c windows 自绘
时间: 2023-10-03 20:06:38 浏览: 35
要在C++中进行自绘,需要使用Windows API函数来绘制窗口。下面是一个简单的示例:
```cpp
#include <Windows.h>
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
// 注册窗口类
WNDCLASSEX wc;
ZeroMemory(&wc, sizeof(wc));
wc.cbSize = sizeof(wc);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WndProc;
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.lpszClassName = L"MyWindowClass";
RegisterClassEx(&wc);
// 创建窗口
HWND hwnd = CreateWindowEx(0, L"MyWindowClass", L"自绘窗口", WS_OVERLAPPEDWINDOW, 100, 100, 800, 600, NULL, NULL, hInstance, NULL);
// 显示窗口
ShowWindow(hwnd, nCmdShow);
// 消息循环
MSG msg;
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int)msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch (msg)
{
case WM_PAINT:
{
// 创建绘图设备
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hwnd, &ps);
// 绘制矩形
RECT rect;
GetClientRect(hwnd, &rect);
FillRect(hdc, &rect, (HBRUSH)(COLOR_WINDOW+1));
// 绘制文本
SetTextColor(hdc, RGB(255, 0, 0));
SetBkMode(hdc, TRANSPARENT);
DrawText(hdc, L"Hello, World!", -1, &rect, DT_CENTER | DT_VCENTER | DT_SINGLELINE);
// 释放绘图设备
EndPaint(hwnd, &ps);
}
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, msg, wParam, lParam);
}
```
这个示例代码创建了一个窗口,并在其中绘制了一个红色的"Hello, World!"文本。绘图过程在WM_PAINT消息处理函数中完成。可以使用其他Windows API函数来绘制各种形状、图像等内容。