internal void Compose()
{
GraphController controller = graphController as GraphController;
IGraphVisualHost visualHost = controller.GetVisualHost();
if (null == visualHost)
{
return; // Running in headless mode, draw no further.
}
VisualNode node = graphController.GetVisualNode(nodeId);
DrawingVisual bubbleVisual = visualHost.GetDrawingVisualForBubble(this.bubbleId);
DrawingContext drawingContext = bubbleVisual.RenderOpen();
if (content == null)
{
drawingContext.Close();
return;
}
anchorPoint.X = node.GetBubbleXPosition();
anchorPoint.Y = node.Height + Configurations.InfoBubbleTopMargin;
anchorPoint = new Point((int)anchorPoint.X, (int)anchorPoint.Y);
arrowLeft = new Point((int)(anchorPoint.X - Configurations.InfoBubbleArrowWidthHalf), (int)(anchorPoint.Y + Configurations.InfoBubbleArrowHeight));
arrowRight = new Point((int)(anchorPoint.X + Configurations.InfoBubbleArrowWidthHalf), (int)(anchorPoint.Y + Configurations.InfoBubbleArrowHeight));
if (this.previewType.HasFlag(PreviewTypes.Collapsed))
{
arrowLeft.Y = anchorPoint.Y;
anchorPoint.Y = arrowRight.Y;
arrowRight.Y = arrowLeft.Y;
}
else
{
arrowLeft.Offset(-1, 2);
arrowRight.Offset(1, 2);
}
if (this.previewType.HasFlag(PreviewTypes.String) ||
this.previewType.HasFlag(PreviewTypes.Unknown))
{
this.ComposeValue(drawingContext);
}
else if (this.previewType.HasFlag(PreviewTypes.Bitmap))
{
this.ComposeGeo(drawingContext);
}
drawingContext.Close();
TranslateTransform transform = bubbleVisual.Transform as TranslateTransform;
transform.X = node.X;
transform.Y = node.Y;
}
