/*
* 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 <http://www.gnu.org/licenses/>.
*/
package com.alee.laf.text;
import com.alee.extended.layout.AbstractLayoutManager;
import com.alee.utils.collection.ValuesTable;
import javax.swing.plaf.TextUI;
import javax.swing.text.JTextComponent;
import java.awt.*;
/**
* User: mgarin Date: 14.12.12 Time: 16:56
*/
public class TextComponentLayout extends AbstractLayoutManager
{
// Positions component at the leading side of the field
public static final String LEADING = "LEADING";
// Positions component at the trailing side of the field
public static final String TRAILING = "TRAILING";
// Empty insets
private static final Insets emptyInsets = new Insets ( 0, 0, 0, 0 );
// todo Make weak references
// Saved layout constraints
private ValuesTable<Component, String> constraints = new ValuesTable<Component, String> ();
// Text component
private JTextComponent textComponent;
public TextComponentLayout ( JTextComponent textComponent )
{
super ();
this.textComponent = textComponent;
}
/**
* Standard LayoutManager methods
*/
/**
* {@inheritDoc}
*/
@Override
public void addComponent ( Component component, Object constraints )
{
String value = ( String ) constraints;
if ( value == null || !value.equals ( LEADING ) && !value.equals ( TRAILING ) )
{
throw new IllegalArgumentException ( "Cannot add to layout: constraint must be 'LEADING' or 'TRAILING' string" );
}
this.constraints.put ( component, value );
}
/**
* {@inheritDoc}
*/
@Override
public void removeComponent ( Component component )
{
this.constraints.remove ( component );
}
/**
* {@inheritDoc}
*/
@Override
public Dimension preferredLayoutSize ( Container parent )
{
Insets b = getInsets ( parent );
Dimension l = constraints.containsValue ( LEADING ) ? constraints.getKey ( LEADING ).getPreferredSize () : new Dimension ();
Dimension t = constraints.containsValue ( TRAILING ) ? constraints.getKey ( TRAILING ).getPreferredSize () : new Dimension ();
return new Dimension ( b.left + l.width + t.width + b.right, b.top + Math.max ( l.height, t.height ) + b.bottom );
}
/**
* {@inheritDoc}
*/
@Override
public void layoutContainer ( Container parent )
{
boolean ltr = parent.getComponentOrientation ().isLeftToRight ();
Insets b = getInsets ( parent );
if ( constraints.containsValue ( LEADING ) )
{
Component leading = constraints.getKey ( LEADING );
int w = leading.getPreferredSize ().width;
if ( ltr )
{
leading.setBounds ( b.left - w, b.top, w, parent.getHeight () - b.top - b.bottom );
}
else
{
leading.setBounds ( parent.getWidth () - b.right, b.top, w, parent.getHeight () - b.top - b.bottom );
}
}
if ( constraints.containsValue ( TRAILING ) )
{
Component trailing = constraints.getKey ( TRAILING );
int w = trailing.getPreferredSize ().width;
if ( ltr )
{
trailing.setBounds ( parent.getWidth () - b.right, b.top, w, parent.getHeight () - b.top - b.bottom );
}
else
{
trailing.setBounds ( b.left - w, b.top, w, parent.getHeight () - b.top - b.bottom );
}
}
}
/**
* Actual border
*/
private Insets getInsets ( Container parent )
{
Insets b = parent.getInsets ();
Insets fm = getFieldMargin ();
boolean ltr = parent.getComponentOrientation ().isLeftToRight ();
return new Insets ( b.top - fm.top, b.left - ( ltr ? fm.left : fm.right ), b.bottom - fm.bottom,
b.right - ( ltr ? fm.right : fm.left ) );
}
private Insets getFieldMargin ()
{
TextUI ui = textComponent.getUI ();
if ( ui instanceof WebTextFieldUI )
{
return ( ( WebTextFieldUI ) ui ).getFieldMargin ();
}
else if ( ui instanceof WebPasswordFieldUI )
{
return ( ( WebPasswordFieldUI ) ui ).getFieldMargin ();
}
else
{
return emptyInsets;
}
}
}