using System.IO;
using System.Reflection;
using System.Windows.Forms;
namespace Netron.Diagramming.Core {
  /// <summary>
  /// Pallet of cursors
  /// <remarks>
  /// You can define your own cursors or change the existing ones by dropping a cursor file in the Resources directory
  /// and set the compile flag to 'embedded resource'.
  /// </remarks>
  /// </summary>
  public static class CursorPalette {
    #region Fields
    /// <summary>
    /// The root namespace.
    /// </summary>
    private const string NameSpace = "Netron.Diagramming.Core";


    static Cursor myDrawRectangle = GetCursor("DrawRectangle.cur");
    static Cursor myDrawEllipse = GetCursor("DrawEllipse.cur");
    static Cursor myPan = GetCursor("Pan.cur");

    /// <summary>
    /// the grip cursor
    /// </summary>
    private static Cursor mGrip = new Cursor(Assembly.GetExecutingAssembly().GetManifestResourceStream(NameSpace + ".Resources.Grip.cur"));
    /// <summary>
    /// the add cursor
    /// </summary>
    private static Cursor mAdd = new Cursor(Assembly.GetExecutingAssembly().GetManifestResourceStream(NameSpace + ".Resources.Add.cur"));
    /// <summary>
    /// the cross cursor
    /// </summary>
    private static Cursor mCross = new Cursor(Assembly.GetExecutingAssembly().GetManifestResourceStream(NameSpace + ".Resources.Cross.cur"));
    /// <summary>
    /// the move cursor
    /// </summary>
    private static Cursor mMove = new Cursor(Assembly.GetExecutingAssembly().GetManifestResourceStream(NameSpace + ".Resources.Move.cur"));
    /// <summary>
    /// the selection cursor
    /// </summary>
    private static Cursor mSelection = new Cursor(Assembly.GetExecutingAssembly().GetManifestResourceStream(NameSpace + ".Resources.Selection.cur"));
    /// <summary>
    /// the select cursor
    /// </summary>
    private static Cursor mSelect = new Cursor(Assembly.GetExecutingAssembly().GetManifestResourceStream(NameSpace + ".Resources.Select.cur"));
    /// <summary>
    /// the drop text cursor
    /// </summary>
    private static Cursor mDropText = new Cursor(Assembly.GetExecutingAssembly().GetManifestResourceStream(NameSpace + ".Resources.DropText.cur"));
    /// <summary>
    /// the drop shape cursor
    /// </summary>
    private static Cursor mDropShape = new Cursor(Assembly.GetExecutingAssembly().GetManifestResourceStream(NameSpace + ".Resources.DropShape.cur"));
    /// <summary>
    /// the drop image cursor
    /// </summary>
    private static Cursor mDropImage = new Cursor(Assembly.GetExecutingAssembly().GetManifestResourceStream(NameSpace + ".Resources.DropImage.cur"));


    #endregion

    #region Properties

    // ------------------------------------------------------------------
    /// <summary>
    /// Gets the cursor used when drawing a rectangle.
    /// </summary>
    // ------------------------------------------------------------------
    public static Cursor DrawRectangle {
      get {
        return myDrawRectangle;
      }
    }

    // ------------------------------------------------------------------
    /// <summary>
    /// Gets the cursor used when drawing an ellipse.
    /// </summary>
    // ------------------------------------------------------------------
    public static Cursor DrawEllipse {
      get {
        return myDrawEllipse;
      }
    }

    /// <summary>
    /// Gets the drop-image cursor to reflect the creation of a new image-shape by dragdrop onto the canvas.
    /// </summary>
    /// <value>The drop-image cursor.</value>
    public static Cursor DropImage {
      get {
        return mDropImage;
      }
    }
    /// <summary>
    /// Gets the drop-text cursor to reflect the creation of a new text-shape by dragdrop onto the canvas.
    /// </summary>
    /// <value>The drop-text cursor.</value>
    public static Cursor DropText {
      get {
        return mDropText;
      }
    }
    /// <summary>
    /// Gets the drop-shape cursor to reflect the creation of a new shape by dragdrop onto the canvas.
    /// </summary>
    /// <value>The drop-shape cursor.</value>
    public static Cursor DropShape {
      get {
        return mDropShape;
      }
    }
    /// <summary>
    /// Gets the grip cursor to reflect the creation of a (new) connection .
    /// </summary>
    /// <value>The grip.</value>
    public static Cursor Grip {
      get {
        return mGrip;
      }
    }
    /// <summary>
    /// Gets the add to reflect the creation of a (new) drawing shape.
    /// </summary>
    /// <value>The add.</value>
    public static Cursor Add {
      get {
        return mAdd;
      }
    }

    /// <summary>
    /// Gets the cross cursor.
    /// </summary>
    /// <value>The cross.</value>
    public static Cursor Cross {
      get {
        return mCross;
      }
    }

    /// <summary>
    /// Gets the move cursor to reflect the motion of a selection over the canvas.
    /// </summary>
    /// <value>The move.</value>
    public static Cursor Move {
      get {
        return mMove;
      }
    }

    /// <summary>
    /// Gets the pan cursor to reflect the action of panning canvas.
    /// </summary>
    /// <value>The move.</value>
    public static Cursor Pan {
      get {
        return myPan;
      }
    }

    /// <summary>
    /// Gets the selection cursor to reflect the process of selection shapes by dragging over the canvas.
    /// </summary>
    /// <value>The selection.</value>
    public static Cursor Selection {
      get {
        return mSelection;
      }
    }

    /// <summary>
    /// Gets the select cursor to reflect to motion and selection of a single connector (<see cref="ConnectorMoverTool"/>).
    /// </summary>
    /// <value>The select.</value>
    public static Cursor Select {
      get {
        return mSelect;
      }
    }
    #endregion

    #region Methods

    // ------------------------------------------------------------------
    /// <summary>
    /// Gets the image from the embedded resources for the specified 
    /// filename.
    /// </summary>
    /// <param name="filename">string: The filename from the embedded
    /// resources.</param>
    /// <returns>Image</returns>
    // ------------------------------------------------------------------
    static Cursor GetCursor(string filename) {
      return new Cursor(GetStream(filename));
    }

    // ------------------------------------------------------------------
    /// <summary>
    /// Returns a Stream from the manifest resources for the specified 
    /// filename.
    /// </summary>
    /// <param name="filename">string</param>
    /// <returns>Stream</returns>
    // ------------------------------------------------------------------
    public static Stream GetStream(string filename) {
      return Assembly.GetExecutingAssembly().GetManifestResourceStream(
          NameSpace +
          ".Resources." +
          filename);
    }


    #endregion

  }
}