FMX.Presentation.Style.TStyledPresentation.MouseDown

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Object Pascal

procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X: Single; Y: Single); override;

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.Presentation.Style.pas
FMX.Presentation.Style.hpp
FMX.Presentation.Style TStyledPresentation

Description

OnMouseDown event dispatcher.

FMX.Presentation.Style.TStyledPresentation.MouseDown inherits from FMX.Controls.TControl.MouseDown. All content below this line refers to FMX.Controls.TControl.MouseDown.

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 and Y are the pixel coordinates of the mouse pointer within the client area of the control. If <Button> is mbLeft, 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.


See Also