color-visual-example.cpp
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/*
* Copyright (c) 2020 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/control-devel.h>
#include <dali-toolkit/devel-api/visuals/visual-properties-devel.h>
#include <dali-toolkit/devel-api/visuals/color-visual-properties-devel.h>
#include <dali-toolkit/devel-api/visual-factory/transition-data.h>
using namespace Dali;
using namespace Dali::Toolkit;
namespace
{
const char* IMAGE_FILE( DEMO_IMAGE_DIR "gallery-medium-1.jpg" );
const float BLUR_RADIUS_VALUE( 10.0f );
const float NO_BLUR_VALUE( 0.0f );
const float ANIMATION_DURATION( 2.0f );
const Property::Value SHADOW
{
{ Visual::Property::TYPE, Visual::COLOR },
{ Visual::Property::MIX_COLOR, Vector4( 0.0f, 0.0f, 0.0f, 0.5f ) },
{ Visual::Property::TRANSFORM, Property::Map{ { Visual::Transform::Property::OFFSET, Vector2( 0.05f, 0.05f ) },
{ Visual::Transform::Property::SIZE, Vector2( 1.05f, 1.05f ) },
{ Visual::Transform::Property::ORIGIN, Align::CENTER },
{ Visual::Transform::Property::ANCHOR_POINT, Align::CENTER } } },
{ DevelColorVisual::Property::BLUR_RADIUS, BLUR_RADIUS_VALUE }
};
} // namespace
// This example shows the blur radius property of the color visual and animates it.
//
class ColorVisualExample : public ConnectionTracker
{
public:
ColorVisualExample( Application& application )
: mApplication( application ),
mShadowVisible( true )
{
// Connect to the Application's Init signal
mApplication.InitSignal().Connect( this, &ColorVisualExample::Create );
}
~ColorVisualExample()
{
// 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 );
mImageView = ImageView::New( IMAGE_FILE );
mImageView.SetParentOrigin( ParentOrigin::CENTER );
mImageView.SetSize( 200.0f, 200.0f );
mImageView.SetProperty( DevelControl::Property::SHADOW, SHADOW );
stage.Add( mImageView );
// Respond to a click anywhere on the stage
stage.GetRootLayer().TouchSignal().Connect( this, &ColorVisualExample::OnTouch );
// Respond to key events
stage.KeyEventSignal().Connect( this, &ColorVisualExample::OnKeyEvent );
}
bool OnTouch( Actor actor, const TouchData& touch )
{
if( touch.GetState( 0 ) == PointState::UP )
{
float initialValue, targetValue;
if( !mShadowVisible )
{
initialValue = NO_BLUR_VALUE;
targetValue = BLUR_RADIUS_VALUE;
}
else
{
initialValue = BLUR_RADIUS_VALUE;
targetValue = NO_BLUR_VALUE;
}
mShadowVisible = !mShadowVisible;
TransitionData transitionData = TransitionData::New( Property::Map().Add( "target", "shadow" )
.Add( "property", "blurRadius" )
.Add( "initialValue", initialValue )
.Add( "targetValue", targetValue )
.Add( "animator", Property::Map().Add( "duration", ANIMATION_DURATION ) ) );
Animation animation = DevelControl::CreateTransition( Toolkit::Internal::GetImplementation( mImageView ), transitionData );
animation.Play();
}
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;
ImageView mImageView;
bool mShadowVisible;
};
int DALI_EXPORT_API main( int argc, char **argv )
{
Application application = Application::New( &argc, &argv );
ColorVisualExample test( application );
application.MainLoop();
return 0;
}