plugins/dali-swig/examples/scroll-view.cs

   1 /*
   2  * Copyright (c) 2016 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
  18 using System;
  19 using System.Runtime.InteropServices;
  20 using Dali;
  21
  22 namespace MyCSharpExample
  23 {
  24     class Example
  25     {
  26         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  27         delegate void CallbackDelegate(IntPtr data);
  28
  29         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  30         delegate void ActorCallbackDelegate(IntPtr data);
  31
  32         private Dali.Application _application;
  33         private ScrollView _scrollView;
  34         private ScrollBar _scrollBar;
  35
  36         public Example(Dali.Application application)
  37         {
  38             _application = application;
  39             _application.Initialized += new Dali.AUIApplicationInitEventHandler(Initialize);
  40         }
  41
  42
  43         public void Initialize(object source, AUIApplicationInitEventArgs e)
  44         {
  45             CreateScrollView();
  46         }
  47
  48         private void CreateScrollView()
  49         {
  50             Stage stage = Stage.GetCurrent();
  51             stage.SetBackgroundColor(NDalic.WHITE);
  52
  53             // Create a scroll view
  54             _scrollView = new ScrollView();
  55             Vector2 stageSize = stage.GetSize();
  56             _scrollView.Size = new Vector3(stageSize.x, stageSize.y, 0.0f);
  57             _scrollView.ParentOrigin = NDalic.ParentOriginCenter;
  58             _scrollView.AnchorPoint = NDalic.AnchorPointCenter;
  59             stage.Add(_scrollView);
  60
  61             // Add actors to a scroll view with 3 pages
  62             int pageRows = 1;
  63             int pageColumns = 3;
  64             for(int pageRow = 0; pageRow < pageRows; pageRow++)
  65             {
  66                 for(int pageColumn = 0; pageColumn < pageColumns; pageColumn++)
  67                 {
  68                     View pageActor = new View();
  69                     pageActor.SetResizePolicy(ResizePolicyType.FILL_TO_PARENT, DimensionType.ALL_DIMENSIONS);
  70                     pageActor.ParentOrigin = NDalic.ParentOriginCenter;
  71                     pageActor.AnchorPoint = NDalic.AnchorPointCenter;
  72                     pageActor.Position = new Vector3(pageColumn * stageSize.x, pageRow * stageSize.y, 0.0f);
  73
  74                     // Add images in a 3x4 grid layout for each page
  75                     int imageRows = 4;
  76                     int imageColumns = 3;
  77                     float margin = 10.0f;
  78                     Vector3 imageSize = new Vector3((stageSize.x / imageColumns) - margin, (stageSize.y / imageRows) - margin, 0.0f);
  79
  80                     for(int row = 0; row < imageRows; row++)
  81                     {
  82                         for(int column = 0; column < imageColumns;column++)
  83                         {
  84                             int imageId = (row * imageColumns + column) % 2 + 1;
  85                             ImageView imageView = new ImageView("images/image-" + imageId + ".jpg");
  86                             imageView.ParentOrigin = NDalic.ParentOriginCenter;
  87                             imageView.AnchorPoint = NDalic.AnchorPointCenter;
  88                             imageView.Size = imageSize;
  89                             imageView.Position = new Vector3( margin * 0.5f + (imageSize.x + margin) * column - stageSize.x * 0.5f + imageSize.x * 0.5f,
  90                                                    margin * 0.5f + (imageSize.y + margin) * row - stageSize.y * 0.5f + imageSize.y * 0.5f, 0.0f );
  91                             pageActor.Add(imageView);
  92                         }
  93                     }
  94
  95                     _scrollView.Add(pageActor);
  96                 }
  97             }
  98
  99             _scrollView.SetAxisAutoLock(true);
 100
 101             // Set scroll view to have 3 pages in X axis and allow page snapping,
 102             // and also disable scrolling in Y axis.
 103             RulerPtr scrollRulerX = new RulerPtr(new FixedRuler(stageSize.width));
 104             RulerPtr scrollRulerY = new RulerPtr(new DefaultRuler());
 105             scrollRulerX.SetDomain(new RulerDomain(0.0f, stageSize.width * pageColumns, true));
 106             scrollRulerY.Disable();
 107             _scrollView.SetRulerX(scrollRulerX);
 108             _scrollView.SetRulerY(scrollRulerY);
 109
 110             // Create a horizontal scroll bar in the bottom of scroll view (which is optional)
 111             _scrollBar = new ScrollBar();
 112             _scrollBar.ParentOrigin = NDalic.ParentOriginBottomLeft;
 113             _scrollBar.AnchorPoint = NDalic.AnchorPointTopLeft;
 114             _scrollBar.SetResizePolicy(ResizePolicyType.FIT_TO_CHILDREN, DimensionType.WIDTH);
 115             _scrollBar.SetResizePolicy(ResizePolicyType.FILL_TO_PARENT, DimensionType.HEIGHT);
 116             _scrollBar.Orientation = new Quaternion( new Radian( new Degree( 270.0f ) ), Vector3.ZAXIS );
 117             _scrollBar.SetScrollDirection(ScrollBar.Direction.Horizontal);
 118             _scrollView.Add(_scrollBar);
 119
 120             // Connect to the OnRelayout signal
 121             _scrollView.OnRelayoutEvent += new Dali.View.OnRelayoutEventHandler(OnScrollViewRelayout);
 122         }
 123
 124         private void OnScrollViewRelayout(object source, View.OnRelayoutEventArgs e)
 125         {
 126           // Set the correct scroll bar size after size negotiation of scroll view is done
 127             _scrollBar.Size = new Vector3(0.0f, _scrollView.GetRelayoutSize(DimensionType.WIDTH), 0.0f);
 128         }
 129
 130         public void MainLoop()
 131         {
 132             _application.MainLoop ();
 133         }
 134
 135         /// <summary>
 136         /// The main entry point for the application.
 137         /// </summary>
 138         [STAThread]
 139         static void Main(string[] args)
 140         {
 141             Example example = new Example(Application.NewApplication());
 142             example.MainLoop ();
 143         }
 144     }
 145 }