test/NUITizenGallery/Examples/CollectionViewTest/CollectionViewTest5Page.xaml.cs

   1 /*
   2  * Copyright(c) 2021 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17 using System;
  18 using System.Collections.ObjectModel;
  19 using System.ComponentModel;
  20 using Tizen.NUI;
  21 using Tizen.NUI.Binding;
  22 using Tizen.NUI.BaseComponents;
  23 using Tizen.NUI.Components;
  24 using Tizen.NUI.Components.Extension;
  25
  26 namespace NUITizenGallery
  27 {
  28     public partial class CollectionViewTest5Page : ContentPage
  29     {
  30         TestItem item10;
  31         ObservableCollection<TestItem> source;
  32         void OnSelect10Clicked(object sender, ClickedEventArgs e)
  33         {
  34             ColView.SelectedItem = item10;
  35         }
  36
  37         void OnSelectionChanged(object sender, SelectionChangedEventArgs e)
  38         {
  39             TestItem SelectedItem = null;
  40             string message;
  41             foreach(TestItem item in e.CurrentSelection)
  42             {
  43                 Console.WriteLine("Selected Item {0}", item?.GetHashCode());
  44                 SelectedItem = item;
  45             }
  46
  47             if (source == null)
  48             {
  49                 message = "Source is NULL";
  50             }
  51             else
  52             {
  53                 int index = source.IndexOf(SelectedItem);
  54                 message = index + " was Selected";
  55             }
  56
  57             var btn = new Button() { Text = "Ok", };
  58             btn.Clicked += (object s, ClickedEventArgs args) =>
  59             {
  60                 Navigator?.Pop();
  61             };
  62
  63             Console.WriteLine(message);
  64             DialogPage.ShowAlertDialog("Selected", message, btn);
  65         }
  66
  67         public CollectionViewTest5Page()
  68         {
  69             InitializeComponent();
  70             var MyModel = new TestSourceModel();
  71             item10 = MyModel.TestSource[10];
  72
  73             ColView.ItemsSource = source = MyModel.TestSource;
  74             ColView.ItemTemplate = new DataTemplate(() =>
  75             {
  76                 var item = new RecyclerViewItem()
  77                 {
  78                     HeightSpecification = LayoutParamPolicies.MatchParent,
  79                     WidthSpecification = 200,
  80                 };
  81                 item.SetBinding(View.BackgroundColorProperty, "BgColor");
  82                 var label = new TextLabel()
  83                 {
  84                     ParentOrigin = Tizen.NUI.ParentOrigin.Center,
  85                     PivotPoint = Tizen.NUI.PivotPoint.Center,
  86                     PositionUsesPivotPoint = true,
  87                 };
  88                 label.PixelSize = 30;
  89                 label.SetBinding(TextLabel.TextProperty, "Index");
  90                 item.Add(label);
  91
  92                 return item;
  93             });
  94         }
  95
  96         protected override void Dispose(DisposeTypes type)
  97         {
  98             if (Disposed)
  99             {
 100                 return;
 101             }
 102
 103             if (type == DisposeTypes.Explicit)
 104             {
 105                 RemoveAllChildren(true);
 106             }
 107
 108             base.Dispose(type);
 109         }
 110
 111         private void RemoveAllChildren(bool dispose = false)
 112         {
 113             RecursiveRemoveChildren(this, dispose);
 114         }
 115
 116         private void RecursiveRemoveChildren(View parent, bool dispose)
 117         {
 118             if (parent == null)
 119             {
 120                 return;
 121             }
 122
 123             int maxChild = (int)parent.ChildCount;
 124             for (int i = maxChild - 1; i >= 0; --i)
 125             {
 126                 View child = parent.GetChildAt((uint)i);
 127                 if (child == null)
 128                 {
 129                     continue;
 130                 }
 131
 132                 RecursiveRemoveChildren(child, dispose);
 133                 parent.Remove(child);
 134                 if (dispose)
 135                 {
 136                     child.Dispose();
 137                 }
 138             }
 139         }
 140     }
 141 }