RedJini Blog

GDI+에서 Round Rectangle 그리기.

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void GetRoundedRect(GraphicsPath* pPath, RectF baseRect, float radius){
 if( radius<=0.0F ){ 
 pPath->AddRectangle(baseRect); 
 pPath->CloseFigure(); 
 return;
 }
 if( radius>=(min(baseRect.Width, baseRect.Height))/2.0){
 GetCapsule(pPath, baseRect); 
 return;
 }
 float diameter = radius * 2.0F; 
 RectF arc ( baseRect.X, baseRect.Y, diameter, diameter); 
 pPath->AddArc( arc, 180, 90 ); 
 arc.X = baseRect.GetRight() -diameter; 
 pPath->AddArc( arc, 270, 90 ); 
 arc.Y = baseRect.GetBottom() -diameter; 
 pPath->AddArc( arc, 0, 90 ); 
 arc.X = baseRect.GetLeft();
 pPath->AddArc( arc, 90, 90 ); 
 pPath->CloseFigure(); 
}

void GetCapsule(GraphicsPath* pPath, RectF baseRect){ 
 float diameter; 
 
 TRY{ 
 if( baseRect.Width > baseRect.Height){ 
 diameter = baseRect.Height; 
 RectF arc( baseRect.X, baseRect.Y, diameter, diameter); 
 pPath->AddArc( arc, 90, 180); 
 arc.X = baseRect.GetRight()-diameter; 
 pPath->AddArc( arc, 270, 180); 
 }else if( baseRect.Width < baseRect.Height ){ 
 diameter = baseRect.Width;
 
 RectF arc( baseRect.X, baseRect.Y, diameter, diameter ); 
 pPath->AddArc( arc, 180, 180 ); 
 arc.Y = baseRect.GetBottom() -diameter; 
 pPath->AddArc( arc, 0, 180 ); 
 }else{ 
 pPath->AddEllipse( baseRect ); 
 }
 }CATCH(CException, ex){
 pPath->AddEllipse( baseRect ); 
 }
 END_CATCH
 pPath->CloseFigure(); 
}

사용 예)

RectF PaintRect(WndRect.Width()/2-200, WndRect.Height()/2-100, 400, 200);

LinearGradientBrush BackBrush(PaintRect , Color(255,255,255), Color(57,109,194), LinearGradientModeVertical);
Pen BackPen (Color(57,109,194), 3);

GraphicsPath RoundPath;
GetRoundedRect(&RoundPath, PaintRect, 10);

pMemG->FillPath(&BackBrush, &RoundPath);
pMemG->DrawPath(&BackPen, &RoundPath);

자료 참고: codeproject.com

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