{-----------------------------------------------------------------------------
The contents of this file are subject to the Mozilla Public License
Version 1.1 (the "License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/MPL-1.1.html

Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
the specific language governing rights and limitations under the License.

The Original Code is: JvNotitle.PAS, released on 2001-02-28.

The Initial Developer of the Original Code is Sébastien Buysse [sbuysse@buypin.com]
Portions created by Sébastien Buysse are Copyright (C) 2001 Sébastien Buysse.
All Rights Reserved.

Contributor(s): Michael Beck [mbeck@bigfoot.com].

Last Modified: 2000-02-28

You may retrieve the latest version of this file at the Project JEDI home page,
located at http://www.delphi-jedi.org

Known Issues:
-----------------------------------------------------------------------------}
{$A+,B-,C+,D+,E-,F-,G+,H+,I+,J+,K-,L+,M-,N+,O+,P+,Q-,R-,S-,T-,U-,V+,W-,X+,Y+,Z1}
{$I JEDI.INC}

unit JvNotitle;

{$ObjExportAll On}

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,JvComponent;

type
  TJvNoTitle = class(TJvComponent)
  private
    FHasTitle: Boolean;
    FForm: TCustomForm;
    procedure SetTitle(const Value: Boolean);
  protected
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property HasTitle: Boolean read FHasTitle write SetTitle default True;
  end;

implementation

{**************************************************}

constructor TJvNoTitle.Create(AOwner: TComponent);
begin
  inherited;
  FHasTitle := True;
  FForm := GetParentForm(TControl(AOwner));
end;

{**************************************************}

destructor TJvNoTitle.Destroy;
begin
  if not (csDestroying in FForm.ComponentState) then
    SetTitle(True);
  inherited;
end;

{**************************************************}

procedure TJvNoTitle.SetTitle(const Value: Boolean);
var
  bDoesTitleBarExist: Boolean;
  Style: LongInt;
begin
  if Value <> FHasTitle then
  begin
    FHasTitle := Value;
    { SMM 2002-06-07  Bug # 15
      The form's BorderStyle is bsNone, there is no titlebar to manipulate. }
    if FForm.BorderStyle = bsNone then
      Exit;

    { SMM 2002-06-07  Bug # 15
      Resize the form to take into account the titlebar manipulation.  Only resize
      the form if it is needed.  For example: if a titlebar already exists and the
      value of FHasTitle is set to True, we don't want to increase the height of
      the form. }
    Style := GetWindowLong(FForm.Handle, GWL_STYLE);
    bDoesTitleBarExist := ((Style and WS_CAPTION) = WS_CAPTION);

    if FHasTitle then
    begin
      if not bDoesTitleBarExist then
      begin
        SetWindowLong(FForm.Handle, GWL_STYLE, Style or WS_CAPTION);
        FForm.Height := FForm.Height + GetSystemMetrics(SM_CYCAPTION);
      end;
    end
    else
    begin
      if bDoesTitleBarExist then
      begin
        SetWindowLong(FForm.Handle, GWL_STYLE, Style and (not WS_CAPTION));
        FForm.Height := FForm.Height - GetSystemMetrics(SM_CYCAPTION);
      end;
    end;
  FForm.Refresh;
  end;
end;

end.