david
78ab77cd4c
git-svn-id: https://192.168.0.254/svn/Componentes.Terceros.jvcl@19 7f62d464-2af8-f54e-996c-e91b33f51cbe
120 lines
3.4 KiB
ObjectPascal
120 lines
3.4 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: JvScreenResolution.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: JvScreenResolution.pas 12461 2009-08-14 17:21:33Z obones $
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unit JvScreenResolution;
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{$I jvcl.inc}
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{$I windowsonly.inc}
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interface
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// (rom) definitely JCL or Archive
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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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{$IFDEF MSWINDOWS}
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Windows,
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{$ENDIF MSWINDOWS}
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SysUtils;
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type
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TJvScreenResolution = class(TObject)
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private
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FCount: Integer;
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function GetCount: Integer;
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function GetMode(Index: Integer): TDevMode;
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public
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procedure GetSupportedModes(var Modes: array of TDevMode; var Count: Integer);
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function SetMode(Value: TDevMode): Boolean;
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// simpler access to DevModes
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property Modes[Index: Integer]: TDevMode read GetMode;
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property Count: Integer read GetCount;
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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/JvScreenResolution.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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uses
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RTLConsts,
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JvTypes;
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function TJvScreenResolution.GetCount: Integer;
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var
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DevMode: TDevMode;
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begin
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if FCount = 0 then
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while EnumDisplaySettings(nil, FCount, DevMode) do
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Inc(FCount);
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Result := FCount;
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end;
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function TJvScreenResolution.GetMode(Index: Integer): TDevMode;
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begin
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if (Index < 0) or (Index >= Count) then
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raise EJVCLException.CreateResFmt(@SListIndexError, [Index]);
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EnumDisplaySettings(nil, Index, Result);
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end;
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procedure TJvScreenResolution.GetSupportedModes(var Modes: array of TDevMode;
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var Count: Integer);
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var
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I: Integer;
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DevMode: TDevMode;
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begin
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I := 0;
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while EnumDisplaySettings(nil, I, DevMode) do
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Inc(I);
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Count := I;
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for I := 0 to Count - 1 do
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EnumDisplaySettings(nil, I, Modes[I]);
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end;
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function TJvScreenResolution.SetMode(Value: TDevMode): Boolean;
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begin
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Value.dmFields := DM_BITSPERPEL or DM_PELSWIDTH or DM_PELSHEIGHT or DM_DISPLAYFLAGS;
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Result := ChangeDisplaySettings(Value, 0) = DISP_CHANGE_SUCCESSFUL;
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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.
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