mirror of git://gcc.gnu.org/git/gcc.git
328 lines
12 KiB
Java
328 lines
12 KiB
Java
/* SoftBevelBorder.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, three pixel thick border that looks like a BevelBorder
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* with slightly softened corners.
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*
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* <p>Like BevelBorder, SoftBevelBorder has a highlight and a shadow
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* color. In the raised variant, the highlight color is used for the
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* top and left edges, and the shadow color is used for the bottom and
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* right edge. In the lowered variant, color usage is reversed. For
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* an 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 SoftBevelBorder extends BevelBorder
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{
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/**
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* Determined using the <code>serialver</code> tool
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* of Sun JDK 1.4.1_01 on GNU/Linux 2.4.20. Interestingly,
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* the Apple/Sun JDK 1.3.1 on MacOS X 10.1.5 gives a different
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* value, namely -6658357140774549493L.
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*/
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static final long serialVersionUID = 5248789787305979975L;
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/**
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* Constructs a SoftBevelBorder 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 SoftBevelBorder
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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/SoftBevelBorder-1.png" width="500" height="200"
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* alt="[An illustration showing raised and lowered SoftBevelBorders]" />
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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 BevelBorder#RAISED}
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* or {@link BevelBorder#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 SoftBevelBorder(int bevelType)
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{
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super(bevelType);
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}
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/**
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* Constructs a SoftBevelBorder given its appearance type and two
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* colors for its highlight and shadow.
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*
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* <p><img src="doc-files/SoftBevelBorder-2.png" width="500" height="150"
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* alt="[An illustration showing SoftBevelBorders that were
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* constructed 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 BevelBorder#RAISED} or {@link
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* BevelBorder#LOWERED}.
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*
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* @param highlight the color that will be used for the inner side
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* of the highlighted edges (top and left if if
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* <code>bevelType</code> is {@link BevelBorder#RAISED};
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* bottom 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 side of
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* the shadowed edges (bottom and right if
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* <code>bevelType</code> is {@link BevelBorder#RAISED}; top
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* and left otherwise). The color for the inner side is a
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* brightened version of this color.
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*
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* @throws IllegalArgumentException if <code>bevelType</code> has an
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* 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 SoftBevelBorder(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 SoftBevelBorder given its appearance type and all
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* colors.
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*
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* <p><img src="doc-files/SoftBevelBorder-3.png" width="500" height="150"
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* alt="[An illustration showing SoftBevelBorders that were
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* constructed 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 BevelBorder#RAISED} or {@link
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* BevelBorder#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 BevelBorder#RAISED};
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* bottom and 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 side
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* of the shadowed edges (bottom and right if
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* <code>bevelType</code> is {@link BevelBorder#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 SoftBevelBorder(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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super(bevelType,
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highlightOuter, highlightInner,
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shadowOuter, 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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paintSoftBevel(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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break;
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case LOWERED:
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paintSoftBevel(g, x, y, width, height,
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getShadowOuterColor(c), getShadowInnerColor(c),
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getHighlightInnerColor(c), getHighlightOuterColor(c));
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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(3, 3, 3, 3);
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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 = 3;
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return insets;
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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>The enlarged view (see documentation for constructors) shows
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* that a SoftBevelBorder does not paint all pixels. Therefore,
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* this method always returns <code>false</code>.
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*
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* @return <code>false</code>.
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*/
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public boolean isBorderOpaque()
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{
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return false;
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}
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/**
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* Paints a soft 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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* +.. # . = color b
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* +. # X = color c
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* .. X# # = 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 paintSoftBevel(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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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, especially
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* SoftBevelBorder-3.png. They are located in the "doc-files"
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* subdirectory.
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*/
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g.setColor(a);
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g.drawLine(0, 0, width - 1, 0); // a, horizontal
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g.drawLine(0, 1, 2, 1); // a, horizontal
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g.drawLine(0, 2, 0, height - 1); // a, vertical
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g.setColor(b);
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g.drawLine(width, 0, width, 0); // b, horizontal
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g.drawLine(2, 1, width - 1, 1); // b, horizontal
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g.drawLine(1, 2, 2, 2); // b, horizontal
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g.drawLine(1, 3, 1, height - 1); // b, vertical
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g.drawLine(0, height - 1, 0, height); // b, vertical
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g.setColor(c);
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g.drawLine(width - 1, height - 1, // c, one pixel
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width - 1, height - 1);
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g.setColor(d);
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g.drawLine(2, height, width, height); // d, horizontal
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g.drawLine(width, 2, 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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