更新时间:2016-01-23 16:18:57浏览次数:1+次
HRGN CreatePolyPolygonRgn(
CONST POINT *lppt, // 顶点数组
CONST INT *lpPolyCounts, // 多个多边形的顶点个数数组
int nCount, // 多边形的个数
int fnPolyFillMode // 填充模式);
这个函数的参数是比较绕的,所以在此多说几句。static int pc[]={4,4};
那么pc[0]的值即4,表示第一个多边形有四个顶点。pc[1]表示第二个多边形有4个顶点。依次类推。那么第一个参数的数组中应该是8个坐标值,即16个整数。下面是用两个矩形实现的多个多边形区域的效果图,采用的是ALTERNATE填充方式。
#include "windows.h"
#include <tchar.h>
TCHAR txt[100]=_T("C++技术网http://www.cjjjs.com");
// - 项目是Unicode字符集
LRESULT CALLBACK WinProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
static POINT pt[]={10,20,80,20,80,55,10,55,50,10,110,10,110,40,50,40,50,10};
static int pc[]={4,4};
switch (message)
{
case WM_PAINT:
{
hdc = BeginPaint(hwnd,&ps);
HRGN hEllipRgn = CreatePolyPolygonRgn(pt,pc,2,ALTERNATE);
FillRgn(hdc,hEllipRgn,(HBRUSH)GetStockObject(LTGRAY_BRUSH));
EndPaint(hwnd,&ps);
DeleteObject(hEllipRgn);
}
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
default:
break;//跳出到默认处理
}
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_ARROW);
wndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wndClass.hInstance = hInstance;
wndClass.lpfnWndProc = WinProc;
wndClass.lpszClassName = ClassName;
wndClass.lpszMenuName=NULL;
wndClass.style=CS_HREDRAW|CS_VREDRAW|CS_DBLCLKS;
if(!RegisterClass(&wndClass))return 0;
HWND hwnd = CreateWindow(ClassName,title1,WS_OVERLAPPEDWINDOW,10,100,550,400,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