frame-callback.cpp
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/*
* Copyright (c) 2018 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.
*
*/
// CLASS HEADER
#include "frame-callback.h"
#include <iostream>
using namespace Dali;
FrameCallback::FrameCallback()
: mActorIdContainer(),
stageHalfWidth( 0.0f )
{
}
void FrameCallback::SetStageWidth( float stageWidth )
{
stageHalfWidth = stageWidth * 0.5f;
}
void FrameCallback::AddId( unsigned int id )
{
mActorIdContainer.PushBack( id );
}
void FrameCallback::Update( Dali::UpdateProxy& updateProxy, float /* elapsedSeconds */ )
{
// Go through Actor ID container and check if we've hit the sides.
for( auto&& i : mActorIdContainer )
{
Vector3 position;
Vector3 size;
updateProxy.GetPositionAndSize( i, position, size ); // Retrieve the position and size using the Actor ID.
float halfWidthPoint = stageHalfWidth - size.width * 0.5f;
float xTranslation = std::abs( position.x );
if( xTranslation > halfWidthPoint )
{
// Actor has hit the edge, adjust the size accordingly.
float adjustment = xTranslation - halfWidthPoint;
size.width += adjustment * SIZE_MULTIPLIER;
size.height += adjustment * SIZE_MULTIPLIER;
updateProxy.SetSize( i, size ); // Set the size using the UpdateProxy.
}
// Retrieve the actor's position and set make it more transparent the closer it is to the middle.
Vector4 color = updateProxy.GetWorldColor( i );
color.a = xTranslation / halfWidthPoint;
updateProxy.SetWorldColor( i, color );
}
}