[英]An Aero caption title bar issue using DWM API on the windows 10
為了在標題欄上繪制圖標,我參考了這篇 MSDN 文章並使用 DWM API 通過調用 DwmExtendFrameIntoClientArea 來創建我的自定義客戶區。
我的代碼:
CMainFrame::CMainFrame()
{
Gdiplus::GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
BOOL fDwmEnabled = FALSE;
if (SUCCEEDED(DwmIsCompositionEnabled(&fDwmEnabled)))
TRACE0("DWM is enabled\n");
TCHAR szLogoPath[MAX_PATH];
GetModuleFileName ( GetModuleHandle(NULL), szLogoPath, _countof(szLogoPath) );
PathRemoveFileSpec ( szLogoPath );
PathAppend ( szLogoPath, _T("lena.bmp") );
m_pLogoImage = m_pLogoImage->FromFile ( CT2CW(szLogoPath) );
if(NULL == m_pLogoImage)
TRACE0("load image fail\n");
}
void CMainFrame::OnNcCalcSize(BOOL bCalcValidRects, NCCALCSIZE_PARAMS* lpncsp)
{
int xFrame = 2;
int yFrame = 2;
int nTHight = 30;
NCCALCSIZE_PARAMS * p;
RECT * rc;
RECT aRect;
RECT bRect;
RECT acRect;
p = (NCCALCSIZE_PARAMS *)lpncsp;
CopyRect(&bRect,&p->rgrc[1]);
CopyRect(&aRect,&p->rgrc[0]);
acRect.left = aRect.left + xFrame;
acRect.top = aRect.top - nTHight;
acRect.right = aRect.right - xFrame;
acRect.bottom = aRect.bottom - yFrame;
CopyRect(&p->rgrc[0],&acRect);
CopyRect(&p->rgrc[1],&aRect);
CopyRect(&p->rgrc[2],&bRect);
CFrameWnd::OnNcCalcSize(TRUE, lpncsp);
}
LRESULT CMainFrame::OnNcHitTest(CPoint p)
{
BOOL dwm_enabled = FALSE;
if (SUCCEEDED(DwmIsCompositionEnabled(&dwm_enabled)))
{
LRESULT result = 0;
if (!DwmDefWindowProc(m_hWnd, WM_NCHITTEST, 0, MAKELPARAM(p.x, p.y), &result))
result = HitTestNCA(m_hWnd, p);
if (result == HTNOWHERE && GetForegroundWindow() != this)
{
return HTCAPTION;
}
return result;
}
return CWnd::OnNcHitTest(p);
}
BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
if(cs.hMenu!=NULL)
{
::DestroyMenu(cs.hMenu);
cs.hMenu = NULL ;
}
if( !CFrameWnd::PreCreateWindow(cs) )
return FALSE;
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs
cs.style = WS_CAPTION | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_OVERLAPPED| WS_SYSMENU | WS_THICKFRAME;
cs.dwExStyle &= ~WS_EX_CLIENTEDGE;
cs.lpszClass = AfxRegisterWndClass(0);
return TRUE;
}
void CMainFrame::OnActivate(UINT nState,CWnd* pWndOther,BOOL bMinimized )
{
CFrameWnd::OnActivate(nState,pWndOther,bMinimized);
BOOL fDwmEnabled = FALSE;
if (SUCCEEDED(DwmIsCompositionEnabled(&fDwmEnabled)))
{
if(nState == WA_ACTIVE )
{
MARGINS margins = {-1};
/*margins.cyTopHeight = 30;
margins.cxLeftWidth = 0;
margins.cxRightWidth = 0;
margins.cyBottomHeight = 0;*/
HRESULT hr = DwmExtendFrameIntoClientArea(m_hWnd, &margins);
if (!SUCCEEDED(hr))
TRACE0("Failed in DwmExtendFrameIntoClientArea\n");
}
}
}
void CMainFrame::OnNcPaint()
{
CFrameWnd::OnPaint();
CDC* dc = GetWindowDC();
RECT rcClient;
GetWindowRect(&rcClient);
dc->FillSolidRect(0,0,RECTWIDTH(rcClient),RECTHEIGHT(rcClient),RGB(255,0,0));
CPaintDC gdc(this); // device context for painting
Graphics gr(gdc.m_hDC);
gr.DrawImage ( m_pLogoImage, 0, 0 );
ReleaseDC(dc);
}
但是,我的窗口在 Windows 10 下出現了另一個未知的標題欄。
我發現未知標題是由 cs.style 中的 WS_THICKFRAME 引起的。 如果我刪除 WS_THICKFRAME,未知陽離子條將消失,但我無法調整窗口邊框的大小。 此外,我的程序無法再捕獲自定義標題欄上的最小值、最大值和關閉按鈕消息。 我想在沒有任何副作用的情況下刪除未知的標題欄。 有沒有人可以為我提供一個好的解決方案或建議?
此致,
當使用DwmExtendFrameIntoClientArea
,這意味着框架擴展到客戶區。 它不再位於非客戶區。 所以不需要覆蓋OnNcPaint
,你可以在OnPaint
完成所有的繪畫
void CMainFrame::OnPaint()
{
CPaintDC dc(this);
//paint titlebar area (this used to be the non-client area)
CRect rc;
GetClientRect(&rc);
rc.bottom = titlebar_height;
CDC memdc;
memdc.CreateCompatibleDC(&dc);
BITMAPINFOHEADER bmpInfoHeader = {
sizeof(BITMAPINFOHEADER), rc.Width(), -rc.Height(), 1, 32 };
HBITMAP hbitmap = CreateDIBSection(
dc, (BITMAPINFO*)(&bmpInfoHeader), DIB_RGB_COLORS, NULL, NULL, 0);
auto oldbitmap = memdc.SelectObject(hbitmap);
dc.BitBlt(0, 0, rc.Width(), rc.Height(), &memdc, 0, 0, SRCCOPY);
memdc.SelectObject(oldbitmap);
DeleteObject(hbitmap);
//begin normal paint
//The new client area begins below titlebar_height which we define earlier
GetClientRect(&rc);
rc.top = titlebar_height;
dc.FillSolidRect(&rc, RGB(0, 0, 255));
Gdiplus::Image *image = Gdiplus::Image::FromFile(L"file.jpg");
Gdiplus::Graphics gr(dc);
gr.DrawImage(image, 0, 0);
delete image;
}
使用成員變量CRect m_border
來跟蹤邊框的厚度。 您可以使用AdjustWindowRectEx
來查找邊框的粗細。
void CMainFrame::OnActivate(UINT nState, CWnd* pWndOther, BOOL bMinimized)
{
CFrameWnd::OnActivate(nState, pWndOther, bMinimized);
titlebar_height = 100;
//find border thickness
if (GetWindowLongPtr(m_hWnd, GWL_STYLE) & WS_THICKFRAME)
{
m_border = { 0,0,0,0 };
AdjustWindowRectEx(&m_border, GetWindowLongPtr(m_hWnd,
GWL_STYLE) & ~WS_CAPTION, FALSE, NULL);
m_border.left = abs(m_border.left);
m_border.top = abs(m_border.top);
}
else if (GetWindowLongPtr(m_hWnd, GWL_STYLE) & WS_BORDER)
{
m_border = { 1,1,1,1 };
}
else
{
m_border = { 0,0,0,0 };
}
//Extend frame in to client area
MARGINS margins = { 0 };
margins.cyTopHeight = titlebar_height; //<<=== *** edited
DwmExtendFrameIntoClientArea(m_hWnd, &margins);
SetWindowPos(NULL, 0, 0, 0, 0,
SWP_SHOWWINDOW | SWP_NOMOVE | SWP_NOSIZE | SWP_FRAMECHANGED);
}
m_border
將是例如{7,7,7,7}
;
允許 Windows 在左、右、下邊框上進行繪制。 頂部邊框是唯一改變的
void CMainFrame::OnNcCalcSize(BOOL validate, NCCALCSIZE_PARAMS FAR* lpncsp)
{
if (validate)
{
lpncsp->rgrc[0].left += m_border.left;
lpncsp->rgrc[0].right -= m_border.right;
lpncsp->rgrc[0].bottom -= m_border.bottom;
}
else
{
CFrameWnd::OnNcCalcSize(validate, lpncsp);
}
}
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