Java tutorial
/** Copyright 2010 Christian Kstner This file is part of CIDE. CIDE is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 3 of the License. CIDE is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with CIDE. If not, see <http://www.gnu.org/licenses/>. See http://www.fosd.de/cide/ for further information. */ package de.ovgu.cide.preferences; import java.util.ArrayList; import java.util.HashSet; import java.util.List; import java.util.Set; 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.Label; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; import de.ovgu.cide.CIDECorePlugin; import de.ovgu.cide.features.FeatureModelManager; import de.ovgu.cide.features.FeatureModelProviderProxy; import de.ovgu.cide.languages.LanguageExtensionManager; import de.ovgu.cide.languages.LanguageExtensionProxy; public class PluginPreferencePage extends PreferencePage implements IWorkbenchPreferencePage { private List<LangSelection> langEditors = new ArrayList<LangSelection>(); private Combo featureModelEditor; // private Combo storageProviderEditor; private List<FeatureModelProviderProxy> featureModelProviders; // private List<StorageProviderProxy> storageProviders; private SelectionListener updateListener; public PluginPreferencePage() { // super(GRID); setPreferenceStore(CIDECorePlugin.getDefault().getPreferenceStore()); setDescription("CIDE Languages:"); } private class LangSelection { private Button checkbox; private LanguageExtensionProxy langExtension; LangSelection(LanguageExtensionProxy langExtension, Composite parent) { checkbox = new Button(parent, SWT.CHECK); checkbox.setText(formatLangExt(langExtension)); checkbox.addSelectionListener(updateListener); this.langExtension = langExtension; } public boolean isSelected() { return checkbox.getSelection(); } public String getPrefId() { return PreferenceConstants.P_LANGPREFIX + langExtension.getId(); } public void setSelected(boolean isSelected) { checkbox.setSelection(isSelected); } } private void createLanguagesGroup(Composite parent) { GridData gridData = new GridData(); gridData.grabExcessHorizontalSpace = false; gridData.verticalAlignment = GridData.CENTER; gridData.horizontalAlignment = GridData.BEGINNING; gridData.horizontalSpan = 2; GridLayout gridLayout = new GridLayout(); gridLayout.numColumns = 1; Group languagesGroup = new Group(parent, SWT.NONE); languagesGroup.setText("Supported Languages"); languagesGroup.setLayoutData(gridData); languagesGroup.setLayout(gridLayout); // language extensions List<LanguageExtensionProxy> langExts = LanguageExtensionManager.getInstance().getAllLanguageExtensions(); for (LanguageExtensionProxy langExt : langExts) { LangSelection langSelection = new LangSelection(langExt, languagesGroup); langEditors.add(langSelection); } } @Override protected Control createContents(Composite parent) { updateListener = new SelectionListener() { public void widgetDefaultSelected(SelectionEvent e) { } public void widgetSelected(SelectionEvent e) { update(); } }; GridLayout gridLayout1 = new GridLayout(); gridLayout1.numColumns = 2; parent = new Composite(parent, SWT.NONE); parent.setLayout(gridLayout1); createLanguagesGroup(parent); // feature model featureModelProviders = FeatureModelManager.getInstance().getFeatureModelProviders(); Label featureModelLabel = new Label(parent, SWT.NONE); featureModelLabel.setText("Feature Model Type"); featureModelEditor = new Combo(parent, SWT.READ_ONLY); featureModelEditor.setItems(getFeatureModels(featureModelProviders)); featureModelEditor.addSelectionListener(updateListener); createRestartWarningLabel(parent); // // storage providers // storageProviders = StorageProviderManager.getInstance() // .getStorageProviders(); // Label storageProviderLabel = new Label(parent, SWT.NONE); // storageProviderLabel.setText("Storage Provider"); // storageProviderEditor = new Combo(parent, SWT.READ_ONLY); // storageProviderEditor.setItems(getStorageProviders(storageProviders)); // storageProviderEditor.addSelectionListener(updateListener); load(); validate(); return parent; } private void createRestartWarningLabel(Composite parent) { GridData gridData = new GridData(); gridData.horizontalSpan = 2; Label languagesGroup = new Label(parent, SWT.NONE); languagesGroup.setText("Changing the Feature Model Provider requires a restart of Eclipse."); languagesGroup.setLayoutData(gridData); } private void load() { IPreferenceStore pref = getPreferenceStore(); for (LangSelection lang : langEditors) { lang.setSelected(pref.getBoolean(lang.getPrefId())); } selectFeatureModel(pref.getString(PreferenceConstants.P_FEATUREMODELPROVIDER)); validate(); } private void store() { IPreferenceStore pref = getPreferenceStore(); for (LangSelection lang : langEditors) { pref.setValue(lang.getPrefId(), lang.isSelected()); } int idx = featureModelEditor.getSelectionIndex(); if (idx == -1) pref.setToDefault(PreferenceConstants.P_FEATUREMODELPROVIDER); else pref.setValue(PreferenceConstants.P_FEATUREMODELPROVIDER, featureModelProviders.get(idx).getId()); } @Override protected void performDefaults() { super.performDefaults(); loadDefault(); } @Override public boolean performOk() { store(); return super.performOk(); } private void loadDefault() { IPreferenceStore pref = getPreferenceStore(); for (LangSelection lang : langEditors) { lang.setSelected(pref.getDefaultBoolean(lang.getPrefId())); } selectFeatureModel(pref.getDefaultString(PreferenceConstants.P_FEATUREMODELPROVIDER)); validate(); } private void selectFeatureModel(String featureModelProviderId) { int featureModelProviderIdx = -1; for (int i = 0; i < featureModelProviders.size(); i++) { FeatureModelProviderProxy featureModelProvider = featureModelProviders.get(i); if (featureModelProvider.getId().equals(featureModelProviderId)) featureModelProviderIdx = i; } featureModelEditor.select(featureModelProviderIdx); } protected void update() { validate(); } private boolean validate() { boolean langOverlappingError = false; String overlappingFileExtension = ""; Set<String> supportedFileExtensions = new HashSet<String>(); for (LangSelection langEditor : langEditors) if (!langOverlappingError && langEditor.isSelected()) { for (String fileExtension : langEditor.langExtension.getFileExtensions()) { if (supportedFileExtensions.contains(fileExtension)) { overlappingFileExtension = fileExtension; langOverlappingError = true; } else supportedFileExtensions.add(fileExtension); } } if (langOverlappingError) { return error("Multiple Language Extensions provide facilities for the same language extension " + overlappingFileExtension); } if (featureModelEditor.getSelectionIndex() == -1) return error("No feature model provider selected."); return error(null); } private boolean error(String string) { setErrorMessage(string); setValid(string == null); return string == null; } private String[] getFeatureModels(List<FeatureModelProviderProxy> featureModelProviders) { String[] result = new String[featureModelProviders.size()]; int idx = 0; for (FeatureModelProviderProxy fmp : featureModelProviders) { result[idx] = fmp.getName(); idx++; } return result; } // private String[] getStorageProviders( // List<StorageProviderProxy> storageProviders) { // // String[] result = new String[storageProviders.size()]; // int idx = 0; // for (StorageProviderProxy storageProvider : storageProviders) { // result[idx] = storageProvider.getName(); // idx++; // } // return result; // } private String formatLangExt(LanguageExtensionProxy langExt) { return langExt.getName() + " (" + langExt.printFileExtensions(" ,") + ")"; } // @Override // protected void checkState() { // super.checkState(); // if (!super.isValid()) // return; // // boolean langOverlappingError = false; // String overlappingFileExtension = ""; // Set<String> supportedFileExtensions = new HashSet<String>(); // for (BooleanFieldEditor langEditor : langEditors) // if (!langOverlappingError && langEditor.getBooleanValue()) { // LanguageExtensionProxy lang = LanguageExtensionManager // .getInstance().getLanguageExtension( // langEditor.getPreferenceName()); // for (String fileExtension : lang.getFileExtensions()) { // if (supportedFileExtensions.contains(fileExtension)) { // overlappingFileExtension = fileExtension; // langOverlappingError = true; // } else // supportedFileExtensions.add(fileExtension); // } // } // if (langOverlappingError) { // setErrorMessage("Multiple Language Extensions provide facilities for the same language extension " // + overlappingFileExtension); // setValid(false); // } else { // setErrorMessage(null); // setValid(true); // } // // featureModelEditor.get() // private ComboFieldEditor featureModelEditor; // private ComboFieldEditor storageProviderEditor; // // } // // @Override // public void propertyChange(PropertyChangeEvent event) { // super.propertyChange(event); // if (event.getProperty().equals(FieldEditor.VALUE)) // if (langEditors.contains(event.getSource())) // checkState(); // } /* * (non-Javadoc) * * @see * org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench) */ public void init(IWorkbench workbench) { } }