Paint 图形绘制 折线 点 弧线绘制 画笔 画刷14.4.20

// Zuoye1.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "resource.h"
#include "iostream"
HINSTANCE g_hInst = NULL;
int g_x1pos,g_y1pos,g_x2pos,g_y2pos;
int g_nDreawType=0;
//保存画笔颜色
COLORREF g_nPenColor=RGB(0,0,0);
//保存画笔的样式
int g_nPenStyle=0;
//保存画笔的宽度
int g_nPenWidth=0;
//保存画刷的颜色
COLORREF g_BrushColor=RGB(0,0,0);
//保存画刷的样式
int g_BrushStyle=-1;

void DrawPixel(HDC hDC){
	COLORREF nColor=RGB(255,0,0);
	SetPixel(hDC,100,100,nColor);
}
//获取一个点的颜色
void GetPixelColor(HDC hDC){

	COLORREF nColor=GetPixel(hDC,100,100);
	int nRed=GetRValue(nColor);
	int nGreen=GetRValue(nColor);
	int nBlue=GetRValue(nColor);
	char szText[260]={0};
	sprintf(szText,"color=%08X,RED=%d,GREEN=%d,BLUE=%d",nColor,
		nRed,nGreen,nBlue);
	MessageBox(NULL,szText,"Color",MB_OK);
}
//绘制一条直线
void DrawLine(HDC hDC){
	//开始从0 0 
	MoveToEx(hDC,0,0,NULL);
	//结束是到500 500
	LineTo(hDC,500,500);
	MoveToEx(hDC,300,300,NULL);
	LineTo(hDC,0,0);
}
//绘制一条弧线
void DrawArc(HDC hDC){
	MoveToEx(hDC,200,200,NULL);
	AngleArc(hDC,200,200,100,60,240);
	LineTo(hDC,200,200);

	Arc(hDC,400,400,500,500,500,400,400,400);
	
}
//绘制一条折线
void PolyLine(HDC hDC){
	POINT ptPolyLine[7]={0};
	ptPolyLine[0].x =100;
	ptPolyLine[0].y =100;
	ptPolyLine[1].x =200;
	ptPolyLine[1].y	=200;
	ptPolyLine[2].x =100;
	ptPolyLine[2].y	=200;
	ptPolyLine[3].x =100;
	ptPolyLine[3].y	=200;
	ptPolyLine[4].x =300;
	ptPolyLine[4].y	=300;
	ptPolyLine[4].x =400;
	ptPolyLine[4].y	=300;
     ptPolyLine[4].x =400;
	ptPolyLine[4].y	=400;

	//Polyline(hDC,ptPolyLine,7); 和一下一函数一致只不过在绘制折线前从屏幕当前的使用LineTo连接绘制直线到折线的第一个顶点
        //PolyPolyline绘制多条直线
	PolylineTo(hDC,ptPolyLine,3);
}
//矩形绘制
void DrawRect(HDC hDC){
	Rectangle(hDC,100,100,200,200);
	//吧后面的角度给修改大一点和CSS3的圆角效果一样，在大一点可以成一个圆形
	//我把他设置成了160，160
	RoundRect(hDC,300,100,400,200,160,160);
}
//绘制一个椭圆
void DrawEllipse(HDC hDC){
	Ellipse(hDC,100,100,200,200);
	Ellipse(hDC,300,100,500,200);
}
//绘制一个扇形
void DrawPie(HDC hDC){
	Pie(hDC,100,100,500,400,500,100,100,200);
}
//绘制一个平行四边形
void DrawGon(HDC hDC){
	POINT ptGon[4]={0};
	ptGon[0].x=100;
	ptGon[0].y=100;
	ptGon[1].x=200;
	ptGon[1].y=100;
	ptGon[3].x=600;
	ptGon[3].y=300;
	ptGon[2].x=500;
	ptGon[2].y=300;
	Polygon(hDC,ptGon,4);
}
//曲线绘制 类似于PS钢笔工具
void DrawBizer(HDC hDC){
	POINT ptPolyBezier[4]={0};
	ptPolyBezier[0].x =100;
	ptPolyBezier[0].y =100;
	ptPolyBezier[1].x =150;
	ptPolyBezier[1].y =50;
	ptPolyBezier[2].x =300;
	ptPolyBezier[2].y =150;
	ptPolyBezier[3].x =300;
	ptPolyBezier[3].y =100;

	PolyBezier(hDC,ptPolyBezier,4);
	MoveToEx(hDC,ptPolyBezier[0].x,ptPolyBezier[0].y,NULL);
	LineTo(hDC,ptPolyBezier[1].x,ptPolyBezier[1].y);
}
void onPaint(HWND hWnd,UINT nMsg,WPARAM wParam,LPARAM lParam){
	PAINTSTRUCT ps={0};
	HDC hDC=BeginPaint(hWnd,&ps);
	//CreatePen 第一个画笔样式 默认PS_SOLID 实心线
	//第二 线宽度 默认1个像素 第三 颜色
	HPEN hPen=CreatePen(g_nPenStyle,g_nPenWidth,g_nPenColor);
	//吧画笔加载到HDC里面  返回以前用的画笔句柄 得保存好
	HPEN hOldPen=(HPEN)SelectObject(hDC,hPen);
	HBRUSH hBrush=NULL;
	if( g_BrushStyle<0)
	{
	//创建一个画刷句柄
	hBrush=CreateSolidBrush(g_BrushColor);
	}else{
	//这个要比上面有很多的选择
	hBrush=CreateHatchBrush(g_BrushStyle,g_BrushColor);	
	}
	//设置画刷当前DC和上面画笔一样
	HBRUSH hOldBrush=(HBRUSH) SelectObject(hDC,hBrush);
	switch(g_nDreawType){
	//case ID_SETPIXEL:
	//	DrawPixel(hDC);
	//	break;
	case ID_GETPIXEL:
		GetPixelColor(hDC);
		break;
	case ID_LINE:
		DrawLine(hDC);
		break;
	case ID_ARC:
		DrawArc(hDC);
		break;
	case ID_POLYLINE:
		PolyLine(hDC);
		break;
	case ID_Bizer:
		DrawBizer(hDC);
		break;
	case ID_RECT:
		DrawRect(hDC);
		break;
	case ID_ELLIPSE:
		DrawEllipse(hDC);
		break;
	case ID_PIE:
		DrawPie(hDC);
		break;
	case ID_POLYGON:
		DrawGon(hDC);
		break;

	}
	//吧以前的画笔放进去  
	SelectObject(hDC,hOldPen);
	// 并销毁画笔
	DeleteObject(hPen);
	//吧以前的画刷放进去  
	SelectObject(hDC,hOldBrush);
	// 并销毁画刷
	DeleteObject(hBrush);
	
	EndPaint(hWnd,&ps);
}

void onCreate(HWND hWnd,UINT nMsg,WPARAM wParam,LPARAM lParam){
			HMENU hMenu=LoadMenu(g_hInst,MAKEINTRESOURCE(IDR_MENU1));
			SetMenu(hWnd,hMenu);

}

void onCommand(HWND hWnd,UINT nMsg,WPARAM wParam,LPARAM lParam){
			
	int nCmdID=LOWORD(wParam);
	switch(nCmdID){
	case ID_GETPIXEL:
	case ID_LINE:
	case ID_ARC:
	case ID_POLYLINE:
	case ID_Bizer:
	case ID_RECT:
	case ID_ELLIPSE:
	case ID_PIE:
	case ID_POLYGON:
		g_nDreawType=nCmdID;
		InvalidateRect(hWnd,NULL,true);
		break;
	case ID_EXIT:
		PostQuitMessage(0);
		break;
	case ID_PENRED:
		g_nPenColor= RGB(255,0,0);
		InvalidateRect(hWnd,NULL,true);
		break;
	case ID_PS_SOLID:
		g_nPenStyle= 0;
		InvalidateRect(hWnd,NULL,true);
		break;
	case ID_PS_DASH:
		g_nPenStyle= 1;
		InvalidateRect(hWnd,NULL,true);
		break;
	case ID_PS_DOT:
		g_nPenStyle= 2;
		InvalidateRect(hWnd,NULL,true);
		break;
	case ID_PS_DASHDOT:
		g_nPenStyle= 3;
		InvalidateRect(hWnd,NULL,true);
		break;
	//画刷设置颜色
	case ID_REDBRUSH:
		g_BrushColor=RGB(255,0,0);
		InvalidateRect(hWnd,NULL,true);
		break;
	case ID_BRUSH2e8b57:
		g_BrushColor=RGB(46,139,87);
		InvalidateRect(hWnd,NULL,true);
		break;
	case ID_PEN3:
		g_nPenWidth=3;
		InvalidateRect(hWnd,NULL,true);
		break;
	case ID_HS_CROSS:
		g_BrushStyle=1;
		InvalidateRect(hWnd,NULL,true);
		break; 
    case ID_HS_DIAGCROSS:
		g_BrushStyle=2;
		InvalidateRect(hWnd,NULL,true);
		break; 
	}

}
//主窗口的窗口处理函数
LRESULT CALLBACK WndProc( HWND hWnd,
						   UINT nMsg,
						   WPARAM wParam,
						   LPARAM lParam )
{
	switch( nMsg )
	{
	case WM_DESTROY:
		PostQuitMessage( 0 );
		KillTimer(hWnd,1002);
	break;
	case WM_COMMAND:
		onCommand(hWnd, nMsg, wParam, lParam);
		break;
	case WM_CREATE:
	onCreate(hWnd, nMsg, wParam, lParam);
	break;
	case WM_PAINT:
		onPaint(hWnd, nMsg, wParam, lParam);
		break;
	//传递到子窗体处理消息响应
	//return DefFrameProc( hWnd,g_hMDIClient, nMsg, wParam, lParam );
	//传递给系统
	}
		return DefWindowProc( hWnd, nMsg, wParam, lParam );
}
//窗口注册函数
BOOL RegisterWnd( LPSTR   pszClassName,int     nBrush )
{
	WNDCLASSEX wce = { 0 };
	wce.cbSize     = sizeof( wce );
	wce.style      = CS_HREDRAW|CS_VREDRAW;
	wce.cbClsExtra = 0;
	wce.cbWndExtra = 0;
	wce.lpfnWndProc= WndProc;
	wce.hInstance  = g_hInst;
	wce.hCursor    = NULL;
	wce.hIcon      = NULL;
	wce.hbrBackground = HBRUSH(nBrush);
	wce.lpszClassName = pszClassName;
	wce.lpszMenuName  = NULL;
	wce.hIconSm       = NULL;

	ATOM nAtom = RegisterClassEx( &wce );
	if( nAtom == 0 )
	{
		return FALSE;
	}
	return TRUE;
}
//创建主窗口
HWND CreateWnd( LPSTR pszClassName )
{
	HWND hWnd = CreateWindowEx( 0,
		pszClassName, "MainWnd", 
		WS_OVERLAPPEDWINDOW, CW_USEDEFAULT,
		CW_USEDEFAULT, CW_USEDEFAULT,
		CW_USEDEFAULT, NULL, NULL, g_hInst,
		NULL );
	return hWnd;
}
//消息循环
void Message()
{
	MSG msg = { 0 };
	while( GetMessage( &msg, NULL, 0, 0 ) )
	{
		DispatchMessage( &msg );
	}
}
//显示窗口
void DisplayWnd( HWND hWnd )
{
	ShowWindow( hWnd, SW_SHOW );
	UpdateWindow( hWnd );
}
int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
 	// TODO: Place code here.
	RegisterWnd("luoqiang",COLOR_BACKGROUND);
	DisplayWnd(CreateWnd("luoqiang"));
	Message();
	return 0;
}