Revision: 595 Author: allain.lalonde Date: Tue Jul 28 10:22:29 2009 Log: Added PHtml and HTMLExample
I've made it support link clicks by having a getClickedAddress(Point2D point) method. http://code.google.com/p/piccolo2d/source/detail?r=595 Added: /piccolo2d.java/branches/phtml/core/src/main/java/edu/umd/cs/piccolo/nodes/PHtml.java /piccolo2d.java/branches/phtml/examples/src/main/java/edu/umd/cs/piccolo/examples/HTMLExample.java Modified: /piccolo2d.java/branches/phtml/examples/src/main/java/edu/umd/cs/piccolo/examples/ExampleRunner.java ======================================= --- /dev/null +++ /piccolo2d.java/branches/phtml/core/src/main/java/edu/umd/cs/piccolo/nodes/PHtml.java Tue Jul 28 10:22:29 2009 @@ -0,0 +1,242 @@ +package edu.umd.cs.piccolo.nodes; + +import java.awt.Color; +import java.awt.Font; +import java.awt.Graphics2D; +import java.awt.Rectangle; +import java.awt.geom.Point2D; +import java.awt.geom.Rectangle2D; +import java.util.regex.Matcher; +import java.util.regex.Pattern; + +import javax.swing.JLabel; +import javax.swing.JTextField; +import javax.swing.plaf.basic.BasicHTML; +import javax.swing.text.Position; +import javax.swing.text.View; + +import edu.umd.cs.piccolo.PNode; +import edu.umd.cs.piccolo.util.PPaintContext; + +/** + * PHtml is a Piccolo node for rendering HTML text. It uses a JLabel under the + * hood so you have the same restrictions regarding html as you have when using + * standard Swing components (HTML 3.2 + subset of CSS 1.0). + * + * @author Chris Malley (cmal...@pixelzoom.com) + * @author Sam Reid + */ +public class PHtml extends PNode { + + /** + * Allows for future serialization code to understand versioned binary + * formats. + */ + private static final long serialVersionUID = 1L; + + private static final Pattern tagPattern = Pattern.compile("</?[^>]+>"); + private static final Pattern linkPattern = Pattern.compile("<a .*href=(\\\"([^\\\"]*)\\\"|\\\'([^\\\"]*)\\\')"); + + private static final Font DEFAULT_FONT = new JTextField().getFont(); + private static final Color DEFAULT_HTML_COLOR = Color.BLACK; + + /** + * The property name that identifies a change of this node's font (see + * {...@link #getFont getFont}). Both old and new value will be set in any + * property change event. + */ + public static final String PROPERTY_FONT = "font"; + public static final int PROPERTY_CODE_FONT = 1 << 20; + + /** + * The property name that identifies a change of this node's html (see + * {...@link #getHTML getHTML}). Both old and new value will be set in any + * property change event. + */ + public static final String PROPERTY_HTML = "html"; + public static final int PROPERTY_CODE_HTML = 1 << 21; + + /** + * The property name that identifies a change of this node's html color (see + * {...@link #getHtml getHTMLColor}). Both old and new value will be set in any + * property change event. + */ + public static final String PROPERTY_HTML_COLOR = "html color"; + public static final int PROPERTY_CODE_HTML_COLOR = 1 << 22; + + private JLabel htmlLabel; + private View htmlView; + private final Rectangle htmlBounds; + + public PHtml() { + this(null, DEFAULT_FONT, DEFAULT_HTML_COLOR); + } + + public PHtml(String html) { + this(html, DEFAULT_FONT, DEFAULT_HTML_COLOR); + } + + public PHtml(String html, Color htmlColor) { + this(html, DEFAULT_FONT, htmlColor); + } + + public PHtml(String html, Font font, Color htmlColor) { + htmlLabel = new JLabel(html); + htmlLabel.setFont(font); + htmlLabel.setForeground(htmlColor); + htmlBounds = new Rectangle(); + update(); + } + + /** + * @return HTML being rendered by this node + */ + public String getHTML() { + return htmlLabel.getText(); + } + + /** + * Changes the HTML being rendered by this node + * + * @param newHtml + */ + public void setHTML(String newHtml) { + if (isNewHtml(newHtml)) { + String oldHtml = htmlLabel.getText(); + htmlLabel.setText(newHtml); + update(); + firePropertyChange(PROPERTY_CODE_HTML, PROPERTY_HTML, oldHtml, newHtml); + } + } + + private boolean isNewHtml(String html) { + return (htmlLabel.getText() != null && html == null) || (htmlLabel.getText() == null && html != null) + || (!htmlLabel.getText().equals(html)); + } + + /** + * Gets the font. + * + * @return the font + */ + public Font getFont() { + return htmlLabel.getFont(); + } + + /** + * Set the font of this PHtml. + */ + public void setFont(Font newFont) { + Font oldFont = htmlLabel.getFont(); + htmlLabel.setFont(newFont); + update(); + + firePropertyChange(PROPERTY_CODE_FONT, PROPERTY_FONT, oldFont, newFont); + } + + /** + * Gets the color used to render the HTML. If you want to get the paint used + * for the node, use getPaint. + * + * @return the color used to render the HTML. + */ + public Color getHTMLColor() { + return htmlLabel.getForeground(); + } + + /** + * Sets the color used to render the HTML. If you want to set the paint used + * for the node, use setPaint. + * + * @param newColor + */ + public void setHTMLColor(Color newColor) { + Color oldColor = htmlLabel.getForeground(); + htmlLabel.setForeground(newColor); + repaint(); + firePropertyChange(PROPERTY_CODE_HTML_COLOR, PROPERTY_HTML_COLOR, oldColor, newColor); + } + + /** + * Applies all properties to the underlying JLabel, creates an htmlView and + * updates bounds + */ + private void update() { + htmlLabel.setSize(htmlLabel.getPreferredSize()); + htmlView = BasicHTML.createHTMLView(htmlLabel, htmlLabel.getText() == null ? "" : htmlLabel.getText()); + + Rectangle2D bounds = getBounds(); + htmlBounds.setRect(0, 0, bounds.getWidth(), bounds.getHeight()); + repaint(); + } + + public boolean setBounds(double x, double y, double width, double height) { + boolean boundsChanged = super.setBounds(x, y, width, height); + update(); + return boundsChanged; + } + + public boolean setBounds(Rectangle2D newBounds) { + boolean boundsChanged = super.setBounds(newBounds); + update(); + return boundsChanged; + } + + /* + * Paints the node. The HTML string is painted last, so it appears on top of + * any child nodes. + * + * @param paintContext + */ + protected void paint(PPaintContext paintContext) { + super.paint(paintContext); + + if (htmlLabel.getWidth() != 0 && htmlLabel.getHeight() != 0) { + Graphics2D g2 = paintContext.getGraphics(); + + htmlView.paint(g2, htmlBounds); + } + } + + /** + * Returns the address specified in the link under the given point. + * + * @param clickedPoint + * @return String containing value of href for clicked link, or null if no + * link clicked + */ + public String getClickedAddress(Point2D clickedPoint) { + int position = pointToModelIndex(clickedPoint); + + Matcher tagMatcher = tagPattern.matcher(htmlLabel.getText()); + + String address = null; + + while (tagMatcher.find()) { + if (position <= tagMatcher.start()) { + break; + } + position += tagMatcher.end() - tagMatcher.start(); + + String tag = tagMatcher.group().toLowerCase(); + if ("</a>".equals(tag)) { + address = null; + } + else { + Matcher linkMatcher = linkPattern.matcher(tag); + if (linkMatcher.find()) { + address = linkMatcher.group(2); + if (address == null) + address = linkMatcher.group(3); + } + } + } + + return address; + } + + private int pointToModelIndex(Point2D clickedPoint) { + Position.Bias[] biasReturn = new Position.Bias[1]; + return htmlView.viewToModel((float) clickedPoint.getX(), (float) clickedPoint.getY(), getBounds(), biasReturn); + } +} ======================================= --- /dev/null +++ /piccolo2d.java/branches/phtml/examples/src/main/java/edu/umd/cs/piccolo/examples/HTMLExample.java Tue Jul 28 10:22:29 2009 @@ -0,0 +1,72 @@ +package edu.umd.cs.piccolo.examples; + +import java.awt.geom.Point2D; + +import javax.swing.JOptionPane; + +import edu.umd.cs.piccolo.PCanvas; +import edu.umd.cs.piccolo.PNode; +import edu.umd.cs.piccolo.event.PBasicInputEventHandler; +import edu.umd.cs.piccolo.event.PInputEvent; +import edu.umd.cs.piccolo.nodes.PHtml; +import edu.umd.cs.piccolox.PFrame; + +public class HTMLExample extends PFrame { + private StringBuffer html; + + public HTMLExample() { + this(null); + } + + public HTMLExample(PCanvas aCanvas) { + super("HTMLExample", false, aCanvas); + } + + public void initialize() { + html = new StringBuffer(); + html.append("<p style='margin-bottom: 10px;'>"); + html.append("This is an example <a href='#testing'>of what can</a> be done with PHtml."); + html.append("</p>"); + html.append("<p>It supports:</p>"); + appendFeatures(); + + final PHtml htmlNode = new PHtml(html.toString()); + htmlNode.setBounds(0, 0, 400, 400); + getCanvas().getLayer().addChild(htmlNode); + + getCanvas().addInputEventListener(new PBasicInputEventHandler() { + public void mouseClicked(PInputEvent event) { + PNode clickedNode = event.getPickedNode(); + if (!(clickedNode instanceof PHtml)) + return; + + Point2D clickPoint = event.getPositionRelativeTo(clickedNode); + PHtml htmlNode = (PHtml)clickedNode; + + String url = htmlNode.getClickedAddress(clickPoint); + JOptionPane.showMessageDialog(null, url); + } + }); + } + + private void appendFeatures() { + html.append("<ul>"); + html.append("<li><b>HTML</b> 3.2</li>"); + html.append("<li><font style='color:red; font-style: italic;'>Limited CSS 1.0</font></li>"); + html.append("<li>Tables:"); + appendTable(); + html.append("</li>"); + html.append("</ul>"); + } + + private void appendTable() { + html.append("<table border='1' cellpadding='2' cellspacing='0'>"); + html.append("<tr><th>Col 1</th><th>Col 2</th></tr>"); + html.append("<tr><td>Col 1 val</td><td>Col 2 val</td></tr>"); + html.append("</table>"); + } + + public static void main(String[] args) { + new HTMLExample(); + } +} ======================================= --- /piccolo2d.java/branches/phtml/examples/src/main/java/edu/umd/cs/piccolo/examples/ExampleRunner.java Mon Jul 27 22:02:02 2009 +++ /piccolo2d.java/branches/phtml/examples/src/main/java/edu/umd/cs/piccolo/examples/ExampleRunner.java Tue Jul 28 10:22:29 2009 @@ -86,13 +86,13 @@ BirdsEyeViewExample.class, CameraExample.class, CenterExample.class, ChartLabelExample.class, ClipExample.class, CompositeExample.class, DynamicExample.class, EventHandlerExample.class, FullScreenNodeExample.class, GraphEditorExample.class, GridExample.class, GroupExample.class, - HandleExample.class, HelloWorldExample.class, HierarchyZoomExample.class, KeyEventFocusExample.class, - LayoutExample.class, LensExample.class, NavigationExample.class, NodeCacheExample.class, - NodeEventExample.class, NodeExample.class, NodeLinkExample.class, PanToExample.class, - PathExample.class, PositionExample.class, PositionPathActivityExample.class, PulseExample.class, - ScrollingExample.class, SelectionExample.class, SquiggleExample.class, StickyExample.class, - StickyHandleLayerExample.class, StrokeExample.class, TextExample.class, TooltipExample.class, - TwoCanvasExample.class, WaitForActivitiesExample.class }); + HandleExample.class, HelloWorldExample.class, HierarchyZoomExample.class, HTMLExample.class, + KeyEventFocusExample.class, LayoutExample.class, LensExample.class, NavigationExample.class, + NodeCacheExample.class, NodeEventExample.class, NodeExample.class, NodeLinkExample.class, + PanToExample.class, PathExample.class, PositionExample.class, PositionPathActivityExample.class, + PulseExample.class, ScrollingExample.class, SelectionExample.class, SquiggleExample.class, + StickyExample.class, StickyHandleLayerExample.class, StrokeExample.class, TextExample.class, + TooltipExample.class, TwoCanvasExample.class, WaitForActivitiesExample.class }); } private void addExampleButtons(JPanel panel, Class[] exampleClasses) { --~--~---------~--~----~------------~-------~--~----~ Piccolo2D Developers Group: http://groups.google.com/group/piccolo2d-dev?hl=en -~----------~----~----~----~------~----~------~--~---
