test/NUITizenGallery/Examples/LinearLayoutTest/LinearLayoutTest4Page.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 Tizen.NUI;
  18 using Tizen.NUI.BaseComponents;
  19 using Tizen.NUI.Components;
  20
  21 namespace NUITizenGallery
  22 {
  23     public partial class LinearLayoutTest4Page : ContentPage
  24     {
  25         private int i = 0;
  26
  27         public LinearLayoutTest4Page()
  28         {
  29             InitializeComponent();
  30             addButton.Clicked += OnAddButtonClicked;
  31         }
  32
  33         private void OnAddButtonClicked(object sender, ClickedEventArgs e)
  34         {
  35             i++;
  36             layout.Add(new TextLabel
  37             {
  38                 Text = $"Label #{i}"
  39             });
  40         }
  41
  42         protected override void Dispose(DisposeTypes type)
  43         {
  44             if (Disposed)
  45             {
  46                 return;
  47             }
  48
  49             if (type == DisposeTypes.Explicit)
  50             {
  51                 addButton.Clicked -= OnAddButtonClicked;
  52                 RemoveAllChildren(true);
  53             }
  54
  55             base.Dispose(type);
  56         }
  57
  58         private void RemoveAllChildren(bool dispose = false)
  59         {
  60             RecursiveRemoveChildren(this, dispose);
  61         }
  62
  63         private void RecursiveRemoveChildren(View parent, bool dispose)
  64         {
  65             if (parent == null)
  66             {
  67                 return;
  68             }
  69
  70             int maxChild = (int)parent.ChildCount;
  71             for (int i = maxChild - 1; i >= 0; --i)
  72             {
  73                 View child = parent.GetChildAt((uint)i);
  74                 if (child == null)
  75                 {
  76                     continue;
  77                 }
  78
  79                 RecursiveRemoveChildren(child, dispose);
  80                 parent.Remove(child);
  81                 if (dispose)
  82                 {
  83                     child.Dispose();
  84                 }
  85             }
  86         }
  87     }
  88 }