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jeremybenn |
/* DefaultPreviewPanel.java --
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Copyright (C) 2004 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.colorchooser;
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import java.awt.Color;
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import java.awt.Component;
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import java.awt.Dimension;
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import java.awt.FontMetrics;
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import java.awt.Graphics;
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import java.awt.Insets;
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import javax.swing.JColorChooser;
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import javax.swing.JPanel;
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import javax.swing.SwingUtilities;
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import javax.swing.border.Border;
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/**
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* This is the default preview panel for the JColorChooser. The default
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* preview panel is responsible for displaying the currently selected color
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* of the JColorChooser.
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*/
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class DefaultPreviewPanel extends JPanel
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{
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/**
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* This is the border around the preview panel.
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*/
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class PreviewBorder implements Border
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{
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/** This is the value of the top, bottom, top, and right inset. */
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private static final int edge = 20;
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/**
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* This is the distance from the top left corner of the border to the
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* text.
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*/
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private static final int lead = 5;
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/** This is the horizontal gap between the text and the border. */
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private static final int gap = 3;
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/**
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* This method returns the border insets for the given Component.
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*
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* @param c The Component to retrieve insets for.
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*
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* @return The insets for the given Component.
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*/
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public Insets getBorderInsets(Component c)
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{
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return new Insets(edge, edge, edge, edge);
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}
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/**
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* This method returns whether the border is responsible for painting its
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* own background.
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*
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* @return Whether the border is responsible for painting its own
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* background.
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*/
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public boolean isBorderOpaque()
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{
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return true;
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}
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/**
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* This method paints the border for the given component with the graphics
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* object using the given properties.
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*
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* @param c The Component to paint the border for.
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* @param g The Graphics object to paint with.
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* @param x The x location to paint at.
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* @param y The y location to paint at.
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* @param width The width of the component.
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* @param height The height of the component.
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*/
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public void paintBorder(Component c, Graphics g, int x, int y, int width,
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int height)
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{
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Color saved = g.getColor();
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FontMetrics fm = g.getFontMetrics();
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g.setColor(Color.BLACK);
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g.drawLine(x + edge / 2, y + edge / 2, x + edge / 2,
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y + height - edge / 2);
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g.drawLine(x + edge / 2, y + height - edge / 2, x + width - edge / 2,
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y + height - edge / 2);
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g.drawLine(x + width - edge / 2, y + edge / 2, x + width - edge / 2,
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y + height - edge / 2);
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g.drawLine(x + edge / 2, y + edge / 2, x + edge / 2 + lead, y + edge / 2);
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int strwidth = fm.stringWidth("Preview");
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g.drawString("Preview", x + edge / 2 + lead + gap,
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y + edge / 2 + fm.getAscent() / 2);
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g.drawLine(x + lead + edge / 2 + strwidth + gap * 2, y + edge / 2,
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x + width - edge / 2, y + edge / 2);
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g.setColor(saved);
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}
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}
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/** A standard large gap size. */
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private static int largeGap = 6;
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/** A standard small gap size. */
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private static int smallGap = 2;
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/** The size of each side of the square. */
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private static int squareSize = 36;
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/** This padding between the text and the edge of its box. */
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private static int textPadding = 4;
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/** The width of the right most rectangles. */
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private static int rightSideRectWidth = 60;
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/** The sample text. */
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private static String sample = "Sample Text Sample Text";
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/**
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* Creates a new DefaultPreviewPanel object.
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*/
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DefaultPreviewPanel()
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{
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super();
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setBorder(new PreviewBorder());
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}
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/**
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* This method paints the default preview panel with the given Graphics
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* object.
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*
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* @param g The Graphics object.
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*/
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public void paint(Graphics g)
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{
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super.paint(g);
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Color currentColor = null;
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JColorChooser chooser = (JColorChooser) SwingUtilities.getAncestorOfClass(JColorChooser.class,
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this);
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if (chooser != null)
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currentColor = chooser.getColor();
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Color saved = g.getColor();
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Insets insets = getInsets();
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int down = insets.top + squareSize + largeGap;
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int currX = insets.left;
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paintSquare(g, currX, insets.top, Color.WHITE, currentColor, Color.WHITE,
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-1, -1, -1);
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paintSquare(g, currX, down, currentColor, null, null, -1, -1, -1);
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currX += squareSize + largeGap;
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paintSquare(g, currX, insets.top, Color.BLACK, currentColor, Color.WHITE,
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-1, -1, -1);
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paintSquare(g, currX, down, Color.WHITE, currentColor, null, -1, -1, -1);
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currX += squareSize + largeGap;
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paintSquare(g, currX, insets.top, Color.WHITE, currentColor, Color.BLACK,
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-1, -1, -1);
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paintSquare(g, currX, down, Color.BLACK, currentColor, null, -1, -1, -1);
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FontMetrics fm = g.getFontMetrics();
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int strWidth = fm.stringWidth(sample);
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int strHeight = fm.getHeight();
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currX += squareSize + largeGap;
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int boxWidth = 2 * textPadding + strWidth;
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int boxHeight = 2 * textPadding + strHeight;
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int first = insets.top + textPadding;
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int second = insets.top + boxHeight + smallGap;
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int third = insets.top + 2 * (boxHeight + smallGap);
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g.setColor(Color.WHITE);
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g.fillRect(currX, third, boxWidth, boxHeight);
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g.setColor(currentColor);
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g.drawString(sample, currX + textPadding,
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first + textPadding + fm.getAscent());
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g.fillRect(currX, second, boxWidth, boxHeight);
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g.drawString(sample, currX + textPadding,
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third + textPadding + fm.getAscent());
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g.setColor(Color.BLACK);
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g.drawString(sample, currX + textPadding,
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second + textPadding + fm.getAscent());
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currX += boxWidth + largeGap;
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g.setColor(Color.WHITE);
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g.fillRect(currX, insets.top, rightSideRectWidth, squareSize
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+ largeGap / 2);
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g.setColor(currentColor);
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g.fillRect(currX, insets.top + squareSize + largeGap / 2,
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rightSideRectWidth, squareSize + largeGap / 2);
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g.setColor(saved);
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}
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/**
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* This method creates and paints a square. The square has two smaller
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* squares inside of it. Each of the three squares has their sizes
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* determined by the size arguments. If the size is not given (by passing
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* in -1), then the size is determined automatically.
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*
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* @param g The Graphics object to paint with.
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* @param x The x location to paint at.
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* @param y The y location to paint at.
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* @param first The color of the first square.
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* @param second The color of the second square.
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* @param third The color of the third square.
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* @param firstSize The size of the first square.
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* @param secondSize The size of the second square.
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* @param thirdSize The size of the third square.
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*/
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private void paintSquare(Graphics g, int x, int y, Color first,
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Color second, Color third, int firstSize,
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int secondSize, int thirdSize)
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{
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Color saved = g.getColor();
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if (firstSize == -1)
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firstSize = squareSize;
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if (secondSize == -1)
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secondSize = squareSize * 2 / 3;
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if (thirdSize == -1)
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thirdSize = squareSize / 3;
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int secondOffset = (firstSize - secondSize) / 2;
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int thirdOffset = (firstSize - thirdSize) / 2;
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if (first == null)
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return;
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g.setColor(first);
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g.fillRect(x, y, firstSize, firstSize);
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if (second == null)
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return;
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g.setColor(second);
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g.fillRect(x + secondOffset, y + secondOffset, secondSize, secondSize);
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if (third == null)
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return;
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g.setColor(third);
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g.fillRect(x + thirdOffset, y + thirdOffset, thirdSize, thirdSize);
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g.setColor(saved);
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}
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/**
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* This method returns the preferred size of the default preview panel.
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*
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* @return The preferred size of the default preview panel.
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*/
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public Dimension getPreferredSize()
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{
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Graphics g = getGraphics();
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FontMetrics fm = g.getFontMetrics();
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g.dispose();
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int strWidth = fm.stringWidth(sample);
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int strHeight = fm.getHeight();
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int h1 = (strHeight + 2 * textPadding) * 3 + 2 * smallGap;
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int h2 = 2 * squareSize + largeGap;
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int height = Math.max(h1, h2);
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int width = 3 * (squareSize + largeGap) + strWidth + 2 * textPadding
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+ largeGap + rightSideRectWidth;
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Insets insets = getInsets();
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return new Dimension(width + insets.right + insets.left,
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height + insets.top + insets.bottom);
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}
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}
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