org.eclipse.swt.snippets.Snippet128.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet128.java

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/*******************************************************************************
 * Copyright (c) 2000, 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: bring up a browser
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 *
 * @since 3.0
 */
import org.eclipse.swt.*;
import org.eclipse.swt.browser.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet128 {
    public static void main(String[] args) {
        Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setText("Snippet 128");
        GridLayout gridLayout = new GridLayout();
        gridLayout.numColumns = 3;
        shell.setLayout(gridLayout);
        ToolBar toolbar = new ToolBar(shell, SWT.NONE);
        ToolItem itemBack = new ToolItem(toolbar, SWT.PUSH);
        itemBack.setText("Back");
        ToolItem itemForward = new ToolItem(toolbar, SWT.PUSH);
        itemForward.setText("Forward");
        ToolItem itemStop = new ToolItem(toolbar, SWT.PUSH);
        itemStop.setText("Stop");
        ToolItem itemRefresh = new ToolItem(toolbar, SWT.PUSH);
        itemRefresh.setText("Refresh");
        ToolItem itemGo = new ToolItem(toolbar, SWT.PUSH);
        itemGo.setText("Go");

        GridData data = new GridData();
        data.horizontalSpan = 3;
        toolbar.setLayoutData(data);

        Label labelAddress = new Label(shell, SWT.NONE);
        labelAddress.setText("Address");

        final Text location = new Text(shell, SWT.BORDER);
        data = new GridData();
        data.horizontalAlignment = GridData.FILL;
        data.horizontalSpan = 2;
        data.grabExcessHorizontalSpace = true;
        location.setLayoutData(data);

        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;
        }
        data = new GridData();
        data.horizontalAlignment = GridData.FILL;
        data.verticalAlignment = GridData.FILL;
        data.horizontalSpan = 3;
        data.grabExcessHorizontalSpace = true;
        data.grabExcessVerticalSpace = true;
        browser.setLayoutData(data);

        final Label status = new Label(shell, SWT.NONE);
        data = new GridData(GridData.FILL_HORIZONTAL);
        data.horizontalSpan = 2;
        status.setLayoutData(data);

        final ProgressBar progressBar = new ProgressBar(shell, SWT.NONE);
        data = new GridData();
        data.horizontalAlignment = GridData.END;
        progressBar.setLayoutData(data);

        /* event handling */
        Listener listener = event -> {
            ToolItem item = (ToolItem) event.widget;
            String string = item.getText();
            if (string.equals("Back"))
                browser.back();
            else if (string.equals("Forward"))
                browser.forward();
            else if (string.equals("Stop"))
                browser.stop();
            else if (string.equals("Refresh"))
                browser.refresh();
            else if (string.equals("Go"))
                browser.setUrl(location.getText());
        };
        browser.addProgressListener(new ProgressListener() {
            @Override
            public void changed(ProgressEvent event) {
                if (event.total == 0)
                    return;
                int ratio = event.current * 100 / event.total;
                progressBar.setSelection(ratio);
            }

            @Override
            public void completed(ProgressEvent event) {
                progressBar.setSelection(0);
            }
        });
        browser.addStatusTextListener(event -> status.setText(event.text));
        browser.addLocationListener(LocationListener.changedAdapter(event -> {
            if (event.top)
                location.setText(event.location);
        }));
        itemBack.addListener(SWT.Selection, listener);
        itemForward.addListener(SWT.Selection, listener);
        itemStop.addListener(SWT.Selection, listener);
        itemRefresh.addListener(SWT.Selection, listener);
        itemGo.addListener(SWT.Selection, listener);
        location.addListener(SWT.DefaultSelection, e -> browser.setUrl(location.getText()));

        shell.open();
        browser.setUrl("http://eclipse.org");

        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}