/// <summary>
/// Draws the diagram using GDI+, centering and scaling within the specified bounds.
/// </summary>
/// <param name="graphics">GDI+ Graphics surface.</param>
/// <param name="bounds">Bounds in which to draw the diagram.</param>
public void Draw(GraphicsContext graphics, Rectangle bounds)
{
Point center = new Point(bounds.X + (bounds.Width / 2), bounds.Y + (bounds.Height / 2));
// determine the scaling factor
Rectangle logicalBounds = GetDiagramBounds();
double scale = 1;
if (logicalBounds.Width > logicalBounds.Height)
{
if (logicalBounds.Width != 0)
scale = (double)Math.Min(bounds.Width, bounds.Height) / (double)logicalBounds.Width;
}
else
{
if (logicalBounds.Height != 0)
scale = (double)Math.Min(bounds.Width, bounds.Height) / (double)logicalBounds.Height;
}
// draw all of the connectors first
foreach (Node node in mNodes)
{
Point source = ScalePoint(node.Location, scale);
// connectors
foreach (Node other in node.Connections)
{
Point destination = ScalePoint(other.Location, scale);
node.DrawConnector(graphics, new Point(center.X + source.X, center.Y + source.Y), new Point(center.X + destination.X, center.Y + destination.Y), other);
}
}
// then draw all of the nodes
foreach (Node node in mNodes)
{
Point destination = ScalePoint(node.Location, scale);
System.Windows.Size nodeSize = node.Size;
Rectangle nodeBounds = new Rectangle((int)(center.X + destination.X - (nodeSize.Width / 2)),
(int)(center.Y + destination.Y - (nodeSize.Height / 2)),
(int)nodeSize.Width,
(int)nodeSize.Height);
node.DrawNode(graphics, nodeBounds);
}
}
/// <summary> /// Draws the node using GDI+, within the specified bounds. /// </summary> /// <param name="graphics">GDI+ Graphics surface.</param> /// <param name="bounds">The bounds in which to draw the node.</param> public abstract void DrawNode(GraphicsContext graphics, Rectangle bounds);
/// <summary>
/// Draws the node using GDI+.
/// </summary>
/// <param name="graphics">GDI+ Graphics surface.</param>
/// <param name="bounds">The bounds in which to draw the node.</param>
public override void DrawNode(GraphicsContext graphics, Rectangle bounds)
{
graphics.PrimitiveBatch
}
/// <summary>
/// Draws a connector between this node and the specified child node using GDI+.
/// The source and destination coordinates (relative to the Graphics surface) are also specified.
/// </summary>
/// <param name="graphics">GDI+ Graphics surface.</param>
/// <param name="from">Source coodinate.</param>
/// <param name="to">Destination coordinate.</param>
/// <param name="other">The other node.</param>
public virtual void DrawConnector(GraphicsContext graphics, Microsoft.Xna.Framework.Point from, Microsoft.Xna.Framework.Point to, Node other)
{
graphics.PrimitiveBatch.AddVertex(new Vector2(from.X, from.Y), Color.White);
graphics.PrimitiveBatch.AddVertex(new Vector2(to.X, to.Y), Color.White);
}
