Java tutorial
/******************************************************************************* * Copyright (c) 2005, 2010 IBM Corporation and others. * 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: * Maik Schreiber - initial API and implementation * Mikael Petterson adaptation. *******************************************************************************/ package net.sourceforge.eclipseccase.ui.preferences; import java.util.*; import net.sourceforge.eclipseccase.IClearCasePreferenceConstants; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.preference.*; import org.eclipse.jface.viewers.*; import org.eclipse.jface.window.Window; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.*; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; import org.eclipse.ui.dialogs.ListSelectionDialog; public class UcmPreferencePage extends PreferencePage implements IWorkbenchPreferencePage { private BooleanFieldEditor useUcm; private StringFieldEditor activityPattern; // private StringFieldEditor activityIdFormatHelpString; private TextAreaFieldEditor activityId; private Text activityPatternText; private Text activityIdHelpTextFormat; private static final int SPAN = 1; /** * Creates a new instance. */ public UcmPreferencePage() { setDescription(PreferenceMessages.getString("UcmPreferences.Description")); //$NON-NLS-1$ // Set the preference store for the preference page. setPreferenceStore(new ClearCasePreferenceStore()); } @Override protected Control createContents(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); composite.setLayoutData(new GridData(GridData.FILL_BOTH)); useUcm = new BooleanFieldEditor(IClearCasePreferenceConstants.USE_UCM, PreferenceMessages.getString("UcmPreferences.UseUcm"), //$NON-NLS-1$ composite); addFieldEditor(useUcm); Group group = new Group(composite, SWT.NULL); GridLayout layout = new GridLayout(); layout.numColumns = 3; group.setLayout(layout); GridData data = new GridData(); data.horizontalAlignment = GridData.FILL; group.setLayoutData(data); group.setText("Activity ID Format:"); TextPair format = createFormatEditorControl(group, PreferenceMessages.getString("UcmPreferences.label.activityForHelpString"), //$NON-NLS-1$ PreferenceMessages.getString("UcmPreferences.button.addVariables"), //$NON-NLS-1$ getActivityIdBindingDescriptions()); activityIdHelpTextFormat = format.t1; createLabel(group, PreferenceMessages.getString("UcmPreferences.label.activityPattern"), SPAN); //$NON-NLS-1$ activityPatternText = new Text(group, SWT.BORDER); activityPatternText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); activityId = new TextAreaFieldEditor(IClearCasePreferenceConstants.ACTIVITY_MSG_FORMAT, PreferenceMessages.getString("UcmPreferences.activityFormatMsg"), composite); addFieldEditor(activityId); initializeValues(); return composite; } public void init(IWorkbench arg0) { // TODO Auto-generated method stub } /** * Initializes values for non-FieldEditors. */ private void initializeValues() { final IPreferenceStore store = getPreferenceStore(); activityPatternText.setText(store.getString(IClearCasePreferenceConstants.ACTIVITY_PATTERN)); activityIdHelpTextFormat .setText(store.getString(IClearCasePreferenceConstants.ACTIVITY_FORMAT_HELP_STRING)); setValid(true); } // Needs to be done for each fieldeditor. private void addFieldEditor(FieldEditor fieldEditor) { fieldEditor.setPreferencePage(this); fieldEditor.setPreferenceStore(getPreferenceStore()); fieldEditor.load(); } @Override protected void performDefaults() { useUcm.loadDefault(); // Since not a FieldEditor activityPatternText .setText(getPreferenceStore().getDefaultString(IClearCasePreferenceConstants.ACTIVITY_PATTERN)); activityIdHelpTextFormat.setText( getPreferenceStore().getDefaultString(IClearCasePreferenceConstants.ACTIVITY_FORMAT_HELP_STRING)); activityId.loadDefault(); super.performDefaults(); } @Override public boolean performOk() { useUcm.store(); // Since not a FieldEditor getPreferenceStore().setValue(IClearCasePreferenceConstants.ACTIVITY_PATTERN, activityPatternText.getText()); getPreferenceStore().setValue(IClearCasePreferenceConstants.ACTIVITY_FORMAT_HELP_STRING, activityIdHelpTextFormat.getText()); activityId.store(); return super.performOk(); } protected TextPair createFormatEditorControl(Composite composite, String title, String buttonText, final Map<String, String> supportedBindings) { createLabel(composite, title, SPAN); Text format = new Text(composite, SWT.BORDER); format.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); format.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { updateExamples(); } }); Button add = new Button(composite, SWT.PUSH); add.setText(buttonText); GridData data = new GridData(); data.horizontalAlignment = GridData.FILL; int widthHint = convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH); data.widthHint = Math.max(widthHint, add.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x); add.setLayoutData(data); final Text formatToInsert = format; add.addListener(SWT.Selection, new Listener() { public void handleEvent(Event event) { addVariables(formatToInsert, supportedBindings); } }); return new TextPair(format, null); } /** * get the map of {variable,description} to use for files with * createFormatEditorControl */ private Map getActivityIdBindingDescriptions() { Map bindings = new HashMap(); bindings.put("stream", "current stream name"); //$NON-NLS-1$ return bindings; } class TextPair { TextPair(Text t1, Text t2) { this.t1 = t1; this.t2 = t2; } Text t1; Text t2; } class StringPair { String s1; String s2; } /** * creates a label */ private Label createLabel(Composite parent, String text, int span) { Label label = new Label(parent, SWT.LEFT); label.setText(text); GridData data = new GridData(); data.horizontalSpan = span; data.horizontalAlignment = GridData.FILL; label.setLayoutData(data); return label; } /** * updates the examples */ protected void updateExamples() { // if (fPreview != null) fPreview.refresh(); } /** * Add another variable to the given target. The variable is inserted at * current position A ListSelectionDialog is shown and the choose the * variables to add */ private void addVariables(Text target, Map<String, String> bindings) { final ArrayList variables = new ArrayList(bindings.size()); ILabelProvider labelProvider = new LabelProvider() { @Override public String getText(Object element) { return ((StringPair) element).s1 + " - " + ((StringPair) element).s2; //$NON-NLS-1$ } }; IStructuredContentProvider contentsProvider = new IStructuredContentProvider() { public Object[] getElements(Object inputElement) { return variables.toArray(new StringPair[variables.size()]); } public void dispose() { } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { } }; for (Iterator it = bindings.keySet().iterator(); it.hasNext();) { StringPair variable = new StringPair(); variable.s1 = (String) it.next(); // variable variable.s2 = bindings.get(variable.s1); // description variables.add(variable); } ListSelectionDialog dialog = new ListSelectionDialog(this.getShell(), this, contentsProvider, labelProvider, "Select variables that will be substituted with runtime values:"); //$NON-NLS-1$ dialog.setTitle("Add Substitution Variables"); //$NON-NLS-1$ if (dialog.open() != Window.OK) return; Object[] result = dialog.getResult(); for (int i = 0; i < result.length; i++) { target.insert("{" + ((StringPair) result[i]).s1 + "}"); //$NON-NLS-1$ //$NON-NLS-2$ } } }