TreeModelBase.cs :  » GUI » TreeViewAdv » Aga » Controls » Tree » C# / CSharp Open Source

using System;
using System.Collections.Generic;
using System.Text;

namespace Aga.Controls.Tree{
  public abstract class TreeModelBase: ITreeModel
  {
    public abstract System.Collections.IEnumerable GetChildren(TreePath treePath);
    public abstract bool IsLeaf(TreePath treePath);


    public event EventHandler<TreeModelEventArgs> NodesChanged;
    protected void OnNodesChanged(TreeModelEventArgs args)
    {
      if (NodesChanged != null)
        NodesChanged(this, args);
    }

    public event EventHandler<TreePathEventArgs> StructureChanged;
    protected void OnStructureChanged(TreePathEventArgs args)
    {
      if (StructureChanged != null)
        StructureChanged(this, args);
    }

    public event EventHandler<TreeModelEventArgs> NodesInserted;
    protected void OnNodesInserted(TreeModelEventArgs args)
    {
      if (NodesInserted != null)
        NodesInserted(this, args);
    }

    public event EventHandler<TreeModelEventArgs> NodesRemoved;
    protected void OnNodesRemoved(TreeModelEventArgs args)
    {
      if (NodesRemoved != null)
        NodesRemoved(this, args);
    }

    public virtual void Refresh()
    {
      OnStructureChanged(new TreePathEventArgs(TreePath.Empty));
    }
  }
}