Vcl.ActnMan.TCustomActionBar.VisibleChanging
Delphi
procedure VisibleChanging; override;
C++
DYNAMIC void __fastcall VisibleChanging(void);
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
procedure function |
protected | Vcl.ActnMan.pas Vcl.ActnMan.hpp |
Vcl.ActnMan | TCustomActionBar |
Description
Provides the interface for a method that responds to changes in the control's visibility. {{#multireplace:Vcl.ActnMan.TCustomActionBar.VisibleChanging|H21=!|H25=%|H28=(|H29=)|H2A=*|H2B=+|H2F=/|H3C=<|H3D==|H3E=>|H5B=[|H5D=]|H5E=^|H7C=|}} inherits from {{#multireplace:Vcl.Controls.TControl.VisibleChanging|H21=!|H25=%|H28=(|H29=)|H2A=*|H2B=+|H2F=/|H3C=<|H3D==|H3E=>|H5B=[|H5D=]|H5E=^|H7C=|}}. All content below this line refers to {{#multireplace:Vcl.Controls.TControl.VisibleChanging|H21=!|H25=%|H28=(|H29=)|H2A=*|H2B=+|H2F=/|H3C=<|H3D==|H3E=>|H5B=[|H5D=]|H5E=^|H7C=|}}.
Provides the interface for a method that responds to changes in the control's visibility.
VisibleChanging is called before the value of a control's Visible property changes. As implemented in TControl, it does nothing. Override VisibleChanging to respond to changes in the control's visibility. For example, if a control should not change its visibility, override VisibleChanging to raise an exception when an attempt is made to alter the control's visibility.