FMX.Controls.TControl.MouseDown
Delphi
procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Single); virtual;
C++
virtual void __fastcall MouseDown(System::Uitypes::TMouseButton Button, System::Classes::TShiftState Shift, float X, float Y);
Properties
Type | Visibility | Source | Unit | Parent |
---|---|---|---|---|
procedure function |
protected | FMX.Controls.pas FMX.Controls.hpp |
FMX.Controls | TControl |
Description
OnMouseDown event dispatcher.
A control calls MouseDown in response to any of mouse-down messages, decoding the message parameters into the shift-key state and position, which it passes in the Shift
, X
, and Y
parameters, respectively:
Button
determines which mouse button is pressed: left, right, or middle.Shift
indicates which shift keys--SHIFT, CTRL, ALT, and CMD (only for Mac)--were down when the user pressed the mouse button.X
andY
are the pixel coordinates of the mouse pointer within the client area of the control. IfButton
ismbLeft
, MouseDown sets PressedPosition as a TPointF(X
,Y
).
Override the protected MouseDown method to provide other responses when a mouse button is down while the cursor is over the control.