API:FMX.Controls.Presentation.TPresentedControl.KeyUp

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Delphi 

procedure KeyUp(var AKey: Word; var AKeyChar: Char; AShift: TShiftState); override;

C++ 

virtual void __fastcall KeyUp(System::Word &AKey, System::WideChar &AKeyChar, System::Classes::TShiftState AShift);

Properties

Type Visibility Source Unit Parent
procedure
function
 protected
FMX.Controls.Presentation.pas
FMX.Controls.Presentation.hpp
 FMX.Controls.Presentation TPresentedControl

Description

OnKeyUp event dispatcher.

FMX.Controls.Presentation.TPresentedControl.KeyUp inherits from FMX.Controls.TControl.KeyUp. All content below this line refers to FMX.Controls.TControl.KeyUp.

OnKeyUp event dispatcher.

KeyUp provides a response when a key is released while the control has keyboard focus. KeyUp calls the OnKeyUp event handler if one is assigned.

A control calls KeyUp in response to any key-up messages, decoding the message parameters into the key code, character code, and shift state. The control passes them in the Key, KeyChar, and Shift parameters, respectively:

  • Key is the scan code of the released keyboard key.
  • KeyChar is the character code of the released key.
  • Shift indicates which shift keys--SHIFT, CTRL, ALT, and CMD (only for Mac)--were down when you release the previously pressed key with the control in focus.

Override the protected KeyUp method to provide other responses when a key is released while the control has keyboard input focus.

See Also

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