1ce4e666b2
2003-08-01 Sascha Brawer <brawer@dandelis.ch> * javax/swing/border/BevelBorder.java, javax/swing/border/EtchedBorder.java, javax/swing/border/LineBorder.java, javax/swing/border/MatteBorder.java, javax/swing/border/SoftBevelBorder.java, javax/swing/plaf/BorderUIResource.java, javax/swing/plaf/ComponentUI.java, javax/swing/plaf/TreeUI.java, javax/swing/plaf/basic/BasicBorders.java, javax/swing/plaf/basic/BasicGraphicsUtils.java, javax/swing/plaf/basic/BasicTreeUI.java: Prepend "doc-files" to all paths to embedded Javadoc images, so that the generated documentation contains the correct URL. From-SVN: r70063
569 lines
18 KiB
Java
569 lines
18 KiB
Java
/* BevelBorder.java --
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Copyright (C) 2003 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., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 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.border;
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import java.awt.Color;
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import java.awt.Component;
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import java.awt.Graphics;
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import java.awt.Insets;
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/**
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* A rectangular, two pixel thick border that causes the enclosed area
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* to appear as if it was raising out of or lowered into the screen. Some
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* LookAndFeels use this kind of border for rectangular buttons.
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*
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* <p>A BevelBorder has a highlight and a shadow color. In the raised
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* variant, the highlight color is used for the top and left edges,
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* and the shadow color is used for the bottom and right edge. For an
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* image, see the documentation of the individual constructors.
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*
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* @author Sascha Brawer (brawer@dandelis.ch)
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*/
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public class BevelBorder
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extends AbstractBorder
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{
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/**
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* Determined using the <code>serialver</code> tool
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* of Apple/Sun JDK 1.3.1 on MacOS X 10.1.5.
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*/
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static final long serialVersionUID = -1034942243356299676L;
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/**
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* Indicates that the BevelBorder looks like if the enclosed area was
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* raising out of the screen.
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*/
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public static final int RAISED = 0;
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/**
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* Indicates that the BevelBorder looks like if the enclosed area was
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* pressed into the screen.
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*/
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public static final int LOWERED = 1;
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/**
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* The type of this BevelBorder, which is either {@link #RAISED}
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* or {@link #LOWERED}.
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*/
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protected int bevelType;
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/**
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* The outer highlight color, or <code>null</code> to indicate that
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* the color shall be derived from the background of the component
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* whose border is being painted.
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*/
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protected Color highlightOuter;
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/**
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* The inner highlight color, or <code>null</code> to indicate that
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* the color shall be derived from the background of the component
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* whose border is being painted.
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*/
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protected Color highlightInner;
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/**
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* The outer shadow color, or <code>null</code> to indicate that the
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* color shall be derived from the background of the component whose
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* border is being painted.
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*/
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protected Color shadowOuter;
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/**
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* The inner shadow color, or <code>null</code> to indicate that the
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* color shall be derived from the background of the component whose
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* border is being painted.
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*/
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protected Color shadowInner;
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/**
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* Constructs a BevelBorder whose colors will be derived from the
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* background of the enclosed component. The background color is
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* retrieved each time the border is painted, so a BevelBorder
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* constructed by this method will automatically reflect a change
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* to the component’s background color.
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*
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* <p><img src="doc-files/BevelBorder-1.png" width="500" height="150"
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* alt="[An illustration showing raised and lowered BevelBorders]" />
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*
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* @param bevelType the desired appearance of the border. The value
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* must be either {@link #RAISED} or {@link #LOWERED}.
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*
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* @throws IllegalArgumentException if <code>bevelType</code> has
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* an unsupported value.
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*/
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public BevelBorder(int bevelType)
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{
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if ((bevelType != RAISED) && (bevelType != LOWERED))
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throw new IllegalArgumentException();
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this.bevelType = bevelType;
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}
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/**
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* Constructs a BevelBorder given its appearance type and two colors
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* for its highlight and shadow.
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*
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* <p><img src="doc-files/BevelBorder-2.png" width="500" height="150"
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* alt="[An illustration showing BevelBorders that were constructed
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* with this method]" />
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*
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* @param bevelType the desired appearance of the border. The value
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* must be either {@link #RAISED} or {@link #LOWERED}.
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*
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* @param highlight the color that will be used for the inner
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* side of the highlighted edges (top and left if
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* if <code>bevelType</code> is {@link #RAISED}; bottom
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* and right otherwise). The color for the outer side
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* is a brightened version of this color.
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*
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* @param shadow the color that will be used for the outer
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* side of the shadowed edges (bottom and right
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* if <code>bevelType</code> is {@link #RAISED}; top
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* and left otherwise). The color for the inner side
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* is a brightened version of this color.
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*
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* @throws IllegalArgumentException if <code>bevelType</code> has
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* an unsupported value.
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*
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* @throws NullPointerException if <code>highlight</code> or
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* <code>shadow</code> is <code>null</code>.
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*
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* @see java.awt.Color.brighter()
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*/
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public BevelBorder(int bevelType, Color highlight, Color shadow)
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{
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this(bevelType,
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/* highlightOuter */ highlight.brighter(),
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/* highlightInner */ highlight,
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/* shadowOuter */ shadow,
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/* shadowInner */ shadow.brighter());
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}
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/**
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* Constructs a BevelBorder given its appearance type and all
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* colors.
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*
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* <p><img src="doc-files/BevelBorder-3.png" width="500" height="150"
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* alt="[An illustration showing BevelBorders that were constructed
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* with this method]" />
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*
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* @param bevelType the desired appearance of the border. The value
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* must be either {@link #RAISED} or {@link #LOWERED}.
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*
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* @param highlightOuter the color that will be used for the outer
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* side of the highlighted edges (top and left if
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* <code>bevelType</code> is {@link #RAISED}; bottom and
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* right otherwise).
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*
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* @param highlightInner the color that will be used for the inner
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* side of the highlighted edges.
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*
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* @param shadowOuter the color that will be used for the outer
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* side of the shadowed edges (bottom and right
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* if <code>bevelType</code> is {@link #RAISED}; top
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* and left otherwise).
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*
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* @param shadowInner the color that will be used for the inner
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* side of the shadowed edges.
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*
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* @throws IllegalArgumentException if <code>bevelType</code> has
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* an unsupported value.
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*
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* @throws NullPointerException if one of the passed colors
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* is <code>null</code>.
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*/
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public BevelBorder(int bevelType,
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Color highlightOuter, Color highlightInner,
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Color shadowOuter, Color shadowInner)
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{
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this(bevelType); // checks the validity of bevelType
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if ((highlightOuter == null) || (highlightInner == null)
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|| (shadowOuter == null) || (shadowInner == null))
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throw new NullPointerException();
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this.highlightOuter = highlightOuter;
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this.highlightInner = highlightInner;
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this.shadowOuter = shadowOuter;
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this.shadowInner = shadowInner;
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}
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/**
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* Paints the border for a given component.
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*
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* @param c the component whose border is to be painted.
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* @param g the graphics for painting.
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* @param x the horizontal position for painting the border.
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* @param y the vertical position for painting the border.
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* @param width the width of the available area for painting the border.
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* @param height the height of the available area for painting the border.
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*/
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public void paintBorder(Component c, Graphics g,
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int x, int y, int width, int height)
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{
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switch (bevelType)
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{
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case RAISED:
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paintRaisedBevel(c, g, x, y, width, height);
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break;
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case LOWERED:
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paintLoweredBevel(c, g, x, y, width, height);
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break;
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}
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}
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/**
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* Measures the width of this border.
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*
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* @param c the component whose border is to be measured.
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*
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* @return an Insets object whose <code>left</code>, <code>right</code>,
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* <code>top</code> and <code>bottom</code> fields indicate the
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* width of the border at the respective edge.
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*
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* @see #getBorderInsets(java.awt.Component, java.awt.Insets)
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*/
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public Insets getBorderInsets(Component c)
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{
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return new Insets(2, 2, 2, 2);
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}
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/**
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* Measures the width of this border, storing the results into a
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* pre-existing Insets object.
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*
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* @param insets an Insets object for holding the result values.
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* After invoking this method, the <code>left</code>,
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* <code>right</code>, <code>top</code> and
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* <code>bottom</code> fields indicate the width of the
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* border at the respective edge.
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*
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* @return the same object that was passed for <code>insets</code>.
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*
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* @see #getBorderInsets()
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*/
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public Insets getBorderInsets(Component c, Insets insets)
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{
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insets.left = insets.right = insets.top = insets.bottom = 2;
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return insets;
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}
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/**
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* Determines the color that will be used for the outer side of
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* highlighted edges when painting the border. If a highlight color
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* has been specified upon constructing the border, that color is
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* returned. Otherwise, the inner highlight color is brightened.
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*
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* @param c the component enclosed by this border.
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*
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* @see #getHighlightInnerColor(java.awt.Component)
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* @see java.awt.Color#brighter()
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*/
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public Color getHighlightOuterColor(Component c)
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{
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if (highlightOuter != null)
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return highlightOuter;
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else
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return getHighlightInnerColor(c).brighter();
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}
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/**
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* Determines the color that will be used for the inner side of
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* highlighted edges when painting the border. If a highlight color
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* has been specified upon constructing the border, that color is
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* returned. Otherwise, the background color of the enclosed
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* component is brightened.
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*
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* @param c the component enclosed by this border.
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*
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* @see java.awt.Component#getBackground()
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* @see java.awt.Color#brighter()
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*/
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public Color getHighlightInnerColor(Component c)
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{
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if (highlightInner != null)
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return highlightInner;
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else
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return c.getBackground().brighter();
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}
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/**
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* Determines the color that will be used for the inner side of
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* shadowed edges when painting the border. If a shadow color has
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* been specified upon constructing the border, that color is
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* returned. Otherwise, the background color of the enclosed
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* component is darkened.
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*
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* @param c the component enclosed by this border.
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*
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* @see java.awt.Component#getBackground()
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* @see java.awt.Color#darker()
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*/
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public Color getShadowInnerColor(Component c)
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{
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if (shadowInner != null)
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return shadowInner;
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else
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return c.getBackground().darker();
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}
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/**
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* Determines the color that will be used for the outer side of
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* shadowed edges when painting the border. If a shadow color
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* has been specified upon constructing the border, that color is
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* returned. Otherwise, the inner shadow color is darkened.
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*
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* @param c the component enclosed by this border.
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*
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* @see #getShadowInnerColor(java.awt.Component)
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* @see java.awt.Color#darker()
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*/
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public Color getShadowOuterColor(Component c)
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{
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if (shadowOuter != null)
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return shadowOuter;
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else
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return getShadowInnerColor(c).darker();
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}
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/**
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* Returns the color that will be used for the outer side of
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* highlighted edges when painting the border, or <code>null</code>
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* if that color will be derived from the background of the enclosed
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* Component.
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*/
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public Color getHighlightOuterColor()
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{
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return highlightOuter;
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}
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/**
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* Returns the color that will be used for the inner side of
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* highlighted edges when painting the border, or <code>null</code>
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* if that color will be derived from the background of the enclosed
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* Component.
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*/
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public Color getHighlightInnerColor()
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{
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return highlightInner;
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}
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/**
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* Returns the color that will be used for the inner side of
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* shadowed edges when painting the border, or <code>null</code> if
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* that color will be derived from the background of the enclosed
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* Component.
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*/
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public Color getShadowInnerColor()
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{
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return shadowInner;
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}
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/**
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* Returns the color that will be used for the outer side of
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* shadowed edges when painting the border, or <code>null</code> if
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* that color will be derived from the background of the enclosed
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* Component.
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*/
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public Color getShadowOuterColor()
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{
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return shadowOuter;
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}
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/**
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* Returns the appearance of this border, which is either {@link
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* #RAISED} or {@link #LOWERED}.
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*/
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public int getBevelType()
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{
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return bevelType;
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}
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/**
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* Determines whether this border fills every pixel in its area
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* when painting.
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*
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* <p>If the border colors are derived from the background color of
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* the enclosed component, the result is <code>true</code> because
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* the derivation method always returns opaque colors. Otherwise,
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* the result depends on the opacity of the individual colors.
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*
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* @return <code>true</code> if the border is fully opaque, or
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* <code>false</code> if some pixels of the background
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* can shine through the border.
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*/
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public boolean isBorderOpaque()
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{
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/* If the colors are to be drived from the enclosed Component's
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* background color, the border is guaranteed to be fully opaque
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* because Color.brighten() and Color.darken() always return an
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* opaque color.
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*/
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return
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((highlightOuter == null) || (highlightOuter.getAlpha() == 255))
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&& ((highlightInner == null) || (highlightInner.getAlpha() == 255))
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&& ((shadowInner == null) || (shadowInner.getAlpha() == 255))
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&& ((shadowOuter == null) ||(shadowOuter.getAlpha() == 255));
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}
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/**
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* Paints a raised bevel border around a component.
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*
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* @param c the component whose border is to be painted.
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* @param g the graphics for painting.
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* @param x the horizontal position for painting the border.
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* @param y the vertical position for painting the border.
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* @param width the width of the available area for painting the border.
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* @param height the height of the available area for painting the border.
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*/
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protected void paintRaisedBevel(Component c, Graphics g,
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int x, int y, int width, int height)
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{
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paintBevel(g, x, y, width, height,
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getHighlightOuterColor(c), getHighlightInnerColor(c),
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getShadowInnerColor(c), getShadowOuterColor(c));
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}
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/**
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* Paints a lowered bevel border around a component.
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*
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* @param c the component whose border is to be painted.
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* @param g the graphics for painting.
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* @param x the horizontal position for painting the border.
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* @param y the vertical position for painting the border.
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* @param width the width of the available area for painting the border.
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* @param height the height of the available area for painting the border.
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*/
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protected void paintLoweredBevel(Component c, Graphics g,
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int x, int y, int width, int height)
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{
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paintBevel(g, x, y, width, height,
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getShadowInnerColor(c), getShadowOuterColor(c),
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getHighlightInnerColor(c), getHighlightOuterColor(c));
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}
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/**
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* Paints a two-pixel bevel in four colors.
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*
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* <pre>
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* @@@@@@@@@@@@
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* @..........# @ = color a
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* @. X# . = color b
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* @. X# X = color c
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* @.XXXXXXXXX# # = color d
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* ############</pre>
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*
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* @param g the graphics for painting.
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* @param x the horizontal position for painting the border.
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* @param y the vertical position for painting the border.
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* @param width the width of the available area for painting the border.
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* @param height the height of the available area for painting the border.
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* @param a the color for the outer side of the top and left edges.
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* @param b the color for the inner side of the top and left edges.
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* @param c the color for the inner side of the bottom and right edges.
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* @param d the color for the outer side of the bottom and right edges.
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*/
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private static void paintBevel(Graphics g,
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int x, int y, int width, int height,
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Color a, Color b, Color c, Color d)
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{
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Color oldColor;
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oldColor = g.getColor();
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g.translate(x, y);
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width = width - 1;
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height = height - 1;
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|
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try
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{
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/* To understand this code, it might be helpful to look at the
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* images that are included with the JavaDoc. They are located
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* in the "doc-files" subdirectory.
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|
*/
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g.setColor(a);
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g.drawLine(0, 0, width, 0); // a, horizontal
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g.drawLine(0, 1, 0, height); // a, vertical
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|
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g.setColor(b);
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g.drawLine(1, 1, width - 1, 1); // b, horizontal
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g.drawLine(1, 2, 1, height - 1); // b, vertical
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|
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g.setColor(c);
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g.drawLine(2, height - 1, width - 1, height - 1); // c, horizontal
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g.drawLine(width - 1, 2, width - 1, height - 2); // c, vertical
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|
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g.setColor(d);
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g.drawLine(1, height, width, height); // d, horizontal
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g.drawLine(width, 1, width, height - 1); // d, vertical
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}
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finally
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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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|
}
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|
|