private void ImageExportToFile()
{
GraphControl control = graphControl;
// check if the rectangular region or the whole viewport should be exported
bool useRect = (bool)handler.GetValue(OUTPUT, EXPORT_RECTANGLE);
RectD bounds = useRect ? exportRect.ToRectD() : control.Viewport;
// get the format
string formatChoice = (string)Handler.GetValue(OUTPUT, FORMAT);
string format = Formats[formatChoice];
// check whether decorations (selection, handles, ...) should be hidden
bool hide = (bool)handler.GetValue(OUTPUT, HIDE_DECORATIONS);
if (hide)
{
// if so, create a new graphcontrol whith the same graph
control = new GraphControl {
Graph = graphControl.Graph
};
}
IImageExporter exporter;
ContextConfigurator config = GetConfig(bounds, !useRect);
if (format.Equals("EMF"))
{
var transparentBackground = (bool)Handler.GetValue(EMF, TRANSPARENT);
// create the exporter
EmfImageExporter emfImageExporter = new EmfImageExporter(config);
if (!transparentBackground)
{
emfImageExporter.Background = new SolidBrush(graphControl.BackColor);
}
exporter = emfImageExporter;
saveFileDialog.Reset();
saveFileDialog.Filter = "EMF files (*.emf)|*.emf";
if (saveFileDialog.ShowDialog(this) == DialogResult.OK)
{
FileStream stream = new FileStream(saveFileDialog.FileName, FileMode.Create, FileAccess.Write);
exporter.Export(control, stream);
stream.Flush();
stream.Close();
}
}
else
{
// create the exporter
PixelImageExporter pixelImageExport = new PixelImageExporter(config);
AddExportParameters(pixelImageExport, format);
pixelImageExport.OutputFormat = format;
// check if the format is transparent PNG
var transparentBackground = (bool)Handler.GetValue(PNG, TRANSPARENT);
if ((!format.Equals("image/png") || !transparentBackground))
{
// if not, set the background color
pixelImageExport.Background = new SolidBrush(control.BackColor);
}
exporter = pixelImageExport;
saveFileDialog.Reset();
saveFileDialog.Filter = format + "|*." + format.Substring(6);
if (saveFileDialog.ShowDialog(this) == DialogResult.OK)
{
FileStream stream = new FileStream(saveFileDialog.FileName, FileMode.Create, FileAccess.Write);
try {
exporter.Export(control, stream);
} catch (IOException exception) {
MessageBox.Show(exception.Message, "I/O Error", MessageBoxButtons.OK);
} finally {
stream.Flush();
stream.Close();
}
}
}
}
private Image ImageExport()
{
GraphControl control = graphControl;
// check if the rectangular region or the whole viewport should be exported
bool useRect = (bool)handler.GetValue(OUTPUT, EXPORT_RECTANGLE);
RectD bounds = useRect ? exportRect.ToRectD() : control.Viewport;
// get the format
string formatChoice = (string)Handler.GetValue(OUTPUT, FORMAT);
string format = Formats[formatChoice];
// check whether decorations (selection, handles, ...) should be hidden
bool hide = (bool)handler.GetValue(OUTPUT, HIDE_DECORATIONS);
if (hide)
{
// if so, create a new graph control with the same graph
control = new GraphControl {
Graph = graphControl.Graph,
BackColor = graphControl.BackColor,
Projection = graphControl.Projection
};
}
IImageExporter exporter;
ContextConfigurator config = GetConfig(bounds, !useRect);
if (format.Equals("EMF"))
{
var transparentBackground = (bool)Handler.GetValue(EMF, TRANSPARENT);
// create the exporter
EmfImageExporter emfImageExporter = new EmfImageExporter(config);
if (!transparentBackground)
{
emfImageExporter.Background = new SolidBrush(graphControl.BackColor);
}
exporter = emfImageExporter;
var memoryStream = new MemoryStream();
exporter.Export(control, memoryStream);
// reset the stream
memoryStream.Position = 0;
// and read back the metafile for display
return(new Metafile(memoryStream));
}
else
{
// create the exporter
PixelImageExporter pixelImageExport = new PixelImageExporter(config);
AddExportParameters(pixelImageExport, format);
pixelImageExport.OutputFormat = format;
// check if the format is transparent PNG
var transparentBackground = (bool)Handler.GetValue(PNG, TRANSPARENT);
if ((!format.Equals("image/png") || !transparentBackground))
{
// if not, set the background color
pixelImageExport.Background = new SolidBrush(control.BackColor);
}
exporter = pixelImageExport;
var memoryStream = new MemoryStream();
try {
exporter.Export(control, memoryStream);
// reset the stream
memoryStream.Position = 0;
// and read back the image for display
return(new Bitmap(memoryStream));
} catch (IOException exception) {
MessageBox.Show(exception.Message, "I/O Error", MessageBoxButtons.OK);
return(null);
}
}
}
