KeyEventDispatcher dispatch the specified event on its behalf. This KeyEventDispatcher is free to retarget the event, consume it, dispatch it itself, or make other changes. This capability is typically used to deliver KeyEvents to Components other than the focus owner. This can be useful when navigating children of non-focusable Windows in an accessible environment, for example. Note that if a KeyEventDispatcher dispatches the KeyEvent itself, it must use redispatchEvent to prevent the current KeyboardFocusManager from recursively requesting that this KeyEventDispatcher dispatch the event again.

If an implementation of this method returns false, then the KeyEvent is passed to the next KeyEventDispatcher in the chain, ending with the current KeyboardFocusManager. If an implementation returns true, the KeyEvent is assumed to have been dispatched (although this need not be the case), and the current KeyboardFocusManager will take no further action with regard to the KeyEvent. In such a case, KeyboardFocusManager.dispatchEvent should return true as well. If an implementation consumes the KeyEvent, but returns false, the consumed event will still be passed to the next KeyEventDispatcher in the chain. It is important for developers to check whether the KeyEvent has been consumed before dispatching it to a target. By default, the current KeyboardFocusManager will not dispatch a consumed KeyEvent. @param e the KeyEvent to dispatch @return true if the KeyboardFocusManager should take nofurther action with regard to the KeyEvent; false otherwise @see KeyboardFocusManager#redispatchEvent

        KeyEvent.CHAR_UNDEFINED);
    KeyEvent ctrlUp = new KeyEvent(p, KeyEvent.KEY_RELEASED, System.currentTimeMillis(), 0, KeyEvent.VK_CONTROL,
        KeyEvent.CHAR_UNDEFINED);
    
    // Pressing when mouse is not over should do nothing
    d.dispatchKeyEvent(ctrlDown);  
    Mockito.verifyZeroInteractions(controlManager);
    
    // Now, try it with mouse in the plot area
    Mockito.when(listener.isMouseOutsideOfPlotArea()).thenReturn(false);

    
    // Now, try it with mouse in the plot area
    Mockito.when(listener.isMouseOutsideOfPlotArea()).thenReturn(false);    
    
    // Now, it should inform the control manager of the key press
    d.dispatchKeyEvent(ctrlDown);
    Mockito.verify(controlManager, Mockito.atLeastOnce()).informKeyState(KeyEvent.VK_CONTROL, true);
    d.dispatchKeyEvent(ctrlUp);
    Mockito.verify(controlManager, Mockito.atLeastOnce()).informKeyState(KeyEvent.VK_CONTROL, false);
  }

    Mockito.when(listener.isMouseOutsideOfPlotArea()).thenReturn(false);    
    
    // Now, it should inform the control manager of the key press
    d.dispatchKeyEvent(ctrlDown);
    Mockito.verify(controlManager, Mockito.atLeastOnce()).informKeyState(KeyEvent.VK_CONTROL, true);
    d.dispatchKeyEvent(ctrlUp);
    Mockito.verify(controlManager, Mockito.atLeastOnce()).informKeyState(KeyEvent.VK_CONTROL, false);
  }
  
}

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