private static void DrawDotDensityStyle(PointStyle pointStyle, PlatformGeoCanvas canvas, DrawingRectangleF drawingRectangleF)
{
if (pointStyle == null)
{
return;
}
var tmpSymbolSize = pointStyle.SymbolSize;
var tmpSymbolPenWidth = pointStyle.SymbolPen.Width;
var tmpFontSize = pointStyle.CharacterFont.Size;
Bitmap originalBitmap = null;
Bitmap newBitmap = null;
try
{
var customerSymbolStyle = pointStyle as SymbolPointStyle;
if (customerSymbolStyle != null)
{
originalBitmap = canvas.ToNativeImage(customerSymbolStyle.Image) as Bitmap;
newBitmap = new Bitmap(originalBitmap, 9, 9);
customerSymbolStyle.Image = canvas.ToGeoImage(newBitmap);
}
else
{
pointStyle.SymbolSize = 3;
pointStyle.SymbolPen.Width = 1;
pointStyle.CharacterFont = new GeoFont(pointStyle.CharacterFont.FontName, 6, pointStyle.CharacterFont.Style);
}
var halfWidth = drawingRectangleF.Width * 0.5f;
var halfHeight = drawingRectangleF.Height * 0.5f;
float[] centersX = new float[7];
float[] centersY = new float[7];
centersX[0] = halfWidth * 0.5f - 1;
centersY[0] = halfHeight * 0.5f - 1;
centersX[1] = centersX[0] + 2;
centersY[1] = centersY[0] + 2;
centersX[2] = halfWidth;
centersY[2] = halfHeight;
centersX[3] = halfWidth + halfWidth * 0.5f;
centersY[3] = halfHeight;
centersX[4] = halfWidth + halfWidth * 0.5f;
centersY[4] = halfHeight + halfHeight * 0.5f;
centersX[5] = centersX[4] - 1;
centersY[5] = centersY[4] - 1;
centersX[6] = centersX[4] + 1;
centersY[6] = centersY[4] + 1;
for (int i = 0; i < 7; i++)
{
float centerX = centersX[i];
float centerY = centersY[i];
if (pointStyle != null)
{
pointStyle.DrawSample(canvas, new DrawingRectangleF(centerX, centerY, 11, 11));
}
}
if (originalBitmap != null)
{
customerSymbolStyle.Image = canvas.ToGeoImage(originalBitmap);
}
else
{
pointStyle.SymbolSize = tmpSymbolSize;
pointStyle.SymbolPen.Width = tmpSymbolPenWidth;
pointStyle.CharacterFont = new GeoFont(pointStyle.CharacterFont.FontName, tmpFontSize, pointStyle.CharacterFont.Style);
}
}
finally
{
if (originalBitmap != null)
{
originalBitmap.Dispose();
}
if (newBitmap != null)
{
newBitmap.Dispose();
}
}
}