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Viewing changes to external/xwt/Xwt.Gtk/Xwt.GtkBackend/TreeStoreBackend.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.Gtk/Xwt.GtkBackend/TreeStoreBackend.cs
 
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// 
 
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// TreeStoreBackend.cs
 
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//  
 
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// Author:
 
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//       Lluis Sanchez <lluis@xamarin.com>
 
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// 
 
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// Copyright (c) 2011 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 Xwt.Backends;
 
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using Xwt.Drawing;
 
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using Xwt.Engine;
 
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namespace Xwt.GtkBackend
 
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{
 
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        class IterPos: TreePosition
 
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        {
 
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                public IterPos ()
 
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                {
 
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                }
 
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                public IterPos (int treeVersion, Gtk.TreeIter iter)
 
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                {
 
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                        this.Iter = iter;
 
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                        this.Version = treeVersion;
 
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                }
 
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                public Gtk.TreeIter Iter;
 
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                public Gtk.TreeIter LastChildIter;
 
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                public int LastChildIndex = -1;
 
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                public int ChildrenCount = -1;
 
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                public int Version;
 
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        }
 
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        public class TreeStoreBackend: TableStoreBackend, ITreeStoreBackend
 
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        {
 
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                Type[] columnTypes;
 
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                int version;
 
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                public Gtk.TreeStore Tree {
 
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                        get { return (Gtk.TreeStore) Store; }
 
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                }
 
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                public override Gtk.TreeModel InitializeModel (Type[] columnTypes)
 
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                {
 
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                        this.columnTypes = columnTypes;
 
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                        return new Gtk.TreeStore (columnTypes);
 
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                }
 
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                public event EventHandler<TreeNodeEventArgs> NodeInserted;
 
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                public event EventHandler<TreeNodeChildEventArgs> NodeDeleted;
 
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                public event EventHandler<TreeNodeEventArgs> NodeChanged;
 
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                public event EventHandler<TreeNodeOrderEventArgs> NodesReordered;
 
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                IterPos GetIterPos (TreePosition pos)
 
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                {
 
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                        IterPos tpos = (IterPos) pos;
 
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                        if (tpos != null && tpos.Version != version) {
 
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                                tpos.LastChildIndex = -1;
 
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                                tpos.ChildrenCount = -1;
 
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                        }
 
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                        return tpos;
 
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                }
 
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                public void Clear ()
 
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                {
 
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                        version++;
 
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                        Tree.Clear ();
 
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                }
 
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                public TreePosition GetChild (TreePosition pos, int index)
 
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                {
 
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                        IterPos tpos = GetIterPos (pos);
 
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                        if (tpos != null && tpos.LastChildIndex == index)
 
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                                return new IterPos (version, tpos.LastChildIter);
 
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                        if (index == 0) {
 
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                                if (tpos != null) {
 
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                                        Gtk.TreeIter it;
 
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                                        if (Tree.IterChildren (out it, tpos.Iter)) {
 
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                                                tpos.LastChildIter = it;
 
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                                                tpos.LastChildIndex = 0;
 
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                                                return new IterPos (version, it);
 
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                                        }
 
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                                } else {
 
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                                        Gtk.TreeIter it;
 
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                                        if (Tree.GetIterFirst (out it))
 
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                                                return new IterPos (version, it);
 
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                                }
 
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                                return null;
 
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                        }
 
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                        if (tpos == null) {
 
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                                Gtk.TreeIter it;
 
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                                if (Tree.IterNthChild (out it, index))
 
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                                        return new IterPos (version, it);
 
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                                else
 
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                                        return null;
 
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                        }
 
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                        if (tpos.LastChildIndex == -1 || tpos.LastChildIndex > index) {
 
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                                Gtk.TreeIter it;
 
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                                if (Tree.IterNthChild (out it, tpos.Iter, index)) {
 
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                                        tpos.LastChildIter = it;
 
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                                        tpos.LastChildIndex = index;
 
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                                        return new IterPos (version, it);
 
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                                } else
 
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                                        return null;
 
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                        }
 
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                        // tpos.LastChildIndex < index
 
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                        Gtk.TreeIter iter = tpos.LastChildIter;
 
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                        for (int n = tpos.LastChildIndex; n < index; n++) {
 
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                                if (!Tree.IterNext (ref iter))
 
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                                        return null;
 
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                        }
 
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                        tpos.LastChildIter = iter;
 
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                        tpos.LastChildIndex = index;
 
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                        return new IterPos (version, iter);
 
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                }
 
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                public int GetChildrenCount (TreePosition pos)
 
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                {
 
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                        if (pos == null)
 
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                                return Tree.IterNChildren ();
 
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                        IterPos tpos = GetIterPos (pos);
 
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                        if (tpos.ChildrenCount != -1)
 
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                                return tpos.ChildrenCount;
 
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                        return tpos.ChildrenCount = Tree.IterNChildren (tpos.Iter);
 
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                }
 
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                public void SetValue (TreePosition pos, int column, object value)
 
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                {
 
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                        IterPos tpos = GetIterPos (pos);
 
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                        SetValue (tpos.Iter, column, value);
 
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                }
 
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                public object GetValue (TreePosition pos, int column)
 
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                {
 
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                        IterPos tpos = GetIterPos (pos);
 
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                        return GetValue (tpos.Iter, column);
 
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                }
 
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                public TreePosition InsertBefore (TreePosition pos)
 
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                {
 
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                        version++;
 
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                        IterPos tpos = GetIterPos (pos);
 
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                        var p = Tree.InsertNodeBefore (tpos.Iter);
 
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                        return new IterPos (version, p);
 
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                }
 
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                public TreePosition InsertAfter (TreePosition pos)
 
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                {
 
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                        version++;
 
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                        IterPos tpos = GetIterPos (pos);
 
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                        var p = Tree.InsertNodeAfter (tpos.Iter);
 
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                        return new IterPos (version, p);
 
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                }
 
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                public TreePosition AddChild (TreePosition pos)
 
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                {
 
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                        version++;
 
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                        IterPos tpos = GetIterPos (pos);
 
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                        Gtk.TreeIter it;
 
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                        if (pos == null)
 
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                                it = Tree.AppendNode ();
 
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                        else
 
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                                it = Tree.AppendNode (tpos.Iter);
 
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                        return new IterPos (version, it);
 
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                }
 
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                public void Remove (TreePosition pos)
 
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                {
 
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                        version++;
 
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                        IterPos tpos = GetIterPos (pos);
 
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                        Gtk.TreeIter it = tpos.Iter;
 
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                        Tree.Remove (ref it);
 
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                }
 
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                public TreePosition GetNext (TreePosition pos)
 
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                {
 
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                        IterPos tpos = GetIterPos (pos);
 
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                        Gtk.TreeIter it = tpos.Iter;
 
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                        if (!Tree.IterNext (ref it))
 
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                                return null;
 
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                        return new IterPos (version, it);
 
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                }
 
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                public TreePosition GetPrevious (TreePosition pos)
 
211
                {
 
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                        throw new NotImplementedException ();
 
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                }
 
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                public TreePosition GetParent (TreePosition pos)
 
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                {
 
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                        IterPos tpos = GetIterPos (pos);
 
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                        Gtk.TreeIter it;
 
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                        if (!Tree.IterParent (out it, tpos.Iter))
 
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                                return null;
 
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                        return new IterPos (version, it);
 
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                }
 
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                public Type[] ColumnTypes {
 
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                        get {
 
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                                return columnTypes;
 
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                        }
 
228
                }
 
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                public void EnableEvent (object eventId)
 
231
                {
 
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                }
 
233
                
 
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                public void DisableEvent (object eventId)
 
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                {
 
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                }
 
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        }
 
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}
 
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