GenieGraphPanel.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;

namespace SeciControls
{
    public class GenieGraphPanel : Panel
    {
        public GenieGraphPanel()
            : base()
        {
        }

        protected override System.Windows.Size MeasureOverride(System.Windows.Size availableSize)
        {
            foreach (UIElement child in InternalChildren)
            {
                child.Measure(availableSize);
            }
            return availableSize;
        }

        protected override System.Windows.Size ArrangeOverride(System.Windows.Size finalSize)
        {
            double geniesWidth = 0;
            double geniesHeight = 0;
            Boolean geniesVertical = false;
            Boolean graphTop = true;

            UIElementCollection children = InternalChildren;
            UIElement graph;
            UIElement genie1;
            UIElement genie2 = null;

            if (children[0].IsVisible)
            {
                //It has a visible graph
                graph = children[0];
                genie1 = children[1];
                if (children[2].IsVisible)
                {
                    genie2 = children[2];

                    if (2.0 * genie1.DesiredSize.Width > finalSize.Width)
                    {
                        geniesVertical = true;
                        geniesWidth = genie1.DesiredSize.Width;
                        geniesHeight = 2.0 * genie1.DesiredSize.Height;
                    }
                    else
                    {
                        geniesVertical = false;
                        geniesWidth = 2.0 * genie1.DesiredSize.Width;
                        geniesHeight = genie1.DesiredSize.Height;
                    }
                }
                else
                {
                    geniesVertical = false; //Does not really matter as there is only one genie
                    geniesWidth = genie1.DesiredSize.Width;
                    geniesHeight = genie1.DesiredSize.Height;
                }

                //Calculate where the most free space is
                double topHeight = finalSize.Height - geniesHeight;
                double topWidth = finalSize.Width;
                double topArea = topHeight * topWidth;

                double rightHeight = finalSize.Height;
                double rightWidth = finalSize.Width - geniesWidth;
                double rightArea = rightHeight * rightWidth;

                //if (rightArea > topArea)
                //{
                //    graphTop = false;
                //}


                if (finalSize.Width - geniesWidth > finalSize.Height - geniesHeight && rightHeight / rightWidth > topHeight / topWidth)
                {
                    //Move graph to rightside
                    graphTop = false;
                }

                if (graphTop)
                {
                    graph.Arrange(new Rect(0, 0, finalSize.Width, finalSize.Height - geniesHeight));
                    System.Windows.Controls.Primitives.UniformGrid temp = graph as System.Windows.Controls.Primitives.UniformGrid;
                    if (temp != null)
                    {
                        temp.Columns = temp.Children.Count;
                        temp.Rows = 1;
                    }
                    genie1.Arrange(new Rect(new Point(0, finalSize.Height - geniesHeight), genie1.DesiredSize));
                    if (genie2 != null)
                    {
                        if (geniesVertical)
                        {
                            genie2.Arrange(new Rect(new Point(0, finalSize.Height - geniesHeight + genie1.DesiredSize.Height), genie2.DesiredSize));
                        }
                        else
                        {
                            genie2.Arrange(new Rect(new Point(genie1.DesiredSize.Width, finalSize.Height - geniesHeight), genie2.DesiredSize));
                        }
                    }
                }
                else
                {
                    genie1.Arrange(new Rect(new Point(0, 0), genie1.DesiredSize));
                    if (genie2 != null)
                    {
                        genie2.Arrange(new Rect(new Point(0, genie1.DesiredSize.Height), genie2.DesiredSize));
                    }
                    graph.Arrange(new Rect(genie1.DesiredSize.Width, 0, finalSize.Width - genie1.DesiredSize.Width, finalSize.Height));
                    System.Windows.Controls.Primitives.UniformGrid temp = graph as System.Windows.Controls.Primitives.UniformGrid;
                    if (temp != null)
                    {
                        temp.Columns = 1;
                        temp.Rows = temp.Children.Count;
                    }
                }
            }
            else if (children[1].IsVisible)
            {
                //No graph so treat as a wrappanel
                genie1 = children[1];
                if (children[2].IsVisible)
                {
                    genie2 = children[2];
                }
                genie1.Arrange(new Rect(new Point(0, 0), genie1.DesiredSize));

                if (genie2 != null)
                {
                    if (2.0 * genie1.DesiredSize.Width > finalSize.Width)
                    {
                        genie2.Arrange(new Rect(new Point(0, genie1.DesiredSize.Height), genie2.DesiredSize));
                    }
                    else
                    {
                        genie2.Arrange(new Rect(new Point(genie1.DesiredSize.Width, 0), genie2.DesiredSize));
                    }
                }

            }

            return finalSize;
        }
    }
}