protected override Collection<Style> GetStylesCore(FeatureSource featureSource)
{
// here we generate CustomDotDensityStyle.
double totalValue = 0;
featureSource.Open();
int featureCount = featureSource.GetCount();
for (int i = 0; i < featureCount; i++)
{
Feature feature = featureSource.GetFeatureById((i + 1).ToString(CultureInfo.InvariantCulture), SelectedColumns);
double columnValue;
if (double.TryParse(feature.ColumnValues[SelectedColumns[0]], out columnValue))
{
totalValue += columnValue;
}
}
featureSource.Close();
CustomDotDensityStyle dotDensityStyle = new CustomDotDensityStyle();
dotDensityStyle.ColumnName = SelectedColumns[0];
dotDensityStyle.PointToValueRatio = DotDensityValue / (totalValue / featureCount);
dotDensityStyle.CustomPointStyle = PointStyles.CreateSimpleCircleStyle(GeoColor.FromArgb(Opacity, Color), 4);
return new Collection<Style>() { dotDensityStyle };
}
protected override Collection <Style> GetStylesCore(FeatureSource featureSource)
{
double totalValue = 0;
featureSource.Open();
int featureCount = featureSource.GetCount();
for (int i = 0; i < featureCount; i++)
{
Feature feature = featureSource.GetFeatureById((i + 1).ToString(CultureInfo.InvariantCulture), SelectedColumns);
double columnValue;
double.TryParse(feature.ColumnValues[SelectedColumns[0]], out columnValue);
totalValue += columnValue;
}
featureSource.Close();
CustomDotDensityStyle dotDensityStyle = new CustomDotDensityStyle();
dotDensityStyle.ColumnName = SelectedColumns[0];
dotDensityStyle.PointToValueRatio = DotDensityValue / (totalValue / featureCount);
dotDensityStyle.CustomPointStyle = PointStyles.CreateSimpleCircleStyle(GeoColor.FromArgb(Opacity, Color), 4);
return(new Collection <Style>()
{
dotDensityStyle
});
}
private void AddDotDensityLegendItems(LegendAdornmentLayer legendAdornmentLayer)
{
CustomDotDensityStyle dotDensityStyle = (CustomDotDensityStyle)currentStyleBuilder.GetStyles(currentFeatureLayer.FeatureSource)[0];
// Here we generate 4 legend items, for 5, 10, 20 and 50 points seperately.
int[] pointCounts = new int[] { 5, 10, 20, 50 };
foreach (int pointCount in pointCounts)
{
LegendItem legendItem = new LegendItem();
legendItem.ImageMask = new AreaStyle(new GeoPen(GeoColor.StandardColors.LightGray, 1), new GeoSolidBrush(GeoColor.SimpleColors.Transparent));
legendItem.ImageWidth = 48;
legendItem.TextTopPadding = 16;
legendItem.TextRightPadding = 5;
legendItem.BottomPadding = 16;
legendItem.TopPadding = 16;
legendItem.RightPadding = 5;
CustomDotDensityStyle legendDotDensityStyle = (CustomDotDensityStyle)dotDensityStyle.CloneDeep();
legendDotDensityStyle.DrawingPointsNumber = pointCount;
legendItem.ImageStyle = legendDotDensityStyle;
string text = string.Format(CultureInfo.InvariantCulture, "{0:0.####}", TextFormatter.GetFormatedStringForLegendItem(dotDensityStyle.ColumnName, (pointCount / dotDensityStyle.PointToValueRatio)));
legendItem.TextStyle = new TextStyle(text, new GeoFont("Segoe UI", 10), new GeoSolidBrush(GeoColor.SimpleColors.Black));
legendAdornmentLayer.LegendItems.Add(legendItem);
}
}
protected override Style GetStyleCore(FeatureSource featureSource)
{
double totalValue = 0;
featureSource.Open();
int featureCount = featureSource.GetCount();
for (int i = 0; i < featureCount; i++)
{
Feature feature = featureSource.GetFeatureById((i + 1).ToString(CultureInfo.InvariantCulture), SelectedColumns);
double columnValue;
double.TryParse(feature.ColumnValues[SelectedColumns[0]], out columnValue);
totalValue += columnValue;
}
featureSource.Close();
double pointToValueRatio = DotDensityValue / (totalValue / featureCount);
CustomDotDensityStyle dotDensityStyle = new CustomDotDensityStyle();
dotDensityStyle.ColumnName = SelectedColumns[0];
dotDensityStyle.PointToValueRatio = pointToValueRatio;
dotDensityStyle.CustomPointStyle = new PointStyle(PointSymbolType.Circle, new GeoSolidBrush(GeoColor.FromArgb(Opacity, Color)), 4);
return(dotDensityStyle);
}
protected override void DrawCore(GeoCanvas geoCanvas, Style style)
{
Bitmap bitmap = new Bitmap(50, 50);
CustomDotDensityStyle dotDensityStyle = style as CustomDotDensityStyle;
RectangleShape drawingExtent = new RectangleShape(-180, 90, 180, -90);
// Draw Icon Outline
geoCanvas.BeginDrawing(bitmap, drawingExtent, GeographyUnit.DecimalDegree);
geoCanvas.DrawArea(drawingExtent, new GeoPen(GeoColor.FromHtml("#cccccc"), 2), DrawingLevel.LevelOne);
// Draw Icon points
Random random = new Random(DateTime.Now.Millisecond);
Collection <BaseShape> mockupPoints = new Collection <BaseShape>();
for (int i = 0; i < DotCount; i++)
{
double x = random.NextDouble() * (drawingExtent.LowerRightPoint.X - drawingExtent.LowerLeftPoint.X) + drawingExtent.LowerLeftPoint.X;
double y = random.NextDouble() * (drawingExtent.UpperLeftPoint.Y - drawingExtent.LowerLeftPoint.Y) + drawingExtent.LowerLeftPoint.Y;
mockupPoints.Add(new PointShape(x, y));
}
dotDensityStyle.CustomPointStyle.Draw(mockupPoints, geoCanvas, new Collection <SimpleCandidate>(), new Collection <SimpleCandidate>());
// Draw Icon Label
geoCanvas.DrawText(DotCount.ToString("N0"), LabelFont, LabelBrush, null, new ScreenPointF[] { new ScreenPointF(20f, 20f) }, DrawingLevel.LabelLevel, 0, 0, 0);
geoCanvas.EndDrawing();
Title = string.Format(CultureInfo.InvariantCulture, "{0:0.####}", MapSuiteSampleHelper.GetFormatedStringForLegendItem(dotDensityStyle.ColumnName, (DotCount / dotDensityStyle.PointToValueRatio)));
Image = bitmap;
}