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Viewing changes to external/xwt/Xwt.Gtk/Xwt.GtkBackend/CustomListModel.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/CustomListModel.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 CustomListModel: GLib.Object, Gtk.TreeModelImplementor
 
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        {
 
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                IListDataSource source;
 
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                Dictionary<int,int> nodeHash = new Dictionary<int,int> ();
 
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                Dictionary<int,int> handleHash = new Dictionary<int,int> ();
 
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                Type[] colTypes;
 
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                int counter = 1;
 
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                Gtk.TreeModelAdapter adapter;
 
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                Gtk.Widget parent;
 
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                public CustomListModel (IntPtr p): base (p)
 
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                {
 
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                }
 
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                public CustomListModel (IListDataSource source, Gtk.Widget w)
 
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                {
 
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                        parent = w;
 
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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.RowChanged += HandleRowChanged;
 
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                        source.RowDeleted += HandleRowDeleted;
 
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                        source.RowInserted += HandleRowInserted;
 
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                        source.RowsReordered += HandleRowsReordered;
 
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                }
 
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                void HandleRowsReordered (object sender, ListRowOrderEventArgs e)
 
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                {
 
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                        var p = new Gtk.TreePath (new int[] { e.Row });
 
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                        var it = IterFromNode (e.Row);
 
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                        adapter.EmitRowsReordered (p, it, e.ChildrenOrder);
 
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                        parent.QueueResize ();
 
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                }
 
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                void HandleRowInserted (object sender, ListRowEventArgs e)
 
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                {
 
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                        var p = new Gtk.TreePath (new int[] { e.Row });
 
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                        var it = IterFromNode (e.Row);
 
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                        adapter.EmitRowInserted (p, it);
 
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                        parent.QueueResize ();
 
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                }
 
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                void HandleRowDeleted (object sender, ListRowEventArgs e)
 
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                {
 
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                        var p = new Gtk.TreePath (new int[] { e.Row });
 
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                        adapter.EmitRowDeleted (p);
 
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                        parent.QueueResize ();
 
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                }
 
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                void HandleRowChanged (object sender, ListRowEventArgs e)
 
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                {
 
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                        var p = new Gtk.TreePath (new int[] { e.Row });
 
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                        var it = IterFromNode (e.Row);
 
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                        adapter.EmitRowChanged (p, it);
 
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                        parent.QueueResize ();
 
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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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                Gtk.TreeIter IterFromNode (int node)
 
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                {
 
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                        int gch;
 
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                        if (!handleHash.TryGetValue (node, out gch)) {
 
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                                gch = counter++;
 
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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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                int NodeFromIter (Gtk.TreeIter iter)
 
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                {
 
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                        int node;
 
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                        int gch = (int)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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                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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                        if (path.Indices.Length == 0)
 
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                                return false;
 
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                        int row = path.Indices [0];
 
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                        if (row >= source.RowCount) {
 
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                                return false;
 
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                        }
 
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                        iter = IterFromNode (row);
 
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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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                        int row = NodeFromIter (iter);
 
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                        return new Gtk.TreePath (new int[] { row });
 
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                }
 
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                public void GetValue (Gtk.TreeIter iter, int column, ref GLib.Value value)
 
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                {
 
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                        int row = NodeFromIter (iter);
 
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                        var v = source.GetValue (row, column);
 
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                        value = v != null ? new GLib.Value (v) : GLib.Value.Empty;
 
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                }
 
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                public bool IterNext (ref Gtk.TreeIter iter)
 
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                {
 
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                        int row = NodeFromIter (iter);
 
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                        if (++row < source.RowCount) {
 
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                                iter = IterFromNode (row);
 
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                                return true;
 
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                        } else
 
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                                return false;
 
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                }
 
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                public bool IterChildren (out Gtk.TreeIter iter, Gtk.TreeIter parent)
 
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        {
 
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            iter = Gtk.TreeIter.Zero;
 
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                        return false;
 
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                }
 
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                public bool IterHasChild (Gtk.TreeIter iter)
 
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                {
 
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                        return false;
 
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                }
 
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                public int IterNChildren (Gtk.TreeIter iter)
 
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                {
 
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                        if (iter.Equals (Gtk.TreeIter.Zero))
 
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                                return source.RowCount;
 
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                        else
 
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                                return 0;
 
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                }
 
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                public bool IterNthChild (out Gtk.TreeIter iter, Gtk.TreeIter parent, int n)
 
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                {
 
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                        if (parent.Equals (Gtk.TreeIter.Zero)) {
 
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                                iter = IterFromNode (n);
 
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                                return true;
 
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                        } else {
 
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                                iter = Gtk.TreeIter.Zero;
 
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                                return false;
 
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                        }
 
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                }
 
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                public bool IterParent (out Gtk.TreeIter iter, Gtk.TreeIter child)
 
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                {
 
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                        iter = Gtk.TreeIter.Zero;
 
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                        return false;
 
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                }
 
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                public void RefNode (Gtk.TreeIter iter)
 
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                {
 
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                }
 
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                public void UnrefNode (Gtk.TreeIter iter)
 
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                {
 
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                }
 
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                public Gtk.TreeModelFlags Flags {
 
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                        get {
 
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                                return Gtk.TreeModelFlags.ItersPersist | Gtk.TreeModelFlags.ListOnly;
 
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                        }
 
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                }
 
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                public int NColumns {
 
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                        get {
 
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                                return colTypes.Length;
 
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                        }
 
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                }
 
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                #endregion
 
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        }
 
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}
 
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