org.eclipse.swt.snippets.Snippet362.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet362.java

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/*******************************************************************************
 * Copyright (c) 2012, 2017 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * Browser example snippet: listen for DOM mousedown events with javascript (improved
 * implementation for Eclipse/SWT 3.5 and newer).
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.browser.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet362 {

    public static void main(String[] args) {
        final String SCRIPT = "document.onmousedown = function(e) {if (!e) {e = window.event;} if (e) {mouseDownHappened(e.clientX, e.clientY);}}";
        Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setText("Snippet 362");
        shell.setLayout(new FillLayout());
        final Browser browser;
        try {
            browser = new Browser(shell, SWT.NONE);
        } catch (SWTError e) {
            System.out.println("Could not instantiate Browser: " + e.getMessage());
            display.dispose();
            return;
        }
        browser.addProgressListener(ProgressListener.completedAdapter(event -> {
            final BrowserFunction function = new CustomFunction(browser, "mouseDownHappened");
            browser.execute(SCRIPT);
            browser.addLocationListener(new LocationAdapter() {
                @Override
                public void changed(LocationEvent event) {
                    browser.removeLocationListener(this);
                    function.dispose();
                }
            });
        }));

        browser.setUrl("eclipse.org");
        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);
        }

        @Override
        public Object function(Object[] arguments) {
            System.out.println(
                    "mouseDown: " + ((Number) arguments[0]).intValue() + "," + ((Number) arguments[1]).intValue());
            return null;
        }
    }
}