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Diffstat (limited to 'src/jake2/CompatibilityApplet.java')
-rwxr-xr-x | src/jake2/CompatibilityApplet.java | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/jake2/CompatibilityApplet.java b/src/jake2/CompatibilityApplet.java new file mode 100755 index 0000000..216b560 --- /dev/null +++ b/src/jake2/CompatibilityApplet.java @@ -0,0 +1,157 @@ +/* + * Copyright 2008 Sun Microsystems, Inc. All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of Sun Microsystems nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +package jake2; + +import java.applet.*; +import java.awt.Canvas; +import java.awt.Color; +import java.awt.Font; +import java.awt.FontMetrics; +import java.awt.Frame; +import java.awt.Graphics; +import java.awt.Graphics2D; +import java.awt.event.*; +import java.awt.font.*; +import java.awt.geom.*; +import java.net.*; +import java.text.*; +import java.util.*; + +/** + * An applet to smooth the adoption of newer applet content which runs + * only with the new Java Plug-In: in particular, applets launched via + * JNLP. It displays some informative text; clicking on the text will + * open a new browser window pointing to the download page for the new + * Java Plug-In. This applet runs even on very early versions of the + * JRE and can be referenced from the applet tag's code / archive + * attributes while the jnlp_href can point to the new-style applet's + * code. + * <P> + * In 6u10 build 13, it is necessary to copy this applet's source code + * and rename it to be exactly the same class name as is in the + * main-class attribute in the JNLP file, preferably referenced via + * the archive attribute in a jar named something like + * "BackwardCompatibility.jar". In 6u10 build 14, the applet tag may + * refer to this class via its code attribute, and the JNLP file may + * point to an entirely different class name, allowing one copy of the + * compatibility applet to be used for many different JNLP-launched + * applets. + * <P> + * Parameters supported: + * <P> + * <CODE>compat_fontsize</CODE> - the font size used to draw the text.<BR> + * <CODE>compat_fgcolor</CODE> - the color used to draw the text.<BR> + * <CODE>compat_bgcolor</CODE> - the color used to draw the text. + * + * @author Kenneth Russell + */ + +public class CompatibilityApplet extends java.applet.Applet { + private Font font; + private static final String inputText = "Click here to get the new Java Plug-In"; + private static final String url = "https://jdk6.dev.java.net/6uNea.html"; + + public void init() { + int fontSize = 36; + try { + fontSize = Integer.parseInt(getParameter("compat_fontsize")); + } catch (Exception e) { + } + Color fgColor = Color.black; + Color bgColor = Color.white; + try { + fgColor = Color.decode(getParameter("compat_fgcolor")); + } catch (Exception e) { + } + try { + bgColor = Color.decode(getParameter("compat_bgcolor")); + } catch (Exception e) { + } + font = new Font("SansSerif", Font.PLAIN, fontSize); + setForeground(fgColor); + setBackground(bgColor); + addMouseListener(new MouseAdapter() { + public void mouseClicked(MouseEvent e) { + try { + getAppletContext().showDocument(new URL(url), "_blank"); + } catch (Exception ex) { + } + } + }); + } + + static class LineInfo { + String text; + float width; + float height; + + LineInfo(String text, float width, float height) { + this.text = text; + this.width = width; + this.height = height; + } + } + + public void paint(Graphics graphics) { + Graphics2D g = (Graphics2D) graphics; + List/*<LineInfo>*/ lines = new ArrayList(); + FontMetrics fm = g.getFontMetrics(); + FontRenderContext frc = g.getFontRenderContext(); + Map attrs = new HashMap(); + attrs.put(TextAttribute.FONT, font); + float totalHeight = 0; + int curPos = 0; + AttributedString str = new AttributedString(inputText, attrs); + LineBreakMeasurer measurer = new LineBreakMeasurer(str.getIterator(), frc); + while (measurer.getPosition() < inputText.length()) { + // Give us a few pixels inset from the edges + int nextPos = measurer.nextOffset(getWidth() - 10); + String line = inputText.substring(curPos, nextPos); + GlyphVector gv = font.createGlyphVector(frc, line); + Rectangle2D bounds = gv.getVisualBounds(); + float height = (float) bounds.getHeight() + 5; + lines.add(new LineInfo(line, (float) bounds.getWidth(), height)); + totalHeight += height; + curPos = nextPos; + measurer.setPosition(curPos); + } + // Draw the strings centered vertically and horizontally in this component + g.setFont(font); + float curY = (getHeight() - totalHeight) / 2; + for (Iterator iter = lines.iterator(); iter.hasNext(); ) { + LineInfo line = (LineInfo) iter.next(); + curY += line.height; + float x = (getWidth() - line.width) / 2; + g.drawString(line.text, (int) x, (int) curY); + } + } +} |