/// <summary>
/// Draws the legend.
/// </summary>
internal override void Draw()
{
ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
LegendRendererInfo lri = cri.legendRendererInfo;
if (lri == null)
{
return;
}
XGraphics gfx = _rendererParms.Graphics;
RendererParameters parms = new RendererParameters
{
Graphics = gfx
};
LegendEntryRenderer ler = new LegendEntryRenderer(parms);
bool verticalLegend = lri._legend._docking == DockingType.Left || lri._legend._docking == DockingType.Right;
int paddingFactor = 1;
if (lri.BorderPen != null)
{
paddingFactor = 2;
}
XRect legendRect = lri.Rect;
legendRect.X += LegendRenderer.LeftPadding * paddingFactor;
legendRect.Y += LegendRenderer.TopPadding * paddingFactor;
foreach (LegendEntryRendererInfo leri in cri.legendRendererInfo.Entries)
{
XRect entryRect = legendRect;
entryRect.Width = leri.Width;
entryRect.Height = leri.Height;
leri.Rect = entryRect;
parms.RendererInfo = leri;
ler.Draw();
if (verticalLegend)
{
legendRect.Y += entryRect.Height + LegendRenderer.EntrySpacing;
}
else
{
legendRect.X += entryRect.Width + LegendRenderer.EntrySpacing;
}
}
// Draw border around legend
if (lri.BorderPen != null)
{
XRect borderRect = lri.Rect;
borderRect.X += LegendRenderer.LeftPadding;
borderRect.Y += LegendRenderer.TopPadding;
borderRect.Width -= LegendRenderer.LeftPadding + LegendRenderer.RightPadding;
borderRect.Height -= LegendRenderer.TopPadding + LegendRenderer.BottomPadding;
gfx.DrawRectangle(lri.BorderPen, borderRect);
}
}
/// <summary>
/// Layouts and calculates the space used by the legend.
/// </summary>
internal override void Format()
{
ChartRendererInfo cri = (ChartRendererInfo)_rendererParms.RendererInfo;
LegendRendererInfo lri = cri.legendRendererInfo;
if (lri == null)
{
return;
}
RendererParameters parms = new RendererParameters
{
Graphics = _rendererParms.Graphics
};
bool verticalLegend = lri._legend._docking == DockingType.Left || lri._legend._docking == DockingType.Right;
XSize maxMarkerArea = new XSize();
LegendEntryRenderer ler = new LegendEntryRenderer(parms);
foreach (LegendEntryRendererInfo leri in lri.Entries)
{
parms.RendererInfo = leri;
ler.Format();
maxMarkerArea.Width = Math.Max(leri.MarkerArea.Width, maxMarkerArea.Width);
maxMarkerArea.Height = Math.Max(leri.MarkerArea.Height, maxMarkerArea.Height);
if (verticalLegend)
{
lri.Width = Math.Max(lri.Width, leri.Width);
lri.Height += leri.Height;
}
else
{
lri.Width += leri.Width;
lri.Height = Math.Max(lri.Height, leri.Height);
}
}
// Add padding to left, right, top and bottom
int paddingFactor = 1;
if (lri.BorderPen != null)
{
paddingFactor = 2;
}
lri.Width += (LegendRenderer.LeftPadding + LegendRenderer.RightPadding) * paddingFactor;
lri.Height += (LegendRenderer.TopPadding + LegendRenderer.BottomPadding) * paddingFactor;
if (verticalLegend)
{
lri.Height += LegendRenderer.EntrySpacing * (lri.Entries.Length - 1);
}
else
{
lri.Width += LegendRenderer.EntrySpacing * (lri.Entries.Length - 1);
}
foreach (LegendEntryRendererInfo leri in lri.Entries)
{
leri.MarkerArea = maxMarkerArea;
}
}
