SizeGrip, Version 1.2a (alt)
Hinweis: dies ist nicht die neueste Version!
Datei: SizeGripThemed.pas
{ SizeGripThemed.pas Delphi component to add a size grip (like if you use a status bar) to the lower right corner of any TWinControl (like TForm). "SizeGripThemed.pas" is the version using the currently selected visual style. See the included README.txt for more information and how to use it. This unit has been separated from SizeGrip.pas to avoid linking of UxTheme if not necessary. Version 1.2a - always find the most current version at http://flocke.vssd.de/prog/code/pascal/sizegrip/ Copyright (C) 2005, 2006 Volker Siebert <flocke@vssd.de> All rights reserved. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. } unit SizeGripThemed; interface uses Windows, Messages, SysUtils, Classes, Graphics, Controls, SizeGrip; type TSizeGripThemed = class(TSizeGrip) private FThemeWindow: HWND; FThemeHandle: THandle; FThemed: boolean; procedure CheckTheme; procedure SetThemed(const Value: boolean); protected procedure GetGripRect(var Rect: TRect); override; procedure PaintIt(DC: HDC; const Rect: TRect); override; procedure NewWndProc(var Msg: TMessage); override; public constructor Create(AOwner: TComponent); override; destructor Destroy; override; published property Themed: boolean read FThemed write SetThemed default true; end; procedure Register; implementation uses UxTheme; { TSizeGripThemed } constructor TSizeGripThemed.Create(AOwner: TComponent); begin InitThemeLibrary; FThemed := true; inherited; end; destructor TSizeGripThemed.Destroy; begin inherited; CheckTheme; FreeThemeLibrary; end; { Check for the current theme } procedure TSizeGripThemed.CheckTheme; var ThemesOk: boolean; begin ThemesOk := UseThemes and FThemed and (TargetControl <> nil) and TargetControl.HandleAllocated; if FThemeHandle <> 0 then if (not ThemesOk) or (FThemeWindow <> TargetControl.Handle) then begin CloseThemeData(FThemeHandle); FThemeHandle := 0; FThemeWindow := 0; end; if FThemeHandle = 0 then if ThemesOk then begin FThemeWindow := TargetControl.Handle; FThemeHandle := OpenThemeData(FThemeWindow, 'STATUS'); end; end; procedure TSizeGripThemed.SetThemed(const Value: boolean); begin if FThemed <> Value then begin InvalidateGrip; FThemed := Value; CheckTheme; UpdateGrip; end; end; { The new Window procedure for the attached target control. } procedure TSizeGripThemed.NewWndProc(var Msg: TMessage); begin // $031A = WM_THEMECHANGED if Msg.Msg = $031A then if FThemeHandle <> 0 then begin CloseThemeData(FThemeHandle); FThemeHandle := 0; FThemeWindow := 0; end; inherited NewWndProc(Msg); end; { Calculate the size grip's rectangle } procedure TSizeGripThemed.GetGripRect(var Rect: TRect); var DC: HDC; Size, Size2: TSize; begin CheckTheme; if FThemeHandle <> 0 then begin Size.cx := GetSystemMetrics(SM_CXVSCROLL); Size.cy := GetSystemMetrics(SM_CYHSCROLL); DC := GetDC(FThemeWindow); try // 3 = SP_GRIPPER if GetThemePartSize(FThemeHandle, DC, 3, 0, nil, TS_TRUE, Size2) = S_OK then begin if Size2.cx > Size.cx then Size.cx := Size2.cx; if Size2.cy > Size.cy then Size.cy := Size2.cy; end; finally ReleaseDC(FThemeWindow, DC); end; Rect := TargetControl.ClientRect; Rect.Left := Rect.Right - Size.cx; Rect.Top := Rect.Bottom - Size.cy; end else inherited GetGripRect(Rect); end; { Paint the size grip } procedure TSizeGripThemed.PaintIt(DC: HDC; const Rect: TRect); begin CheckTheme; // 3 = SP_GRIPPER if (FThemeHandle = 0) or (DrawThemeBackground(FThemeHandle, DC, 3, 0, Rect, @Rect) <> S_OK) then inherited PaintIt(DC, Rect); end; { Register } procedure Register; begin RegisterComponents('System', [TSizeGripThemed]); end; end. |