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Viewing changes to external/xwt/Xwt.Gtk/Xwt.GtkBackend/CustomTreeModel.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/CustomTreeModel.cs
 
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// 
 
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// CustomTreeModel.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 System.Collections.Generic;
 
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using System.Runtime.InteropServices;
 
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namespace Xwt.GtkBackend
 
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{
 
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        public class CustomTreeModel: Gtk.TreeModelImplementor
 
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        {
 
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                ITreeDataSource source;
 
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        Dictionary<GCHandle,TreePosition> nodeHash = new Dictionary<GCHandle,TreePosition> ();
 
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        Dictionary<TreePosition,GCHandle> handleHash = new Dictionary<TreePosition,GCHandle> ();
 
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                Type[] colTypes;
 
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                Gtk.TreeModelAdapter adapter;
 
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                public CustomTreeModel (ITreeDataSource source)
 
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                {
 
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                        this.source = source;
 
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                        adapter = new Gtk.TreeModelAdapter (this);
 
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                        colTypes = source.ColumnTypes;
 
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                        source.NodeChanged += HandleNodeChanged;
 
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                        source.NodeDeleted += HandleNodeDeleted;
 
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                        source.NodeInserted += HandleNodeInserted;
 
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                        source.NodesReordered += HandleNodesReordered;
 
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                }
 
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                public Gtk.TreeModelAdapter Store {
 
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                        get { return adapter; }
 
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                }
 
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                public IntPtr Handle {
 
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                        get {
 
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                                return IntPtr.Zero;
 
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                        }
 
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                }
 
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        Gtk.TreeIter IterFromNode (TreePosition node)
 
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                {
 
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                        GCHandle gch;
 
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                        if (!handleHash.TryGetValue (node, out gch)) {
 
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                                gch = GCHandle.Alloc (node);
 
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                                handleHash [node] = gch;
 
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                                nodeHash [gch] = node;
 
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                        }
 
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                        Gtk.TreeIter result = Gtk.TreeIter.Zero;
 
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                        result.UserData = (IntPtr)gch;
 
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                        return result;
 
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                }
 
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                TreePosition NodeFromIter (Gtk.TreeIter iter)
 
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                {
 
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                        TreePosition node;
 
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                        GCHandle gch = (GCHandle)iter.UserData;
 
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                        nodeHash.TryGetValue (gch, out node);
 
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                        return node;
 
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                }
 
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                #region TreeModelImplementor implementation
 
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                void HandleNodesReordered (object sender, TreeNodeOrderEventArgs e)
 
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                {
 
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                        Gtk.TreeIter it = IterFromNode (e.Node);
 
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                        adapter.EmitRowsReordered (GetPath (it), it, e.ChildrenOrder);
 
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                }
 
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                void HandleNodeInserted (object sender, TreeNodeEventArgs e)
 
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                {
 
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                        Gtk.TreeIter it = IterFromNode (e.Node);
 
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                        adapter.EmitRowInserted (GetPath (it), it);
 
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                }
 
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                void HandleNodeDeleted (object sender, TreeNodeChildEventArgs e)
 
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                {
 
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                        if (e.Node == null) {
 
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                                adapter.EmitRowDeleted (new Gtk.TreePath (new int[] { e.ChildIndex }));
 
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                        } else {
 
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                                Gtk.TreeIter it = IterFromNode (e.Node);
 
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                                var p = GetPath (it);
 
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                                int[] idx = new int [p.Indices.Length + 1];
 
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                                p.Indices.CopyTo (idx, 0);
 
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                                idx [idx.Length - 1] = e.ChildIndex;
 
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                                adapter.EmitRowDeleted (new Gtk.TreePath (idx));
 
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                        }
 
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                }
 
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                void HandleNodeChanged (object sender, TreeNodeEventArgs e)
 
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                {
 
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                        Gtk.TreeIter it = IterFromNode (e.Node);
 
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                        adapter.EmitRowChanged (GetPath (it), it);
 
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                }
 
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                public GLib.GType GetColumnType (int index)
 
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                {
 
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                        return (GLib.GType) colTypes [index];
 
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                }
 
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                public bool GetIter (out Gtk.TreeIter iter, Gtk.TreePath path)
 
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        {
 
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            iter = Gtk.TreeIter.Zero;
 
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                        TreePosition pos = null;
 
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                        int[] indices = path.Indices;
 
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                        if (indices.Length == 0)
 
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                                return false;
 
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                        for (int n=0; n<indices.Length; n++) {
 
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                                pos = source.GetChild (pos, indices [n]);
 
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                                if (pos == null)
 
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                                        return false;
 
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                        }
 
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                        iter = IterFromNode (pos);
 
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                        return true;
 
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                }
 
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                public Gtk.TreePath GetPath (Gtk.TreeIter iter)
 
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                {
 
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                        TreePosition pos = NodeFromIter (iter);
 
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                        List<int> idx = new List<int> ();
 
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                        while (pos != null) {
 
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                                var parent = source.GetParent (pos);
 
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                                idx.Add (GetIndex (parent, pos));
 
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                                pos = parent;
 
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                        }
 
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                        idx.Reverse ();
 
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                        return new Gtk.TreePath (idx.ToArray ());
 
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                }
 
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                int GetIndex (TreePosition parent, TreePosition pos)
 
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                {
 
153
                        int n = 0;
 
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                        do {
 
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                                var c = source.GetChild (parent, n);
 
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                                if (c == null)
 
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                                        return -1;
 
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                                if (c == pos || c.Equals(pos))
 
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                                        return n;
 
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                                n++;
 
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                        } while (true);
 
162
                }
 
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                public void GetValue (Gtk.TreeIter iter, int column, ref GLib.Value value)
 
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                {
 
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                        TreePosition pos = NodeFromIter (iter);
 
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                        var v = source.GetValue (pos, column);
 
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                        value = new GLib.Value (v);
 
169
                }
 
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171
                public bool IterNext (ref Gtk.TreeIter iter)
 
172
                {
 
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                        TreePosition pos = NodeFromIter (iter);
 
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                        TreePosition parent = source.GetParent (pos);
 
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                        int i = GetIndex (parent, pos);
 
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                        pos = source.GetChild (parent, i + 1);
 
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                        if (pos != null) {
 
178
                                iter = IterFromNode (pos);
 
179
                                return true;
 
180
                        } else
 
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                                return false;
 
182
                }
 
183
 
 
184
                public bool IterChildren (out Gtk.TreeIter iter, Gtk.TreeIter parent)
 
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        {
 
186
            iter = Gtk.TreeIter.Zero;
 
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                        TreePosition pos = NodeFromIter (parent);
 
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                        pos = source.GetChild (pos, 0);
 
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                        if (pos != null) {
 
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                                iter = IterFromNode (pos);
 
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                                return true;
 
192
                        } else
 
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                                return false;
 
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                }
 
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196
                public bool IterHasChild (Gtk.TreeIter iter)
 
197
                {
 
198
                        TreePosition pos = NodeFromIter (iter);
 
199
                        return source.GetChildrenCount (pos) != 0;
 
200
                }
 
201
 
 
202
                public int IterNChildren (Gtk.TreeIter iter)
 
203
                {
 
204
                        TreePosition pos = NodeFromIter (iter);
 
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                        return source.GetChildrenCount (pos);
 
206
                }
 
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208
                public bool IterNthChild (out Gtk.TreeIter iter, Gtk.TreeIter parent, int n)
 
209
        {
 
210
            iter = Gtk.TreeIter.Zero;
 
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                        TreePosition pos = NodeFromIter (parent);
 
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                        pos = source.GetChild (pos, n);
 
213
                        if (pos != null) {
 
214
                                iter = IterFromNode (pos);
 
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                                return true;
 
216
                        } else
 
217
                                return false;
 
218
                }
 
219
 
 
220
                public bool IterParent (out Gtk.TreeIter iter, Gtk.TreeIter child)
 
221
        {
 
222
            iter = Gtk.TreeIter.Zero;
 
223
                        TreePosition pos = NodeFromIter (iter);
 
224
                        pos = source.GetParent (pos);
 
225
                        if (pos != null) {
 
226
                                iter = IterFromNode (pos);
 
227
                                return true;
 
228
                        } else
 
229
                                return false;
 
230
                }
 
231
 
 
232
                public void RefNode (Gtk.TreeIter iter)
 
233
                {
 
234
                }
 
235
 
 
236
                public void UnrefNode (Gtk.TreeIter iter)
 
237
                {
 
238
                }
 
239
 
 
240
                public Gtk.TreeModelFlags Flags {
 
241
                        get {
 
242
                                return Gtk.TreeModelFlags.ItersPersist;
 
243
                        }
 
244
                }
 
245
 
 
246
                public int NColumns {
 
247
                        get {
 
248
                                return colTypes.Length;
 
249
                        }
 
250
                }
 
251
                #endregion
 
252
        }
 
253
}
 
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