/// <summary>
/// Export a legend image with specific requirements (bug 1015)
/// </summary>
/// <param name="map">The map object</param>
/// <param name="width">The desired legend width</param>
/// <param name="height">The desired legend height</param>
/// <returns></returns>
public static byte[] ExportLegend(mapObj map)
{
int width = 10;
int height = 10;
Bitmap bmp = null;
Graphics g = null;
for (int phase = 0; phase < 2; phase++)
{
if (phase == 0)
{
bmp = new Bitmap(100, 100, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
}
else
{
bmp = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
}
g = Graphics.FromImage(bmp);
Stack groupPositions = new Stack(); // for storing the group text positions
Font legendFont = new Font("MS Sans Sherif", 8); // set default font
g.Clear(Color.White); // clear the background
int xPos = 5; // padding
int yPos = 5;
int xOffset = 24; // legend indent in pixels
int yOffset = 18; // item height in pixels
// force the recalculation of the current scale
map.setExtent(map.extent.minx, map.extent.miny, map.extent.maxx, map.extent.maxy);
// start drawing the legend in reverse layer order
using (intarray ar = map.getLayersDrawingOrder())
{
for (int i = map.numlayers - 1; i >= 0; i--)
{
layerObj layer = map.getLayer(ar.getitem(i));
if (layer.name == "__embed__scalebar" || layer.name == "__embed__legend" ||
layer.status == mapscript.MS_OFF || layer.name.StartsWith("~"))
{
continue;
}
if (map.scaledenom > 0)
{
if (layer.maxscaledenom > 0 && map.scaledenom > layer.maxscaledenom)
{
continue;
}
if (layer.minscaledenom > 0 && map.scaledenom <= layer.minscaledenom)
{
continue;
}
}
if (layer.maxscaledenom <= 0 && layer.minscaledenom <= 0)
{
if (layer.maxgeowidth > 0 && ((map.extent.maxx - map.extent.minx) > layer.maxgeowidth))
{
continue;
}
if (layer.mingeowidth > 0 && ((map.extent.maxx - map.extent.minx) < layer.mingeowidth))
{
continue;
}
}
// draw raster or WMS layers
if (layer.type == MS_LAYER_TYPE.MS_LAYER_RASTER)
{
if (phase == 1)
{
g.DrawIcon(global::MapLibrary.Properties.Resources.raster, xPos, yPos);
g.DrawString(layer.name, legendFont, Brushes.Black, xPos + 30, yPos + 2);
}
SizeF size = g.MeasureString(layer.name, legendFont);
if (xPos + 30 + size.Width + 5 > width)
{
width = Convert.ToInt32(xPos + 30 + size.Width + 5);
}
yPos += yOffset;
continue;
}
int numClasses = 0;
Image legendImage = null;
string legendText = null;
for (int j = 0; j < layer.numclasses; j++)
{
classObj layerclass = layer.getClass(j);
if (layerclass.name == "EntireSelection" || layerclass.name == "CurrentSelection")
{
continue;
}
if (layerclass.status == mapscript.MS_OFF)
{
continue;
}
if (map.scaledenom > 0)
{ /* verify class scale here */
if (layerclass.maxscaledenom > 0 && (map.scaledenom > layerclass.maxscaledenom))
{
continue;
}
if (layerclass.minscaledenom > 0 && (map.scaledenom <= layerclass.minscaledenom))
{
continue;
}
}
if (numClasses == 1)
{
// draw subclasses
xPos += xOffset;
if (phase == 1)
{
// drawing the first class item (same as the layer)
g.DrawImage(legendImage, xPos, yPos);
g.DrawString(legendText, legendFont,
Brushes.Black, xPos + 30, yPos + 2);
}
SizeF size = g.MeasureString(legendText, legendFont);
if (xPos + 30 + size.Width + 5 > width)
{
width = Convert.ToInt32(xPos + 30 + size.Width + 5);
}
yPos += yOffset;
}
++numClasses; // number of visible classes
// creating the treeicons
using (classObj def_class = new classObj(null)) // for drawing legend images
{
using (imageObj image = def_class.createLegendIcon(map, layer, 30, 20))
{
// drawing the class icons
layerclass.drawLegendIcon(map, layer, 20, 10, image, 5, 5);
byte[] img = image.getBytes();
using (MemoryStream ms = new MemoryStream(img))
{
legendImage = Image.FromStream(ms);
legendText = layerclass.name;
if (phase == 1)
{
g.DrawImage(legendImage, xPos, yPos);
}
if (numClasses > 1)
{
// draw the class item
if (phase == 1)
{
g.DrawString(layerclass.name, legendFont,
Brushes.Black, xPos + 30, yPos + 3);
}
SizeF size = g.MeasureString(layerclass.name, legendFont);
if (xPos + 30 + size.Width + 5 > width)
{
width = Convert.ToInt32(xPos + 30 + size.Width + 5);
}
}
else
{
// draw the layer item
if (phase == 1)
{
g.DrawString(layer.name, legendFont,
Brushes.Black, xPos + 30, yPos + 3);
}
SizeF size = g.MeasureString(layer.name, legendFont);
if (xPos + 30 + size.Width + 5 > width)
{
width = Convert.ToInt32(xPos + 30 + size.Width + 5);
}
if (string.Compare(layer.styleitem, "AUTO", true) == 0)
{
yPos += yOffset;
break;
}
}
}
}
}
yPos += yOffset;
}
if (numClasses > 1)
{
xPos -= xOffset;
}
}
}
height = yPos + 5;
}
g.Flush();
MemoryStream ms2 = new MemoryStream();
bmp.Save(ms2, System.Drawing.Imaging.ImageFormat.Png);
return(ms2.ToArray());
}
/// <summary>
/// Export a legend image with specific requirements (bug 1015)
/// </summary>
/// <param name="map">The map object</param>
/// <param name="width">The desired legend width</param>
/// <param name="height">The desired legend height</param>
/// <returns></returns>
public static byte[] ExportLegend(mapObj map)
{
int width = 10;
int height = 10;
Bitmap bmp = null;
Graphics g = null;
for (int phase = 0; phase < 2; phase++)
{
if (phase == 0)
bmp = new Bitmap(100, 100, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
else
bmp = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
g = Graphics.FromImage(bmp);
Stack groupPositions = new Stack(); // for storing the group text positions
Font legendFont = new Font("MS Sans Sherif", 8); // set default font
g.Clear(Color.White); // clear the background
int xPos = 5; // padding
int yPos = 5;
int xOffset = 24; // legend indent in pixels
int yOffset = 18; // item height in pixels
// force the recalculation of the current scale
map.setExtent(map.extent.minx, map.extent.miny, map.extent.maxx, map.extent.maxy);
// start drawing the legend in reverse layer order
using (intarray ar = map.getLayersDrawingOrder())
{
for (int i = map.numlayers - 1; i >= 0; i--)
{
layerObj layer = map.getLayer(ar.getitem(i));
if (layer.name == "__embed__scalebar" || layer.name == "__embed__legend"
|| layer.status == mapscript.MS_OFF || layer.name.StartsWith("~"))
continue;
if (map.scaledenom > 0)
{
if (layer.maxscaledenom > 0 && map.scaledenom > layer.maxscaledenom)
continue;
if (layer.minscaledenom > 0 && map.scaledenom <= layer.minscaledenom)
continue;
}
if (layer.maxscaledenom <= 0 && layer.minscaledenom <= 0)
{
if (layer.maxgeowidth > 0 && ((map.extent.maxx - map.extent.minx) > layer.maxgeowidth))
continue;
if (layer.mingeowidth > 0 && ((map.extent.maxx - map.extent.minx) < layer.mingeowidth))
continue;
}
// draw raster or WMS layers
if (layer.type == MS_LAYER_TYPE.MS_LAYER_RASTER)
{
if (phase == 1)
{
g.DrawIcon(global::MapLibrary.Properties.Resources.raster, xPos, yPos);
g.DrawString(layer.name, legendFont, Brushes.Black, xPos + 30, yPos + 2);
}
SizeF size = g.MeasureString(layer.name, legendFont);
if (xPos + 30 + size.Width + 5 > width)
width = Convert.ToInt32(xPos + 30 + size.Width + 5);
yPos += yOffset;
continue;
}
int numClasses = 0;
Image legendImage = null;
string legendText = null;
for (int j = 0; j < layer.numclasses; j++)
{
classObj layerclass = layer.getClass(j);
if (layerclass.name == "EntireSelection" || layerclass.name == "CurrentSelection")
continue;
if (layerclass.status == mapscript.MS_OFF)
continue;
if (map.scaledenom > 0)
{ /* verify class scale here */
if (layerclass.maxscaledenom > 0 && (map.scaledenom > layerclass.maxscaledenom))
continue;
if (layerclass.minscaledenom > 0 && (map.scaledenom <= layerclass.minscaledenom))
continue;
}
if (numClasses == 1)
{
// draw subclasses
xPos += xOffset;
if (phase == 1)
{
// drawing the first class item (same as the layer)
g.DrawImage(legendImage, xPos, yPos);
g.DrawString(legendText, legendFont,
Brushes.Black, xPos + 30, yPos + 2);
}
SizeF size = g.MeasureString(legendText, legendFont);
if (xPos + 30 + size.Width + 5 > width)
width = Convert.ToInt32(xPos + 30 + size.Width + 5);
yPos += yOffset;
}
++numClasses; // number of visible classes
// creating the treeicons
using (classObj def_class = new classObj(null)) // for drawing legend images
{
using (imageObj image = def_class.createLegendIcon(map, layer, 30, 20))
{
// drawing the class icons
layerclass.drawLegendIcon(map, layer, 20, 10, image, 5, 5);
byte[] img = image.getBytes();
using (MemoryStream ms = new MemoryStream(img))
{
legendImage = Image.FromStream(ms);
legendText = layerclass.name;
if (phase == 1)
g.DrawImage(legendImage, xPos, yPos);
if (numClasses > 1)
{
// draw the class item
if (phase == 1)
g.DrawString(layerclass.name, legendFont,
Brushes.Black, xPos + 30, yPos + 3);
SizeF size = g.MeasureString(layerclass.name, legendFont);
if (xPos + 30 + size.Width + 5 > width)
width = Convert.ToInt32(xPos + 30 + size.Width + 5);
}
else
{
// draw the layer item
if (phase == 1)
g.DrawString(layer.name, legendFont,
Brushes.Black, xPos + 30, yPos + 3);
SizeF size = g.MeasureString(layer.name, legendFont);
if (xPos + 30 + size.Width + 5 > width)
width = Convert.ToInt32(xPos + 30 + size.Width + 5);
if (string.Compare(layer.styleitem, "AUTO", true) == 0)
{
yPos += yOffset;
break;
}
}
}
}
}
yPos += yOffset;
}
if (numClasses > 1)
xPos -= xOffset;
}
}
height = yPos + 5;
}
g.Flush();
MemoryStream ms2 = new MemoryStream();
bmp.Save(ms2, System.Drawing.Imaging.ImageFormat.Png);
return ms2.ToArray();
}