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Viewing changes to external/xwt/Xwt.WPF/Xwt.WPFBackend/DropDownButton.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.WPF/Xwt.WPFBackend/DropDownButton.cs
 
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//
 
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// DropDownButton.cs
 
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//
 
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// Author:
 
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//       Eric Maupin <ermau@xamarin.com>
 
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//
 
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// Copyright (c) 2012 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 System.Windows;
 
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using System.Windows.Controls.Primitives;
 
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using SWC = System.Windows.Controls;
 
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namespace Xwt.WPFBackend
 
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{
 
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        public class DropDownButton
 
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                : SWC.Primitives.ToggleButton, IWpfWidget
 
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        {
 
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                public DropDownButton()
 
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                {
 
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                        Checked += OnChecked;
 
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                }
 
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                public event EventHandler<MenuOpeningEventArgs> MenuOpening;
 
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                public WidgetBackend Backend
 
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                {
 
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                        get;
 
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                        set;
 
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                }
 
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                protected override System.Windows.Size MeasureOverride (System.Windows.Size constraint)
 
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                {
 
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                        // HACK: This is a hack to fix a size calculation issue with buttons.
 
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                        // For some reason, base.MeasureOverride doesn't return the correct size
 
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                        // when using infinite,infinite as constraint, unless a previous call with
 
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                        // concrete numbers has been made.
 
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                        base.MeasureOverride (new System.Windows.Size (0, 0));
 
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                        var s = base.MeasureOverride (constraint);
 
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                        return Backend.MeasureOverride (constraint, s);
 
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                }
 
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                private void OnChecked (object sender, RoutedEventArgs routedEventArgs)
 
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                {
 
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                        if (!IsChecked.HasValue || !IsChecked.Value)
 
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                                return;
 
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                        var args = new MenuOpeningEventArgs ();
 
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                        var opening = this.MenuOpening;
 
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                        if (opening != null)
 
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                                opening (this, args);
 
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                        var menu = args.ContextMenu;
 
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                        if (menu == null) {
 
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                                IsChecked = false;
 
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                                return;
 
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                        }
 
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                        string text = Content as string;
 
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                        if (!String.IsNullOrWhiteSpace (text)) {
 
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                                SWC.MenuItem selected = menu.Items.OfType<SWC.MenuItem>().FirstOrDefault (i => i.Header as string == text);
 
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                                if (selected != null)
 
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                                        selected.IsChecked = true;
 
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                        }
 
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                        menu.Closed += OnMenuClosed;
 
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                        menu.PlacementTarget = this;
 
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                        menu.Placement = PlacementMode.Bottom;
 
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                        menu.IsOpen = true;
 
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                }
 
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                private void OnMenuClosed (object sender, RoutedEventArgs e)
 
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                {
 
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                        var menu = sender as SWC.ContextMenu;
 
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                        if (menu != null)
 
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                                menu.Closed -= OnMenuClosed;
 
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                        IsChecked = false;
 
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                }
 
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                public class MenuOpeningEventArgs
 
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                        : EventArgs
 
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                {
 
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                        public SWC.ContextMenu ContextMenu
 
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                        {
 
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                                get;
 
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                                set;
 
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                        }
 
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                }
 
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        }
 
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}
 
 
b'\\ No newline at end of file'