animated-images-example.cpp
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/*
* Copyright (c) 2017 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <dali-toolkit/dali-toolkit.h>
#include <dali-toolkit/devel-api/controls/buttons/button-devel.h>
#include "shared/utility.h"
using namespace Dali;
using namespace Dali::Toolkit;
namespace
{
const char * const PLAY_ICON( DEMO_IMAGE_DIR "icon-play.png" );
const char * const PLAY_ICON_SELECTED( DEMO_IMAGE_DIR "icon-play-selected.png" );
const char* const STATIC_GIF_DOG( DEMO_IMAGE_DIR "dog-static.gif" );
const char* const ANIMATE_GIF_DOG( DEMO_IMAGE_DIR "dog-anim.gif" );
const char* const STATIC_GIF_LOGO( DEMO_IMAGE_DIR "dali-logo-static.gif" );
const char* const ANIMATE_GIF_LOGO( DEMO_IMAGE_DIR "dali-logo-anim.gif" );
const Vector4 DIM_COLOR( 0.85f, 0.85f, 0.85f, 0.85f );
}
/* This example shows how to display a GIF image.
* First a static GIF image is loaded and then when the user presses on the "Play" icon,
* the static image is replaced by an animated one
*/
class AnimatedImageController : public ConnectionTracker
{
public:
AnimatedImageController( Application& application )
: mApplication( application )
{
// Connect to the Application's Init signal
mApplication.InitSignal().Connect( this, &AnimatedImageController::Create );
}
~AnimatedImageController()
{
// Nothing to do here;
}
// The Init signal is received once (only) during the Application lifetime
void Create( Application& application )
{
// Get a handle to the stage
Stage stage = Stage::GetCurrent();
stage.SetBackgroundColor( Color::WHITE );
// Tie-in input event handlers:
stage.KeyEventSignal().Connect( this, &AnimatedImageController::OnKeyEvent );
mActorDog = CreateGifViewWithOverlayButton( STATIC_GIF_DOG );
mActorDog.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER );
mActorDog.SetY( -100.f );
stage.Add( mActorDog );
mActorLogo = CreateGifViewWithOverlayButton( STATIC_GIF_LOGO );
mActorLogo.SetAnchorPoint( AnchorPoint::TOP_CENTER );
mActorLogo.SetY( 100.f );
stage.Add( mActorLogo );
}
/**
* Create the gif image view with an overlay play button.
*/
Toolkit::ImageView CreateGifViewWithOverlayButton( const std::string& gifUrl )
{
Toolkit::ImageView imageView = Toolkit::ImageView::New( gifUrl );
imageView.SetParentOrigin( ParentOrigin::CENTER );
// Create a push button, and add it as child of the image view
Toolkit::PushButton animateButton = Toolkit::PushButton::New();
animateButton.SetProperty( Toolkit::DevelButton::Property::UNSELECTED_BACKGROUND_VISUAL, PLAY_ICON );
animateButton.SetProperty( Toolkit::DevelButton::Property::SELECTED_BACKGROUND_VISUAL, PLAY_ICON_SELECTED );
animateButton.SetParentOrigin( ParentOrigin::CENTER );
animateButton.SetAnchorPoint( AnchorPoint::CENTER );
animateButton.ClickedSignal().Connect( this, &AnimatedImageController::OnPlayButtonClicked );
imageView.Add( animateButton );
// Apply dim color on the gif view and the play button
imageView.SetColor( DIM_COLOR );
return imageView;
}
bool OnPlayButtonClicked( Toolkit::Button button )
{
Stage stage = Stage::GetCurrent();
// With play button clicked, the static gif is replaced with animated gif.
if( button.GetParent() == mActorDog )
{
// remove the static gif view, the play button is also removed as its child.
stage.Remove( mActorDog );
mActorDog = Toolkit::ImageView::New( ANIMATE_GIF_DOG );
mActorDog.SetParentOrigin( ParentOrigin::CENTER );
mActorDog.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER );
mActorDog.SetY( -100.f );
stage.Add( mActorDog );
}
else // button.GetParent() == mActorLogo
{
// remove the static gif view, the play button is also removed as its child.
stage.Remove( mActorLogo );
mActorLogo = Toolkit::ImageView::New( ANIMATE_GIF_LOGO );
mActorLogo.SetParentOrigin( ParentOrigin::CENTER );
mActorLogo.SetAnchorPoint( AnchorPoint::TOP_CENTER );
mActorLogo.SetY( 100.f );
stage.Add( mActorLogo );
}
return true;
}
void OnKeyEvent(const KeyEvent& event)
{
if(event.state == KeyEvent::Down)
{
if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
{
mApplication.Quit();
}
}
}
private:
Application& mApplication;
Toolkit::ImageView mActorDog;
Toolkit::ImageView mActorLogo;
};
// Entry point for Linux & Tizen applications
//
int DALI_EXPORT_API main( int argc, char **argv )
{
Application application = Application::New( &argc, &argv );
AnimatedImageController test( application );
application.MainLoop();
return 0;
}