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-item-view-layout-spiral.png",
  46   DALI_IMAGE_DIR "icon-replace.png",
  47   DALI_IMAGE_DIR "icon-effect-cross.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     mNeedNewAnimation( true ),
  78     mTimerInterval( 16 ),
  79     mCurrentBackgroundImageId( 0 ),
  80     mCurrentBubbleShapeImageId( 0 )
  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     Toolkit::Control    view;
 104     Layer content = DemoHelper::CreateView( app,
 105                                             view,
 106                                             toolBar,
 107                                             "",
 108                                             TOOLBAR_IMAGE,
 109                                             APPLICATION_TITLE );
 110
 111     // Add a button to change background. (right of toolbar)
 112     mChangeBackgroundButton = Toolkit::PushButton::New();
 113     mChangeBackgroundButton.SetBackgroundImage( ResourceImage::New( CHANGE_BACKGROUND_ICON ) );
 114     mChangeBackgroundButton.ClickedSignal().Connect( this, &BubbleEffectExample::OnChangeIconClicked );
 115     toolBar.AddControl( mChangeBackgroundButton,
 116                         DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage,
 117                         Toolkit::Alignment::HorizontalRight,
 118                         DemoHelper::DEFAULT_MODE_SWITCH_PADDING  );
 119     // Add a button to change bubble shape. ( left of bar )
 120     mChangeBubbleShapeButton = Toolkit::PushButton::New();
 121     mChangeBubbleShapeButton.SetBackgroundImage( ResourceImage::New( CHANGE_BUBBLE_SHAPE_ICON ) );
 122     mChangeBubbleShapeButton.ClickedSignal().Connect( this, &BubbleEffectExample::OnChangeIconClicked );
 123     toolBar.AddControl( mChangeBubbleShapeButton,
 124                         DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage,
 125                         Toolkit::Alignment::HorizontalLeft,
 126                         DemoHelper::DEFAULT_MODE_SWITCH_PADDING  );
 127
 128     // Create and initialize the BubbleEmitter object
 129     mBubbleEmitter = Toolkit::BubbleEmitter::New( stageSize,
 130                                                   ResourceImage::New( BUBBLE_SHAPE_IMAGES[mCurrentBubbleShapeImageId] ),
 131                                                   DEFAULT_NUMBER_OF_BUBBLES,
 132                                                   DEFAULT_BUBBLE_SIZE);
 133     mBackgroundImage = LoadStageFillingImage( BACKGROUND_IMAGES[mCurrentBackgroundImageId] );
 134     mBubbleEmitter.SetBackground( mBackgroundImage, mHSVDelta );
 135
 136     // Get the root actor of all bubbles, and add it to stage.
 137     Actor bubbleRoot = mBubbleEmitter.GetRootActor();
 138     bubbleRoot.SetParentOrigin(ParentOrigin::CENTER);
 139     bubbleRoot.SetZ(0.1f); // Make sure the bubbles displayed on top og the background.
 140     content.Add( bubbleRoot );
 141
 142     // Add the background image actor to stage
 143     view.SetBackgroundImage( mBackgroundImage );
 144     mBackgroundActor = ImageActor::DownCast( view.GetBackgroundActor() );
 145
 146     // Set up the timer to emit bubble regularly when the finger is touched down but not moved
 147     mTimerForBubbleEmission = Timer::New( mTimerInterval );
 148     mTimerForBubbleEmission.TickSignal().Connect(this, &BubbleEffectExample::OnTimerTick);
 149
 150     // Connect the callback to the touch signal on the background
 151     mBackgroundActor.TouchedSignal().Connect( this, &BubbleEffectExample::OnTouch );
 152   }
 153
 154
 155 /***********
 156  * Emit bubbles
 157  *****************/
 158
 159   // Set up the animation of emitting bubbles, to be efficient, every animation controls multiple bubbles ( 4 here )
 160   void SetUpAnimation( Vector2 emitPosition, Vector2 direction )
 161   {
 162     if( mNeedNewAnimation )
 163     {
 164       float duration = Random::Range(1.f, 1.5f);
 165       mEmitAnimation = Animation::New( duration );
 166       mNeedNewAnimation = false;
 167       mAnimateComponentCount = 0;
 168     }
 169
 170     mBubbleEmitter.EmitBubble( mEmitAnimation, emitPosition, direction + Vector2(0.f, 30.f) /* upwards */, Vector2(300, 600) );
 171
 172     mAnimateComponentCount++;
 173
 174     if( mAnimateComponentCount % 4 ==0 )
 175     {
 176       mEmitAnimation.Play();
 177       mNeedNewAnimation = true;
 178     }
 179   }
 180
 181   // Emit bubbles when the finger touches down but keep stationary.
 182   // And stops emitting new bubble after being stationary for 2 seconds
 183   bool OnTimerTick()
 184   {
 185     if(mEmitPosition == mCurrentTouchPosition) // finger is not moving
 186     {
 187       mNonMovementCount++;
 188       if(mNonMovementCount < (1000 / mTimerInterval)) // 1 seconds
 189       {
 190         for(int i = 0; i < 4; i++) // emit 4 bubbles every timer tick
 191         {
 192           SetUpAnimation( mCurrentTouchPosition+Vector2(rand()%5, rand()%5), Vector2(rand()%60-30, rand()%100-50) );
 193         }
 194       }
 195     }
 196     else
 197     {
 198       mNonMovementCount = 0;
 199       mEmitPosition = mCurrentTouchPosition;
 200     }
 201
 202     return true;
 203   }
 204
 205   // Callback function of the touch signal on the background
 206   bool OnTouch(Dali::Actor actor, const Dali::TouchEvent& event)
 207   {
 208     const TouchPoint &point = event.GetPoint(0);
 209     switch(point.state)
 210     {
 211       case TouchPoint::Down:
 212       {
 213         mCurrentTouchPosition = point.screen;
 214         mEmitPosition = point.screen;
 215         mTimerForBubbleEmission.Start();
 216         mNonMovementCount = 0;
 217
 218         break;
 219       }
 220       case TouchPoint::Motion:
 221       {
 222         Vector2 displacement = point.screen - mCurrentTouchPosition;
 223         mCurrentTouchPosition = point.screen;
 224         //emit multiple bubbles along the moving direction when the finger moves quickly
 225         float step = std::min(5.f, displacement.Length());
 226         for( float i=0.25f; i<step; i=i+1.f)
 227         {
 228           SetUpAnimation( mCurrentTouchPosition+displacement*(i/step), displacement );
 229         }
 230         break;
 231       }
 232       case TouchPoint::Up:
 233       case TouchPoint::Leave:
 234       case TouchPoint::Interrupted:
 235       {
 236         mTimerForBubbleEmission.Stop();
 237         break;
 238       }
 239       case TouchPoint::Stationary:
 240       case TouchPoint::Last:
 241       default:
 242       {
 243         break;
 244       }
 245
 246     }
 247     return true;
 248   }
 249
 250   bool OnChangeIconClicked( Toolkit::Button button )
 251   {
 252     if(button == mChangeBackgroundButton)
 253     {
 254       mBackgroundImage = LoadStageFillingImage( BACKGROUND_IMAGES[ ++mCurrentBackgroundImageId % NUM_BACKGROUND_IMAGES  ] );
 255
 256       mBubbleEmitter.SetBackground( mBackgroundImage, mHSVDelta );
 257
 258       mBackgroundActor.SetImage( mBackgroundImage );
 259     }
 260     else if( button == mChangeBubbleShapeButton )
 261     {
 262       mBubbleEmitter.SetShapeImage( ResourceImage::New( BUBBLE_SHAPE_IMAGES[ ++mCurrentBubbleShapeImageId % NUM_BUBBLE_SHAPE_IMAGES ] ) );
 263     }
 264     return true;
 265   }
 266
 267   /**
 268    * Main key event handler
 269    */
 270   void OnKeyEvent(const KeyEvent& event)
 271   {
 272     if(event.state == KeyEvent::Down)
 273     {
 274       if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
 275       {
 276         mApp.Quit();
 277       }
 278     }
 279   }
 280
 281 private:
 282
 283   Application&               mApp;
 284   Image                      mBackgroundImage;
 285   ImageActor                 mBackgroundActor;
 286
 287   Toolkit::BubbleEmitter     mBubbleEmitter;
 288   Vector3                    mHSVDelta;
 289
 290   Animation                  mEmitAnimation;
 291   unsigned int               mAnimateComponentCount;
 292   bool                       mNeedNewAnimation;
 293
 294   Timer                      mTimerForBubbleEmission;
 295   unsigned int               mNonMovementCount;
 296   unsigned int               mTimerInterval;
 297
 298   Vector2                    mCurrentTouchPosition;
 299   Vector2                    mEmitPosition;
 300
 301   Toolkit::PushButton        mChangeBackgroundButton;
 302   Toolkit::PushButton        mChangeBubbleShapeButton;
 303   unsigned int               mCurrentBackgroundImageId;
 304   unsigned int               mCurrentBubbleShapeImageId;
 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