急：如何分别用实线虚线和点划线画图，打印时能根据需要调整图形的大小。在线等！

Question

如何分别用实线虚线和点划线画图，打印时能根据需要调整图形的大小，请给出实例

Answer 1

先说操作系统Win98还是WinNT以上？

Answer 2

如何按照线型画粗线 
WINNT下，可以用以下方式创建画笔       LOGBRUSH brush;       brush.lbColor=DrawColor;       brush.lbStyle=BS_SOLID;mPen.CreatePen(PS_GEOMETRIC|PS_USERSTYLE|PS_ENDCAP_FLAT,(int)LineWide,&brush,i,PenStyle); Win98中，给DC设置合适的笔宽，选择实线，下面函数可以根据PenStyle数组给定长度值画直线。如果画曲线或者折线，需要把曲线离散成直线段，根据上次画线返回值确定本次画线的起始值，就可以了#include "math.h"DWORD   PenStyle[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};typedef struct xyz {       double x;       double y;       double z;} XYZ,*PXYZ,**PPXYZ; //按照PenStyle[]画一条从p1点到p2点的直线//例如PenStyle[0]=5，PenStyle[1]=2表示按照长度为5的实线、长度为2的间隔形成的线型画线//_____  _____  _____  _//并且指定从线型的何处画，例如iStart=6从Penstyle[1]处的第二个空格开始画//iStart取值范围为0到一个线型的总长度-1//返回值：线型总长度与剩余最后一段线长度之差，表示下一次画线应该指定的从何处开始画int DrawLineA(CDC* pDC,POINT p1,POINT p2,int iStart){       int i=0;       int iEnd=0;//返回值，表示最后一段不完全的线段的长度       //计算直线长度       double dDistance=sqrt((p2.x-p1.x)*(p2.x-p1.x)+(p2.y-p1.y)*(p2.y-p1.y));       int iLineType=0;//线型的长度       if(dDistance<2)       {              for(i=0;i<16;i++)              {                     if(PenStyle[i]==0)break;                     iLineType+=PenStyle[i];              }              iEnd=(int(iStart-dDistance))%iLineType;              if(iEnd<0)iEnd+=iLineType;              return iEnd;       }       double ddltx[16]={0,0,0,0,//每一段线型的x距离              0,0,0,0,              0,0,0,0,              0,0,0,0};       double ddlty[16]={0,0,0,0,//每一段线型的y距离              0,0,0,0,              0,0,0,0,              0,0,0,0};       double dXScale=(p2.x-p1.x)/dDistance;//x方向长度和总长度比例       double dYScale=(p2.y-p1.y)/dDistance;//y方向长度和总长度比例       //计算每一段线型的x、y距离及线型的长度       for(i=0;i<16;i++)       {              if(PenStyle[i]==0)break;              ddltx[i]=PenStyle[i]*dXScale;              ddlty[i]=PenStyle[i]*dYScale;              iLineType+=PenStyle[i];       }       iEnd=(int(dDistance+iStart))%iLineType;       if(iEnd<0)iEnd+=iLineType;              XYZ pp={0,0,0};//第一段之前的完整线型开始点       pDC->MoveTo(p1);       int iLength=-iStart;//已经画的线段的长度       pp.x=iLength*dXScale+p1.x;       pp.y=iLength*dYScale+p1.y;       for(;;)       {              for(i=0;i<16;i++)              {                     if(PenStyle[i]==0)break;                     pp.x+=ddltx[i];                     pp.y+=ddlty[i];                     iLength+=PenStyle[i];                     if(i%2==0)                     {                            if(iLength>0)                            {                                   if(iLength<dDistance)                                   {                                          pDC->LineTo(pp.x,pp.y);                                   }                                   else                                   {                                          pDC->LineTo(p2);                                          return iEnd;                                   }                            }                     }else                     {                            if(iLength>0)                            {                                   if(iLength<dDistance)                                   {                                          pDC->MoveTo(pp.x,pp.y);                                   }                                   else                                   {                                          pDC->MoveTo(p2);                                          return iEnd;                                   }                            }                     }              }       }       return iEnd;}

Answer 3

先CreatePen创建一个画笔
然后SelectObject选择画笔

Answer 4

你最好做一个坐标变换，或者也可以用ScaleViewportExt吧

Answer 5

PenStyle[16] = {5,2,5,2,5,2,5,2,5,2,5,2,5,2,5,2};
表示按照长度为5的实线、长度为2的间隔形成的线型
PenStyle[16] = {5,3,4,5,3,4,5,3,4,5,3,4,5,3,4,5};
表示按照长度5的实线，长为3的间隔，再长度4的实线---最后间隔为五的线型来画线，是吧。
应把这程序加在哪里？
在打印时有什么要特别注意的，请给出程序

Answer 6

不不不PenStyle[16] = {5,2,0}这样用,后面用零结尾
要有偶数个才好
如何按照线型画粗线 
WINNT下，可以用以下方式创建画笔,WINNT下的那个PenStyle基本也是这个意思       LOGBRUSH brush;       brush.lbColor=DrawColor;       brush.lbStyle=BS_SOLID;mPen.CreatePen(PS_GEOMETRIC|PS_USERSTYLE|PS_ENDCAP_FLAT,(int)LineWide,&brush,i,PenStyle);

Answer 7

LOGBRUSH brush;        brush.lbColor=RGB(5, 5, 5);        brush.lbStyle=BS_DASH;        CPen mPen=CreatePen(PS_GEOMETRIC|PS_USERSTYLE|PS_ENDCAP_FLAT,8,&brush,i,BS_DASH); //CPen pen2(PS_SOLID, 1, RGB(5, 5, 5));/////开环响应曲线的颜色
    pOldPen=pDC->SelectObject(&mPen);
虚线类型是BS_DASH 吗？