c++ 根据把图片设为窗口
时间: 2023-08-05 08:04:18 浏览: 47
要将图片设置为窗口背景,需要经过以下步骤:
1. 使用Windows API创建窗口。
2. 加载图片,可以使用GDI+库或者其他图片处理库。
3. 将图片绘制到窗口的背景上,可以使用Windows API的WM_PAINT消息,或者其他绘图函数。
下面是一个简单的示例代码,可以将名为"image.bmp"的图片设置为窗口背景:
```
#include <Windows.h>
#include <gdiplus.h>
#pragma comment(lib, "gdiplus.lib")
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd, &ps);
// 加载图片
Gdiplus::Bitmap* bmp = Gdiplus::Bitmap::FromFile(L"image.bmp");
if (bmp != NULL)
{
// 绘制图片
Gdiplus::Graphics graphics(hdc);
graphics.DrawImage(bmp, 0, 0);
delete bmp;
}
EndPaint(hWnd, &ps);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
// 注册窗口类
WNDCLASS wc = { 0 };
wc.lpfnWndProc = WndProc;
wc.hInstance = hInstance;
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
wc.lpszClassName = L"MyWindowClass";
RegisterClass(&wc);
// 创建窗口
HWND hWnd = CreateWindow(L"MyWindowClass", L"Window Title", WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 800, 600, NULL, NULL, hInstance, NULL);
if (hWnd == NULL)
return 0;
// 显示窗口
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
// 消息循环
MSG msg = { 0 };
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int)msg.wParam;
}
```