代码图像的图形方面. [英] Graphic aspects of a code image.

问题描述

我写了一个类似的滑动控制示例，每个滑动块的结果，出现下面的图表，从图1开始，滑动到图2的左侧后.
图I

图2

下图是主要代码块:

I wrote a similar example of sliding control, the results of each slide the slider, there appeared the following chart, from Figure 1, after sliding to the left block in Figure 2.
Figure I

Figure 2

Chart below is the main code block:

void SliderBoth::SetBlockColor()
CClientDC dc(this);
CRect rc;
GetClientRect(&rc);
int iNumTic=(pos.iMax-pos.iMin)/pos.iTick;
const int iL=MARGIN_SLIDE;
const int iR=rc.right-MARGIN_SLIDE;
const double dbStep=(iR-iL)*1.0/iNumTic;
double db=iL;
CBrush brush;   
brush.CreateSolidBrush(RGB(165,196,211));   
CBrush * pOldBrush= dc.SelectObject (&brush);

dc.Rectangle((int)lval+MARGIN_SLIDE*2,rc.top+1,(int)rval,rc.bottom-MARGIN_SLIDE*2);  
dc.SelectObject (pOldBrush);
brush.DeleteObject();
#endif
}

如何解决此问题，获得我有问题的DC?
请帮忙，谢谢！

How can we solve this problem, obtain the DC I have problems?
Please help, thank you!

推荐答案

在SetBlockColor()函数中，您应该只更改颜色，而不是将WM_PAINT消息发布到控件.
在覆盖的OnPaint()中，您应该进行绘制.

in the SetBlockColor() function you should only change the color and than post a WM_PAINT message to the control.

In the overriden OnPaint() you should do the drawing.

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