更新时间:2015-12-27 17:28:32浏览次数:1+次
我们要来看看矩形绘制模型。下面是矩形绘制模型图:
下面是程序的效果图:
#include "windows.h"
#include "Windowsx.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;
TCHAR Info[100]=_T("C++技术网http://www.cjjjs.com");
RECT rect;
switch (message)
{
case WM_PAINT:
hdc = BeginPaint(hwnd,&ps);
GetClientRect(hwnd,&rect);
SelectObject(hdc,GetStockObject(BLACK_PEN));
//绘制矩形格子
for (int i=0;i<rect.right;i++)
{
MoveToEx(hdc,i*50,0,NULL);
LineTo(hdc,i*50,rect.bottom);
}
for (int i=0;i<rect.bottom;i++)
{
MoveToEx(hdc,0,i*50,NULL);
LineTo(hdc,rect.right,i*50);
}
EndPaint(hwnd,&ps);
return 0;
case WM_LBUTTONDOWN:
{
hdc=GetDC(hwnd);
//获取光标客户区坐标
POINT pt;
pt.x = GET_X_LPARAM(lParam);
pt.y = GET_Y_LPARAM(lParam);
//计算出当前光标所在矩形
RECT rect;
rect.left=(pt.x/50)*50+1;
rect.top=(pt.y/50)*50+1;
rect.right=rect.left+50-1;
rect.bottom=rect.top+50-1;
//填充矩形
FillRect(hdc,&rect,CreateSolidBrush(RGB(255,0,0)));
DeleteObject(SelectObject(hdc,GetStockObject(WHITE_BRUSH)));
ReleaseDC(hwnd,hdc);
}
return 0;
case WM_RBUTTONDOWN:
{
hdc=GetDC(hwnd);
//获取光标客户区坐标
POINT pt;
pt.x = GET_X_LPARAM(lParam);
pt.y = GET_Y_LPARAM(lParam);
//计算出当前光标所在矩形
RECT rect;
rect.left=(pt.x/50)*50+1;
rect.top=(pt.y/50)*50+1;
rect.right=rect.left+50-1;
rect.bottom=rect.top+50-1;
//填充矩形
//FrameRect(hdc,&rect,(HBRUSH)GetStockObject(BLACK_BRUSH));//画边框
//画矩形还原
//SelectObject(hdc,GetStockObject(WHITE_PEN));
//Rectangle(hdc,rect.left,rect.top,rect.right,rect.bottom);
//直接填充还原,推荐直接使用填充还原,因为本来就是使用填充方式着色
FillRect(hdc,&rect,(HBRUSH)GetStockObject(WHITE_BRUSH));
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_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;
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;
}
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