TControl.InvalidateControl procedure
Requests a repaint of the control.
Declaration
procedure InvalidateControl(CtrlIsVisible: Boolean;
CtrlIsOpaque: Boolean)
procedure InvalidateControl(CtrlIsVisible: Boolean;
CtrlIsOpaque: Boolean;
IgnoreWinControls: Boolean)Arguments
CtrlIsVisible | True if the control is visible. |
CtrlIsOpaque | True if the control use an opaque drawing style. |
IgnoreWinControls | True if TWinControl descendants are ignored in the method. |
Description
InvalidateControl is an overloaded method used to redraw the
bounds rectangle for control. No actions are performed in the method if the
Parent control or its Handle are not assigned, during LCL component
streaming, or when the control is being freed.
When CtrlIsVisible is set to True or the control has a visible design surface, the InvalidateRect routine is called. The BoundsRect for the control is erased and redrawn when the control uses an opaque drawing style, or when it occludes a sibling control in its Parent.
InvalidateControl is called from methods like Invalidate and ChangeBounds, and when a new value is assigned to the Visible property.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.