examples/bubble-effect/bubble-effect-example.cpp

   1 /*
   2  * Copyright (c) 2020 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/dali.h>
  19 #include <dali-toolkit/dali-toolkit.h>
  20 #include <dali-toolkit/devel-api/controls/bubble-effect/bubble-emitter.h>
  21 #include "shared/view.h"
  22 #include "shared/utility.h"
  23
  24 using namespace Dali;
  25
  26 namespace
  27 {
  28 const char * const TOOLBAR_IMAGE( DEMO_IMAGE_DIR "top-bar.png" );
  29 const char * const APPLICATION_TITLE( "Bubble Effect" );
  30 const char * const CHANGE_BACKGROUND_ICON( DEMO_IMAGE_DIR "icon-change.png" );
  31 const char * const CHANGE_BACKGROUND_ICON_SELECTED( DEMO_IMAGE_DIR "icon-change-selected.png" );
  32 const char * const CHANGE_BUBBLE_SHAPE_ICON( DEMO_IMAGE_DIR "icon-replace.png" );
  33 const char * const CHANGE_BUBBLE_SHAPE_ICON_SELECTED( DEMO_IMAGE_DIR "icon-replace-selected.png" );
  34
  35 const char* BACKGROUND_IMAGES[]=
  36 {
  37   DEMO_IMAGE_DIR "background-1.jpg",
  38   DEMO_IMAGE_DIR "background-2.jpg",
  39   DEMO_IMAGE_DIR "background-3.jpg",
  40   DEMO_IMAGE_DIR "background-4.jpg",
  41   DEMO_IMAGE_DIR "background-5.jpg",
  42 };
  43 const unsigned int NUM_BACKGROUND_IMAGES( sizeof( BACKGROUND_IMAGES ) / sizeof( BACKGROUND_IMAGES[0] ) );
  44
  45 const char* BUBBLE_SHAPE_IMAGES[] =
  46 {
  47   DEMO_IMAGE_DIR "bubble-ball.png",
  48   DEMO_IMAGE_DIR "icon-effect-cross.png",
  49   DEMO_IMAGE_DIR "icon-item-view-layout-spiral.png",
  50   DEMO_IMAGE_DIR "icon-replace.png"
  51 };
  52 const unsigned int NUM_BUBBLE_SHAPE_IMAGES( sizeof( BUBBLE_SHAPE_IMAGES ) / sizeof( BUBBLE_SHAPE_IMAGES[0] ) );
  53
  54 const Vector2 DEFAULT_BUBBLE_SIZE( 10.f, 30.f );
  55 const unsigned int DEFAULT_NUMBER_OF_BUBBLES( 1000 );
  56
  57 }// end LOCAL_STUFF
  58
  59 // This example shows the usage of BubbleEmitter which displays lots of moving bubbles on the window.
  60 class BubbleEffectExample : public ConnectionTracker
  61 {
  62 public:
  63   BubbleEffectExample(Application &app)
  64   : mApp(app),
  65     mBackground(),
  66     mBubbleEmitter(),
  67     mEmitAnimation(),
  68     mChangeBackgroundButton(),
  69     mChangeBubbleShapeButton(),
  70     mTimerForBubbleEmission(),
  71     mHSVDelta( Vector3( 0.f, 0.f, 0.5f ) ),
  72     mCurrentTouchPosition(),
  73     mEmitPosition(),
  74     mAnimateComponentCount( 0 ),
  75     mNonMovementCount( 0 ),
  76     mTimerInterval( 16 ),
  77     mCurrentBackgroundImageId( 0 ),
  78     mCurrentBubbleShapeImageId( 0 ),
  79     mNeedNewAnimation( true )
  80   {
  81     // Connect to the Application's Init signal
  82     app.InitSignal().Connect(this, &BubbleEffectExample::Create);
  83   }
  84
  85   ~BubbleEffectExample()
  86   {
  87   }
  88
  89 private:
  90
  91   // The Init signal is received once (only) during the Application lifetime
  92   void Create(Application& app)
  93   {
  94     Window window = app.GetWindow();
  95     Vector2 windowSize = window.GetSize();
  96
  97     window.KeyEventSignal().Connect(this, &BubbleEffectExample::OnKeyEvent);
  98
  99     // Creates a default view with a default tool bar.
 100     // The view is added to the window.
 101     Toolkit::ToolBar toolBar;
 102     Layer content = DemoHelper::CreateView( app,
 103                                             mBackground,
 104                                             toolBar,
 105                                             "",
 106                                             TOOLBAR_IMAGE,
 107                                             APPLICATION_TITLE );
 108
 109     // Add a button to change background. (right of toolbar)
 110     mChangeBackgroundButton = Toolkit::PushButton::New();
 111     mChangeBackgroundButton.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, CHANGE_BACKGROUND_ICON );
 112     mChangeBackgroundButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, CHANGE_BACKGROUND_ICON_SELECTED );
 113     mChangeBackgroundButton.ClickedSignal().Connect( this, &BubbleEffectExample::OnChangeIconClicked );
 114     toolBar.AddControl( mChangeBackgroundButton,
 115                         DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage,
 116                         Toolkit::Alignment::HORIZONTAL_RIGHT,
 117                         DemoHelper::DEFAULT_MODE_SWITCH_PADDING  );
 118     // Add a button to change bubble shape. ( left of bar )
 119     mChangeBubbleShapeButton = Toolkit::PushButton::New();
 120     mChangeBubbleShapeButton.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, CHANGE_BUBBLE_SHAPE_ICON );
 121     mChangeBubbleShapeButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, CHANGE_BUBBLE_SHAPE_ICON_SELECTED );
 122     mChangeBubbleShapeButton.ClickedSignal().Connect( this, &BubbleEffectExample::OnChangeIconClicked );
 123     toolBar.AddControl( mChangeBubbleShapeButton,
 124                         DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage,
 125                         Toolkit::Alignment::HORIZONTAL_LEFT,
 126                         DemoHelper::DEFAULT_MODE_SWITCH_PADDING  );
 127
 128     // Create and initialize the BubbleEmitter object
 129     mBubbleEmitter = Toolkit::BubbleEmitter::New( windowSize,
 130                                                   DemoHelper::LoadTexture( BUBBLE_SHAPE_IMAGES[mCurrentBubbleShapeImageId] ),
 131                                                   DEFAULT_NUMBER_OF_BUBBLES,
 132                                                   DEFAULT_BUBBLE_SIZE);
 133
 134     mBubbleEmitter.SetBackground( DemoHelper::LoadWindowFillingTexture( window.GetSize(), BACKGROUND_IMAGES[mCurrentBackgroundImageId] ), mHSVDelta );
 135
 136     // Get the root actor of all bubbles, and add it to window.
 137     Actor bubbleRoot = mBubbleEmitter.GetRootActor();
 138     bubbleRoot.SetProperty( Actor::Property::PARENT_ORIGIN,ParentOrigin::CENTER);
 139     bubbleRoot.SetProperty( Actor::Property::POSITION_Z, 0.1f); // Make sure the bubbles displayed on top og the background.
 140     content.Add( bubbleRoot );
 141
 142     // Set the application background
 143     mBackground.SetProperty( Toolkit::Control::Property::BACKGROUND, BACKGROUND_IMAGES[ mCurrentBackgroundImageId ] );
 144
 145     // Set up the timer to emit bubble regularly when the finger is touched down but not moved
 146     mTimerForBubbleEmission = Timer::New( mTimerInterval );
 147     mTimerForBubbleEmission.TickSignal().Connect(this, &BubbleEffectExample::OnTimerTick);
 148
 149     // Connect the callback to the touch signal on the background
 150     mBackground.TouchSignal().Connect( this, &BubbleEffectExample::OnTouch );
 151   }
 152
 153
 154 /***********
 155  * Emit bubbles
 156  *****************/
 157
 158   // Set up the animation of emitting bubbles, to be efficient, every animation controls multiple emission ( 4 here )
 159   void SetUpAnimation( Vector2 emitPosition, Vector2 direction )
 160   {
 161     if( mNeedNewAnimation )
 162     {
 163       float duration = Random::Range(1.f, 1.5f);
 164       mEmitAnimation = Animation::New( duration );
 165       mNeedNewAnimation = false;
 166       mAnimateComponentCount = 0;
 167     }
 168
 169     mBubbleEmitter.EmitBubble( mEmitAnimation, emitPosition, direction + Vector2(0.f, 30.f) /* upwards */, Vector2(300, 600) );
 170
 171     mAnimateComponentCount++;
 172
 173     if( mAnimateComponentCount % 4 ==0 )
 174     {
 175       mEmitAnimation.Play();
 176       mNeedNewAnimation = true;
 177     }
 178   }
 179
 180   // Emit bubbles when the finger touches down but keep stationary.
 181   // And stops emitting new bubble after being stationary for 2 seconds
 182   bool OnTimerTick()
 183   {
 184     if(mEmitPosition == mCurrentTouchPosition) // finger is not moving
 185     {
 186       mNonMovementCount++;
 187       if(mNonMovementCount < (1000 / mTimerInterval)) // 1 seconds
 188       {
 189         for(int i = 0; i < 4; i++) // emit 4 bubbles every timer tick
 190         {
 191           SetUpAnimation( mCurrentTouchPosition+Vector2(rand()%5, rand()%5), Vector2(rand()%60-30, rand()%100-50) );
 192         }
 193       }
 194     }
 195     else
 196     {
 197       mNonMovementCount = 0;
 198       mEmitPosition = mCurrentTouchPosition;
 199     }
 200
 201     return true;
 202   }
 203
 204   // Callback function of the touch signal on the background
 205   bool OnTouch(Dali::Actor actor, const Dali::TouchEvent& event)
 206   {
 207     switch( event.GetState( 0 ) )
 208     {
 209       case PointState::DOWN:
 210       {
 211         mCurrentTouchPosition = mEmitPosition = event.GetScreenPosition( 0 );
 212         mTimerForBubbleEmission.Start();
 213         mNonMovementCount = 0;
 214
 215         break;
 216       }
 217       case PointState::MOTION:
 218       {
 219         Vector2 displacement = event.GetScreenPosition( 0 ) - mCurrentTouchPosition;
 220         mCurrentTouchPosition = event.GetScreenPosition( 0 );
 221         //emit multiple bubbles along the moving direction when the finger moves quickly
 222         float step = std::min(5.f, displacement.Length());
 223         for( float i=0.25f; i<step; i=i+1.f)
 224         {
 225           SetUpAnimation( mCurrentTouchPosition+displacement*(i/step), displacement );
 226         }
 227         break;
 228       }
 229       case PointState::UP:
 230       case PointState::LEAVE:
 231       case PointState::INTERRUPTED:
 232       {
 233         mTimerForBubbleEmission.Stop();
 234         mEmitAnimation.Play();
 235         mNeedNewAnimation = true;
 236         mAnimateComponentCount = 0;
 237         break;
 238       }
 239       case PointState::STATIONARY:
 240       default:
 241       {
 242         break;
 243       }
 244
 245     }
 246     return true;
 247   }
 248
 249   bool OnChangeIconClicked( Toolkit::Button button )
 250   {
 251     if(button == mChangeBackgroundButton)
 252     {
 253       mCurrentBackgroundImageId = (mCurrentBackgroundImageId+1) % NUM_BACKGROUND_IMAGES;
 254
 255       //Update bubble emitter background
 256       mBubbleEmitter.SetBackground( DemoHelper::LoadWindowFillingTexture( mApp.GetWindow().GetSize(), BACKGROUND_IMAGES[ mCurrentBackgroundImageId  ] ), mHSVDelta );
 257
 258       // Set the application background
 259       mBackground.SetProperty( Toolkit::Control::Property::BACKGROUND, BACKGROUND_IMAGES[ mCurrentBackgroundImageId ] );
 260     }
 261     else if( button == mChangeBubbleShapeButton )
 262     {
 263       mBubbleEmitter.SetBubbleShape( DemoHelper::LoadTexture( BUBBLE_SHAPE_IMAGES[ ++mCurrentBubbleShapeImageId % NUM_BUBBLE_SHAPE_IMAGES ] ) );
 264     }
 265     return true;
 266   }
 267
 268   /**
 269    * Main key event handler
 270    */
 271   void OnKeyEvent(const KeyEvent& event)
 272   {
 273     if(event.GetState() == KeyEvent::DOWN)
 274     {
 275       if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
 276       {
 277         mApp.Quit();
 278       }
 279     }
 280   }
 281
 282 private:
 283
 284   Application&               mApp;
 285   Dali::Toolkit::Control     mBackground;
 286
 287   Toolkit::BubbleEmitter     mBubbleEmitter;
 288   Animation                  mEmitAnimation;
 289   Toolkit::PushButton        mChangeBackgroundButton;
 290   Toolkit::PushButton        mChangeBubbleShapeButton;
 291   Timer                      mTimerForBubbleEmission;
 292
 293   Vector3                    mHSVDelta;
 294   Vector2                    mCurrentTouchPosition;
 295   Vector2                    mEmitPosition;
 296
 297   unsigned int               mAnimateComponentCount;
 298   unsigned int               mNonMovementCount;
 299   unsigned int               mTimerInterval;
 300   unsigned int               mCurrentBackgroundImageId;
 301   unsigned int               mCurrentBubbleShapeImageId;
 302
 303   bool                       mNeedNewAnimation;
 304 };
 305
 306 /*****************************************************************************/
 307
 308 int DALI_EXPORT_API main(int argc, char **argv)
 309 {
 310   Application app = Application::New(&argc, &argv, DEMO_THEME_PATH);
 311   BubbleEffectExample theApp(app);
 312   app.MainLoop();
 313   return 0;
 314 }