// Step 4: the Window Procedure
LRESULT CALLBACK WindowProcedure(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_CREATE:
{
g_myWindows.push_back(hwnd);
// if the message is WM_CREATE, the lParam contains a pointer to a CREATESTRUCT
// the CREATESTRUCT can contain userdata in pcs->lpCreateParams
// placing that in the window Userdata can be handy
CREATESTRUCT *pCS = (CREATESTRUCT*)lParam;
SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG)pCS->lpCreateParams);
UserDataWindow *pApp = (UserDataWindow *)GetWindowLongPtr(hwnd, GWLP_USERDATA);
break;
}
case WM_CLOSE:
PostQuitMessage(0);
break;
case WM_DESTROY:
std::cout << "\ndestroying window (delete userdata and remove from list)\n" ;
delete GetUserData(hwnd);
g_myWindows.erase(std::find(g_myWindows.begin(), g_myWindows.end(), hwnd));
//PostQuitMessage(0) ;
return 0L ;
case WM_SIZE: {
LOWORD(lParam); // width
HIWORD(lParam); // height
std::string title(std::to_string(LOWORD(lParam))+"X"+std::to_string(HIWORD(lParam)));
SetWindowText(hwnd, title.c_str());
return DefWindowProc(hwnd, msg, wParam, lParam);
}
case WM_PAINT:
if(GetAsyncKeyState('H') && GetAsyncKeyState('A') )
PostQuitMessage(0);
break;
case WM_KEYDOWN:
if( wParam == 'C')
CaptureAnImage(hwnd);
else if ( wParam == VK_ESCAPE)
PostQuitMessage(0);
if( wParam == 'W')
DestroyWindow(hwnd);
else if( wParam == 'Q')
PostQuitMessage(0);
break;
case WM_NCLBUTTONDOWN:
// DestroyWindow(hwnd);
std::cout << "\nmouse left button down at (" << LOWORD(lParam)
<< ',' << HIWORD(lParam) << ")\n" ;
// fall thru
default:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
return 0;
}
BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lParam)
{
char class_name[80];
char title[80];
GetClassName(hwnd,class_name, sizeof(class_name));
GetWindowText(hwnd,title,sizeof(title));
//std::cout <<"Window title: "<<title<<std::endl;
//std::cout <<"Class name: "<<class_name<<std::endl;
CaptureAnImage(hwnd);
return TRUE;
}
int Screengrab::CaptureImagesOnInterval(HWND hWnd){
std::wstring baseFilename = L"tmp/myscreenshot.";
int i = 0;
while (true){
std::wstringstream stringStream;
stringStream << baseFilename << i << ".bmp";
std::wstring imageFilename = stringStream.str();
CaptureAnImage(hWnd, imageFilename);
Utils::log(imageFilename);
i++;
Sleep(1 * 1000);
}
}
LRESULT CALLBACK CWinApp::WinWinProc(
__in HWND hwnd,
__in UINT uMsg,
__in WPARAM wParam,
__in LPARAM lParam
)
{
switch (uMsg)
{
case WM_CLOSE:
PostQuitMessage(0);
break;
case WM_CHAR:
if (wParam == 0x63)
{
CaptureAnImage(hwnd);
}
break;
default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
return 0;
}