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分享在视图中打印图形时为什么实线会像虚线
我用MM_TEXT模式在视图中绘制的图形在显示设备上显示时是直线，但是当我打印时却发现打印和显示的效果不一样，打印出的图形有点像虚线，由许多小点组成，但是又和虚线不同，比虚线要密。不知道是不是和绘图模式有关，请大家帮帮忙，我也不知道怎么办了，很急，最好能够不改变绘图模式就解决这个问题
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gb102 2005-04-02
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有没有不改变映射模式就可以解决这个问题的方法啊，我现在的程序比较大而且耦合性太强，如果要改变映射模式就要改许多地方
菜牛 2005-03-24
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是不是颜色的问题，搞成半色调了。
bobob 2005-03-23
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重载OnPrepareDC
void CPrintView::OnPrepareDC(CDC＊ pDC, CPrintInfo＊ pInfo)
{
CView::OnPrepareDC(pDC, pInfo);
pDC－>SetMapMode(MM_ANISOTROPIC);
CSize size = CSize(800, 560);
pDC－>SetWindowExt(size);
int xLogPixPerInch = pDC－>GetDeviceCaps(LOGPIXELSX);
int yLogPixPerInch = pDC－>GetDeviceCaps(LOGPIXELSY);
long xExt = (long)size.cx ＊ xLogPixPerInch/96 ;
long yExt = (long)size.cy ＊ yLogPixPerInch/96 ;
pDC－>SetViewportExt((int)xExt, (int)yExt);
}
void CPrintView::OnPrepareDC(CDC＊ pDC, CPrintInfo＊ pInfo)
{
CView::OnPrepareDC(pDC, pInfo);
pDC－>SetMapMode(MM_ANISOTROPIC);
CSize size = CSize(800, 560);
pDC－>SetWindowExt(size);
int xLogPixPerInch = pDC－>GetDeviceCaps(LOGPIXELSX);
int yLogPixPerInch = pDC－>GetDeviceCaps(LOGPIXELSY);
long xExt = (long)size.cx ＊ xLogPixPerInch/96 ;
long yExt = (long)size.cy ＊ yLogPixPerInch/96 ;
pDC－>SetViewportExt((int)xExt, (int)yExt);
}
老夏Max 2005-03-23
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最好不要使用MM_TWIPS模式，这种模式一般是用在排版上的，很少有人使用，并且转换起来比较麻烦！
老夏Max 2005-03-23
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如果是固定的大小的可以使用下面的映射方式：（引自MSDN）
MM_HIENGLISH Each logical unit is converted to 0.001 inch. Positive x is to the right; positive y is up.
MM_HIMETRIC Each logical unit is converted to 0.01 millimeter. Positive x is to the right; positive y is up.
MM_ISOTROPIC Logical units are converted to arbitrary units with equally scaled axes; that is, 1 unit along the x-axis is equal to 1 unit along the y-axis. Use the SetWindowExt and SetViewportExt member functions to specify the desired units and the orientation of the axes. GDI makes adjustments as necessary to ensure that the x and y units remain the same size.
MM_LOENGLISH Each logical unit is converted to 0.01 inch. Positive x is to the right; positive y is up.
MM_LOMETRIC Each logical unit is converted to 0.1 millimeter. Positive x is to the right; positive y is up.
MM_HIENGLISH Each logical unit is converted to 0.001 inch. Positive x is to the right; positive y is up.
MM_HIMETRIC Each logical unit is converted to 0.01 millimeter. Positive x is to the right; positive y is up.
MM_ISOTROPIC Logical units are converted to arbitrary units with equally scaled axes; that is, 1 unit along the x-axis is equal to 1 unit along the y-axis. Use the SetWindowExt and SetViewportExt member functions to specify the desired units and the orientation of the axes. GDI makes adjustments as necessary to ensure that the x and y units remain the same size.
MM_LOENGLISH Each logical unit is converted to 0.01 inch. Positive x is to the right; positive y is up.
MM_LOMETRIC Each logical unit is converted to 0.1 millimeter. Positive x is to the right; positive y is up.
老夏Max 2005-03-23
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也许是和映射模式有关吧。
MM_TEXT是1对1的映射，线也是由点组成的！
MM_TEXT是1对1的映射，线也是由点组成的！
galois_godel 2005-03-23
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换MM_TWIPS试试
xuzheng318 2005-03-23
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帮楼主顶！关注！
j805 2005-03-23
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我也碰到这个问题了，仔细看是很细的锯齿线。
关注。
关注。
