{
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 and Themes/ThemeSvr if not necessary.
Version 1.3 - 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
FThemed: boolean;
procedure SetThemed(const Value: boolean);
protected
procedure GetGripRect(var Rect: TRect); override;
procedure PaintIt(DC: HDC; const Rect: TRect); override;
public
constructor Create(AOwner: TComponent); override;
published
property Themed: boolean read FThemed write SetThemed default true;
end;
procedure Register;
implementation
{$I DelphiVersion.inc}
uses
UxTheme,
{$IFDEF DELPHI_9_UP}
Themes;
{$ELSE}
// For Delphi 7 and below you need Mike Lischke's theme manager
// Get it from http://www.lischke-online.de/ThemeManager.php
TmSchema, ThemeSvr;
{$ENDIF}
{ TSizeGripThemed }
constructor TSizeGripThemed.Create(AOwner: TComponent);
begin
FThemed := true;
inherited;
end;
procedure TSizeGripThemed.SetThemed(const Value: boolean);
begin
if FThemed <> Value then
begin
InvalidateGrip;
FThemed := Value;
UpdateGrip;
end;
end;
{ Calculate the size grip's rectangle
}
procedure TSizeGripThemed.GetGripRect(var Rect: TRect);
var
DC: HDC;
Size, Size2: TSize;
begin
if FThemed and ThemeServices.ThemesEnabled then
begin
Size.cx := GetSystemMetrics(SM_CXVSCROLL);
Size.cy := GetSystemMetrics(SM_CYHSCROLL);
DC := GetDC(TargetControl.Handle);
try
if GetThemePartSize(ThemeServices.Theme[teStatus], DC,
SP_GRIPPER, 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(TargetControl.Handle, DC);
end;
Rect := TargetControl.ClientRect;
if TargetControl.UseRightToLeftScrollBar then
Rect.Right := Rect.Left + Size.cx
else
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
if (not FThemed) or
(not ThemeServices.ThemesEnabled) or
(DrawThemeBackground(ThemeServices.Theme[teStatus], DC,
SP_GRIPPER, 0, Rect, @Rect) <> S_OK) then
inherited PaintIt(DC, Rect);
end;
{ Register }
procedure Register;
begin
RegisterComponents('System', [TSizeGripThemed]);
end;
end. |