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<A NAME="getPreferredScrollableViewportSize()"><!-- --></A><H3>
getPreferredScrollableViewportSize</H3>
<PRE>
public <A HREF="../../java/awt/Dimension.html">Dimension</A> <B>getPreferredScrollableViewportSize</B>()</PRE>
<DL>
<DD>Returns the preferred size of the viewport for a view component.
 For example the preferredSize of a JList component is the size
 required to acommodate all of the cells in its list however the
 value of preferredScrollableViewportSize is the size required for
 JList.getVisibleRowCount() rows.   A component without any properties
 that would effect the viewport size should just return 
 getPreferredSize() here.<DD><DL>
<DT><B>Returns:</B><DD>The preferredSize of a JViewport whose view is this Scrollable.<DT><B>See Also: </B><DD><A HREF="../../javax/swing/JComponent.html#getPreferredSize()"><CODE>JComponent.getPreferredSize()</CODE></A></DL>
</DD>
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<A NAME="getScrollableUnitIncrement(java.awt.Rectangle, int, int)"><!-- --></A><H3>
getScrollableUnitIncrement</H3>
<PRE>
public int <B>getScrollableUnitIncrement</B>(<A HREF="../../java/awt/Rectangle.html">Rectangle</A>&nbsp;visibleRect,
                                      int&nbsp;orientation,
                                      int&nbsp;direction)</PRE>
<DL>
<DD>Components that display logical rows or columns should compute
 the scroll increment that will completely expose one new row
 or column, depending on the value of orientation.  Ideally, 
 components should handle a partially exposed row or column by 
 returning the distance required to completely expose the item.
 <p>
 Scrolling containers, like JScrollPane, will use this method
 each time the user requests a unit scroll.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>visibleRect</CODE> - The view area visible within the viewport<DD><CODE>orientation</CODE> - Either SwingConstants.VERTICAL or SwingConstants.HORIZONTAL.<DD><CODE>direction</CODE> - Less than zero to scroll up/left, greater than zero for down/right.<DT><B>Returns:</B><DD>The "unit" increment for scrolling in the specified direction<DT><B>See Also: </B><DD><A HREF="../../javax/swing/JScrollBar.html#setUnitIncrement(int)"><CODE>JScrollBar.setUnitIncrement(int)</CODE></A></DL>
</DD>
</DL>
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<A NAME="getScrollableBlockIncrement(java.awt.Rectangle, int, int)"><!-- --></A><H3>
getScrollableBlockIncrement</H3>
<PRE>
public int <B>getScrollableBlockIncrement</B>(<A HREF="../../java/awt/Rectangle.html">Rectangle</A>&nbsp;visibleRect,
                                       int&nbsp;orientation,
                                       int&nbsp;direction)</PRE>
<DL>
<DD>Components that display logical rows or columns should compute
 the scroll increment that will completely expose one block
 of rows or columns, depending on the value of orientation. 
 <p>
 Scrolling containers, like JScrollPane, will use this method
 each time the user requests a block scroll.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>visibleRect</CODE> - The view area visible within the viewport<DD><CODE>orientation</CODE> - Either SwingConstants.VERTICAL or SwingConstants.HORIZONTAL.<DD><CODE>direction</CODE> - Less than zero to scroll up/left, greater than zero for down/right.<DT><B>Returns:</B><DD>The "block" increment for scrolling in the specified direction.<DT><B>See Also: </B><DD><A HREF="../../javax/swing/JScrollBar.html#setBlockIncrement(int)"><CODE>JScrollBar.setBlockIncrement(int)</CODE></A></DL>
</DD>
</DL>
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<A NAME="getScrollableTracksViewportWidth()"><!-- --></A><H3>
getScrollableTracksViewportWidth</H3>
<PRE>
public boolean <B>getScrollableTracksViewportWidth</B>()</PRE>
<DL>
<DD>Return true if a viewport should always force the width of this 
 Scrollable to match the width of the viewport.  For example a noraml 
 text view that supported line wrapping would return true here, since it
 would be undesirable for wrapped lines to disappear beyond the right
 edge of the viewport.  Note that returning true for a Scrollable
 whose ancestor is a JScrollPane effectively disables horizontal
 scrolling.
 <p>
 Scrolling containers, like JViewport, will use this method each 
 time they are validated.<DD><DL>
<DT><B>Returns:</B><DD>True if a viewport should force the Scrollables width to match its own.</DL>
</DD>
</DL>
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<A NAME="getScrollableTracksViewportHeight()"><!-- --></A><H3>
getScrollableTracksViewportHeight</H3>
<PRE>
public boolean <B>getScrollableTracksViewportHeight</B>()</PRE>
<DL>
<DD>Return true if a viewport should always force the height of this 
 Scrollable to match the height of the viewport.  For example a 
 columnar text view that flowed text in left to right columns 
 could effectively disable vertical scrolling by returning
 true here.
 <p>
 Scrolling containers, like JViewport, will use this method each 
 time they are validated.<DD><DL>
<DT><B>Returns:</B><DD>True if a viewport should force the Scrollables height to match its own.</DL>
</DD>
</DL>
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