Silverlight background tile-relatively simple implementation method

Because blend is not widely used, image tile is inevitable. I have previously written about how to use visualbrush to tile in WPF. However, there is no visualbrush in silverlihgt. You can only use the code to control the image tiled.

I found some implementation methods in Google, but it is always too complicated. The classic one is of course the tile method in the elite. silverlight3.pixelshaders project, which is too complex and does not support absolute tile. You need to specify the number of tiles on the X axis and the number of tiles on the Y axis. Even if the width is divided by the image width, it is a little troublesome. Later, we found a titlepanel inherited from panel. This is a simple implementation method, so we don't need to modify the previous code. Paste the code and examples.

/*Copyright (c) 2008, WiredPrairie.usAll rights reserved.Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer         in the documentation and/or other materials provided with the distribution.    * Neither the name of the <ORGANIZATION> nor the names of its contributors may be used to endorse or promote products derived         from this software without specific prior written permission.THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENTOF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHERIN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISEDOF THE POSSIBILITY OF SUCH DAMAGE.   */using System;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Ink;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;using System.Windows.Media.Imaging;using System.Diagnostics;namespace glPro.Common{    public class TilePanel : Panel    {        #region DependencyProperty setup        // Dependency properties for Tile Width, Height and Image        public static readonly DependencyProperty TileWidthProperty =            DependencyProperty.Register("TileWidth", typeof(double), typeof(TilePanel),                  new PropertyMetadata(double.NaN, new PropertyChangedCallback(TileWidthPropertyChanged)));        public static readonly DependencyProperty TileHeightProperty =            DependencyProperty.Register("TileHeight", typeof(double), typeof(TilePanel),                      new PropertyMetadata(double.NaN, new PropertyChangedCallback(TileHeightPropertyChanged)));        public static readonly DependencyProperty ImageProperty =            DependencyProperty.Register("Image", typeof(ImageBrush), typeof(TilePanel), new PropertyMetadata(null,                                                new PropertyChangedCallback(ImagePropertyChanged)));        public double TileWidth        {            get { return (double)GetValue(TileWidthProperty); }            set { SetValue(TileWidthProperty, value); }        }        public double TileHeight        {            get { return (double)GetValue(TileHeightProperty); }            set { SetValue(TileHeightProperty, value); }        }        public ImageBrush Image        {            get { return (ImageBrush)GetValue(ImageProperty); }            set { SetValue(ImageProperty, value); }        }        #endregion        private Size _lastFinalSize;        private ImageBrush _imgBrush;        private bool _needsUpdate = false;        public TilePanel()        {            this.SizeChanged += new SizeChangedEventHandler(TilePanelSizeChanged);        }        /// <summary>        /// Called when the size of the panel changes.        /// </summary>        /// <param name="sender">This panel</param>        /// <param name="e">The new size information</param>        protected virtual void TilePanelSizeChanged(object sender, SizeChangedEventArgs e)        {            if (e.NewSize != _lastFinalSize)            {                _lastFinalSize = e.NewSize;                // adjust the clipping rectangle based on the new size                RectangleGeometry rg = new RectangleGeometry();                rg.Rect = new Rect(new Point(), _lastFinalSize);                this.Clip = rg;                TileAdjustmentNeededAsync();            }                    }        /// <summary>        /// Signal that an adjustment to the tiles is needed,        /// then makes the call asynchronously.        /// By asynchronously making this call, it can help prevent        /// unnecessary work by the panel.        /// </summary>        protected void TileAdjustmentNeededAsync()        {            // by doing this sync, we can queue up several request            // but then really only handle the last one.            _needsUpdate = true;            // async call the adjust tiles            this.Dispatcher.BeginInvoke(delegate            {                AdjustTiles();            });        }                private static void TileHeightPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)        {            TilePanel tilePanel = d as TilePanel;            if (tilePanel != null)            {                Debug.WriteLine("TileHeight Changed: {0}", e.NewValue);                double val = (double)e.NewValue;                if ( val == double.NaN || val <= 0.0)                {                    throw new ArgumentOutOfRangeException("TileHeight");                }                tilePanel.TileAdjustmentNeededAsync();            }        }         private static void TileWidthPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)        {            TilePanel tilePanel = d as TilePanel;            if (tilePanel != null)            {                Debug.WriteLine("TileWidth Changed: {0}", e.NewValue);                double val = (double)e.NewValue;                if (val == double.NaN || val <= 0.0)                {                    throw new ArgumentOutOfRangeException("TileWidth");                }                tilePanel.TileAdjustmentNeededAsync();            }        }              private static void ImagePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)        {            // put code here to handle the property changed for Image            TilePanel tilePanel = d as TilePanel;            if (tilePanel != null )            {                Debug.WriteLine("ImagePropertyChanged");                tilePanel._imgBrush = e.NewValue as ImageBrush;                // remove all of the existing tiles as they no longer are valid                tilePanel.Children.Clear();                tilePanel.TileAdjustmentNeededAsync();            }        }         /// <summary>        /// Perform the standard Arrange. Here though, all of the tiles        /// are placed based on the tilesize specified.        /// </summary>        /// <param name="finalSize">the actual size that the panel has been given</param>        /// <returns>The size taken (which is always what it was given).</returns>        protected override Size ArrangeOverride(Size finalSize)        {            UIElementCollection children = Children;            double tw = TileWidth;            double th = TileHeight;            double x = 0, y = 0;            foreach (UIElement uie in Children)            {                if (x >= finalSize.Width)                {                    x = 0;                    y += th;                }                uie.Arrange(new Rect(x, y, tw, th));                x += tw;            }            return finalSize;        }        /// <summary>        /// Adjusts the quantity of the tiles based on the         /// size of the panel and immediately calls        /// UpdateLayout so the new tiles can be properly         /// layed out.        /// </summary>        protected virtual void AdjustTiles()        {            Debug.WriteLine("AdjustTiles - Update Needed: {0}", _needsUpdate);            // seems that it was already done ...            if (!_needsUpdate) { return; }            _needsUpdate = false;            // if no image brush is set ... all the children are cleared!            if (_imgBrush == null)             {                this.Children.Clear();                return ;             }            double tw = TileWidth;            double th = TileHeight;            // determine how many we actually need            int totalNeededX = (int) Math.Ceiling(this.ActualWidth / tw);            int totalNeededY = (int) Math.Ceiling(this.ActualHeight / th);            int totalNeeded = totalNeededX * totalNeededY;            // there may be too many             if (totalNeeded < this.Children.Count)            {                while (this.Children.Count > totalNeeded)                {                    this.Children.RemoveAt(this.Children.Count - 1);                                   }            }            // or too few ...            else if (this.Children.Count < totalNeeded)            {                while (this.Children.Count < totalNeeded)                {                    Rectangle r = new Rectangle();                    r.Width = tw;                    r.Height = th;                    r.Fill = _imgBrush;                    this.Children.Add(r);                                                        }            }            this.UpdateLayout();        }    }}

Reference this class on the xaml page: xmlns: Local = "CLR-namespace: glpro. Common"

<Grid> <local: tilepanel X: Name = "pnltile" tilewidth = "4" tileheight = "61"> <local: tilepanel. image> <imagebrush imagesource = "images/2-1 fl .png"/> </local: tilepanel. image> </local: tilepanel> </GRID>

Tilewidth indicates the image width and tileheight indicates the Image Height. Others are automatically calculated. That's simple. Paste the source code. Only then can we find that csdn cannot upload source code. Sorry! However, the code can be copied in the past.