Java tutorial
/******************************************************************************* * Copyright (c) 2007-2013 Red Hat, Inc. * Distributed under license by Red Hat, Inc. All rights reserved. * This program is 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 * * Contributor: * Red Hat, Inc. - initial API and implementation ******************************************************************************/ package org.jboss.tools.browsersim.eclipse.preferences; import java.text.MessageFormat; import java.util.List; import org.eclipse.jdt.launching.IVMInstall; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.preference.PreferencePage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Widget; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; import org.eclipse.ui.dialogs.PreferenceLinkArea; import org.eclipse.ui.preferences.IWorkbenchPreferenceContainer; import org.jboss.tools.browsersim.browser.PlatformUtil; import org.jboss.tools.browsersim.eclipse.Activator; import org.jboss.tools.browsersim.eclipse.Messages; /** * @author Konstantin Marmalyukov (kmarmaliykov) */ public class BrowserSimPreferencesPage extends PreferencePage implements IWorkbenchPreferencePage { public static final String BROWSERSIM_JVM_ID = "org.jboss.tools.browsersim.jvm"; //$NON-NLS-1$ public static final String BROWSERSIM_JVM_AUTOMATICALLY = "org.jboss.tools.browsersim.jvm.automatically"; //$NON-NLS-1$ public static final String BROWSERSIM_GTK_2 = "org.jboss.tools.browsersim.gtk2"; //$NON-NLS-1$ private Combo combo; private Button automatically; private Button select; private Button gtk2; private Button gtk3; private List<IVMInstall> jvms; private SelectionListener radioListener; @Override public void init(IWorkbench workbench) { setPreferenceStore(Activator.getDefault().getPreferenceStore()); jvms = PreferencesUtil.getSuitableJvms(); } @Override protected Control createContents(Composite parent) { initializeDialogUnits(parent); int nColumns = 2; Composite result = new Composite(parent, SWT.NONE); result.setFont(parent.getFont()); GridLayout layout = new GridLayout(); layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN); layout.marginWidth = 0; layout.numColumns = nColumns; result.setLayout(layout); PreferenceLinkArea contentTypeArea = new PreferenceLinkArea(result, SWT.NONE, "org.eclipse.jdt.debug.ui.preferences.VMPreferencePage", //$NON-NLS-1$ Messages.BrowserSimPreferencesPage_JRE_LINK, (IWorkbenchPreferenceContainer) getContainer(), null); GridData data = new GridData(); data.horizontalSpan = 2; contentTypeArea.getControl().setLayoutData(data); contentTypeArea.getControl().setFont(parent.getFont()); Group jreGroup = new Group(result, SWT.NONE); GridLayout jreGroupLayout = new GridLayout(); jreGroupLayout.numColumns = 3; jreGroup.setLayout(jreGroupLayout); GridData jreGroupLayoutData = new GridData(GridData.FILL_HORIZONTAL); jreGroupLayoutData.horizontalSpan = 2; jreGroup.setLayoutData(jreGroupLayoutData); jreGroup.setText(Messages.BrowserSimPreferencesPage_SELECT_JRE); radioListener = new SelectionListener() { @Override public void widgetSelected(SelectionEvent e) { controlChanged(e.widget); } @Override public void widgetDefaultSelected(SelectionEvent e) { } }; automatically = addRadioButton(jreGroup, Messages.BrowserSimPreferencesPage_DETECT_AUTOMATICALLY, BROWSERSIM_JVM_AUTOMATICALLY, IPreferenceStore.TRUE, 0); automatically.addSelectionListener(radioListener); select = addRadioButton(jreGroup, Messages.BrowserSimPreferencesPage_SELECT, BROWSERSIM_JVM_AUTOMATICALLY, IPreferenceStore.FALSE, 0); select.addSelectionListener(radioListener); combo = new Combo(jreGroup, SWT.READ_ONLY); for (int i = 0; i < jvms.size(); i++) { combo.add(jvms.get(i).getName(), i); } combo.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); fillValues(); if (PlatformUtil.OS_LINUX.equals(PlatformUtil.getOs())) { addGtkGroup(result); } Dialog.applyDialogFont(result); return result; } private void addGtkGroup(Composite result) { Group gtkGroup = new Group(result, SWT.NONE); GridLayout gtkGroupLayout = new GridLayout(); gtkGroupLayout.numColumns = 2; gtkGroup.setLayout(gtkGroupLayout); GridData gtkGridData = new GridData(GridData.FILL_HORIZONTAL); gtkGroup.setLayoutData(gtkGridData); gtkGroup.setText(Messages.BrowserSimPreferencesPage_SELECT_GTK); gtk2 = addRadioButton(gtkGroup, Messages.BrowserSimPreferencesPage_GTK_2, BROWSERSIM_GTK_2, IPreferenceStore.TRUE, 0); gtk3 = addRadioButton(gtkGroup, Messages.BrowserSimPreferencesPage_GTK_3, BROWSERSIM_GTK_2, IPreferenceStore.FALSE, 0); setGtkValues(); } private void setGtkValues() { if (IPreferenceStore.TRUE.equals(getPreferenceStore().getString(BROWSERSIM_GTK_2))) { gtk2.setSelection(true); } else { gtk3.setSelection(true); } } private Button addRadioButton(Composite parent, String label, String key, String value, int indent) { GridData gd = new GridData(); gd.horizontalSpan = 2; gd.horizontalIndent = indent; Button button = new Button(parent, SWT.RADIO); button.setText(label); button.setData(new String[] { key, value }); button.setLayoutData(gd); return button; } private void fillValues() { if (jvms.isEmpty()) { /* * browserSim can be executed only on 32bit jvm on windows, that's why jvm list can be empty. * @see https://issues.jboss.org/browse/JBIDE-13988 */ String message; boolean is32bitEclipse = PlatformUtil.ARCH_X86.equals(PlatformUtil.getArch()); message = MessageFormat.format(Messages.BrowserSimPreferencesPage_REQUIREMENTS, is32bitEclipse ? "32-bit" : "64-bit"); //$NON-NLS-1$ //$NON-NLS-2$ setMessage(message, IMessageProvider.ERROR); automatically.setSelection(true); select.setEnabled(false); combo.setEnabled(false); } else { int selectionIndex = -1; if (IPreferenceStore.FALSE.equals(getPreferenceStore().getString(BROWSERSIM_JVM_AUTOMATICALLY))) { String selectedID = getPreferenceStore().getString(BROWSERSIM_JVM_ID); for (int i = 0; i < jvms.size(); i++) { if (selectedID.equals(jvms.get(i).getId())) { selectionIndex = i; break; } } select.setSelection(true); controlChanged(select); } else { automatically.setSelection(true); controlChanged(automatically); } automatically.setText(automatically.getText() + " (" + jvms.get(0).getName() + ")"); //$NON-NLS-1$ //$NON-NLS-2$ combo.select(selectionIndex); } } private void controlChanged(Widget widget) { if (select.equals(widget)) { combo.setEnabled(true); if (combo.getSelectionIndex() == -1) { combo.select(0); } } else { combo.setEnabled(false); } } @Override public boolean performOk() { IPreferenceStore store = getPreferenceStore(); if (PlatformUtil.OS_LINUX.equals(PlatformUtil.getOs())) { if (gtk2.getSelection()) { store.setValue(BROWSERSIM_GTK_2, IPreferenceStore.TRUE); } else { store.setValue(BROWSERSIM_GTK_2, IPreferenceStore.FALSE); } } if (automatically.getSelection()) { store.setValue(BROWSERSIM_JVM_AUTOMATICALLY, IPreferenceStore.TRUE); } else { store.setValue(BROWSERSIM_JVM_AUTOMATICALLY, IPreferenceStore.FALSE); String value = jvms.get(combo.getSelectionIndex()).getId(); // check that this jvm was not deleted from Installed JRE's page before saving boolean exists = false; for (IVMInstall vm : PreferencesUtil.getSuitableJvms()) { if (value.equals(vm.getId())) { exists = true; break; } } if (exists) { store.setValue(BROWSERSIM_JVM_ID, value); } else { // if selected jvm is deleted from Installed JRE's page, any suitable jvm will use store.setValue(BROWSERSIM_JVM_AUTOMATICALLY, IPreferenceStore.TRUE); } } return true; } @Override protected void performDefaults() { automatically.setSelection(true); select.setSelection(false); if (PlatformUtil.OS_LINUX.equals(PlatformUtil.getOs())) { gtk2.setSelection(true); gtk3.setSelection(false); } controlChanged(automatically); super.performDefaults(); } }