/// <summary>
/// Draws the border around the plot area.
/// </summary>
internal override void Draw()
{
ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
if (cri.plotAreaRendererInfo.LineFormat != null && cri.plotAreaRendererInfo.LineFormat.Width > 0)
{
XGraphics gfx = _rendererParms.Graphics;
LineFormatRenderer lineFormatRenderer = new LineFormatRenderer(gfx, cri.plotAreaRendererInfo.LineFormat);
lineFormatRenderer.DrawRectangle(cri.plotAreaRendererInfo.Rect);
}
}
/// <summary>
/// Draws the content of the column plot area.
/// </summary>
internal override void Draw()
{
ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
XRect plotAreaBox = cri.plotAreaRendererInfo.Rect;
if (plotAreaBox.IsEmpty)
{
return;
}
XGraphics gfx = _rendererParms.Graphics;
double xMin = cri.xAxisRendererInfo.MinimumScale;
double xMax = cri.xAxisRendererInfo.MaximumScale;
double yMin = cri.yAxisRendererInfo.MinimumScale;
double yMax = cri.yAxisRendererInfo.MaximumScale;
LineFormatRenderer lineFormatRenderer;
// Under some circumstances it is possible that no zero base line will be drawn,
// e. g. because of unfavourable minimum/maximum scale and/or major tick, so force to draw
// a zero base line if necessary.
if (cri.yAxisRendererInfo.MajorGridlinesLineFormat != null ||
cri.yAxisRendererInfo.MinorGridlinesLineFormat != null)
{
if (yMin < 0 && yMax > 0)
{
XPoint[] points = new XPoint[2];
points[0].X = xMin;
points[0].Y = 0;
points[1].X = xMax;
points[1].Y = 0;
cri.plotAreaRendererInfo._matrix.TransformPoints(points);
lineFormatRenderer = cri.yAxisRendererInfo.MinorGridlinesLineFormat != null
? new LineFormatRenderer(gfx, cri.yAxisRendererInfo.MinorGridlinesLineFormat)
: new LineFormatRenderer(gfx, cri.yAxisRendererInfo.MajorGridlinesLineFormat);
lineFormatRenderer.DrawLine(points[0], points[1]);
}
}
// Draw columns
XGraphicsState state = gfx.Save();
foreach (SeriesRendererInfo sri in cri.seriesRendererInfos)
{
foreach (ColumnRendererInfo column in sri._pointRendererInfos)
{
// Do not draw column if value is outside yMin/yMax range. Clipping does not make sense.
if (IsDataInside(yMin, yMax, column.Point._value))
{
gfx.DrawRectangle(column.FillFormat, column.Rect);
}
}
}
// Draw borders around column.
// A border can overlap neighbor columns, so it is important to draw borders at the end.
foreach (SeriesRendererInfo sri in cri.seriesRendererInfos)
{
foreach (ColumnRendererInfo column in sri._pointRendererInfos)
{
// Do not draw column if value is outside yMin/yMax range. Clipping does not make sense.
if (IsDataInside(yMin, yMax, column.Point._value) && column.LineFormat.Width > 0)
{
lineFormatRenderer = new LineFormatRenderer(gfx, column.LineFormat);
lineFormatRenderer.DrawRectangle(column.Rect);
}
}
}
gfx.Restore(state);
}