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/*
* 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 .
*/
package com.alee.extended.layout;
import java.awt.*;
/**
* @author Mikle Garin
*/
public class VerticalFlowLayout extends AbstractLayoutManager
{
/**
* todo 1. Return possibility to wrap columns?
* todo 2. Vertical alignment (in column)?
*/
/**
* Description of the Field
*/
public final static int TOP = 0;
public final static int MIDDLE = 1;
public final static int BOTTOM = 2;
protected int align;
protected int hgap;
protected int vgap;
protected boolean hfill;
protected boolean vfill;
/**
* Construct a new VerticalFlowLayout with a middle alignemnt, and the fill to edge flag set.
*/
public VerticalFlowLayout ()
{
this ( TOP, 0, 0, true, false );
}
/**
* Construct a new VerticalFlowLayout with a middle alignemnt.
*/
public VerticalFlowLayout ( final boolean hfill, final boolean vfill )
{
this ( TOP, 0, 0, hfill, vfill );
}
/**
* Construct a new VerticalFlowLayout with a middle alignemnt.
*/
public VerticalFlowLayout ( final int hgap, final int vgap )
{
this ( TOP, hgap, vgap, true, false );
}
/**
* Construct a new VerticalFlowLayout with a middle alignemnt.
*/
public VerticalFlowLayout ( final int align, final int hgap, final int vgap )
{
this ( align, hgap, vgap, true, false );
}
/**
* Construct a new VerticalFlowLayout with a middle alignemnt.
*/
public VerticalFlowLayout ( final int align )
{
this ( align, 0, 0, true, false );
}
/**
* Construct a new VerticalFlowLayout.
*/
public VerticalFlowLayout ( final int align, final boolean hfill, final boolean vfill )
{
this ( align, 0, 0, hfill, vfill );
}
/**
* Construct a new VerticalFlowLayout.
*/
public VerticalFlowLayout ( final int hgap, final int vgap, final boolean hfill, final boolean vfill )
{
this ( TOP, hgap, vgap, hfill, vfill );
}
/**
* Construct a new VerticalFlowLayout.
*/
public VerticalFlowLayout ( final int align, final int hgap, final int vgap, final boolean hfill, final boolean vfill )
{
super ();
this.align = align;
this.hgap = hgap;
this.vgap = vgap;
this.hfill = hfill;
this.vfill = vfill;
}
public void setHgap ( final int hgap )
{
this.hgap = hgap;
}
public void setVgap ( final int vgap )
{
this.vgap = vgap;
}
/**
* Sets the VerticalFill attribute of the VerticalLayout object
*/
public void setVerticalFill ( final boolean vfill )
{
this.vfill = vfill;
}
/**
* Sets the HorizontalFill attribute of the VerticalLayout object
*/
public void setHorizontalFill ( final boolean hfill )
{
this.hfill = hfill;
}
public int getHgap ()
{
return hgap;
}
public int getVgap ()
{
return vgap;
}
/**
* Gets the VerticalFill attribute of the VerticalLayout object
*/
public boolean getVerticalFill ()
{
return vfill;
}
/**
* Gets the HorizontalFill attribute of the VerticalLayout object
*/
public boolean getHorizontalFill ()
{
return hfill;
}
@Override
public Dimension preferredLayoutSize ( final Container target )
{
final Dimension tarsiz = new Dimension ( 0, 0 );
for ( int i = 0; i < target.getComponentCount (); i++ )
{
final Component m = target.getComponent ( i );
if ( m.isVisible () )
{
final Dimension d = m.getPreferredSize ();
tarsiz.width = Math.max ( tarsiz.width, d.width );
if ( i > 0 )
{
tarsiz.height += vgap;
}
tarsiz.height += d.height;
}
}
final Insets insets = target.getInsets ();
tarsiz.width += insets.left + insets.right;
tarsiz.height += insets.top + insets.bottom;
return tarsiz;
}
@Override
public Dimension minimumLayoutSize ( final Container target )
{
final Dimension tarsiz = new Dimension ( 0, 0 );
for ( int i = 0; i < target.getComponentCount (); i++ )
{
final Component m = target.getComponent ( i );
if ( m.isVisible () )
{
final Dimension d = m.getMinimumSize ();
tarsiz.width = Math.max ( tarsiz.width, d.width );
if ( i > 0 )
{
tarsiz.height += vgap;
}
tarsiz.height += d.height;
}
}
final Insets insets = target.getInsets ();
tarsiz.width += insets.left + insets.right;
tarsiz.height += insets.top + insets.bottom;
return tarsiz;
}
@Override
public void layoutContainer ( final Container target )
{
final Insets insets = target.getInsets ();
final Dimension size = target.getSize ();
final int maxwidth = size.width - ( insets.left + insets.right );
final int maxheight = size.height - ( insets.top + insets.bottom );
final int numcomp = target.getComponentCount ();
final int pheight = !vfill && align != TOP ? calculatePreferredHeight ( target ) : 0;
int y = 0;
for ( int i = 0; i < numcomp; i++ )
{
final Component component = target.getComponent ( i );
if ( component.isVisible () )
{
final Dimension ps = component.getPreferredSize ();
final int w = hfill ? maxwidth : Math.min ( maxwidth, ps.width );
final int h = vfill && i == numcomp - 1 ? maxheight - y : ps.height;
if ( vfill )
{
component.setBounds ( insets.left, insets.top + y, w, h );
}
else
{
switch ( align )
{
case MIDDLE:
{
component.setBounds ( insets.left, insets.top + maxheight / 2 - pheight / 2 + y, w, ps.height );
break;
}
case BOTTOM:
{
component.setBounds ( insets.left, size.height - insets.bottom - pheight + y, w, ps.height );
break;
}
default:
{
component.setBounds ( insets.left, insets.top + y, w, ps.height );
break;
}
}
}
y += h + vgap;
}
}
}
/**
* Calculates preferred height required for components within this layout.
*
* @param target container to calculate components preferred height for
* @return preferred height required for components within this layout
*/
protected int calculatePreferredHeight ( final Container target )
{
int ph = 0;
for ( int i = 0; i < target.getComponentCount (); i++ )
{
ph += target.getComponent ( i ).getPreferredSize ().height;
if ( i < target.getComponentCount () - 1 )
{
ph += vgap;
}
}
return ph;
}
}
