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Viewing changes to external/xwt/Xwt.Gtk/Xwt.GtkBackend/BoxBackend.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/BoxBackend.cs
 
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// 
 
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// BoxBackend.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.Linq;
 
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using Xwt.Backends;
 
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using Xwt;
 
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using System.Collections.Generic;
 
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namespace Xwt.GtkBackend
 
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{
 
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        class BoxBackend: WidgetBackend, IBoxBackend
 
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        {
 
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                public BoxBackend ()
 
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                {
 
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                        Widget = new CustomContainer () { Backend = this };
 
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                        Widget.Show ();
 
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                }
 
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                new CustomContainer Widget {
 
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                        get { return (CustomContainer)base.Widget; }
 
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                        set { base.Widget = value; }
 
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                }
 
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                public void Add (IWidgetBackend widget)
 
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                {
 
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                        WidgetBackend wb = (WidgetBackend) widget;
 
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                        Widget.Add (wb.Frontend, GetWidget (widget));
 
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                }
 
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                public void Remove (IWidgetBackend widget)
 
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                {
 
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                        Widget.Remove (GetWidget (widget));
 
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                }
 
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                public void SetAllocation (IWidgetBackend[] widgets, Rectangle[] rects)
 
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                {
 
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                        bool changed = false;
 
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                        for (int n=0; n<widgets.Length; n++) {
 
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                                var w = GetWidget (widgets[n]);
 
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                                if (Widget.SetAllocation (w, rects[n]))
 
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                                        changed = true;
 
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                        }
 
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                        if (changed && !Widget.IsReallocating)
 
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                                Widget.QueueResize ();
 
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                }
 
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        }
 
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        class CustomContainer: Gtk.Container, IGtkContainer
 
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        {
 
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                public BoxBackend Backend;
 
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                public bool IsReallocating;
 
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                Dictionary<Gtk.Widget, WidgetData> children = new Dictionary<Gtk.Widget, WidgetData> ();
 
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                struct WidgetData
 
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                {
 
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                        public Rectangle Rect;
 
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                        public Widget Widget;
 
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                }
 
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                public CustomContainer ()
 
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                {
 
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                        GtkWorkarounds.FixContainerLeak (this);
 
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                        WidgetFlags |= Gtk.WidgetFlags.NoWindow;
 
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                }
 
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                public void ReplaceChild (Gtk.Widget oldWidget, Gtk.Widget newWidget)
 
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                {
 
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                        WidgetData r = children [oldWidget];
 
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                        Remove (oldWidget);
 
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                        Add (newWidget);
 
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                        children [newWidget] = r;
 
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                }
 
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                public bool SetAllocation (Gtk.Widget w, Rectangle rect)
 
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                {
 
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                        WidgetData r;
 
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                        children.TryGetValue (w, out r);
 
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                        if (r.Rect != rect) {
 
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                                r.Rect = rect;
 
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                                children [w] = r;
 
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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 void Add (Widget w, Gtk.Widget gw)
 
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                {
 
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                        children.Add (gw, new WidgetData () { Widget = w, Rect = new Rectangle (0,0,0,0) });
 
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                        Add (gw);
 
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                }
 
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                protected override void OnAdded (Gtk.Widget widget)
 
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                {
 
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                        widget.Parent = this;
 
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                }
 
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                protected override void OnRemoved (Gtk.Widget widget)
 
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                {
 
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                        children.Remove (widget);
 
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                        widget.Unparent ();
 
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                        QueueResize ();
 
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                }
 
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                protected override void OnUnrealized ()
 
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                {
 
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                        base.OnUnrealized ();
 
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                }
 
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                protected override void OnSizeAllocated (Gdk.Rectangle allocation)
 
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                {
 
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                        base.OnSizeAllocated (allocation);
 
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                        if (Backend.IsPreallocating)
 
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                                return;
 
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                        try {
 
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                                IsReallocating = true;
 
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                                ((IWidgetSurface)Backend.Frontend).Reallocate ();
 
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                        } catch {
 
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                                IsReallocating = false;
 
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                        }
 
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                        foreach (var cr in children) {
 
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                                var r = cr.Value.Rect;
 
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                                cr.Key.SizeAllocate (new Gdk.Rectangle (allocation.X + (int)r.X, allocation.Y + (int)r.Y, (int)r.Width, (int)r.Height));
 
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                        }
 
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                }
 
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                protected override void ForAll (bool includeInternals, Gtk.Callback callback)
 
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                {
 
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                        base.ForAll (includeInternals, callback);
 
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                        foreach (var c in children.Keys.ToArray ())
 
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                                callback (c);
 
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                }
 
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        }
 
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}
 
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