FMX.Forms.TCommonCustomForm.VirtualKeyboardChangeHandler

• Up to Parent: TCommonCustomForm

Delphi

procedure VirtualKeyboardChangeHandler(const Sender: TObject; const Msg: System.Messaging.TMessage); virtual;

C++

virtual void __fastcall VirtualKeyboardChangeHandler(System::TObject* const Sender, System::Messaging::TMessageBase* const Msg);

Properties

Type	Visibility	Source	Unit	Parent
procedure function	protected	FMX.Forms.pas FMX.Forms.hpp	FMX.Forms	TCommonCustomForm

Description

The listener for virtual keyboard events of the form.

TCommonCustomForm uses the System.Messaging.TMessageManager.SubscribeToMessage method to subscribe the VirtualKeyboardChangeHandler listener to the TVKStateChangeMessage virtual keyboard events.

The VirtualKeyboardChangeHandler listener handles the KeyboardVisible and KeyboardBounds properties by calling the OnVirtualKeyboardShown and OnVirtualKeyboardHidden event handlers.

See Also

• FMX.ScrollableForm Sample
• FMX.KeyboardTypes Sample

• System.Messaging.TMessageManager.SubscribeToMessage
• System.Messaging.TMessageListenerMethod
• System.Messaging.TMessage
• FMX.Types.TVirtualKeyboardEvent
• FMX.Forms.TCommonCustomForm.OnVirtualKeyboardShown
• FMX.Forms.TCommonCustomForm.OnVirtualKeyboardHidden
• FMX.Forms.TVKStateChangeMessage
• FMX.Forms.TVKStateChangeMessage.KeyboardVisible
• FMX.Forms.TVKStateChangeMessage.KeyboardBounds