Componentes.Terceros.jvcl/official/3.36/archive/JvgBitBtn.pas

{-----------------------------------------------------------------------------
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: JvgBitBtn.PAS, released on 2003-01-15.

The Initial Developer of the Original Code is Andrey V. Chudin,  [chudin att yandex dott ru]
Portions created by Andrey V. Chudin are Copyright (C) 2003 Andrey V. Chudin.
All Rights Reserved.

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

You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
located at http://jvcl.sourceforge.net

Known Issues:
-----------------------------------------------------------------------------}
// $Id: JvgBitBtn.pas 10610 2006-05-19 13:35:08Z elahn $

unit JvgBitBtn;

{$I jvcl.inc}

interface

uses
  {$IFDEF USEJVCL}
  {$IFDEF UNITVERSIONING}
  JclUnitVersioning,
  {$ENDIF UNITVERSIONING}
  {$ENDIF USEJVCL}
  Windows, Messages, Classes, Controls, Graphics, ExtCtrls, Buttons, Forms,
  {$IFDEF USEJVCL}
  JVCLVer, JvExButtons,
  {$ENDIF USEJVCL}
  JvgTypes, JvgCommClasses, JvgUtils;

type
  {$IFDEF USEJVCL}
  TJvgBitBtn = class(TJvExBitBtn)
  {$ELSE}
  TJvgBitBtn = class(TBitBtn)
  {$ENDIF USEJVCL}
  private
    FCanvas: TControlCanvas;
    function GetCanvas: TCanvas;
    procedure CNDrawItem(var Msg: TWMDrawItem); message CN_DRAWITEM;
  protected
    procedure DrawItem(const DrawItemStruct: TDrawItemStruct);
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    property Canvas: TCanvas read GetCanvas;
  published
    {$IFDEF USEJVCL}
    property HintColor;
    property OnParentColorChange;
    property OnMouseEnter;
    property OnMouseLeave;
    {$ENDIF USEJVCL}
  end;

{$IFDEF USEJVCL}
{$IFDEF UNITVERSIONING}
const
  UnitVersioning: TUnitVersionInfo = (
    RCSfile: '$RCSfile$';
    Revision: '$Revision: 10610 $';
    Date: '$Date: 2006-05-19 15:35:08 +0200 (ven., 19 mai 2006) $';
    LogPath: 'JVCL\run'
  );
{$ENDIF UNITVERSIONING}
{$ENDIF USEJVCL}

implementation

constructor TJvgBitBtn.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FCanvas := TControlCanvas.Create;
  FCanvas.Control := Self; //...i can draw now! :)
end;

destructor TJvgBitBtn.Destroy;
begin
  inherited Destroy;
  // (rom) destroy Canvas AFTER inherited Destroy
  FCanvas.Free;
end;

function TJvgBitBtn.GetCanvas: TCanvas;
begin
  Result := FCanvas;
end;

procedure TJvgBitBtn.CNDrawItem(var Msg: TWMDrawItem);
begin
  inherited;
  DrawItem(Msg.DrawItemStruct^);
end;

procedure TJvgBitBtn.DrawItem(const DrawItemStruct: TDrawItemStruct);
var
  IsDown: Boolean;
  R: TRect;
begin
  if csDestroying in ComponentState then
    Exit;
  FCanvas.Handle := DrawItemStruct.hDC;
  R := ClientRect;
  IsDown := DrawItemStruct.itemState and ODS_SELECTED <> 0;
  {$IFDEF USEJVCL}
  if (not MouseOver) and (not IsDown) then
  {$ELSE}
  if not IsDown then
  {$ENDIF USEJVCL}
    with FCanvas do
      if not Focused and not Default then
      begin
        Pen.Color := clBtnFace;
        MoveTo(R.Left + 1, R.Top + 1);
        LineTo(R.Right - 1, R.Top + 1);
        MoveTo(R.Left + 1, R.Top + 1);
        LineTo(R.Left + 1, R.Bottom - 1);

        Pen.Color := (Parent as TWinControl).Brush.Color;
        MoveTo(R.Left, R.Bottom - 1);
        LineTo(R.Right, R.Bottom - 1);
        MoveTo(R.Right - 1, R.Top);
        LineTo(R.Right - 1, R.Bottom);

        Pen.Color := clBtnShadow;
        MoveTo(R.Left - 2, R.Bottom - 2);
        LineTo(R.Right - 1, R.Bottom - 2);
        MoveTo(R.Right - 2, R.Top);
        LineTo(R.Right - 2, R.Bottom - 1);
      end
      else
      begin
        Brush.Color := clBtnFace;
        FrameRect(Rect(R.Left + 2, R.Top + 2, R.Right - 2, R.Bottom - 2));
      end;
  FCanvas.Handle := 0;
end;

{$IFDEF USEJVCL}
{$IFDEF UNITVERSIONING}
initialization
  RegisterUnitVersion(HInstance, UnitVersioning);

finalization
  UnregisterUnitVersion(HInstance);
{$ENDIF UNITVERSIONING}
{$ENDIF USEJVCL}

end.