examples/image-scaling-and-filtering/image-scaling-and-filtering-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 <dali/dali.h>
  19 #include <dali/devel-api/actors/actor-devel.h>
  20 #include <dali-toolkit/dali-toolkit.h>
  21 #include <dali-toolkit/devel-api/controls/popup/popup.h>
  22 #include <dali-toolkit/devel-api/controls/table-view/table-view.h>
  23 #include "shared/view.h"
  24 #include <iostream>
  25
  26 using namespace Dali;
  27 using Toolkit::TextLabel;
  28
  29 namespace
  30 {
  31
  32 const char* BACKGROUND_IMAGE( DEMO_IMAGE_DIR "background-gradient.jpg" );
  33 const Vector4 BACKGROUND_COLOUR( 1.0f, 1.0f, 1.0f, 0.15f );
  34
  35 const char* BORDER_IMAGE( DEMO_IMAGE_DIR "border-4px.9.png" );
  36 const int BORDER_WIDTH = ( 11.0f + 4.0f ); // Shadow size = 11, border size = 4.
  37 const char* RESIZE_HANDLE_IMAGE( DEMO_IMAGE_DIR "resize-handle.png" );
  38
  39 const int MARGIN_SIZE = 10;
  40
  41 const char* const NEXT_BUTTON_ID = "NEXT_BUTTON";
  42 const char* const PREVIOUS_BUTTON_ID = "PREVIOUS_BUTTON";
  43 const char * const DALI_ICON_PLAY = DEMO_IMAGE_DIR "icon-play.png";
  44
  45 const char* const FITTING_BUTTON_ID = "FITTING_BUTTON";
  46 const char* const SAMPLING_BUTTON_ID = "SAMPLING_BUTTON";
  47 const char* const FITTING_BUTTON_TEXT = "Fitting";
  48 const char* const SAMPLING_BUTTON_TEXT = "Sampling";
  49
  50 const char* const STYLE_LABEL_TEXT  = "ImageScalingGroupLabel";
  51 const char* const STYLE_BUTTON_TEXT = "ImageScalingButton";
  52
  53 const char* IMAGE_PATHS[] =
  54 {
  55   // Variety of sizes, shapes and formats:
  56   DEMO_IMAGE_DIR "dali-logo.png",
  57   DEMO_IMAGE_DIR "layer1.png",
  58   DEMO_IMAGE_DIR "layer2.png",
  59   DEMO_IMAGE_DIR "animation-list.png",
  60   DEMO_IMAGE_DIR "music-libray-main-screen.png",
  61   DEMO_IMAGE_DIR "music-libray-record-cover.png",
  62   DEMO_IMAGE_DIR "contacts-background.png",
  63   DEMO_IMAGE_DIR "portrait_screen_primitive_shapes.gif",
  64   DEMO_IMAGE_DIR "landscape_screen_primitive_shapes.gif",
  65   DEMO_IMAGE_DIR "square_primitive_shapes.bmp",
  66   DEMO_IMAGE_DIR "gallery-large-14.jpg",
  67   DEMO_IMAGE_DIR "book-landscape-cover.jpg",
  68   DEMO_IMAGE_DIR "book-portrait-p1.jpg",
  69   DEMO_IMAGE_DIR "book-landscape-cover-back.jpg",
  70
  71   // Worst case for aliasing in downscaling, 2k x 2k 1 bit per pixel dithered
  72   // black and white image:
  73   DEMO_IMAGE_DIR "gallery-large-14.wbmp",
  74
  75   DEMO_IMAGE_DIR "background-1.jpg",
  76   DEMO_IMAGE_DIR "background-blocks.jpg",
  77   DEMO_IMAGE_DIR "background-magnifier.jpg",
  78   DEMO_IMAGE_DIR "gallery-large-14.jpg",
  79   NULL
  80 };
  81 const int NUM_IMAGE_PATHS = sizeof(IMAGE_PATHS) / sizeof(IMAGE_PATHS[0]) - 1u;
  82
  83 /** Cycle the scaling mode options. */
  84 FittingMode::Type NextScalingMode( FittingMode::Type oldMode )
  85 {
  86   FittingMode::Type newMode = FittingMode::SHRINK_TO_FIT;
  87   switch ( oldMode )
  88   {
  89     case FittingMode::SHRINK_TO_FIT:
  90       newMode = FittingMode::SCALE_TO_FILL;
  91       break;
  92     case FittingMode::SCALE_TO_FILL:
  93       newMode = FittingMode::FIT_WIDTH;
  94       break;
  95     case FittingMode::FIT_WIDTH:
  96       newMode = FittingMode::FIT_HEIGHT;
  97       break;
  98     case FittingMode::FIT_HEIGHT:
  99       newMode = FittingMode::SHRINK_TO_FIT;
 100       break;
 101   }
 102   return newMode;
 103 }
 104
 105 /** Cycle through filter mode options. */
 106 SamplingMode::Type NextFilterMode( SamplingMode::Type oldMode )
 107 {
 108   SamplingMode::Type newMode = SamplingMode::BOX;
 109
 110   switch ( oldMode )
 111   {
 112     case SamplingMode::BOX:
 113       newMode = SamplingMode::NEAREST;
 114       break;
 115     case SamplingMode::NEAREST:
 116       newMode = SamplingMode::LINEAR;
 117       break;
 118     case SamplingMode::LINEAR:
 119       newMode = SamplingMode::BOX_THEN_NEAREST;
 120       break;
 121     case SamplingMode::BOX_THEN_NEAREST:
 122       newMode = SamplingMode::BOX_THEN_LINEAR;
 123       break;
 124     case SamplingMode::BOX_THEN_LINEAR:
 125       newMode = SamplingMode::NO_FILTER;
 126       break;
 127     case SamplingMode::NO_FILTER:
 128       newMode = SamplingMode::BOX;
 129       break;
 130     case SamplingMode::DONT_CARE:
 131       newMode = SamplingMode::BOX;
 132       break;
 133   }
 134   return newMode;
 135 }
 136
 137 const char* StringFromScalingMode( FittingMode::Type scalingMode )
 138 {
 139   return scalingMode == FittingMode::SCALE_TO_FILL ? "SCALE_TO_FILL" : scalingMode == FittingMode::SHRINK_TO_FIT ? "SHRINK_TO_FIT" : scalingMode == FittingMode::FIT_WIDTH ? "FIT_WIDTH" : scalingMode == FittingMode::FIT_HEIGHT ? "FIT_HEIGHT" : "UnknownScalingMode";
 140 }
 141
 142 const char* StringFromFilterMode( SamplingMode::Type filterMode )
 143 {
 144   return filterMode == SamplingMode::BOX ? "BOX" : filterMode == SamplingMode::BOX_THEN_NEAREST ? "BOX_THEN_NEAREST" : filterMode == SamplingMode::BOX_THEN_LINEAR ? "BOX_THEN_LINEAR" : filterMode == SamplingMode::NEAREST ? "NEAREST" : filterMode == SamplingMode::LINEAR ? "LINEAR" : filterMode == SamplingMode::NO_FILTER ? "NO_FILTER" : filterMode == SamplingMode::DONT_CARE ? "DONT_CARE" : "UnknownFilterMode";
 145 }
 146
 147 }
 148
 149 // This example shows the load-time image scaling and filtering features.
 150 //
 151 class ImageScalingAndFilteringController : public ConnectionTracker
 152 {
 153 public:
 154
 155   ImageScalingAndFilteringController( Application& application )
 156   : mApplication( application ),
 157     mLastPinchScale( 1.0f ),
 158     mImageWindowScale( 0.5f, 0.5f ),
 159     mCurrentPath( 0 ),
 160     mFittingMode( FittingMode::FIT_WIDTH ),
 161     mSamplingMode( SamplingMode::BOX_THEN_LINEAR),
 162     mImageLoading( false ),
 163     mQueuedImageLoad( false )
 164   {
 165     // Connect to the Application's Init signal
 166     mApplication.InitSignal().Connect( this, &ImageScalingAndFilteringController::Create );
 167   }
 168
 169   ~ImageScalingAndFilteringController()
 170   {
 171     // Nothing to do here;
 172   }
 173
 174   // The Init signal is received once (only) during the Application lifetime
 175   void Create( Application& application )
 176   {
 177     // Get a handle to the window
 178     Window window = application.GetWindow();
 179     Vector2 windowSize = window.GetSize();
 180
 181     // Background image:
 182     Dali::Property::Map backgroundImage;
 183     backgroundImage.Insert( Toolkit::Visual::Property::TYPE,  Toolkit::Visual::IMAGE );
 184     backgroundImage.Insert( Toolkit::ImageVisual::Property::URL,  BACKGROUND_IMAGE );
 185     backgroundImage.Insert( Toolkit::ImageVisual::Property::DESIRED_WIDTH, windowSize.width );
 186     backgroundImage.Insert( Toolkit::ImageVisual::Property::DESIRED_HEIGHT, windowSize.height );
 187     backgroundImage.Insert( Toolkit::ImageVisual::Property::FITTING_MODE,   FittingMode::SCALE_TO_FILL );
 188     backgroundImage.Insert( Toolkit::ImageVisual::Property::SAMPLING_MODE,   SamplingMode::BOX_THEN_NEAREST );
 189
 190     Toolkit::ImageView background = Toolkit::ImageView::New();
 191     background.SetProperty( Toolkit::ImageView::Property::IMAGE, backgroundImage );
 192     background.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT );
 193     background.SetProperty( Actor::Property::SIZE, windowSize );
 194     window.Add( background );
 195
 196     mDesiredBox = Toolkit::ImageView::New( BORDER_IMAGE );
 197     background.Add( mDesiredBox );
 198
 199     mDesiredBox.SetProperty( Actor::Property::SIZE, windowSize * mImageWindowScale );
 200     mDesiredBox.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER );
 201     mDesiredBox.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER );
 202
 203     // Initialize the actor
 204     mImageView = Toolkit::ImageView::New( IMAGE_PATHS[ 0 ] );
 205
 206     // Reposition the actor
 207     mImageView.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER );
 208     mImageView.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER );
 209
 210     // Display the actor on the window
 211     mDesiredBox.Add( mImageView );
 212
 213     mImageView.SetProperty( Actor::Property::SIZE, windowSize * mImageWindowScale );
 214
 215     // Setup the pinch detector for scaling the desired image load dimensions:
 216     mPinchDetector = PinchGestureDetector::New();
 217     mPinchDetector.Attach( mImageView );
 218     mPinchDetector.DetectedSignal().Connect( this, &ImageScalingAndFilteringController::OnPinch );
 219
 220     mGrabCorner = Toolkit::ImageView::New( RESIZE_HANDLE_IMAGE );
 221     mGrabCorner.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::ALL_DIMENSIONS );
 222     mGrabCorner.SetProperty( Dali::Actor::Property::NAME, "GrabCorner" );
 223     mGrabCorner.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::BOTTOM_RIGHT );
 224     mGrabCorner.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::BOTTOM_RIGHT );
 225     mGrabCorner.SetProperty( Actor::Property::POSITION, Vector2( -BORDER_WIDTH, -BORDER_WIDTH ));
 226     mGrabCorner.SetProperty( Actor::Property::OPACITY, 0.6f );
 227
 228     Layer grabCornerLayer = Layer::New();
 229     grabCornerLayer.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::BOTTOM_RIGHT );
 230     grabCornerLayer.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::BOTTOM_RIGHT );
 231     grabCornerLayer.Add( mGrabCorner );
 232     mDesiredBox.Add( grabCornerLayer );
 233
 234     mPanGestureDetector = PanGestureDetector::New();
 235     mPanGestureDetector.Attach( mGrabCorner );
 236     mPanGestureDetector.DetectedSignal().Connect( this, &ImageScalingAndFilteringController::OnPan );
 237
 238     // Tie-in input event handlers:
 239     window.KeyEventSignal().Connect( this, &ImageScalingAndFilteringController::OnKeyEvent );
 240
 241     CreateControls();
 242
 243     ResizeImage();
 244   }
 245
 246   /**
 247    * Create the GUI controls which float above the scene
 248    */
 249   void CreateControls()
 250   {
 251     Window window = mApplication.GetWindow();
 252     Vector2 windowSize = window.GetSize();
 253
 254     Dali::Layer controlsLayer = Dali::Layer::New();
 255     controlsLayer.SetResizePolicy( ResizePolicy::SIZE_RELATIVE_TO_PARENT, Dimension::ALL_DIMENSIONS );
 256     controlsLayer.SetProperty( Actor::Property::SIZE_MODE_FACTOR, Vector3( 1.0f, 1.0f, 1.0f ) );
 257     controlsLayer.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT);
 258     controlsLayer.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::TOP_LEFT);
 259     window.Add( controlsLayer );
 260
 261     // Back and next image buttons in corners of window:
 262     unsigned int playWidth = std::min( windowSize.x * (1 / 5.0f), 58.0f );
 263     Toolkit::ImageView imagePrevious = Toolkit::ImageView::New( DALI_ICON_PLAY, ImageDimensions( playWidth, playWidth ) );
 264
 265     // Last image button:
 266     imagePrevious.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT );
 267     imagePrevious.RotateBy( Radian(3.14159265358979323846f), Vector3( 0, 1.0f, 0 ) );
 268     imagePrevious.SetProperty( Actor::Property::POSITION_Y,  playWidth * 0.5f );
 269     imagePrevious.SetProperty( Actor::Property::POSITION_X,  playWidth + playWidth * 0.5f );
 270     imagePrevious.SetProperty( Actor::Property::OPACITY, 0.6f );
 271     controlsLayer.Add( imagePrevious );
 272     imagePrevious.SetProperty( Dali::Actor::Property::NAME, PREVIOUS_BUTTON_ID );
 273     imagePrevious.TouchedSignal().Connect( this, &ImageScalingAndFilteringController::OnControlTouched );
 274
 275     // Next image button:
 276     Toolkit::ImageView imageNext = Toolkit::ImageView::New( DALI_ICON_PLAY, ImageDimensions( playWidth, playWidth ) );
 277     imageNext.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_RIGHT );
 278     imageNext.SetProperty( Actor::Property::POSITION_Y,  playWidth * 0.5f );
 279     imageNext.SetProperty( Actor::Property::POSITION_X,  windowSize.x - playWidth * 0.5f );
 280     imageNext.SetProperty( Actor::Property::OPACITY, 0.6f );
 281     controlsLayer.Add( imageNext );
 282     imageNext.SetProperty( Dali::Actor::Property::NAME, NEXT_BUTTON_ID );
 283     imageNext.TouchedSignal().Connect( this, &ImageScalingAndFilteringController::OnControlTouched );
 284
 285     // Buttons to popup selectors for fitting and sampling modes:
 286
 287     // Wrapper table to hold two buttons side by side:
 288     Toolkit::TableView modesGroupBackground = Toolkit::TableView::New( 1, 2 );
 289     modesGroupBackground.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
 290     modesGroupBackground.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
 291     modesGroupBackground.SetBackgroundColor( BACKGROUND_COLOUR );
 292     modesGroupBackground.SetCellPadding( Size( MARGIN_SIZE * 0.5f, MARGIN_SIZE ) );
 293     modesGroupBackground.SetFitHeight( 0 );
 294
 295     modesGroupBackground.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::BOTTOM_LEFT );
 296     modesGroupBackground.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::BOTTOM_LEFT );
 297     modesGroupBackground.SetProperty( Actor::Property::POSITION, Vector2( 0.0f, 0.0f ));
 298
 299     controlsLayer.Add( modesGroupBackground );
 300
 301     {
 302       // Vertical table to hold label and button:
 303       Toolkit::TableView fittingModeGroup = Toolkit::TableView::New( 2, 1 );
 304       fittingModeGroup.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
 305       fittingModeGroup.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
 306       fittingModeGroup.SetBackgroundColor( BACKGROUND_COLOUR );
 307       fittingModeGroup.SetCellPadding( Size( MARGIN_SIZE * 0.5f, MARGIN_SIZE * 0.5f ) );
 308       fittingModeGroup.SetFitHeight( 0 );
 309       fittingModeGroup.SetFitHeight( 1 );
 310
 311       TextLabel label = TextLabel::New( "Image fitting mode:" );
 312       label.SetStyleName( STYLE_LABEL_TEXT );
 313       fittingModeGroup.Add( label );
 314
 315       Toolkit::PushButton button = CreateButton( FITTING_BUTTON_ID, StringFromScalingMode( mFittingMode ) );
 316       fittingModeGroup.Add( button );
 317       mFittingModeButton = button;
 318
 319       modesGroupBackground.Add( fittingModeGroup );
 320     }
 321
 322     {
 323       // Vertical table to hold label and button:
 324       Toolkit::TableView samplingModeGroup = Toolkit::TableView::New( 2, 1 );
 325       samplingModeGroup.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
 326       samplingModeGroup.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
 327       samplingModeGroup.SetBackgroundColor( BACKGROUND_COLOUR );
 328       samplingModeGroup.SetCellPadding( Size( MARGIN_SIZE * 0.5f, MARGIN_SIZE * 0.5f ) );
 329       samplingModeGroup.SetFitHeight( 0 );
 330       samplingModeGroup.SetFitHeight( 1 );
 331
 332       TextLabel label = TextLabel::New( "Image sampling mode:" );
 333       label.SetStyleName( STYLE_LABEL_TEXT );
 334       samplingModeGroup.Add( label );
 335
 336       Toolkit::PushButton button = CreateButton( SAMPLING_BUTTON_ID, StringFromFilterMode( mSamplingMode ) );
 337       samplingModeGroup.Add( button );
 338       mSamplingModeButton = button;
 339
 340       modesGroupBackground.Add( samplingModeGroup );
 341     }
 342   }
 343
 344   Toolkit::PushButton CreateButton( const char * id, const char * label )
 345   {
 346     Toolkit::PushButton button = Toolkit::PushButton::New();
 347     button.SetStyleName( STYLE_BUTTON_TEXT );
 348     button.SetProperty( Dali::Actor::Property::NAME, id );
 349     button.SetProperty( Toolkit::Button::Property::LABEL, label );
 350     button.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
 351     button.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
 352     button.ClickedSignal().Connect( this, &ImageScalingAndFilteringController::OnButtonClicked );
 353     return button;
 354   }
 355
 356   Toolkit::Popup CreatePopup()
 357   {
 358     Window window = mApplication.GetWindow();
 359     const float POPUP_WIDTH_DP = window.GetSize().GetWidth() * 0.75f;
 360
 361     Toolkit::Popup popup = Toolkit::Popup::New();
 362     popup.SetProperty( Dali::Actor::Property::NAME, "POPUP" );
 363     popup.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER );
 364     popup.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER );
 365     popup.SetProperty( Actor::Property::SIZE, Vector2( POPUP_WIDTH_DP, 0.0f ) );
 366
 367     popup.OutsideTouchedSignal().Connect( this, &ImageScalingAndFilteringController::OnPopupOutsideTouched );
 368
 369     return popup;
 370   }
 371
 372   Toolkit::PushButton CreatePopupButton( Actor parent, const char* id )
 373   {
 374     Toolkit::PushButton button = Toolkit::PushButton::New();
 375     button.SetProperty( Dali::Actor::Property::NAME, id );
 376     button.SetProperty( Toolkit::Button::Property::LABEL, id );
 377
 378     button.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT );
 379     button.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::BOTTOM_LEFT );
 380     button.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
 381     button.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
 382
 383     button.ClickedSignal().Connect( this, &ImageScalingAndFilteringController::OnButtonClicked );
 384
 385     parent.Add( button );
 386     return button;
 387   }
 388
 389   bool OnButtonClicked( Toolkit::Button button )
 390   {
 391     if( button.GetProperty< std::string >( Dali::Actor::Property::NAME ) == FITTING_BUTTON_ID )
 392     {
 393       mPopup = CreatePopup();
 394
 395       // Four-row table to hold buttons:
 396       Toolkit::TableView fittingModes = Toolkit::TableView::New( 4, 1 );
 397       fittingModes.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
 398       fittingModes.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
 399       fittingModes.SetCellPadding( Size( MARGIN_SIZE, MARGIN_SIZE * 0.5 ) );
 400       fittingModes.SetFitHeight( 0 );
 401       fittingModes.SetFitHeight( 1 );
 402       fittingModes.SetFitHeight( 2 );
 403       fittingModes.SetFitHeight( 3 );
 404
 405       CreatePopupButton( fittingModes, StringFromScalingMode( FittingMode::SCALE_TO_FILL ) );
 406       CreatePopupButton( fittingModes, StringFromScalingMode( FittingMode::SHRINK_TO_FIT ) );
 407       CreatePopupButton( fittingModes, StringFromScalingMode( FittingMode::FIT_WIDTH ) );
 408       CreatePopupButton( fittingModes, StringFromScalingMode( FittingMode::FIT_HEIGHT ) );
 409
 410       mPopup.SetContent( fittingModes );
 411       mApplication.GetWindow().Add( mPopup );
 412       mPopup.SetDisplayState( Toolkit::Popup::SHOWN );
 413     }
 414     else if( button.GetProperty< std::string >( Dali::Actor::Property::NAME ) == SAMPLING_BUTTON_ID )
 415     {
 416       mPopup = CreatePopup();
 417
 418       // Table to hold buttons for each sampling mode:
 419       Toolkit::TableView samplingModes = Toolkit::TableView::New( 6, 1 );
 420       samplingModes.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
 421       samplingModes.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
 422       samplingModes.SetCellPadding( Size( MARGIN_SIZE, MARGIN_SIZE * 0.5 ) );
 423       samplingModes.SetFitHeight( 0 );
 424       samplingModes.SetFitHeight( 1 );
 425       samplingModes.SetFitHeight( 2 );
 426       samplingModes.SetFitHeight( 3 );
 427       samplingModes.SetFitHeight( 4 );
 428       samplingModes.SetFitHeight( 5 );
 429
 430       CreatePopupButton( samplingModes, StringFromFilterMode( SamplingMode::NEAREST ) );
 431       CreatePopupButton( samplingModes, StringFromFilterMode( SamplingMode::LINEAR ) );
 432       CreatePopupButton( samplingModes, StringFromFilterMode( SamplingMode::BOX ) );
 433       CreatePopupButton( samplingModes, StringFromFilterMode( SamplingMode::BOX_THEN_NEAREST ) );
 434       CreatePopupButton( samplingModes, StringFromFilterMode( SamplingMode::BOX_THEN_LINEAR ) );
 435       CreatePopupButton( samplingModes, StringFromFilterMode( SamplingMode::NO_FILTER ) );
 436
 437       mPopup.SetContent( samplingModes );
 438       mApplication.GetWindow().Add( mPopup );
 439       mPopup.SetDisplayState( Toolkit::Popup::SHOWN );
 440     }
 441     else if( CheckFittingModeButton( button, FittingMode::SCALE_TO_FILL) ||
 442              CheckFittingModeButton( button, FittingMode::SHRINK_TO_FIT) ||
 443              CheckFittingModeButton( button, FittingMode::FIT_WIDTH) ||
 444              CheckFittingModeButton( button, FittingMode::FIT_HEIGHT) )
 445     {
 446     }
 447     else if( CheckSamplingModeButton( button, SamplingMode::NEAREST ) ||
 448              CheckSamplingModeButton( button, SamplingMode::LINEAR ) ||
 449              CheckSamplingModeButton( button, SamplingMode::BOX ) ||
 450              CheckSamplingModeButton( button, SamplingMode::LINEAR ) ||
 451              CheckSamplingModeButton( button, SamplingMode::BOX_THEN_NEAREST ) ||
 452              CheckSamplingModeButton( button, SamplingMode::BOX_THEN_LINEAR ) ||
 453              CheckSamplingModeButton( button, SamplingMode::NO_FILTER ) )
 454     {
 455     }
 456     return true;
 457   }
 458
 459   bool CheckFittingModeButton( Actor &button, FittingMode::Type mode )
 460   {
 461     const char * const modeName = StringFromScalingMode( mode );
 462     if( button.GetProperty< std::string >( Dali::Actor::Property::NAME ) == modeName )
 463     {
 464       mFittingMode = mode;
 465       mFittingModeButton.SetProperty( Toolkit::Button::Property::LABEL, modeName );
 466       ResizeImage();
 467       mPopup.SetDisplayState( Toolkit::Popup::HIDDEN );
 468       mPopup.Reset();
 469       return true;
 470     }
 471     return false;
 472   }
 473
 474   bool CheckSamplingModeButton( Actor &button, SamplingMode::Type mode )
 475   {
 476     const char * const modeName = StringFromFilterMode( mode );
 477     if( button.GetProperty< std::string >( Dali::Actor::Property::NAME ) == modeName )
 478     {
 479       mSamplingMode = mode;
 480       mSamplingModeButton.SetProperty( Toolkit::Button::Property::LABEL, modeName );
 481       ResizeImage();
 482       mPopup.SetDisplayState( Toolkit::Popup::HIDDEN );
 483       mPopup.Reset();
 484       return true;
 485     }
 486     return false;
 487   }
 488
 489   void OnPopupOutsideTouched()
 490   {
 491     if( mPopup )
 492     {
 493       mPopup.SetDisplayState( Toolkit::Popup::HIDDEN );
 494       mPopup.Reset();
 495     }
 496   }
 497
 498   bool OnControlTouched( Actor actor, const TouchEvent& event )
 499   {
 500     if(event.GetPointCount() > 0)
 501     {
 502       switch( event.GetState( 0 ) )
 503       {
 504         case PointState::UP:
 505         {
 506           const std::string & name = actor.GetProperty< std::string >( Dali::Actor::Property::NAME );
 507           if( name == NEXT_BUTTON_ID )
 508           {
 509             mCurrentPath = mCurrentPath + 1;
 510             mCurrentPath = mCurrentPath <  NUM_IMAGE_PATHS ? mCurrentPath : 0;
 511             ResizeImage();
 512           }
 513           else if( name == PREVIOUS_BUTTON_ID )
 514           {
 515             mCurrentPath = mCurrentPath - 1;
 516             mCurrentPath = mCurrentPath >= 0 ? mCurrentPath : NUM_IMAGE_PATHS - 1;
 517             ResizeImage();
 518           }
 519           break;
 520         }
 521         default:
 522         {
 523           break;
 524         }
 525       } // end switch
 526     }
 527
 528     return false;
 529   }
 530
 531   void OnPinch( Actor actor, const PinchGesture& pinch )
 532   {
 533     if( pinch.GetState() == Gesture::Started )
 534     {
 535       mLastPinchScale = pinch.GetScale();
 536     }
 537     const float scale = pinch.GetScale();
 538
 539     if( ! Equals( scale, mLastPinchScale ) )
 540     {
 541       if ( scale < mLastPinchScale )
 542       {
 543         mImageWindowScale.x = std::max( 0.05f, mImageWindowScale.x * 0.9f );
 544         mImageWindowScale.y = std::max( 0.05f, mImageWindowScale.y * 0.9f );
 545       }
 546       else
 547       {
 548         mImageWindowScale.x = std::max( 0.05f, std::min( 1.0f, mImageWindowScale.x * 1.1f ) );
 549         mImageWindowScale.y = std::max( 0.05f, std::min( 1.0f, mImageWindowScale.y * 1.1f ) );
 550       }
 551       ResizeImage();
 552     }
 553     mLastPinchScale = scale;
 554   }
 555
 556   void OnPan( Actor actor, const PanGesture& gesture )
 557   {
 558     Window window = mApplication.GetWindow();
 559     Vector2 windowSize = window.GetSize();
 560     const Vector2& displacement = gesture.GetDisplacement();
 561
 562     // 1.0f and 0.75f are the maximum size caps of the resized image, as a factor of window-size.
 563     mImageWindowScale.x = std::max( 0.05f, std::min( 0.95f,  mImageWindowScale.x + ( displacement.x * 2.0f / windowSize.width ) ) );
 564     mImageWindowScale.y = std::max( 0.05f, std::min( 0.70f, mImageWindowScale.y + ( displacement.y * 2.0f / windowSize.height ) ) );
 565
 566     ResizeImage();
 567   }
 568
 569   void OnKeyEvent(const KeyEvent& event)
 570   {
 571     if( event.GetState() == KeyEvent::DOWN )
 572     {
 573       if( IsKey( event, Dali::DALI_KEY_ESCAPE ) || IsKey( event, Dali::DALI_KEY_BACK ) )
 574       {
 575         if( mPopup && mPopup.GetCurrentProperty< bool >( Actor::Property::VISIBLE ) )
 576         {
 577           mPopup.SetDisplayState( Toolkit::Popup::HIDDEN );
 578           mPopup.Reset();
 579         }
 580         else
 581         {
 582           mApplication.Quit();
 583         }
 584       }
 585       else if ( event.GetKeyName() == "Right" )
 586       {
 587         mImageWindowScale.x = std::max( 0.05f, std::min( 1.0f, mImageWindowScale.x * 1.1f ) );
 588       }
 589       else if ( event.GetKeyName() == "Left" )
 590       {
 591         mImageWindowScale.x = std::max( 0.05f, mImageWindowScale.x * 0.9f );
 592       }
 593       else if ( event.GetKeyName() == "Up" )
 594       {
 595         mImageWindowScale.y = std::max( 0.05f, std::min( 1.0f, mImageWindowScale.y * 1.1f ) );
 596       }
 597       else if ( event.GetKeyName() == "Down" )
 598       {
 599         mImageWindowScale.y = std::max( 0.05f, mImageWindowScale.y * 0.9f );
 600       }
 601       else if ( event.GetKeyName() == "o" )
 602       {
 603         mImageWindowScale.x = std::max( 0.05f, mImageWindowScale.x * 0.9f );
 604         mImageWindowScale.y = std::max( 0.05f, mImageWindowScale.y * 0.9f );
 605       }
 606       else if ( event.GetKeyName() == "p" )
 607       {
 608         mImageWindowScale.x = std::max( 0.05f, std::min( 1.0f, mImageWindowScale.x * 1.1f ) );
 609         mImageWindowScale.y = std::max( 0.05f, std::min( 1.0f, mImageWindowScale.y * 1.1f ) );
 610       }
 611       else if ( event.GetKeyName() == "n" )
 612       {
 613         mCurrentPath = mCurrentPath + 1;
 614         mCurrentPath = mCurrentPath <  NUM_IMAGE_PATHS ? mCurrentPath : 0;
 615       }
 616       else if ( event.GetKeyName() == "b" )
 617       {
 618         mCurrentPath = mCurrentPath - 1;
 619         mCurrentPath = mCurrentPath >= 0 ? mCurrentPath : NUM_IMAGE_PATHS - 1;
 620       }
 621       // Cycle filter and scaling modes:
 622       else if ( event.GetKeyName() == "f" )
 623       {
 624         mSamplingMode = NextFilterMode( mSamplingMode );
 625         mSamplingModeButton.SetProperty( Toolkit::Button::Property::LABEL, StringFromFilterMode( mSamplingMode ) );
 626       }
 627       // Cycle filter and scaling modes:
 628       else if ( event.GetKeyName() == "s" )
 629       {
 630         mFittingMode = NextScalingMode( mFittingMode );
 631         mFittingModeButton.SetProperty( Toolkit::Button::Property::LABEL, StringFromScalingMode( mFittingMode ) );
 632       }
 633       else
 634       {
 635         return;
 636       }
 637
 638       ResizeImage();
 639     }
 640   }
 641
 642 private:
 643
 644   void LoadImage()
 645   {
 646     mImageLoading = true;
 647
 648     const char * const path = IMAGE_PATHS[ mCurrentPath ];
 649     Window window = mApplication.GetWindow();
 650     Size imageSize = Vector2(window.GetSize()) * mImageWindowScale;
 651     mImageView.SetProperty( Actor::Property::SIZE, imageSize );
 652
 653     Property::Map map;
 654     map[Toolkit::ImageVisual::Property::URL] = path;
 655     map[Toolkit::ImageVisual::Property::DESIRED_WIDTH] = imageSize.x;
 656     map[Toolkit::ImageVisual::Property::DESIRED_HEIGHT] = imageSize.y;
 657     map[Toolkit::ImageVisual::Property::FITTING_MODE] = mFittingMode;
 658     map[Toolkit::ImageVisual::Property::SAMPLING_MODE] = mSamplingMode;
 659
 660     mImageView.SetProperty( Toolkit::ImageView::Property::IMAGE, map );
 661
 662   }
 663
 664   void ResizeImage()
 665   {
 666
 667     Window window = mApplication.GetWindow();
 668     Vector2 windowSize = window.GetSize();
 669     Size imageSize = windowSize * mImageWindowScale;
 670
 671     LoadImage();
 672
 673     // Border size needs to be modified to take into account the width of the frame.
 674     Vector2 borderScale( ( imageSize + Vector2( BORDER_WIDTH * 2.0f, BORDER_WIDTH * 2.0f ) ) / windowSize );
 675     mDesiredBox.SetProperty( Actor::Property::SIZE, windowSize * borderScale );
 676   }
 677
 678 private:
 679   Application&  mApplication;
 680   Toolkit::ImageView mDesiredBox; //< Background rectangle to show requested image size.
 681   Toolkit::PushButton mFittingModeButton;
 682   Toolkit::PushButton mSamplingModeButton;
 683   Toolkit::Popup mPopup;
 684   PinchGestureDetector mPinchDetector;
 685   float mLastPinchScale;
 686   Toolkit::ImageView mGrabCorner;
 687   PanGestureDetector mPanGestureDetector;
 688   Toolkit::ImageView mImageView;
 689   Vector2 mImageWindowScale;
 690   int mCurrentPath;
 691   FittingMode::Type mFittingMode;
 692   SamplingMode::Type mSamplingMode;
 693   bool mImageLoading;
 694   bool mQueuedImageLoad;
 695
 696 };
 697
 698 int DALI_EXPORT_API main( int argc, char **argv )
 699 {
 700   Application application = Application::New( &argc, &argv, DEMO_THEME_PATH );
 701   ImageScalingAndFilteringController test( application );
 702   application.MainLoop();
 703   return 0;
 704 }