/// <summary>
/// Draw the <see c_ref="Symbol"/> to the specified <see c_ref="Graphics"/> device
/// at the specified location. This routine draws a single symbol.
/// </summary>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="pane">
/// A reference to the <see c_ref="ZedGraph.GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="x">The x position of the center of the symbol in
/// pixel units</param>
/// <param name="y">The y position of the center of the symbol in
/// pixel units</param>
/// <param name="scaleFactor">
/// The scaling factor for the features of the graph based on the <see c_ref="PaneBase.BaseDimension"/>. This
/// scaling factor is calculated by the <see c_ref="PaneBase.CalcScaleFactor"/> method. The scale factor
/// represents a linear multiple to be applied to font sizes, symbol sizes, etc.
/// </param>
/// <param name="dataValue">The data value to be used for a value-based
/// color gradient. This is only applicable for <see c_ref="FillType.GradientByX"/>,
/// <see c_ref="FillType.GradientByY"/> or <see c_ref="FillType.GradientByZ"/>.</param>
/// <param name="isSelected">Indicates that the <see c_ref="Symbol" /> should be drawn
/// with attributes from the <see c_ref="Selection" /> class.
/// </param>
public void DrawSymbol(Graphics g, GraphPane pane, int x, int y,
float scaleFactor, bool isSelected, PointPair dataValue)
{
Symbol source = this;
if (isSelected)
{
source = Selection.Symbol;
}
// Only draw if the symbol is visible
if (_isVisible &&
Type != SymbolType.None &&
x < 100000 && x > -100000 &&
y < 100000 && y > -100000)
{
SmoothingMode sModeSave = g.SmoothingMode;
if (_isAntiAlias)
{
g.SmoothingMode = SmoothingMode.HighQuality;
}
using (Pen pen = _border.GetPen(pane, scaleFactor, dataValue))
using (GraphicsPath path = MakePath(g, scaleFactor))
using (Brush brush = Fill.MakeBrush(path.GetBounds(), dataValue))
{
DrawSymbol(g, x, y, path, pen, brush);
}
g.SmoothingMode = sModeSave;
}
}
/// <summary>
/// Render the label for this <see c_ref="PieItem"/>.
/// </summary>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="pane">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="rect">Bounding rectangle for this <see c_ref="PieItem"/>.</param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see c_ref="ZedGraph.GraphPane"/> object using the
/// <see c_ref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
public void DrawLabel(Graphics g, GraphPane pane, RectangleF rect, float scaleFactor)
{
if (!_labelDetail.IsVisible)
{
return;
}
using (Pen labelPen = Border.GetPen(pane, scaleFactor))
{
//draw line from intersection point to pivot point -
g.DrawLine(labelPen, _intersectionPoint, _pivotPoint);
//draw horizontal line to move label away from pie...
g.DrawLine(labelPen, _pivotPoint, _endPoint);
}
//draw the label (TextObj)
_labelDetail.Draw(g, pane, scaleFactor);
}
/// <summary>
/// Do all rendering associated with this <see c_ref="GasGaugeRegion"/> item to the specified
/// <see c_ref="Graphics"/> device. This method is normally only
/// called by the Draw method of the parent <see c_ref="ZedGraph.CurveList"/>
/// collection object.
/// </summary>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="pane">
/// A reference to the <see c_ref="ZedGraph.GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="pos">Not used for rendering GasGaugeNeedle</param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see c_ref="ZedGraph.GraphPane"/> object using the
/// <see c_ref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
public override void Draw(Graphics g, GraphPane pane, int pos, float scaleFactor)
{
if (pane.Chart._rect.Width <= 0 && pane.Chart._rect.Height <= 0)
{
_slicePath = null;
}
else
{
CalcRectangle(g, pane, scaleFactor, pane.Chart._rect);
_slicePath = new GraphicsPath();
if (!_isVisible)
{
return;
}
RectangleF tRect = _boundingRectangle;
if (tRect.Width >= 1 && tRect.Height >= 1)
{
SmoothingMode sMode = g.SmoothingMode;
g.SmoothingMode = SmoothingMode.AntiAlias;
_slicePath.AddPie(tRect.X, tRect.Y, tRect.Width, tRect.Height,
-0.0f, -180.0f);
g.FillPie(Fill.MakeBrush(_boundingRectangle), tRect.X, tRect.Y, tRect.Width, tRect.Height, -StartAngle, -SweepAngle);
if (Border.IsVisible)
{
Pen borderPen = _border.GetPen(pane, scaleFactor);
g.DrawPie(borderPen, tRect.X, tRect.Y, tRect.Width, tRect.Height,
-0.0f, -180.0f);
borderPen.Dispose();
}
g.SmoothingMode = sMode;
}
}
}
/// <summary>
/// Do all rendering associated with this <see c_ref="PieItem"/> item to the specified
/// <see c_ref="Graphics"/> device. This method is normally only
/// called by the Draw method of the parent <see c_ref="ZedGraph.CurveList"/>
/// collection object.
/// </summary>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="pane">
/// A reference to the <see c_ref="ZedGraph.GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="pos">Not used for rendering Pies</param>param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see c_ref="ZedGraph.GraphPane"/> object using the
/// <see c_ref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
override public void Draw(Graphics g, GraphPane pane, int pos, float scaleFactor)
{
if (pane.Chart._rect.Width <= 0 && pane.Chart._rect.Height <= 0)
{
//pane.PieRect = RectangleF.Empty;
_slicePath = null;
}
else
{
//pane.PieRect = CalcPieRect( g, pane, scaleFactor, pane.ChartRect );
CalcPieRect(g, pane, scaleFactor, pane.Chart._rect);
_slicePath = new GraphicsPath();
if (!_isVisible)
{
return;
}
RectangleF tRect = _boundingRectangle;
if (tRect.Width >= 1 && tRect.Height >= 1)
{
SmoothingMode sMode = g.SmoothingMode;
g.SmoothingMode = SmoothingMode.AntiAlias;
Fill tFill = _fill;
Border tBorder = _border;
if (IsSelected)
{
tFill = Selection.Fill;
tBorder = Selection.Border;
}
using (Brush brush = tFill.MakeBrush(_boundingRectangle))
{
g.FillPie(brush, tRect.X, tRect.Y, tRect.Width, tRect.Height, StartAngle, SweepAngle);
//add GraphicsPath for hit testing
_slicePath.AddPie(tRect.X, tRect.Y, tRect.Width, tRect.Height,
StartAngle, SweepAngle);
if (Border.IsVisible)
{
using (Pen borderPen = tBorder.GetPen(pane, scaleFactor))
{
g.DrawPie(borderPen, tRect.X, tRect.Y, tRect.Width, tRect.Height,
StartAngle, SweepAngle);
}
}
if (_labelType != PieLabelType.None)
{
DrawLabel(g, pane, tRect, scaleFactor);
}
//brush.Dispose();
}
g.SmoothingMode = sMode;
}
}
}