// Copyright 1996, Marimba Inc. All Rights Reserved. // @(#)AppletWidget.java, 1.16, 11/15/96 package marimba.gui; import java.io.*; import java.net.*; import java.awt.*; import java.util.*; import java.applet.*; import marimba.util.*; import marimba.persist.*; /** * A wrapper widget for applets. * * @author Arthur van Hoff * @version 1.16, 11/15/96 */ public class AppletWidget extends AWTWidget implements AppletStub, AppletContext { /** * The parameters for the applet stored in a properties object. * @see #paramaters */ public Properties param = new Props(null, null); /** * The applet code. * @see #getCode * @see #setCode */ public String code = "java.applet.Applet"; /** * The parameters for the applet. * @see #getParameters * @see #setParameters */ public String parameters = ""; /** * Get the properties of this widget. */ public void getProperties(PropertyList list) { super.getProperties(list); list.setString("code", code, "java.applet.Applet"); list.setString("parameters", parameters, ""); } /** * Set the properties of this widget. */ public void setProperties(PropertyList list) { super.setProperties(list); parameters = list.getString("parameters", ""); code = list.getString("code", "java.applet.Applet"); param = new Properties(); try { param.load(new StringBufferInputStream(parameters)); } catch (IOException e) { e.printStackTrace(); } } /** * Get the code of this applet. * @see #code */ public String getCode() { return code; } /** * Set the code of the applet. * This will actually change the applet displayed. * @see #code */ public void setCode(String code) { if (code != null && !code.equals(this.code)) { this.code = code; stop(); destroy(); init(); start(); repaint(); } } /** * Get the parameters of this widget (as a string seperated by * newlines). * @see #parameters */ public String getParameters() { return parameters; } /** * Set the parameters for this widget (as a string seperated by * newlines). * @see #parameters */ public void setParameters(String parameters) { if (parameters == null) { parameters = ""; } if (!this.parameters.equals(parameters)) { this.parameters = parameters; param = new Props(null, null); try { param.load(new StringBufferInputStream(parameters)); } catch (IOException e) { e.printStackTrace(); } if (comp.isVisible()) { stop(); destroy(); init(); start(); } else { destroy(); init(); } } } /** * Get the editor for this widget. */ public String getEditor() { return "marimba.builder.AppletWidgetEditor"; } /** * Create the AWT component. */ public Component newComponent() { try { return (Component)getPresentation().newInstance(code); } catch (Throwable e) { e.printStackTrace(); return null; } } /** * Initialize the applet. */ public void init() { super.init(); if (comp instanceof Applet) { comp.resize(width, height); try { Applet applet = (Applet)comp; applet.setStub(this); applet.init(); applet.validate(); } catch (ThreadDeath e) { throw e; } catch (Throwable e) { e.printStackTrace(); } } } /** * Start the applet. */ public void start() { super.start(); if (comp instanceof Applet) { comp.resize(width, height); try { Applet applet = (Applet)comp; applet.start(); applet.validate(); } catch (ThreadDeath e) { throw e; } catch (Throwable e) { e.printStackTrace(); } } } /** * Stop the applet. */ public void stop() { if (comp instanceof Applet) { try { ((Applet)comp).stop(); } catch (ThreadDeath e) { throw e; } catch (Throwable e) { e.printStackTrace(); } } super.stop(); } /** * Destroy the applet. */ public void destroy() { if (comp instanceof Applet) { try { ((Applet)comp).destroy(); } catch (ThreadDeath e) { throw e; } catch (Throwable e) { e.printStackTrace(); } } super.destroy(); } /** * Paint the widget (if the awt component is not visible). */ public void paint(Graphics g) { if (getPlayerPanel().editing()) { FontMetrics fm = getFontMetrics(ComponentWidget.msgFont); g.drawRect(0, 0, width-1, height-1); if (editor == null) { String str = null; if (comp == null) { str = "Instantiation Error"; } else { str = "Applet: " + code; } g.setFont(ComponentWidget.msgFont); g.drawString(str, 5, 5 + fm.getAscent()); } } } // AppletStub routines public boolean isActive() { return (getPlayerPanel() != null) && isShowing(); } public URL getDocumentBase() { return getPresentation().getBase(); } public URL getCodeBase() { return getPresentation().getBase(); } public String getParameter(String name) { name = name.toLowerCase(); if ("width".equals(name)) { return String.valueOf(width); } if ("height".equals(name)) { return String.valueOf(height); } if ("code".equals(name)) { return code; } return param.getProperty(name); } public AppletContext getAppletContext() { return this; } public void appletResize(int width, int height) { } // AppletContext routines public AudioClip getAudioClip(URL url) { return getAudioClip(url.toExternalForm()); } public Image getImage(URL url) { return getImage(url.toExternalForm()); } public Applet getApplet(String name) { name = name.toLowerCase(); for (Enumeration e = getApplets() ; e.hasMoreElements() ; ) { Applet applet = (Applet)e.nextElement(); String nm = applet.getParameter("name"); if ((nm != null) && nm.toLowerCase().equals(name)) { return applet; } } return null; } public Enumeration getApplets() { Vector v = new Vector(); getApplets(getPresentation(), v); return v.elements(); } void getApplets(Widget w, Vector v) { if (w instanceof AppletWidget) { v.addElement(((AppletWidget)w).comp); } for (int i = 0 ; i < w.nwidgets ; i++) { getApplets(w.widgets[i], v); } } public void showDocument(URL url) { Environment.showURL(url); } public void showDocument(URL url, String target) { Environment.showURL(url); } public void showStatus(String status) { System.err.println(status); } }