/// <summary>
/// Write a directed graph to an image using SkiaSharp.
/// </summary>
/// <param name="graph">The directed graph.</param>
/// <param name="width">Desired width of the image.</param>
/// <param name="height">Desired height of the image.</param>
/// <returns></returns>
private Image WriteToImage(DirectedGraph graph, int width, int height)
{
using (SkiaContext context = new SkiaContext((int)width, (int)height))
{
DirectedGraphRenderer.Draw(context, graph);
return(context.Save());
}
}
/// <summary>The drawing canvas is being exposed to user.</summary>
private void OnDrawingAreaExpose(object sender, DrawnArgs args)
{
try
{
DrawingArea area = (DrawingArea)sender;
Cairo.Context context = args.Cr;
CairoContext drawingContext = new CairoContext(context, MainWidget);
DirectedGraphRenderer.Draw(drawingContext, arcs, nodes);
((IDisposable)context.GetTarget()).Dispose();
((IDisposable)context).Dispose();
}
catch (Exception err)
{
ShowError(err);
}
}
/// <summary>The drawing canvas is being exposed to user.</summary>
private void OnDrawingAreaExpose(object sender, DrawnArgs args)
{
try
{
DrawingArea area = (DrawingArea)sender;
Cairo.Context context = args.Cr;
DGObject.DefaultOutlineColour = area.StyleContext.GetColor(StateFlags.Normal).ToColour();
#pragma warning disable 0612
DGObject.DefaultBackgroundColour = area.StyleContext.GetBackgroundColor(StateFlags.Normal).ToColour();
#pragma warning restore 0612
CairoContext drawingContext = new CairoContext(context, MainWidget);
DirectedGraphRenderer.Draw(drawingContext, arcs, nodes);
((IDisposable)context.GetTarget()).Dispose();
((IDisposable)context).Dispose();
}
catch (Exception err)
{
ShowError(err);
}
}
