_drawPolygon _xf beginPaint beginShape calcPenColor calcPenWidth copy drawArc drawArc3P drawArrayHead drawBeeline drawBeziers drawBeziers drawBSplines drawCircle drawEllipse drawEllipse drawHandle drawHermiteSplines drawLine drawLines drawPath drawPath_ drawPathWithArrayHead drawPie drawPolygon drawQuadSplines drawRayline drawRect drawRoundRect drawTextAt drawTextAt endPaint endShape fromHandle getBkColor getCanvas getClipBox getClipModel getClipWorld GiGraphics GiGraphics GiGraphics isDrawing isGrayMode isPrint isStopping m_impl operator= rawBeginPath rawBeziers rawBezierTo rawClosePath rawEllipse rawEndPath rawImage rawLine rawLines rawLineTo rawMoveTo rawPolygon rawQuadTo rawRect rawText setBkColor setBrush setClipBox setClipWorld setGrayMode setMaxPenWidth setPen setPenWidthFactor setPhaseEnabled stopDrawing toHandle xf ~GiGraphics

drawPie() bool GiGraphics::drawPie ( const GiContext *  ctx, const Point2d &  center, float  rx, float  ry, float  startAngle, float  sweepAngle, bool  modelUnit = true  ) 绘制并填充椭圆弧饼图，模型坐标或世界坐标 绘制一个由椭圆弧和两个半径相交闭合而成的饼状楔形图。 如果半长轴和半短轴的长度相同，则相当于圆弧。 参数 ctx 绘图参数，为NULL时取为上一个绘图参数 center 椭圆心 rx 椭圆半长轴的长度 ry 椭圆半短轴的长度，为0时取为rx startAngle 起始角度，弧度，相对于指定坐标系+X轴，逆时针为正 sweepAngle 转角，弧度，相对于起始角度，逆时针为正，顺时针为负， 大于2PI或小于-2PI时将取2PI或-2PI modelUnit 指定的坐标尺寸是模型坐标(true)还是世界坐标(false) 返回 是否显示成功。失败原因为参数错误或超出剪裁区域 函数调用图: