animatedgridspacer.c

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// Different easing functions
enum AnimatedGridSpacerEasingType
{
    EASE_LINEAR,
    EASE_IN_OUT_CUBIC,
    EASE_IN_OUT_QUART,
    EASE_OUT_BOUNCE,
    EASE_OUT_BACK
}
    
class AnimatedGridSpacer
{
    Widget m_GridSpacer;
    float m_ColumWidth = 0;
    
    float m_AnimationDuration = 0.25;
    float m_AnimationTime = 0;
    
    float m_CurrentPosX, m_CurrentPosY;
    float m_BasePosX, m_BasePosY;
    float m_StartPosX, m_TargetPosX;
    
    bool m_IsAnimating = false;
    int m_CurrentColum = 0;
    int m_MaxColums = 3;
        
    AnimatedGridSpacerEasingType m_EasingType = AnimatedGridSpacerEasingType.EASE_IN_OUT_CUBIC;
    
    ref ScriptInvoker m_OnAnimationComplete;
    
    void AnimatedGridSpacer(Widget gridSpacer, int maxColums, float animDuration = 0.25, AnimatedGridSpacerEasingType easing = AnimatedGridSpacerEasingType.EASE_IN_OUT_CUBIC)
    {
        m_GridSpacer = gridSpacer;
        m_MaxColums = maxColums;
        m_AnimationDuration = animDuration;
        m_EasingType = easing;
        
        if (m_GridSpacer)
        {
            SetColumWidth();
            
            m_GridSpacer.GetScreenPos(m_CurrentPosX, m_CurrentPosY);
            m_GridSpacer.GetScreenPos(m_BasePosX, m_BasePosY);
            m_CurrentPosX = m_BasePosX;
            m_CurrentPosY = m_BasePosY;
        }
        
        m_OnAnimationComplete = new ScriptInvoker();
    }
    
    void SetColumWidth()
    {
        if (!m_GridSpacer)
            return;
        
        Widget panel = m_GridSpacer.GetChildren();
        if (panel)
        {
            float w, h;
            panel.GetSize(w, h);
            m_ColumWidth = w;
        }
    }
    
    float ApplyEasing(float t)
    {
        switch(m_EasingType)
        {
            case AnimatedGridSpacerEasingType.EASE_LINEAR:
            {
                return t;
            }
            case AnimatedGridSpacerEasingType.EASE_IN_OUT_CUBIC:
            {
                return Easing.EaseInOutCubic(t);
            }
            case AnimatedGridSpacerEasingType.EASE_IN_OUT_QUART:
            {
                return Easing.EaseInOutQuad(t);
            }
            case AnimatedGridSpacerEasingType.EASE_OUT_BOUNCE:
            {
                return Easing.EaseOutBounce(t);
            }
            case AnimatedGridSpacerEasingType.EASE_OUT_BACK:
            {
                return Easing.EaseOutBack(t);
            }
        }
        return t;
    }
    
    void AnimateToColum(int targetColumn)
    {
        if (m_IsAnimating || targetColumn == m_CurrentColum)
            return;
        
        if (m_IsAnimating || targetColumn == m_CurrentColum) 
            return;
                
        m_StartPosX = m_CurrentPosX;
        m_TargetPosX = m_BasePosX - (targetColumn * m_ColumWidth);
        m_CurrentColum = targetColumn;
        m_AnimationTime = 0;
        m_IsAnimating = true;
    }
    
    void MoveRight()
    {
        if (!m_IsAnimating)
        {
            int nextColum = m_CurrentColum + 1;
            if (nextColum <= m_MaxColums)
            {
                AnimateToColum(nextColum);
            }
        }
    }
    
    void MoveLeft()
    {
        if (!m_IsAnimating)
        {
            int prevColum = m_CurrentColum - 1;
            if (prevColum >= 0)
            {
                AnimateToColum(prevColum);
            }
        }
    }
    
    void Update(float timeslice)
    {       
        if (!m_IsAnimating || !m_GridSpacer) 
            return;
        
        m_AnimationTime += timeslice;       
        if (m_AnimationTime >= m_AnimationDuration)
        {
            m_CurrentPosX = m_TargetPosX;
            m_GridSpacer.SetScreenPos(m_CurrentPosX, m_CurrentPosY);
            m_AnimationTime = 0;
            m_IsAnimating = false;
            
            m_GridSpacer.GetScreenPos(m_CurrentPosX, m_CurrentPosY);
        }
        else
        {
            float progress = m_AnimationTime / m_AnimationDuration;
            float easedProgress = ApplyEasing(progress);
            
            m_CurrentPosX = m_StartPosX + (m_TargetPosX - m_StartPosX) * easedProgress;
            m_GridSpacer.SetScreenPos(m_CurrentPosX, m_CurrentPosY);
            
            m_OnAnimationComplete.Invoke();
        }
    }
        
    void SetAnimationDuration(float duration)
    {
        m_AnimationDuration = duration;
    }
    
    void SetEasingType(AnimatedGridSpacerEasingType easing)
    {
        m_EasingType = easing;
    }
    
    bool IsAnimating()
    {
        return m_IsAnimating;
    }
    
    int GetCurrentRow()
    {
        return m_CurrentColum;
    }
}