soui实现弧形文本

ceffans

1. 
   

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1. //先计算弧形分块
   
2. SStringW sstrContent = L"1234567890A";
   
3. int nWords = sstrContent.GetLength();
   
4. double dStepAngle = 180.0 / (nWords + 1);
   
5. //指定弧形的圆心，此处以绘制文本区域的下边的中点为圆心
   
6. CRect rcWindow = GetClientRect();
   
7. CPoint ptOrg = rcWindow.CenterPoint();
   
8. ptOrg.y = rcWindow.bottom;
   
9. for (int i = 0; i < nWords; i++)
   
10. {
    
11.     double dAngle = i * dStepAngle + dStepAngle;
    
12.     SStringW sstrWord = sstrContent.GetAt(i);
    
13.     SMatrix matrix;
    
14.     matrix.setRotate(dAngle + 270, ptOrg.x, ptOrg.y);  //此处按角度是以90度的方向开始，就给加了270度
    
15.     pRT->SetTransform(matrix.GetData(), NULL);
    
16.     pRT->DrawText(sstrWord, 1, rcWindow, DT_SINGLELINE | DT_CENTER | DT_TOP);
    
17.     pRT->SetTransform(SMatrix().GetData());
    
18.                         }

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setoutsoft

贴上效果图。