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//
// BoxBackend.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 System.Linq;
using Xwt.Backends;
using Xwt;
using System.Collections.Generic;
namespace Xwt.GtkBackend
{
partial class BoxBackend: WidgetBackend, IBoxBackend
{
public BoxBackend ()
{
Widget = new CustomContainer () { Backend = this };
Widget.Show ();
}
new CustomContainer Widget {
get { return (CustomContainer)base.Widget; }
set { base.Widget = value; }
}
public void Add (IWidgetBackend widget)
{
WidgetBackend wb = (WidgetBackend) widget;
Widget.Add (wb.Frontend, GetWidget (widget));
}
public void Remove (IWidgetBackend widget)
{
Widget.Remove (GetWidget (widget));
}
public void SetAllocation (IWidgetBackend[] widgets, Rectangle[] rects)
{
bool changed = false;
for (int n=0; n<widgets.Length; n++) {
var w = GetWidget (widgets[n]);
if (Widget.SetAllocation (w, rects[n]))
changed = true;
}
if (changed)
Widget.QueueResizeIfRequired ();
}
}
partial class CustomContainer: Gtk.Container, IGtkContainer
{
public BoxBackend Backend;
public bool IsReallocating;
Dictionary<Gtk.Widget, WidgetData> children = new Dictionary<Gtk.Widget, WidgetData> ();
struct WidgetData
{
public Rectangle Rect;
public Widget Widget;
}
public CustomContainer ()
{
this.FixContainerLeak ();
this.SetHasWindow (false);
}
public void ReplaceChild (Gtk.Widget oldWidget, Gtk.Widget newWidget)
{
WidgetData r = children [oldWidget];
Remove (oldWidget);
Add (newWidget);
children [newWidget] = r;
}
public bool SetAllocation (Gtk.Widget w, Rectangle rect)
{
WidgetData r;
children.TryGetValue (w, out r);
if (r.Rect != rect) {
r.Rect = rect;
children [w] = r;
return true;
} else
return false;
}
public void Add (Widget w, Gtk.Widget gw)
{
children.Add (gw, new WidgetData () { Widget = w, Rect = new Rectangle (0,0,0,0) });
Add (gw);
}
protected override void OnAdded (Gtk.Widget widget)
{
widget.Parent = this;
}
protected override void OnRemoved (Gtk.Widget widget)
{
children.Remove (widget);
widget.Unparent ();
QueueResize ();
}
protected void OnReallocate ()
{
((IWidgetSurface)Backend.Frontend).Reallocate ();
}
protected Gtk.Requisition OnGetRequisition (SizeConstraint widthConstraint, SizeConstraint heightConstraint)
{
var size = Backend.Frontend.Surface.GetPreferredSize (widthConstraint, heightConstraint, true);
return size.ToGtkRequisition ();
}
protected override void OnSizeAllocated (Gdk.Rectangle allocation)
{
base.OnSizeAllocated (allocation);
try {
IsReallocating = true;
OnReallocate ();
} finally {
IsReallocating = false;
}
foreach (var cr in children.ToArray()) {
var r = cr.Value.Rect;
cr.Key.SizeAllocate (new Gdk.Rectangle (allocation.X + (int)r.X, allocation.Y + (int)r.Y, (int)r.Width, (int)r.Height));
}
}
protected override void ForAll (bool includeInternals, Gtk.Callback callback)
{
base.ForAll (includeInternals, callback);
foreach (var c in children.Keys.ToArray ())
callback (c);
}
}
}
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