public PlotIcon(Color color, PlotIconShape shape)
{
this.color = color;
this.shape = shape;
// All icon shape coordinates target points on a 4x4 grid
// This way, icon shapes can be mixed & matched and still look proper
halfSize = size / 2f;
quartSize = size / 4f;
threeQuartSize = quartSize * 3;
pen = new Pen(Color.White, lineWidth);
brush = new SolidBrush(Color.White);
bitmap = new Bitmap(size, size);
icon = Graphics.FromImage(bitmap);
icon.SmoothingMode = SmoothingMode.AntiAlias;
}
// Gets a PlotIcon for a given legend group. Returns cached version if available
public static PlotIcon GetIconForGroup(int group)
{
int colorTotal = SettingsPlotIcon.paletteColor.Count;
int shapeTotal = SettingsPlotIcon.paletteShape.Count;
if (SettingsPlot.IsTopographic())
{
colorTotal = 1; // Force a unique shape per group in topography mode, as color becomes indistinguishable
}
// Reduce the group number to find repeating icons
// For example, 3 shapes and 5 colors makes 15 icons. Group 15 is therefore the same as group 0.
group %= colorTotal * shapeTotal;
// Return this ploticon if it has already been generated.
if (plotIconCache.ContainsKey(group))
{
return(plotIconCache[group]);
}
// Identify which item from each palette should be used.
// First iterate through every color, then every palette, and repeat.
int colorIndex = group % colorTotal;
int shapeIndex = (group / colorTotal) % shapeTotal;
// Generate the PlotIcon
Color color = SettingsPlot.IsTopographic() ? SettingsPlotTopograph.legendColor : SettingsPlotIcon.paletteColor[colorIndex];
PlotIconShape shape = SettingsPlotIcon.paletteShape[shapeIndex];
PlotIcon plotIcon = new PlotIcon(color, shape);
// Register the icon in the cache and return it - Don't cache topography icons as they override the color
if (!SettingsPlot.IsTopographic())
{
plotIconCache.Add(group, plotIcon);
}
return(plotIcon);
}