Animation.hpp

 
//
// TGUI - Texus' Graphical User Interface
// Copyright (C) 2012-2020 Bruno Van de Velde (vdv_b@tgui.eu)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
 
 
#ifndef TGUI_ANIMATION_HPP
#define TGUI_ANIMATION_HPP
 
#include <TGUI/Vector2f.hpp>
#include <SFML/System/Time.hpp>
#include <functional>
#include <memory>
 
 
namespace tgui
{
 class Widget;
 
 enum class ShowAnimationType
 {
 Fade, 
 Scale, 
 SlideToRight, 
 SlideToLeft, 
 SlideToBottom, 
 SlideToTop, 
 
 SlideFromLeft = SlideToRight, 
 SlideFromRight = SlideToLeft, 
 SlideFromTop = SlideToBottom, 
 SlideFromBottom = SlideToTop 
 };
 
 namespace priv
 {
 
 class TGUI_API Animation
 {
 public:
 enum class Type
 {
 None = 0,
 Move = 1,
 Resize = 2,
 Fade = 4
 };
 
 // Move constructor has to be explicitly declared since this class has a destructor
 Animation() = default;
 Animation(const Animation&) = default;
 Animation(Animation&&) = default;
 Animation& operator=(const Animation&) = default;
 Animation& operator=(Animation&&) = default;
 virtual ~Animation() = default;
 
 Type getType() const;
 
 virtual bool update(sf::Time elapsedTime) = 0;
 virtual void finish();
 
 protected:
 Animation(Type type, std::shared_ptr<Widget> widget, sf::Time duration, std::function<void()> finishedCallback);
 
 protected:
 Type m_type = Type::None;
 std::shared_ptr<Widget> m_widget;
 
 sf::Time m_totalDuration;
 sf::Time m_elapsedTime;
 
 std::function<void()> m_finishedCallback;
 };
 
 
 class TGUI_API MoveAnimation : public Animation
 {
 public:
 MoveAnimation(std::shared_ptr<Widget> widget, Vector2f start, Vector2f end, sf::Time duration, std::function<void()> finishedCallback = nullptr);
 
 bool update(sf::Time elapsedTime) override;
 
 void finish() override;
 
 private:
 Vector2f m_startPos;
 Vector2f m_endPos;
 };
 
 
 class TGUI_API ResizeAnimation : public Animation
 {
 public:
 ResizeAnimation(std::shared_ptr<Widget> widget, Vector2f start, Vector2f end, sf::Time duration, std::function<void()> finishedCallback = nullptr);
 
 bool update(sf::Time elapsedTime) override;
 
 void finish() override;
 
 private:
 Vector2f m_startSize;
 Vector2f m_endSize;
 };
 
 
 class TGUI_API FadeAnimation : public Animation
 {
 public:
 FadeAnimation(std::shared_ptr<Widget> widget, float start, float end, sf::Time duration, std::function<void()> finishedCallback = nullptr);
 
 bool update(sf::Time elapsedTime) override;
 
 void finish() override;
 
 private:
 float m_startOpacity;
 float m_endOpacity;
 };
 
 
 } // namespace priv
} // namespace tgui
 
 
#endif // TGUI_ANIMATION_HPP