frame-callback.h
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#ifndef DEMO_FRAME_CALLBACK_H
#define DEMO_FRAME_CALLBACK_H
/*
* Copyright (c) 2023 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.
*
*/
// EXTERNAL INCLUDES
#include <dali/devel-api/update/frame-callback-interface.h>
#include <dali/devel-api/update/update-proxy.h>
#include <dali/public-api/common/dali-vector.h>
/**
* @brief Implementation of the FrameCallbackInterface.
*
* When this is used, it will expand the size of the actors the closer they get to the horizontal edge
* and make the actor transparent the closer it gets to the middle.
*/
class FrameCallback : public Dali::FrameCallbackInterface
{
public:
/**
* @brief Constructor.
*/
FrameCallback();
/**
* @brief Sets the window width.
* @param[in] windowWidth The window width.
*/
void SetWindowWidth(float windowWidth);
/**
* @brief The actor with the specified ID will be changed when Update() is called.
* @param[in] id Actor ID of actor which should be changed by the FrameCallback.
*/
void AddId(uint32_t id);
private:
/**
* @brief Called when every frame is updated.
* @param[in] updateProxy Used to set the world-matrix and sizes.
* @param[in] elapsedSeconds Time elapsed time since the last frame (in seconds)
* @return Whether we should keep rendering.
*/
virtual bool Update(Dali::UpdateProxy& updateProxy, float elapsedSeconds);
private:
Dali::Vector<uint32_t> mActorIdContainer; ///< Container of Actor IDs.
float windowHalfWidth; ///< Half the width of the window. Center is 0,0 in the world matrix.
constexpr static float SIZE_MULTIPLIER = 2.0f; ///< Multiplier for the size to set as the actors hit the edge.
};
#endif // DEMO_FRAME_CALLBACK_H