/// <summary>
/// Releases the unmanaged resources used by the <see cref="T:System.IO.Stream"/> and optionally releases the managed resources.
/// </summary>
/// <param name="disposing">true to release both managed and unmanaged resources; false to release only unmanaged resources.</param>
protected override void Dispose(bool disposing)
{
if (disposing)
{
_reader.Dispose();
}
base.Dispose(disposing);
}
private void btnRenderMap2_Click(object sender, EventArgs e)
{
//Note we're casting to mg-desktop specific subclasses as this is what mg-desktop rendering APIs expect
MgdMap map = (MgdMap)_viewer.GetMap();
MgdSelection selection = (MgdSelection)_viewer.GetSelection();
MgMapViewerProvider provider = _viewer.GetProvider();
MgdRenderingService renderSvc = (MgdRenderingService)provider.CreateService(MgServiceType.RenderingService);
MgPoint centerPt = map.ViewCenter;
MgCoordinate centerCoord = centerPt.Coordinate;
//MgdTransientMapState is a helper class which lets us apply transient state to a map, which is automatically
//undone on disposal. This is how we can render custom views of a map with specific display parameters without
//permanently changing the display parameters used by the map viewer
using (MgTransientMapState tempState = provider.CreateTransientState(map))
{
MgMapDisplayParameters state = new MgMapDisplayParameters(centerCoord.X, centerCoord.Y, 5000, 1024, 768, 96);
tempState.PushState(state);
MgByteReader br = renderSvc.RenderMap(map, selection, "PNG");
using (SaveFileDialog save = new SaveFileDialog())
{
save.Filter = "Portable Network Graphics (*.png)|*.png";
if (save.ShowDialog() == DialogResult.OK)
{
//MgReadOnlyStream is a stream adapter class that provides a .net stream
//interface to the MgByteReader, allowing MgByteReader objects to be used
//anywhere a System.IO.Stream is expected.
using (MgReadOnlyStream stream = new MgReadOnlyStream(br))
{
Image img = Image.FromStream(stream);
img.Save(save.FileName);
MessageBox.Show("Image saved to: " + save.FileName);
}
}
br.Dispose();
}
}
}
public override void Invoke()
{
var viewer = this.Viewer;
var sel = viewer.GetSelection();
var selLayers = sel.GetLayers();
if (selLayers == null)
{
MessageBox.Show(Strings.TextNoSelection);
return;
}
//This doesn't work :(
//
//var provider = viewer.GetProvider();
//var featSvc = (MgFeatureService)provider.CreateService(MgServiceType.FeatureService);
//var ext = sel.GetExtents(featSvc);
//var ll = ext.LowerLeftCoordinate;
//var ur = ext.UpperRightCoordinate;
//viewer.ZoomToExtents(ll.X, ll.Y, ur.X, ur.Y);
MgEnvelope env = new MgEnvelope();
if (_agfRw == null)
{
_agfRw = new MgAgfReaderWriter();
}
for (var i = 0; i < selLayers.GetCount(); i++)
{
var layer = selLayers.GetItem(i);
var fr = sel.GetSelectedFeatures(layer, layer.FeatureClassName, false);
try
{
string geomName = layer.GetFeatureGeometryName();
while (fr.ReadNext())
{
if (!fr.IsNull(geomName))
{
MgByteReader agf = null;
MgGeometry geom = null;
try
{
agf = fr.GetGeometry(geomName);
geom = _agfRw.Read(agf);
env.ExpandToInclude(geom.Envelope());
}
finally
{
if (agf != null)
{
agf.Dispose();
agf = null;
}
if (geom != null)
{
geom.Dispose();
geom = null;
}
}
}
}
}
finally
{
fr.Close();
}
}
var ll = env.LowerLeftCoordinate;
var ur = env.UpperRightCoordinate;
viewer.ZoomToExtents(ll.X, ll.Y, ur.X, ur.Y);
}
