examples/canvas-view/canvas-view-example.cpp

   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
  18 #include <dali-toolkit/dali-toolkit.h>
  19 #include <dali-toolkit/devel-api/controls/canvas-view/canvas-view.h>
  20 #include <dali/devel-api/adaptor-framework/canvas-renderer-shape.h>
  21
  22 using namespace Dali;
  23
  24 /**
  25  * @brief This demonstrates how to display and control vector primitives using CanvasView.
  26  *
  27  * - It displays various types of shapes. Rectangle, circle, path, etc.
  28  * - Each shape can be set to fill color, stroke color, width, etc
  29  *   and can change the transfomation(rotate, scale, translate)
  30  */
  31 class CanvasViewController : public ConnectionTracker
  32 {
  33 public:
  34   /**
  35    * @brief Constructor.
  36    * @param[in]  application  A reference to the Application class
  37    */
  38   CanvasViewController(Application& application)
  39   : mApplication(application),
  40     mRoundedRect(),
  41     mArc(),
  42     mStar(),
  43     mTimer(),
  44     mCount(0)
  45   {
  46     // Connect to the Application's Init signal
  47     mApplication.InitSignal().Connect(this, &CanvasViewController::Create);
  48   }
  49
  50   ~CanvasViewController() = default;
  51
  52   void Create(Application& application)
  53   {
  54     // The Init signal is received once (only) during the Application lifetime
  55     Window  window     = application.GetWindow();
  56     Vector2 windowSize = window.GetSize();
  57     window.KeyEventSignal().Connect(this, &CanvasViewController::OnKeyEvent);
  58
  59     Toolkit::CanvasView mCanvasView = Toolkit::CanvasView::New(windowSize);
  60     mCanvasView.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
  61     mCanvasView.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
  62     mCanvasView.SetProperty(Actor::Property::SIZE, windowSize);
  63
  64     Dali::CanvasRenderer::Shape canvasBackground = Dali::CanvasRenderer::Shape::New();
  65     canvasBackground.AddRect(Rect<float>(0.0f, 0.0f, windowSize.width, windowSize.height), Vector2::ZERO);
  66     canvasBackground.SetFillColor(Vector4(1.0f, 1.0f, 1.0f, 1.0f));
  67     mCanvasView.AddDrawable(canvasBackground);
  68
  69     Dali::CanvasRenderer::Shape shape1 = Dali::CanvasRenderer::Shape::New();
  70     shape1.AddRect(Rect<float>(-50.0f, -50.0f, 100.0f, 100.0f), Vector2::ZERO);
  71     shape1.SetFillColor(Vector4(0.0f, 0.5f, 0.0f, 0.5f));
  72     shape1.SetStrokeColor(Vector4(0.5f, 0.0f, 0.0f, 0.5f));
  73     shape1.SetStrokeWidth(10.0f);
  74     shape1.Scale(1.2f);
  75     shape1.Rotate(Degree(45.0f));
  76     shape1.Translate(Vector2(100.0f, 100.0f));
  77
  78     mCanvasView.AddDrawable(shape1);
  79
  80     mRoundedRect = Dali::CanvasRenderer::Shape::New();
  81     mRoundedRect.AddRect(Rect<float>(10.0f, 350.0f, 200.0f, 140.0f), Vector2(40.0f, 40.0f));
  82     mRoundedRect.SetFillColor(Vector4(0.0f, 0.0f, 1.0f, 1.0f));
  83     mRoundedRect.SetOpacity(0.5f);
  84     mRoundedRect.SetStrokeColor(Vector4(1.0f, 1.0f, 0.0f, 1.0f));
  85     mRoundedRect.SetStrokeWidth(10.0f);
  86     mRoundedRect.SetStrokeJoin(Dali::CanvasRenderer::Shape::StrokeJoin::MITER);
  87     Dali::Vector<float> dashPattern;
  88     dashPattern.PushBack(15.0f);
  89     dashPattern.PushBack(30.0f);
  90     mRoundedRect.SetStrokeDash(dashPattern);
  91     mCanvasView.AddDrawable(mRoundedRect);
  92
  93     Dali::CanvasRenderer::Shape shape2 = Dali::CanvasRenderer::Shape::New();
  94     shape2.AddMoveTo(Vector2(535.0f, 135.0f));
  95     shape2.AddLineTo(Vector2(660.0f, 455.0f));
  96     shape2.AddLineTo(Vector2(355.0f, 250.0f));
  97     shape2.AddLineTo(Vector2(715.0f, 250.0f));
  98     shape2.AddLineTo(Vector2(410.0f, 455.0f));
  99     shape2.Close();
 100     shape2.SetFillRule(Dali::CanvasRenderer::Shape::FillRule::EVEN_ODD);
 101     shape2.SetFillColor(Vector4(1.0f, 0.0f, 0.0f, 1.0f));
 102     shape2.SetOpacity(0.5f);
 103     shape2.SetStrokeColor(Vector4(1.0f, 0.0f, 1.0f, 1.0f));
 104     shape2.SetStrokeWidth(20.0f);
 105     shape2.SetStrokeJoin(Dali::CanvasRenderer::Shape::StrokeJoin::ROUND);
 106     shape2.Transform(Matrix3(0.6f, 0.0f, 20.0f, 0.0f, 0.6f, -50.0f, 0.0f, 0.0f, 1.0f));
 107     mCanvasView.AddDrawable(shape2);
 108
 109     mArc = Dali::CanvasRenderer::Shape::New();
 110     mArc.AddArc(Vector2(100.0f, 650.0f), 80.0f, 10.0f, 0.0f, true);
 111     mArc.AddArc(Vector2(100.0f, 650.0f), 80.0f, 10.0f, 0.0f, true);
 112     mArc.SetOpacity(0.5f);
 113     mArc.SetStrokeColor(Vector4(0.0f, 1.0f, 0.0f, 1.0f));
 114     mArc.SetStrokeWidth(10.0f);
 115     mArc.SetStrokeCap(Dali::CanvasRenderer::Shape::StrokeCap::ROUND);
 116     mCanvasView.AddDrawable(mArc);
 117
 118     mStar = Dali::CanvasRenderer::Shape::New();
 119     mStar.AddMoveTo(Vector2(-1.0f, -165.0f));
 120     mStar.AddLineTo(Vector2(53.0f, -56.0f));
 121     mStar.AddLineTo(Vector2(174.0f, -39.0f));
 122     mStar.AddLineTo(Vector2(87.0f, 45.0f));
 123     mStar.AddLineTo(Vector2(107.0f, 166.0f));
 124     mStar.AddLineTo(Vector2(-1.0f, 110.0f));
 125     mStar.AddLineTo(Vector2(-103.0f, 166.0f));
 126     mStar.AddLineTo(Vector2(-88.0f, 46.0f));
 127     mStar.AddLineTo(Vector2(-174.0f, -38.0f));
 128     mStar.AddLineTo(Vector2(-54.0f, -56.0f));
 129
 130     mStar.Close();
 131
 132     mStar.SetFillColor(Vector4(0.0f, 1.0f, 1.0f, 1.0f));
 133     mStar.SetStrokeColor(Vector4(0.5f, 1.0f, 0.5f, 1.0f));
 134     mStar.SetStrokeWidth(30.0f);
 135     mStar.SetStrokeCap(Dali::CanvasRenderer::Shape::StrokeCap::ROUND);
 136     mStar.Scale(0.6f);
 137     mStar.Translate(Vector2(350.0f, 450.0f));
 138     mStar.SetOpacity(0.5f);
 139
 140     mCanvasView.AddDrawable(mStar);
 141
 142     mTimer = Timer::New(1000.0f / 32.0f);
 143     mTimer.TickSignal().Connect(this, &CanvasViewController::tick);
 144     mTimer.Start();
 145
 146     window.Add(mCanvasView);
 147   }
 148
 149   /**
 150    * @brief Called when set time.
 151    *
 152    * Change transformation every call to make it look like vector animation.
 153    */
 154   bool tick()
 155   {
 156     mRoundedRect.ResetPath();
 157     mRoundedRect.AddRect(Rect<float>(10.0f, 350.0f, 200.0f, 140.0f), Vector2(float(mCount % 80), float(mCount % 80)));
 158
 159     mArc.ResetPath();
 160     mArc.AddArc(Vector2(100.0f, 650.0f), 80.0f, 10.0f, float(mCount % 180), true);
 161     mArc.AddArc(Vector2(100.0f, 650.0f), 80.0f, 10.0f + float(mCount % 180), float(mCount % 180) / 2.0f, true);
 162
 163     mStar.Rotate(Degree(mCount * 2.0f));
 164     mStar.Scale(float(mCount % 100) * 0.01f + 0.6f);
 165     mCount++;
 166     return true;
 167   }
 168
 169   /**
 170    * @brief Called when any key event is received.
 171    *
 172    * Will use this to quit the application if Back or the Escape key is received
 173    * @param[in] event The key event information
 174    */
 175   void OnKeyEvent(const KeyEvent& event)
 176   {
 177     if(event.GetState() == KeyEvent::DOWN)
 178     {
 179       if(IsKey(event, Dali::DALI_KEY_ESCAPE) || IsKey(event, Dali::DALI_KEY_BACK))
 180       {
 181         mApplication.Quit();
 182       }
 183     }
 184   }
 185
 186 private:
 187   Application&                mApplication;
 188   Dali::CanvasRenderer::Shape mRoundedRect;
 189   Dali::CanvasRenderer::Shape mArc;
 190   Dali::CanvasRenderer::Shape mStar;
 191   Timer                       mTimer;
 192   int                         mCount;
 193 };
 194
 195 int DALI_EXPORT_API main(int argc, char** argv)
 196 {
 197   Application          application = Application::New(&argc, &argv);
 198   CanvasViewController test(application);
 199   application.MainLoop();
 200   return 0;
 201 }