windows 波形显示控件代码
时间: 2023-12-21 11:04:42 浏览: 27
以下是一个简单的Windows波形显示控件示例代码:
```c++
#include <windows.h>
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
// 创建窗口类
WNDCLASS wc = {0};
wc.lpfnWndProc = WndProc;
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszClassName = "WaveformClass";
RegisterClass(&wc);
// 创建窗口
HWND hwnd = CreateWindow("WaveformClass", "Waveform Display", WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 640, 480, NULL, NULL, hInstance, NULL);
ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);
// 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: {
// 绘制波形
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hwnd, &ps);
MoveToEx(hdc, 0, 240, NULL);
for (int i = 0; i < 640; ++i) {
int y = (int)(240 + 200 * sin(2 * 3.1415926 * i / 640));
LineTo(hdc, i, y);
}
EndPaint(hwnd, &ps);
return 0;
}
case WM_DESTROY:
PostQuitMessage(0);
return 0;
default:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
}
```
该示例代码创建了一个基本的Windows窗口,并在窗口客户区域绘制了一个简单的正弦波形。你可以根据需要修改波形的形状和颜色,以及控件的大小和位置。