image-view-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 <string>
#include "shared/view.h"
#include <dali/dali.h>
#include <dali-toolkit/dali-toolkit.h>
#include <dali-toolkit/devel-api/visuals/image-visual-properties-devel.h>
#include <dali-toolkit/devel-api/visual-factory/visual-factory.h>
using namespace Dali;
namespace
{
const char* BACKGROUND_IMAGE( DEMO_IMAGE_DIR "background-gradient.jpg" );
const char* TOOLBAR_IMAGE( DEMO_IMAGE_DIR "top-bar.png" );
const char* APPLICATION_TITLE( "Image view" );
const char* IMAGE_PATH[] = {
DEMO_IMAGE_DIR "gallery-small-23.jpg",
DEMO_IMAGE_DIR "woodEffect.jpg",
DEMO_IMAGE_DIR "heartsframe.9.png",
DEMO_IMAGE_DIR "World.svg"
};
const unsigned int NUMBER_OF_IMAGES = 3;
enum CellPlacement
{
TOP_BUTTON,
LOWER_BUTTON,
IMAGE,
NUMBER_OF_ROWS
};
unsigned int GetButtonIndex( Toolkit::Button button )
{
std::string buttonName = button.GetName();
unsigned int index = 0;
if ( buttonName != "")
{
index = std::stoul( buttonName );
}
return index;
}
const unsigned int NUMBER_OF_RESOURCES = sizeof(IMAGE_PATH) / sizeof(char*);
std::string EXAMPLE_INSTRUCTIONS = "Instructions: Change button cycles through different image visuals, "
"on/off takes the ImageView and it's current visual on or off stage.";
} // namespace
class ImageViewController: public ConnectionTracker
{
public:
ImageViewController( Application& application )
: mApplication( application ),
mCurrentPositionToggle( 0, 0 ),
mCurrentPositionImage( 0, 0 )
{
// Connect to the Application's Init signal
mApplication.InitSignal().Connect( this, &ImageViewController::Create );
}
~ImageViewController()
{
// Nothing to do here
}
void Create( Application& application )
{
// The Init signal is received once (only) during the Application lifetime
// Creates a default view with a default tool bar.
// The view is added to the stage.
mContentLayer = DemoHelper::CreateView( application,
mView,
mToolBar,
BACKGROUND_IMAGE,
TOOLBAR_IMAGE,
APPLICATION_TITLE );
// Create a table view to show a pair of buttons above each image.
mTable = Toolkit::TableView::New( CellPlacement::NUMBER_OF_ROWS, NUMBER_OF_IMAGES );
mTable.SetAnchorPoint( AnchorPoint::CENTER );
mTable.SetParentOrigin( ParentOrigin::CENTER );
mTable.SetResizePolicy( ResizePolicy::SIZE_RELATIVE_TO_PARENT, Dimension::ALL_DIMENSIONS );
Vector3 offset( 0.9f, 0.70f, 0.0f );
mTable.SetSizeModeFactor( offset );
mTable.SetFitHeight(CellPlacement::TOP_BUTTON);
mTable.SetFitHeight(CellPlacement::LOWER_BUTTON);
mContentLayer.Add( mTable );
Toolkit::TextLabel instructions = Toolkit::TextLabel::New( EXAMPLE_INSTRUCTIONS );
instructions.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
instructions.SetParentOrigin(ParentOrigin::BOTTOM_CENTER);
instructions.SetY(-50.0f);
instructions.SetProperty( Toolkit::TextLabel::Property::ENABLE_AUTO_SCROLL, true );
instructions.SetProperty( Toolkit::TextLabel::Property::AUTO_SCROLL_LOOP_COUNT, 10 );
mContentLayer.Add(instructions);
for( unsigned int x = 0; x < NUMBER_OF_IMAGES; x++ )
{
Toolkit::PushButton button = Toolkit::PushButton::New();
button.SetProperty( Toolkit::Button::Property::LABEL, "on/off" );
button.SetParentOrigin( ParentOrigin::TOP_CENTER );
button.SetAnchorPoint( AnchorPoint::TOP_CENTER );
button.ClickedSignal().Connect( this, &ImageViewController::ToggleImageOnStage );
button.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
button.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
std::string s = std::to_string(x);
button.SetName( s );
mTable.AddChild( button, Toolkit::TableView::CellPosition( CellPlacement::TOP_BUTTON, x ) );
Toolkit::PushButton button2 = Toolkit::PushButton::New();
button2.SetProperty( Toolkit::Button::Property::LABEL, "Change" );
button2.SetParentOrigin( ParentOrigin::BOTTOM_CENTER );
button2.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER );
button2.ClickedSignal().Connect( this, &ImageViewController::ChangeImageClicked );
button2.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
button2.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
button2.SetName( s );
mTable.AddChild( button2, Toolkit::TableView::CellPosition( CellPlacement::LOWER_BUTTON, x ) );
mImageViews[x] = Toolkit::ImageView::New( );
Property::Map imagePropertyMap;
imagePropertyMap.Insert( Toolkit::Visual::Property::TYPE, Toolkit::Visual::IMAGE );
imagePropertyMap.Insert( Toolkit::ImageVisual::Property::URL, IMAGE_PATH[ 0 ] );
mImageViews[x].SetProperty(Toolkit::ImageView::Property::IMAGE , imagePropertyMap );
mImageViews[x].SetParentOrigin( ParentOrigin::CENTER );
mImageViews[x].SetAnchorPoint( AnchorPoint::CENTER );
mImageViews[x].SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
mTable.AddChild( mImageViews[x], Toolkit::TableView::CellPosition( CellPlacement::IMAGE, x ) );
// Set changeable counter and toggle for each ImageView
mImageViewImageIndexStatus[x] = true;
mImageViewToggleStatus[x] = true;
}
Stage::GetCurrent().KeyEventSignal().Connect(this, &ImageViewController::OnKeyEvent);
}
private:
void ImmediateLoadImage( const char* urlToLoad )
{
Property::Map imagePropertyMap;
imagePropertyMap.Insert( Toolkit::Visual::Property::TYPE, Toolkit::Visual::IMAGE );
imagePropertyMap.Insert( Toolkit::ImageVisual::Property::URL, urlToLoad );
Toolkit::Visual::Base visual = Toolkit::VisualFactory::Get().CreateVisual( imagePropertyMap );
visual.Reset();
}
bool ToggleImageOnStage( Toolkit::Button button )
{
unsigned int buttonIndex = GetButtonIndex( button );
Toolkit::ImageView imageView = mImageViews[ buttonIndex ];
if( mImageViewToggleStatus[ buttonIndex ] )
{
imageView.Unparent();
}
else
{
mTable.AddChild( imageView, Toolkit::TableView::CellPosition( 2, GetButtonIndex( button ) ) );
}
mImageViewToggleStatus[ buttonIndex ] = !mImageViewToggleStatus[ buttonIndex ];
return true;
}
bool ChangeImageClicked( Toolkit::Button button )
{
unsigned int buttonIndex = GetButtonIndex( button );
if ( mImageViews[buttonIndex].OnStage() )
{
Property::Map imagePropertyMap;
imagePropertyMap.Insert( Toolkit::Visual::Property::TYPE, Toolkit::Visual::IMAGE );
imagePropertyMap.Insert( Toolkit::ImageVisual::Property::URL, IMAGE_PATH[ mImageViewImageIndexStatus[buttonIndex] ] );
mImageViews[buttonIndex].SetProperty(Toolkit::ImageView::Property::IMAGE , imagePropertyMap );
++mImageViewImageIndexStatus[buttonIndex];
if( mImageViewImageIndexStatus[buttonIndex] == NUMBER_OF_RESOURCES )
{
mImageViewImageIndexStatus[buttonIndex] = 0;
}
}
return true;
}
/**
* Main key event handler
*/
void OnKeyEvent(const KeyEvent& event)
{
if(event.state == KeyEvent::Down)
{
if( IsKey( event, DALI_KEY_ESCAPE) || IsKey( event, DALI_KEY_BACK ) )
{
mApplication.Quit();
}
}
}
private:
Application& mApplication;
Toolkit::Control mView; ///< The View instance.
Toolkit::ToolBar mToolBar; ///< The View's Toolbar.
Layer mContentLayer; ///< Content layer
Toolkit::TableView mTable;
Toolkit::ImageView mImageViews[ NUMBER_OF_IMAGES ];
bool mImageViewToggleStatus[ NUMBER_OF_IMAGES ];
unsigned int mImageViewImageIndexStatus[ NUMBER_OF_IMAGES ];
Toolkit::TableView::CellPosition mCurrentPositionToggle;
Toolkit::TableView::CellPosition mCurrentPositionImage;
};
int DALI_EXPORT_API main( int argc, char **argv )
{
Application application = Application::New( &argc, &argv, DEMO_THEME_PATH );
ImageViewController test( application );
application.MainLoop();
return 0;
}