133 lines
3.5 KiB
C++
133 lines
3.5 KiB
C++
/*
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// Sample demonstrating interoperability of OpenCV UMat with Direct X surface
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// Base class for Windows application
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*/
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <string>
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#define WINCLASS "WinAppWnd"
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class WinApp
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{
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public:
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WinApp(int width, int height, std::string& window_name)
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{
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m_width = width;
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m_height = height;
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m_window_name = window_name;
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m_hInstance = ::GetModuleHandle(NULL);
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m_hWnd = 0;
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}
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virtual ~WinApp() {}
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virtual int create()
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{
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WNDCLASSEX wcex;
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wcex.cbSize = sizeof(WNDCLASSEX);
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wcex.style = CS_HREDRAW | CS_VREDRAW;
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wcex.lpfnWndProc = &WinApp::StaticWndProc;
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wcex.cbClsExtra = 0;
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wcex.cbWndExtra = 0;
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wcex.hInstance = m_hInstance;
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wcex.hIcon = LoadIcon(0, IDI_APPLICATION);
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wcex.hCursor = LoadCursor(0, IDC_ARROW);
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wcex.hbrBackground = 0;
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wcex.lpszMenuName = 0L;
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wcex.lpszClassName = WINCLASS;
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wcex.hIconSm = 0;
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ATOM wc = ::RegisterClassEx(&wcex);
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if (!wc)
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return -1;
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RECT rc = { 0, 0, m_width, m_height };
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if(!::AdjustWindowRect(&rc, WS_OVERLAPPEDWINDOW, false))
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return -1;
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m_hWnd = ::CreateWindow(
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(LPCTSTR)wc, m_window_name.c_str(),
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WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,
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rc.right - rc.left, rc.bottom - rc.top,
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NULL, NULL, m_hInstance, (void*)this);
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if (!m_hWnd)
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return -1;
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::ShowWindow(m_hWnd, SW_SHOW);
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::UpdateWindow(m_hWnd);
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::SetFocus(m_hWnd);
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return 0;
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} // create()
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int run()
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{
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MSG msg;
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::ZeroMemory(&msg, sizeof(msg));
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while (msg.message != WM_QUIT)
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{
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if (::PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
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{
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::TranslateMessage(&msg);
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::DispatchMessage(&msg);
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}
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else
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{
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idle();
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}
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}
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return static_cast<int>(msg.wParam);
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} // run()
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virtual int cleanup()
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{
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::DestroyWindow(m_hWnd);
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::UnregisterClass(WINCLASS, m_hInstance);
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return 0;
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} // cleanup()
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protected:
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// dispatch message handling to method of class
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static LRESULT CALLBACK StaticWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
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{
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WinApp* pWnd;
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if (message == WM_NCCREATE)
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{
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LPCREATESTRUCT pCreateStruct = reinterpret_cast<LPCREATESTRUCT>(lParam);
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pWnd = static_cast<WinApp*>(pCreateStruct->lpCreateParams);
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::SetWindowLongPtr(hWnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(pWnd));
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}
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pWnd = GetObjectFromWindow(hWnd);
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if (pWnd)
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return pWnd->WndProc(hWnd, message, wParam, lParam);
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else
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return ::DefWindowProc(hWnd, message, wParam, lParam);
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} // StaticWndProc()
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inline static WinApp* GetObjectFromWindow(HWND hWnd) { return (WinApp*)::GetWindowLongPtr(hWnd, GWLP_USERDATA); }
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// actual wnd message handling
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virtual LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) = 0;
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// idle processing
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virtual int idle() = 0;
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HINSTANCE m_hInstance;
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HWND m_hWnd;
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int m_width;
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int m_height;
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std::string m_window_name;
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};
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