examples/scroll-view/scroll-view-example.cpp

   1 /*
   2  * Copyright (c) 2015 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 // EXTERNAL INCLUDES
  19 #include <sstream>
  20
  21 // INTERNAL INCLUDES
  22 #include "shared/view.h"
  23 #include <dali/dali.h>
  24 #include <dali-toolkit/dali-toolkit.h>
  25
  26 using namespace Dali;
  27 using namespace Dali::Toolkit;
  28
  29 namespace
  30 {
  31 const char * const BACKGROUND_IMAGE( DALI_IMAGE_DIR "background-default.png" );
  32 const char * const TOOLBAR_IMAGE( DALI_IMAGE_DIR "top-bar.png" );
  33 const char * const APPLICATION_TITLE( "ScrollView" );
  34 const char * const EFFECT_CAROUSEL_IMAGE( DALI_IMAGE_DIR "icon-scroll-view-carousel.png" );
  35 const char * const EFFECT_CAROUSEL_IMAGE_SELECTED( DALI_IMAGE_DIR "icon-scroll-view-carousel-selected.png" );
  36
  37 const Vector3 ICON_SIZE(100.0f, 100.0f, 0.0f);
  38
  39 const char* EFFECT_MODE_NAME[] = {
  40     "PageCarousel",
  41     "PageCube",
  42     "PageSpiral",
  43     "PageWave"
  44 };
  45
  46 const char * const IMAGE_PATHS[] = {
  47     DALI_IMAGE_DIR "gallery-medium-1.jpg",
  48     DALI_IMAGE_DIR "gallery-medium-2.jpg",
  49     DALI_IMAGE_DIR "gallery-medium-3.jpg",
  50     DALI_IMAGE_DIR "gallery-medium-4.jpg",
  51     DALI_IMAGE_DIR "gallery-medium-5.jpg",
  52     DALI_IMAGE_DIR "gallery-medium-6.jpg",
  53     DALI_IMAGE_DIR "gallery-medium-7.jpg",
  54     DALI_IMAGE_DIR "gallery-medium-8.jpg",
  55     DALI_IMAGE_DIR "gallery-medium-9.jpg",
  56     DALI_IMAGE_DIR "gallery-medium-10.jpg",
  57     DALI_IMAGE_DIR "gallery-medium-11.jpg",
  58     DALI_IMAGE_DIR "gallery-medium-12.jpg",
  59     DALI_IMAGE_DIR "gallery-medium-13.jpg",
  60     DALI_IMAGE_DIR "gallery-medium-14.jpg",
  61     DALI_IMAGE_DIR "gallery-medium-15.jpg",
  62     DALI_IMAGE_DIR "gallery-medium-16.jpg",
  63     DALI_IMAGE_DIR "gallery-medium-17.jpg",
  64     DALI_IMAGE_DIR "gallery-medium-18.jpg",
  65     DALI_IMAGE_DIR "gallery-medium-19.jpg",
  66     DALI_IMAGE_DIR "gallery-medium-20.jpg",
  67     DALI_IMAGE_DIR "gallery-medium-21.jpg",
  68     DALI_IMAGE_DIR "gallery-medium-22.jpg",
  69     DALI_IMAGE_DIR "gallery-medium-23.jpg",
  70     DALI_IMAGE_DIR "gallery-medium-24.jpg",
  71     DALI_IMAGE_DIR "gallery-medium-25.jpg",
  72     DALI_IMAGE_DIR "gallery-medium-26.jpg",
  73     DALI_IMAGE_DIR "gallery-medium-27.jpg",
  74     DALI_IMAGE_DIR "gallery-medium-28.jpg",
  75     DALI_IMAGE_DIR "gallery-medium-29.jpg",
  76     DALI_IMAGE_DIR "gallery-medium-30.jpg",
  77     DALI_IMAGE_DIR "gallery-medium-31.jpg",
  78     DALI_IMAGE_DIR "gallery-medium-32.jpg",
  79     DALI_IMAGE_DIR "gallery-medium-33.jpg",
  80     DALI_IMAGE_DIR "gallery-medium-34.jpg",
  81     DALI_IMAGE_DIR "gallery-medium-35.jpg",
  82     DALI_IMAGE_DIR "gallery-medium-36.jpg",
  83     DALI_IMAGE_DIR "gallery-medium-37.jpg",
  84     DALI_IMAGE_DIR "gallery-medium-38.jpg",
  85     DALI_IMAGE_DIR "gallery-medium-39.jpg",
  86     DALI_IMAGE_DIR "gallery-medium-40.jpg",
  87     DALI_IMAGE_DIR "gallery-medium-41.jpg",
  88     DALI_IMAGE_DIR "gallery-medium-42.jpg",
  89     DALI_IMAGE_DIR "gallery-medium-43.jpg",
  90     DALI_IMAGE_DIR "gallery-medium-44.jpg",
  91     DALI_IMAGE_DIR "gallery-medium-45.jpg",
  92     DALI_IMAGE_DIR "gallery-medium-46.jpg",
  93     DALI_IMAGE_DIR "gallery-medium-47.jpg",
  94     DALI_IMAGE_DIR "gallery-medium-48.jpg",
  95     DALI_IMAGE_DIR "gallery-medium-49.jpg",
  96     DALI_IMAGE_DIR "gallery-medium-50.jpg",
  97     DALI_IMAGE_DIR "gallery-medium-51.jpg",
  98     DALI_IMAGE_DIR "gallery-medium-52.jpg",
  99     DALI_IMAGE_DIR "gallery-medium-53.jpg",
 100
 101     NULL
 102 };
 103
 104 const char * const GetNextImagePath()
 105 {
 106   static const char * const * imagePtr = &IMAGE_PATHS[0];
 107
 108   if ( *(++imagePtr) == NULL )
 109   {
 110     imagePtr = &IMAGE_PATHS[0];
 111   }
 112
 113   return *imagePtr;
 114 }
 115
 116 const int PAGE_COLUMNS = 10;                                                ///< Number of Pages going across (columns)
 117 const int PAGE_ROWS = 1;                                                    ///< Number of Pages going down (rows)
 118 const int IMAGE_ROWS = 5;                                                   ///< Number of Images going down (rows) with a Page
 119
 120 const unsigned int IMAGE_THUMBNAIL_WIDTH  = 256;                            ///< Width of Thumbnail Image in texels
 121 const unsigned int IMAGE_THUMBNAIL_HEIGHT = 256;                            ///< Height of Thumbnail Image in texels
 122
 123 const float SPIN_DURATION = 1.0f;                                           ///< Times to spin an Image by upon touching, each spin taking a second.
 124
 125 const float EFFECT_SNAP_DURATION(0.66f);                                    ///< Scroll Snap Duration for Effects
 126 const float EFFECT_FLICK_DURATION(0.5f);                                    ///< Scroll Flick Duration for Effects
 127
 128 } // unnamed namespace
 129
 130 /**
 131  * This example shows how to do custom Scroll Effects
 132  */
 133 class ExampleController : public ConnectionTracker
 134 {
 135 public:
 136
 137   /**
 138    * Constructor
 139    * @param application class, stored as reference
 140    */
 141   ExampleController( Application& application )
 142   : mApplication( application ),
 143     mView(),
 144     mScrolling(false),
 145     mEffectMode(PageCarouselEffect)
 146   {
 147     // Connect to the Application's Init and orientation changed signal
 148     mApplication.InitSignal().Connect(this, &ExampleController::OnInit);
 149   }
 150
 151   ~ExampleController()
 152   {
 153     // Nothing to do here; everything gets deleted automatically
 154   }
 155
 156   /**
 157    * This method gets called once the main loop of application is up and running
 158    */
 159   void OnInit(Application& app)
 160   {
 161     Stage stage = Dali::Stage::GetCurrent();
 162     stage.KeyEventSignal().Connect(this, &ExampleController::OnKeyEvent);
 163
 164     // Hide the indicator bar
 165     mApplication.GetWindow().ShowIndicator(Dali::Window::INVISIBLE);
 166
 167     // Creates a default view with a default tool bar.
 168     // The view is added to the stage.
 169     mContentLayer = DemoHelper::CreateView( app,
 170                                             mView,
 171                                             mToolBar,
 172                                             BACKGROUND_IMAGE,
 173                                             TOOLBAR_IMAGE,
 174                                             "" );
 175
 176     mEffectIcon[ PageCarouselEffect ] = ResourceImage::New( EFFECT_CAROUSEL_IMAGE );
 177     mEffectIconSelected[ PageCarouselEffect ] = ResourceImage::New( EFFECT_CAROUSEL_IMAGE_SELECTED );
 178     mEffectIcon[ PageCubeEffect ]     = ResourceImage::New( EFFECT_CAROUSEL_IMAGE );
 179     mEffectIconSelected[ PageCubeEffect ]     = ResourceImage::New( EFFECT_CAROUSEL_IMAGE_SELECTED );
 180     mEffectIcon[ PageSpiralEffect ]   = ResourceImage::New( EFFECT_CAROUSEL_IMAGE );
 181     mEffectIconSelected[ PageSpiralEffect ]   = ResourceImage::New( EFFECT_CAROUSEL_IMAGE_SELECTED );
 182     mEffectIcon[ PageWaveEffect ]     = ResourceImage::New( EFFECT_CAROUSEL_IMAGE );
 183     mEffectIconSelected[ PageWaveEffect ]     = ResourceImage::New( EFFECT_CAROUSEL_IMAGE_SELECTED );
 184
 185     // Create a effect change button. (right of toolbar)
 186     mEffectChangeButton = Toolkit::PushButton::New();
 187     mEffectChangeButton.ClickedSignal().Connect( this, &ExampleController::OnEffectTouched );
 188     mToolBar.AddControl( mEffectChangeButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalRight, DemoHelper::DEFAULT_MODE_SWITCH_PADDING  );
 189
 190     // Create the content layer.
 191     AddContentLayer();
 192
 193     // Hack to force screen refresh.
 194     Animation animation = Animation::New(1.0f);
 195     animation.AnimateTo(Property(mContentLayer, Actor::Property::POSITION), Vector3::ZERO );
 196     animation.Play();
 197   }
 198
 199 private:
 200
 201   /**
 202    * Adds content to the ContentLayer. This is everything we see
 203    * excluding the toolbar at the top.
 204    */
 205   void AddContentLayer()
 206   {
 207     Stage stage = Stage::GetCurrent();
 208     Vector2 stageSize = stage.GetSize();
 209
 210     mScrollView = ScrollView::New();
 211     mScrollView.SetAnchorPoint(AnchorPoint::CENTER);
 212     mScrollView.SetParentOrigin(ParentOrigin::CENTER);
 213     mContentLayer.Add( mScrollView );
 214     mScrollView.SetSize( stageSize );
 215     mScrollView.SetAxisAutoLock( true );
 216     mScrollView.SetAxisAutoLockGradient( 1.0f );
 217
 218     mScrollView.ScrollStartedSignal().Connect( this, &ExampleController::OnScrollStarted );
 219     mScrollView.ScrollCompletedSignal().Connect( this, &ExampleController::OnScrollCompleted );
 220
 221     for(int row = 0;row<PAGE_ROWS;row++)
 222     {
 223       for(int column = 0;column<PAGE_COLUMNS;column++)
 224       {
 225         Actor page = CreatePage();
 226
 227         page.SetPosition( column * stageSize.x, row * stageSize.y );
 228         mScrollView.Add( page );
 229
 230         mPages.push_back(page);
 231       }
 232     }
 233
 234     Update();
 235   }
 236
 237   /**
 238    * Updates the ScrollView and it's children based
 239    * on the current effect.
 240    */
 241   void Update()
 242   {
 243     std::stringstream ss(APPLICATION_TITLE);
 244     ss << APPLICATION_TITLE << ": " << EFFECT_MODE_NAME[mEffectMode];
 245     SetTitle(ss.str());
 246
 247     mEffectChangeButton.SetButtonImage( mEffectIcon[ mEffectMode ] );
 248     mEffectChangeButton.SetSelectedImage( mEffectIconSelected[ mEffectMode ] );
 249
 250     // remove old Effect if exists.
 251     if(mScrollViewEffect)
 252     {
 253       mScrollView.RemoveEffect(mScrollViewEffect);
 254     }
 255
 256     // apply new Effect to ScrollView
 257     ApplyEffectToScrollView();
 258     unsigned int pageCount(0);
 259     for( std::vector< Actor >::iterator pageIter = mPages.begin(); pageIter != mPages.end(); ++pageIter)
 260     {
 261       Actor page = *pageIter;
 262       ApplyEffectToPage( page, pageCount++ );
 263     }
 264   }
 265
 266   /**
 267    * Creates a page using a source of images.
 268    */
 269   Actor CreatePage()
 270   {
 271     Actor page = Actor::New();
 272     page.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
 273     page.SetParentOrigin( ParentOrigin::CENTER );
 274     page.SetAnchorPoint( AnchorPoint::CENTER );
 275
 276     Stage stage = Stage::GetCurrent();
 277     Vector2 stageSize = stage.GetSize();
 278
 279     const float margin = 10.0f;
 280
 281     // Calculate the number of images going across (columns) within a page, according to the screen resolution and dpi.
 282     int imageColumns = round(IMAGE_ROWS * (stageSize.x / stage.GetDpi().x) / (stageSize.y / stage.GetDpi().y));
 283     const Vector3 imageSize((stageSize.x / imageColumns) - margin, (stageSize.y / IMAGE_ROWS) - margin, 0.0f);
 284
 285     for(int row = 0;row<IMAGE_ROWS;row++)
 286     {
 287       for(int column = 0;column<imageColumns;column++)
 288       {
 289         ImageActor image = CreateImage( GetNextImagePath(), imageSize.x, imageSize.y );
 290
 291         image.SetParentOrigin( ParentOrigin::CENTER );
 292         image.SetAnchorPoint( AnchorPoint::CENTER );
 293
 294         Vector3 position( margin * 0.5f + (imageSize.x + margin) * column - stageSize.width * 0.5f,
 295                          margin * 0.5f + (imageSize.y + margin) * row - stageSize.height * 0.5f,
 296                           0.0f);
 297         image.SetPosition( position + imageSize * 0.5f );
 298         image.SetSize( imageSize );
 299         page.Add(image);
 300       }
 301     }
 302
 303     return page;
 304   }
 305
 306   /**
 307    * [ScrollView]
 308    * Applies effect to scrollView
 309    */
 310   void ApplyEffectToScrollView()
 311   {
 312     bool wrap(true);
 313     bool snap(true);
 314
 315     Stage stage = Stage::GetCurrent();
 316     Vector2 stageSize = stage.GetSize();
 317
 318     RulerPtr rulerX = CreateRuler(snap ? stageSize.width : 0.0f);
 319     RulerPtr rulerY = new DefaultRuler;
 320     rulerX->SetDomain(RulerDomain(0.0f, stageSize.x * PAGE_COLUMNS, !wrap));
 321     rulerY->Disable();
 322
 323     Dali::Path path = Dali::Path::New();
 324     Dali::Property::Array points;
 325         points.Resize(3);
 326     Dali::Property::Array controlPoints;
 327         controlPoints.Resize(4);
 328     Vector3 forward;
 329     if( mEffectMode == PageCarouselEffect)
 330     {
 331
 332       points[0] = Vector3( stageSize.x*0.75, 0.0f,  -stageSize.x*0.75f);
 333       points[1] = Vector3( 0.0f, 0.0f, 0.0f );
 334       points[2] = Vector3( -stageSize.x*0.75f, 0.0f,  -stageSize.x*0.75f);
 335       path.SetProperty( Path::Property::POINTS, points );
 336
 337       controlPoints[0] = Vector3( stageSize.x*0.5f, 0.0f, 0.0f );
 338       controlPoints[1] = Vector3( stageSize.x*0.5f, 0.0f, 0.0f );
 339       controlPoints[2] = Vector3(-stageSize.x*0.5f, 0.0f, 0.0f );
 340       controlPoints[3] = Vector3(-stageSize.x*0.5f, 0.0f, 0.0f );
 341       path.SetProperty( Path::Property::CONTROL_POINTS, controlPoints );
 342
 343       forward = Vector3::ZERO;
 344     }
 345     else if( mEffectMode == PageCubeEffect)
 346     {
 347       points[0] = Vector3( stageSize.x*0.5, 0.0f,  stageSize.x*0.5f);
 348       points[1] = Vector3( 0.0f, 0.0f, 0.0f );
 349       points[2] = Vector3( -stageSize.x*0.5f, 0.0f, stageSize.x*0.5f);
 350       path.SetProperty( Path::Property::POINTS, points );
 351
 352       controlPoints[0] = Vector3( stageSize.x*0.5f, 0.0f, stageSize.x*0.3f );
 353       controlPoints[1] = Vector3( stageSize.x*0.3f, 0.0f, 0.0f );
 354       controlPoints[2] = Vector3(-stageSize.x*0.3f, 0.0f, 0.0f );
 355       controlPoints[3] = Vector3(-stageSize.x*0.5f, 0.0f,  stageSize.x*0.3f );
 356       path.SetProperty( Path::Property::CONTROL_POINTS, controlPoints );
 357
 358       forward = Vector3(-1.0f,0.0f,0.0f);
 359     }
 360     else if( mEffectMode == PageSpiralEffect)
 361     {
 362       points[0] = Vector3( stageSize.x*0.5, 0.0f,  -stageSize.x*0.5f);
 363       points[1] = Vector3( 0.0f, 0.0f, 0.0f );
 364       points[2] = Vector3( -stageSize.x*0.5f, 0.0f, -stageSize.x*0.5f);
 365       path.SetProperty( Path::Property::POINTS, points );
 366
 367       controlPoints[0] = Vector3( stageSize.x*0.5f, 0.0f, 0.0f );
 368       controlPoints[1] = Vector3( stageSize.x*0.5f, 0.0f, 0.0f );
 369       controlPoints[2] = Vector3(-stageSize.x*0.5f, 0.0f, 0.0f );
 370       controlPoints[3] = Vector3(-stageSize.x*0.5f, 0.0f, 0.0f );
 371       path.SetProperty( Path::Property::CONTROL_POINTS, controlPoints );
 372
 373       forward = Vector3(-1.0f,0.0f,0.0f);
 374     }
 375     else if( mEffectMode == PageWaveEffect)
 376     {
 377       points[0] = Vector3( stageSize.x, 0.0f,  -stageSize.x);
 378       points[1] = Vector3( 0.0f, 0.0f, 0.0f );
 379       points[2] = Vector3( -stageSize.x, 0.0f, -stageSize.x);
 380       path.SetProperty( Path::Property::POINTS, points );
 381
 382       controlPoints[0] = Vector3( 0.0f, 0.0f, -stageSize.x );
 383       controlPoints[1] = Vector3( stageSize.x*0.5f, 0.0f, 0.0f );
 384       controlPoints[2] = Vector3( -stageSize.x*0.5f, 0.0f, 0.0f);
 385       controlPoints[3] = Vector3(0.0f, 0.0f,-stageSize.x  );
 386       path.SetProperty( Path::Property::CONTROL_POINTS, controlPoints );
 387
 388       forward = Vector3(-1.0f,0.0f,0.0f);
 389     }
 390
 391     mScrollViewEffect = ScrollViewPagePathEffect::New(path, forward,Toolkit::ScrollView::Property::SCROLL_FINAL_X, Vector3(stageSize.x,stageSize.y,0.0f),PAGE_COLUMNS);
 392     mScrollView.SetScrollSnapDuration(EFFECT_SNAP_DURATION);
 393     mScrollView.SetScrollFlickDuration(EFFECT_FLICK_DURATION);
 394     mScrollView.SetScrollSnapAlphaFunction(AlphaFunction::EASE_OUT);
 395     mScrollView.SetScrollFlickAlphaFunction(AlphaFunction::EASE_OUT);
 396     mScrollView.RemoveConstraintsFromChildren();
 397
 398     rulerX = CreateRuler(snap ? stageSize.width * 0.5f : 0.0f);
 399     if( wrap )
 400     {
 401       rulerX->SetDomain(RulerDomain(0.0f, stageSize.x * 0.5f * PAGE_COLUMNS, !wrap));
 402     }
 403     else
 404     {
 405       rulerX->SetDomain(RulerDomain(0.0f, stageSize.x*0.5f* (PAGE_COLUMNS+1), !wrap));
 406     }
 407
 408     unsigned int currentPage = mScrollView.GetCurrentPage();
 409     if( mScrollViewEffect )
 410     {
 411       mScrollView.ApplyEffect(mScrollViewEffect);
 412     }
 413
 414     mScrollView.SetWrapMode(wrap);
 415     mScrollView.SetRulerX( rulerX );
 416     mScrollView.SetRulerY( rulerY );
 417
 418     mScrollView.ScrollTo( currentPage, 0.0f );
 419   }
 420
 421   /**
 422    * Creates a Ruler that snaps to a specified grid size.
 423    * If that grid size is 0.0 then this ruler does not
 424    * snap.
 425    *
 426    * @param[in] gridSize (optional) The grid size for the ruler,
 427    * (Default = 0.0 i.e. no snapping)
 428    * @return The ruler is returned.
 429    */
 430   RulerPtr CreateRuler(float gridSize = 0.0f)
 431   {
 432     if(gridSize <= Math::MACHINE_EPSILON_0)
 433     {
 434         return new DefaultRuler();
 435     }
 436     return new FixedRuler(gridSize);
 437   }
 438   // end switch
 439   /**
 440     * [Page]
 441     * Applies effect to the pages within scroll view.
 442     *
 443     * @param[in] page The page Actor to apply effect to.
 444     */
 445    void ApplyEffectToPage(Actor page, unsigned int pageOrder )
 446    {
 447      page.RemoveConstraints();
 448      page.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
 449
 450      ScrollViewPagePathEffect effect = ScrollViewPagePathEffect::DownCast( mScrollViewEffect );
 451      effect.ApplyToPage( page, pageOrder );
 452    }
 453
 454   /**
 455    * Creates an Image (Helper)
 456    *
 457    * @param[in] filename the path of the image.
 458    * @param[in] width the width of the image in texels
 459    * @param[in] height the height of the image in texels.
 460    */
 461   ImageActor CreateImage( const std::string& filename, unsigned int width = IMAGE_THUMBNAIL_WIDTH, unsigned int height = IMAGE_THUMBNAIL_HEIGHT )
 462   {
 463     Image img = ResourceImage::New(filename, ImageDimensions( width, height ), Dali::FittingMode::SCALE_TO_FILL, Dali::SamplingMode::BOX_THEN_LINEAR );
 464
 465     ImageActor actor = ImageActor::New(img);
 466     actor.SetName( filename );
 467     actor.SetParentOrigin(ParentOrigin::CENTER);
 468     actor.SetAnchorPoint(AnchorPoint::CENTER);
 469
 470     actor.TouchedSignal().Connect( this, &ExampleController::OnTouchImage );
 471     return actor;
 472   }
 473
 474   /**
 475    * When scroll starts (i.e. user starts to drag scrollview),
 476    * note this state (mScrolling = true)
 477    * @param[in] position Current Scroll Position
 478    */
 479   void OnScrollStarted( const Vector2& position )
 480   {
 481     mScrolling = true;
 482   }
 483
 484   /**
 485    * When scroll starts (i.e. user stops dragging scrollview, and scrollview has snapped to destination),
 486    * note this state (mScrolling = false)
 487    * @param[in] position Current Scroll Position
 488    */
 489   void OnScrollCompleted( const Vector2& position )
 490   {
 491     mScrolling = false;
 492   }
 493
 494   /**
 495    * Upon Touching an image (Release), make it spin
 496    * (provided we're not scrolling).
 497    * @param[in] actor The actor touched
 498    * @param[in] event The TouchEvent.
 499    */
 500   bool OnTouchImage( Actor actor, const TouchEvent& event )
 501   {
 502     if( (event.points.size() > 0) && (!mScrolling) )
 503     {
 504       TouchPoint point = event.points[0];
 505       if(point.state == TouchPoint::Up)
 506       {
 507         // Spin the Image a few times.
 508         Animation animation = Animation::New(SPIN_DURATION);
 509         animation.AnimateBy( Property( actor, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f * SPIN_DURATION) ), Vector3::XAXIS ), AlphaFunction::EASE_OUT );
 510         animation.Play();
 511       }
 512     }
 513     return false;
 514   }
 515
 516   /**
 517    * Signal handler, called when the 'Effect' button has been touched.
 518    *
 519    * @param[in] button The button that was pressed.
 520    */
 521   bool OnEffectTouched(Button button)
 522   {
 523     mEffectMode = static_cast<EffectMode>((static_cast<int>(mEffectMode) + 1) % static_cast<int>(Total));
 524     Update();
 525     return true;
 526   }
 527
 528   /**
 529    * Sets/Updates the title of the View
 530    * @param[in] title The new title for the view.
 531    */
 532   void SetTitle(const std::string& title)
 533   {
 534     if(!mTitleActor)
 535     {
 536       mTitleActor = DemoHelper::CreateToolBarLabel( "" );
 537       // Add title to the tool bar.
 538       mToolBar.AddControl( mTitleActor, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarTitlePercentage, Alignment::HorizontalCenter );
 539     }
 540
 541     mTitleActor.SetProperty( Toolkit::TextLabel::Property::TEXT, title );
 542   }
 543
 544   /**
 545    * Main key event handler
 546    */
 547   void OnKeyEvent(const KeyEvent& event)
 548   {
 549     if(event.state == KeyEvent::Down)
 550     {
 551       if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
 552       {
 553         mApplication.Quit();
 554       }
 555     }
 556   }
 557
 558 private:
 559
 560   Application& mApplication;                            ///< Application instance
 561   Toolkit::Control mView;                               ///< The View instance.
 562   Toolkit::ToolBar mToolBar;                            ///< The View's Toolbar.
 563   TextLabel mTitleActor;                                ///< The Toolbar's Title.
 564   Layer mContentLayer;                                  ///< The content layer (contains game actors)
 565   ScrollView mScrollView;                               ///< ScrollView UI Component
 566   bool mScrolling;                                      ///< ScrollView scrolling state (true = scrolling, false = stationary)
 567   ScrollViewEffect mScrollViewEffect;                   ///< ScrollView Effect instance.
 568   std::vector< Actor > mPages;                          ///< Keeps track of all the pages for applying effects.
 569
 570   /**
 571    * Enumeration of different effects this scrollview can operate under.
 572    */
 573   enum EffectMode
 574   {
 575     PageCarouselEffect,                                 ///< Page carousel effect
 576     PageCubeEffect,                                     ///< Page cube effect
 577     PageSpiralEffect,                                   ///< Page spiral effect
 578     PageWaveEffect,                                     ///< Page wave effect
 579
 580     Total
 581   };
 582
 583   EffectMode mEffectMode;                               ///< Current Effect mode
 584
 585   Image mEffectIcon[Total];                             ///< Icons for the effect button
 586   Image mEffectIconSelected[Total];                     ///< Icons for the effect button when its selected
 587   Toolkit::PushButton mEffectChangeButton;              ///< Effect Change Button
 588 };
 589
 590 int main(int argc, char **argv)
 591 {
 592   Application app = Application::New(&argc, &argv, DALI_DEMO_THEME_PATH);
 593   ExampleController test(app);
 594   app.MainLoop();
 595   return 0;
 596 }