91 lines
2.3 KiB
C++
91 lines
2.3 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"); // class name for identify
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wc.lpfnWndProc = WindowProc; // function for windows to send messages to our application
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wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; // technical window properties, here update window if window change horizontally or vertically and window should have its own device context
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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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// 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; // borderless window
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// 4. create window instance
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_hWnd = CreateWindow(
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wc.lpszClassName, // class name for window instance
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wc.lpszClassName, // window title
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style, // visual window style
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100, 100, // window position (left-top corner)
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width, height, // 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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// message queue
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// https://learn.microsoft.com/en-us/windows/win32/winmsg/about-messages-and-message-queues
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// GetMessage - wait for a message send by windows (syncronous)
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// PeekMessage - get last message from queue or nothing
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// TranslateMessage - translates keyboard input (scan (hardware) vs. virtual key code)
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// DispatchMessage - send message to window proc
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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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Sleep(10);
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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)
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{
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DestroyWindow(hWnd);
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return 0;
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}
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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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