examples/motion-stretch/motion-stretch-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 <sstream>
  19 #include <iomanip>
  20
  21 #include "shared/view.h"
  22 #include <dali/dali.h>
  23 #include <dali/devel-api/actors/actor-devel.h>
  24 #include <dali-toolkit/dali-toolkit.h>
  25 #include <dali-toolkit/devel-api/shader-effects/motion-stretch-effect.h>
  26
  27 using namespace Dali;
  28 using namespace Dali::Toolkit;
  29
  30
  31
  32 namespace // unnamed namespace
  33 {
  34
  35 ////////////////////////////////////////////////////
  36 //
  37 // Demo setup parameters
  38 //
  39
  40 const float MOTION_STRETCH_ACTOR_WIDTH = 256;                                          // actor size on screen
  41 const float MOTION_STRETCH_ACTOR_HEIGHT = 256;                                         // ""
  42
  43 const int MOTION_STRETCH_NUM_ACTOR_IMAGES = 5;
  44 const char* MOTION_STRETCH_ACTOR_IMAGE1( DEMO_IMAGE_DIR "image-with-border-1.jpg" );
  45 const char* MOTION_STRETCH_ACTOR_IMAGE2( DEMO_IMAGE_DIR "image-with-border-2.jpg" );
  46 const char* MOTION_STRETCH_ACTOR_IMAGE3( DEMO_IMAGE_DIR "image-with-border-3.jpg" );
  47 const char* MOTION_STRETCH_ACTOR_IMAGE4( DEMO_IMAGE_DIR "image-with-border-4.jpg" );
  48 const char* MOTION_STRETCH_ACTOR_IMAGE5( DEMO_IMAGE_DIR "image-with-border-5.jpg" );
  49
  50 const char* MOTION_STRETCH_ACTOR_IMAGES[] = {
  51   MOTION_STRETCH_ACTOR_IMAGE1,
  52   MOTION_STRETCH_ACTOR_IMAGE2,
  53   MOTION_STRETCH_ACTOR_IMAGE3,
  54   MOTION_STRETCH_ACTOR_IMAGE4,
  55   MOTION_STRETCH_ACTOR_IMAGE5,
  56 };
  57
  58 const int NUM_ACTOR_ANIMATIONS = 4;
  59 const int NUM_CAMERA_ANIMATIONS = 2;
  60
  61
  62 const char* BACKGROUND_IMAGE_PATH = DEMO_IMAGE_DIR "background-default.png";
  63
  64 const char* TOOLBAR_IMAGE( DEMO_IMAGE_DIR "top-bar.png" );
  65 const char* LAYOUT_IMAGE( DEMO_IMAGE_DIR "icon-change.png" );
  66 const char* LAYOUT_IMAGE_SELECTED( DEMO_IMAGE_DIR "icon-change-selected.png" );
  67 const char* APPLICATION_TITLE( "Motion Stretch" );
  68 const char* EFFECTS_OFF_ICON( DEMO_IMAGE_DIR "icon-effects-off.png" );
  69 const char* EFFECTS_OFF_ICON_SELECTED( DEMO_IMAGE_DIR "icon-effects-off-selected.png" );
  70 const char* EFFECTS_ON_ICON( DEMO_IMAGE_DIR "icon-effects-on.png" );
  71 const char* EFFECTS_ON_ICON_SELECTED( DEMO_IMAGE_DIR "icon-effects-on-selected.png" );
  72
  73 // These values depend on the button background image
  74 const Vector4 BUTTON_IMAGE_BORDER( Vector4::ONE * 3.0f );
  75
  76 const float UI_MARGIN = 4.0f;                              ///< Screen Margin for placement of UI buttons
  77
  78 const Vector3 BUTTON_SIZE_CONSTRAINT( 0.24f, 0.09f, 1.0f );
  79
  80 // move this button down a bit so it is visible on target and not covered up by toolbar
  81 const float BUTTON_TITLE_LABEL_Y_OFFSET = 0.05f;
  82
  83 const float ORIENTATION_DURATION = 0.5f;                  ///< Time to rotate to new orientation.
  84 } // unnamed namespace
  85
  86
  87
  88
  89 //
  90 class MotionStretchExampleApp : public ConnectionTracker
  91 {
  92 public:
  93
  94   /**
  95      * DeviceOrientation describes the four different
  96      * orientations the device can be in based on accelerometer reports.
  97      */
  98   enum DeviceOrientation
  99   {
 100     PORTRAIT = 0,
 101     LANDSCAPE = 90,
 102     PORTRAIT_INVERSE = 180,
 103     LANDSCAPE_INVERSE = 270
 104   };
 105
 106   /**
 107    * Constructor
 108    * @param application class, stored as reference
 109    */
 110   MotionStretchExampleApp(Application &app)
 111   : mApplication(app),
 112     mActorEffectsEnabled(false),
 113     mCurrentActorAnimation(0),
 114     mCurrentImage(0),
 115     mOrientation( PORTRAIT )
 116   {
 117     // Connect to the Application's Init signal
 118     app.InitSignal().Connect(this, &MotionStretchExampleApp::OnInit);
 119   }
 120
 121   ~MotionStretchExampleApp()
 122   {
 123     // Nothing to do here; everything gets deleted automatically
 124   }
 125
 126   /**
 127    * This method gets called once the main loop of application is up and running
 128    */
 129   void OnInit(Application& app)
 130   {
 131     // The Init signal is received once (only) during the Application lifetime
 132
 133     Stage::GetCurrent().KeyEventSignal().Connect(this, &MotionStretchExampleApp::OnKeyEvent);
 134
 135     // Creates a default view with a default tool bar.
 136     // The view is added to the stage.
 137     mContentLayer = DemoHelper::CreateView( mApplication,
 138                                             mView,
 139                                             mToolBar,
 140                                             BACKGROUND_IMAGE_PATH,
 141                                             TOOLBAR_IMAGE,
 142                                             APPLICATION_TITLE );
 143
 144     // Ensure the content layer is a square so the touch area works in all orientations
 145     Vector2 stageSize = Stage::GetCurrent().GetSize();
 146     float size = std::max( stageSize.width, stageSize.height );
 147     mContentLayer.SetProperty( Actor::Property::SIZE, Vector2( size, size ) );
 148
 149     //Add an slideshow icon on the right of the title
 150     mActorEffectsButton = Toolkit::PushButton::New();
 151     mActorEffectsButton.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, EFFECTS_OFF_ICON );
 152     mActorEffectsButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, EFFECTS_OFF_ICON_SELECTED );
 153     mActorEffectsButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnEffectButtonClicked );
 154     mToolBar.AddControl( mActorEffectsButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalCenter, DemoHelper::DEFAULT_PLAY_PADDING );
 155
 156     // Creates a mode button.
 157     // Create a effect toggle button. (right of toolbar)
 158     Toolkit::PushButton layoutButton = Toolkit::PushButton::New();
 159     layoutButton.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, LAYOUT_IMAGE );
 160     layoutButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, LAYOUT_IMAGE_SELECTED );
 161     layoutButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnLayoutButtonClicked);
 162     layoutButton.SetProperty( Actor::Property::LEAVE_REQUIRED, true );
 163     mToolBar.AddControl( layoutButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalRight, DemoHelper::DEFAULT_MODE_SWITCH_PADDING );
 164
 165     // Input
 166     mTapGestureDetector = TapGestureDetector::New();
 167     mTapGestureDetector.Attach( mContentLayer );
 168     mTapGestureDetector.DetectedSignal().Connect( this, &MotionStretchExampleApp::OnTap );
 169
 170     // set initial orientation
 171     Dali::Window winHandle = app.GetWindow();
 172     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT );
 173     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE );
 174     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT_INVERSE  );
 175     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE_INVERSE );
 176     winHandle.ResizeSignal().Connect( this, &MotionStretchExampleApp::OnWindowResized );
 177
 178     // set initial orientation
 179     Rotate( PORTRAIT );
 180
 181     ///////////////////////////////////////////////////////
 182     //
 183     // Motion stretched actor
 184     //
 185     mMotionStretchEffect = Toolkit::CreateMotionStretchEffect();
 186     mMotionStretchEffect["url"] = MOTION_STRETCH_ACTOR_IMAGE1;
 187     mMotionStretchImageView = ImageView::New();
 188     mMotionStretchImageView.SetProperty( Toolkit::ImageView::Property::IMAGE, mMotionStretchEffect );
 189     mMotionStretchImageView.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER );
 190     mMotionStretchImageView.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER );
 191     mMotionStretchImageView.SetProperty( Actor::Property::SIZE, Vector2( MOTION_STRETCH_ACTOR_WIDTH, MOTION_STRETCH_ACTOR_HEIGHT ) );
 192     // Add stretch padding
 193     mMotionStretchImageView.SetProperty( DevelActor::Property::UPDATE_SIZE_HINT, Vector2( MOTION_STRETCH_ACTOR_WIDTH+32, MOTION_STRETCH_ACTOR_HEIGHT+32 ) );
 194
 195     mContentLayer.Add( mMotionStretchImageView );
 196
 197     // Create shader used for doing motion stretch
 198     Toolkit::SetMotionStretchProperties( mMotionStretchImageView );
 199   }
 200
 201   //////////////////////////////////////////////////////////////
 202   //
 203   // Device Orientation Support
 204   //
 205   //
 206
 207   void OnWindowResized( Window window, Window::WindowSize size )
 208   {
 209     Rotate( size.GetWidth() > size.GetHeight() ? LANDSCAPE : PORTRAIT );
 210   }
 211
 212   void Rotate( DeviceOrientation orientation )
 213   {
 214     // Resize the root actor
 215     const Vector2 targetSize = Stage::GetCurrent().GetSize();
 216
 217     if( mOrientation != orientation )
 218     {
 219       mOrientation = orientation;
 220
 221       // check if actor is on stage
 222       if( mView.GetParent() )
 223       {
 224         // has parent so we expect it to be on stage, start animation
 225         mRotateAnimation = Animation::New( ORIENTATION_DURATION );
 226         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_WIDTH ), targetSize.width );
 227         mRotateAnimation.AnimateTo( Property( mView, Actor::Property::SIZE_HEIGHT ), targetSize.height );
 228         mRotateAnimation.Play();
 229       }
 230       else
 231       {
 232         mView.SetProperty( Actor::Property::SIZE, targetSize );
 233       }
 234     }
 235     else
 236     {
 237       // for first time just set size
 238       mView.SetProperty( Actor::Property::SIZE, targetSize );
 239     }
 240   }
 241
 242   //////////////////////////////////////////////////////////////
 243   //
 244   // Actor Animation
 245   //
 246   //
 247
 248   // move to point on screen that was tapped
 249   void OnTap( Actor actor, const TapGesture& tapGesture )
 250   {
 251     Vector3 destPos;
 252     float originOffsetX, originOffsetY;
 253
 254     // rotate offset (from top left origin to centre) into actor space
 255     Vector2 stageSize = Dali::Stage::GetCurrent().GetSize();
 256     actor.ScreenToLocal(originOffsetX, originOffsetY, stageSize.width * 0.5f, stageSize.height * 0.5f);
 257
 258     // get dest point in local actor space
 259     destPos.x = tapGesture.localPoint.x - originOffsetX;
 260     destPos.y = tapGesture.localPoint.y - originOffsetY;
 261     destPos.z = 0.0f;
 262
 263     float animDuration = 0.5f;
 264     mActorTapMovementAnimation = Animation::New( animDuration );
 265     if ( mMotionStretchImageView )
 266     {
 267       mActorTapMovementAnimation.AnimateTo( Property(mMotionStretchImageView, Actor::Property::POSITION), destPos, AlphaFunction::EASE_IN_OUT_SINE, TimePeriod(animDuration) );
 268     }
 269     mActorTapMovementAnimation.SetEndAction( Animation::Bake );
 270     mActorTapMovementAnimation.Play();
 271
 272
 273     // perform some spinning etc
 274     if(mActorEffectsEnabled)
 275     {
 276       switch(mCurrentActorAnimation)
 277       {
 278         // spin around y
 279         case 0:
 280         {
 281           float animDuration = 1.0f;
 282           mActorAnimation = Animation::New(animDuration);
 283           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::YAXIS ), AlphaFunction::EASE_IN_OUT );
 284           mActorAnimation.SetEndAction( Animation::Bake );
 285           mActorAnimation.Play();
 286         }
 287         break;
 288
 289         // spin around z
 290         case 1:
 291         {
 292           float animDuration = 1.0f;
 293           mActorAnimation = Animation::New(animDuration);
 294           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::ZAXIS ), AlphaFunction::EASE_IN_OUT );
 295           mActorAnimation.SetEndAction( Animation::Bake );
 296           mActorAnimation.Play();
 297         }
 298         break;
 299
 300         // spin around y and z
 301         case 2:
 302         {
 303           float animDuration = 1.0f;
 304           mActorAnimation = Animation::New(animDuration);
 305           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::YAXIS ), AlphaFunction::EASE_IN_OUT );
 306           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::ORIENTATION ), Quaternion( Radian( Degree(360.0f) ), Vector3::ZAXIS ), AlphaFunction::EASE_IN_OUT );
 307           mActorAnimation.SetEndAction( Animation::Bake );
 308           mActorAnimation.Play();
 309         }
 310         break;
 311
 312         // scale
 313         case 3:
 314         {
 315           float animDuration = 1.0f;
 316           mActorAnimation = Animation::New(animDuration);
 317           mActorAnimation.AnimateBy( Property( mMotionStretchImageView, Actor::Property::SCALE ), Vector3(2.0f, 2.0f, 2.0f), AlphaFunction::BOUNCE, TimePeriod( 0.0f, 1.0f ) );
 318           mActorAnimation.SetEndAction( Animation::Bake );
 319           mActorAnimation.Play();
 320         }
 321         break;
 322
 323         default:
 324           break;
 325       }
 326
 327       mCurrentActorAnimation++;
 328       if(NUM_ACTOR_ANIMATIONS == mCurrentActorAnimation)
 329       {
 330         mCurrentActorAnimation = 0;
 331       }
 332     }
 333   }
 334
 335   void ToggleActorEffects()
 336   {
 337     if(!mActorEffectsEnabled)
 338     {
 339       mActorEffectsEnabled = true;
 340       mActorEffectsButton.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, EFFECTS_ON_ICON );
 341       mActorEffectsButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, EFFECTS_ON_ICON_SELECTED );
 342     }
 343     else
 344     {
 345       mActorEffectsEnabled = false;
 346       mActorEffectsButton.SetProperty( Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, EFFECTS_OFF_ICON );
 347       mActorEffectsButton.SetProperty( Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, EFFECTS_OFF_ICON_SELECTED );
 348     }
 349   }
 350
 351   //////////////////////////////////////////////////////////////
 352   //
 353   // Input handlers
 354   //
 355   //
 356
 357   bool OnLayoutButtonClicked( Toolkit::Button button )
 358   {
 359     ChangeImage();
 360     return true;
 361   }
 362
 363   bool OnEffectButtonClicked( Toolkit::Button button )
 364   {
 365     ToggleActorEffects();
 366     return true;
 367   }
 368
 369   /**
 370    * Main key event handler
 371    */
 372   void OnKeyEvent(const KeyEvent& event)
 373   {
 374     if(event.state == KeyEvent::Down)
 375     {
 376       if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
 377       {
 378         mApplication.Quit();
 379       }
 380     }
 381   }
 382
 383   //////////////////////////////////////////////////////////////
 384   //
 385   // Misc
 386   //
 387   //
 388
 389
 390   void ChangeImage()
 391   {
 392     mCurrentImage++;
 393     if(MOTION_STRETCH_NUM_ACTOR_IMAGES == mCurrentImage)
 394     {
 395       mCurrentImage = 0;
 396     }
 397
 398     mMotionStretchEffect["url"] = MOTION_STRETCH_ACTOR_IMAGES[mCurrentImage];
 399     mMotionStretchImageView.SetProperty( Toolkit::ImageView::Property::IMAGE, mMotionStretchEffect );
 400   }
 401
 402
 403 private:
 404   Application&               mApplication;            ///< Application instance
 405   Toolkit::Control           mView;
 406   Toolkit::ToolBar           mToolBar;
 407   Layer                      mContentLayer;           ///< Content layer (contains actor for this stretch demo)
 408
 409   PushButton                 mActorEffectsButton;     ///< The actor effects toggling Button.
 410
 411   // Motion stretch
 412   Property::Map mMotionStretchEffect;
 413   ImageView mMotionStretchImageView;
 414
 415   // animate actor to position where user taps screen
 416   Animation mActorTapMovementAnimation;
 417
 418   // show different animations to demonstrate stretch effect working on an object only movement basis
 419   bool mActorEffectsEnabled;
 420   Animation mActorAnimation;
 421   int mCurrentActorAnimation;
 422
 423   // offer a selection of images that user can cycle between
 424   int mCurrentImage;
 425
 426   TapGestureDetector mTapGestureDetector;
 427
 428   DeviceOrientation mOrientation;               ///< Current Device orientation
 429   Animation mRotateAnimation;                   ///< Animation for rotating between landscape and portrait.
 430
 431 };
 432
 433 int DALI_EXPORT_API main(int argc, char **argv)
 434 {
 435   Application app = Application::New(&argc, &argv, DEMO_THEME_PATH);
 436   MotionStretchExampleApp test(app);
 437   app.MainLoop();
 438   return 0;
 439 }