ScrollingView
interface ScrollingView
| androidx.core.view.ScrollingView |
An interface that can be implemented by Views to provide scroll related APIs.
Summary
| Public methods | |
|---|---|
| abstract Int |
Compute the horizontal extent of the horizontal scrollbar's thumb within the horizontal range. |
| abstract Int |
Compute the horizontal offset of the horizontal scrollbar's thumb within the horizontal range. |
| abstract Int |
Compute the horizontal range that the horizontal scrollbar represents. |
| abstract Int |
Compute the vertical extent of the vertical scrollbar's thumb within the vertical range. |
| abstract Int |
Compute the vertical offset of the vertical scrollbar's thumb within the horizontal range. |
| abstract Int |
Compute the vertical range that the vertical scrollbar represents. |
Public methods
computeHorizontalScrollExtent
abstract fun computeHorizontalScrollExtent(): Int
Compute the horizontal extent of the horizontal scrollbar's thumb within the horizontal range. This value is used to compute the length of the thumb within the scrollbar's track.
The range is expressed in arbitrary units that must be the same as the units used by computeHorizontalScrollRange() and computeHorizontalScrollOffset().
The default extent is the drawing width of this view.
| Return | |
|---|---|
Int |
the horizontal extent of the scrollbar's thumb |
computeHorizontalScrollOffset
abstract fun computeHorizontalScrollOffset(): Int
Compute the horizontal offset of the horizontal scrollbar's thumb within the horizontal range. This value is used to compute the position of the thumb within the scrollbar's track.
The range is expressed in arbitrary units that must be the same as the units used by computeHorizontalScrollRange() and computeHorizontalScrollExtent().
The default offset is the scroll offset of this view.
| Return | |
|---|---|
Int |
the horizontal offset of the scrollbar's thumb |
computeHorizontalScrollRange
abstract fun computeHorizontalScrollRange(): Int
Compute the horizontal range that the horizontal scrollbar represents.
The range is expressed in arbitrary units that must be the same as the units used by computeHorizontalScrollExtent() and computeHorizontalScrollOffset().
The default range is the drawing width of this view.
| Return | |
|---|---|
Int |
the total horizontal range represented by the horizontal scrollbar |
computeVerticalScrollExtent
abstract fun computeVerticalScrollExtent(): Int
Compute the vertical extent of the vertical scrollbar's thumb within the vertical range. This value is used to compute the length of the thumb within the scrollbar's track.
The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollRange() and computeVerticalScrollOffset().
The default extent is the drawing height of this view.
| Return | |
|---|---|
Int |
the vertical extent of the scrollbar's thumb |
computeVerticalScrollOffset
abstract fun computeVerticalScrollOffset(): Int
Compute the vertical offset of the vertical scrollbar's thumb within the horizontal range. This value is used to compute the position of the thumb within the scrollbar's track.
The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollRange() and computeVerticalScrollExtent().
The default offset is the scroll offset of this view.
| Return | |
|---|---|
Int |
the vertical offset of the scrollbar's thumb |
computeVerticalScrollRange
abstract fun computeVerticalScrollRange(): Int
Compute the vertical range that the vertical scrollbar represents.
The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollExtent() and computeVerticalScrollOffset().
| Return | |
|---|---|
Int |
the total vertical range represented by the vertical scrollbar
The default range is the drawing height of this view. |