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/*
* Copyright (c) 2012, Metron, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Metron, Inc. nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL METRON, INC. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.metsci.glimpse.layout;
import static com.metsci.glimpse.util.GeneralUtils.*;
import static net.miginfocom.layout.ConstraintParser.parseColumnConstraints;
import static net.miginfocom.layout.ConstraintParser.parseComponentConstraint;
import static net.miginfocom.layout.ConstraintParser.parseLayoutConstraint;
import static net.miginfocom.layout.ConstraintParser.parseRowConstraints;
import static net.miginfocom.layout.ConstraintParser.prepare;
import java.util.ArrayList;
import java.util.IdentityHashMap;
import java.util.Iterator;
import java.util.Map;
import net.miginfocom.layout.AC;
import net.miginfocom.layout.CC;
import net.miginfocom.layout.ComponentWrapper;
import net.miginfocom.layout.Grid;
import net.miginfocom.layout.LC;
import net.miginfocom.layout.LayoutCallback;
public class GlimpseLayoutManagerMig implements GlimpseLayoutManager
{
private LC lc = null;
private AC cc = null;
private AC rc = null;
private ArrayList callbackList = newArrayList( );
private int cacheHash = -1;
private Grid gridCache = null;
private Map childDataCache = new IdentityHashMap( 8 );
private Map childConstraintCache = newHashMap( );
public GlimpseLayoutManagerMig( )
{
this( "", "", "" );
}
public GlimpseLayoutManagerMig( LC layoutConstraints, AC colConstraints, AC rowConstraints )
{
lc = layoutConstraints;
cc = colConstraints;
rc = rowConstraints;
}
public GlimpseLayoutManagerMig( String layoutConstraints, String colConstraints, String rowConstraints )
{
setLayoutConstraints( layoutConstraints );
setColumnConstraints( colConstraints );
setRowConstraints( rowConstraints );
}
public void setLayoutConstraints( String s )
{
lc = parseLayoutConstraint( prepare( s ) );
gridCache = null;
}
public void setColumnConstraints( String s )
{
cc = parseColumnConstraints( prepare( s ) );
gridCache = null;
}
public void setRowConstraints( String s )
{
rc = parseRowConstraints( prepare( s ) );
gridCache = null;
}
private void setChildConstraint( GlimpseLayoutDelegate child, Object constraint, boolean noCheck )
{
if ( noCheck == false && childDataCache.containsKey( child ) == false ) throw new IllegalArgumentException( "Component must already be added to parent!" );
if ( constraint == null || constraint instanceof String )
{
String ccString = prepare( ( String ) constraint );
childDataCache.put( child, constraint );
childConstraintCache.put( child, parseComponentConstraint( ccString ) );
}
else if ( constraint instanceof CC )
{
childDataCache.put( child, constraint );
childConstraintCache.put( child, ( CC ) constraint );
}
else
{
throw new IllegalArgumentException( "Constraint must be String or ComponentConstraint: " + constraint.getClass( ).toString( ) );
}
gridCache = null;
}
public void addLayoutCallback( LayoutCallback callback )
{
if ( callback == null ) throw new NullPointerException( );
callbackList.add( callback );
}
public void removeLayoutCallback( LayoutCallback callback )
{
if ( callbackList != null ) callbackList.remove( callback );
}
private void checkCache( GlimpseLayoutDelegate parent )
{
checkChildCache( parent );
int hash = parent.getWidth( ) ^ parent.getHeight( );
for ( Iterator it = childConstraintCache.keySet( ).iterator( ); it.hasNext( ); )
{
hash += it.next( ).getLayoutHashCode( );
}
if ( hash != cacheHash )
{
gridCache = null;
cacheHash = hash;
}
if ( gridCache == null )
{
gridCache = new Grid( parent, lc, rc, cc, childConstraintCache, callbackList );
}
}
private boolean checkChildCache( GlimpseLayoutDelegate parent )
{
ComponentWrapper[] comps = parent.getComponents( );
boolean changed = comps.length != childDataCache.size( );
if ( !changed )
{
for ( int i = 0; i < comps.length; i++ )
{
GlimpseLayoutDelegate c = ( GlimpseLayoutDelegate ) comps[i];
if ( childDataCache.get( c ) == null && c.getLayoutData( ) == null )
{
continue;
}
if ( childDataCache.get( c ) != c.getLayoutData( ) )
{
changed = true;
break;
}
}
}
if ( changed )
{
childDataCache.clear( );
for ( int i = 0; i < comps.length; i++ )
{
GlimpseLayoutDelegate c = ( GlimpseLayoutDelegate ) comps[i];
setChildConstraint( c, c.getLayoutData( ), true );
}
}
return changed;
}
@Override
public void layout( GlimpseLayoutDelegate parent )
{
checkCache( parent );
int[] b = new int[] { parent.getX( ), parent.getY( ), parent.getWidth( ), parent.getHeight( ) };
boolean layoutAgain = gridCache.layout( b, lc.getAlignX( ), lc.getAlignY( ), false, true );
if ( layoutAgain )
{
gridCache = null;
checkCache( parent );
gridCache.layout( b, lc.getAlignX( ), lc.getAlignY( ), false, false );
}
}
}
