visual basic 2010 barcode generator The MouseEvent Class in Java

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The MouseEvent Class
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There are seven types of mouse events The MouseEvent class defines the following integer constants that can be used to identify them: MOUSE_CLICKED The user clicked the mouse
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MOUSE_DRAGGED MOUSE_ENTERED MOUSE_EXITED MOUSE_MOVED MOUSE_PRESSED MOUSE_RELEASED
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The user dragged the mouse The mouse entered a component The mouse exited from a component The mouse moved The mouse was pressed The mouse was released
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MouseEvent is a subclass of InputEvent and has this constructor: MouseEvent(Component src, int type, long when, int modifiers, int x, int y, int clicks, boolean triggersPopup) Here, src is a reference to the component that generated the event The type of the event is specified by type The system time at which the mouse event occurred is passed in when The modifiers argument indicates which modifiers were pressed when a mouse event occurred The coordinates of the mouse are passed in x and y The click count is passed in clicks The triggersPopup flag indicates if this event causes a pop-up menu to appear on this platform The most commonly used methods in this class are getX( ) and getY( ) These return the X and Y coordinates of the mouse when the event occurred Their forms are shown here: int getX( ) int getY( ) Alternatively, you can use the getPoint( ) method to obtain the coordinates of the mouse It is shown here: Point getPoint( ) It returns a Point object that contains the X, Y coordinates in its integer members: x and y The translatePoint( ) method changes the location of the event Its form is shown here: void translatePoint(int x, int y) Here, the arguments x and y are added to the coordinates of the event The getClickCount( ) method obtains the number of mouse clicks for this event Its signature is shown here: int getClickCount( ) The isPopupTrigger( ) method tests if this event causes a pop-up menu to appear on this platform Its form is shown here: boolean isPopupTrigger( )
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The TextEvent Class
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Instances of this class describe text events These are generated by text fields and text areas when characters are entered by a user or program TextEvent defines the integer constant TEXT_VALUE_CHANGED The one constructor for this class is shown here: TextEvent(Object src, int type) Here, src is a reference to the object that generated this event The type of the event is specified by type The TextEvent object does not include the characters currently in the text component that generated the event Instead, your program must use other methods associated with the text component to retrieve that information This operation differs from other event objects discussed in this section For this reason, no methods are discussed here for the TextEvent class Think of a text event notification as a signal to a listener that it should retrieve information from a specific text component
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The WindowEvent Class
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There are seven types of window events The WindowEvent class defines integer constants that can be used to identify them The constants and their meanings are shown here: WINDOW_ACTIVATED WINDOW_CLOSED WINDOW_CLOSING The window was activated The window has been closed The user requested that the window be closed
WINDOW_DEACTIVATED The window was deactivated WINDOW_DEICONIFIED WINDOW_ICONIFIED WINDOW_OPENED The window was deiconified The window was iconified The window was opened
WindowEvent is a subclass of ComponentEvent and has this constructor: WindowEvent(Window src, int type) Here, src is a reference to the object that generated this event The type of the event is type The most commonly used method in this class is getWindow( ) It returns the Window object that generated the event Its general form is shown here: Window getWindow( )
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