| /******************************************************************************* |
| * Copyright (c) 2000, 2017 IBM Corporation and others. |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.dltk.internal.testing.util; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.dltk.internal.testing.wizards.WizardMessages; |
| import org.eclipse.dltk.testing.DLTKTestingPlugin; |
| import org.eclipse.jface.dialogs.IDialogConstants; |
| import org.eclipse.jface.viewers.CheckboxTableViewer; |
| import org.eclipse.jface.viewers.ILabelProvider; |
| import org.eclipse.jface.viewers.IStructuredContentProvider; |
| import org.eclipse.jface.viewers.ViewerFilter; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.custom.BusyIndicator; |
| import org.eclipse.swt.events.SelectionAdapter; |
| 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.Composite; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Label; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.Table; |
| import org.eclipse.ui.dialogs.ISelectionStatusValidator; |
| import org.eclipse.ui.dialogs.SelectionStatusDialog; |
| |
| /** |
| * A dialog with checked table viewer. |
| */ |
| public class CheckedTableSelectionDialog extends SelectionStatusDialog { |
| |
| private CheckboxTableViewer fViewer; |
| |
| private ILabelProvider fLabelProvider; |
| private IStructuredContentProvider fContentProvider; |
| |
| private ISelectionStatusValidator fValidator = null; |
| private String fEmptyListMessage = WizardMessages.CheckedTableSelectionDialog_emptyListMessage; |
| |
| private IStatus fCurrStatus = Status.OK_STATUS; |
| private List<ViewerFilter> fFilters; |
| private Object fInput; |
| private boolean fIsEmpty; |
| |
| private int fWidth = 40; |
| private int fHeight = 18; |
| |
| /** |
| * Constructs an instance of <code>ElementTreeSelectionDialog</code>. |
| * |
| * @param labelProvider |
| * the label provider to render the entries |
| * @param contentProvider |
| * the content provider to evaluate the tree structure |
| */ |
| public CheckedTableSelectionDialog(Shell parent, |
| ILabelProvider labelProvider, |
| IStructuredContentProvider contentProvider) { |
| super(parent); |
| |
| fLabelProvider = labelProvider; |
| fContentProvider = contentProvider; |
| |
| setResult(new ArrayList(0)); |
| setStatusLineAboveButtons(true); |
| } |
| |
| /** |
| * Sets the initial selection. Convenience method. |
| * |
| * @param selection |
| * the initial selection. |
| */ |
| public void setInitialSelection(Object selection) { |
| setInitialSelections(new Object[] { selection }); |
| } |
| |
| /** |
| * Sets the message to be displayed if the list is empty. |
| * |
| * @param message |
| * the message to be displayed. |
| */ |
| public void setEmptyListMessage(String message) { |
| fEmptyListMessage = message; |
| } |
| |
| /** |
| * Adds a filter to the tree viewer. |
| * |
| * @param filter |
| * a filter. |
| */ |
| public void addFilter(ViewerFilter filter) { |
| if (fFilters == null) |
| fFilters = new ArrayList<>(4); |
| |
| fFilters.add(filter); |
| } |
| |
| /** |
| * Sets an optional validator to check if the selection is valid. The |
| * validator is invoked whenever the selection changes. |
| * |
| * @param validator |
| * the validator to validate the selection. |
| */ |
| public void setValidator(ISelectionStatusValidator validator) { |
| fValidator = validator; |
| } |
| |
| /** |
| * Sets the tree input. |
| * |
| * @param input |
| * the tree input. |
| */ |
| public void setInput(Object input) { |
| fInput = input; |
| } |
| |
| /** |
| * Sets the size of the tree in unit of characters. |
| * |
| * @param width |
| * the width of the tree. |
| * @param height |
| * the height of the tree. |
| */ |
| public void setSize(int width, int height) { |
| fWidth = width; |
| fHeight = height; |
| } |
| |
| protected void updateOKStatus() { |
| if (!fIsEmpty) { |
| if (fValidator != null) { |
| fCurrStatus = fValidator.validate(fViewer.getCheckedElements()); |
| updateStatus(fCurrStatus); |
| } else if (!fCurrStatus.isOK()) { |
| fCurrStatus = Status.CANCEL_STATUS; |
| } |
| } else { |
| fCurrStatus = new Status(IStatus.ERROR, DLTKTestingPlugin.PLUGIN_ID, |
| fEmptyListMessage, null); |
| } |
| updateStatus(fCurrStatus); |
| } |
| |
| @Override |
| public int open() { |
| fIsEmpty = evaluateIfTableEmpty(fInput); |
| BusyIndicator.showWhile(null, () -> access$superOpen()); |
| return getReturnCode(); |
| } |
| |
| private void access$superOpen() { |
| super.open(); |
| } |
| |
| /** |
| * Handles cancel button pressed event. |
| */ |
| @Override |
| protected void cancelPressed() { |
| setResult(null); |
| super.cancelPressed(); |
| } |
| |
| @Override |
| protected void computeResult() { |
| setResult(Arrays.asList(fViewer.getCheckedElements())); |
| } |
| |
| @Override |
| public void create() { |
| super.create(); |
| |
| List initialSelections = getInitialElementSelections(); |
| if (initialSelections.size() > 0) { |
| fViewer.setCheckedElements(initialSelections.toArray()); |
| } |
| |
| updateOKStatus(); |
| } |
| |
| @Override |
| protected Control createDialogArea(Composite parent) { |
| Composite composite = (Composite) super.createDialogArea(parent); |
| |
| Label messageLabel = createMessageArea(composite); |
| Control treeWidget = createTableViewer(composite); |
| Control buttonComposite = createSelectionButtons(composite); |
| |
| GridData data = new GridData(GridData.FILL_BOTH); |
| data.widthHint = convertWidthInCharsToPixels(fWidth); |
| data.heightHint = convertHeightInCharsToPixels(fHeight); |
| treeWidget.setLayoutData(data); |
| |
| if (fIsEmpty) { |
| messageLabel.setEnabled(false); |
| treeWidget.setEnabled(false); |
| buttonComposite.setEnabled(false); |
| } |
| applyDialogFont(composite); |
| return composite; |
| } |
| |
| private Table createTableViewer(Composite parent) { |
| fViewer = CheckboxTableViewer.newCheckList(parent, SWT.BORDER); |
| |
| fViewer.setContentProvider(fContentProvider); |
| fViewer.setLabelProvider(fLabelProvider); |
| fViewer.addCheckStateListener(event -> updateOKStatus()); |
| |
| if (fFilters != null) { |
| for (int i = 0; i != fFilters.size(); i++) |
| fViewer.addFilter(fFilters.get(i)); |
| } |
| |
| fViewer.setInput(fInput); |
| return fViewer.getTable(); |
| } |
| |
| /** |
| * Add the selection and deselection buttons to the dialog. |
| * |
| * @param composite |
| * org.eclipse.swt.widgets.Composite |
| */ |
| private Composite createSelectionButtons(Composite composite) { |
| Composite buttonComposite = new Composite(composite, SWT.RIGHT); |
| GridLayout layout = new GridLayout(); |
| layout.numColumns = 2; |
| buttonComposite.setLayout(layout); |
| GridData data = new GridData( |
| GridData.HORIZONTAL_ALIGN_END | GridData.GRAB_HORIZONTAL); |
| data.grabExcessHorizontalSpace = true; |
| composite.setData(data); |
| |
| Button selectButton = createButton(buttonComposite, |
| IDialogConstants.SELECT_ALL_ID, |
| WizardMessages.CheckedTableSelectionDialog_selectAll, false); |
| |
| SelectionListener listener = new SelectionAdapter() { |
| @Override |
| public void widgetSelected(SelectionEvent e) { |
| fViewer.setCheckedElements( |
| fContentProvider.getElements(fInput)); |
| updateOKStatus(); |
| } |
| }; |
| selectButton.addSelectionListener(listener); |
| |
| Button deselectButton = createButton(buttonComposite, |
| IDialogConstants.DESELECT_ALL_ID, |
| WizardMessages.CheckedTableSelectionDialog_deselectAll, false); |
| |
| listener = new SelectionAdapter() { |
| @Override |
| public void widgetSelected(SelectionEvent e) { |
| fViewer.setCheckedElements(new Object[0]); |
| updateOKStatus(); |
| } |
| }; |
| deselectButton.addSelectionListener(listener); |
| return buttonComposite; |
| } |
| |
| private boolean evaluateIfTableEmpty(Object input) { |
| Object[] elements = fContentProvider.getElements(input); |
| if (elements.length > 0) { |
| if (fFilters != null) { |
| for (int i = 0; i < fFilters.size(); i++) { |
| ViewerFilter curr = fFilters.get(i); |
| elements = curr.filter(fViewer, input, elements); |
| } |
| } |
| } |
| return elements.length == 0; |
| } |
| } |