private void btnToBitmap_Click(object sender, RoutedEventArgs e)
{
PrinterInteractiveOverlay printerInteractiveOverlay = (PrinterInteractiveOverlay)Map1.InteractiveOverlays["PrintPreviewOverlay"];
PagePrinterLayer pagePrinterLayer = printerInteractiveOverlay.PrinterLayers["PageLayer"] as PagePrinterLayer;
// Create a bitmap that is the size of the pages bounding box. The page by default is in points unit
// system which is very similar to pixels so that ampping is nice.
GeoImage bitmap = null;
try
{
bitmap = new GeoImage((int)pagePrinterLayer.GetBoundingBox().Width, (int)pagePrinterLayer.GetBoundingBox().Height);
// Create a GeoCanvas and start the drawing
GeoCanvas gdiPlusGeoCanvas = GeoCanvas.CreateDefaultGeoCanvas();
gdiPlusGeoCanvas.BeginDrawing(bitmap, pagePrinterLayer.GetBoundingBox(), Map1.MapUnit);
// Loop through all of the PrintingLayer in the PrinterInteractiveOverlay and print all of the
// except for the PagePrinterLayer
Collection <SimpleCandidate> labelsInAllLayers = new Collection <SimpleCandidate>();
foreach (PrinterLayer printerLayer in printerInteractiveOverlay.PrinterLayers)
{
printerLayer.IsDrawing = true;
if (!(printerLayer is PagePrinterLayer))
{
printerLayer.Draw(gdiPlusGeoCanvas, labelsInAllLayers);
}
printerLayer.IsDrawing = false;
}
// End the drawing
gdiPlusGeoCanvas.EndDrawing();
//Save the resulting bitmap to a file and open the file to show the user
string filename = "PrintingResults.bmp";
bitmap.Save(filename);
Process.Start("explorer.exe", filename);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message + " " + ex.StackTrace, "Exception");
}
finally
{
if (bitmap != null)
{
bitmap.Dispose();
}
}
}
protected override void DrawCore(IEnumerable <Feature> features, GeoCanvas canvas, System.Collections.ObjectModel.Collection <SimpleCandidate> labelsInThisLayer, System.Collections.ObjectModel.Collection <SimpleCandidate> labelsInAllLayers)
{
Bitmap intensityBitmap = null;
Bitmap colorBitmap = null;
GeoImage geoImage = null;
MemoryStream pngStream = null;
try
{
// Load the default color palette if it does not exisit
// or does not have the right amount of colors
if (colorPalette.Count != 256)
{
colorPalette = GetDefaultColorPalette();
}
intensityBitmap = new Bitmap(Convert.ToInt32(canvas.Width), Convert.ToInt32(canvas.Height));
Graphics Surface = Graphics.FromImage(intensityBitmap);
Surface.Clear(Color.Transparent);
Surface.Dispose();
List <HeatPoint> heatPoints = new List <HeatPoint>();
foreach (Feature feature in features)
{
if (feature.GetWellKnownType() == WellKnownType.Point)
{
PointShape pointShape = (PointShape)feature.GetShape();
ScreenPointF screenPoint = ExtentHelper.ToScreenCoordinate(canvas.CurrentWorldExtent, pointShape, canvas.Width, canvas.Height);
double realValue;
if (intensityRangeStart != 0 && intensityRangeEnd != 0 && intensityRangeStart != intensityRangeEnd && intensityColumnName != string.Empty)
{
if (intensityRangeStart < intensityRangeEnd)
{
realValue = (255 / (intensityRangeEnd - intensityRangeStart)) * (GetDoubleValue(feature.ColumnValues[intensityColumnName], intensityRangeStart, intensityRangeEnd) - intensityRangeStart);
}
else
{
realValue = (255 / (intensityRangeEnd - intensityRangeStart)) * (intensityRangeEnd - GetDoubleValue(feature.ColumnValues[intensityColumnName], intensityRangeStart, intensityRangeEnd));
}
}
else
{
realValue = intensity;
}
HeatPoint heatPoint = new HeatPoint(Convert.ToInt32(screenPoint.X), Convert.ToInt32(screenPoint.Y), Convert.ToByte(realValue));
heatPoints.Add(heatPoint);
}
}
//Calls the function to get the pixel size of the point based on the world point size and the current extent of the map.
float size = GetPointSize(canvas);
// Create the intensity bitmap
intensityBitmap = CreateIntensityMask(intensityBitmap, heatPoints, Convert.ToInt32(size));
// Color the intensity bitmap
colorBitmap = Colorize(intensityBitmap, (byte)alpha, colorPalette);
// Create a geoimage from the color bitmap
pngStream = new MemoryStream();
colorBitmap.Save(pngStream, System.Drawing.Imaging.ImageFormat.Png);
geoImage = new GeoImage(pngStream);
// Write the geoimage to the canvas
canvas.DrawWorldImageWithoutScaling(geoImage, canvas.CurrentWorldExtent.GetCenterPoint().X, canvas.CurrentWorldExtent.GetCenterPoint().Y, DrawingLevel.LevelOne);
}
finally
{
// Make sure we clean up all the memeory that we use durring the process
if (intensityBitmap != null)
{
intensityBitmap.Dispose();
}
if (colorBitmap != null)
{
colorBitmap.Dispose();
}
if (geoImage != null)
{
geoImage.Dispose();
}
if (pngStream != null)
{
pngStream.Dispose();
}
}
}
