FMX.ExtCtrls.TImageViewer.MouseWheel
Delphi
procedure MouseWheel(Shift: TShiftState; WheelDelta: Integer; var Handled: Boolean); override;
C++
virtual void __fastcall MouseWheel(System::Classes::TShiftState Shift, int WheelDelta, bool &Handled);
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
procedure function |
protected | FMX.ExtCtrls.pas FMX.ExtCtrls.hpp |
FMX.ExtCtrls | TImageViewer |
Description
Internally executed while the mouse wheel is used over the surface of the TImageViewer control.
MouseWheel inherits from FMX.Layouts.TCustomScrollBox.MouseWheel. Additionally, if the MouseScaling property is True, then the mouse wheel rotation modifies the Bitmapscale property. Therefore, rotating the mouse wheel forward will increase the value of the Bitmapscale property, and rotating the mouse wheel backward will decrease the value of the Bitmapscale property.