// 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);
}
// Draw and return the icon image
public Image GetIconImage()
{
// Regenerate the icon image in topography mode, since we tend to update the color
if (iconImage != null && !SettingsPlot.IsTopographic())
{
return(iconImage);
}
if (shape.crosshairInner)
{
icon.DrawLine(pen, halfSize, quartSize, halfSize, threeQuartSize); // Vertical
icon.DrawLine(pen, quartSize, halfSize, threeQuartSize, halfSize); // Horizontal
}
if (shape.crosshairOuter)
{
icon.DrawLine(pen, halfSize, size, halfSize, threeQuartSize); // Top
icon.DrawLine(pen, halfSize, 0, halfSize, quartSize); // Bottom
icon.DrawLine(pen, 0, halfSize, quartSize, halfSize); // Left
icon.DrawLine(pen, size, halfSize, threeQuartSize, halfSize); // Right
}
if (shape.diamond)
{
PointF[] diamondCorners =
{
new PointF(halfSize, quartSize), // Top
new PointF(quartSize, halfSize), // Bottom
new PointF(halfSize, threeQuartSize), // Left
new PointF(threeQuartSize, halfSize), // Right
};
if (shape.fill)
{
icon.FillPolygon(brush, diamondCorners);
}
else
{
icon.DrawPolygon(pen, diamondCorners);
}
}
if (shape.square || shape.circle)
{
Rectangle halfRadiusRect = new Rectangle((int)quartSize, (int)quartSize, (int)halfSize, (int)halfSize);
if (shape.square)
{
if (shape.fill)
{
icon.FillRectangle(brush, halfRadiusRect);
}
else
{
icon.DrawRectangle(pen, halfRadiusRect);
}
}
if (shape.circle)
{
if (shape.fill)
{
icon.FillEllipse(brush, halfRadiusRect);
}
else
{
icon.DrawEllipse(pen, halfRadiusRect);
}
}
}
iconImage = ImageTools.AdjustARGB(bitmap, Color.FromArgb((int)(iconOpacityPercent / 100f * 255f), color));
iconImage = ImageTools.AddDropShadow(iconImage, lineWidth, (int)(shadowOpacityPercent / 100f * 255f));
return(iconImage);
}
