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Viewing changes to external/xwt/Xwt.WPF/Xwt.WPFBackend/ListSourceNotifyWrapper.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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external/xwt/Xwt.WPF/Xwt.WPFBackend/ListSourceNotifyWrapper.cs
 
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// 
 
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// ListSourceNotifyWrapper.cs
 
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//  
 
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// Author:
 
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//       Eric Maupin <ermau@xamarin.com>
 
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// 
 
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// Copyright (c) 2012 Xamarin, Inc.
 
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// 
 
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// Permission is hereby granted, free of charge, to any person obtaining a copy
 
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// of this software and associated documentation files (the "Software"), to deal
 
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// in the Software without restriction, including without limitation the rights
 
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 
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// copies of the Software, and to permit persons to whom the Software is
 
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// furnished to do so, subject to the following conditions:
 
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// 
 
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// The above copyright notice and this permission notice shall be included in
 
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// all copies or substantial portions of the Software.
 
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// 
 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 
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// THE SOFTWARE.
 
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using System;
 
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using System.Collections;
 
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using System.Collections.Specialized;
 
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namespace Xwt.WPFBackend
 
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{
 
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        internal class ListSourceNotifyWrapper
 
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                : IEnumerable, INotifyCollectionChanged
 
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        {
 
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                public ListSourceNotifyWrapper (IListDataSource source)
 
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                {
 
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                        if (source == null)
 
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                                throw new ArgumentNullException ("source");
 
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                        this.source = source;
 
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                        this.source.RowInserted += OnRowsUpdated;
 
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                        this.source.RowChanged += OnRowsUpdated;
 
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                        this.source.RowsReordered += OnRowsUpdated;
 
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                        this.source.RowDeleted += OnRowsUpdated;
 
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                }
 
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                public event NotifyCollectionChangedEventHandler CollectionChanged;
 
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                public IEnumerator GetEnumerator ()
 
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                {
 
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                        int cols = this.source.ColumnTypes.Length;
 
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                        for (int i = 0; i < this.source.RowCount; ++i) {
 
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                                object[] row = new object[cols];
 
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                                for (int c = 0; c < row.Length; ++c)
 
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                                        row [c] = this.source.GetValue (i, c);
 
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                                yield return row;
 
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                        }
 
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                }
 
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                private readonly IListDataSource source;
 
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                private void OnRowsUpdated (object sender, ListRowEventArgs e)
 
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                {
 
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                        OnCollectionChanged (new NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction.Reset));
 
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                }
 
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                private void OnCollectionChanged (NotifyCollectionChangedEventArgs e)
 
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                {
 
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                        var changed = this.CollectionChanged;
 
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                        if (changed != null)
 
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                                changed (this, e);
 
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                }
 
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        }
 
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}
 
 
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