PleaseHelp.java

package io.sloeber.core;

import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTError;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.browser.ProgressEvent;
import org.eclipse.swt.browser.ProgressListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;
import org.osgi.framework.FrameworkUtil;

public class PleaseHelp extends Dialog {

	public Browser browser = null;
	public PleaseHelp ph;
	private static String myhelpLocation;

	public PleaseHelp(Shell parent) {
		super(parent);
		this.ph = this;
	}

	@Override
	protected Control createContents(Composite parent) {
		GridLayout gridLayout = new GridLayout();
		gridLayout.numColumns = 3;
		parent.setLayout(gridLayout);

		try {
			this.browser = new Browser(parent, SWT.NONE);
		} catch (SWTError e) {
			System.out.println("Could not instantiate Browser: " + e.getMessage()); //$NON-NLS-1$
		}
		GridData data = new GridData();
		data.horizontalAlignment = GridData.FILL;
		data.verticalAlignment = GridData.FILL;
		data.horizontalSpan = 3;
		data.grabExcessHorizontalSpace = true;
		data.grabExcessVerticalSpace = true;
		this.browser.setLayoutData(data);

		this.browser.addProgressListener(new ProgressListener() {
			@Override
			public void changed(ProgressEvent event) {
				// I'm not interested in change
			}

			@Override
			public void completed(ProgressEvent event) {
				PleaseHelp.this.ph.setBlockOnOpen(false);
				PleaseHelp.this.ph.open();
			}
		});

		this.buttonBar = createButtonBar(parent);

		org.osgi.framework.Version version = FrameworkUtil.getBundle(getClass()).getVersion();
		String url = myhelpLocation + "?os=" + Platform.getOS(); //$NON-NLS-1$
		url += "&arch=" + Platform.getOSArch(); //$NON-NLS-1$
		url += "&majorVersion=" + version.getMajor(); //$NON-NLS-1$
		url += "&minorVersion=" + version.getMinor(); //$NON-NLS-1$
		url += "µVersion=" + version.getMicro(); //$NON-NLS-1$
		url += "&qualifierVersion=" + version.getQualifier(); //$NON-NLS-1$
		this.browser.setUrl(url);

		return parent;

	}

	/**
	 * Static helper function to popup the help jantje page
	 *
	 */
	static void doHelp(String helpLocation) {
		myhelpLocation = helpLocation;
		PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable() {
			@Override
			public void run() {
				Shell activeShell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
				new PleaseHelp(activeShell).create();
			}
		});
	}

	@Override
	protected Point getInitialSize() {
		return this.getShell().computeSize(SWT.MAX, SWT.MAX, true);
	}
}