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

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

namespace Aga.Controls.Tree{
  internal class FixedRowHeightLayout : IRowLayout
  {
    private TreeViewAdv _treeView;

    public FixedRowHeightLayout(TreeViewAdv treeView, int rowHeight)
    {
      _treeView = treeView;
      PreferredRowHeight = rowHeight;
    }

    private int _rowHeight;
    public int PreferredRowHeight
    {
      get { return _rowHeight; }
      set { _rowHeight = value; }
    }

    public Rectangle GetRowBounds(int rowNo)
    {
      return new Rectangle(0, rowNo * _rowHeight, 0, _rowHeight);
    }

    public int PageRowCount
    {
      get
      {
        return Math.Max((_treeView.DisplayRectangle.Height - _treeView.ColumnHeaderHeight) / _rowHeight, 0);
      }
    }

    public int CurrentPageSize
    {
      get
      {
        return PageRowCount;
      }
    }

    public int GetRowAt(Point point)
    {
      point = new Point(point.X, point.Y + (_treeView.FirstVisibleRow * _rowHeight) - _treeView.ColumnHeaderHeight);
      return point.Y / _rowHeight;
    }

    public int GetFirstRow(int lastPageRow)
    {
      return Math.Max(0, lastPageRow - PageRowCount + 1);
    }

    public void ClearCache()
    {
    }
  }
}