Java tutorial
/* * Copyright (c) 2014, the Dart project authors. * * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.eclipse.org/legal/epl-v10.html * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package com.google.dart.tools.ui.internal.preferences; import com.google.dart.tools.core.DartCore; import com.google.dart.tools.core.DartCoreDebug; import com.google.dart.tools.ui.DartToolsPlugin; import com.google.dart.tools.ui.themes.Fonts; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.preferences.IEclipsePreferences; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; 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.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; /** * Page for setting Hint Analysis preferences. */ public class ExperimentalPreferencePage extends PreferencePage implements IWorkbenchPreferencePage { public static final String EXPERIMENTAL_PREF_PAGE_ID = "com.google.dart.tools.ui.preferences.ExperimentalPreferencePage"; //$NON-NLS-1$ private static Button createCheckBox(Composite composite, String label, String tooltip) { Button checkBox = new Button(composite, SWT.CHECK); checkBox.setText(label); checkBox.setToolTipText(tooltip); return checkBox; } private Button enableAnalysisServerButton; private Label serverHttpPortLabel; private Text serverHttpPortText; private Button serverUsageButton; public ExperimentalPreferencePage() { setPreferenceStore(null); noDefaultAndApplyButton(); } @Override public void init(IWorkbench workbench) { // do nothing } @Override public boolean performOk() { IEclipsePreferences prefs = DartCore.getPlugin().getPrefs(); if (prefs != null) { boolean serverChanged = setPrefBool(DartCoreDebug.ENABLE_ANALYSIS_SERVER_PREF, true, enableAnalysisServerButton); boolean portChanged = setPref(DartCoreDebug.ANALYSIS_SERVER_HTTP_PORT_PREF, serverHttpPortText); // Formatter changes don't require restart. boolean hasChanges = serverChanged || portChanged; boolean analyticsOptionChanged = false; if (DartCoreDebug.ASK_FOR_USER_ANALYTICS) { analyticsOptionChanged = serverUsageButton.getSelection() != DartCore.getPlugin() .getEnableAnalytics() ? true : false; DartCore.getPlugin().setEnableAnalytics(serverUsageButton.getSelection()); } try { DartCore.getPlugin().savePrefs(); } catch (CoreException e) { DartToolsPlugin.log(e); } if (hasChanges || analyticsOptionChanged) { MessageDialog.openInformation(getShell(), "Restart Required", "These changes will only take effect once the IDE has been restarted."); } } return true; } @Override protected Control createContents(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); GridDataFactory.fillDefaults().grab(true, false).indent(0, 10).align(SWT.FILL, SWT.BEGINNING) .applyTo(composite); GridLayoutFactory.fillDefaults().spacing(0, 8).margins(0, 10).applyTo(composite); // Enable Analysis Server checkbox enableAnalysisServerButton = createCheckBox(composite, PreferencesMessages.ExperimentalPreferencePage_enable_analysis_server, PreferencesMessages.ExperimentalPreferencePage_enable_analysis_server_tooltip); GridDataFactory.fillDefaults().applyTo(enableAnalysisServerButton); enableAnalysisServerButton.addSelectionListener(new SelectionListener() { @Override public void widgetDefaultSelected(SelectionEvent e) { widgetSelected(e); } @Override public void widgetSelected(SelectionEvent e) { updateServerOptionEnablement(); } }); // Analysis Server options { Composite group = new Composite(composite, SWT.NONE); GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.BEGINNING).applyTo(group); GridLayoutFactory.fillDefaults().numColumns(2).extendedMargins(40, 0, 0, 0).applyTo(group); serverHttpPortLabel = new Label(group, SWT.NONE); serverHttpPortLabel.setText(PreferencesMessages.ExperimentalPreferencePage_server_http_port_label); // Http port for analysis server or empty string if none serverHttpPortText = new Text(group, SWT.BORDER | SWT.SINGLE | SWT.RIGHT); serverHttpPortText.setTextLimit(5); serverHttpPortText .setToolTipText(PreferencesMessages.ExperimentalPreferencePage_server_http_port_tooltip); GridDataFactory.fillDefaults().hint(50, SWT.DEFAULT).applyTo(serverHttpPortText); // Only allow integer values serverHttpPortText.addListener(SWT.Verify, new ValidIntListener()); } // Separator { Label separatorLabel = new Label(composite, SWT.NONE); GridDataFactory.fillDefaults().grab(true, false).applyTo(separatorLabel); } if (DartCoreDebug.ASK_FOR_USER_ANALYTICS) { { Composite group = new Composite(composite, SWT.NONE); GridData data = new GridData(SWT.FILL, SWT.BEGINNING, true, false); data.widthHint = composite.computeSize(SWT.DEFAULT, SWT.DEFAULT).x; group.setLayoutData(data); //GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.BEGINNING).applyTo(group); GridLayoutFactory.fillDefaults().applyTo(group); serverUsageButton = createCheckBox(group, "Send usage statistics to Google Inc.", "Send usage statistics to Google Inc."); GridDataFactory.fillDefaults().applyTo(serverUsageButton); Label usageNotes = new Label(group, SWT.WRAP); usageNotes.setText(PreferencesMessages.ExperimentalPreferencePage_usage_notes); usageNotes.setFont(Fonts.getItalicFont(usageNotes.getFont())); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.TOP).grab(true, false).applyTo(usageNotes); } // Separator { Label separatorLabel = new Label(composite, SWT.NONE); GridDataFactory.fillDefaults().grab(true, false).applyTo(separatorLabel); } } Label notes = new Label(composite, SWT.NONE); notes.setText(PreferencesMessages.ExperimentalPreferencePage_notes); GridDataFactory.fillDefaults().grab(false, true).applyTo(notes); // init initFromPrefs(); return composite; } private String getPref(String prefKey) { return DartCore.getPlugin().getPrefs().get(prefKey, "").trim(); } private boolean getPrefBool(String prefKey, boolean def) { return DartCore.getPlugin().getPrefs().getBoolean(prefKey, def); } private void initFromPrefs() { enableAnalysisServerButton.setSelection(getPrefBool(DartCoreDebug.ENABLE_ANALYSIS_SERVER_PREF, true)); String textValue = getPref(DartCoreDebug.ANALYSIS_SERVER_HTTP_PORT_PREF); try { if (Integer.parseInt(textValue) < 0) { textValue = ""; } } catch (NumberFormatException nfe) { textValue = ""; } serverHttpPortText.setText(textValue); updateServerOptionEnablement(); if (DartCoreDebug.ASK_FOR_USER_ANALYTICS) { serverUsageButton.setSelection(DartCore.getPlugin().getEnableAnalytics()); } } private boolean setPref(String prefKey, Text textBox) { String oldValue = getPref(prefKey); String newValue = textBox.getText().trim(); DartCore.getPlugin().getPrefs().put(prefKey, newValue); return !oldValue.equals(newValue); } private boolean setPrefBool(String prefKey, boolean def, Button button) { boolean oldValue = getPrefBool(prefKey, def); boolean newValue = button.getSelection(); DartCore.getPlugin().getPrefs().putBoolean(prefKey, newValue); return oldValue != newValue; } private void updateServerOptionEnablement() { boolean enabled = enableAnalysisServerButton.getSelection(); serverHttpPortLabel .setForeground(getShell().getDisplay().getSystemColor(enabled ? SWT.COLOR_BLACK : SWT.COLOR_GRAY)); serverHttpPortText.setEnabled(enabled); } }