test/NUITizenGallery/Examples/CollectionViewTest/CollectionViewTest8.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 CollectionViewTest8 : ContentPage
  29     {
  30         public CollectionViewTest8()
  31         {
  32             InitializeComponent();
  33             BindingContext = new TestSourceModel(40);
  34
  35             var customStyle = new RecyclerViewItemStyle()
  36             {
  37                 BackgroundColor = new Selector<Color>()
  38                 {
  39                     Normal = Color.White,
  40                     Pressed = Color.Red,
  41                     Selected = Color.Blue,
  42                     Disabled = Color.Grey,
  43                 },
  44             };
  45
  46             ColView.ItemTemplate = new DataTemplate(() =>
  47             {
  48                 var item = new RecyclerViewItem(customStyle)
  49                 {
  50                     WidthSpecification = 100,
  51                     HeightSpecification = LayoutParamPolicies.MatchParent,
  52                 };
  53                 var label = new TextLabel()
  54                 {
  55                     ParentOrigin = Tizen.NUI.ParentOrigin.Center,
  56                     PivotPoint = Tizen.NUI.PivotPoint.Center,
  57                     PositionUsesPivotPoint = true,
  58                 };
  59                 label.PixelSize = 30;
  60                 label.SetBinding(TextLabel.TextProperty, "Index");
  61                 item.Add(label);
  62
  63                 return item;
  64             });
  65         }
  66
  67         protected override void Dispose(DisposeTypes type)
  68         {
  69             if (Disposed)
  70             {
  71                 return;
  72             }
  73
  74             if (type == DisposeTypes.Explicit)
  75             {
  76                 RemoveAllChildren(true);
  77             }
  78
  79             base.Dispose(type);
  80         }
  81
  82         private void RemoveAllChildren(bool dispose = false)
  83         {
  84             RecursiveRemoveChildren(this, dispose);
  85         }
  86
  87         private void RecursiveRemoveChildren(View parent, bool dispose)
  88         {
  89             if (parent == null)
  90             {
  91                 return;
  92             }
  93
  94             int maxChild = (int)parent.ChildCount;
  95             for (int i = maxChild - 1; i >= 0; --i)
  96             {
  97                 View child = parent.GetChildAt((uint)i);
  98                 if (child == null)
  99                 {
 100                     continue;
 101                 }
 102
 103                 RecursiveRemoveChildren(child, dispose);
 104                 parent.Remove(child);
 105                 if (dispose)
 106                 {
 107                     child.Dispose();
 108                 }
 109             }
 110         }
 111     }
 112 }