java.lang.Object
javax.swing.plaf.ComponentUI
javax.swing.plaf.ListUI
- Direct Known Subclasses:
BasicListUI
,MultiListUI
The
JList
pluggable look and feel delegate.-
Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionabstract Rectangle
getCellBounds
(JList<?> list, int index1, int index2) Returns the bounding rectangle, in the given list's coordinate system, for the range of cells specified by the two indices.abstract Point
indexToLocation
(JList<?> list, int index) Returns the origin in the givenJList
, of the specified item, in the list's coordinate system.abstract int
locationToIndex
(JList<?> list, Point location) Returns the cell index in the specifiedJList
closest to the given location in the list's coordinate system.Methods declared in class javax.swing.plaf.ComponentUI
contains, createUI, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior, getMaximumSize, getMinimumSize, getPreferredSize, installUI, paint, uninstallUI, update
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Constructor Details
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ListUI
protected ListUI()Constructor for subclasses to call.
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Method Details
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locationToIndex
Returns the cell index in the specifiedJList
closest to the given location in the list's coordinate system. To determine if the cell actually contains the specified location, compare the point against the cell's bounds, as provided bygetCellBounds
. This method returns-1
if the list's model is empty.- Parameters:
list
- the listlocation
- the coordinates of the point- Returns:
- the cell index closest to the given location, or
-1
- Throws:
NullPointerException
- iflocation
is null
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indexToLocation
Returns the origin in the givenJList
, of the specified item, in the list's coordinate system. Returnsnull
if the index isn't valid.- Parameters:
list
- the listindex
- the cell index- Returns:
- the origin of the cell, or
null
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getCellBounds
Returns the bounding rectangle, in the given list's coordinate system, for the range of cells specified by the two indices. The indices can be supplied in any order.If the smaller index is outside the list's range of cells, this method returns
null
. If the smaller index is valid, but the larger index is outside the list's range, the bounds of just the first index is returned. Otherwise, the bounds of the valid range is returned.- Parameters:
list
- the listindex1
- the first index in the rangeindex2
- the second index in the range- Returns:
- the bounding rectangle for the range of cells, or
null
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