/*
* Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package javax.swing.plaf.basic;
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.plaf.*;
import java.awt.*;
import java.awt.event.*;
/**
* BasicPanel implementation
*
* @author Steve Wilson
*/
public class BasicPanelUI extends PanelUI {
// Shared UI object
private static PanelUI panelUI;
/**
* Returns an instance of {@code BasicPanelUI}.
*
* @param c a component
* @return an instance of {@code BasicPanelUI}
*/
public static ComponentUI createUI(JComponent c) {
if(panelUI == null) {
panelUI = new BasicPanelUI();
}
return panelUI;
}
public void installUI(JComponent c) {
JPanel p = (JPanel)c;
super.installUI(p);
installDefaults(p);
}
public void uninstallUI(JComponent c) {
JPanel p = (JPanel)c;
uninstallDefaults(p);
super.uninstallUI(c);
}
/**
* Method for installing panel properties.
*
* @param p an instance of {@code JPanel}
*/
protected void installDefaults(JPanel p) {
LookAndFeel.installColorsAndFont(p,
"Panel.background",
"Panel.foreground",
"Panel.font");
LookAndFeel.installBorder(p,"Panel.border");
LookAndFeel.installProperty(p, "opaque", Boolean.TRUE);
}
/**
* Method for uninstalling panel properties.
*
* @param p an instance of {@code JPanel}
*/
protected void uninstallDefaults(JPanel p) {
LookAndFeel.uninstallBorder(p);
}
/**
* Returns the baseline.
*
* @throws NullPointerException {@inheritDoc}
* @throws IllegalArgumentException {@inheritDoc}
* @see javax.swing.JComponent#getBaseline(int, int)
* @since 1.6
*/
public int getBaseline(JComponent c, int width, int height) {
super.getBaseline(c, width, height);
Border border = c.getBorder();
if (border instanceof AbstractBorder) {
return ((AbstractBorder)border).getBaseline(c, width, height);
}
return -1;
}
/**
* Returns an enum indicating how the baseline of the component
* changes as the size changes.
*
* @throws NullPointerException {@inheritDoc}
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