examples/motion-stretch/motion-stretch-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 <sstream>
  19 #include <iomanip>
  20
  21 #include "shared/view.h"
  22 #include <dali/dali.h>
  23 #include <dali-toolkit/dali-toolkit.h>
  24
  25 using namespace Dali;
  26 using namespace Dali::Toolkit;
  27
  28
  29
  30 namespace // unnamed namespace
  31 {
  32
  33 ////////////////////////////////////////////////////
  34 //
  35 // Demo setup parameters
  36 //
  37
  38 const float MOTION_STRETCH_ACTOR_WIDTH = 256;                                          // actor size on screen
  39 const float MOTION_STRETCH_ACTOR_HEIGHT = 256;                                         // ""
  40
  41 const int MOTION_STRETCH_NUM_ACTOR_IMAGES = 5;
  42 const char* MOTION_STRETCH_ACTOR_IMAGE1( DALI_IMAGE_DIR "image-with-border-1.jpg" );
  43 const char* MOTION_STRETCH_ACTOR_IMAGE2( DALI_IMAGE_DIR "image-with-border-2.jpg" );
  44 const char* MOTION_STRETCH_ACTOR_IMAGE3( DALI_IMAGE_DIR "image-with-border-3.jpg" );
  45 const char* MOTION_STRETCH_ACTOR_IMAGE4( DALI_IMAGE_DIR "image-with-border-4.jpg" );
  46 const char* MOTION_STRETCH_ACTOR_IMAGE5( DALI_IMAGE_DIR "image-with-border-5.jpg" );
  47
  48 const char* MOTION_STRETCH_ACTOR_IMAGES[] = {
  49   MOTION_STRETCH_ACTOR_IMAGE1,
  50   MOTION_STRETCH_ACTOR_IMAGE2,
  51   MOTION_STRETCH_ACTOR_IMAGE3,
  52   MOTION_STRETCH_ACTOR_IMAGE4,
  53   MOTION_STRETCH_ACTOR_IMAGE5,
  54 };
  55
  56 const int NUM_ACTOR_ANIMATIONS = 4;
  57 const int NUM_CAMERA_ANIMATIONS = 2;
  58
  59
  60 const char* BACKGROUND_IMAGE_PATH = DALI_IMAGE_DIR "background-default.png";
  61
  62 const char* TOOLBAR_IMAGE( DALI_IMAGE_DIR "top-bar.png" );
  63 const char* LAYOUT_IMAGE( DALI_IMAGE_DIR "icon-change.png" );
  64 const char* APPLICATION_TITLE( "Motion Stretch" );
  65 const char* EFFECTS_OFF_ICON( DALI_IMAGE_DIR "icon-effects-off.png" );
  66 const char* EFFECTS_ON_ICON( DALI_IMAGE_DIR "icon-effects-on.png" );
  67
  68 // These values depend on the button background image
  69 const Vector4 BUTTON_IMAGE_BORDER( Vector4::ONE * 3.0f );
  70
  71 const float UI_MARGIN = 4.0f;                              ///< Screen Margin for placement of UI buttons
  72
  73 const Vector3 BUTTON_SIZE_CONSTRAINT( 0.24f, 0.09f, 1.0f );
  74
  75 // move this button down a bit so it is visible on target and not covered up by toolbar
  76 const float BUTTON_TITLE_LABEL_Y_OFFSET = 0.05f;
  77
  78 const float ORIENTATION_DURATION = 0.5f;                  ///< Time to rotate to new orientation.
  79 } // unnamed namespace
  80
  81
  82
  83
  84 //
  85 class MotionStretchExampleApp : public ConnectionTracker
  86 {
  87 public:
  88
  89   /**
  90      * DeviceOrientation describes the four different
  91      * orientations the device can be in based on accelerometer reports.
  92      */
  93   enum DeviceOrientation
  94   {
  95     PORTRAIT = 0,
  96     LANDSCAPE = 90,
  97     PORTRAIT_INVERSE = 180,
  98     LANDSCAPE_INVERSE = 270
  99   };
 100
 101   /**
 102    * Constructor
 103    * @param application class, stored as reference
 104    */
 105   MotionStretchExampleApp(Application &app)
 106   : mApplication(app),
 107     mActorEffectsEnabled(false),
 108     mCurrentActorAnimation(0),
 109     mCurrentImage(0)
 110   {
 111     // Connect to the Application's Init signal
 112     app.InitSignal().Connect(this, &MotionStretchExampleApp::OnInit);
 113   }
 114
 115   ~MotionStretchExampleApp()
 116   {
 117     // Nothing to do here; everything gets deleted automatically
 118   }
 119
 120   /**
 121    * This method gets called once the main loop of application is up and running
 122    */
 123   void OnInit(Application& app)
 124   {
 125     // The Init signal is received once (only) during the Application lifetime
 126
 127     DemoHelper::RequestThemeChange();
 128
 129     Stage::GetCurrent().KeyEventSignal().Connect(this, &MotionStretchExampleApp::OnKeyEvent);
 130
 131     // Creates a default view with a default tool bar.
 132     // The view is added to the stage.
 133     mContentLayer = DemoHelper::CreateView( mApplication,
 134                                             mView,
 135                                             mToolBar,
 136                                             BACKGROUND_IMAGE_PATH,
 137                                             TOOLBAR_IMAGE,
 138                                             APPLICATION_TITLE );
 139
 140     //Add an slideshow icon on the right of the title
 141     mIconEffectsOff = ResourceImage::New( EFFECTS_OFF_ICON );
 142     mIconEffectsOn = ResourceImage::New( EFFECTS_ON_ICON );
 143     mActorEffectsButton = Toolkit::PushButton::New();
 144     mActorEffectsButton.SetBackgroundImage( mIconEffectsOff );
 145     mActorEffectsButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnEffectButtonClicked );
 146     mToolBar.AddControl( mActorEffectsButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalCenter, DemoHelper::DEFAULT_PLAY_PADDING );
 147
 148     // Creates a mode button.
 149     // Create a effect toggle button. (right of toolbar)
 150     Image imageLayout = ResourceImage::New( LAYOUT_IMAGE );
 151     Toolkit::PushButton layoutButton = Toolkit::PushButton::New();
 152     layoutButton.SetBackgroundImage(imageLayout);
 153     layoutButton.ClickedSignal().Connect( this, &MotionStretchExampleApp::OnLayoutButtonClicked);
 154     layoutButton.SetLeaveRequired( true );
 155     mToolBar.AddControl( layoutButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalRight, DemoHelper::DEFAULT_MODE_SWITCH_PADDING );
 156
 157     // Input
 158     mTapGestureDetector = TapGestureDetector::New();
 159     mTapGestureDetector.Attach( mContentLayer );
 160     mTapGestureDetector.DetectedSignal().Connect( this, &MotionStretchExampleApp::OnTap );
 161
 162     // set initial orientation
 163     Dali::Window winHandle = app.GetWindow();
 164     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT );
 165     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE );
 166     winHandle.AddAvailableOrientation( Dali::Window::PORTRAIT_INVERSE  );
 167     winHandle.AddAvailableOrientation( Dali::Window::LANDSCAPE_INVERSE );
 168
 169     app.GetOrientation().ChangedSignal().Connect( this, &MotionStretchExampleApp::OnOrientationChanged );
 170     unsigned int degrees = app.GetOrientation().GetDegrees();
 171     Rotate( static_cast< DeviceOrientation >( degrees ) );
 172
 173
 174     ///////////////////////////////////////////////////////
 175     //
 176     // Motion stretched actor
 177     //
 178
 179     Image image = ResourceImage::New( MOTION_STRETCH_ACTOR_IMAGE1 );
 180     mMotionStretchImageActor = ImageActor::New(image);
 181     mMotionStretchImageActor.SetParentOrigin( ParentOrigin::CENTER );
 182     mMotionStretchImageActor.SetAnchorPoint( AnchorPoint::CENTER );
 183     mMotionStretchImageActor.SetSize(MOTION_STRETCH_ACTOR_WIDTH, MOTION_STRETCH_ACTOR_HEIGHT);
 184
 185     mContentLayer.Add( mMotionStretchImageActor );
 186
 187     // Create shader used for doing motion stretch
 188     mMotionStretchEffect = MotionStretchEffect::Apply(mMotionStretchImageActor);
 189   }
 190
 191   //////////////////////////////////////////////////////////////
 192   //
 193   // Device Orientation Support
 194   //
 195   //
 196
 197   void OnOrientationChanged( Orientation orientation )
 198   {
 199     unsigned int degrees = orientation.GetDegrees();
 200     Rotate( static_cast< DeviceOrientation >( degrees ) );
 201   }
 202
 203   void Rotate( DeviceOrientation orientation )
 204   {
 205     // Resize the root actor
 206     Vector2 stageSize = Stage::GetCurrent().GetSize();
 207     Vector2 targetSize = stageSize;
 208     if( orientation == LANDSCAPE ||
 209         orientation == LANDSCAPE_INVERSE )
 210     {
 211       targetSize = Vector2( stageSize.y, stageSize.x );
 212     }
 213
 214     if( mOrientation != orientation )
 215     {
 216       mOrientation = orientation;
 217
 218       // check if actor is on stage
 219       if( mView.GetParent() )
 220       {
 221         // has parent so we expect it to be on stage, start animation
 222         mRotateAnimation = Animation::New( ORIENTATION_DURATION );
 223         mRotateAnimation.RotateTo( mView, Degree( -orientation ), Vector3::ZAXIS, AlphaFunctions::EaseOut );
 224         mRotateAnimation.Resize( mView, targetSize.width, targetSize.height );
 225         mRotateAnimation.Play();
 226       }
 227       else
 228       {
 229         // set the rotation to match the orientation
 230         mView.SetOrientation( Degree( -orientation ), Vector3::ZAXIS );
 231         mView.SetSize( targetSize );
 232       }
 233     }
 234     else
 235     {
 236       // for first time just set size
 237       mView.SetSize( targetSize );
 238     }
 239   }
 240
 241   //////////////////////////////////////////////////////////////
 242   //
 243   // Actor Animation
 244   //
 245   //
 246
 247   // move to point on screen that was tapped
 248   void OnTap( Actor actor, const TapGesture& tapGesture )
 249   {
 250     Vector3 destPos;
 251     float originOffsetX, originOffsetY;
 252
 253     // rotate offset (from top left origin to centre) into actor space
 254     Vector2 stageSize = Dali::Stage::GetCurrent().GetSize();
 255     actor.ScreenToLocal(originOffsetX, originOffsetY, stageSize.width * 0.5f, stageSize.height * 0.5f);
 256
 257     // get dest point in local actor space
 258     destPos.x = tapGesture.localPoint.x - originOffsetX;
 259     destPos.y = tapGesture.localPoint.y - originOffsetY;
 260     destPos.z = 0.0f;
 261
 262     float animDuration = 0.5f;
 263     mActorTapMovementAnimation = Animation::New( animDuration );
 264     if ( mMotionStretchImageActor )
 265     {
 266       mActorTapMovementAnimation.AnimateTo( Property(mMotionStretchImageActor, Actor::Property::POSITION), destPos, AlphaFunctions::EaseInOutSine, TimePeriod(animDuration) );
 267     }
 268     mActorTapMovementAnimation.SetEndAction( Animation::Bake );
 269     mActorTapMovementAnimation.Play();
 270
 271
 272     // perform some spinning etc
 273     if(mActorEffectsEnabled)
 274     {
 275       switch(mCurrentActorAnimation)
 276       {
 277         // spin around y
 278         case 0:
 279         {
 280           float animDuration = 1.0f;
 281           mActorAnimation = Animation::New(animDuration);
 282           mActorAnimation.RotateBy(mMotionStretchImageActor, Degree(720), Vector3::YAXIS, AlphaFunctions::EaseInOut);
 283           mActorAnimation.SetEndAction( Animation::Bake );
 284           mActorAnimation.Play();
 285         }
 286         break;
 287
 288         // spin around z
 289         case 1:
 290         {
 291           float animDuration = 1.0f;
 292           mActorAnimation = Animation::New(animDuration);
 293           mActorAnimation.RotateBy(mMotionStretchImageActor, Degree(720), Vector3::ZAXIS, AlphaFunctions::EaseInOut);
 294           mActorAnimation.SetEndAction( Animation::Bake );
 295           mActorAnimation.Play();
 296         }
 297         break;
 298
 299         // spin around y and z
 300         case 2:
 301         {
 302           float animDuration = 1.0f;
 303           mActorAnimation = Animation::New(animDuration);
 304           mActorAnimation.RotateBy(mMotionStretchImageActor, Degree(360), Vector3::YAXIS, AlphaFunctions::EaseInOut);
 305           mActorAnimation.RotateBy(mMotionStretchImageActor, Degree(360), Vector3::ZAXIS, AlphaFunctions::EaseInOut);
 306           mActorAnimation.SetEndAction( Animation::Bake );
 307           mActorAnimation.Play();
 308         }
 309         break;
 310
 311         // scale
 312         case 3:
 313         {
 314           float animDuration = 1.0f;
 315           mActorAnimation = Animation::New(animDuration);
 316           mActorAnimation.ScaleBy(mMotionStretchImageActor, Vector3(2.0f, 2.0f, 2.0f), AlphaFunctions::Bounce, 0.0f, 1.0f);
 317           mActorAnimation.SetEndAction( Animation::Bake );
 318           mActorAnimation.Play();
 319         }
 320         break;
 321
 322         default:
 323           break;
 324       }
 325
 326       mCurrentActorAnimation++;
 327       if(NUM_ACTOR_ANIMATIONS == mCurrentActorAnimation)
 328       {
 329         mCurrentActorAnimation = 0;
 330       }
 331     }
 332   }
 333
 334   void ToggleActorEffects()
 335   {
 336     if(!mActorEffectsEnabled)
 337     {
 338       mActorEffectsEnabled = true;
 339       mActorEffectsButton.SetBackgroundImage( mIconEffectsOn );
 340     }
 341     else
 342     {
 343       mActorEffectsEnabled = false;
 344       mActorEffectsButton.SetBackgroundImage( mIconEffectsOff );
 345     }
 346   }
 347
 348   //////////////////////////////////////////////////////////////
 349   //
 350   // Input handlers
 351   //
 352   //
 353
 354   bool OnLayoutButtonClicked( Toolkit::Button button )
 355   {
 356     ChangeImage();
 357     return true;
 358   }
 359
 360   bool OnEffectButtonClicked( Toolkit::Button button )
 361   {
 362     ToggleActorEffects();
 363     return true;
 364   }
 365
 366   /**
 367    * Main key event handler
 368    */
 369   void OnKeyEvent(const KeyEvent& event)
 370   {
 371     if(event.state == KeyEvent::Down)
 372     {
 373       if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
 374       {
 375         mApplication.Quit();
 376       }
 377     }
 378   }
 379
 380   //////////////////////////////////////////////////////////////
 381   //
 382   // Misc
 383   //
 384   //
 385
 386
 387   void ChangeImage()
 388   {
 389     mCurrentImage++;
 390     if(MOTION_STRETCH_NUM_ACTOR_IMAGES == mCurrentImage)
 391     {
 392       mCurrentImage = 0;
 393     }
 394
 395     Image stretchImage = ResourceImage::New( MOTION_STRETCH_ACTOR_IMAGES[mCurrentImage] );
 396     mMotionStretchImageActor.SetImage(stretchImage);
 397   }
 398
 399
 400 private:
 401   Application&               mApplication;            ///< Application instance
 402   Toolkit::View              mView;
 403   Toolkit::ToolBar           mToolBar;
 404   Image                      mIconEffectsOff;
 405   Image                      mIconEffectsOn;
 406   Layer                      mContentLayer;           ///< Content layer (contains actor for this stretch demo)
 407
 408   PushButton                 mActorEffectsButton;     ///< The actor effects toggling Button.
 409
 410   // Motion stretch
 411   MotionStretchEffect mMotionStretchEffect;
 412   ImageActor mMotionStretchImageActor;
 413
 414   // animate actor to position where user taps screen
 415   Animation mActorTapMovementAnimation;
 416
 417   // show different animations to demonstrate stretch effect working on an object only movement basis
 418   bool mActorEffectsEnabled;
 419   Animation mActorAnimation;
 420   int mCurrentActorAnimation;
 421
 422   // offer a selection of images that user can cycle between
 423   int mCurrentImage;
 424
 425   TapGestureDetector mTapGestureDetector;
 426
 427   DeviceOrientation mOrientation;               ///< Current Device orientation
 428   Animation mRotateAnimation;                   ///< Animation for rotating between landscape and portrait.
 429
 430 };
 431
 432 void RunTest(Application& app)
 433 {
 434   MotionStretchExampleApp test(app);
 435
 436   app.MainLoop();
 437 }
 438
 439 // Entry point for Linux & Tizen applications
 440 //
 441 int main(int argc, char **argv)
 442 {
 443   Application app = Application::New(&argc, &argv);
 444
 445   RunTest(app);
 446
 447   return 0;
 448 }