Graphical User Interfaces - Java - page 616

/** The height of each row, as found by computLayoutSize(). */
int

int [] heights ;

/** Compute the size of the whole mess. Serves as the guts of
* preferredLayoutSize() and minimumLayoutSize().
* @param parent The container in which to do the layout.
* @param hp The horizontal padding (may be zero)
* @param vp The Vertical Padding (may be zero).
*/
protected protected Dimension computeLayoutSize ( Container parent , int int hp , int int vp ) {

iif (! validWidths )
return

null ;
Component [] components = parent . getComponents ();
int

return null

int preferredWidth = 0 , preferredHeight = 0 ;
widths = new new int int [ COLUMNS ];

heights = new int [ components . length / COLUMNS ];

// System.out.println("Grid: " + widths.length + ", " + heights.length);

new int

int int i ;

// Pass One: Compute largest widths and heights.
for for ( i = 0 ; i < components . length ; i ++) {

int

int row = i / widthPercentages . length ;
int int col = i % widthPercentages . length ;

Component c = components [ i ];
Dimension d = c . getPreferredSize ();
widths [ col ] = Math . max ( widths [ col ], d . width );
heights [ row ] = Math . max ( heights [ row ], d . height );

}

// Pass two: agregate them.
for for ( i = 0 ; i < widths . length ; i ++)

preferredWidth += widths [ i ] + hp ;

for for ( i = 0 ; i < heights . length ; i ++)

preferredHeight += heights [ i ] + vp ;

// Finally, pass the sums back as the actual size.
return

return new new Dimension ( preferredWidth , preferredHeight );

}

/** Lays out the container in the specified panel. This is a row-column
* type layout; find x, y, width and height of each Component.
* @param parent The Container whose children we are laying out.
*/
public

public void void layoutContainer ( Container parent ) {

Debug . println ( "layout" , "layoutContainer:" );
iif (! validWidths )