test/NUITizenGallery/Examples/RefreshViewTest1/RefreshViewTest1.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 Tizen.NUI;
  19 using Tizen.NUI.BaseComponents;
  20 using Tizen.NUI.Components;
  21
  22 namespace NUITizenGallery
  23 {
  24     public partial class RefreshViewTest1Page : ContentPage
  25     {
  26         Random rand;
  27         bool clicked = false;
  28         TextLabel lbl1;
  29
  30         public RefreshViewTest1Page()
  31         {
  32             InitializeComponent();
  33
  34             lbl1 = new TextLabel
  35             {
  36                 Text = "It is Empty!"
  37             };
  38             Scroller.Add(lbl1);
  39
  40             btn1.Clicked += (s, e) =>
  41             {
  42                 if (!clicked)
  43                 {
  44                     rand = new Random();
  45                     int i = 0;
  46                     Scroller.Remove(lbl1);
  47                     for (i = 1; i <= 50; i++)
  48                     {
  49                         var label = new TextLabel(DateTime.UtcNow.AddMinutes(i).ToString("F"));
  50                         var r = new decimal(rand.NextDouble());
  51                         var g = new decimal(rand.NextDouble());
  52                         var b = new decimal(rand.NextDouble());
  53                         var boxview = new View
  54                         {
  55                             Size2D = new Size2D(NUIApplication.GetDefaultWindow().WindowSize.Width, 100),
  56                             BackgroundColor = new Tizen.NUI.Color((float)r, (float)g, (float)b, 1.0f)
  57                         };
  58                         Scroller.Add(label);
  59                         Scroller.Add(boxview);
  60                     }
  61                 }
  62                 else
  63                 {
  64                     View[] a = Scroller.Children.ToArray();
  65                     int i = 0;
  66                     for (i = 0; i < a.Length; i++)
  67                     {
  68                         Scroller.Remove(a[i]);
  69                     }
  70                     lbl1 = new TextLabel
  71                     {
  72                         Text = "It is Empty!"
  73                     };
  74                     Scroller.Add(lbl1);
  75                 }
  76                 clicked = !clicked;
  77             };
  78         }
  79
  80         protected override void Dispose(DisposeTypes type)
  81         {
  82             if (Disposed)
  83             {
  84                 return;
  85             }
  86
  87             if (type == DisposeTypes.Explicit)
  88             {
  89                 RemoveAllChildren(true);
  90             }
  91
  92             base.Dispose(type);
  93         }
  94
  95         private void RemoveAllChildren(bool dispose = false)
  96         {
  97             RecursiveRemoveChildren(this, dispose);
  98         }
  99
 100         private void RecursiveRemoveChildren(View parent, bool dispose)
 101         {
 102             if (parent == null)
 103             {
 104                 return;
 105             }
 106
 107             int maxChild = (int)parent.ChildCount;
 108             for (int i = maxChild - 1; i >= 0; --i)
 109             {
 110                 View child = parent.GetChildAt((uint)i);
 111                 if (child == null)
 112                 {
 113                     continue;
 114                 }
 115
 116                 RecursiveRemoveChildren(child, dispose);
 117                 parent.Remove(child);
 118                 if (dispose)
 119                 {
 120                     child.Dispose();
 121                 }
 122             }
 123         }
 124     }
 125 }
 126