2 * Copyright (c) 2017 Samsung Electronics Co., Ltd.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 * @file image-scaling-irregular-grid-example.cpp
20 * @brief Demonstrates how to use image scaling modes when loading images.
22 * If an image is going to be drawn on-screen at a lower resolution than it is
23 * stored at on-disk, the scaling feature of the image loader can be used to
24 * reduce the image to save memory, improve performance, and potentially display
25 * a better small version of the image than if the default size were loaded.
27 * The functions CreateImage and CreateImageView below show how to build an
28 * image using a scaling mode to have %Dali resize it during loading.
30 * This demo defaults to the SCALE_TO_FILL mode of ImageAttributes which makes
31 * sure that every pixel in the loaded image is filled with a source colour
32 * from the image's central region while losing the minimum number of pixels
34 * It is the best option for producing thumbnails of input images that have
35 * diverse aspect ratios.
37 * The other four scaling modes of dali can be cycled-through for the whole
38 * grid using the button in the top-right of the toolbar.
39 * A single image can be cycled by clicking the image directly.
41 * @see CreateImage CreateImageView
47 #include <dali-toolkit/dali-toolkit.h>
49 #include <dali-toolkit/devel-api/controls/control-devel.h>
52 #include "grid-flags.h"
53 #include "shared/view.h"
56 using namespace Dali::Toolkit;
57 using namespace Dali::Demo;
62 /** Controls the output of application logging. */
63 //#define DEBUG_PRINT_DIAGNOSTICS;
65 const char* BACKGROUND_IMAGE( DEMO_IMAGE_DIR "background-gradient.jpg" );
66 const char* TOOLBAR_IMAGE( DEMO_IMAGE_DIR "top-bar.png" );
67 const char* APPLICATION_TITLE( "Image Scaling Modes" );
68 const char* TOGGLE_SCALING_IMAGE( DEMO_IMAGE_DIR "icon-change.png" );
69 const char* TOGGLE_SCALING_IMAGE_SELECTED( DEMO_IMAGE_DIR "icon-change-selected.png" );
71 /** The width of the grid in whole grid cells. */
72 const unsigned GRID_WIDTH = 9;
73 /** Limit the grid to be no higher than this in units of a cell. */
74 const unsigned GRID_MAX_HEIGHT = 600;
76 /** The space between the edge of a grid cell and the image embedded within it. */
77 const unsigned GRID_CELL_PADDING = 4;
79 /** The aspect ratio of cells in the image grid. */
80 const float CELL_ASPECT_RATIO = 1.33333333333333333333f;
82 const Dali::FittingMode::Type DEFAULT_SCALING_MODE = Dali::FittingMode::SCALE_TO_FILL;
84 /** The number of times to spin an image on touching, each spin taking a second.*/
85 const float SPIN_DURATION = 1.0f;
87 /** The target image sizes in grid cells. */
88 const Vector2 IMAGE_SIZES[] = {
96 // Large, tall configuration:
97 Vector2( GRID_WIDTH / 2, GRID_WIDTH + GRID_WIDTH / 2 ),
98 // Large, square-ish images to show shrink-to-fit well with wide and tall images:
99 Vector2( GRID_WIDTH / 2, GRID_WIDTH / 2.0f * CELL_ASPECT_RATIO + 0.5f ),
100 Vector2( GRID_WIDTH - 2, (GRID_WIDTH - 2) * CELL_ASPECT_RATIO + 0.5f ),
102 const unsigned NUM_IMAGE_SIZES = sizeof(IMAGE_SIZES) / sizeof(IMAGE_SIZES[0]);
104 /** Images to load into the grid. These are mostly large and non-square to
105 * show the scaling. */
106 const char* IMAGE_PATHS[] = {
108 DEMO_IMAGE_DIR "dali-logo.png",
109 DEMO_IMAGE_DIR "com.samsung.dali-demo.ico",
110 DEMO_IMAGE_DIR "square_primitive_shapes.bmp",
111 DEMO_IMAGE_DIR "gallery-large-14.wbmp",
113 // Images that show aspect ratio changes clearly in primitive shapes:
115 DEMO_IMAGE_DIR "portrait_screen_primitive_shapes.gif",
116 DEMO_IMAGE_DIR "landscape_screen_primitive_shapes.gif",
118 // Images from other demos that are tall, wide or just large:
120 DEMO_IMAGE_DIR "gallery-large-1.jpg",
121 DEMO_IMAGE_DIR "gallery-large-2.jpg",
122 DEMO_IMAGE_DIR "gallery-large-3.jpg",
123 DEMO_IMAGE_DIR "gallery-large-4.jpg",
124 DEMO_IMAGE_DIR "gallery-large-5.jpg",
125 DEMO_IMAGE_DIR "gallery-large-6.jpg",
126 DEMO_IMAGE_DIR "gallery-large-7.jpg",
127 DEMO_IMAGE_DIR "gallery-large-8.jpg",
128 DEMO_IMAGE_DIR "gallery-large-9.jpg",
129 DEMO_IMAGE_DIR "gallery-large-10.jpg",
130 DEMO_IMAGE_DIR "gallery-large-11.jpg",
131 DEMO_IMAGE_DIR "gallery-large-12.jpg",
132 DEMO_IMAGE_DIR "gallery-large-13.jpg",
133 DEMO_IMAGE_DIR "gallery-large-14.jpg",
134 DEMO_IMAGE_DIR "gallery-large-15.jpg",
135 DEMO_IMAGE_DIR "gallery-large-16.jpg",
136 DEMO_IMAGE_DIR "gallery-large-17.jpg",
137 DEMO_IMAGE_DIR "gallery-large-18.jpg",
138 DEMO_IMAGE_DIR "gallery-large-19.jpg",
139 DEMO_IMAGE_DIR "gallery-large-20.jpg",
140 DEMO_IMAGE_DIR "gallery-large-21.jpg",
142 DEMO_IMAGE_DIR "background-1.jpg",
143 DEMO_IMAGE_DIR "background-2.jpg",
144 DEMO_IMAGE_DIR "background-3.jpg",
145 DEMO_IMAGE_DIR "background-4.jpg",
146 DEMO_IMAGE_DIR "background-5.jpg",
147 DEMO_IMAGE_DIR "background-blocks.jpg",
148 DEMO_IMAGE_DIR "background-magnifier.jpg",
150 DEMO_IMAGE_DIR "background-1.jpg",
151 DEMO_IMAGE_DIR "background-2.jpg",
152 DEMO_IMAGE_DIR "background-3.jpg",
153 DEMO_IMAGE_DIR "background-4.jpg",
154 DEMO_IMAGE_DIR "background-5.jpg",
155 DEMO_IMAGE_DIR "background-blocks.jpg",
156 DEMO_IMAGE_DIR "background-magnifier.jpg",
158 DEMO_IMAGE_DIR "book-landscape-cover-back.jpg",
159 DEMO_IMAGE_DIR "book-landscape-cover.jpg",
160 DEMO_IMAGE_DIR "book-landscape-p1.jpg",
161 DEMO_IMAGE_DIR "book-landscape-p2.jpg",
163 DEMO_IMAGE_DIR "book-portrait-cover.jpg",
164 DEMO_IMAGE_DIR "book-portrait-p1.jpg",
165 DEMO_IMAGE_DIR "book-portrait-p2.jpg",
168 const unsigned NUM_IMAGE_PATHS = sizeof(IMAGE_PATHS) / sizeof(IMAGE_PATHS[0]) - 1u;
169 const unsigned int INITIAL_IMAGES_TO_LOAD = 10;
173 * Creates an ImageView
175 * @param[in] filename The path of the image.
176 * @param[in] width The width of the image in pixels.
177 * @param[in] height The height of the image in pixels.
178 * @param[in] fittingMode The mode to use when scaling the image to fit the desired dimensions.
180 ImageView CreateImageView(const std::string& filename, int width, int height, Dali::FittingMode::Type fittingMode )
183 ImageView imageView = ImageView::New();
186 map[Toolkit::ImageVisual::Property::URL] = filename;
187 map[Toolkit::ImageVisual::Property::DESIRED_WIDTH] = width;
188 map[Toolkit::ImageVisual::Property::DESIRED_HEIGHT] = height;
189 map[Toolkit::ImageVisual::Property::FITTING_MODE] = fittingMode;
190 imageView.SetProperty( Toolkit::ImageView::Property::IMAGE, map );
192 imageView.SetName( filename );
193 imageView.SetParentOrigin(ParentOrigin::CENTER);
194 imageView.SetAnchorPoint(AnchorPoint::CENTER);
199 /** Cycle the scaling mode options. */
200 Dali::FittingMode::Type NextMode( const Dali::FittingMode::Type oldMode )
202 Dali::FittingMode::Type newMode = FittingMode::SHRINK_TO_FIT;
205 case FittingMode::SHRINK_TO_FIT:
206 newMode = FittingMode::SCALE_TO_FILL;
208 case FittingMode::SCALE_TO_FILL:
209 newMode = FittingMode::FIT_WIDTH;
211 case FittingMode::FIT_WIDTH:
212 newMode = FittingMode::FIT_HEIGHT;
214 case FittingMode::FIT_HEIGHT:
215 newMode = FittingMode::SHRINK_TO_FIT;
222 * Bundle an image path with the rectangle to pack it into.
224 struct ImageConfiguration
226 ImageConfiguration( const char * const path, const Vector2 dimensions ) :
228 dimensions( dimensions )
235 * Post-layout image data.
237 struct PositionedImage
239 PositionedImage(ImageConfiguration& configuration, unsigned cellX, unsigned cellY, Vector2 imageGridDims) :
240 configuration( configuration ),
243 imageGridDims( imageGridDims )
246 ImageConfiguration configuration;
249 Vector2 imageGridDims;
255 * @brief The main class of the demo.
257 class ImageScalingIrregularGridController : public ConnectionTracker
261 ImageScalingIrregularGridController( Application& application )
262 : mApplication( application ),
266 std::cout << "ImageScalingIrregularGridController::ImageScalingIrregularGridController" << std::endl;
268 // Connect to the Application's Init signal
269 mApplication.InitSignal().Connect( this, &ImageScalingIrregularGridController::Create );
272 ~ImageScalingIrregularGridController()
274 // Nothing to do here.
278 * Called everytime an ImageView has loaded it's image
280 void ResourceReadySignal( Toolkit::Control control )
283 // To allow fast startup, we only place a small number of ImageViews on stage first
284 if ( mImagesLoaded == INITIAL_IMAGES_TO_LOAD )
286 // Adding the ImageViews to the stage will trigger loading of the Images
287 mGridActor.Add( mOffStageImageViews );
293 * One-time setup in response to Application InitSignal.
295 void Create( Application& application )
297 std::cout << "ImageScalingIrregularGridController::Create" << std::endl;
299 // Get a handle to the stage:
300 Stage stage = Stage::GetCurrent();
302 // Connect to input event signals:
303 stage.KeyEventSignal().Connect(this, &ImageScalingIrregularGridController::OnKeyEvent);
305 // Hide the indicator bar
306 mApplication.GetWindow().ShowIndicator(Dali::Window::INVISIBLE);
308 // Create a default view with a default tool bar:
309 mContentLayer = DemoHelper::CreateView( mApplication,
316 // Create an image scaling toggle button. (right of toolbar)
317 Toolkit::PushButton toggleScalingButton = Toolkit::PushButton::New();
318 toggleScalingButton.SetUnselectedImage( TOGGLE_SCALING_IMAGE );
319 toggleScalingButton.SetSelectedImage( TOGGLE_SCALING_IMAGE_SELECTED );
320 toggleScalingButton.ClickedSignal().Connect( this, &ImageScalingIrregularGridController::OnToggleScalingTouched );
321 mToolBar.AddControl( toggleScalingButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HorizontalRight, DemoHelper::DEFAULT_MODE_SWITCH_PADDING );
323 SetTitle( APPLICATION_TITLE );
325 mOffStageImageViews = Actor::New();
326 mOffStageImageViews.SetAnchorPoint( AnchorPoint::CENTER );
327 mOffStageImageViews.SetParentOrigin(ParentOrigin::CENTER);
328 mOffStageImageViews.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
330 // Build the main content of the widow:
331 PopulateContentLayer( DEFAULT_SCALING_MODE );
335 * Build the main part of the application's view.
337 void PopulateContentLayer( const Dali::FittingMode::Type fittingMode )
339 Stage stage = Stage::GetCurrent();
340 Vector2 stageSize = stage.GetSize();
343 Actor imageField = BuildImageField( stageSize.x, GRID_WIDTH, GRID_MAX_HEIGHT, fittingMode, fieldHeight );
345 mScrollView = ScrollView::New();
347 mScrollView.ScrollStartedSignal().Connect( this, &ImageScalingIrregularGridController::OnScrollStarted );
348 mScrollView.ScrollCompletedSignal().Connect( this, &ImageScalingIrregularGridController::OnScrollCompleted );
350 mScrollView.SetAnchorPoint(AnchorPoint::CENTER);
351 mScrollView.SetParentOrigin(ParentOrigin::CENTER);
353 mScrollView.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
355 mScrollView.SetAxisAutoLock( true );
356 mScrollView.SetAxisAutoLockGradient( 1.0f );
358 // Restrict scrolling to mostly vertical only, but with some horizontal wiggle-room:
360 RulerPtr rulerX = new FixedRuler( stageSize.width ); //< Pull the view back to the grid's centre-line when touch is release using a snapping ruler.
361 rulerX->SetDomain( RulerDomain( stageSize.width * -0.125f, stageSize.width * 1.125f ) ); //< Scroll slightly left/right of image field.
362 mScrollView.SetRulerX ( rulerX );
364 RulerPtr rulerY = new DefaultRuler(); //< Snap in multiples of a screen / stage height
365 rulerY->SetDomain( RulerDomain( - fieldHeight * 0.5f + stageSize.height * 0.5f - GRID_CELL_PADDING, fieldHeight * 0.5f + stageSize.height * 0.5f + GRID_CELL_PADDING ) );
366 mScrollView.SetRulerY ( rulerY );
368 mContentLayer.Add( mScrollView );
369 mScrollView.Add( imageField );
370 mGridActor = imageField;
372 // Create the scroll bar
373 mScrollBarVertical = ScrollBar::New(Toolkit::ScrollBar::Vertical);
374 mScrollBarVertical.SetParentOrigin(ParentOrigin::TOP_RIGHT);
375 mScrollBarVertical.SetAnchorPoint(AnchorPoint::TOP_RIGHT);
376 mScrollBarVertical.SetResizePolicy(Dali::ResizePolicy::FILL_TO_PARENT, Dali::Dimension::HEIGHT);
377 mScrollBarVertical.SetResizePolicy(Dali::ResizePolicy::FIT_TO_CHILDREN, Dali::Dimension::WIDTH);
378 mScrollView.Add(mScrollBarVertical);
380 mScrollBarHorizontal = ScrollBar::New(Toolkit::ScrollBar::Horizontal);
381 mScrollBarHorizontal.SetParentOrigin(ParentOrigin::BOTTOM_LEFT);
382 mScrollBarHorizontal.SetAnchorPoint(AnchorPoint::TOP_LEFT);
383 mScrollBarHorizontal.SetResizePolicy(Dali::ResizePolicy::FIT_TO_CHILDREN, Dali::Dimension::WIDTH);
384 mScrollBarHorizontal.SetOrientation(Quaternion(Radian( 1.5f * Math::PI ), Vector3::ZAXIS));
385 mScrollView.Add(mScrollBarHorizontal);
387 mScrollView.OnRelayoutSignal().Connect( this, &ImageScalingIrregularGridController::OnScrollViewRelayout );
389 // Scroll to top of grid so first images loaded are on-screen:
390 mScrollView.ScrollTo( Vector2( 0, -1000000 ) );
393 void OnScrollViewRelayout(Actor actor)
395 // Make the height of the horizontal scroll bar to be the same as the width of scroll view.
396 mScrollBarHorizontal.SetSize(Vector2(0.0f, mScrollView.GetRelayoutSize( Dimension::WIDTH) ));
400 * Build a field of images scaled into a variety of shapes from very wide,
401 * through square, to very tall. The images are direct children of the Dali::Actor
404 Actor BuildImageField( const float fieldWidth,
405 const unsigned gridWidth,
406 const unsigned maxGridHeight,
407 Dali::FittingMode::Type fittingMode,
408 float & outFieldHeight )
410 // Generate the list of image configurations to be fitted into the field:
412 std::vector<ImageConfiguration> configurations;
413 configurations.reserve( NUM_IMAGE_PATHS * NUM_IMAGE_SIZES );
414 for( unsigned imageIndex = 0; imageIndex < NUM_IMAGE_PATHS; ++imageIndex )
416 for( unsigned dimensionsIndex = 0; dimensionsIndex < NUM_IMAGE_SIZES; ++ dimensionsIndex )
418 configurations.push_back( ImageConfiguration( IMAGE_PATHS[imageIndex], IMAGE_SIZES[dimensionsIndex] ) );
421 // Stir-up the list to get some nice irregularity in the generated field:
422 std::random_shuffle( configurations.begin(), configurations.end() );
423 std::random_shuffle( configurations.begin(), configurations.end() );
425 // Place the images in the grid:
427 std::vector<ImageConfiguration>::iterator config, end;
428 GridFlags grid( gridWidth, maxGridHeight );
429 std::vector<PositionedImage> placedImages;
431 for( config = configurations.begin(), end = configurations.end(); config != end; ++config )
433 unsigned cellX, cellY;
434 Vector2 imageGridDims;
436 // Allocate a region of the grid for the image:
437 bool allocated = grid.AllocateRegion( config->dimensions, cellX, cellY, imageGridDims );
440 #ifdef DEBUG_PRINT_DIAGNOSTICS
441 fprintf( stderr, "Failed to allocate image in grid with dims (%f, %f) and path: %s.\n", config->dimensions.x, config->dimensions.y, config->path );
446 placedImages.push_back( PositionedImage( *config, cellX, cellY, imageGridDims ) );
448 DALI_ASSERT_DEBUG( grid.DebugCheckGridValid() && "Cells were set more than once, indicating erroneous overlap in placing images on the grid." );
449 const unsigned actualGridHeight = grid.GetHighestUsedRow() + 1;
451 // Take the images images in the grid and turn their logical locations into
452 // coordinates in a frame defined by a parent actor:
454 Actor gridActor = Actor::New();
455 gridActor.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
456 gridActor.SetParentOrigin( ParentOrigin::CENTER );
457 gridActor.SetAnchorPoint( AnchorPoint::CENTER );
459 // Work out the constants of the grid and cell dimensions and positions:
460 const float cellWidth = fieldWidth / gridWidth;
461 const float cellHeight = cellWidth / CELL_ASPECT_RATIO;
462 const Vector2 cellSize = Vector2( cellWidth, cellHeight );
463 outFieldHeight = actualGridHeight * cellHeight;
464 const Vector2 gridOrigin = Vector2( -fieldWidth * 0.5f, -outFieldHeight * 0.5 );
466 unsigned int count = 0;
467 // Build the image actors in their right locations in their parent's frame:
468 for( std::vector<PositionedImage>::const_iterator i = placedImages.begin(), end = placedImages.end(); i != end; ++i, ++count )
470 const PositionedImage& imageSource = *i;
471 const Vector2 imageSize = imageSource.imageGridDims * cellSize - Vector2( GRID_CELL_PADDING * 2, GRID_CELL_PADDING * 2 );
472 const Vector2 imageRegionCorner = gridOrigin + cellSize * Vector2( imageSource.cellX, imageSource.cellY );
473 const Vector2 imagePosition = imageRegionCorner + Vector2( GRID_CELL_PADDING , GRID_CELL_PADDING ) + imageSize * 0.5f;
475 ImageView image = CreateImageView( imageSource.configuration.path, imageSize.x, imageSize.y, fittingMode );
476 image.SetPosition( Vector3( imagePosition.x, imagePosition.y, 0 ) );
477 image.SetSize( imageSize );
478 image.TouchSignal().Connect( this, &ImageScalingIrregularGridController::OnTouchImage );
479 Toolkit::DevelControl::ResourceReadySignal( image).Connect( this, &ImageScalingIrregularGridController::ResourceReadySignal);
480 mFittingModes[image.GetId()] = fittingMode;
481 mResourceUrls[image.GetId()] = imageSource.configuration.path;
482 mSizes[image.GetId()] = imageSize;
483 if ( count < INITIAL_IMAGES_TO_LOAD )
485 gridActor.Add( image );
489 mOffStageImageViews.Add( image );
497 * Upon Touching an image (Release), change its scaling mode and make it spin, provided we're not scrolling.
498 * @param[in] actor The actor touched
499 * @param[in] event The Touch information.
501 bool OnTouchImage( Actor actor, const TouchData& event )
503 if( ( event.GetPointCount() > 0 ) && ( !mScrolling ) )
505 if( event.GetState( 0 ) == PointState::UP )
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 );
512 // Change the scaling mode:
513 const unsigned id = actor.GetId();
514 Dali::FittingMode::Type newMode = NextMode( mFittingModes[id] );
515 const Vector2 imageSize = mSizes[actor.GetId()];
517 ImageView imageView = ImageView::DownCast( actor );
521 map[Visual::Property::TYPE] = Visual::IMAGE;
522 map[ImageVisual::Property::URL] = mResourceUrls[id];
523 map[ImageVisual::Property::DESIRED_WIDTH] = imageSize.width + 0.5f;
524 map[ImageVisual::Property::DESIRED_HEIGHT] = imageSize.height + 0.5f;
525 map[ImageVisual::Property::FITTING_MODE] = newMode;
526 imageView.SetProperty( ImageView::Property::IMAGE, map );
529 mFittingModes[id] = newMode;
536 * Main key event handler.
537 * Quit on escape key.
539 void OnKeyEvent(const KeyEvent& event)
541 if( event.state == KeyEvent::Down )
543 if( IsKey( event, Dali::DALI_KEY_ESCAPE )
544 || IsKey( event, Dali::DALI_KEY_BACK ) )
552 * Signal handler, called when the 'Scaling' button has been touched.
554 * @param[in] button The button that was pressed.
556 bool OnToggleScalingTouched( Button button )
558 const unsigned numChildren = mGridActor.GetChildCount();
560 for( unsigned i = 0; i < numChildren; ++i )
562 ImageView gridImageView = ImageView::DownCast( mGridActor.GetChildAt( i ) );
565 // Cycle the scaling mode options:
566 unsigned int id = gridImageView.GetId();
568 const Vector2 imageSize = mSizes[ id ];
569 Dali::FittingMode::Type newMode = NextMode( mFittingModes[ id ] );
572 map[Visual::Property::TYPE] = Visual::IMAGE;
573 map[ImageVisual::Property::URL] = mResourceUrls[id];
574 map[ImageVisual::Property::DESIRED_WIDTH] = imageSize.width;
575 map[ImageVisual::Property::DESIRED_HEIGHT] = imageSize.height;
576 map[ImageVisual::Property::FITTING_MODE] = newMode;
577 gridImageView.SetProperty( ImageView::Property::IMAGE, map );
581 mFittingModes[ id ] = newMode;
583 SetTitle( std::string( newMode == FittingMode::SHRINK_TO_FIT ? "SHRINK_TO_FIT" : newMode == FittingMode::SCALE_TO_FILL ? "SCALE_TO_FILL" : newMode == FittingMode::FIT_WIDTH ? "FIT_WIDTH" : "FIT_HEIGHT" ) );
590 * Sets/Updates the title of the View
591 * @param[in] title The new title for the view.
593 void SetTitle(const std::string& title)
597 mTitleActor = DemoHelper::CreateToolBarLabel( "" );
598 // Add title to the tool bar.
599 mToolBar.AddControl( mTitleActor, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarTitlePercentage, Alignment::HorizontalCenter );
602 mTitleActor.SetProperty( TextLabel::Property::TEXT, title );
606 * When scroll starts (i.e. user starts to drag scrollview),
607 * note this state (mScrolling = true)
608 * @param[in] position Current Scroll Position
610 void OnScrollStarted( const Vector2& position )
616 * When scroll starts (i.e. user stops dragging scrollview, and scrollview has snapped to destination),
617 * note this state (mScrolling = false).
618 * @param[in] position Current Scroll Position
620 void OnScrollCompleted( const Vector2& position )
626 Application& mApplication;
628 Layer mContentLayer; ///< The content layer (contains non gui chrome actors)
629 Toolkit::Control mView; ///< The View instance.
630 Toolkit::ToolBar mToolBar; ///< The View's Toolbar.
631 TextLabel mTitleActor; ///< The Toolbar's Title.
632 Actor mGridActor; ///< The container for the grid of images
633 Actor mOffStageImageViews;
634 ScrollView mScrollView; ///< ScrollView UI Component
635 ScrollBar mScrollBarVertical;
636 ScrollBar mScrollBarHorizontal;
637 bool mScrolling; ///< ScrollView scrolling state (true = scrolling, false = stationary)
638 std::map<unsigned, Dali::FittingMode::Type> mFittingModes; ///< Stores the current scaling mode of each image, keyed by image actor id.
639 std::map<unsigned, std::string> mResourceUrls; ///< Stores the url of each image, keyed by image actor id.
640 std::map<unsigned, Vector2> mSizes; ///< Stores the current size of each image, keyed by image actor id.
641 unsigned int mImagesLoaded; ///< How many images have been loaded
644 void RunTest( Application& application )
646 ImageScalingIrregularGridController test( application );
648 application.MainLoop();
651 /** Entry point for Linux & Tizen applications */
652 int DALI_EXPORT_API main( int argc, char **argv )
654 Application application = Application::New( &argc, &argv, DEMO_THEME_PATH );
656 RunTest( application );