package cc.shinichi.library.view.listener
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/**
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* @author 工藤
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* @email qinglingou@gmail.com
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* cc.shinichi.library.view.listener
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* create at 2019/1/7 11:45
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* description:
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*/
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interface OnBigImagePageChangeListener {
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/**
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* This method will be invoked when the current page is scrolled, either as part
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* of a programmatically initiated smooth scroll or a user initiated touch scroll.
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*
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* @param position Position index of the first page currently being displayed.
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* Page position+1 will be visible if positionOffset is nonzero.
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* @param positionOffset Value from [0, 1) indicating the offset from the page at position.
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* @param positionOffsetPixels Value in pixels indicating the offset from position.
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*/
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fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int)
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/**
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* This method will be invoked when a new page becomes selected. Animation is not
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* necessarily complete.
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*
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* @param position Position index of the new selected page.
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*/
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fun onPageSelected(position: Int)
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/**
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* Called when the scroll state changes. Useful for discovering when the user
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* begins dragging, when the pager is automatically settling to the current page,
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* or when it is fully stopped/idle.
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*
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* @param state The new scroll state.
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* @see ViewPager.SCROLL_STATE_IDLE
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*
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* @see ViewPager.SCROLL_STATE_DRAGGING
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*
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* @see ViewPager.SCROLL_STATE_SETTLING
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*/
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fun onPageScrollStateChanged(state: Int)
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}
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