source: branches/1265_HeuristicLab.Visualization/HeuristicLab.Visualization/3.3/ChartModes/SelectChartMode.cs @ 17328

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
using HeuristicLab.Common.Resources;

namespace HeuristicLab.Visualization {
  public class SelectChartMode : ChartMode {
    public override Image Image { get { return VSImageLibrary.Pointer; } }
    public override string Text { get { return "&Select"; } }
    public override string ToolTipText { get { return "Select"; } }

    public SelectChartMode(ChartControl control) : base(control) {
      localShortcuts.Add(new Shortcut(Keys.Delete) { DownAction = DeleteSelectedPrimitives });
    }

    protected override void OnDeselected() {
      try {
        chartControl.SuspendRendering();
        foreach (var p in chartControl.Chart.Group.SelectedPrimitives)
          p.Selected = false;
      } finally {
        chartControl.ResumeRendering();
        base.OnDeselected();
      }
    }

    public override void HandleOnMouseDown(object sender, MouseEventArgs e) {
      try {
        switch (e.Button) {
          case MouseButtons.Left:
            try {
              chartControl.SuspendRendering();
              var sp = chartControl.Chart.GetPrimitive(e.Location);
              foreach (var p in chartControl.Chart.Group.SelectedPrimitives.Where(x => x != sp))
                p.Selected = false;
              if (sp != null) sp.Selected = true;
              OnSelectedPrimitivesChanged();
            } finally { chartControl.ResumeRendering(); }
            break;
        }
      } finally {
        base.HandleOnMouseDown(sender, e);
      }
    }

    public override void HandleOnMouseMove(object sender, MouseEventArgs e) {
      try {
        cursor = chartControl.Chart.GetCursor(e.Location);

        switch (e.Button) {
          case MouseButtons.Left:
            var previousWorldLocation = chartControl.Chart.TransformPixelToWorld(previousLocation);
            var worldLocation = chartControl.Chart.TransformPixelToWorld(e.Location);
            var offset = worldLocation - previousWorldLocation;
            try {
              chartControl.SuspendRendering();
              foreach (var p in chartControl.Chart.Group.SelectedPrimitives.Where(p => p.ContainsPoint(previousWorldLocation)))
                p.Move(previousWorldLocation, offset);
            } finally { chartControl.ResumeRendering(); }
            break;
        }
      } finally {
        chartControl.UpdatePicture();
        base.HandleOnMouseMove(sender, e);
      }
    }

    protected virtual void DeleteSelectedPrimitives() {
      try {
        chartControl.SuspendRendering();
        foreach (var p in chartControl.Chart.Group.SelectedPrimitives)
          chartControl.Chart.Group.Remove(p);
        OnSelectedPrimitivesChanged();
      } finally { chartControl.ResumeRendering(); }
    }

    public event EventHandler SelectedPrimitivesChanged;
    protected virtual void OnSelectedPrimitivesChanged() {
      var handler = SelectedPrimitivesChanged;
      if (handler != null) handler(this, EventArgs.Empty);
    }
  }
}