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jlechner |
/* 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., 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.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 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(Component)
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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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| 320 |
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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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| 341 |
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/**
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| 342 |
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* Determines the color that will be used for the inner side of
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| 343 |
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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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| 352 |
|
|
*/
|
| 353 |
|
|
public Color getShadowInnerColor(Component c)
|
| 354 |
|
|
{
|
| 355 |
|
|
if (shadowInner != null)
|
| 356 |
|
|
return shadowInner;
|
| 357 |
|
|
else
|
| 358 |
|
|
return c.getBackground().darker();
|
| 359 |
|
|
}
|
| 360 |
|
|
|
| 361 |
|
|
|
| 362 |
|
|
/**
|
| 363 |
|
|
* Determines the color that will be used for the outer side of
|
| 364 |
|
|
* shadowed edges when painting the border. If a shadow color
|
| 365 |
|
|
* has been specified upon constructing the border, that color is
|
| 366 |
|
|
* returned. Otherwise, the inner shadow color is darkened.
|
| 367 |
|
|
*
|
| 368 |
|
|
* @param c the component enclosed by this border.
|
| 369 |
|
|
*
|
| 370 |
|
|
* @see #getShadowInnerColor(java.awt.Component)
|
| 371 |
|
|
* @see java.awt.Color#darker()
|
| 372 |
|
|
*/
|
| 373 |
|
|
public Color getShadowOuterColor(Component c)
|
| 374 |
|
|
{
|
| 375 |
|
|
if (shadowOuter != null)
|
| 376 |
|
|
return shadowOuter;
|
| 377 |
|
|
else
|
| 378 |
|
|
return getShadowInnerColor(c).darker();
|
| 379 |
|
|
}
|
| 380 |
|
|
|
| 381 |
|
|
|
| 382 |
|
|
/**
|
| 383 |
|
|
* Returns the color that will be used for the outer side of
|
| 384 |
|
|
* highlighted edges when painting the border, or <code>null</code>
|
| 385 |
|
|
* if that color will be derived from the background of the enclosed
|
| 386 |
|
|
* Component.
|
| 387 |
|
|
*/
|
| 388 |
|
|
public Color getHighlightOuterColor()
|
| 389 |
|
|
{
|
| 390 |
|
|
return highlightOuter;
|
| 391 |
|
|
}
|
| 392 |
|
|
|
| 393 |
|
|
|
| 394 |
|
|
/**
|
| 395 |
|
|
* Returns the color that will be used for the inner side of
|
| 396 |
|
|
* highlighted edges when painting the border, or <code>null</code>
|
| 397 |
|
|
* if that color will be derived from the background of the enclosed
|
| 398 |
|
|
* Component.
|
| 399 |
|
|
*/
|
| 400 |
|
|
public Color getHighlightInnerColor()
|
| 401 |
|
|
{
|
| 402 |
|
|
return highlightInner;
|
| 403 |
|
|
}
|
| 404 |
|
|
|
| 405 |
|
|
|
| 406 |
|
|
/**
|
| 407 |
|
|
* Returns the color that will be used for the inner side of
|
| 408 |
|
|
* shadowed edges when painting the border, or <code>null</code> if
|
| 409 |
|
|
* that color will be derived from the background of the enclosed
|
| 410 |
|
|
* Component.
|
| 411 |
|
|
*/
|
| 412 |
|
|
public Color getShadowInnerColor()
|
| 413 |
|
|
{
|
| 414 |
|
|
return shadowInner;
|
| 415 |
|
|
}
|
| 416 |
|
|
|
| 417 |
|
|
|
| 418 |
|
|
/**
|
| 419 |
|
|
* Returns the color that will be used for the outer side of
|
| 420 |
|
|
* shadowed edges when painting the border, or <code>null</code> if
|
| 421 |
|
|
* that color will be derived from the background of the enclosed
|
| 422 |
|
|
* Component.
|
| 423 |
|
|
*/
|
| 424 |
|
|
public Color getShadowOuterColor()
|
| 425 |
|
|
{
|
| 426 |
|
|
return shadowOuter;
|
| 427 |
|
|
}
|
| 428 |
|
|
|
| 429 |
|
|
|
| 430 |
|
|
/**
|
| 431 |
|
|
* Returns the appearance of this border, which is either {@link
|
| 432 |
|
|
* #RAISED} or {@link #LOWERED}.
|
| 433 |
|
|
*/
|
| 434 |
|
|
public int getBevelType()
|
| 435 |
|
|
{
|
| 436 |
|
|
return bevelType;
|
| 437 |
|
|
}
|
| 438 |
|
|
|
| 439 |
|
|
|
| 440 |
|
|
/**
|
| 441 |
|
|
* Determines whether this border fills every pixel in its area
|
| 442 |
|
|
* when painting.
|
| 443 |
|
|
*
|
| 444 |
|
|
* <p>If the border colors are derived from the background color of
|
| 445 |
|
|
* the enclosed component, the result is <code>true</code> because
|
| 446 |
|
|
* the derivation method always returns opaque colors. Otherwise,
|
| 447 |
|
|
* the result depends on the opacity of the individual colors.
|
| 448 |
|
|
*
|
| 449 |
|
|
* @return <code>true</code> if the border is fully opaque, or
|
| 450 |
|
|
* <code>false</code> if some pixels of the background
|
| 451 |
|
|
* can shine through the border.
|
| 452 |
|
|
*/
|
| 453 |
|
|
public boolean isBorderOpaque()
|
| 454 |
|
|
{
|
| 455 |
|
|
/* If the colors are to be drived from the enclosed Component's
|
| 456 |
|
|
* background color, the border is guaranteed to be fully opaque
|
| 457 |
|
|
* because Color.brighten() and Color.darken() always return an
|
| 458 |
|
|
* opaque color.
|
| 459 |
|
|
*/
|
| 460 |
|
|
return
|
| 461 |
|
|
((highlightOuter == null) || (highlightOuter.getAlpha() == 255))
|
| 462 |
|
|
&& ((highlightInner == null) || (highlightInner.getAlpha() == 255))
|
| 463 |
|
|
&& ((shadowInner == null) || (shadowInner.getAlpha() == 255))
|
| 464 |
|
|
&& ((shadowOuter == null) ||(shadowOuter.getAlpha() == 255));
|
| 465 |
|
|
}
|
| 466 |
|
|
|
| 467 |
|
|
|
| 468 |
|
|
/**
|
| 469 |
|
|
* Paints a raised bevel border around a component.
|
| 470 |
|
|
*
|
| 471 |
|
|
* @param c the component whose border is to be painted.
|
| 472 |
|
|
* @param g the graphics for painting.
|
| 473 |
|
|
* @param x the horizontal position for painting the border.
|
| 474 |
|
|
* @param y the vertical position for painting the border.
|
| 475 |
|
|
* @param width the width of the available area for painting the border.
|
| 476 |
|
|
* @param height the height of the available area for painting the border.
|
| 477 |
|
|
*/
|
| 478 |
|
|
protected void paintRaisedBevel(Component c, Graphics g,
|
| 479 |
|
|
int x, int y, int width, int height)
|
| 480 |
|
|
{
|
| 481 |
|
|
paintBevel(g, x, y, width, height,
|
| 482 |
|
|
getHighlightOuterColor(c), getHighlightInnerColor(c),
|
| 483 |
|
|
getShadowInnerColor(c), getShadowOuterColor(c));
|
| 484 |
|
|
}
|
| 485 |
|
|
|
| 486 |
|
|
|
| 487 |
|
|
/**
|
| 488 |
|
|
* Paints a lowered bevel border around a component.
|
| 489 |
|
|
*
|
| 490 |
|
|
* @param c the component whose border is to be painted.
|
| 491 |
|
|
* @param g the graphics for painting.
|
| 492 |
|
|
* @param x the horizontal position for painting the border.
|
| 493 |
|
|
* @param y the vertical position for painting the border.
|
| 494 |
|
|
* @param width the width of the available area for painting the border.
|
| 495 |
|
|
* @param height the height of the available area for painting the border.
|
| 496 |
|
|
*/
|
| 497 |
|
|
protected void paintLoweredBevel(Component c, Graphics g,
|
| 498 |
|
|
int x, int y, int width, int height)
|
| 499 |
|
|
{
|
| 500 |
|
|
paintBevel(g, x, y, width, height,
|
| 501 |
|
|
getShadowInnerColor(c), getShadowOuterColor(c),
|
| 502 |
|
|
getHighlightInnerColor(c), getHighlightOuterColor(c));
|
| 503 |
|
|
}
|
| 504 |
|
|
|
| 505 |
|
|
|
| 506 |
|
|
/**
|
| 507 |
|
|
* Paints a two-pixel bevel in four colors.
|
| 508 |
|
|
*
|
| 509 |
|
|
* <pre>
|
| 510 |
|
|
* ++++++++++++
|
| 511 |
|
|
* +..........# + = color a
|
| 512 |
|
|
* +. X# . = color b
|
| 513 |
|
|
* +. X# X = color c
|
| 514 |
|
|
* +.XXXXXXXXX# # = color d
|
| 515 |
|
|
* ############</pre>
|
| 516 |
|
|
*
|
| 517 |
|
|
* @param g the graphics for painting.
|
| 518 |
|
|
* @param x the horizontal position for painting the border.
|
| 519 |
|
|
* @param y the vertical position for painting the border.
|
| 520 |
|
|
* @param width the width of the available area for painting the border.
|
| 521 |
|
|
* @param height the height of the available area for painting the border.
|
| 522 |
|
|
* @param a the color for the outer side of the top and left edges.
|
| 523 |
|
|
* @param b the color for the inner side of the top and left edges.
|
| 524 |
|
|
* @param c the color for the inner side of the bottom and right edges.
|
| 525 |
|
|
* @param d the color for the outer side of the bottom and right edges.
|
| 526 |
|
|
*/
|
| 527 |
|
|
private static void paintBevel(Graphics g,
|
| 528 |
|
|
int x, int y, int width, int height,
|
| 529 |
|
|
Color a, Color b, Color c, Color d)
|
| 530 |
|
|
{
|
| 531 |
|
|
Color oldColor;
|
| 532 |
|
|
|
| 533 |
|
|
oldColor = g.getColor();
|
| 534 |
|
|
g.translate(x, y);
|
| 535 |
|
|
width = width - 1;
|
| 536 |
|
|
height = height - 1;
|
| 537 |
|
|
|
| 538 |
|
|
try
|
| 539 |
|
|
{
|
| 540 |
|
|
/* To understand this code, it might be helpful to look at the
|
| 541 |
|
|
* images that are included with the JavaDoc. They are located
|
| 542 |
|
|
* in the "doc-files" subdirectory.
|
| 543 |
|
|
*/
|
| 544 |
|
|
g.setColor(a);
|
| 545 |
|
|
g.drawLine(0, 0, width, 0); // a, horizontal
|
| 546 |
|
|
g.drawLine(0, 1, 0, height); // a, vertical
|
| 547 |
|
|
|
| 548 |
|
|
g.setColor(b);
|
| 549 |
|
|
g.drawLine(1, 1, width - 1, 1); // b, horizontal
|
| 550 |
|
|
g.drawLine(1, 2, 1, height - 1); // b, vertical
|
| 551 |
|
|
|
| 552 |
|
|
g.setColor(c);
|
| 553 |
|
|
g.drawLine(2, height - 1, width - 1, height - 1); // c, horizontal
|
| 554 |
|
|
g.drawLine(width - 1, 2, width - 1, height - 2); // c, vertical
|
| 555 |
|
|
|
| 556 |
|
|
g.setColor(d);
|
| 557 |
|
|
g.drawLine(1, height, width, height); // d, horizontal
|
| 558 |
|
|
g.drawLine(width, 1, width, height - 1); // d, vertical
|
| 559 |
|
|
}
|
| 560 |
|
|
finally
|
| 561 |
|
|
{
|
| 562 |
|
|
g.translate(-x, -y);
|
| 563 |
|
|
g.setColor(oldColor);
|
| 564 |
|
|
}
|
| 565 |
|
|
}
|
| 566 |
|
|
}
|
| 567 |
|
|
|
