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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/javax/swing/border/MatteBorder.java | |
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Diffstat (limited to 'libjava/classpath/javax/swing/border/MatteBorder.java')
-rw-r--r-- | libjava/classpath/javax/swing/border/MatteBorder.java | 407 |
1 files changed, 407 insertions, 0 deletions
diff --git a/libjava/classpath/javax/swing/border/MatteBorder.java b/libjava/classpath/javax/swing/border/MatteBorder.java new file mode 100644 index 000000000..c0c2d7760 --- /dev/null +++ b/libjava/classpath/javax/swing/border/MatteBorder.java @@ -0,0 +1,407 @@ +/* MatteBorder.java -- + Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package javax.swing.border; + +import java.awt.Color; +import java.awt.Component; +import java.awt.Graphics; +import java.awt.Insets; + +import javax.swing.Icon; + +/** + * A border that is filled with either a solid color or with repeated + * icon tiles. + * + * <p><img src="doc-files/MatteBorder-1.png" width="500" height="150" + * alt="[Two MatteBorders]" /> + * + * @author Sascha Brawer (brawer@dandelis.ch) + */ +public class MatteBorder extends EmptyBorder +{ + /** + * Determined using the <code>serialver</code> tool + * of Apple/Sun JDK 1.3.1 on MacOS X 10.1.5. + */ + static final long serialVersionUID = 4422248989617298224L; + + + /** + * The color that is used for filling the border, or + * <code>null</code> if the border is filled with repetitions of a + * tile icon. + * + * @see #tileIcon + */ + protected Color color; + + + /** + * The icon is used for filling the border with a tile, or + * <code>null</code> if the border is filled with a solid + * color. + * + * @see #color + */ + protected Icon tileIcon; + + + /** + * Constructs a MatteBorder given the width on each side + * and a fill color. + * + * <p><img src="doc-files/MatteBorder-2.png" width="500" height="150" + * alt="[A picture of a MatteBorder made by this constructor]" /> + * + * @param top the width of the border at its top edge. + * @param left the width of the border at its left edge. + * @param bottom the width of the border at its bottom edge. + * @param right the width of the border at its right edge. + * @param matteColor the color for filling the border. + */ + public MatteBorder(int top, int left, int bottom, int right, + Color matteColor) + { + super(top, left, bottom, right); + + if (matteColor == null) + throw new IllegalArgumentException(); + + this.color = matteColor; + } + + + /** + * Constructs a MatteBorder given its insets and fill color. + * + * <p><img src="doc-files/MatteBorder-3.png" width="500" height="150" + * alt="[A picture of a MatteBorder made by this constructor]" /> + * + * @param borderInsets an Insets object whose <code>top</code>, + * <code>left</code>, <code>bottom</code> and <code>right</code> + * fields indicate the with of the border at the respective + * edge. + * + * @param matteColor the color for filling the border. + */ + public MatteBorder(Insets borderInsets, Color matteColor) + { + this(borderInsets.top, borderInsets.left, + borderInsets.bottom, borderInsets.right, + matteColor); + } + + + /** + * Constructs a MatteBorder given the width on each side + * and an icon for tiling the border area. + * + * <p><img src="doc-files/MatteBorder-4.png" width="500" height="150" + * alt="[A picture of a MatteBorder made by this constructor]" /> + * + * @param top the width of the border at its top edge. + * @param left the width of the border at its left edge. + * @param bottom the width of the border at its bottom edge. + * @param right the width of the border at its right edge. + * @param tileIcon an icon for tiling the border area. + */ + public MatteBorder(int top, int left, int bottom, int right, + Icon tileIcon) + { + super(top, left, bottom, right); + + this.tileIcon = tileIcon; + } + + + /** + * Constructs a MatteBorder given its insets and an icon + * for tiling the border area. + * + * <p><img src="doc-files/MatteBorder-5.png" width="500" height="150" + * alt="[A picture of a MatteBorder made by this constructor]" /> + * + * @param borderInsets an Insets object whose <code>top</code>, + * <code>left</code>, <code>bottom</code> and <code>right</code> + * fields indicate the with of the border at the respective + * edge. + * + * @param tileIcon an icon for tiling the border area. + */ + public MatteBorder(Insets borderInsets, Icon tileIcon) + { + this(borderInsets.top, borderInsets.left, + borderInsets.bottom, borderInsets.right, + tileIcon); + } + + + /** + * Constructs a MatteBorder given an icon for tiling the + * border area. The icon width is used for the border insets + * at the left and right edge, the icon height for the top and + * bottom edge. + * + * <p><img src="doc-files/MatteBorder-6.png" width="379" height="150" + * alt="[A picture of a MatteBorder made by this constructor]" /> + * + * @param tileIcon an icon for tiling the border area. + */ + public MatteBorder(Icon tileIcon) + { + this(-1, -1, -1, -1, tileIcon); + } + + + /** + * Paints the border for a given component. + * + * @param c the component whose border is to be painted. + * @param g the graphics for painting. + * @param x the horizontal position for painting the border. + * @param y the vertical position for painting the border. + * @param width the width of the available area for painting the border. + * @param height the height of the available area for painting the border. + */ + public void paintBorder(Component c, Graphics g, + int x, int y, int width, int height) + { + Insets i = getBorderInsets(); + paintEdge(c, g, x, y, width, i.top, 0, 0); // top edge + paintEdge(c, g, x, y + height - i.bottom, // bottom edge + width, i.bottom, + 0, height - i.bottom); + paintEdge(c, g, x, y + i.top, // left edge + i.left, height - i.top, + 0, i.top); + paintEdge(c, g, x + width - i.right, y + i.top, // right edge + i.right, height - i.bottom, + width - i.right, i.top); + } + + + /** + * Measures the width of this border. + * + * @param c the component whose border is to be measured. + * + * @return an Insets object whose <code>left</code>, <code>right</code>, + * <code>top</code> and <code>bottom</code> fields indicate the + * width of the border at the respective edge. + * + * @see #getBorderInsets(java.awt.Component, java.awt.Insets) + */ + public Insets getBorderInsets(Component c) + { + /* There is no obvious reason for overriding this method, but we + * try to have exactly the same API as the Sun reference + * implementation. + */ + return this.getBorderInsets(c, null); + } + + + /** + * Measures the width of this border, storing the results into a + * pre-existing Insets object. + * + * @param insets an Insets object for holding the result values. + * After invoking this method, the <code>left</code>, + * <code>right</code>, <code>top</code> and + * <code>bottom</code> fields indicate the width of the + * border at the respective edge. + * + * @return the same object that was passed for <code>insets</code>. + * + * @see #getBorderInsets() + */ + public Insets getBorderInsets(Component c, Insets insets) + { + if (insets == null) + insets = new Insets(0, 0, 0, 0); + + if ((tileIcon != null) + && (top < 0) && (left < 0) + && (right < 0) && (bottom < 0)) + { + insets.left = insets.right = tileIcon.getIconWidth(); + insets.top = insets.bottom = tileIcon.getIconHeight(); + return insets; + } + + /* Copy top, left, bottom and right into the respective + * field of insets. + */ + return super.getBorderInsets(c, insets); + } + + + /** + * Measures the width of this border. + * + * @return an Insets object whose <code>left</code>, <code>right</code>, + * <code>top</code> and <code>bottom</code> fields indicate the + * width of the border at the respective edge. + * + * @see #getBorderInsets(java.awt.Component, java.awt.Insets) + */ + public Insets getBorderInsets() + { + /* The inherited implementation of EmptyBorder.isBorderOpaque() + * would do the same. It is not clear why this is overriden in the + * Sun implementation, at least not from just reading the JavaDoc. + */ + return this.getBorderInsets(null, null); + } + + + /** + * Returns the color that is used for filling the border, or + * <code>null</code> if the border is filled with repetitions of a + * tile icon. + * + * @return The color (possibly <code>null</code>). + */ + public Color getMatteColor() + { + return color; + } + + + /** + * Returns the icon is used for tiling the border, or + * <code>null</code> if the border is filled with a color instead of + * an icon. + * + * @return The icon (possibly <code>null</code>). + */ + public Icon getTileIcon() + { + return tileIcon; + } + + + /** + * Determines whether this border fills every pixel in its area + * when painting. + * + * @return <code>true</code> if the border is filled with an + * opaque color; <code>false</code> if it is filled with + * a semi-transparent color or with an icon. + */ + public boolean isBorderOpaque() + { + return (color != null) && (color.getAlpha() == 255); + } + + + /** + * Paints a rectangular area of the border. This private helper + * method is called once for each of the border edges + * by {@link #paintBorder}. + * + * @param c the component whose border is being painted. + * @param g the graphics for painting. + * @param x the horizontal position of the rectangular area. + * @param y the vertical position of the rectangular area. + * @param width the width of the rectangular area. + * @param height the height of the rectangular area. + * @param dx the x displacement for repeating the tile. + * @param dy the y displacement for repeating the tile. + */ + private void paintEdge(Component c, Graphics g, + int x, int y, int width, int height, + int dx, int dy) + { + Color oldColor; + int iconWidth, iconHeight; + Graphics clipped; + + if ((width <= 0) || (height <= 0)) + return; + + /* Paint a colored rectangle if desired. */ + if (color != null) + { + oldColor = g.getColor(); + try + { + g.setColor(color); + g.fillRect(x, y, width, height); + } + finally + { + g.setColor(oldColor); + } + return; + } + + // If this border has no icon end painting here. + if (tileIcon == null) + return; + + /* Determine the width and height of the icon. Some icons return + * -1 if it is an image whose dimensions have not yet been + * retrieved. There is not much we can do about this, but we + * should at least avoid entering the paint loop below + * with negative increments. + */ + iconWidth = tileIcon.getIconWidth(); + iconHeight = tileIcon.getIconHeight(); + if ((iconWidth <= 0) || (iconHeight <= 0)) + return; + + dx = dx % iconWidth; + dy = dy % iconHeight; + + clipped = g.create(); + try + { + clipped.setClip(x, y, width, height); + for (int ty = y - dy; ty < y + height; ty += iconHeight) + for (int tx = x - dx; tx < x + width; tx += iconWidth) + tileIcon.paintIcon(c, clipped, tx, ty); + } + finally + { + clipped.dispose(); + } + } +} |