source: trunk/sources/HeuristicLab.ExtLibs/HeuristicLab.Netron/3.0.2672.12446/Netron.Diagramming.Core-3.0.2672.12446/Tools/AlignTool.cs @ 3038

using System;
using System.Diagnostics;
using System.Collections;
using System.Drawing;
using System.Windows.Forms;

namespace Netron.Diagramming.Core
{
    // ----------------------------------------------------------------------
    /// <summary>
    /// Tool to align shapes in various ways
    /// </summary>
    // ----------------------------------------------------------------------
    public class AlignTool : AbstractTool
    {

        #region Fields

        // ------------------------------------------------------------------
        /// <summary>
        /// The type of alignment to apply.
        /// </summary>
        // ------------------------------------------------------------------
        private ShapeAlignment mAlignment;

        // ------------------------------------------------------------------
        /// <summary>
        /// Gets or sets the type of alignment to apply.
        /// </summary>
        // ------------------------------------------------------------------
        public ShapeAlignment Alignment
        {
            get { return mAlignment; }
            set { mAlignment = value; }
        }

  
        #endregion

        #region Constructor

        // ------------------------------------------------------------------
        /// <summary>
        /// Initializes a new instance of the <see cref="T:AlignTool"/> class.
        /// </summary>
        /// <param name="name">The name of the tool.</param>
        // ------------------------------------------------------------------
        public AlignTool(string name) : base(name)
        { 
        }
        #endregion

        #region Methods

        /// <summary>
        /// Called when the tool is activated.
        /// </summary>
        protected override void OnActivateTool()
        {
            bool valid = true;
            
            #region Validation of the selection
            
            //make sure we have the correct stuff on the table
            if (this.Controller.Model.Selection.SelectedItems == null || this.Controller.Model.Selection.SelectedItems.Count == 0)
            {
                MessageBox.Show("Nothing is selected, you need to select an existing group.", "Nothing selected.", MessageBoxButtons.OK, MessageBoxIcon.Hand);
                valid = false;                
            } else if (this.Controller.Model.Selection.SelectedItems.Count != 1)
            {
                MessageBox.Show("Multiple items are selected, select only one group.", "Multiple items", MessageBoxButtons.OK, MessageBoxIcon.Hand);
                valid = false;
            } else if (!(this.Controller.Model.Selection.SelectedItems[0] is IGroup))
            {
                MessageBox.Show("The selected item is not a group.", "Not a group.", MessageBoxButtons.OK, MessageBoxIcon.Hand);
                valid = false;
            }
            #endregion

            if (valid)
            {
                UngroupCommand cmd = new UngroupCommand(
                    this.Controller,
                   this.Controller.Model.Selection.SelectedItems[0] as IGroup);

                this.Controller.UndoManager.AddUndoCommand(cmd);
                cmd.Redo();
            }
             DeactivateTool();
             return;
        }

     
        #endregion

      
    }

}