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WebLaf is a Java Swing Look and Feel and extended components library for cross-platform applications
/*
* This file is part of WebLookAndFeel library.
*
* WebLookAndFeel library is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* WebLookAndFeel library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with WebLookAndFeel library. If not, see constraints = new HashMap ();
// Component side margins (this one is additional to the container margins)
protected Insets componentMargin = null;
// Overlay side margins (this one is additional to the container margins)
protected Insets overlayMargin = null;
public OverlayLayout ()
{
super ();
}
public Insets getComponentMargin ()
{
return componentMargin;
}
public void setComponentMargin ( final int margin )
{
setComponentMargin ( margin, margin, margin, margin );
}
public void setComponentMargin ( final int top, final int left, final int bottom, final int right )
{
setComponentMargin ( new Insets ( top, left, bottom, right ) );
}
public void setComponentMargin ( final Insets margin )
{
this.componentMargin = margin;
}
public Insets getOverlayMargin ()
{
return overlayMargin;
}
public void setOverlayMargin ( final int margin )
{
setOverlayMargin ( margin, margin, margin, margin );
}
public void setOverlayMargin ( final int top, final int left, final int bottom, final int right )
{
setOverlayMargin ( new Insets ( top, left, bottom, right ) );
}
public void setOverlayMargin ( final Insets overlayMargin )
{
this.overlayMargin = overlayMargin;
}
@Override
public void addComponent ( final Component component, final Object constraints )
{
final String value = ( String ) constraints;
if ( value == null || !value.equals ( COMPONENT ) && !value.equals ( OVERLAY ) )
{
throw new IllegalArgumentException ( "Cannot add to layout: constraint must be 'COMPONENT' or 'OVERLAY' string" );
}
this.constraints.put ( component, value );
}
@Override
public void removeComponent ( final Component component )
{
this.constraints.remove ( component );
}
@Override
public Dimension preferredLayoutSize ( final Container parent )
{
final Insets bi = parent.getInsets ();
final Insets ci = getActualComponentInsets ( parent );
Dimension ps = new Dimension ();
for ( final Component component : parent.getComponents () )
{
final String constraint = constraints.get ( component );
if ( constraint != null && constraint.equals ( COMPONENT ) )
{
final Dimension cps = component.getPreferredSize ();
ps = SwingUtils.max ( ps, new Dimension ( bi.left + ci.left + cps.width + ci.right + bi.right,
bi.top + ci.top + cps.height + ci.bottom + bi.bottom ) );
}
}
return ps;
}
protected Insets getActualComponentInsets ( final Container parent )
{
return componentMargin != null ?
( parent.getComponentOrientation ().isLeftToRight () ? componentMargin : SwingUtils.toRTL ( componentMargin ) ) :
new Insets ( 0, 0, 0, 0 );
}
@Override
public void layoutContainer ( final Container parent )
{
final Insets bi = parent.getInsets ();
final Insets ci = getActualComponentInsets ( parent );
for ( final Component component : parent.getComponents () )
{
final String constraint = constraints.get ( component );
if ( constraint != null )
{
final int pw = parent.getWidth ();
final int ph = parent.getHeight ();
if ( constraint.equals ( COMPONENT ) )
{
component.setBounds ( bi.left + ci.left, bi.top + ci.top, pw - bi.left - bi.right - ci.left - ci.right,
ph - bi.top - bi.bottom - ci.top - ci.bottom );
}
else if ( constraint.equals ( OVERLAY ) )
{
final WebOverlay webOverlay = ( WebOverlay ) parent;
final OverlayData data = webOverlay.getOverlayData ( component );
final Insets om = overlayMargin != null ? overlayMargin : new Insets ( 0, 0, 0, 0 );
if ( data.getLocation ().equals ( OverlayLocation.fill ) )
{
component.setBounds ( bi.left + om.left, bi.top + om.top, pw - bi.left - om.left - bi.right - om.right,
ph - bi.top - om.top - bi.bottom - om.bottom );
}
else if ( data.getLocation ().equals ( OverlayLocation.align ) )
{
final Dimension ps = component.getPreferredSize ();
final int x;
final int halign = getActualHalign ( component, data );
if ( halign == LEFT || halign == -1 )
{
x = bi.left + om.left;
}
else if ( halign == RIGHT )
{
x = pw - bi.right - om.right - ps.width;
}
else
{
x = pw / 2 - ps.width / 2;
}
final int y;
final int valign = data.getValign ();
if ( valign == TOP || valign == -1 )
{
y = bi.top + om.top;
}
else if ( valign == BOTTOM )
{
y = ph - bi.bottom - om.bottom - ps.height;
}
else
{
y = ph / 2 - ps.height / 2;
}
component.setBounds ( x, y, halign == -1 ? pw - bi.left - om.left - bi.right - om.right : ps.width,
valign == -1 ? ph - bi.top - om.top - bi.bottom - om.bottom : ps.height );
}
else
{
component.setBounds ( data.getRectangleProvider ().provide () );
}
}
}
}
}
protected int getActualHalign ( final Component component, final OverlayData data )
{
final boolean ltr = component.getComponentOrientation ().isLeftToRight ();
if ( data.getHalign () == LEADING )
{
return ltr ? LEFT : RIGHT;
}
else if ( data.getHalign () == TRAILING )
{
return ltr ? RIGHT : LEFT;
}
else
{
return data.getHalign ();
}
}
}