更新时间:2015-12-28 11:48:18浏览次数:1+次
先来看看效果图:
RECT rect;
SetRect(&rect,50,50,150,150);//设置矩形的位置,左顶右底四个坐标点
InvertRect(hdc,&rect);//反色矩形
做到这里,这个反色就实现了。为了增强体验,我们就在WM_PAINT中绘制一个浅灰色的矩形。代码如下:SelectObject(hdc,GetStockObject(LTGRAY_BRUSH));
Rectangle(hdc,10,10,110,110);
这样,就实现了图中的效果。注意一点,InvertRect始终会对指定的范围反色,也就是以这个范围每一个像素之前的颜色进行反色,所以可以达到发色切换的效果,而无需额外的判断。可谓是真的很简单快速就实现了这个效果哦。#include "windows.h"
#include <tchar.h>
// - 项目是Unicode字符集
LRESULT CALLBACK WinProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
switch (message)
{
case WM_PAINT:
hdc = BeginPaint(hwnd,&ps);
//画一个浅灰色的矩形
SelectObject(hdc,GetStockObject(LTGRAY_BRUSH));
Rectangle(hdc,10,10,110,110);
EndPaint(hwnd,&ps);
return 0;
case WM_LBUTTONDOWN:
{
hdc=GetDC(hwnd);
RECT rect;
SetRect(&rect,50,50,150,150);//设置矩形的大小
InvertRect(hdc,&rect);//反色矩形
ReleaseDC(hwnd,hdc);
}
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
}
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrev,LPSTR lpCmd,int iShow)
{
TCHAR ClassName[] = _T("MyClass");
TCHAR title1[] = _T("C++技术网http://www.cjjjs.com");
WNDCLASS wndClass;
wndClass.cbClsExtra=0;
wndClass.cbWndExtra=0;
wndClass.hbrBackground= (HBRUSH)GetStockObject(WHITE_BRUSH);
wndClass.hCursor=LoadCursor(NULL,IDC_HAND);
wndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wndClass.hInstance = hInstance;
wndClass.lpfnWndProc = WinProc;
wndClass.lpszClassName = ClassName;
wndClass.lpszMenuName=NULL;
wndClass.style=CS_HREDRAW|CS_VREDRAW;
if(!RegisterClass(&wndClass))return 0;
HWND hwnd = CreateWindow(ClassName,title1,WS_OVERLAPPEDWINDOW,0,0,440,400,NULL,NULL,hInstance,NULL);
ShowWindow(hwnd,SW_SHOWNORMAL);
MSG msg;
while (GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
相关资讯