Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2006 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: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.ajdt.internal.ui.dialogs; import java.io.IOException; import java.io.StringReader; import java.io.StringWriter; import org.eclipse.jdt.core.search.IJavaSearchScope; import org.eclipse.jdt.core.search.SearchEngine; import org.eclipse.jdt.core.search.TypeNameMatch; import org.eclipse.jdt.internal.corext.util.Strings; import org.eclipse.jdt.internal.ui.JavaPlugin; import org.eclipse.jdt.internal.ui.JavaPluginImages; import org.eclipse.jdt.internal.ui.JavaUIMessages; import org.eclipse.jdt.internal.ui.dialogs.TextFieldNavigationHandler; import org.eclipse.jdt.internal.ui.search.JavaSearchScopeFactory; import org.eclipse.jdt.internal.ui.util.SWTUtil; import org.eclipse.jdt.internal.ui.util.TypeNameMatchLabelProvider; import org.eclipse.jdt.internal.ui.workingsets.WorkingSetFilterActionGroup; import org.eclipse.jdt.ui.dialogs.ITypeSelectionComponent; import org.eclipse.jdt.ui.dialogs.TypeSelectionExtension; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.IAction; import org.eclipse.jface.action.IMenuManager; import org.eclipse.jface.action.MenuManager; import org.eclipse.jface.dialogs.DialogSettings; import org.eclipse.jface.dialogs.IDialogSettings; import org.eclipse.jface.layout.PixelConverter; import org.eclipse.jface.util.IPropertyChangeListener; import org.eclipse.jface.util.PropertyChangeEvent; import org.eclipse.swt.SWT; import org.eclipse.swt.accessibility.AccessibleAdapter; import org.eclipse.swt.accessibility.AccessibleEvent; import org.eclipse.swt.custom.CLabel; import org.eclipse.swt.custom.ViewForm; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.events.KeyListener; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.events.TraverseEvent; import org.eclipse.swt.events.TraverseListener; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.Text; import org.eclipse.swt.widgets.ToolBar; import org.eclipse.swt.widgets.ToolItem; import org.eclipse.ui.IMemento; import org.eclipse.ui.IWorkingSet; import org.eclipse.ui.WorkbenchException; import org.eclipse.ui.XMLMemento; public class TypeSelectionComponent extends Composite implements ITypeSelectionComponent { private IDialogSettings fSettings; private boolean fMultipleSelection; private ITitleLabel fTitleLabel; private ToolBar fToolBar; private ToolItem fToolItem; private MenuManager fMenuManager; private WorkingSetFilterActionGroup fFilterActionGroup; private TypeSelectionExtension fTypeSelectionExtension; private Text fFilter; private String fInitialFilterText; private IJavaSearchScope fScope; private TypeInfoViewer fViewer; private ViewForm fForm; private CLabel fLabel; public static final int NONE = 0; public static final int CARET_BEGINNING = 1; public static final int FULL_SELECTION = 2; private static final String DIALOG_SETTINGS = "org.eclipse.jdt.internal.ui.dialogs.TypeSelectionComponent"; //$NON-NLS-1$ private static final String SHOW_STATUS_LINE = "show_status_line"; //$NON-NLS-1$ private static final String FULLY_QUALIFY_DUPLICATES = "fully_qualify_duplicates"; //$NON-NLS-1$ private static final String WORKINGS_SET_SETTINGS = "workingset_settings"; //$NON-NLS-1$ private class ToggleStatusLineAction extends Action { public ToggleStatusLineAction() { super(JavaUIMessages.TypeSelectionComponent_show_status_line_label, IAction.AS_CHECK_BOX); } public void run() { if (fForm == null) return; GridData gd = (GridData) fForm.getLayoutData(); boolean checked = isChecked(); gd.exclude = !checked; fForm.setVisible(checked); fSettings.put(SHOW_STATUS_LINE, checked); TypeSelectionComponent.this.layout(); } } private class FullyQualifyDuplicatesAction extends Action { public FullyQualifyDuplicatesAction() { super(JavaUIMessages.TypeSelectionComponent_fully_qualify_duplicates_label, IAction.AS_CHECK_BOX); } public void run() { boolean checked = isChecked(); fViewer.setFullyQualifyDuplicates(checked, true); fSettings.put(FULLY_QUALIFY_DUPLICATES, checked); } } /** * Special interface to access a title lable in * a generic fashion. */ public interface ITitleLabel { /** * Sets the title to the given text * * @param text the title text */ public void setText(String text); } public TypeSelectionComponent(Composite parent, int style, String message, boolean multi, IJavaSearchScope scope, int elementKind, String initialFilter, ITitleLabel titleLabel, TypeSelectionExtension extension) { super(parent, style); setFont(parent.getFont()); fMultipleSelection = multi; fScope = scope; fInitialFilterText = initialFilter; fTitleLabel = titleLabel; fTypeSelectionExtension = extension; IDialogSettings settings = JavaPlugin.getDefault().getDialogSettings(); fSettings = settings.getSection(DIALOG_SETTINGS); if (fSettings == null) { fSettings = new DialogSettings(DIALOG_SETTINGS); settings.addSection(fSettings); } if (fSettings.get(SHOW_STATUS_LINE) == null) { fSettings.put(SHOW_STATUS_LINE, true); } createContent(message, elementKind); } public void triggerSearch() { fViewer.forceSearch(); } public TypeNameMatch[] getSelection() { return fViewer.getSelection(); } public IJavaSearchScope getScope() { return fScope; } private void createContent(final String message, int elementKind) { GridLayout layout = new GridLayout(); layout.numColumns = 2; layout.marginWidth = 0; layout.marginHeight = 0; setLayout(layout); Font font = getFont(); Control header = createHeader(this, font, message); GridData gd = new GridData(GridData.FILL_HORIZONTAL); gd.horizontalSpan = 2; header.setLayoutData(gd); fFilter = new Text(this, SWT.BORDER | SWT.FLAT); fFilter.setFont(font); if (fInitialFilterText != null) { fFilter.setText(fInitialFilterText); } gd = new GridData(GridData.FILL_HORIZONTAL); gd.horizontalSpan = 2; fFilter.setLayoutData(gd); fFilter.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { patternChanged((Text) e.widget); } }); fFilter.addKeyListener(new KeyListener() { public void keyReleased(KeyEvent e) { } public void keyPressed(KeyEvent e) { if (e.keyCode == SWT.ARROW_DOWN) { fViewer.setFocus(); } } }); fFilter.getAccessible().addAccessibleListener(new AccessibleAdapter() { public void getName(AccessibleEvent e) { e.result = Strings.removeMnemonicIndicator(message); } }); TextFieldNavigationHandler.install(fFilter); Label label = new Label(this, SWT.NONE); label.setFont(font); label.setText(JavaUIMessages.TypeSelectionComponent_label); label.addTraverseListener(new TraverseListener() { public void keyTraversed(TraverseEvent e) { if (e.detail == SWT.TRAVERSE_MNEMONIC && e.doit) { e.detail = SWT.TRAVERSE_NONE; fViewer.setFocus(); } } }); label = new Label(this, SWT.RIGHT); label.setFont(font); gd = new GridData(GridData.FILL_HORIZONTAL); label.setLayoutData(gd); fViewer = new TypeInfoViewer(this, fMultipleSelection ? SWT.MULTI : SWT.NONE, label, fScope, elementKind, fInitialFilterText, fTypeSelectionExtension != null ? fTypeSelectionExtension.getFilterExtension() : null, fTypeSelectionExtension != null ? fTypeSelectionExtension.getImageProvider() : null); gd = new GridData(GridData.FILL_BOTH); final Table table = fViewer.getTable(); PixelConverter converter = new PixelConverter(table); gd.widthHint = converter.convertWidthInCharsToPixels(70); gd.heightHint = SWTUtil.getTableHeightHint(table, 10); gd.horizontalSpan = 2; table.setLayoutData(gd); table.getAccessible().addAccessibleListener(new AccessibleAdapter() { public void getName(AccessibleEvent e) { if (table.getSelectionCount() == 0) { e.result = Strings.removeMnemonicIndicator(JavaUIMessages.TypeSelectionComponent_label); } } }); fViewer.setFullyQualifyDuplicates(fSettings.getBoolean(FULLY_QUALIFY_DUPLICATES), false); if (fTypeSelectionExtension != null) { Control addition = fTypeSelectionExtension.createContentArea(this); if (addition != null) { addition.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); } } if (!fMultipleSelection) { fForm = new ViewForm(this, SWT.BORDER | SWT.FLAT); fForm.setFont(font); gd = new GridData(GridData.FILL_HORIZONTAL); gd.horizontalSpan = 2; boolean showStatusLine = fSettings.getBoolean(SHOW_STATUS_LINE); gd.exclude = !showStatusLine; fForm.setVisible(showStatusLine); fForm.setLayoutData(gd); fLabel = new CLabel(fForm, SWT.FLAT); fLabel.setFont(fForm.getFont()); fForm.setContent(fLabel); table.addSelectionListener(new SelectionAdapter() { private TypeNameMatchLabelProvider fLabelProvider = new TypeNameMatchLabelProvider( TypeNameMatchLabelProvider.SHOW_TYPE_CONTAINER_ONLY + TypeNameMatchLabelProvider.SHOW_ROOT_POSTFIX); public void widgetSelected(SelectionEvent event) { TypeNameMatch[] selection = fViewer.getSelection(); if (selection.length != 1) { fLabel.setText(""); //$NON-NLS-1$ fLabel.setImage(null); } else { TypeNameMatch type = selection[0]; fLabel.setText(fViewer.getLabelProvider().getQualificationText(type)); fLabel.setImage(fLabelProvider.getImage(type)); } } }); } addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent event) { disposeComponent(); } }); if (fTypeSelectionExtension != null) { fTypeSelectionExtension.initialize(this); } } public void addSelectionListener(SelectionListener listener) { fViewer.getTable().addSelectionListener(listener); } public void populate(int selectionMode) { if (fInitialFilterText != null) { switch (selectionMode) { case CARET_BEGINNING: fFilter.setSelection(0, 0); break; case FULL_SELECTION: fFilter.setSelection(0, fInitialFilterText.length()); break; } } fFilter.setFocus(); fViewer.startup(); } private void patternChanged(Text text) { fViewer.setSearchPattern(text.getText()); } private Control createHeader(Composite parent, Font font, String message) { Composite header = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(); layout.numColumns = 2; layout.marginWidth = 0; layout.marginHeight = 0; header.setLayout(layout); header.setFont(font); Label label = new Label(header, SWT.NONE); label.setText(message); label.setFont(font); label.addTraverseListener(new TraverseListener() { public void keyTraversed(TraverseEvent e) { if (e.detail == SWT.TRAVERSE_MNEMONIC && e.doit) { e.detail = SWT.TRAVERSE_NONE; fFilter.setFocus(); } } }); GridData gd = new GridData(GridData.FILL_HORIZONTAL); label.setLayoutData(gd); createViewMenu(header); return header; } private void createViewMenu(Composite parent) { fToolBar = new ToolBar(parent, SWT.FLAT); fToolItem = new ToolItem(fToolBar, SWT.PUSH, 0); GridData data = new GridData(); data.horizontalAlignment = GridData.END; fToolBar.setLayoutData(data); fToolItem.setImage(JavaPluginImages.get(JavaPluginImages.IMG_ELCL_VIEW_MENU)); fToolItem.setDisabledImage(JavaPluginImages.get(JavaPluginImages.IMG_DLCL_VIEW_MENU)); fToolItem.setToolTipText(JavaUIMessages.TypeSelectionComponent_menu); fToolItem.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { showViewMenu(); } }); fMenuManager = new MenuManager(); fillViewMenu(fMenuManager); // ICommandService commandService= (ICommandService)PlatformUI.getWorkbench().getAdapter(ICommandService.class); // IHandlerService handlerService= (IHandlerService)PlatformUI.getWorkbench().getAdapter(IHandlerService.class); } private void showViewMenu() { Menu menu = fMenuManager.createContextMenu(getShell()); Rectangle bounds = fToolItem.getBounds(); Point topLeft = new Point(bounds.x, bounds.y + bounds.height); topLeft = fToolBar.toDisplay(topLeft); menu.setLocation(topLeft.x, topLeft.y); menu.setVisible(true); } private void fillViewMenu(IMenuManager viewMenu) { if (!fMultipleSelection) { ToggleStatusLineAction showStatusLineAction = new ToggleStatusLineAction(); showStatusLineAction.setChecked(fSettings.getBoolean(SHOW_STATUS_LINE)); viewMenu.add(showStatusLineAction); } FullyQualifyDuplicatesAction fullyQualifyDuplicatesAction = new FullyQualifyDuplicatesAction(); fullyQualifyDuplicatesAction.setChecked(fSettings.getBoolean(FULLY_QUALIFY_DUPLICATES)); viewMenu.add(fullyQualifyDuplicatesAction); if (fScope == null) { fFilterActionGroup = new WorkingSetFilterActionGroup(getShell(), JavaPlugin.getActivePage(), new IPropertyChangeListener() { public void propertyChange(PropertyChangeEvent event) { IWorkingSet ws = (IWorkingSet) event.getNewValue(); if (ws == null || (ws.isAggregateWorkingSet() && ws.isEmpty())) { fScope = SearchEngine.createWorkspaceScope(); fTitleLabel.setText(null); } else { fScope = JavaSearchScopeFactory.getInstance().createJavaSearchScope(ws, true); fTitleLabel.setText(ws.getLabel()); } fViewer.setSearchScope(fScope, true); } }); String setting = fSettings.get(WORKINGS_SET_SETTINGS); if (setting != null) { try { IMemento memento = XMLMemento.createReadRoot(new StringReader(setting)); fFilterActionGroup.restoreState(memento); } catch (WorkbenchException e) { } } IWorkingSet ws = fFilterActionGroup.getWorkingSet(); if (ws == null || (ws.isAggregateWorkingSet() && ws.isEmpty())) { fScope = SearchEngine.createWorkspaceScope(); fTitleLabel.setText(null); } else { fScope = JavaSearchScopeFactory.getInstance().createJavaSearchScope(ws, true); fTitleLabel.setText(ws.getLabel()); } fFilterActionGroup.fillViewMenu(viewMenu); } } private void disposeComponent() { if (fFilterActionGroup != null) { XMLMemento memento = XMLMemento.createWriteRoot("workingSet"); //$NON-NLS-1$ fFilterActionGroup.saveState(memento); fFilterActionGroup.dispose(); StringWriter writer = new StringWriter(); try { memento.save(writer); fSettings.put(WORKINGS_SET_SETTINGS, writer.getBuffer().toString()); } catch (IOException e) { // don't do anything. Simply don't store the settings } } } }