using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Collections;
using System.Windows.Media.Effects;


namespace CanvasControl
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>

    public partial class Window1 : System.Windows.Window
    {

        public Window1()
        {
            InitializeComponent();
            Resources.Source = new Uri("pack://application:,,,/CanvasControl;component/ResourceSet.xaml");
            
            Content = MakeCanvas();
            Background = Brushes.Black;
            SizeToContent = SizeToContent.WidthAndHeight;
        }

        private Canvas MakeCanvas()
        {
            Canvas c=new Canvas();
            //You can extract the bounds of the individual elements, or operate with a fixed size here
            c.Width = 443;
            c.Height = 355;
            foreach (DictionaryEntry de in Resources)
            {
                DrawingBrush db = (de.Value as DrawingBrush);
                if (db != null)
                {
                    DrawingGroup dg = (db.Drawing as DrawingGroup);
                    if (dg != null)
                    {
                        GeometryDrawing gd = (dg.Children[0] as GeometryDrawing);
                        if (gd != null)
                        {
                            Path path = new Path();
                            path.Name = (string)de.Key;

                            //Directly assign the pertinent properties of interest
                            path.Data = gd.Geometry;
                            path.Stroke = gd.Pen.Brush;
                            path.StrokeThickness = gd.Pen.Thickness;
                            path.Fill = gd.Brush;

                            //On these Events we can modify our sweet vector content
                            path.MouseEnter += new MouseEventHandler(path_MouseEnter);
                            path.MouseLeave += new MouseEventHandler(path_MouseLeave);

                            
                            c.Children.Add(path);
                            c.Children.Add(CreateNameBlock(gd,path.Name));
                        }
                    }
                }
            }
            return c;
        }

        void path_MouseLeave(object sender, MouseEventArgs e)
        {
            Path p = sender as Path;
            p.BitmapEffect = null;
        }

        void path_MouseEnter(object sender, MouseEventArgs e)
        {
            Path p = sender as Path;
            p.BitmapEffect = new EmbossBitmapEffect();
        }

        private TextBlock CreateNameBlock(GeometryDrawing drawing, string name)
        {
            TextBlock tb = new TextBlock();
            tb.Text = name;
            tb.Background = Brushes.Transparent;
            tb.Foreground = Brushes.Black;
            
            
            //Make invisible to hittesting to allow the paths to receieve hit test events
            tb.IsHitTestVisible = false;

            //Canvas does not provide layout services - 
            //We need to measure the size of the textbox in order to align it horizontally and vertically ourselves
            tb.Measure(new Size(double.MaxValue, double.MaxValue));
            Size s = tb.DesiredSize;

            //The geometry bounds are available
            Rect bounds = drawing.Bounds;

            double posX = bounds.Left + bounds.Size.Width / 2 - s.Width / 2;
            double posY = bounds.Top + bounds.Size.Height / 2 - s.Height / 2;

            Canvas.SetLeft(tb, posX);
            Canvas.SetTop(tb, posY);

            return tb;

        }

    }
}