GxImage: MouseDown

MouseDown

Occurs when the user presses a mouse button.



 Event MouseDown(
	  ByVal Button As Integer,
	  ByVal Shift As Integer,
	  ByVal x As Long,
	  ByVal y As Long )

Parameters

Button
Returns an integer that identifies the button that was pressed to cause the event. The button argument is a bit field with bits corresponding to the left button (bit 0), right button (bit 1), and middle button (bit 2). These bits correspond to the values 1, 2, and 4, respectively. Only one of the bits is set, indicating the button that caused the event.
Shift
Returns an integer that corresponds to the state of the SHIFT, CTRL, and ALT keys when the button specified in the button argument is pressed or released. A bit is set if the key is down. The shift argument is a bit field with the least-significant bits corresponding to the SHIFT key (bit 0), the CTRL key (bit 1), and the ALT key (bit 2 ). These bits correspond to the values 1, 2, and 4, respectively. The shift argument indicates the state of these keys. Some, all, or none of the bits can be set, indicating that some, all, or none of the keys are pressed. For example, if both CTRL and ALT were pressed, the value of shift would be 6.
x
The horizontal coordinate of the mouse pointer in pixel (image coordinate).
y
The vertical coordinate of the mouse pointer in pixel (image coordinate).

Languages

[Visual Basic] Event MouseDown(ByVal Button As Integer, ByVal Shift As Integer, ByVal X As Long, ByVal Y As Long)

[Delphi] procedure MouseDown(Sender: TObject; Button, Shift: Smallint; x, y: Integer);

[C++] void OnMouseDown(short Button, short Shift, long x, long y);

Remarks

[Delphi] The Sender parameter indicates which component received the event and therefore called the handler.

See Also

Class GxImage Overview GxImage Properties GxImage Methods Mirror MouseMove