(regardless of whether the mouse position is within the bounds of theĬomponent). In which the mouse button was pressed until the mouse button is released MOUSE_DRAGGED events are delivered to the Component GetMaskForButton(button) method may be used Nevertheless, ordinal numbers starting from 4 may be Represented by the following constants: BUTTON1, BUTTON2, and BUTTON3.Ĭonstants as well as their button masks have no assigned BUTTONx_DOWN_MASKĬonstants. Some extra mouse buttons are added to extend the standard set of buttons The following sequence of events is generated: When multiple mouse buttons are pressed, each press, release, and clickįor example, if the user presses button 1 followed byīutton 2, and then releases them in the same order, The button which has changed state is returned by getButton()įor example, if the first mouse button is pressed, events are sent in the To get the state of all buttons and modifier keys, use META_MASK/BUTTON3_MASK, this is not always true for mouse events involving
(Note: Due to overlap in the values of ALT_MASK/BUTTON2_MASK and Only the button that changed state, not the current state of all buttons. The button mask returned by InputEvent.getModifiers() reflects The state of modal keys can be retrieved using InputEvent.getModifiers()
When a mouse button is clicked, events are generated and sent to the Gets a MouseEvent containing the mouse motion event. MouseMotionListener interface.) Each such listener object ( MouseMotionAdapter objects implement the Mouse motion events using the component's MouseMotionAdapter object which is registered to receive
Gets a MouseEvent containing the mouse event.Ī MouseEvent object is also passed to every MouseListener interface.) Each such listener object The "interesting" mouse events using the component's Or MouseAdapter object which is registered to receive
the mouse cursor exits the unobscured part of component's geometry. the mouse cursor enters the unobscured part of component's geometry. a mouse button is clicked (pressed and released). This low-level event is generated by a component object for: Instead the mouse motion events areĭispatched to the first ancestors that has enabled mouse motion On the other hand, if a MouseMotionListener has not been added andĪWTEvent.MOUSE_MOTION_EVENT_MASK, then mouse motion events are notĭispatched to the component. The events defined by MouseListener are dispatched to the component. If the mouse event type has not been enabled on the component, theĬorresponding mouse events are dispatched to the first ancestor thatįor example, if a MouseListener has been added to a component, orĮnableEvents(AWTEvent.MOUSE_EVENT_MASK) has been invoked, then all ( AWTEvent.MOUSE_EVENT_MASK or AWTEvent.MOUSE_MOTION_EVENT_MASK). ( MouseListener or MouseMotionListener), or by invokingĬomponent.enableEvents(long) with the appropriate mask parameter A mouse event type is enabled by adding theĪppropriate mouse-based EventListener to the component If the mouse cursor is over the unobscured part of the component's boundsįor lightweight components, such as Swing's components, mouse eventsĪre only dispatched to the component if the mouse event type has beenĮnabled on the component. Private static void createAndShowGUI () įrame.getContentPane().setLayout(new BorderLayout()) įrame.getContentPane().add(new JLabel("don't click me"), BorderLayout.NORTH) įrame.getContentPane().add(lab, BorderLayout.EAST) įrame.getContentPane().add(new JLabel("don't click me either"), BorderLayout.An event which indicates that a mouse action occurred in a component.Ī mouse action is considered to occur in a particular component if and only $ javac TestJLabel.java & java TestJLabel I suppose that if the mouse moved away from the mousePressed location and then back to the mousePressed location when mouseReleased is called, then you might have an argument that mouseClicked should not be called. *EVERY* time the MouseListener reports no mouse position change in its MouseEvent instance between mousePressed and mouseClicked, it must invoke mouseClicked. And that with no change in the reported mouse location nor any intervening mouseMoved call. Click the one called "click me".Īs you move around, pressing and releasing mouse button 1, you will see lines written to stderr.Įventually, if you reproduce the problem, you will see mousePressed followed only by mouseReleased. STEPS TO FOLLOW TO REPRODUCE THE PROBLEM : In other words, if my mouse does not move (according to MouseEvent.getXOnScreen and MouseEvent.getYOnScreen) after mousePressed and mouseReleased, then mouseClicked should be called. On a regular basis, I can use a simple app to cause a MouseListener to not call mouseClicked when it should.
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