更新时间:2016-01-26 23:48:05浏览次数:1+次
我们先看看我们要实现的效果图:
【红色在“+技术网”四个字符上】
SelectObject(hdc,hRgn);
这样就将区域选为了剪切区域。我们是完全覆盖的输出字符串,区域移动后,也就只有当前的剪切区域部分能够输出红色的字符串,也就表现出了红色覆盖在当前蓝色字符串上。#include "windows.h"
#include <tchar.h>
TCHAR txt[]=_T("C++技术网http://www.cjjjs.com,提供免费配套的C语言、C++语言、Win32编程、Linux编程、经典书籍下载、零基础编程课程、项目开发经验、学习经验、工作经验、数据结构、算法思维、程序员学习发展等一站式的服务。");
HRGN hRgn;
// - 项目是Unicode字符集
LRESULT CALLBACK WinProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
static int i=0;
static LOGFONT logFont;
static HFONT hFont;
static RECT rectClient;
switch (message)
{
case WM_TIMER:
InvalidateRect(hwnd,NULL,FALSE);
return 0;
case WM_CREATE:
SetTimer(hwnd,1,100,NULL);
hRgn = CreateRectRgn(50,50,200,100);
memset(&logFont,0,sizeof(logFont));
logFont.lfHeight=50;
logFont.lfWeight=200;
hFont = CreateFontIndirect(&logFont);
GetClientRect(hwnd,&rectClient);
return 0;
case WM_PAINT:
{
hdc = BeginPaint(hwnd,&ps);
//形成新的区域
OffsetRgn(hRgn,10,0);//移动区域
//输出底层的蓝色字符串
SelectObject(hdc,hFont);
SetTextColor(hdc,RGB(0,0,255));
TextOut(hdc,50,50,txt,lstrlen(txt));
//设置剪切区域
SelectObject(hdc,hRgn);//剪切区开始生效
//在相同的位置输出红色字覆盖蓝色的字
SetTextColor(hdc,RGB(255,0,0));
TextOut(hdc,50,50,txt,lstrlen(txt));
EndPaint(hwnd,&ps);
}
return 0;
case WM_DESTROY:
DeleteObject(hRgn);//删除区域
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,10,100,800,400,NULL,NULL,hInstance,NULL);
ShowWindow(hwnd,SW_SHOWNORMAL);
MSG msg;
while (GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
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