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585 lines
19 KiB
Java
585 lines
19 KiB
Java
/* MetalScrollBarUI.java
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Copyright (C) 2005, 2006, Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.swing.plaf.metal;
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import java.awt.Color;
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import java.awt.Dimension;
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import java.awt.Graphics;
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import java.awt.Insets;
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import java.awt.Rectangle;
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import java.beans.PropertyChangeEvent;
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import java.beans.PropertyChangeListener;
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import javax.swing.JButton;
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import javax.swing.JComponent;
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import javax.swing.JScrollBar;
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import javax.swing.SwingConstants;
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import javax.swing.UIManager;
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import javax.swing.plaf.ComponentUI;
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import javax.swing.plaf.basic.BasicScrollBarUI;
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/**
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* A UI delegate for the {@link JScrollBar} component.
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*/
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public class MetalScrollBarUI extends BasicScrollBarUI
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{
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/**
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* A property change handler for the UI delegate that monitors for
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* changes to the "JScrollBar.isFreeStanding" property, and updates
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* the buttons and track rendering as appropriate.
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*/
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class MetalScrollBarPropertyChangeHandler
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extends BasicScrollBarUI.PropertyChangeHandler
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{
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/**
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* Creates a new handler.
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*
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* @see #createPropertyChangeListener()
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*/
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public MetalScrollBarPropertyChangeHandler()
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{
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// Nothing to do here.
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}
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/**
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* Handles a property change event. If the event name is
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* <code>JSlider.isFreeStanding</code>, this method updates the
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* delegate, otherwise the event is passed up to the super class.
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*
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* @param e the property change event.
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*/
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public void propertyChange(PropertyChangeEvent e)
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{
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if (e.getPropertyName().equals(FREE_STANDING_PROP))
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{
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Boolean prop = (Boolean) e.getNewValue();
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isFreeStanding = prop == null ? true : prop.booleanValue();
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if (increaseButton != null)
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increaseButton.setFreeStanding(isFreeStanding);
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if (decreaseButton != null)
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decreaseButton.setFreeStanding(isFreeStanding);
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}
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else
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super.propertyChange(e);
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}
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}
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/** The name for the 'free standing' property. */
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public static final String FREE_STANDING_PROP = "JScrollBar.isFreeStanding";
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/** The minimum thumb size for a scroll bar that is not free standing. */
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private static final Dimension MIN_THUMB_SIZE = new Dimension(15, 15);
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/** The minimum thumb size for a scroll bar that is free standing. */
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private static final Dimension MIN_THUMB_SIZE_FREE_STANDING
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= new Dimension(17, 17);
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/** The button that increases the value in the scroll bar. */
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protected MetalScrollButton increaseButton;
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/** The button that decreases the value in the scroll bar. */
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protected MetalScrollButton decreaseButton;
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/**
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* The scroll bar width.
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*/
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protected int scrollBarWidth;
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/**
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* A flag that indicates whether the scroll bar is "free standing", which
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* means it has complete borders and can be used anywhere in the UI. A
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* scroll bar which is not free standing has borders missing from one
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* side, and relies on being part of another container with its own borders
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* to look right visually. */
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protected boolean isFreeStanding = true;
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/**
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* The color for the scroll bar shadow (this is read from the UIDefaults in
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* the installDefaults() method).
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*/
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Color scrollBarShadowColor;
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/**
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* Constructs a new instance of <code>MetalScrollBarUI</code>, with no
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* specific initialisation.
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*/
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public MetalScrollBarUI()
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{
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super();
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}
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/**
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* Returns a new instance of <code>MetalScrollBarUI</code>.
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*
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* @param component the component for which we return an UI instance
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*
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* @return An instance of MetalScrollBarUI
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*/
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public static ComponentUI createUI(JComponent component)
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{
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return new MetalScrollBarUI();
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}
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/**
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* Installs the defaults.
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*/
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protected void installDefaults()
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{
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// need to initialise isFreeStanding before calling the super class,
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// so that the value is set when createIncreaseButton() and
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// createDecreaseButton() are called (unless there is somewhere earlier
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// that we can do this).
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Boolean prop = (Boolean) scrollbar.getClientProperty(FREE_STANDING_PROP);
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isFreeStanding = prop == null ? true : prop.booleanValue();
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scrollBarShadowColor = UIManager.getColor("ScrollBar.shadow");
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scrollBarWidth = UIManager.getInt("ScrollBar.width");
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super.installDefaults();
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}
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/**
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* Creates a property change listener for the delegate to use. This
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* overrides the method to provide a custom listener for the
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* {@link MetalLookAndFeel} that can handle the
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* <code>JScrollBar.isFreeStanding</code> property.
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*
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* @return A property change listener.
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*/
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protected PropertyChangeListener createPropertyChangeListener()
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{
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return new MetalScrollBarPropertyChangeHandler();
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}
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/**
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* Creates a new button to use as the control at the lower end of the
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* {@link JScrollBar}. This method assigns the new button (an instance of
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* {@link MetalScrollButton} to the {@link #decreaseButton} field, and also
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* returns the button. The button width is determined by the
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* <code>ScrollBar.width</code> setting in the UI defaults.
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*
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* @param orientation the orientation of the button ({@link #NORTH},
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* {@link #SOUTH}, {@link #EAST} or {@link #WEST}).
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*
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* @return The button.
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*/
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protected JButton createDecreaseButton(int orientation)
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{
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decreaseButton = new MetalScrollButton(orientation, scrollBarWidth,
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isFreeStanding);
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return decreaseButton;
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}
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/**
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* Creates a new button to use as the control at the upper end of the
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* {@link JScrollBar}. This method assigns the new button (an instance of
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* {@link MetalScrollButton} to the {@link #increaseButton} field, and also
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* returns the button. The button width is determined by the
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* <code>ScrollBar.width</code> setting in the UI defaults.
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*
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* @param orientation the orientation of the button ({@link #NORTH},
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* {@link #SOUTH}, {@link #EAST} or {@link #WEST}).
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*
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* @return The button.
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*/
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protected JButton createIncreaseButton(int orientation)
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{
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increaseButton = new MetalScrollButton(orientation, scrollBarWidth,
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isFreeStanding);
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return increaseButton;
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}
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/**
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* Paints the track for the scrollbar.
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*
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* @param g the graphics device.
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* @param c the component.
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* @param trackBounds the track bounds.
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*/
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protected void paintTrack(Graphics g, JComponent c, Rectangle trackBounds)
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{
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g.setColor(MetalLookAndFeel.getControl());
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g.fillRect(trackBounds.x, trackBounds.y, trackBounds.width,
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trackBounds.height);
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if (scrollbar.getOrientation() == HORIZONTAL)
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paintTrackHorizontal(g, c, trackBounds.x, trackBounds.y,
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trackBounds.width, trackBounds.height);
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else
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paintTrackVertical(g, c, trackBounds.x, trackBounds.y,
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trackBounds.width, trackBounds.height);
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}
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/**
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* Paints the track for a horizontal scrollbar.
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*
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* @param g the graphics device.
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* @param c the component.
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* @param x the x-coordinate for the track bounds.
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* @param y the y-coordinate for the track bounds.
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* @param w the width for the track bounds.
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* @param h the height for the track bounds.
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*/
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private void paintTrackHorizontal(Graphics g, JComponent c,
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int x, int y, int w, int h)
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{
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if (c.isEnabled())
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{
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g.setColor(MetalLookAndFeel.getControlDarkShadow());
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g.drawLine(x, y, x, y + h - 1);
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g.drawLine(x, y, x + w - 1, y);
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g.drawLine(x + w - 1, y, x + w - 1, y + h - 1);
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g.setColor(scrollBarShadowColor);
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g.drawLine(x + 1, y + 1, x + 1, y + h - 1);
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g.drawLine(x + 1, y + 1, x + w - 2, y + 1);
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if (isFreeStanding)
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{
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g.setColor(MetalLookAndFeel.getControlDarkShadow());
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g.drawLine(x, y + h - 2, x + w - 1, y + h - 2);
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g.setColor(scrollBarShadowColor);
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g.drawLine(x, y + h - 1, x + w - 1, y + h - 1);
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}
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}
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else
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{
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g.setColor(MetalLookAndFeel.getControlDisabled());
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if (isFreeStanding)
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g.drawRect(x, y, w - 1, h - 1);
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else
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{
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g.drawLine(x, y, x + w - 1, y);
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g.drawLine(x, y, x, y + h - 1);
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g.drawLine(x + w - 1, y, x + w - 1, y + h - 1);
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}
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}
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}
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/**
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* Paints the track for a vertical scrollbar.
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*
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* @param g the graphics device.
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* @param c the component.
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* @param x the x-coordinate for the track bounds.
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* @param y the y-coordinate for the track bounds.
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* @param w the width for the track bounds.
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* @param h the height for the track bounds.
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*/
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private void paintTrackVertical(Graphics g, JComponent c,
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int x, int y, int w, int h)
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{
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if (c.isEnabled())
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{
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g.setColor(MetalLookAndFeel.getControlDarkShadow());
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g.drawLine(x, y, x, y + h - 1);
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g.drawLine(x, y, x + w - 1, y);
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g.drawLine(x, y + h - 1, x + w - 1, y + h - 1);
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g.setColor(scrollBarShadowColor);
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g.drawLine(x + 1, y + 1, x + w - 1, y + 1);
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g.drawLine(x + 1, y + 1, x + 1, y + h - 2);
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if (isFreeStanding)
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{
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g.setColor(MetalLookAndFeel.getControlDarkShadow());
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g.drawLine(x + w - 2, y, x + w - 2, y + h - 1);
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g.setColor(MetalLookAndFeel.getControlHighlight());
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g.drawLine(x + w - 1, y, x + w - 1, y + h - 1);
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}
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}
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else
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{
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g.setColor(MetalLookAndFeel.getControlDisabled());
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if (isFreeStanding)
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g.drawRect(x, y, w - 1, h - 1);
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else
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{
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g.drawLine(x, y, x + w - 1, y);
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g.drawLine(x, y, x, y + h - 1);
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g.drawLine(x, y + h - 1, x + w - 1, y + h - 1);
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}
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}
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}
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/**
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* Paints the slider button of the ScrollBar.
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*
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* @param g the Graphics context to use
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* @param c the JComponent on which we paint
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* @param thumbBounds the rectangle that is the slider button
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*/
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protected void paintThumb(Graphics g, JComponent c, Rectangle thumbBounds)
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{
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// a disabled scrollbar has no thumb in the metal look and feel
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if (!c.isEnabled())
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return;
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if (scrollbar.getOrientation() == HORIZONTAL)
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paintThumbHorizontal(g, c, thumbBounds);
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else
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paintThumbVertical(g, c, thumbBounds);
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// Draw the pattern when the theme is not Ocean.
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if (! (MetalLookAndFeel.getCurrentTheme() instanceof OceanTheme))
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{
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MetalUtils.fillMetalPattern(c, g, thumbBounds.x + 3, thumbBounds.y + 3,
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thumbBounds.width - 6,
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thumbBounds.height - 6,
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thumbHighlightColor,
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thumbLightShadowColor);
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}
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}
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/**
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* Paints the thumb for a horizontal scroll bar.
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*
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* @param g the graphics device.
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* @param c the scroll bar component.
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* @param thumbBounds the thumb bounds.
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*/
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private void paintThumbHorizontal(Graphics g, JComponent c,
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Rectangle thumbBounds)
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{
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int x = thumbBounds.x;
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int y = thumbBounds.y;
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int w = thumbBounds.width;
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int h = thumbBounds.height;
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// First we fill the background.
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MetalTheme theme = MetalLookAndFeel.getCurrentTheme();
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if (theme instanceof OceanTheme
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&& UIManager.get("ScrollBar.gradient") != null)
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{
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MetalUtils.paintGradient(g, x + 2, y + 2, w - 4, h - 2,
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SwingConstants.VERTICAL,
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"ScrollBar.gradient");
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}
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else
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{
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g.setColor(thumbColor);
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if (isFreeStanding)
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g.fillRect(x, y, w, h - 1);
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else
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g.fillRect(x, y, w, h);
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}
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// then draw the dark box
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g.setColor(thumbLightShadowColor);
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if (isFreeStanding)
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g.drawRect(x, y, w - 1, h - 2);
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else
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{
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g.drawLine(x, y, x + w - 1, y);
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g.drawLine(x, y, x, y + h - 1);
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g.drawLine(x + w - 1, y, x + w - 1, y + h - 1);
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}
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// then the highlight
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g.setColor(thumbHighlightColor);
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if (isFreeStanding)
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{
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g.drawLine(x + 1, y + 1, x + w - 3, y + 1);
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g.drawLine(x + 1, y + 1, x + 1, y + h - 3);
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}
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else
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{
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g.drawLine(x + 1, y + 1, x + w - 3, y + 1);
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g.drawLine(x + 1, y + 1, x + 1, y + h - 1);
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}
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// draw the shadow line
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g.setColor(UIManager.getColor("ScrollBar.shadow"));
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g.drawLine(x + w, y + 1, x + w, y + h - 1);
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// For the OceanTheme, draw the 3 lines in the middle.
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if (theme instanceof OceanTheme)
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{
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g.setColor(thumbLightShadowColor);
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int middle = x + w / 2;
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g.drawLine(middle - 2, y + 4, middle - 2, y + h - 5);
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g.drawLine(middle, y + 4, middle, y + h - 5);
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g.drawLine(middle + 2, y + 4, middle + 2, y + h - 5);
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g.setColor(UIManager.getColor("ScrollBar.highlight"));
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g.drawLine(middle - 1, y + 5, middle - 1, y + h - 4);
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g.drawLine(middle + 1, y + 5, middle + 1, y + h - 4);
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g.drawLine(middle + 3, y + 5, middle + 3, y + h - 4);
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}
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}
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/**
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* Paints the thumb for a vertical scroll bar.
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*
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* @param g the graphics device.
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* @param c the scroll bar component.
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* @param thumbBounds the thumb bounds.
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*/
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private void paintThumbVertical(Graphics g, JComponent c,
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Rectangle thumbBounds)
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{
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int x = thumbBounds.x;
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int y = thumbBounds.y;
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int w = thumbBounds.width;
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int h = thumbBounds.height;
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// First we fill the background.
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MetalTheme theme = MetalLookAndFeel.getCurrentTheme();
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if (theme instanceof OceanTheme
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&& UIManager.get("ScrollBar.gradient") != null)
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{
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MetalUtils.paintGradient(g, x + 2, y + 2, w - 2, h - 4,
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SwingConstants.HORIZONTAL,
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"ScrollBar.gradient");
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}
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else
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{
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g.setColor(thumbColor);
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if (isFreeStanding)
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g.fillRect(x, y, w - 1, h);
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else
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g.fillRect(x, y, w, h);
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}
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// then draw the dark box
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g.setColor(thumbLightShadowColor);
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if (isFreeStanding)
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g.drawRect(x, y, w - 2, h - 1);
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else
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{
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g.drawLine(x, y, x + w - 1, y);
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g.drawLine(x, y, x, y + h - 1);
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g.drawLine(x, y + h - 1, x + w - 1, y + h - 1);
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}
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// then the highlight
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g.setColor(thumbHighlightColor);
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if (isFreeStanding)
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{
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g.drawLine(x + 1, y + 1, x + w - 3, y + 1);
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g.drawLine(x + 1, y + 1, x + 1, y + h - 3);
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}
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else
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{
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g.drawLine(x + 1, y + 1, x + w - 1, y + 1);
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g.drawLine(x + 1, y + 1, x + 1, y + h - 3);
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}
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// draw the shadow line
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g.setColor(UIManager.getColor("ScrollBar.shadow"));
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g.drawLine(x + 1, y + h, x + w - 2, y + h);
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// For the OceanTheme, draw the 3 lines in the middle.
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if (theme instanceof OceanTheme)
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{
|
|
g.setColor(thumbLightShadowColor);
|
|
int middle = y + h / 2;
|
|
g.drawLine(x + 4, middle - 2, x + w - 5, middle - 2);
|
|
g.drawLine(x + 4, middle, x + w - 5, middle);
|
|
g.drawLine(x + 4, middle + 2, x + w - 5, middle + 2);
|
|
g.setColor(UIManager.getColor("ScrollBar.highlight"));
|
|
g.drawLine(x + 5, middle - 1, x + w - 4, middle - 1);
|
|
g.drawLine(x + 5, middle + 1, x + w - 4, middle + 1);
|
|
g.drawLine(x + 5, middle + 3, x + w - 4, middle + 3);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the minimum thumb size. For a free standing scroll bar the
|
|
* minimum size is <code>17 x 17</code> pixels, whereas for a non free
|
|
* standing scroll bar the minimum size is <code>15 x 15</code> pixels.
|
|
*
|
|
* @return The minimum thumb size.
|
|
*/
|
|
protected Dimension getMinimumThumbSize()
|
|
{
|
|
Dimension retVal;
|
|
if (scrollbar != null)
|
|
{
|
|
if (isFreeStanding)
|
|
retVal = MIN_THUMB_SIZE_FREE_STANDING;
|
|
else
|
|
retVal = MIN_THUMB_SIZE;
|
|
}
|
|
else
|
|
retVal = new Dimension(0, 0);
|
|
return retVal;
|
|
}
|
|
|
|
/**
|
|
* Returns the <code>preferredSize</code> for the specified scroll bar.
|
|
* For a vertical scrollbar the height is the sum of the preferred heights
|
|
* of the buttons plus <code>30</code>. The width is fetched from the
|
|
* <code>UIManager</code> property <code>ScrollBar.width</code>.
|
|
*
|
|
* For horizontal scrollbars the width is the sum of the preferred widths
|
|
* of the buttons plus <code>30</code>. The height is fetched from the
|
|
* <code>UIManager</code> property <code>ScrollBar.height</code>.
|
|
*
|
|
* @param c the scrollbar for which to calculate the preferred size
|
|
*
|
|
* @return the <code>preferredSize</code> for the specified scroll bar
|
|
*/
|
|
public Dimension getPreferredSize(JComponent c)
|
|
{
|
|
int height;
|
|
int width;
|
|
height = width = 0;
|
|
|
|
if (scrollbar.getOrientation() == SwingConstants.HORIZONTAL)
|
|
{
|
|
width += incrButton.getPreferredSize().getWidth();
|
|
width += decrButton.getPreferredSize().getWidth();
|
|
width += 30;
|
|
height = UIManager.getInt("ScrollBar.width");
|
|
}
|
|
else
|
|
{
|
|
height += incrButton.getPreferredSize().getHeight();
|
|
height += decrButton.getPreferredSize().getHeight();
|
|
height += 30;
|
|
width = UIManager.getInt("ScrollBar.width");
|
|
}
|
|
|
|
Insets insets = scrollbar.getInsets();
|
|
|
|
height += insets.top + insets.bottom;
|
|
width += insets.left + insets.right;
|
|
|
|
return new Dimension(width, height);
|
|
}
|
|
}
|