david
78ab77cd4c
git-svn-id: https://192.168.0.254/svn/Componentes.Terceros.jvcl@19 7f62d464-2af8-f54e-996c-e91b33f51cbe
139 lines
4.1 KiB
ObjectPascal
139 lines
4.1 KiB
ObjectPascal
{-----------------------------------------------------------------------------
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The contents of this file are subject to the Mozilla Public License
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Version 1.1 (the "License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/MPL-1.1.html
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
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the specific language governing rights and limitations under the License.
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The Original Code is: JvAutoSizeCompo.PAS, released on 2001-02-28.
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The Initial Developer of the Original Code is Sébastien Buysse [sbuysse att buypin dott com]
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Portions created by Sébastien Buysse are Copyright (C) 2001 Sébastien Buysse.
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All Rights Reserved.
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Contributor(s): Michael Beck [mbeck att bigfoot dott com].
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You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
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located at http://jvcl.delphi-jedi.org
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Known Issues:
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-----------------------------------------------------------------------------}
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// $Id: JvFormAutoSize.pas 12461 2009-08-14 17:21:33Z obones $
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unit JvFormAutoSize;
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{$I jvcl.inc}
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interface
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uses
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{$IFDEF UNITVERSIONING}
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JclUnitVersioning,
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{$ENDIF UNITVERSIONING}
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SysUtils, Classes, Windows, Messages, Graphics, Controls, Forms, StdCtrls,
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JvComponentBase;
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type
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TJvFormAutoSize = class(TJvComponent)
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private
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FForm: TForm;
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FActive: Boolean;
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FResize: TNotifyEvent;
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FOldWidth: Integer;
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FOldHeight: Integer;
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procedure Resize(Sender: TObject);
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public
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constructor Create(AOwner: TComponent); override;
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destructor Destroy; override;
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published
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// (p3) default here should be false!!!
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property Active: Boolean read FActive write FActive default False;
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end;
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{$IFDEF UNITVERSIONING}
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const
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UnitVersioning: TUnitVersionInfo = (
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RCSfile: '$URL: https://jvcl.svn.sourceforge.net/svnroot/jvcl/tags/JVCL3_39/run/JvFormAutoSize.pas $';
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Revision: '$Revision: 12461 $';
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Date: '$Date: 2009-08-14 19:21:33 +0200 (ven., 14 août 2009) $';
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LogPath: 'JVCL\run'
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);
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{$ENDIF UNITVERSIONING}
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implementation
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constructor TJvFormAutoSize.Create(AOwner: TComponent);
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begin
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inherited Create(AOwner);
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// (p3) dangerous: True can create problems without user being aware
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FActive := False;
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FForm := GetParentForm(TControl(AOwner)) as TForm;
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if FForm <> nil then
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begin
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FOldWidth := FForm.Width;
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FOldHeight := FForm.Height;
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FResize := FForm.OnResize;
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FForm.OnResize := Resize;
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end;
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end;
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destructor TJvFormAutoSize.Destroy;
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begin
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if FForm <> nil then
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FForm.OnResize := nil;
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FForm := nil;
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inherited Destroy;
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end;
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procedure TJvFormAutoSize.Resize(Sender: TObject);
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var
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WidthRatio, HeightRatio: Double;
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CompIndex: Integer;
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begin
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if FForm = nil then
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FForm := GetParentForm(Owner as TControl) as TForm;
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if FActive and (FForm <> nil) then
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begin
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// (p3) this code is slightly dangerous: no sanity checks -
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// values can become really large or really small
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if (FOldWidth <> 0) and (FOldHeight <> 0) then
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begin
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WidthRatio := FForm.Width / FOldWidth;
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HeightRatio := FForm.Height / FOldHeight;
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for CompIndex := 0 to FForm.ComponentCount - 1 do
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begin
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if FForm.Components[CompIndex] is TControl then
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begin
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with FForm.Components[CompIndex] as TControl do
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begin
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if not (FForm.Components[CompIndex] is TButton) then
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begin
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Width := Round(Width * WidthRatio);
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Height := Round(Height * HeightRatio);
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end;
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Left := Round(Left * WidthRatio);
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Top := Round(Top * HeightRatio);
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end;
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end;
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end;
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end;
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FOldWidth := FForm.Width;
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FOldHeight := FForm.Height;
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end;
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if Assigned(FResize) then
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FResize(Sender);
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end;
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{$IFDEF UNITVERSIONING}
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initialization
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RegisterUnitVersion(HInstance, UnitVersioning);
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finalization
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UnregisterUnitVersion(HInstance);
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{$ENDIF UNITVERSIONING}
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end. |