/// <summary>
/// Draws the point plot using the Drawing Context and x and y axes supplied
/// </summary>
/// <param name="ctx">The Drawing Context with which to draw.</param>
/// <param name="xAxis">The X-Axis to draw against.</param>
/// <param name="yAxis">The Y-Axis to draw against.</param>
public virtual void Draw(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
SequenceAdapter data_ = new SequenceAdapter(DataSource, DataMember, OrdinateData, AbscissaData);
double leftCutoff_ = xAxis.PhysicalMin.X - marker.Size;
double rightCutoff_ = xAxis.PhysicalMax.X + marker.Size;
ctx.Save();
ctx.SetColor(marker.LineColor);
ctx.SetLineWidth(marker.LineWidth);
for (int i = 0; i < data_.Count; ++i)
{
if (!Double.IsNaN(data_[i].X) && !Double.IsNaN(data_[i].Y))
{
Point xPos = xAxis.WorldToPhysical(data_[i].X, false);
if (xPos.X < leftCutoff_ || rightCutoff_ < xPos.X)
{
continue;
}
Point yPos = yAxis.WorldToPhysical(data_[i].Y, false);
marker.Draw(ctx, xPos.X, yPos.Y);
if (marker.DropLine)
{
Point yMin = new Point(data_[i].X, Math.Max(0.0, yAxis.Axis.WorldMin));
Point yStart = yAxis.WorldToPhysical(yMin.Y, false);
ctx.MoveTo(xPos.X, yStart.Y);
ctx.LineTo(xPos.X, yPos.Y);
ctx.Stroke();
}
}
}
ctx.Restore();
}
/// <summary>
/// Draws the marker on a plot surface.
/// </summary>
/// <param name="ctx">The Drawing Context with which to draw</param>
/// <param name="xAxis">The X-Axis to draw against.</param>
/// <param name="yAxis">The Y-Axis to draw against.</param>
public void Draw(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
Point point = new Point(
xAxis.WorldToPhysical(x_, true).X,
yAxis.WorldToPhysical(y_, true).Y);
marker_.Draw(ctx, point.X, point.Y);
}
/// <summary>
/// Draws the plot using the Drawing Context and X, Y axes supplied.
/// </summary>
public override void Draw(Context ctx, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
SequenceAdapter data =
new SequenceAdapter(this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData);
TextDataAdapter textData =
new TextDataAdapter(this.DataSource, this.DataMember, this.TextData);
TextLayout layout = new TextLayout();
layout.Font = Font;
ctx.Save();
ctx.SetColor(Colors.Black);
for (int i = 0; i < data.Count; ++i)
{
try {
Point p = data[i];
if (!Double.IsNaN(p.X) && !Double.IsNaN(p.Y))
{
Point xPos = xAxis.WorldToPhysical(p.X, false);
Point yPos = yAxis.WorldToPhysical(p.Y, false);
// first plot the marker
Marker.Draw(ctx, xPos.X, yPos.Y);
// then the label
if (textData[i] != "")
{
layout.Text = textData[i];
Size size = layout.GetSize();
switch (labelTextPosition)
{
case LabelPositions.Above:
p.X = xPos.X - size.Width / 2;
p.Y = yPos.Y - size.Height - Marker.Size * 2 / 3;
break;
case LabelPositions.Below:
p.X = xPos.X - size.Width / 2;
p.Y = yPos.Y + Marker.Size * 2 / 3;
break;
case LabelPositions.Left:
p.X = xPos.X - size.Width - Marker.Size * 2 / 3;
p.Y = yPos.Y - size.Height / 2;
break;
case LabelPositions.Right:
p.X = xPos.X + Marker.Size * 2 / 3;
p.Y = yPos.Y - size.Height / 2;
break;
}
ctx.DrawTextLayout(layout, p);
}
}
}
catch {
throw new XwPlotException("Error in TextPlot.Draw");
}
}
ctx.Restore();
}