/*
* Copyright (c) 2007, 2011, 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
* or visit www.oracle.com if you need additional information or have any
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*/
package com.sun.tools.visualvm.modules.appui.welcome;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.border.EmptyBorder;
/**
*
* @author S. Aubrecht
*/
public abstract class LinkButton extends JButton
implements Constants, MouseListener, ActionListener, FocusListener {
private boolean underline = false;
public LinkButton( String label ) {
super( label );
setForeground( Utils.getColor(LINK_COLOR) );
setFont( BUTTON_FONT );
setBorder( new EmptyBorder(1, 1, 1, 1) );
setCursor( Cursor.getPredefinedCursor(Cursor.HAND_CURSOR) );
setHorizontalAlignment( JLabel.LEFT );
addMouseListener(this);
setFocusable( true );
setMargin( new Insets(0, 0, 0, 0) );
setBorderPainted( false );
setFocusPainted( false );
setRolloverEnabled( true );
setContentAreaFilled( false );
addActionListener( this );
addFocusListener( this );
}
public void mouseClicked(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
}
public void mouseReleased(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
if( isEnabled() ) {
underline = true;
setForeground( Utils.getColor(LINK_IN_FOCUS_COLOR) );
repaint();
onMouseEntered( e );
setForeground( Utils.getColor( MOUSE_OVER_LINK_COLOR ) );
}
}
public void mouseExited(MouseEvent e) {
if( isEnabled() ) {
underline = false;
setForeground( Utils.getColor(isVisited() ? VISITED_LINK_COLOR : LINK_COLOR) );
repaint();
onMouseExited( e );
}
}
protected void paintComponent(Graphics g) {
Graphics2D g2 = Utils.prepareGraphics( g );
super.paintComponent(g2);
Dimension size = getSize();
if( hasFocus() && isEnabled() ) {
g2.setStroke( LINK_IN_FOCUS_STROKE );
g2.setColor( Utils.getColor(LINK_IN_FOCUS_COLOR) );
g2.drawRect( 0, 0, size.width - 1, size.height - 1 );
}
}
public void focusLost(FocusEvent e) {
}
public void focusGained(FocusEvent e) {
Rectangle rect = getBounds();
rect.grow( 0, FONT_SIZE );
scrollRectToVisible( rect );
}
protected void onMouseExited(MouseEvent e) {
}
protected void onMouseEntered(MouseEvent e) {
}
@Override
public void paint(Graphics g) {
super.paint(g);
if( underline && isEnabled() ) {
Font f = getFont();
FontMetrics fm = getFontMetrics(f);
int iconWidth = 0;
if( null != getIcon() ) {
iconWidth = getIcon().getIconWidth()+getIconTextGap();
}
int x1 = iconWidth;
int y1 = fm.getHeight();
int x2 = fm.stringWidth(getText()) + iconWidth;
if( getText().length() > 0 )
g.drawLine(x1, y1, x2, y1);
}
}
protected boolean isVisited() {
return false;
}
}