source: stable/HeuristicLab.ExtLibs/HeuristicLab.Netron/3.0.2672.12446/Netron.Diagramming.Core-3.0.2672.12446/Tools/EllipseTool.cs @ 13400

using System.Drawing;

namespace Netron.Diagramming.Core {
  /// <summary>
  /// Tool to draw an ellipse on the canvas
  /// <seealso cref="RectangleTool"/>
  /// </summary>
  public class EllipseTool : AbstractDrawingTool {
    #region Fields

    #endregion

    #region Properties

    #endregion

    #region Constructor
    public EllipseTool()
      : base("Ellipse Tool") {
    }
    public EllipseTool(string name)
      : base(name) {

    }
    #endregion

    #region Methods

    // ------------------------------------------------------------------
    /// <summary>
    /// Activates the tool - the cursor is set to the Cursors.DrawRectangle.
    /// </summary>
    // ------------------------------------------------------------------
    protected override void OnActivateTool() {
      base.OnActivateTool();
      Cursor = CursorPalette.DrawEllipse;
    }

    /// <summary>
    /// Handles the mouse move event.
    /// </summary>
    /// <param name="e">The <see cref="T:System.Windows.Forms.MouseEventArgs"/> instance containing the event data.</param>
    protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e) {
      base.OnMouseMove(e);
      if (IsActive && started) {
        Point point = new Point(e.X, e.Y);
        Controller.View.PaintGhostEllipse(startingPoint, point);
        Controller.View.Invalidate(System.Drawing.Rectangle.Inflate(Controller.View.Ghost.Rectangle, 20, 20));
      }
    }


    /// <summary>
    /// This method will be called when the user has finished drawing a ghost rectangle or bundle
    /// and initiates the actual creation of a bundle and the addition to the model via the appropriate command.
    /// </summary>
    protected override void GhostDrawingComplete() {
      if ((IsActive == false) ||
          (started == false)) {
        return;
      }

      try {
        SimpleEllipse shape = new SimpleEllipse(this.Controller.Model);
        shape.Width = (int)Rectangle.Width;
        shape.Height = (int)Rectangle.Height;
        AddShapeCommand cmd = new AddShapeCommand(
            this.Controller,
            shape,
            new Point((int)Rectangle.X, (int)Rectangle.Y));
        this.Controller.UndoManager.AddUndoCommand(cmd);
        cmd.Redo();
      }
      catch {
        base.Controller.DeactivateTool(this);
        Controller.View.Invalidate();
        throw;
      }

      //base.Controller.DeactivateTool(this);
    }


    #endregion
  }

}