Java tutorial
/******************************************************************************* * Copyright (c) 2011 Red Hat, Inc. * 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: * Red Hat Incorporated - initial API and implementation *******************************************************************************/ package org.eclipse.linuxtools.internal.cdt.libhover.devhelp.preferences; import java.io.File; import java.io.FileOutputStream; import java.io.ObjectOutputStream; import java.util.Collection; import java.util.Iterator; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.core.runtime.jobs.IJobChangeEvent; import org.eclipse.core.runtime.jobs.IJobChangeListener; import org.eclipse.core.runtime.jobs.Job; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.preference.DirectoryFieldEditor; import org.eclipse.jface.preference.FieldEditorPreferencePage; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.linuxtools.cdt.libhover.LibHoverInfo; import org.eclipse.linuxtools.cdt.libhover.LibhoverPlugin; import org.eclipse.linuxtools.cdt.libhover.devhelp.DevHelpPlugin; import org.eclipse.linuxtools.internal.cdt.libhover.LibHover; import org.eclipse.linuxtools.internal.cdt.libhover.LibHoverLibrary; import org.eclipse.linuxtools.internal.cdt.libhover.devhelp.ParseDevHelp; import org.eclipse.swt.SWT; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; /** * This class represents a preference page that * is contributed to the Preferences dialog. By * subclassing <samp>FieldEditorPreferencePage</samp>, we * can use the field support built into JFace that allows * us to create a page that is small and knows how to * save, restore and apply itself. * <p> * This page is used to modify preferences only. They * are stored in the preference store that belongs to * the main plug-in class. That way, preferences can * be accessed directly via the preference store. */ public class LibHoverPreferencePage extends FieldEditorPreferencePage implements IWorkbenchPreferencePage { private final static String DEVHELP_DIR = "Libhover.Devhelp.Directory"; //$NON-NLS-1$ private final static String GENERATE = "Libhover.Devhelp.Generate.lbl"; //$NON-NLS-1$ private final static String REGENERATE_MSG = "Libhover.Devhelp.Regenerate.msg"; //$NON-NLS-1$ private final static String TITLE = "Libhover.Devhelp.Preference.title"; //$NON-NLS-1$ private Button generateButton; public LibHoverPreferencePage() { super(GRID); setPreferenceStore(DevHelpPlugin.getDefault().getPreferenceStore()); } private class DevhelpStringFieldEditor extends DirectoryFieldEditor { public DevhelpStringFieldEditor(String name, String labelText, Composite parent) { super(name, labelText, parent); setFilterPath(new File(DevHelpPlugin.getDefault().getPreferenceStore().getString(name))); } } private synchronized void regenerate() { generateButton.setEnabled(false); Job k = new Job(LibHoverMessages.getString(REGENERATE_MSG)) { @Override protected IStatus run(IProgressMonitor monitor) { // TODO Auto-generated method stub IPreferenceStore ps = DevHelpPlugin.getDefault().getPreferenceStore(); ParseDevHelp.DevHelpParser p = new ParseDevHelp.DevHelpParser( ps.getString(PreferenceConstants.DEVHELP_DIRECTORY)); LibHoverInfo hover = p.parse(monitor); // Update the devhelp library info if it is on library list Collection<LibHoverLibrary> libs = LibHover.getLibraries(); for (Iterator<LibHoverLibrary> i = libs.iterator(); i.hasNext();) { LibHoverLibrary l = i.next(); if (l.getName().equals("devhelp")) { //$NON-NLS-1$ l.setHoverinfo(hover); break; } } try { // Now, output the LibHoverInfo for caching later IPath location = LibhoverPlugin.getDefault().getStateLocation().append("C"); //$NON-NLS-1$ File ldir = new File(location.toOSString()); ldir.mkdir(); location = location.append("devhelp.libhover"); //$NON-NLS-1$ FileOutputStream f = new FileOutputStream(location.toOSString()); ObjectOutputStream out = new ObjectOutputStream(f); out.writeObject(hover); out.close(); monitor.done(); } catch (Exception e) { monitor.done(); return new Status(IStatus.ERROR, DevHelpPlugin.PLUGIN_ID, e.getLocalizedMessage(), e); } return Status.OK_STATUS; } }; k.setUser(true); k.addJobChangeListener(new IJobChangeListener() { public void aboutToRun(IJobChangeEvent event) { // TODO Auto-generated method stub } public void awake(IJobChangeEvent event) { // TODO Auto-generated method stub } public void done(IJobChangeEvent event) { Display.getDefault().syncExec(new Runnable() { @Override public void run() { try { generateButton.setEnabled(true); } catch (Exception e) { // do nothing } } }); } public void running(IJobChangeEvent event) { // TODO Auto-generated method stub } public void scheduled(IJobChangeEvent event) { // TODO Auto-generated method stub } public void sleeping(IJobChangeEvent event) { // TODO Auto-generated method stub } }); k.schedule(); } protected void contributeButtons(Composite parent) { ((GridLayout) parent.getLayout()).numColumns++; generateButton = new Button(parent, SWT.NONE); generateButton.setFont(parent.getFont()); generateButton.setText(LibHoverMessages.getString(GENERATE)); generateButton.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent evt) { regenerate(); } }); generateButton.addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent event) { generateButton = null; } }); GridData gd = new GridData(); gd.horizontalAlignment = GridData.FILL; int widthHint = convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH); gd.widthHint = Math.max(widthHint, generateButton.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x); generateButton.setLayoutData(gd); } /** * Creates the field editors. Field editors are abstractions of * the common GUI blocks needed to manipulate various types * of preferences. Each field editor knows how to save and * restore itself. */ public void createFieldEditors() { addField(new LabelFieldEditor(getFieldEditorParent(), LibHoverMessages.getString(TITLE))); addField(new DevhelpStringFieldEditor(PreferenceConstants.DEVHELP_DIRECTORY, LibHoverMessages.getString(DEVHELP_DIR), getFieldEditorParent())); // addField( // new GenerateDevHelp( // PreferenceConstants.DUMMY_CONSTANT, // LibHoverMessages.getString(DEVHELP_REGENERATE), // getFieldEditorParent())); } /* (non-Javadoc) * @see org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench) */ public void init(IWorkbench workbench) { } }