This class manages the pane expansion state for pane scaffolds. By providing and modifying an instance of this class, you can specify the expanded panes' expansion width or proportion when pane scaffold is displaying a dual-pane layout.

This class also serves as the DraggableState of pane expansion handle. When a handle implementation is provided to the associated pane scaffold, the scaffold will use PaneExpansionState to store and manage dragging and anchoring of the handle, and thus the pane expansion state.

Summary

Constants
const Int

The constant value used to denote the pane expansion is not specified.
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Public functions
Unit

Clears any previously set firstPaneWidth or firstPaneProportion, as well as the user dragging result.
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Boolean

Returns true if none of firstPaneWidth or firstPaneProportion has been set.
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Unit
setFirstPaneProportion(
    firstPaneProportion: @FloatRange(from = 0.0, to = 1.0) Float
)

Set the proportion of the first expanded pane in the layout.
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Unit
setFirstPaneWidth(firstPaneWidth: Int)

Set the width of the first expanded pane in the layout.
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Constants

Unspecified

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const val Unspecified: Int

The constant value used to denote the pane expansion is not specified.

Public functions

clear

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Added in 1.1.0-alpha08
fun clear(): Unit

Clears any previously set firstPaneWidth or firstPaneProportion, as well as the user dragging result.

isUnspecified

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Added in 1.1.0-alpha08
fun isUnspecified(): Boolean

Returns true if none of firstPaneWidth or firstPaneProportion has been set.

setFirstPaneProportion

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Added in 1.1.0-alpha08
fun setFirstPaneProportion(
    firstPaneProportion: @FloatRange(from = 0.0, to = 1.0) Float
): Unit

Set the proportion of the first expanded pane in the layout. The set value needs to be within the range of [0f, 1f], otherwise the setter throws.

Note that setting this value will reset the first pane width previously set via setFirstPaneWidth or the current dragging result if there's any. Also if user drags the pane after setting the first pane proportion, the user dragging result will take the priority over this set value when rendering panes, but the set value will be saved.

setFirstPaneWidth

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Added in 1.1.0-alpha08
fun setFirstPaneWidth(firstPaneWidth: Int): Unit

Set the width of the first expanded pane in the layout. When the set value gets applied, it will be coerced within the range of [0, the full displayable width of the layout].

Note that setting this value will reset the first pane proportion previously set via setFirstPaneProportion or the current dragging result if there's any. Also if user drags the pane after setting the first pane width, the user dragging result will take the priority over this set value when rendering panes, but the set value will be saved.