Title: Custom CaptonBar
Question: How to create custom captionbar, and make an object become a captionbar?
Answer:
You can remove standard captionbar and replace it with yours like in this example:
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unit custom;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
AppEvnts, ExtCtrls, StdCtrls, Buttons, Menus;
type
TPopup = class(TForm)
image1: TImage;
procedure FormCreate(Sender: TObject);
private
FCaptionControl: TGraphicControl;
procedure WMNCHitTest (var Message: TWMNCHitTest); message WM_NCHITTEST;
protected
procedure CreateParams (var Params: TCreateParams); override;
public
property CaptionControl: TGraphicControl
read FCaptionControl write FCaptionControl default NIL;
end;
var
Popup: TPopup;
implementation
{$R *.DFM}
procedure TPopup.CreateParams(var Params: TCreateParams);
begin
inherited CreateParams (Params);
with Params do begin
Style := (Style OR WS_POPUP) AND (NOT WS_DLGFRAME);
end;
end;
procedure TPopup.WMNCHitTest (var Message: TWMNCHitTest);
begin
inherited;
if (Message.Result = HTCLIENT) then begin
if Assigned (CaptionControl) then begin
if ((CaptionControl.Left (CaptionControl.Top (CaptionControl.Left + CaptionControl.Width = Message.XPos - Left) AND
(CaptionControl.Top + CaptionControl.Height = Message.YPos - Top)) then begin
Message.Result := HTCAPTION;
end;
end;
end;
end;
procedure TPopup.FormCreate(Sender: TObject);
begin
captioncontrol:= image1;
end;
end.
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