source: branches/2817-BinPackingSpeedup/HeuristicLab.ExtLibs/HeuristicLab.Netron/3.0.2672.12446/Netron.Diagramming.Core-3.0.2672.12446/Diagram elements/Shapes/ImageShape.cs

using System;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Reflection;
using System.Windows.Forms;

namespace Netron.Diagramming.Core {
  /// <summary>
  /// This shape allows you to use any picture as inside a rectangular area.
  /// </summary>  
  public partial class ImageShape : SimpleShapeBase {
    #region Fields

    // ------------------------------------------------------------------
    /// <summary>
    /// Implementation of IVersion - the current version of 
    /// ImageShape.
    /// </summary>
    // ------------------------------------------------------------------
    protected const double imageShapeVersion = 1.0;

    #region the connectors
    private Connector cBottom, cLeft, cRight, cTop;
    private string mImagePath;
    private Image mImage;
    #endregion
    #endregion

    #region Properties

    // ------------------------------------------------------------------
    /// <summary>
    /// Gets the current version.
    /// </summary>
    // ------------------------------------------------------------------
    public override double Version {
      get {
        return imageShapeVersion;
      }
    }

    /// <summary>
    /// Gets the friendly name of the entity to be displayed in the UI
    /// </summary>
    /// <value></value>
    public override string EntityName {
      get {
        return "Image shape";
      }
    }
    /// <summary>
    /// Gets or sets the image path.
    /// </summary>
    /// <value>The image path.</value>
    public string ImagePath {
      get { return mImagePath; }
      set {
        if (value == string.Empty) return;
        if (File.Exists(value)) {
          try {
            mImage = Image.FromFile(value);
            Transform(Rectangle.X, Rectangle.Y, mImage.Width, mImage.Height);
          }
          catch (Exception exc) {
            Trace.WriteLine(exc.Message);
          }
          mImagePath = value;
        } else
          MessageBox.Show("The specified file does not exist.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
      }
    }

    /// <summary>
    /// Gets or sets the image.
    /// </summary>
    /// <value>The image.</value>
    public Image Image {
      get { return mImage; }
      set {
        if (value == null) return;
        mImage = value;
        mImagePath = string.Empty;
        Transform(Rectangle.X, Rectangle.Y, mImage.Width, mImage.Height);
      }
    }
    #endregion

    #region Constructor

    /// <summary>
    /// Constructor
    /// </summary>
    public ImageShape()
      : base() {
    }
    /// <summary>
    /// This is the default constructor of the class.
    /// </summary>
    public ImageShape(IModel site)
      : base(site) {
    }

    #endregion

    #region Methods

    // -----------------------------------------------------------------
    /// <summary>
    /// Initializes this instance.
    /// </summary>
    // -----------------------------------------------------------------
    protected override void Initialize() {
      base.Initialize();
      //the initial size
      Transform(0, 0, 200, 50);
      #region Connectors
      cTop = new Connector(new Point((int)(Rectangle.Left + Rectangle.Width / 2), Rectangle.Top), Model);
      cTop.Name = "Top connector";
      cTop.Parent = this;
      Connectors.Add(cTop);

      cRight = new Connector(new Point(Rectangle.Right, (int)(Rectangle.Top + Rectangle.Height / 2)), Model);
      cRight.Name = "Right connector";
      cRight.Parent = this;
      Connectors.Add(cRight);

      cBottom = new Connector(new Point((int)(Rectangle.Left + Rectangle.Width / 2), Rectangle.Bottom), Model);
      cBottom.Name = "Bottom connector";
      cBottom.Parent = this;
      Connectors.Add(cBottom);

      cLeft = new Connector(new Point(Rectangle.Left, (int)(Rectangle.Top + Rectangle.Height / 2)), Model);
      cLeft.Name = "Left connector";
      cLeft.Parent = this;
      Connectors.Add(cLeft);
      #endregion
    }

    /// <summary>
    /// Adds additional stuff to the shape's menu
    /// </summary>
    /// <returns>ToolStripItem[]</returns>
    public override ToolStripItem[] Menu() {

      ToolStripMenuItem item = new ToolStripMenuItem(
          "Reset image size");

      item.Click += new EventHandler(OnResetImageSize);

      ToolStripItem[] items = new ToolStripItem[] { item };

      return items;
    }
    /// <summary>
    /// Resets the original image size
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void OnResetImageSize(object sender, EventArgs e) {
      Transform(Rectangle.X, Rectangle.Y, mImage.Width, mImage.Height);
      this.Invalidate();
    }

    /// <summary>
    /// Overrides the default bitmap used in the shape viewer
    /// </summary>
    /// <returns></returns>
    public Bitmap GetThumbnail() {
      Bitmap bmp = null;
      try {
        Stream stream = Assembly.GetExecutingAssembly().GetManifestResourceStream("Netron.GraphLib.BasicShapes.Resources.ImageShape.gif");

        bmp = Bitmap.FromStream(stream) as Bitmap;
        stream.Close();
        stream = null;
      }
      catch (Exception exc) {
        Trace.WriteLine(exc.Message, "ImageShape.GetThumbnail");
      }
      return bmp;
    }

    /// <summary>
    /// Paints the shape of the person object in the plex. Here you can let your imagination go.
    /// MAKE IT PERFORMANT, this is a killer method called 200.000 times a minute!
    /// </summary>
    /// <param name="g">The graphics canvas onto which to paint</param>
    public override void Paint(Graphics g) {
      base.Paint(g);
      //if(RecalculateSize)
      //{
      //    Rectangle = new RectangleF(new PointF(Rectangle.X,Rectangle.Y),
      //        g.MeasureString(this.Text,Font)); 
      //    Rectangle = System.Drawing.RectangleF.Inflate(Rectangle,10,10);
      //    RecalculateSize = false; //very important!
      //}
      if (mImage == null) {
        g.FillRectangle(Brush, Rectangle);
        StringFormat sf = new StringFormat();
        sf.Alignment = StringAlignment.Center;
        g.DrawString("Image shape", ArtPalette.DefaultFont, Brushes.Black, Rectangle.X + (Rectangle.Width / 2), Rectangle.Y + 3, sf);
      } else
        g.DrawImage(mImage, Rectangle);
    }
    #endregion
  }

}