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//
// ComboBoxBackend.cs
//
// Author:
// Lluis Sanchez <lluis@xamarin.com>
//
// Copyright (c) 2011 Xamarin Inc
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using Xwt.Backends;
using Gtk;
#if XWT_GTK3
using TreeModel = Gtk.ITreeModel;
#endif
namespace Xwt.GtkBackend
{
public class ComboBoxBackend: WidgetBackend, IComboBoxBackend, ICellRendererTarget
{
public ComboBoxBackend ()
{
}
public override void Initialize ()
{
//NeedsEventBox = false; // TODO: needs fix: no events with or without event box
Widget = (Gtk.ComboBox) CreateWidget ();
if (Widget.Cells.Length == 0) {
var cr = new Gtk.CellRendererText ();
Widget.PackStart (cr, false);
Widget.AddAttribute (cr, "text", 0);
}
Widget.Show ();
Widget.RowSeparatorFunc = IsRowSeparator;
}
protected virtual Gtk.Widget CreateWidget ()
{
return new Gtk.ComboBox ();
}
protected new Gtk.ComboBox Widget {
get { return (Gtk.ComboBox)base.Widget; }
set { base.Widget = value; }
}
protected new IComboBoxEventSink EventSink {
get { return (IComboBoxEventSink)base.EventSink; }
}
bool IsRowSeparator (TreeModel model, Gtk.TreeIter iter)
{
Gtk.TreePath path = model.GetPath (iter);
bool res = false;
ApplicationContext.InvokeUserCode (delegate {
res = EventSink.RowIsSeparator (path.Indices[0]);
});
return res;
}
public override void EnableEvent (object eventId)
{
base.EnableEvent (eventId);
if (eventId is ComboBoxEvent) {
if ((ComboBoxEvent)eventId == ComboBoxEvent.SelectionChanged)
Widget.Changed += HandleChanged;
}
}
public override void DisableEvent (object eventId)
{
base.DisableEvent (eventId);
if (eventId is ComboBoxEvent) {
if ((ComboBoxEvent)eventId == ComboBoxEvent.SelectionChanged)
Widget.Changed -= HandleChanged;
}
}
void HandleChanged (object sender, EventArgs e)
{
ApplicationContext.InvokeUserCode (EventSink.OnSelectionChanged);
}
#region IComboBoxBackend implementation
public void SetViews (CellViewCollection views)
{
Widget.Clear ();
foreach (var v in views)
CellUtil.CreateCellRenderer (ApplicationContext, Frontend, this, null, v);
}
public void SetSource (IListDataSource source, IBackend sourceBackend)
{
ListStoreBackend b = sourceBackend as ListStoreBackend;
if (b == null) {
CustomListModel model = new CustomListModel (source, Widget);
Widget.Model = model.Store;
} else
Widget.Model = b.Store;
}
public int SelectedRow {
get {
return Widget.Active;
}
set {
Widget.Active = value;
}
}
#endregion
#region ICellRendererTarget implementation
public void PackStart (object target, Gtk.CellRenderer cr, bool expand)
{
Widget.PackStart (cr, expand);
}
public void PackEnd (object target, Gtk.CellRenderer cr, bool expand)
{
Widget.PackEnd (cr, expand);
}
public void AddAttribute (object target, Gtk.CellRenderer cr, string field, int column)
{
Widget.AddAttribute (cr, field, column);
}
public void SetCellDataFunc (object target, Gtk.CellRenderer cr, Gtk.CellLayoutDataFunc dataFunc)
{
Widget.SetCellDataFunc (cr, dataFunc);
}
Rectangle ICellRendererTarget.GetCellBounds (object target, Gtk.CellRenderer cr, Gtk.TreeIter iter)
{
return new Rectangle ();
}
Rectangle ICellRendererTarget.GetCellBackgroundBounds (object target, Gtk.CellRenderer cr, Gtk.TreeIter iter)
{
return new Rectangle ();
}
public virtual void SetCurrentEventRow (string path)
{
}
Gtk.Widget ICellRendererTarget.EventRootWidget {
get { return Widget; }
}
TreeModel ICellRendererTarget.Model {
get { return Widget.Model; }
}
Gtk.TreeIter ICellRendererTarget.PressedIter { get; set; }
CellViewBackend ICellRendererTarget.PressedCell { get; set; }
public bool GetCellPosition (Gtk.CellRenderer r, int ex, int ey, out int cx, out int cy, out Gtk.TreeIter it)
{
cx = cy = 0;
it = Gtk.TreeIter.Zero;
return false;
}
public void QueueDraw (object target, Gtk.TreeIter iter)
{
}
public void QueueResize (object target, Gtk.TreeIter iter)
{
}
#endregion
}
}
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