GridLineDecorator.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Markup;
using System.Windows.Media;
using System.Windows.Threading;

namespace ListViewWithLines
{
    [ContentProperty("Target")]
    public class GridLineDecorator : FrameworkElement
    {
        private ListView _target;
        private DrawingVisual _gridLinesVisual = new DrawingVisual();
        private GridViewHeaderRowPresenter _headerRowPresenter = null;

        public GridLineDecorator()
        {
            this.AddVisualChild(_gridLinesVisual);
            this.AddHandler(ScrollViewer.ScrollChangedEvent, new RoutedEventHandler(OnScrollChanged));
        }
        // 下载于www.51aspx.com
        #region GridLineBrush

        /// <summary>
        /// GridLineBrush Dependency Property
        /// </summary>
        public static readonly DependencyProperty GridLineBrushProperty =
            DependencyProperty.Register("GridLineBrush", typeof(Brush), typeof(GridLineDecorator),
                new FrameworkPropertyMetadata(Brushes.LightGray,
                    new PropertyChangedCallback(OnGridLineBrushChanged)));

        /// <summary>
        /// Gets or sets the GridLineBrush property.  This dependency property 
        /// indicates ....
        /// </summary>
        public Brush GridLineBrush
        {
            get { return (Brush)GetValue(GridLineBrushProperty); }
            set { SetValue(GridLineBrushProperty, value); }
        }

        /// <summary>
        /// Handles changes to the GridLineBrush property.
        /// </summary>
        private static void OnGridLineBrushChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            ((GridLineDecorator)d).OnGridLineBrushChanged(e);
        }

        /// <summary>
        /// Provides derived classes an opportunity to handle changes to the GridLineBrush property.
        /// </summary>
        protected virtual void OnGridLineBrushChanged(DependencyPropertyChangedEventArgs e)
        {
            DrawGridLines();
        }