I am trying to make a kind of popup notification window that slides out of the task bar.
At the moment I am only trying to get it to work if the taskbar is on bottom of screen, I have it working like it should.
But the problem im having is when the window is starting to appear/slide the bottom part of it flickers (depending on how big i have set my m_nIncrement value, it flashes the bottom area the same size as the m_nIncrement value)
The window disappears fine with no flicker.
//MyWindow
WNDCLASS wc =
{
CS_HREDRAW | CS_VREDRAW, __sWndProcDlg, 0, 0, g_hInst, nullptr,
LoadCursor(nullptr, IDC_ARROW), (HBRUSH)::GetStockObject(BLACK_BRUSH),
nullptr, m_lpszClassName
};
if (!RegisterClass(&wc))
return;
m_hWnd = CreateWindowEx(WS_EX_NOACTIVATE, m_lpszClassName, NULL, WS_POPUP | WS_VISIBLE, 0, 0, 0, 0, m_hWndParent, NULL, g_hInst, NULL);
//ShowWindow
void _ShowWindow(int _show)
{
unsigned int nDesktopWidth = m_rcDesktop.right - m_rcDesktop.left;
unsigned int nDesktopHeight = m_rcDesktop.bottom - m_rcDesktop.top;
unsigned int nScreenWidth = ::GetSystemMetrics(SM_CXSCREEN);
unsigned int nScreenHeight = ::GetSystemMetrics(SM_CYSCREEN);
BOOL bTaskbarOnRight = nDesktopWidth<nScreenWidth && m_rcDesktop.left == 0;
BOOL bTaskbarOnLeft = nDesktopWidth<nScreenWidth && m_rcDesktop.left != 0;
BOOL bTaskBarOnTop = nDesktopHeight<nScreenHeight && m_rcDesktop.top != 0;
BOOL bTaskbarOnBottom = nDesktopHeight<nScreenHeight && m_rcDesktop.top == 0;
if (_show)
{
ShowWindow(m_hWnd, SW_SHOW);
if (bTaskbarOnBottom)
{
m_nCurrentPos.cx = m_rcDesktop.right - m_sMaxSize.cx;
m_nCurrentPos.cy = m_rcDesktop.bottom - m_nCurrentSize.cy;
m_nTaskbarPlacement = TASKBAR_ON_BOTTOM;
}
KillTimer(m_hWnd, IDT_DISAPPEARING);
SetTimer(m_hWnd, IDT_APPEARING, 1, nullptr);
}
else
{
KillTimer(m_hWnd, IDT_APPEARING);
if (bTaskbarOnRight)
m_nCurrentPos.cx = m_rcDesktop.right - m_sMaxSize.cx;
else if (bTaskbarOnLeft)
m_nCurrentPos.cx = m_rcDesktop.left;
else if (bTaskBarOnTop)
m_nCurrentPos.cy = m_rcDesktop.top;
else //if (bTaskbarOnBottom)
m_nCurrentPos.cy = m_rcDesktop.bottom - m_nCurrentSize.cy;
SetTimer(m_hWnd, IDT_DISAPPEARING, 1, NULL);
}
}
//__OnTimer
LRESULT __OnTimer(HWND hWnd, UINT nIDEvent)
{
int m_nIncrement = 20;
if (nIDEvent == IDT_APPEARING)
{
switch (m_nTaskbarPlacement)
{
case TASKBAR_ON_BOTTOM:
if (m_nCurrentPos.cy > (m_rcDesktop.bottom - m_sMaxSize.cy))
{
m_nCurrentPos.cy -= m_nIncrement;
m_nCurrentSize.cy = m_rcDesktop.bottom - m_nCurrentPos.cy;
}
else
KillTimer(hWnd, IDT_APPEARING);
break;
}
SetFocus(hWnd);
SetWindowPos(hWnd, HWND_TOPMOST, m_nCurrentPos.cx, m_nCurrentPos.cy, m_sMaxSize.cx, m_nCurrentSize.cy, SWP_NOOWNERZORDER | SWP_NOZORDER | SWP_NOACTIVATE);
}
else if (nIDEvent == IDT_DISAPPEARING)
{
switch (m_nTaskbarPlacement)
{
case TASKBAR_ON_BOTTOM:
if (m_nCurrentPos.cy < m_rcDesktop.bottom)
{
m_nCurrentPos.cy += m_nIncrement;
m_nCurrentSize.cy = m_rcDesktop.bottom - m_nCurrentPos.cy;
}
else
{
KillTimer(hWnd, IDT_DISAPPEARING);
MoveWindow(m_hWnd, 0, 0, 0, 0, FALSE);
ShowWindow(m_hWnd, SW_HIDE);
}
break;
}
SetWindowPos(hWnd, HWND_TOPMOST, m_nCurrentPos.cx, m_nCurrentPos.cy, m_sMaxSize.cx, m_nCurrentSize.cy, SWP_NOOWNERZORDER | SWP_NOZORDER | SWP_NOACTIVATE);
}
return true;
}
use AnimateWindow instead. it is easy to use. you may need to handle WM_PRINT, and this also is quit straightforward.
if ever you want to keep working on your code then:
1) remove from popup class the flags CS_HREDRAW & CS_VREDRAW
2) handle WM_ERASEBACKGROUND
finally. if it is a popup window, do not call SetFocus(); maybe you have to set zorder to TOP_MOST
good luck
Related
What I am trying to do is combining the regions of the top windows and checking if the specified window is present in the region if it is then displaying result. It does not giving results very accurately. And also I have problem when windows are non-overlapped. Does any one have any idea how to overcome this situation.
p is the foreground process
while (p != NULL)
{
if (IsWindowVisible(p)) {
if ((GetWindowLongPtr(p, GWL_STYLE) & WS_ICONIC) || GetWindowLong(p, GWL_EXSTYLE) & WS_EX_TOOLWINDOW) {
}
else
{
RECT a;
if (GetWindowText(p, str, 255)) {
if ((_wcsicmp(str, _T("Program Manager"))))
{
GetWindowThreadProcessId(p, &proc_id);
proc_hnd = OpenProcess(PROCESS_ALL_ACCESS, TRUE, proc_id);
flag = GetProcessImageFileName(proc_hnd, proc_name, 1024);
wstring test(&proc_name[0]); //convert to wstring
string test2(test.begin(), test.end());
LOGGER->info(test2);
GetWindowRect(p, &a);
z = CreateRectRgn(a.left, a.top, a.right, a.bottom);
if (wcsstr(proc_name, L"chrome.exe")) {
RECT op;
GetWindowRect(p, &op);
HRGN j1 = CreateRectRgn(op.left, op.top, op.right, op.bottom);
CombineRgn(j1, j1, y, RGN_DIFF); emphasized text
CombineRgn(y, y, z, RGN_OR); //combining the region
switch (GetRgnBox(j1, &a))
{
case NULLREGION:
LOGGER->info("null region");
break;
case SIMPLEREGION:
LOGGER->info("simple region");
break;
case COMPLEXREGION:
LOGGER->info("complex region");
break;
default:
LOGGER->info("default region");
}
}
else
{
CombineRgn(y, y, z, RGN_OR); //combining the region
}
}
}
}
}
p = GetWindow(p, GW_HWNDNEXT); //getting the next window
}
I use the IsOverlapped sample here, but it is used to detect whether it is overlapped by any window. I modified this sample to check whether the window is visible:
BOOL IsVisible(HWND window)
{
HWND hWnd = window;
RECT thisRect;
if (!IsWindowVisible(window))
return FALSE;
GetWindowRect(window, &thisRect);
HWND explorer = FindWindow(L"Shell_TrayWnd", NULL);
DWORD explorer_pid;
GetWindowThreadProcessId(explorer, &explorer_pid);
HRGN hrgn_above = CreateRectRgn(0, 0, 0, 0);
HRGN hrgn_window = CreateRectRgnIndirect(&thisRect);
while ((hWnd = GetWindow(hWnd, GW_HWNDPREV)) != NULL)
{
DWORD pid;
GetWindowThreadProcessId(hWnd, &pid);
if (pid == explorer_pid || !IsWindowVisible(hWnd))
continue;
RECT rc = {};
GetWindowRect(hWnd, &rc);
HRGN hrgn_hWnd = CreateRectRgn(rc.left, rc.top, rc.right, rc.bottom);
CombineRgn(hrgn_above, hrgn_above, hrgn_hWnd, RGN_OR);
DeleteObject(hrgn_hWnd);
}
int ret = CombineRgn(hrgn_window, hrgn_window, hrgn_above, RGN_DIFF);
DeleteObject(hrgn_above);
DeleteObject(hrgn_window);
if (ret != NULLREGION && ret)
return TRUE;
return FALSE;
}
Use GetWindow + GW_HWNDPREV to get the windows list above the hWnd in Z order.
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I tried to follow the example found:
Capturing an image from a minimized window
My code:
#include <iostream>
#include <string>
#include <windows.h>
#include <gdiplus.h>
#pragma comment(lib, "gdiplus.lib")
#pragma warning(disable : 4996)
using namespace std;
using namespace Gdiplus;
int GetEncoderClsid(LPCWSTR format, CLSID* pClsid)
{
unsigned int num = 0, size = 0;
GetImageEncodersSize(&num, &size);
if (size == 0) return -1;
ImageCodecInfo* pImageCodecInfo = (ImageCodecInfo*)(malloc(size));
if (pImageCodecInfo == NULL) return -1;
GetImageEncoders(num, size, pImageCodecInfo);
for (unsigned int j = 0; j < num; ++j) {
if (wcscmp(pImageCodecInfo[j].MimeType, format) == 0) {
*pClsid = pImageCodecInfo[j].Clsid;
free(pImageCodecInfo);
return j;
}
}
free(pImageCodecInfo);
return -1;
}
int SaveScreenshot(string filename, ULONG uQuality, HWND hwnd) // by Napalm
{
ULONG_PTR gdiplusToken;
GdiplusStartupInput gdiplusStartupInput;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
HWND hMyWnd = hwnd;
//HWND hMyWnd = GetDesktopWindow();
RECT r;
int w, h;
HDC dc, hdcCapture;
int nBPP, nCapture, iRes;
LPBYTE lpCapture;
CLSID imageCLSID;
Bitmap* pScreenShot;
// get the area of my application's window
GetWindowRect(hMyWnd, &r);
dc = GetWindowDC(hMyWnd); // GetDC(hMyWnd) ;
w = r.right - r.left;
h = r.bottom - r.top;
nBPP = GetDeviceCaps(dc, BITSPIXEL);
hdcCapture = CreateCompatibleDC(dc);
// create the buffer for the screenshot
BITMAPINFO bmiCapture = { sizeof(BITMAPINFOHEADER), w, -h, 1, nBPP, BI_RGB, 0, 0, 0, 0, 0, };
// create a container and take the screenshot
HBITMAP hbmCapture = CreateDIBSection(dc, &bmiCapture, DIB_PAL_COLORS, (LPVOID*)&lpCapture, NULL, 0);
// failed to take it
if (!hbmCapture) {
DeleteDC(hdcCapture);
DeleteDC(dc);
GdiplusShutdown(gdiplusToken);
printf("failed to take the screenshot. err: %d\n", GetLastError());
return 0;
}
// copy the screenshot buffer
nCapture = SaveDC(hdcCapture);
SelectObject(hdcCapture, hbmCapture);
BitBlt(hdcCapture, 0, 0, w, h, dc, 0, 0, SRCCOPY);
RestoreDC(hdcCapture, nCapture);
DeleteDC(hdcCapture);
DeleteDC(dc);
// save the buffer to a file
pScreenShot = new Bitmap(hbmCapture, (HPALETTE)NULL);
EncoderParameters encoderParams;
encoderParams.Count = 1;
encoderParams.Parameter[0].NumberOfValues = 1;
encoderParams.Parameter[0].Guid = EncoderQuality;
encoderParams.Parameter[0].Type = EncoderParameterValueTypeLong;
encoderParams.Parameter[0].Value = &uQuality;
GetEncoderClsid(L"image/jpeg", &imageCLSID);
wchar_t* lpszFilename = new wchar_t[filename.length() + 1];
mbstowcs(lpszFilename, filename.c_str(), filename.length() + 1);
iRes = (pScreenShot->Save(lpszFilename, &imageCLSID, &encoderParams) == Ok);
delete pScreenShot;
DeleteObject(hbmCapture);
GdiplusShutdown(gdiplusToken);
return iRes;
}
int main() {
HWND hWnd;
hWnd = FindWindowA(NULL, "txt.txt - Bloco de Notas");
WINDOWPLACEMENT wp = { 0 };
wp.length = sizeof(WINDOWPLACEMENT);
GetWindowPlacement(hWnd, &wp);
ANIMATIONINFO ai = { 0 };
bool restoreAnimated = false;
if (wp.showCmd == SW_SHOWMINIMIZED)
{
ai.cbSize = sizeof(ANIMATIONINFO);
SystemParametersInfo(SPI_GETANIMATION, sizeof(ANIMATIONINFO), &ai, 0);
if (ai.iMinAnimate != 0)
{
ai.iMinAnimate = 0;
SystemParametersInfo(SPI_SETANIMATION, sizeof(ANIMATIONINFO), &ai, 0);
restoreAnimated = true;
}
// optionally move the window off-screen, or
// apply alpha using SetLayeredWindowAttributes()...
ShowWindow(hWnd, SW_SHOWNOACTIVATE);
}
// capture as needed ...
string path = "C:\\Users\\CAIO\\Desktop\\screenshot.jpg";
ULONG quality = 100;
SaveScreenshot(path, quality, hWnd);
if (wp.showCmd == SW_SHOWMINIMIZED)
{
SetWindowPlacement(hWnd, &wp);
// optionally remove alpha using SetLayeredWindowAttributes()...
if (restoreAnimated)
{
ai.iMinAnimate = 1;
SystemParametersInfo(SPI_SETANIMATION, sizeof(ANIMATIONINFO), &ai, 0);
}
}
return 0;
}
In her code there's restoreAnimation = true; and if (restoreAnimation) did he mean restoreAnimated?
With the code above it still shown the window for a sec, also the captured image is all black (maybe captured while minimized) or is not captured properly.
https://youtu.be/8b1wXxtaXsY?t=9
Sec 8 and 9 from the video you can see the window is being shown on the screen.
Suggestions?
did he mean restoreAnimated?
I think yes.
This code from #Remy only disables the animation effects when minimizing and restoring, the window will still be displayed for a short time when restoring. As the answer pointed out, you can use SetLayeredWindowAttributes to make the window nearly completely transparent(It should be noted that using SetLayeredWindowAttributes needs to ensure that hwnd has WS_EX_LAYERED style.) and then you will not see the window, but the operating system will.
In addition, the problem of incomplete window capture is because the window is not drawn completely, call UpdateWindow after ShowWindow works for me, it will send a WM_PAINT message to the window.
bool restoreAnimated = false;
BYTE Alph = 0;
LONG_PTR exstyle = 0;
if (wp.showCmd == SW_SHOWMINIMIZED)
{
ai.cbSize = sizeof(ANIMATIONINFO);
SystemParametersInfo(SPI_GETANIMATION, sizeof(ANIMATIONINFO), &ai, 0);
if (ai.iMinAnimate != 0)
{
ai.iMinAnimate = 0;
SystemParametersInfo(SPI_SETANIMATION, sizeof(ANIMATIONINFO), &ai, 0);
restoreAnimated = true;
}
// optionally move the window off-screen, or
// apply alpha using SetLayeredWindowAttributes()...
exstyle = GetWindowLongPtr(hWnd, GWL_EXSTYLE);
SetWindowLongPtr(hWnd, GWL_EXSTYLE, exstyle | WS_EX_LAYERED);
DWORD flag;
BOOL ret = GetLayeredWindowAttributes(hWnd, 0, &Alph, 0);
SetLayeredWindowAttributes(hWnd, 0, 1, LWA_ALPHA);
ShowWindow(hWnd, SW_SHOWNOACTIVATE);
UpdateWindow(hWnd);
}
// capture as needed ...
string path = "C:\\Users\\name\\Desktop\\screenshot.jpg";
ULONG quality = 100;
SaveScreenshot(path, quality, hWnd);
if (wp.showCmd == SW_SHOWMINIMIZED)
{
SetWindowPlacement(hWnd, &wp);
// optionally remove alpha using SetLayeredWindowAttributes()...
SetLayeredWindowAttributes(hWnd, 0, Alph, LWA_ALPHA);
SetWindowLongPtr(hWnd, GWL_EXSTYLE, exstyle);
if (restoreAnimated)
{
ai.iMinAnimate = 1;
SystemParametersInfo(SPI_SETANIMATION, sizeof(ANIMATIONINFO), &ai, 0);
}
}
While trying to create an application that correctly supports per-monitor DPI-awareness version 2, I encountered an issue where my application's window's client area size was incorrect when started on a monitor, where DPI scaling was enabled.
I leave choosing the appropriate location for the window up to Windows, so I can't know on which monitor the window is going to be created, thus I'm also unable to know the DPI I should scale for before the creation of the window.
The solution to this is that I obtain the DPI for the monitor, once the window has been created, using GetDpiForWindow and set the size, so it matches the client area size I desire. In this case I want the client area to be scaled - for example 300x150 client area when on a 125% display should be 375x187.
The DPI is obtained correctly (120 in my case), but using SetWindowPos means that I have to account for the window borders, titlebar, etc. For that purpose I use AdjustWindowRectExForDpi, which accounts for the DPI scaling of the window borders.
To my surprise, the resulting client area size still is 300x150, when the application is started on a DPI-scaled monitor. Starting the application on a non-DPI-scaled monitor and then moving it to one that is, results in a correct client area size.
Minimal example:
#include <Windows.h>
LRESULT CALLBACK startup_window_procedure(HWND window, UINT message, WPARAM w_param, LPARAM l_param)
{
switch (message)
{
case WM_DESTROY:
{
PostQuitMessage(0);
return 0;
}
case WM_DPICHANGED:
{
// Resize the window
RECT* new_rect = reinterpret_cast<RECT*>(l_param);
if (!SetWindowPos(window, nullptr, new_rect->left, new_rect->top, new_rect->right - new_rect->left, new_rect->bottom - new_rect->top, SWP_NOZORDER | SWP_NOACTIVATE))
{
return 1;
}
return 0;
}
}
return DefWindowProcW(window, message, w_param, l_param);
}
int CALLBACK wWinMain(HINSTANCE instance, HINSTANCE prev_instance, PWSTR cmd_line, int cmd_show)
{
constexpr auto window_class_name = L"example_dialog";
constexpr auto window_style = WS_OVERLAPPEDWINDOW;
// Enable per-monitor DPI-awareness version 2
if (!SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2))
{
return 1;
}
// Create the window
WNDCLASSEXW window_class;
window_class.cbSize = sizeof(window_class);
window_class.style = CS_HREDRAW | CS_VREDRAW;
window_class.lpfnWndProc = startup_window_procedure;
window_class.cbClsExtra = 0;
window_class.cbWndExtra = 0;
window_class.hInstance = instance;
window_class.hIcon = nullptr;
window_class.hCursor = nullptr;
window_class.hbrBackground = reinterpret_cast<HBRUSH>(COLOR_WINDOW + 1);
window_class.lpszMenuName = nullptr;
window_class.lpszClassName = window_class_name;
window_class.hIconSm = nullptr;
if (!RegisterClassExW(&window_class))
{
return 1;
}
HWND window = CreateWindowExW(0, window_class_name, L"Example window", window_style, CW_USEDEFAULT, CW_USEDEFAULT, 0, 0, nullptr, nullptr, instance, nullptr);
if (!window)
{
return 1;
}
UINT dpi = GetDpiForWindow(window);
// Actually set the appropriate window size
RECT scaled_size;
scaled_size.left = 0;
scaled_size.top = 0;
scaled_size.right = 300;
scaled_size.bottom = 150;
if (!AdjustWindowRectExForDpi(&scaled_size, window_style, false, 0, dpi))
{
return 1;
}
if (!SetWindowPos(window, nullptr, 0, 0, scaled_size.right - scaled_size.left, scaled_size.bottom - scaled_size.top, SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOMOVE))
{
return 1;
}
ShowWindow(window, SW_SHOWNORMAL);
// Message loop
MSG message;
int result;
while ((result = GetMessageW(&message, nullptr, 0, 0)) != 0)
{
if (result == -1)
{
return 1;
}
else
{
TranslateMessage(&message);
DispatchMessageW(&message);
}
}
return static_cast<int>(message.wParam);
}
The example requires at least Windows 10 1607 to run and Windows SDK 14393 to compile.
How do I properly scale the client area size, when the application is started on a DPI-scaled monitor?
AdjustWindowRectExForDpi doesn't adjust the client area size, though it does account for the increased size of window borders and the title bar, when the non-client area of a window is DPI-scaled. This means that you must scale the client area size yourself.
The example's code can be modified to scale the client area size manually like this:
// Calculate the scaling factor. 96 is the default Windows DPI, unless DPI scaling is enabled.
float scaling_factor = static_cast<float>(dpi) / 96;
RECT scaled_size;
scaled_size.left = 0;
scaled_size.top = 0;
scaled_size.right = static_cast<LONG>(300 * scaling_factor);
scaled_size.bottom = static_cast<LONG>(150 * scaling_factor);
if (!AdjustWindowRectExForDpi(&scaled_size, window_style, false, 0, dpi))
{
return 1;
}
if (!SetWindowPos(window, nullptr, 0, 0, scaled_size.right - scaled_size.left, scaled_size.bottom - scaled_size.top, SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOMOVE))
{
return 1;
}
In order to draw the icon on the caption title bar, I have refereed this MSDN article and used DWM API to create my customize client area by calling DwmExtendFrameIntoClientArea.
my code:
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);
}
The result under Windows 7 is fine.
However, my window appears another unknown caption title bar under Windows 10.
I found out the unknown caption is caused by WS_THICKFRAME in the cs.style.
If I remove WS_THICKFRAME, the unknown cation bar will disappear, but I cannot resizing the border of my window. Furthermore, my program cannot capture the minimum, maximum and the close button message on my custom caption bar anymore.
I want to remove the unknown title bar without any side effect.
Does anyone could provide me a good solution or suggestion?
Best Regards,
When using DwmExtendFrameIntoClientArea, it means frame is extended in to client area. It is no longer in non-client area. So there is no need to override OnNcPaint, you can do all of the painting in OnPaint
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;
}
Use a member variable CRect m_border to keep track of border's thickness. You can use AdjustWindowRectEx to find the thickness of the borders.
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 will be for example {7,7,7,7};
Allow Windows to do the painting on left, right, bottom border. The top border is the only one changed
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);
}
}
see also How to glow the minimum. maximum and close button?
I have create a custom scroll bar with transparency option. The way this transparency works is very simple, I invalidate the required region and let the parent to erase and paint itself, after that I repaint the scroll bar itself. Here's some piece of code:
void Refresh(bool bForceOwnerRedraw)
{
if (Gui.OwnerRedraw || bForceOwnerRedraw)
InvalidateBackgroundRegion(State.CurrentState);
RedrawWindow(Gui.OwnerWindow, &Gui.DrawingRectangle, NULL, RDW_INVALIDATE | RDW_NOERASE | RDW_INTERNALPAINT);
}
void InvalidateBackgroundRegion(DWORD State)
{
HWND hWndParent = GetParent(Gui.OwnerWindow);
POINT p = {0};
MapWindowPoints(Gui.OwnerWindow, hWndParent, &p, 1);
HRGN BackGroundRegion = CreateRectRgn(Gui.DrawingRectangle.left + p.x, Gui.DrawingRectangle.top + p.y, Gui.DrawingRectangle.right + p.x, Gui.DrawingRectangle.bottom + p.y);
HRGN MainRegion = NULL;
if (State & SELECTED || State & SELECTED_HOVER)
{
int Width = Gui.DrawingRectangle.left + Position.SelectedState.MainDrawing.right + p.x + 1,
Height = Gui.DrawingRectangle.top + Position.SelectedState.MainDrawing.bottom + p.y + 1;
MainRegion = CreateRoundRectRgn(Position.SelectedState.MainDrawing.left + Gui.DrawingRectangle.left + p.x, Position.SelectedState.MainDrawing.top + Gui.DrawingRectangle.top + p.y, Width, Height, Gui.uiCornerRoundness, Gui.uiCornerRoundness);
}
else if (State & UNSELECTED || State & UNSELECTED_HOVER)
{
int Width = Gui.DrawingRectangle.left + Position.UnselectedState.MainDrawing.right + p.x + 1,
Height = Gui.DrawingRectangle.top + Position.UnselectedState.MainDrawing.bottom + p.y + 1;
MainRegion = CreateRoundRectRgn(Position.UnselectedState.MainDrawing.left+Gui.DrawingRectangle.left+p.x, Position.UnselectedState.MainDrawing.top+Gui.DrawingRectangle.top+p.y, Width, Height, Gui.uiCornerRoundness, Gui.uiCornerRoundness);
}
else if (State & INTERMEDIATE || State & INTERMEDIATE_HOVER)
{
int Width = Gui.DrawingRectangle.left + Position.IntermediateState.MainDrawing.right + p.x + 1,
Height = Gui.DrawingRectangle.top + Position.IntermediateState.MainDrawing.bottom + p.y + 1;
MainRegion = CreateRoundRectRgn(Position.IntermediateState.MainDrawing.left + Gui.DrawingRectangle.left + p.x, Position.IntermediateState.MainDrawing.top + Gui.DrawingRectangle.top + p.y, Width, Height, Gui.uiCornerRoundness, Gui.uiCornerRoundness);
}
CombineRgn(BackGroundRegion, BackGroundRegion, MainRegion, RGN_DIFF);
RedrawWindow(hWndParent, NULL, BackGroundRegion, RDW_INVALIDATE | RDW_ERASE | RDW_INTERNALPAINT);
DeleteObject(MainRegion);
DeleteObject(BackGroundRegion);
}
The problem occurs when I resize the main window, everything flickers. However I can prevent that by using WS_CLIPCHILDREN flag on main window, but then my scroll bar looses it's transparency, because I no longer can't invalidate parts, that are owned by child windows.
What I have tried so far:
Before invalidating parent, I removed WS_CLIPCHILDREN flag, repainted, and then set WS_CLIPCHILDREN flag back. [Result: It worked, however my CPU usage went over 30%, so it's a no no.]
Tried validating child windows (without WS_CLIPCHILDREN), before erasing and repainting.
[Result: didn't work, don't know why... maybe I... nope no idea.]
Completely disabled all repainting in my scroll bar (without WS_CLIPCHILDREN) [Result: didn't work, still flickers.]
What I would like to achieve here is to find a way to to bypass WS_CLIPCHILDREN by invalidating window manually (maybe somehow invalidating using SendMessage() to bypass it). Any other suggestion are also welcome. Thanks
EDIT:
Some more information about how I create my scroll bar. In the code below you can see that my scroll bar is just an empty child window with WS_VISIBLE and WS_CHILD flags, all of the painting is done using good old gdi.
void RegisterScrollbarClass()
{
if (RegisteredClasses.bCustomScrollBar)
return;
WNDCLASSEX wc;
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = BaseWindow::stWinMsgHandler;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = NULL;
wc.hIcon = NULL;
wc.hCursor = NULL;
wc.hbrBackground = NULL;
wc.lpszMenuName = NULL;
wc.lpszClassName = TEXT("CUSTOM_SCROLLBAR");
wc.hIconSm = NULL;
if (!RegisterClassEx(&wc))
{
MessageBox(NULL, TEXT("Button Class Registration Failed!"), TEXT("ERROR!"), MB_ICONERROR);
exit(EXIT_FAILURE);
}
RegisteredClasses.bCustomScrollBar = true;
}
HWND CreateScrollbar(DWORD dwExStyle, LPCTSTR lpClassName, LPCTSTR lpWindowName, DWORD dwStyle, int x, int y, int nWidth, int nHeight, HWND hWndParent, HMENU hMenu, HINSTANCE hInstance, LPVOID lpParam)
{
DWORD ScrollbarStyle = NULL, Child = NULL;
if ((dwStyle & SB_VERT) == SB_VERT)
ScrollbarStyle = SB_VERT;
else if ((dwStyle & SB_HORZ) == SB_HORZ)
ScrollbarStyle = SB_HORZ;
else
return NULL;
if ((dwStyle & WS_CHILD) == WS_CHILD)
Child = WS_CHILD;
if ((dwStyle & WS_VISIBLE) == WS_VISIBLE)
Child |= WS_VISIBLE;
RegisterScrollbarClass();
Scrollbar.push_back(CustomScrollbar(ScrollbarStyle, x, y, nWidth, nHeight, (int)hMenu));
for(unsigned int i = 0; i < Scrollbar.size(); i++)
Scrollbar.at(i).Create();
if (Scrollbar.at(Scrollbar.size()-1).Create(dwExStyle, lpClassName, NULL, Child, x, y, nWidth, nHeight, hWndParent, hMenu, hInstance, lpParam) != NULL)
{
if (Scrollbar.size() == 2)
Scrollbar.at(Scrollbar.size() - 1).EnableTransparent(true);
return Scrollbar.at(Scrollbar.size()-1).WindowHandle();
}
else
{
Scrollbar.pop_back();
return NULL;
}
}
Here you can download sample program: http://www.putlocker.com/file/B8704C613BC7EC96
SOLVED:
Thanks to Raymond Chen, I have removed CS_HREDRAW | CS_VREDRAW from my Scroll bar class and I works like a charm without WS_CLIPCHILDREN.