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Viewing changes to external/xwt/Xwt.Gtk/Xwt.GtkBackend/TreeViewBackend.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/TreeViewBackend.cs
 
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// 
 
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// TreeViewBackend.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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namespace Xwt.GtkBackend
 
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{
 
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        public class TreeViewBackend: TableViewBackend, ITreeViewBackend
 
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        {
 
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                Gtk.TreePath autoExpandPath;
 
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                uint expandTimer;
 
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                protected override void OnSetDragTarget (Gtk.TargetEntry[] table, Gdk.DragAction actions)
 
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                {
 
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                        base.OnSetDragTarget (table, actions);
 
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                        Widget.EnableModelDragDest (table, actions);
 
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                }
 
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                protected override void OnSetDragSource (Gdk.ModifierType modifierType, Gtk.TargetEntry[] table, Gdk.DragAction actions)
 
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                {
 
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                        base.OnSetDragSource (modifierType, table, actions);
 
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                        Widget.EnableModelDragSource (modifierType, table, actions);
 
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                }
 
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                protected override void OnSetDragStatus (Gdk.DragContext context, int x, int y, uint time, Gdk.DragAction action)
 
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                {
 
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                        base.OnSetDragStatus (context, x, y, time, action);
 
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                        // We are overriding the TreeView methods for handling drag & drop, so we need
 
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                        // to manually highlight the selected row
 
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                        Gtk.TreeViewDropPosition tpos;
 
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                        Gtk.TreePath path;
 
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                        if (!Widget.GetDestRowAtPos (x, y, out path, out tpos))
 
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                                path = null;
 
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                        if (expandTimer == 0 || !object.Equals (autoExpandPath, path)) {
 
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                                if (expandTimer != 0)
 
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                                        GLib.Source.Remove (expandTimer);
 
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                                if (path != null) {
 
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                                        expandTimer = GLib.Timeout.Add (600, delegate {
 
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                                                Widget.ExpandRow (path, false);
 
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                                                return false;
 
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                                        });
 
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                                }
 
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                                autoExpandPath = path;
 
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                        }
 
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                        if (path != null && action != 0)
 
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                                Widget.SetDragDestRow (path, tpos);
 
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                        else
 
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                                Widget.SetDragDestRow (null, 0);
 
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                }
 
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                protected override void Dispose (bool disposing)
 
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                {
 
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                        if (expandTimer != 0)
 
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                                GLib.Source.Remove (expandTimer);
 
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                        base.Dispose (disposing);
 
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                }
 
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                public void SetSource (ITreeDataSource source, IBackend sourceBackend)
 
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                {
 
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                        TreeStoreBackend b = sourceBackend as TreeStoreBackend;
 
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                        if (b == null) {
 
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                                CustomTreeModel model = new CustomTreeModel (source);
 
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                                Widget.Model = model.Store;
 
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                        } else
 
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                                Widget.Model = b.Store;
 
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                }
 
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                public TreePosition[] SelectedRows {
 
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                        get {
 
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                                var rows = Widget.Selection.GetSelectedRows ();
 
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                                IterPos[] sel = new IterPos [rows.Length];
 
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                                for (int i = 0; i < rows.Length; i++) {
 
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                                        Gtk.TreeIter it;
 
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                                        Widget.Model.GetIter (out it, rows[i]);
 
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                                        sel[i] = new IterPos (-1, it);
 
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                                }
 
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                                return sel;
 
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                        }
 
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                }
 
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                public void SelectRow (TreePosition pos)
 
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                {
 
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                        Widget.Selection.SelectIter (((IterPos)pos).Iter);
 
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                }
 
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                public void UnselectRow (TreePosition pos)
 
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                {
 
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                        Widget.Selection.UnselectIter (((IterPos)pos).Iter);
 
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                }
 
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                public bool IsRowSelected (TreePosition pos)
 
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                {
 
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                        return Widget.Selection.IterIsSelected (((IterPos)pos).Iter);
 
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                }
 
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                public bool IsRowExpanded (TreePosition pos)
 
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                {
 
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                        return Widget.GetRowExpanded (Widget.Model.GetPath (((IterPos)pos).Iter));
 
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                }
 
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                public void ExpandRow (TreePosition pos, bool expandedChildren)
 
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                {
 
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                        Widget.ExpandRow (Widget.Model.GetPath (((IterPos)pos).Iter), expandedChildren);
 
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                }
 
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                public void CollapseRow (TreePosition pos)
 
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                {
 
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                        Widget.CollapseRow (Widget.Model.GetPath (((IterPos)pos).Iter));
 
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                }
 
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                public void ScrollToRow (TreePosition pos)
 
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                {
 
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                        Widget.ScrollToCell (Widget.Model.GetPath (((IterPos)pos).Iter), Widget.Columns[0], false, 0, 0);
 
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                }
 
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                public void ExpandToRow (TreePosition pos)
 
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                {
 
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                        Widget.ExpandToPath (Widget.Model.GetPath (((IterPos)pos).Iter));
 
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                }
 
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                public bool HeadersVisible {
 
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                        get {
 
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                                return Widget.HeadersVisible;
 
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                        }
 
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                        set {
 
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                                Widget.HeadersVisible = value;
 
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                        }
 
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                }
 
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                public bool GetDropTargetRow (double x, double y, out RowDropPosition pos, out TreePosition nodePosition)
 
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                {
 
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                        Gtk.TreeViewDropPosition tpos;
 
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                        Gtk.TreePath path;
 
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                        if (!Widget.GetDestRowAtPos ((int)x, (int)y, out path, out tpos)) {
 
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                                pos = RowDropPosition.Into;
 
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                                nodePosition = null;
 
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                                return false;
 
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                        }
 
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                        Gtk.TreeIter it;
 
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                        Widget.Model.GetIter (out it, path);
 
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                        nodePosition = new IterPos (-1, it);
 
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                        switch (tpos) {
 
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                        case Gtk.TreeViewDropPosition.After: pos = RowDropPosition.After; break;
 
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                        case Gtk.TreeViewDropPosition.Before: pos = RowDropPosition.Before; break;
 
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                        default: pos = RowDropPosition.Into; break;
 
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                        }
 
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                        return true;
 
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                }
 
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        }
 
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}
 
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