IT. Expert System.

Java Standard Edition (SE)

ListUI


javax.swing.plaf

Class ListUI

    • Constructor Detail

      • ListUI

        public ListUI()
    • Method Detail

      • locationToIndex

        public abstract int locationToIndex(JList list,
                                            Point location)
        Returns the cell index in the specified JList 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 by getCellBounds. This method returns -1 if the list's model is empty.
        Parameters:
        list - the list
        location - the coordinates of the point
        Returns:
        the cell index closest to the given location, or -1
        Throws:
        NullPointerException - if location is null
      • indexToLocation

        public abstract Point indexToLocation(JList list,
                                              int index)
        Returns the origin in the given JList, of the specified item, in the list's coordinate system. Returns null if the index isn't valid.
        Parameters:
        list - the list
        index - the cell index
        Returns:
        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:
        list - the list
        index1 - the first index in the range
        index2 - the second index in the range
        Returns:
        the bounding rectangle for the range of cells, or null


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