📄 snippet307.java
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/******************************************************************************* * Copyright (c) 2000, 2004 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/package org.eclipse.swt.snippets;/* * Browser example snippet: call Java from JavaScript. * * For a list of all SWT example snippets see * http://www.eclipse.org/swt/snippets/ * * @since 3.5 */import org.eclipse.swt.*;import org.eclipse.swt.browser.*;import org.eclipse.swt.layout.*;import org.eclipse.swt.widgets.*;public class Snippet307 {public static void main (String [] args) { Display display = new Display (); Shell shell = new Shell (display); shell.setLayout (new FillLayout ()); shell.setBounds (10,10,300,200); final Browser browser; try { browser = new Browser (shell, SWT.NONE); } catch (SWTError e) { System.out.println ("Could not instantiate Browser: " + e.getMessage ()); return; } browser.setText (createHTML ()); final BrowserFunction function = new CustomFunction (browser, "theJavaFunction"); browser.addProgressListener (new ProgressAdapter () { public void completed (ProgressEvent event) { browser.addLocationListener (new LocationAdapter () { public void changed (LocationEvent event) { browser.removeLocationListener (this); System.out.println ("left java function-aware page, so disposed CustomFunction"); function.dispose (); } }); } }); shell.open (); while (!shell.isDisposed ()) { if (!display.readAndDispatch ()) display.sleep (); } display.dispose ();}static class CustomFunction extends BrowserFunction { CustomFunction (Browser browser, String name) { super (browser, name); } public Object function (Object[] arguments) { System.out.println ("theJavaFunction() called from javascript with args:"); for (int i = 0; i < arguments.length; i++) { Object arg = arguments[i]; if (arg == null) { System.out.println ("\t-->null"); } else { System.out.println ("\t-->" + arg.getClass ().getName () + ": " + arg.toString ()); } } Object returnValue = new Object[] { new Short ((short)3), new Boolean (true), null, new Object[] {"a string", new Boolean (false)}, "hi", new Float (2.0f / 3.0f), }; //int z = 3 / 0; // uncomment to cause a java error instead return returnValue; }}static String createHTML () { StringBuffer buffer = new StringBuffer (); buffer.append ("<html>\n"); buffer.append ("<head>\n"); buffer.append ("<script language=\"JavaScript\">\n"); buffer.append ("function function1() {\n"); buffer.append (" var result;\n"); buffer.append (" try {\n"); buffer.append (" result = theJavaFunction(12, false, null, [3.6, ['swt', true]], 'eclipse');\n"); buffer.append (" } catch (e) {\n"); buffer.append (" alert('a java error occurred: ' + e.message);\n"); buffer.append (" return;\n"); buffer.append (" }\n"); buffer.append (" for (var i = 0; i < result.length; i++) {\n"); buffer.append (" alert('returned ' + i + ': ' + result[i]);\n"); buffer.append (" }\n"); buffer.append ("}\n"); buffer.append ("</script>\n"); buffer.append ("</head>\n"); buffer.append ("<body>\n"); buffer.append ("<input id=button type=\"button\" value=\"Push to Invoke Java\" onclick=\"function1();\">\n"); buffer.append ("<p><a href=\"http://www.eclipse.org\">go to eclipse.org</a>\n"); buffer.append ("</body>\n"); buffer.append ("</html>\n"); return buffer.toString ();}}⌨️ 快捷键说明
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