Smrf.NodeXL.Visualization.Wpf.CollapsedGroupDrawingManager.SetDefaultAttributesOnCollapsedGroup C# (CSharp) Method

    SetDefaultAttributesOnCollapsedGroup()
    {
        Debug.Assert(m_oCollapsedGroup != null);
        Debug.Assert(m_oCollapsedGroupVertex != null);
        AssertValid();

        // Get the vertices that were collapsed into the collapsed group
        // vertex.

        ICollection<IVertex> oCollapsedVertices = m_oCollapsedGroup.Vertices;

        Debug.Assert(oCollapsedVertices != null);
        Debug.Assert(oCollapsedVertices.Count > 0);

        // Use the color and shape of the first vertex in the group.

        IVertex oFirstVertexToCollapse = oCollapsedVertices.First();

        Object oColor;

        // Note: Don't check the type of the color here, because it can be
        // either of two types.

        if ( oFirstVertexToCollapse.TryGetValue(
            ReservedMetadataKeys.PerColor, out oColor) )
        {
            m_oCollapsedGroupVertex.SetValue(ReservedMetadataKeys.PerColor,
                oColor);
        }

        Object oShape;

        if ( oFirstVertexToCollapse.TryGetValue(
            ReservedMetadataKeys.PerVertexShape, typeof(VertexShape),
            out oShape) )
        {
            m_oCollapsedGroupVertex.SetValue(
                ReservedMetadataKeys.PerVertexShape, (VertexShape)oShape);
        }

        // Use a size determined by the number of collapsed vertices.

        Single fRadius = (Single)Math.Min(
            8F + oCollapsedVertices.Count * 1F,
            VertexDrawer.MaximumRadius / 12.0F);

        m_oCollapsedGroupVertex.SetValue(ReservedMetadataKeys.PerVertexRadius,
            fRadius);

        // Add the group name as a label.

        String sLabel = m_oCollapsedGroup.Label;

        if ( !String.IsNullOrEmpty(sLabel) )
        {
            m_oCollapsedGroupVertex.SetValue(
                ReservedMetadataKeys.PerVertexLabel, sLabel);
        }
    }