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

   1 /*
   2  * Copyright (c) 2014 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
  23 using namespace Dali;
  24
  25 namespace
  26 {
  27 const char * const TOOLBAR_IMAGE( DALI_IMAGE_DIR "top-bar.png" );
  28 const char * const APPLICATION_TITLE( "Bubble Effect" );
  29 const char * const CHANGE_BACKGROUND_ICON( DALI_IMAGE_DIR "icon-change.png" );
  30 const char * const CHANGE_BUBBLE_SHAPE_ICON( DALI_IMAGE_DIR "icon-replace.png" );
  31
  32 const char* BACKGROUND_IMAGES[]=
  33 {
  34   DALI_IMAGE_DIR "background-1.jpg",
  35   DALI_IMAGE_DIR "background-2.jpg",
  36   DALI_IMAGE_DIR "background-3.jpg",
  37   DALI_IMAGE_DIR "background-4.jpg",
  38   DALI_IMAGE_DIR "background-5.jpg",
  39 };
  40 const unsigned int NUM_BACKGROUND_IMAGES( sizeof( BACKGROUND_IMAGES ) / sizeof( BACKGROUND_IMAGES[0] ) );
  41
  42 const char* BUBBLE_SHAPE_IMAGES[] =
  43 {
  44   DALI_IMAGE_DIR "bubble-ball.png",
  45   DALI_IMAGE_DIR "icon-effect-cross.png",
  46   DALI_IMAGE_DIR "icon-item-view-layout-spiral.png",
  47   DALI_IMAGE_DIR "icon-replace.png"
  48 };
  49 const unsigned int NUM_BUBBLE_SHAPE_IMAGES( sizeof( BUBBLE_SHAPE_IMAGES ) / sizeof( BUBBLE_SHAPE_IMAGES[0] ) );
  50
  51 const Vector2 DEFAULT_BUBBLE_SIZE( 10.f, 30.f );
  52 const unsigned int DEFAULT_NUMBER_OF_BUBBLES( 1000 );
  53
  54 /**
  55  * @brief Load an image, scaled-down to no more than the stage dimensions.
  56  *
  57  * Uses image scaling mode FittingMode::SCALE_TO_FILL to resize the image at
  58  * load time to cover the entire stage with pixels with no borders,
  59  * and filter mode BOX_THEN_LINEAR to sample the image with
  60  * maximum quality.
  61  */
  62 ResourceImage LoadStageFillingImage( const char * const imagePath )
  63 {
  64   Size stageSize = Stage::GetCurrent().GetSize();
  65   return ResourceImage::New( imagePath, Dali::ImageDimensions( stageSize.x, stageSize.y ), Dali::FittingMode::SCALE_TO_FILL, Dali::SamplingMode::BOX_THEN_LINEAR );
  66 }
  67
  68 }// end LOCAL_STUFF
  69
  70 // This example shows the usage of BubbleEmitter which displays lots of moving bubbles on the stage.
  71 class BubbleEffectExample : public ConnectionTracker
  72 {
  73 public:
  74   BubbleEffectExample(Application &app)
  75   : mApp(app),
  76     mHSVDelta( Vector3( 0.f, 0.f, 0.5f ) ),
  77     mTimerInterval( 16 ),
  78     mCurrentBackgroundImageId( 0 ),
  79     mCurrentBubbleShapeImageId( 0 ),
  80     mNeedNewAnimation( true )
  81   {
  82     // Connect to the Application's Init signal
  83     app.InitSignal().Connect(this, &BubbleEffectExample::Create);
  84   }
  85
  86   ~BubbleEffectExample()
  87   {
  88   }
  89
  90 private:
  91
  92   // The Init signal is received once (only) during the Application lifetime
  93   void Create(Application& app)
  94   {
  95     Stage stage = Stage::GetCurrent();
  96     Vector2 stageSize = stage.GetSize();
  97
  98     stage.KeyEventSignal().Connect(this, &BubbleEffectExample::OnKeyEvent);
  99
 100     // Creates a default view with a default tool bar.
 101     // The view is added to the stage.
 102     Toolkit::ToolBar toolBar;
 103     Layer content = DemoHelper::CreateView( app,
 104                                             mBackground,
 105                                             toolBar,
 106                                             "",
 107                                             TOOLBAR_IMAGE,
 108                                             APPLICATION_TITLE );
 109
 110     // Add a button to change background. (right of toolbar)
 111     mChangeBackgroundButton = Toolkit::PushButton::New();
 112     mChangeBackgroundButton.SetBackgroundImage( ResourceImage::New( CHANGE_BACKGROUND_ICON ) );
 113     mChangeBackgroundButton.ClickedSignal().Connect( this, &BubbleEffectExample::OnChangeIconClicked );
 114     toolBar.AddControl( mChangeBackgroundButton,
 115                         DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage,
 116                         Toolkit::Alignment::HorizontalRight,
 117                         DemoHelper::DEFAULT_MODE_SWITCH_PADDING  );
 118     // Add a button to change bubble shape. ( left of bar )
 119     mChangeBubbleShapeButton = Toolkit::PushButton::New();
 120     mChangeBubbleShapeButton.SetBackgroundImage( ResourceImage::New( CHANGE_BUBBLE_SHAPE_ICON ) );
 121     mChangeBubbleShapeButton.ClickedSignal().Connect( this, &BubbleEffectExample::OnChangeIconClicked );
 122     toolBar.AddControl( mChangeBubbleShapeButton,
 123                         DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage,
 124                         Toolkit::Alignment::HorizontalLeft,
 125                         DemoHelper::DEFAULT_MODE_SWITCH_PADDING  );
 126
 127     // Create and initialize the BubbleEmitter object
 128     mBubbleEmitter = Toolkit::BubbleEmitter::New( stageSize,
 129                                                   ResourceImage::New( BUBBLE_SHAPE_IMAGES[mCurrentBubbleShapeImageId] ),
 130                                                   DEFAULT_NUMBER_OF_BUBBLES,
 131                                                   DEFAULT_BUBBLE_SIZE);
 132     mBackgroundImage = LoadStageFillingImage( BACKGROUND_IMAGES[mCurrentBackgroundImageId] );
 133     mBubbleEmitter.SetBackground( mBackgroundImage, mHSVDelta );
 134
 135     // Get the root actor of all bubbles, and add it to stage.
 136     Actor bubbleRoot = mBubbleEmitter.GetRootActor();
 137     bubbleRoot.SetParentOrigin(ParentOrigin::CENTER);
 138     bubbleRoot.SetZ(0.1f); // Make sure the bubbles displayed on top og the background.
 139     content.Add( bubbleRoot );
 140
 141     // Add the background image actor to stage
 142     mBackground.SetBackgroundImage( mBackgroundImage );
 143
 144     // Set up the timer to emit bubble regularly when the finger is touched down but not moved
 145     mTimerForBubbleEmission = Timer::New( mTimerInterval );
 146     mTimerForBubbleEmission.TickSignal().Connect(this, &BubbleEffectExample::OnTimerTick);
 147
 148     // Connect the callback to the touch signal on the background
 149     mBackground.TouchedSignal().Connect( this, &BubbleEffectExample::OnTouch );
 150   }
 151
 152
 153 /***********
 154  * Emit bubbles
 155  *****************/
 156
 157   // Set up the animation of emitting bubbles, to be efficient, every animation controls multiple emission ( 4 here )
 158   void SetUpAnimation( Vector2 emitPosition, Vector2 direction )
 159   {
 160     if( mNeedNewAnimation )
 161     {
 162       float duration = Random::Range(1.f, 1.5f);
 163       mEmitAnimation = Animation::New( duration );
 164       mNeedNewAnimation = false;
 165       mAnimateComponentCount = 0;
 166     }
 167
 168     mBubbleEmitter.EmitBubble( mEmitAnimation, emitPosition, direction + Vector2(0.f, 30.f) /* upwards */, Vector2(300, 600) );
 169
 170     mAnimateComponentCount++;
 171
 172     if( mAnimateComponentCount % 4 ==0 )
 173     {
 174       mEmitAnimation.Play();
 175       mNeedNewAnimation = true;
 176     }
 177   }
 178
 179   // Emit bubbles when the finger touches down but keep stationary.
 180   // And stops emitting new bubble after being stationary for 2 seconds
 181   bool OnTimerTick()
 182   {
 183     if(mEmitPosition == mCurrentTouchPosition) // finger is not moving
 184     {
 185       mNonMovementCount++;
 186       if(mNonMovementCount < (1000 / mTimerInterval)) // 1 seconds
 187       {
 188         for(int i = 0; i < 4; i++) // emit 4 bubbles every timer tick
 189         {
 190           SetUpAnimation( mCurrentTouchPosition+Vector2(rand()%5, rand()%5), Vector2(rand()%60-30, rand()%100-50) );
 191         }
 192       }
 193     }
 194     else
 195     {
 196       mNonMovementCount = 0;
 197       mEmitPosition = mCurrentTouchPosition;
 198     }
 199
 200     return true;
 201   }
 202
 203   // Callback function of the touch signal on the background
 204   bool OnTouch(Dali::Actor actor, const Dali::TouchEvent& event)
 205   {
 206     const TouchPoint &point = event.GetPoint(0);
 207     switch(point.state)
 208     {
 209       case TouchPoint::Down:
 210       {
 211         mCurrentTouchPosition = point.screen;
 212         mEmitPosition = point.screen;
 213         mTimerForBubbleEmission.Start();
 214         mNonMovementCount = 0;
 215
 216         break;
 217       }
 218       case TouchPoint::Motion:
 219       {
 220         Vector2 displacement = point.screen - mCurrentTouchPosition;
 221         mCurrentTouchPosition = point.screen;
 222         //emit multiple bubbles along the moving direction when the finger moves quickly
 223         float step = std::min(5.f, displacement.Length());
 224         for( float i=0.25f; i<step; i=i+1.f)
 225         {
 226           SetUpAnimation( mCurrentTouchPosition+displacement*(i/step), displacement );
 227         }
 228         break;
 229       }
 230       case TouchPoint::Up:
 231       case TouchPoint::Leave:
 232       case TouchPoint::Interrupted:
 233       {
 234         mTimerForBubbleEmission.Stop();
 235         mEmitAnimation.Play();
 236         mNeedNewAnimation = true;
 237         mAnimateComponentCount = 0;
 238         break;
 239       }
 240       case TouchPoint::Stationary:
 241       case TouchPoint::Last:
 242       default:
 243       {
 244         break;
 245       }
 246
 247     }
 248     return true;
 249   }
 250
 251   bool OnChangeIconClicked( Toolkit::Button button )
 252   {
 253     if(button == mChangeBackgroundButton)
 254     {
 255       mBackgroundImage = LoadStageFillingImage( BACKGROUND_IMAGES[ ++mCurrentBackgroundImageId % NUM_BACKGROUND_IMAGES  ] );
 256
 257       mBubbleEmitter.SetBackground( mBackgroundImage, mHSVDelta );
 258
 259       mBackground.SetBackgroundImage( mBackgroundImage );
 260     }
 261     else if( button == mChangeBubbleShapeButton )
 262     {
 263       mBubbleEmitter.SetShapeImage( ResourceImage::New( 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.state == 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   Image                      mBackgroundImage;
 286   Dali::Toolkit::Control     mBackground;
 287
 288   Toolkit::BubbleEmitter     mBubbleEmitter;
 289   Animation                  mEmitAnimation;
 290   Toolkit::PushButton        mChangeBackgroundButton;
 291   Toolkit::PushButton        mChangeBubbleShapeButton;
 292   Timer                      mTimerForBubbleEmission;
 293
 294   Vector3                    mHSVDelta;
 295   Vector2                    mCurrentTouchPosition;
 296   Vector2                    mEmitPosition;
 297
 298   unsigned int               mAnimateComponentCount;
 299   unsigned int               mNonMovementCount;
 300   unsigned int               mTimerInterval;
 301   unsigned int               mCurrentBackgroundImageId;
 302   unsigned int               mCurrentBubbleShapeImageId;
 303
 304   bool                       mNeedNewAnimation;
 305 };
 306
 307 /*****************************************************************************/
 308
 309 static void
 310 RunTest(Application& app)
 311 {
 312   BubbleEffectExample theApp(app);
 313   app.MainLoop();
 314 }
 315
 316 /*****************************************************************************/
 317
 318 int
 319 main(int argc, char **argv)
 320 {
 321   Application app = Application::New(&argc, &argv, DALI_DEMO_THEME_PATH);
 322
 323   RunTest(app);
 324
 325   return 0;
 326 }
 327
 328
 329