1 F h PCreate Pen int n Pen

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1. 画笔（续） F 也可创建新画笔， 形式如下： h. P=Create. Pen （ int n. Pen. Style, int

1. 画笔（续） F 也可创建新画笔， 形式如下： h. P=Create. Pen （ int n. Pen. Style, int n. Width, COLORREF rgb. Color ）; PS_DASH： 虚线 PS_DASHDOT： 点划线 PS_DASHDOTDOT：双点划线 PS_DOT： 点线 PS_INSIDEFRAME：实线 PS_NULL： 无 PS_SOLID： 实线 //确定画笔样式 //画笔宽度 //画笔颜色 23

2. 画刷（续） F 可调用创建画刷函数： – Create. Solid. Brush – Create. Hatch. Brush h. Br=Create.

2. 画刷（续） F 可调用创建画刷函数： – Create. Solid. Brush – Create. Hatch. Brush h. Br=Create. Solid. Brush(rgb. Color); h. Br=Create. Hatch. Brush (int n. Hctch. Style, COLORREF rgb. Color ); 创建具有 指定颜色 的单色画刷 创建指定阴 影图案和颜 色的画刷 HS_BDIAGONAL 45度从左上到右下 HS_DIAGCROSS 45度叉线 HS_FDIAGONAL 45度从左下到右上 HS_CROSS 垂直相交的阴影线 HS_HORIZONTAL 水平阴影线 HS_VERTICAL 垂直阴影线 27

8. 绘制椭圆，并用当前画刷填充 BOOL Ellipse(HDC hdc, int. X 1, int. Y 1, int. X 2,

8. 绘制椭圆，并用当前画刷填充 BOOL Ellipse(HDC hdc, int. X 1, int. Y 1, int. X 2, int. Y 2) 9．绘制多边形，并用当前画刷填充 BOOL Polygon(HDC hdc, LPPOINT lp. Points, int n. Count) 包含各点坐标的 POINT数组的地址 多边形点的个数 35

#include<windows. h> #include<stdlib. h> #include<string. h> long WINAPI Wnd. Proc ( HWND h. Wnd,

#include<windows. h> #include<stdlib. h> #include<string. h> long WINAPI Wnd. Proc ( HWND h. Wnd, UINT i. Message, UINT w. Param, LONG l. Param ); BOOL Init. Windows. Class(HINSTANCE h. Instance); BOOL Init. Windows(HINSTANCE h. Instance, int n. Cmd. Show); HWND h. Wnd. Main; 38

Int WINAPI Win. Main ( HINSTANCE h. Instance, HINSTANCE h. Prev. Instance, LPSTR lp.

Int WINAPI Win. Main ( HINSTANCE h. Instance, HINSTANCE h. Prev. Instance, LPSTR lp. Cmd. Line, int n. Cmd. Show) { MSG Message; if(!Init. Windows. Class(h. Instance)) if(!Init. Windows(h. Instance, n. Cmd. Show)) while(Get. Message(&Message, 0, 0, 0)) { Translate. Message(&Message); Dispatch. Message(&Message); } return Message. w. Param; } //主函数 return FALSE; //消息循环 39

消息处理函数 long WINAPI Wnd. Proc(HWND h. Wnd, UINT i. Message, UINT w. Param, LONG

消息处理函数 long WINAPI Wnd. Proc(HWND h. Wnd, UINT i. Message, UINT w. Param, LONG l. Param) { HDC h. DC; //定义指向设备的句柄 HBRUSH h. Brush; //定义指向画刷的句柄 HPEN h. Pen; //定义指向画笔的句柄 PAINTSTRUCT Pt. Str; //定义指向包含绘图信息的结构体变量 switch(i. Message) //处理消息 { case WM_PAINT: //处理绘图消息 h. DC=Begin. Paint(h. Wnd, &Pt. Str); Set. Map. Mode(h. DC, MM_ANISOTROPIC); //设置映像模式 h. Pen=(HPEN)Get. Stock. Object(BLACK_PEN); //黑色画笔 h. Brush=(HBRUSH)Get. Stock. Object(DKGRAY_BRUSH); //深灰色刷 Select. Object(h. DC, h. Brush); //选择画刷 40

Select. Object(h. DC, h. Pen); //选择画笔 Round. Rect(h. DC, 50, 120, 100, 200, 15);

Select. Object(h. DC, h. Pen); //选择画笔 Round. Rect(h. DC, 50, 120, 100, 200, 15); //绘制圆角矩形 h. Brush=(HBRUSH)Get. Stock. Object(LTGRAY_BRUSH); //亮灰色刷 Select. Object(h. DC, h. Brush); //选择画刷 Ellipse(h. DC, 150, 200, 150); //绘制椭圆 h. Brush=(HBRUSH)Get. Stock. Object(HOLLOW_BRUSH); //虚画刷 Select. Object(h. DC, h. Brush); //选择画刷 Pie(h. DC, 250, 300, 100, 250, 300, 50); //绘制饼形 End. Paint(h. Wnd, &Pt. Str); //结束绘图 return 0; case WM_DESTROY: //结束应用程序 Post. Quit. Message(0); return 0; default: //其他消息处理程序 return(Def. Window. Proc(h. Wnd, i. Message, w. Param, l. Param)) ; } } 41

BOOL Init. Windows(HINSTANCE h. Instance, int n. Cmd. Show)//初始化窗口 { HWND h. Wnd; h.

BOOL Init. Windows(HINSTANCE h. Instance, int n. Cmd. Show)//初始化窗口 { HWND h. Wnd; h. Wnd=Create. Window("Win. Fill", //生成窗口 "填充示例程序", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, NULL, h. Instance, NULL); if(!h. Wnd) return FALSE; h. Wnd. Main=h. Wnd; Show. Window(h. Wnd, n. Cmd. Show); //显示窗口 Update. Window(h. Wnd); return TRUE; } 42

BOOL Init. Windows. Class(HINSTANCE h. Instance) //定义窗口类 { WNDCLASS Wnd. Class; Wnd. Class. cb.

BOOL Init. Windows. Class(HINSTANCE h. Instance) //定义窗口类 { WNDCLASS Wnd. Class; Wnd. Class. cb. Cls. Extra=0; Wnd. Class. cb. Wnd. Extra=0; Wnd. Class. hbr. Background=(HBRUSH)(Get. Stock. Object(WHITE_BRUSH)); Wnd. Class. h. Cursor=Load. Cursor(NULL, IDC_ARROW); Wnd. Class. h. Icon=Load. Icon(NULL, "END"); Wnd. Class. h. Instance=h. Instance; Wnd. Class. lpfn. Wnd. Proc=Wnd. Proc; Wnd. Class. lpsz. Class. Name="Win. Fill"; Wnd. Class. lpsz. Menu. Name=NULL; Wnd. Class. style=CS_HREDRAW|CS_VREDRAW; return Register. Class(&Wnd. Class); } 43

在消息WM_PAINT处理程序中，调用函数Begin. Paint()获得 设备环境句柄。由此经过线性差分计算圆半径的大小 l. Radious，第 1个 1/4周期的程序代码如下： if(i<=25) //第一个 1/4周期 { h. Pen=Create. Pen(PS_DASH,

在消息WM_PAINT处理程序中，调用函数Begin. Paint()获得 设备环境句柄。由此经过线性差分计算圆半径的大小 l. Radious，第 1个 1/4周期的程序代码如下： if(i<=25) //第一个 1/4周期 { h. Pen=Create. Pen(PS_DASH, 1, RGB(255, 0, 0)); //红笔 h. Brush=Create. Hatch. Brush(HS_BDIAGONAL, RGB(255, 0, 0)); //红刷 //计算半径 l. Radious=(long)(df. Range*0. 2+i%25*df. Range*0. 4/25); } ……. 46

#include <windows. h> #include <stdlib. h> #include <string. h> #include <math. h> #define Pi

#include <windows. h> #include <stdlib. h> #include <string. h> #include <math. h> #define Pi 3. 1415926 long WINAPI Wnd. Proc(HWND h. Wnd, UINT i. Message, UINT w. Param, LONG l. Param); double df. Theta=0, df. Range=100. 0; //正弦曲线的角度变量. long i=0, j=0; long l. Centre. X=0, l. Centre. Y=0, l. Radious=(long)(0. 2*df. Range); //定义圆心坐标和圆坐标. POINT lp. Sin[100]; //定义正弦曲线的点坐标. 48

int WINAPI Win. Main(…, …, …, . . . ) { …… // 填写窗口类属性

int WINAPI Win. Main(…, …, …, . . . ) { …… // 填写窗口类属性 if(!Register. Class(&Wnd. Class)) { Message. Beep(0); return FALSE; } //注册窗口. h. Wnd=Create. Window ("SIN", "4_6", //窗口类名. //标题名. WS_OVERLAPPEDWINDOW, //带标题栏, 最大/小按钮的窗口 CW_USEDEFAULT, //窗口左上角坐标. 0, CW_USEDEFAULT, //采用缺省的宽度和高度. 0, NULL, //无父窗口. NULL, //无主菜单. h. Instance, //当前实例句柄. NULL); . 49

Show. Window(h. Wnd, n. Cmd. Show); //显示窗口. Update. Window(h. Wnd); //更新并绘制用户区. for(int j=0; j<100;

Show. Window(h. Wnd, n. Cmd. Show); //显示窗口. Update. Window(h. Wnd); //更新并绘制用户区. for(int j=0; j<100; j++) //生成正弦曲线的点坐标. { lp. Sin[j]. x=(long)(j*2*Pi/100*60); lp. Sin[j]. y=(long)(df. Range*sin(j*2*Pi/100)); } while(Get. Message(&Message, 0, 0, 0)) { Translate. Message(&Message); Dispatch. Message(&Message); } return Message. w. Param; //消息循环. } 50

long WINAPI Wnd. Proc(HWND h. Wnd, UINT i. Message, UINT w. Param, LONG l.

long WINAPI Wnd. Proc(HWND h. Wnd, UINT i. Message, UINT w. Param, LONG l. Param) { HDC h. DC; //定义设备环境句柄. HBRUSH h. Brush; //定义画刷句柄 HPEN h. Pen; //定义画笔句柄 PAINTSTRUCT Pt. Str; //定义包含绘图信息的结构体变量 witch(i. Message) { case WM_PAINT: //处理绘图消息 h. DC=Begin. Paint(h. Wnd, &Pt. Str); //获得设备环境指针 Set. Window. Org. Ex(h. DC, -200, NULL); //设置原点坐标 h. Pen=Create. Pen(PS_DASH, 1, RGB(255, 0, 0)); //建新画笔 Select. Object(h. DC, h. Pen); //选入画笔 Polyline(h. DC, lp. Sin, 100); //绘制正弦曲线 51

if(i<=25) //第一个 1/4周期. { h. Pen=Create. Pen(PS_DASH, 1, RGB(255, 0, 0)); h. Brush=Create. Hatch.

if(i<=25) //第一个 1/4周期. { h. Pen=Create. Pen(PS_DASH, 1, RGB(255, 0, 0)); h. Brush=Create. Hatch. Brush(HS_BDIAGONAL, RGB(255, 0, 0)); l. Radious=(long)(df. Range*0. 2+i%25*df. Range*0. 4/25); //计算半径 } else if(i<=50)//第二个 1/4周期. { h. Pen=Create. Pen(PS_DASH, 1, RGB(0, 255, 0)); h. Brush=Create. Hatch. Brush(HS_DIAGCROSS, RGB(0, 255, 0)); l. Radious=(long)(df. Range*0. 2+i%25*df. Range*0. 4/25); } else if(i<=75)//第三个 1/4周期. { h. Pen=Create. Pen(PS_DASH, 1, RGB(0, 0, 255)); h. Brush=Create. Hatch. Brush(HS_CROSS, RGB(0, 0, 255)); l. Radious=(long)(df. Range*0. 2+i%25*df. Range*0. 4/25); } else//第四个 1/4周期. { h. Pen=Create. Pen(PS_DASH, 1, RGB(255, 0)); h. Brush=Create. Hatch. Brush(HS_VERTICAL, RGB(255, 0)); l. Radious=(long)(df. Range*0. 2+i%25*df. Range*0. 4/25); } 52

Select. Object(h. DC, h. Brush); //选入画刷. Select. Object(h. DC, h. Pen); //选入画笔. l. Centre.

Select. Object(h. DC, h. Brush); //选入画刷. Select. Object(h. DC, h. Pen); //选入画笔. l. Centre. X=lp. Sin[i]. x; //圆心x坐标. l. Centre. Y=lp. Sin[i]. y; //圆心y坐标. Ellipse(h. DC, l. Centre. X-l. Radious, l. Centre. Y-l. Radious, l. Centre. X+l. Radious, l. Centre. Y+l. Radious); //画圆 i++; Delete. Object(h. Pen); //删除画笔 Delete. Object(h. Brush); //删除画刷 End. Paint(h. Wnd, &Pt. Str); //删除设备环境指针 Sleep(100); //停 0. 1秒 if(i<100) Invalidate. Rect(h. Wnd, NULL, 1); //刷新用户区 return 0; case WM_DESTROY: //关闭窗口. Post. Quit. Message(0); return 0; default: return(Def. Window. Proc(h. Wnd, i. Message, w. Param, l. Param)); } } 53

#include <windows. h> #include <string. h> #include <stdlib. h> #include <stdio. h> LRESULT CALLBACK

#include <windows. h> #include <string. h> #include <stdlib. h> #include <stdio. h> LRESULT CALLBACK Wnd. Proc(HWND, UINT, WPARAM, LPARAM); int WINAPI Win. Main(HINSTANCE h. Instance, HINSTANCE h. Prev. Inst, LPSTR lpsz. Cmd. Line, int n. Cmd. Show) { HWND hwnd; MSG Msg; WNDCLASS wndclass; char lpsz. Class. Name[] = "基本绘图"; char lpsz. Title[]= "My_Drawing"; wndclass. style = 0; …… //填写属性 wndclass. lpsz. Class. Name = lpsz. Class. Name ; if(!Register. Class(&wndclass)) { Message. Beep(0); return FALSE; } hwnd = Create. Window(…, ………, …); Show. Window(hwnd, n. Cmd. Show) ; Update. Window(hwnd); while( Get. Message(&Msg, NULL, 0, 0)) {Translate. Message(&Msg); Dispatch. Message(&Msg); } return Msg. w. Param; } 55

LRESULT CALLBACK Wnd. Proc(HWND hwnd, UINT message, WPARAM w. Param, LPARAM l. Param) {

LRESULT CALLBACK Wnd. Proc(HWND hwnd, UINT message, WPARAM w. Param, LPARAM l. Param) { HDC hdc; PAINTSTRUCT ps; HPEN h. P; //定义画笔句柄 HBRUSH h. B; //定义画刷句柄 switch(message) { case WM_PAINT: //通过响应WM_PAINT消息完成绘图 作 h. P=Create. Pen(PS_DASHDOT, 1, RGB(0, 255, 0)); //自定义绿笔 //所画线条为点划线，宽度为 1 h. B=Create. Hatch. Brush(HS_CROSS, RGB(255, 0, 0)); //红色网状 hdc=Begin. Paint(hwnd, &ps); //取得设备环境句柄 Set. Map. Mode(hdc, MM_TEXT); //设置映射模式，用缺省模式 //使用当前缺省画笔、画刷进行绘图 Rectangle(hdc, 130, 60, 270, 200); //绘制矩形，并填充 Select. Object(hdc, h. B); //更新画刷，用“红色网状” Ellipse(hdc, 130, 70, 270, 190); //绘制椭圆，并填充 56

Select. Object(hdc, h. P); //更新画笔，选“自定义绿笔” Move. To. Ex(hdc, 100, 130, NULL); //使用当前画笔绘制轴线 Line. To(hdc,

Select. Object(hdc, h. P); //更新画笔，选“自定义绿笔” Move. To. Ex(hdc, 100, 130, NULL); //使用当前画笔绘制轴线 Line. To(hdc, 300, 130); Move. To. Ex(hdc, 200, 30, NULL); Line. To(hdc, 200, 230); End. Paint(hwnd, &ps); //释放设备环境句柄 break; case WM_DESTROY: Delete. Object(h. P); //退出窗口时删除画笔 Delete. Object(h. B); //退出窗口时删除黑色画刷 Post. Quit. Message(0); break; default: return Def. Window. Proc(hwnd, message, w. Param, l. Param); } return 0; } 57

(第四章) 完 12/12/2021 58

(第四章) 完 12/12/2021 58

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