查找控件的 CRect 并使用 ITaskbarList3 SetThumbnailClip - Windows 11 和 Windows 10

Question

我在获取控件的正确

CRect

坐标时遇到了一些问题，始终如一地在

Windows 11

和

Windows 10

上工作。对于

Windows 11

我必须操纵

CRect

.

我正在使用

CRect

设置缩略图预览剪辑，在任务栏中使用

ITaskbarList3

和

SetThumbnailClip

.

看来，对于

Windows 11

，我必须补偿窗口顶部标题栏、左侧、右侧和底部边距。而在

Windows 10

，我不必这样做以获得正确的坐标。

我怀疑我做错了，无论操作系统如何，我都应该看到一致的行为。我不会想到这些 API 调用中的任何一个都会改变。

这是我目前使用的代码片段。

ITaskbarList3* getTaskBar() {
   HRESULT hr;
   ITaskbarList3* taskBar = NULL;
   CoInitialize(NULL);
   hr = CoCreateInstance(CLSID_TaskbarList, NULL, CLSCTX_SERVER,
      IID_ITaskbarList3, (LPVOID*)&taskBar);
   if (SUCCEEDED(hr)) {
     taskBar->HrInit();
   }
   CoUninitialize(); // maybe not ok here...
   return taskBar;
}

设置缩略图：

ITaskbarList3 *taskbar = getTaskBar();
if (taskbar == NULL) return;

HRESULT result = taskbar->SetThumbnailClip(hWnd, &rect);
taskbar->Release();

Windows 10

CRect rect;
HWND wnd = GetDlgItem(hwnd, ctrlID); // hwnd is the application wnd
GetWindowRect(wnd, &rect); // get the window rect, includes the frame

HWND pwnd = GetParent(wnd); // get the parent window

POINT rectTL;
rectTL.x = rect.left;
rectTL.y = rect.top;
ScreenToClient(pwnd, &rectTL); // convert the window to screen coordinates

POINT rectBR;
rectBR.x = rect.right;
rectBR.y = rect.bottom;
ScreenToClient(pwnd, &rectBR);

rect.left = rectTL.x;
rect.top = rectTL.y;
rect.right = rectBR.x;
rect.bottom = rectBR.y;

return rect; // for windows 10, for windows 11 do more...

Windows 11，这感觉不对……

// for windows 11 I have to do a bit more.
int leftM, rightM, topM, bottomM;
CWnd *mainWnd = AfxGetMainWnd();
CalculateWndMargin(*mainWnd, leftM, rightM, topM, bottomM);

// adjsut the window frame offset for top and bottom
rect.top += topM + bottomM;
rect.bottom += bottomM + topM;

// adjust the window frame offset for the right and left
rect.right += rightM;
rect.left += leftM;

return rect;

从堆栈溢出中借用函数...

void CalculateWndMargin(const CWnd& wnd, int& leftM, int& rightM, int& topM, int& bottomM)
{
   CRect wndRect;
   wnd.GetWindowRect(wndRect);
   CRect screenRect;
   wnd.GetClientRect(screenRect);
   wnd.ClientToScreen(screenRect);
   leftM = screenRect.left - wndRect.left;
   rightM = wndRect.right - screenRect.right;
   topM = screenRect.top - wndRect.top;
   bottomM = wndRect.bottom - screenRect.bottom;
}