与“项目|选项|应用程序|启用运行时主题”复选框非常相似,但是在运行时动态处理。
[Delphi XE 以 Win XP 或 Win 7 为目标]
我尝试使用 uxTheme.SetWindowTheme 进行一些调整,但迄今为止没有成功...
仅作为补充Rob Kennedy的回答,您必须以以下方式使用SetThemeAppProperties
。
uses
UxTheme;
procedure DisableThemesApp;
begin
SetThemeAppProperties(0);
SendMessage(Application.Handle,WM_THEMECHANGED,0,0);
SendMessage(Application.MainForm.Handle,CM_RECREATEWND,0,0);
end;
procedure EnableThemesApp;
begin
SetThemeAppProperties(STAP_ALLOW_NONCLIENT or STAP_ALLOW_CONTROLS or STAP_ALLOW_WEBCONTENT);
SendMessage(Application.Handle,WM_THEMECHANGED,0,0);
SendMessage(Application.MainForm.Handle,CM_RECREATEWND,0,0);
end;
为了确定你的控件是否应用了主题,你可以使用GetThemeAppProperties
函数。
var
Flag : DWORD;
begin
Flag:=GetThemeAppProperties;
if (Flag and STAP_ALLOW_CONTROLS)<>0 then //if the controls are themed
begin
end;
end;
更新
由于您描述的问题,我检查了 UxTheme
单元的代码,并发现问题与 UseThemes
函数有关。因此,我编写了这个小修补程序(使用 Andreas Hausladen 开发的 HookProc
、UnHookProc
和 GetActualAddr
函数进行修补),在我的测试中可以正常工作。如果它对您也起作用,请让我知道。
您必须在使用列表中包含 PatchUxTheme,并调用函数 DisableThemesApp
和 EnableThemesApp
。
unit PatchUxTheme;
interface
procedure EnableThemesApp;
procedure DisableThemesApp;
implementation
uses
Controls,
Forms,
Messages,
UxTheme,
Sysutils,
Windows;
type
TJumpOfs = Integer;
PPointer = ^Pointer;
PXRedirCode = ^TXRedirCode;
TXRedirCode = packed record
Jump: Byte;
Offset: TJumpOfs;
end;
PAbsoluteIndirectJmp = ^TAbsoluteIndirectJmp;
TAbsoluteIndirectJmp = packed record
OpCode: Word;
Addr: PPointer;
end;
var
UseThemesBackup: TXRedirCode;
function GetActualAddr(Proc: Pointer): Pointer;
begin
if Proc <> nil then
begin
if (Win32Platform = VER_PLATFORM_WIN32_NT) and (PAbsoluteIndirectJmp(Proc).OpCode = $25FF) then
Result := PAbsoluteIndirectJmp(Proc).Addr^
else
Result := Proc;
end
else
Result := nil;
end;
procedure HookProc(Proc, Dest: Pointer; var BackupCode: TXRedirCode);
var
n: DWORD;
Code: TXRedirCode;
begin
Proc := GetActualAddr(Proc);
Assert(Proc <> nil);
if ReadProcessMemory(GetCurrentProcess, Proc, @BackupCode, SizeOf(BackupCode), n) then
begin
Code.Jump := $E9;
Code.Offset := PAnsiChar(Dest) - PAnsiChar(Proc) - SizeOf(Code);
WriteProcessMemory(GetCurrentProcess, Proc, @Code, SizeOf(Code), n);
end;
end;
procedure UnhookProc(Proc: Pointer; var BackupCode: TXRedirCode);
var
n: Cardinal;
begin
if (BackupCode.Jump <> 0) and (Proc <> nil) then
begin
Proc := GetActualAddr(Proc);
Assert(Proc <> nil);
WriteProcessMemory(GetCurrentProcess, Proc, @BackupCode, SizeOf(BackupCode), n);
BackupCode.Jump := 0;
end;
end;
function UseThemesH:Boolean;
Var
Flag : DWORD;
begin
Flag:=GetThemeAppProperties;
if ( (@IsAppThemed<>nil) and (@IsThemeActive<>nil) ) then
Result := IsAppThemed and IsThemeActive and ((Flag and STAP_ALLOW_CONTROLS)<>0)
else
Result := False;
end;
procedure HookUseThemes;
begin
HookProc(@UxTheme.UseThemes, @UseThemesH, UseThemesBackup);
end;
procedure UnHookUseThemes;
begin
UnhookProc(@UxTheme.UseThemes, UseThemesBackup);
end;
Procedure DisableThemesApp;
begin
SetThemeAppProperties(0);
SendMessage(Application.Handle,WM_THEMECHANGED,0,0);
SendMessage(Application.MainForm.Handle,CM_RECREATEWND,0,0);
end;
Procedure EnableThemesApp;
begin
SetThemeAppProperties(STAP_ALLOW_NONCLIENT or STAP_ALLOW_CONTROLS or STAP_ALLOW_WEBCONTENT);
SendMessage(Application.Handle,WM_THEMECHANGED,0,0);
SendMessage(Application.MainForm.Handle,CM_RECREATEWND,0,0);
end;
initialization
HookUseThemes;
finalization
UnHookUseThemes;
end.
SetThemeAppProperties(0)
似乎没有任何可见效果。 IsAppThemed和IsThemeActive
仍然返回True
,无论是否使用WM_THEMECHANGED
或调用ThemeServices.ApplyThemeChange
。我明天会在Delphi XE上尝试更多... - Francesca在我的一个项目中,我使用了类似这样的东西:
Procedure RemoveTheme(Const Controls : Array Of HWnd; Const Redraw : Boolean = True);
Var
I : Integer;
Begin
If IsAppThemed And IsThemeActive Then Try
I := 0;
While (I < Length(Controls)) Do Begin
If (Controls[I] > 0) And IsWindow(Controls[I]) Then SetWindowTheme(Controls[I], '', '');
If Redraw Then Begin
InvalidateRect(Controls[I], Nil, True);
UpdateWindow(Controls[I]);
End;
Inc(I);
End;
Except
End;
End;
IsAppThemed和IsThemeActive
**仍然返回True
,这会使VCL在尝试绘制时感到困惑... - Francesca