public ClassBreakViewModel()
{
minimum = 0;
classesCount = 5;
baseBrush = new GeoSolidBrush(GeoColor.FromHtml("#9ACD32"));
endBrush = new GeoSolidBrush(GeoColor.StandardColors.Red);
colorFields = new String[] { "Hue", "Saturation", "Lightness" };
selectedColorField = ClassBreakBy.Hue;
startColorName = "Start Color";
endColorName = "End Color";
colorPickerVisibility = Visibility.Visible;
sliderVisibility = Visibility.Collapsed;
}
private Collection <GeoSolidBrush> GetBreakdownBrushes(int breakCount, GeoSolidBrush baseBrush, GeoSolidBrush endBrush, ClassBreakBy breakColorMode)
{
Collection <GeoSolidBrush> brushes = new Collection <GeoSolidBrush>();
HSL baseHsl = GetHslFromRgb(baseBrush.Color.RedComponent, baseBrush.Color.GreenComponent, baseBrush.Color.BlueComponent);
HSL endHsl = null;
if (breakColorMode == ClassBreakBy.Hue)
{
endHsl = GetHslFromRgb(endBrush.Color.RedComponent, endBrush.Color.GreenComponent, endBrush.Color.BlueComponent);
var averageH = (endHsl.Hue - baseHsl.Hue) / (breakCount - 1);
var averageS = (endHsl.Saturation - baseHsl.Saturation) / (breakCount - 1);
var averageL = (endHsl.Luminance - baseHsl.Luminance) / (breakCount - 1);
var averageAlpha = (endBrush.Color.AlphaComponent - baseBrush.Color.AlphaComponent) / (breakCount - 1);
brushes.Add(baseBrush);
for (int i = 1; i <= breakCount - 2; i++)
{
HSL generatedHsl = new HSL(baseHsl.Hue, baseHsl.Saturation, baseHsl.Luminance);
generatedHsl.Hue += averageH * i;
generatedHsl.Saturation += averageS * i;
generatedHsl.Luminance += averageL * i;
brushes.Add(GetSolidBrushFromHsl((byte)((int)baseBrush.Color.AlphaComponent + averageAlpha * i), generatedHsl));
}
brushes.Add(endBrush);
}
else
{
endHsl = new HSL(baseHsl.Hue, baseHsl.Saturation, baseHsl.Luminance);
if (breakColorMode == ClassBreakBy.Saturation)
{
endHsl.Saturation = this.currentValue;
var averageS = (baseHsl.Saturation - currentValue) / (breakCount - 1);
brushes.Add(GetSolidBrushFromHsl(baseBrush.Color.AlphaComponent, endHsl));
for (int i = 1; i <= breakCount - 2; i++)
{
HSL generatedHsl = new HSL(endHsl.Hue, endHsl.Saturation, endHsl.Luminance);
generatedHsl.Saturation += averageS * i;
brushes.Add(GetSolidBrushFromHsl(baseBrush.Color.AlphaComponent, generatedHsl));
}
brushes.Add(baseBrush);
}
else
{
endHsl.Luminance = this.currentValue;
var averageL = (baseHsl.Luminance - currentValue) / (breakCount - 1);
brushes.Add(GetSolidBrushFromHsl(baseBrush.Color.AlphaComponent, endHsl));
for (int i = 1; i <= breakCount - 2; i++)
{
HSL generatedHsl = new HSL(endHsl.Hue, endHsl.Saturation, endHsl.Luminance);
generatedHsl.Luminance += averageL * i;
brushes.Add(GetSolidBrushFromHsl(baseBrush.Color.AlphaComponent, generatedHsl));
}
brushes.Add(baseBrush);
}
}
return(brushes);
}
