javax.swing.plaf
Class ListUI
- java.lang.Object
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- javax.swing.plaf.ComponentUI
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- javax.swing.plaf.ListUI
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- Direct Known Subclasses:
- BasicListUI, MultiListUI
public abstract class ListUI extends ComponentUI
TheJListpluggable look and feel delegate.
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Constructor Summary
Constructors Constructor and Description ListUI()
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method and Description abstract RectanglegetCellBounds(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 PointindexToLocation(JList list, int index)Returns the origin in the givenJList, of the specified item, in the list's coordinate system.abstract intlocationToIndex(JList list, Point location)Returns the cell index in the specifiedJListclosest to the given location in the list's coordinate system.-
Methods inherited from class javax.swing.plaf.ComponentUI
contains, createUI, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior, getMaximumSize, getMinimumSize, getPreferredSize, installUI, paint, uninstallUI, update
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Method Detail
locationToIndex
public abstract int locationToIndex(JList list, Point location)
Returns the cell index in the specifiedJListclosest 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-1if the list's model is empty.- Parameters:
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list- the list -
location- the coordinates of the point - Returns:
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the cell index closest to the given location, or
-1 - Throws:
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NullPointerException- iflocationis null
indexToLocation
public abstract Point indexToLocation(JList list, int index)
Returns the origin in the givenJList, of the specified item, in the list's coordinate system. Returnsnullif the index isn't valid.- Parameters:
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list- the list -
index- the cell index - Returns:
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the origin of the cell, or
null
getCellBounds
public abstract 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. 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:
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list- the list -
index1- the first index in the range -
index2- the second index in the range - Returns:
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the bounding rectangle for the range of cells, or
null
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