95 lines
2.4 KiB
C++
95 lines
2.4 KiB
C++
#include "Window.h"
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INT Window::init(HINSTANCE hInstance, UINT width, UINT height)
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{
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// 1. describe window class
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WNDCLASS wc = {};
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wc.hInstance = hInstance;
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wc.lpszClassName = TEXT("D3D9");
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wc.lpfnWndProc = WindowProc; // callback function for windows to communicate with our application
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wc.hbrBackground = CreateSolidBrush(RGB(0, 255, 0));
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wc.hCursor = LoadCursor(nullptr, IDC_ARROW);
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wc.hIcon = LoadIcon(nullptr, IDI_APPLICATION);
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wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; // technical behaviour
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// 2. register window class
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if (!RegisterClass(&wc)) return 100;
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// 3. adjust window size (optional)
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DWORD style = {};
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style = WS_OVERLAPPEDWINDOW; // window with border & title
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//style = WS_POPUP; // plain window without any decorations
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// fullscreen
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//width = GetSystemMetrics(SM_CXVIRTUALSCREEN);
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//height = GetSystemMetrics(SM_CYVIRTUALSCREEN);
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RECT rect = { 100, 100, 100 + width, 100 + height }; // left-top corner, right-bottom corner
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AdjustWindowRect(&rect, style, FALSE);
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// 4. create window instance
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_hWnd = CreateWindow(
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wc.lpszClassName, // class name of window class to be instantiated
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wc.lpszClassName, // window title
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style, // visual style
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rect.left, rect.top, // left-top corner position
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rect.right - rect.left, rect.bottom - rect.top, // window size
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nullptr, // handle to parent window
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nullptr, // handle to menu instance
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hInstance,
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nullptr // pointer to optional parameter
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);
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if (_hWnd == nullptr) return 110;
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// 5. show window
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ShowWindow(_hWnd, SW_SHOW);
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SetFocus(_hWnd);
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return 0;
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}
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BOOL Window::run()
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{
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// 6. run window
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// GetMessage - synchronous call which holds until a new message arrives
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// PeekMessage - get last message from message queue or nothing if there is no one left
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// TranslateMessage - translates keyboard input (scan code -> virtual key code)
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// DispatchMessage - send message to WindowProcedure
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MSG msg = {};
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if (PeekMessage(&msg, nullptr, 0, UINT_MAX, 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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return msg.message != WM_QUIT;
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}
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void Window::deInit()
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{
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}
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LRESULT WindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
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{
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switch (msg)
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{
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case WM_CLOSE:
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DestroyWindow(hWnd);
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return 0;
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case WM_DESTROY:
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PostQuitMessage(0);
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return 0;
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case WM_KEYDOWN:
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if (wParam == VK_ESCAPE) DestroyWindow(hWnd);
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return 0;
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default:
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break;
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}
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return DefWindowProc(hWnd, msg, wParam, lParam);
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}
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