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/*
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* Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package javax.swing.plaf.basic;
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import java.awt.Dimension;
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import java.awt.Graphics;
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import java.awt.Color;
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import javax.swing.*;
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import javax.swing.plaf.UIResource;
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/**
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* JButton object that draws a scaled Arrow in one of the cardinal directions.
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* <p>
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* <strong>Warning:</strong>
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* Serialized objects of this class will not be compatible with
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* future Swing releases. The current serialization support is
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* appropriate for short term storage or RMI between applications running
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* the same version of Swing. As of 1.4, support for long term storage
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* of all JavaBeans<sup><font size="-2">TM</font></sup>
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* has been added to the <code>java.beans</code> package.
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* Please see {@link java.beans.XMLEncoder}.
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*
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* @author David Kloba
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*/
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public class BasicArrowButton extends JButton implements SwingConstants
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{
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/**
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* The direction of the arrow. One of
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* {@code SwingConstants.NORTH}, {@code SwingConstants.SOUTH},
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* {@code SwingConstants.EAST} or {@code SwingConstants.WEST}.
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*/
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protected int direction;
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private Color shadow;
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private Color darkShadow;
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private Color highlight;
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/**
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* Creates a {@code BasicArrowButton} whose arrow
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* is drawn in the specified direction and with the specified
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* colors.
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*
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* @param direction the direction of the arrow; one of
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* {@code SwingConstants.NORTH}, {@code SwingConstants.SOUTH},
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* {@code SwingConstants.EAST} or {@code SwingConstants.WEST}
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* @param background the background color of the button
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* @param shadow the color of the shadow
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* @param darkShadow the color of the dark shadow
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* @param highlight the color of the highlight
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* @since 1.4
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*/
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public BasicArrowButton(int direction, Color background, Color shadow,
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Color darkShadow, Color highlight) {
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super();
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setRequestFocusEnabled(false);
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setDirection(direction);
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setBackground(background);
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this.shadow = shadow;
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this.darkShadow = darkShadow;
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this.highlight = highlight;
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}
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/**
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* Creates a {@code BasicArrowButton} whose arrow
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* is drawn in the specified direction.
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*
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* @param direction the direction of the arrow; one of
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* {@code SwingConstants.NORTH}, {@code SwingConstants.SOUTH},
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* {@code SwingConstants.EAST} or {@code SwingConstants.WEST}
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*/
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public BasicArrowButton(int direction) {
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this(direction, UIManager.getColor("control"), UIManager.getColor("controlShadow"),
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UIManager.getColor("controlDkShadow"), UIManager.getColor("controlLtHighlight"));
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}
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/**
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* Returns the direction of the arrow.
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*/
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public int getDirection() {
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return direction;
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}
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/**
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* Sets the direction of the arrow.
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*
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* @param direction the direction of the arrow; one of
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* of {@code SwingConstants.NORTH},
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* {@code SwingConstants.SOUTH},
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* {@code SwingConstants.EAST} or {@code SwingConstants.WEST}
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*/
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public void setDirection(int direction) {
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this.direction = direction;
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}
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public void paint(Graphics g) {
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Color origColor;
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boolean isPressed, isEnabled;
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int w, h, size;
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w = getSize().width;
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h = getSize().height;
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origColor = g.getColor();
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isPressed = getModel().isPressed();
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isEnabled = isEnabled();
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g.setColor(getBackground());
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g.fillRect(1, 1, w-2, h-2);
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/// Draw the proper Border
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if (getBorder() != null && !(getBorder() instanceof UIResource)) {
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paintBorder(g);
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} else if (isPressed) {
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g.setColor(shadow);
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g.drawRect(0, 0, w-1, h-1);
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} else {
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// Using the background color set above
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g.drawLine(0, 0, 0, h-1);
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g.drawLine(1, 0, w-2, 0);
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g.setColor(highlight); // inner 3D border
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g.drawLine(1, 1, 1, h-3);
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g.drawLine(2, 1, w-3, 1);
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g.setColor(shadow); // inner 3D border
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g.drawLine(1, h-2, w-2, h-2);
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g.drawLine(w-2, 1, w-2, h-3);
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g.setColor(darkShadow); // black drop shadow __|
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g.drawLine(0, h-1, w-1, h-1);
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g.drawLine(w-1, h-1, w-1, 0);
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}
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// If there's no room to draw arrow, bail
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if(h < 5 || w < 5) {
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g.setColor(origColor);
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return;
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}
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if (isPressed) {
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g.translate(1, 1);
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}
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// Draw the arrow
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size = Math.min((h - 4) / 3, (w - 4) / 3);
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size = Math.max(size, 2);
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paintTriangle(g, (w - size) / 2, (h - size) / 2,
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size, direction, isEnabled);
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// Reset the Graphics back to it's original settings
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if (isPressed) {
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g.translate(-1, -1);
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}
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g.setColor(origColor);
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}
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/**
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* Returns the preferred size of the {@code BasicArrowButton}.
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*
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* @return the preferred size
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*/
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public Dimension getPreferredSize() {
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return new Dimension(16, 16);
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}
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/**
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* Returns the minimum size of the {@code BasicArrowButton}.
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*
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* @return the minimum size
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*/
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public Dimension getMinimumSize() {
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return new Dimension(5, 5);
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}
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/**
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* Returns the maximum size of the {@code BasicArrowButton}.
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*
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* @return the maximum size
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*/
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public Dimension getMaximumSize() {
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return new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE);
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}
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/**
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* Returns whether the arrow button should get the focus.
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* {@code BasicArrowButton}s are used as a child component of
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* composite components such as {@code JScrollBar} and
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* {@code JComboBox}. Since the composite component typically gets the
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* focus, this method is overriden to return {@code false}.
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*
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* @return {@code false}
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*/
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public boolean isFocusTraversable() {
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return false;
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}
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/**
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* Paints a triangle.
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*
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* @param g the {@code Graphics} to draw to
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* @param x the x coordinate
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* @param y the y coordinate
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* @param size the size of the triangle to draw
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* @param direction the direction in which to draw the arrow;
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* one of {@code SwingConstants.NORTH},
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* {@code SwingConstants.SOUTH}, {@code SwingConstants.EAST} or
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* {@code SwingConstants.WEST}
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* @param isEnabled whether or not the arrow is drawn enabled
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*/
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public void paintTriangle(Graphics g, int x, int y, int size,
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int direction, boolean isEnabled) {
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Color oldColor = g.getColor();
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int mid, i, j;
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j = 0;
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size = Math.max(size, 2);
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mid = (size / 2) - 1;
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g.translate(x, y);
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if(isEnabled)
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g.setColor(darkShadow);
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else
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g.setColor(shadow);
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switch(direction) {
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case NORTH:
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for(i = 0; i < size; i++) {
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g.drawLine(mid-i, i, mid+i, i);
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}
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if(!isEnabled) {
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g.setColor(highlight);
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g.drawLine(mid-i+2, i, mid+i, i);
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}
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break;
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case SOUTH:
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if(!isEnabled) {
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g.translate(1, 1);
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g.setColor(highlight);
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for(i = size-1; i >= 0; i--) {
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g.drawLine(mid-i, j, mid+i, j);
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j++;
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}
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g.translate(-1, -1);
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g.setColor(shadow);
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}
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j = 0;
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for(i = size-1; i >= 0; i--) {
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g.drawLine(mid-i, j, mid+i, j);
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j++;
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}
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break;
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case WEST:
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for(i = 0; i < size; i++) {
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g.drawLine(i, mid-i, i, mid+i);
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}
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if(!isEnabled) {
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g.setColor(highlight);
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g.drawLine(i, mid-i+2, i, mid+i);
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}
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break;
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case EAST:
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if(!isEnabled) {
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g.translate(1, 1);
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g.setColor(highlight);
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for(i = size-1; i >= 0; i--) {
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g.drawLine(j, mid-i, j, mid+i);
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j++;
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}
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g.translate(-1, -1);
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g.setColor(shadow);
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}
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j = 0;
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for(i = size-1; i >= 0; i--) {
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g.drawLine(j, mid-i, j, mid+i);
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j++;
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}
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break;
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}
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g.translate(-x, -y);
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g.setColor(oldColor);
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}
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}
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