source: branches/HeuristicLab.Visualization/HeuristicLab.Visualization/3.3/Primitives/PrimitiveBase.cs @ 13045

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2015 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.Windows.Forms;

namespace HeuristicLab.Visualization {
  public abstract class PrimitiveBase : IPrimitive {
    private readonly IChart chart;
    public IChart Chart {
      get { return chart; }
    }

    private Pen pen;
    public virtual Pen Pen {
      get { return pen; }
      set {
        pen = value;
        OnRedrawRequired();
      }
    }
    private Brush brush;
    public virtual Brush Brush {
      get { return brush; }
      set {
        brush = value;
        OnRedrawRequired();
      }
    }

    public string ToolTipText { get; set; }

    public object Tag { get; set; }

    protected bool SuppressEvents { get; set; }

    private bool selected;
    public virtual bool Selected {
      get { return selected; }
      set {
        if (selected == value) return;
        selected = value;
        OnRedrawRequired();
      }
    }

    protected PrimitiveBase(IChart chart)
      : this(chart, Pens.Black, Brushes.White) {
    }
    protected PrimitiveBase(IChart chart, Pen pen, Brush brush) {
      this.chart = chart;
      this.pen = pen;
      this.brush = brush;
      selected = false;
      ToolTipText = null;
      Tag = null;
    }

    public abstract void Move(Offset delta);
    public abstract void Move(PointD point, Offset delta);

    public abstract void SnapToGrid(IGrid grid);
    public abstract void SnapToGrid(PointD point, IGrid grid);

    public abstract bool ContainsPoint(PointD point);

    public virtual Cursor GetCursor(PointD point) {
      return null;
    }

    public virtual string GetToolTipText(PointD point) {
      return ToolTipText;
    }

    public virtual void PreDraw(Graphics graphics) { }
    public virtual void Draw(Graphics graphics) { }
    public virtual void PostDraw(Graphics graphics) { }

    public event EventHandler RedrawRequired;
    protected virtual void OnRedrawRequired() {
      var handler = RedrawRequired;
      if (!SuppressEvents && handler != null) handler(this, EventArgs.Empty);
    }
  }
}