| /******************************************************************************* |
| * 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 |
| * |
| *******************************************************************************/ |
| package org.eclipse.dltk.internal.ui.wizards.dialogfields; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.dltk.internal.ui.util.SWTUtil; |
| import org.eclipse.dltk.ui.util.PixelConverter; |
| import org.eclipse.jface.viewers.DoubleClickEvent; |
| import org.eclipse.jface.viewers.IDoubleClickListener; |
| import org.eclipse.jface.viewers.ILabelProvider; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.ISelectionChangedListener; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.ITreeContentProvider; |
| import org.eclipse.jface.viewers.SelectionChangedEvent; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.jface.viewers.ViewerComparator; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.KeyAdapter; |
| import org.eclipse.swt.events.KeyEvent; |
| 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.Display; |
| import org.eclipse.swt.widgets.Label; |
| import org.eclipse.swt.widgets.Tree; |
| |
| /** |
| * A list with a button bar. Typical buttons are 'Add', 'Remove', 'Up' and |
| * 'Down'. List model is independent of widget creation. DialogFields controls |
| * are: Label, List and Composite containing buttons. |
| */ |
| public class TreeListDialogField extends DialogField { |
| |
| protected TreeViewer fTree; |
| protected ILabelProvider fLabelProvider; |
| protected TreeViewerAdapter fTreeViewerAdapter; |
| protected List fElements; |
| protected ViewerComparator fViewerSorter; |
| |
| protected String[] fButtonLabels; |
| private Button[] fButtonControls; |
| |
| private boolean[] fButtonsEnabled; |
| |
| private int fRemoveButtonIndex; |
| private int fUpButtonIndex; |
| private int fDownButtonIndex; |
| |
| private Label fLastSeparator; |
| |
| private Tree fTreeControl; |
| private Composite fButtonsControl; |
| private ISelection fSelectionWhenEnabled; |
| |
| private ITreeListAdapter fTreeAdapter; |
| |
| private Object fParentElement; |
| private int fTreeExpandLevel; |
| |
| /** |
| * @param adapter |
| * Can be <code>null</code>. |
| */ |
| public TreeListDialogField(ITreeListAdapter adapter, String[] buttonLabels, |
| ILabelProvider lprovider) { |
| super(); |
| fTreeAdapter = adapter; |
| |
| fLabelProvider = lprovider; |
| fTreeViewerAdapter = new TreeViewerAdapter(); |
| fParentElement = this; |
| |
| fElements = new ArrayList(10); |
| |
| fButtonLabels = buttonLabels; |
| if (fButtonLabels != null) { |
| int nButtons = fButtonLabels.length; |
| fButtonsEnabled = new boolean[nButtons]; |
| for (int i = 0; i < nButtons; i++) { |
| fButtonsEnabled[i] = true; |
| } |
| } |
| |
| fTree = null; |
| fTreeControl = null; |
| fButtonsControl = null; |
| |
| fRemoveButtonIndex = -1; |
| fUpButtonIndex = -1; |
| fDownButtonIndex = -1; |
| |
| fTreeExpandLevel = 0; |
| } |
| |
| /** |
| * Sets the index of the 'remove' button in the button label array passed in |
| * the constructor. The behavior of the button marked as the 'remove' button |
| * will then be handled internally. (enable state, button invocation |
| * behavior) |
| */ |
| public void setRemoveButtonIndex(int removeButtonIndex) { |
| fRemoveButtonIndex = removeButtonIndex; |
| } |
| |
| /** |
| * Sets the index of the 'up' button in the button label array passed in the |
| * constructor. The behavior of the button marked as the 'up' button will |
| * then be handled internally. (enable state, button invocation behavior) |
| */ |
| public void setUpButtonIndex(int upButtonIndex) { |
| fUpButtonIndex = upButtonIndex; |
| } |
| |
| /** |
| * Sets the index of the 'down' button in the button label array passed in |
| * the constructor. The behavior of the button marked as the 'down' button |
| * will then be handled internally. (enable state, button invocation |
| * behavior) |
| */ |
| public void setDownButtonIndex(int downButtonIndex) { |
| fDownButtonIndex = downButtonIndex; |
| } |
| |
| public void setViewerComparator(ViewerComparator viewerComparator) { |
| fViewerSorter = viewerComparator; |
| } |
| |
| public void setTreeExpansionLevel(int level) { |
| fTreeExpandLevel = level; |
| if (isOkToUse(fTreeControl) && fTreeExpandLevel > 0) { |
| fTree.expandToLevel(level); |
| } |
| } |
| |
| // ------ adapter communication |
| |
| private void buttonPressed(int index) { |
| if (!managedButtonPressed(index) && fTreeAdapter != null) { |
| fTreeAdapter.customButtonPressed(this, index); |
| } |
| } |
| |
| /** |
| * Checks if the button pressed is handled internally |
| * |
| * @return Returns true if button has been handled. |
| */ |
| protected boolean managedButtonPressed(int index) { |
| if (index == fRemoveButtonIndex) { |
| remove(); |
| } else if (index == fUpButtonIndex) { |
| up(); |
| } else if (index == fDownButtonIndex) { |
| down(); |
| } else { |
| return false; |
| } |
| return true; |
| } |
| |
| // ------ layout helpers |
| |
| /* |
| * @see DialogField#doFillIntoGrid |
| */ |
| @Override |
| public Control[] doFillIntoGrid(Composite parent, int nColumns) { |
| PixelConverter converter = new PixelConverter(parent); |
| |
| assertEnoughColumns(nColumns); |
| |
| Label label = getLabelControl(parent); |
| GridData gd = gridDataForLabel(1); |
| gd.verticalAlignment = GridData.BEGINNING; |
| label.setLayoutData(gd); |
| |
| Control list = getTreeControl(parent); |
| gd = new GridData(); |
| gd.horizontalAlignment = GridData.FILL; |
| gd.grabExcessHorizontalSpace = false; |
| gd.verticalAlignment = GridData.FILL; |
| gd.grabExcessVerticalSpace = true; |
| gd.horizontalSpan = nColumns - 2; |
| gd.widthHint = converter.convertWidthInCharsToPixels(50); |
| gd.heightHint = converter.convertHeightInCharsToPixels(6); |
| |
| list.setLayoutData(gd); |
| |
| Composite buttons = getButtonBox(parent); |
| gd = new GridData(); |
| gd.horizontalAlignment = GridData.FILL; |
| gd.grabExcessHorizontalSpace = false; |
| gd.verticalAlignment = GridData.FILL; |
| gd.grabExcessVerticalSpace = true; |
| gd.horizontalSpan = 1; |
| buttons.setLayoutData(gd); |
| |
| return new Control[] { label, list, buttons }; |
| } |
| |
| /* |
| * @see DialogField#getNumberOfControls |
| */ |
| @Override |
| public int getNumberOfControls() { |
| return 3; |
| } |
| |
| /** |
| * Sets the minimal width of the buttons. Must be called after widget |
| * creation. |
| */ |
| public void setButtonsMinWidth(int minWidth) { |
| if (fLastSeparator != null) { |
| ((GridData) fLastSeparator.getLayoutData()).widthHint = minWidth; |
| } |
| } |
| |
| // ------ UI creation |
| |
| /** |
| * Returns the tree control. When called the first time, the control will be |
| * created. |
| * |
| * @param parent |
| * The parent composite when called the first time, or |
| * <code>null</code> after. |
| */ |
| public Control getTreeControl(Composite parent) { |
| if (fTreeControl == null) { |
| assertCompositeNotNull(parent); |
| |
| fTree = createTreeViewer(parent); |
| |
| fTreeControl = (Tree) fTree.getControl(); |
| fTreeControl.addKeyListener(new KeyAdapter() { |
| @Override |
| public void keyPressed(KeyEvent e) { |
| handleKeyPressed(e); |
| } |
| }); |
| fTree.setContentProvider(fTreeViewerAdapter); |
| fTree.setLabelProvider(fLabelProvider); |
| fTree.addSelectionChangedListener(fTreeViewerAdapter); |
| fTree.addDoubleClickListener(fTreeViewerAdapter); |
| |
| fTree.setInput(fParentElement); |
| fTree.expandToLevel(fTreeExpandLevel); |
| |
| if (fViewerSorter != null) { |
| fTree.setComparator(fViewerSorter); |
| } |
| |
| fTreeControl.setEnabled(isEnabled()); |
| if (fSelectionWhenEnabled != null) { |
| postSetSelection(fSelectionWhenEnabled); |
| } |
| } |
| return fTreeControl; |
| } |
| |
| /** |
| * Returns the internally used table viewer. |
| */ |
| public TreeViewer getTreeViewer() { |
| return fTree; |
| } |
| |
| /* |
| * Subclasses may override to specify a different style. |
| */ |
| protected int getTreeStyle() { |
| int style = SWT.BORDER | SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL; |
| return style; |
| } |
| |
| protected TreeViewer createTreeViewer(Composite parent) { |
| Tree tree = new Tree(parent, getTreeStyle()); |
| tree.setFont(parent.getFont()); |
| return new TreeViewer(tree); |
| } |
| |
| protected Button createButton(Composite parent, String label, |
| SelectionListener listener) { |
| Button button = new Button(parent, SWT.PUSH); |
| button.setFont(parent.getFont()); |
| button.setText(label); |
| button.addSelectionListener(listener); |
| GridData gd = new GridData(); |
| gd.horizontalAlignment = GridData.FILL; |
| gd.grabExcessHorizontalSpace = true; |
| gd.verticalAlignment = GridData.BEGINNING; |
| gd.widthHint = SWTUtil.getButtonWidthHint(button); |
| |
| button.setLayoutData(gd); |
| return button; |
| } |
| |
| private Label createSeparator(Composite parent) { |
| Label separator = new Label(parent, SWT.NONE); |
| separator.setFont(parent.getFont()); |
| separator.setVisible(false); |
| GridData gd = new GridData(); |
| gd.horizontalAlignment = GridData.FILL; |
| gd.verticalAlignment = GridData.BEGINNING; |
| gd.heightHint = 4; |
| separator.setLayoutData(gd); |
| return separator; |
| } |
| |
| /** |
| * Returns the composite containing the buttons. When called the first time, |
| * the control will be created. |
| * |
| * @param parent |
| * The parent composite when called the first time, or |
| * <code>null</code> after. |
| */ |
| public Composite getButtonBox(Composite parent) { |
| if (fButtonsControl == null) { |
| assertCompositeNotNull(parent); |
| |
| SelectionListener listener = new SelectionListener() { |
| @Override |
| public void widgetDefaultSelected(SelectionEvent e) { |
| doButtonSelected(e); |
| } |
| |
| @Override |
| public void widgetSelected(SelectionEvent e) { |
| doButtonSelected(e); |
| } |
| }; |
| |
| Composite contents = new Composite(parent, SWT.NONE); |
| contents.setFont(parent.getFont()); |
| |
| GridLayout layout = new GridLayout(); |
| layout.marginWidth = 0; |
| layout.marginHeight = 0; |
| contents.setLayout(layout); |
| |
| if (fButtonLabels != null) { |
| fButtonControls = new Button[fButtonLabels.length]; |
| for (int i = 0; i < fButtonLabels.length; i++) { |
| String currLabel = fButtonLabels[i]; |
| if (currLabel != null) { |
| fButtonControls[i] = createButton(contents, currLabel, |
| listener); |
| fButtonControls[i] |
| .setEnabled(isEnabled() && fButtonsEnabled[i]); |
| } else { |
| fButtonControls[i] = null; |
| createSeparator(contents); |
| } |
| } |
| } |
| |
| fLastSeparator = createSeparator(contents); |
| |
| updateButtonState(); |
| fButtonsControl = contents; |
| } |
| |
| return fButtonsControl; |
| } |
| |
| private void doButtonSelected(SelectionEvent e) { |
| if (fButtonControls != null) { |
| for (int i = 0; i < fButtonControls.length; i++) { |
| if (e.widget == fButtonControls[i]) { |
| buttonPressed(i); |
| return; |
| } |
| } |
| } |
| } |
| |
| /** |
| * Handles key events in the table viewer. Specifically when the delete key |
| * is pressed. |
| */ |
| protected void handleKeyPressed(KeyEvent event) { |
| if (event.character == SWT.DEL && event.stateMask == 0) { |
| if (fRemoveButtonIndex != -1 && isButtonEnabled( |
| fTree.getSelection(), fRemoveButtonIndex)) { |
| managedButtonPressed(fRemoveButtonIndex); |
| return; |
| } |
| } |
| fTreeAdapter.keyPressed(this, event); |
| } |
| |
| // ------ enable / disable management |
| |
| /* |
| * @see DialogField#dialogFieldChanged |
| */ |
| @Override |
| public void dialogFieldChanged() { |
| super.dialogFieldChanged(); |
| updateButtonState(); |
| } |
| |
| /* |
| * Updates the enable state of the all buttons |
| */ |
| protected void updateButtonState() { |
| if (fButtonControls != null && isOkToUse(fTreeControl) |
| && fTreeControl.isEnabled()) { |
| ISelection sel = fTree.getSelection(); |
| for (int i = 0; i < fButtonControls.length; i++) { |
| Button button = fButtonControls[i]; |
| if (isOkToUse(button)) { |
| button.setEnabled(isButtonEnabled(sel, i)); |
| } |
| } |
| } |
| } |
| |
| protected boolean containsAttributes(List selected) { |
| for (int i = 0; i < selected.size(); i++) { |
| if (!fElements.contains(selected.get(i))) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| protected boolean getManagedButtonState(ISelection sel, int index) { |
| List selected = getSelectedElements(); |
| boolean hasAttributes = containsAttributes(selected); |
| if (index == fRemoveButtonIndex) { |
| return !selected.isEmpty() && !hasAttributes; |
| } else if (index == fUpButtonIndex) { |
| return !sel.isEmpty() && !hasAttributes && canMoveUp(selected); |
| } else if (index == fDownButtonIndex) { |
| return !sel.isEmpty() && !hasAttributes && canMoveDown(selected); |
| } |
| return true; |
| } |
| |
| /* |
| * @see DialogField#updateEnableState |
| */ |
| @Override |
| protected void updateEnableState() { |
| super.updateEnableState(); |
| |
| boolean enabled = isEnabled(); |
| if (isOkToUse(fTreeControl)) { |
| if (!enabled) { |
| fSelectionWhenEnabled = fTree.getSelection(); |
| selectElements(null); |
| } else { |
| selectElements(fSelectionWhenEnabled); |
| fSelectionWhenEnabled = null; |
| } |
| fTreeControl.setEnabled(enabled); |
| } |
| updateButtonState(); |
| } |
| |
| /** |
| * Sets a button enabled or disabled. |
| */ |
| public void enableButton(int index, boolean enable) { |
| if (fButtonsEnabled != null && index < fButtonsEnabled.length) { |
| fButtonsEnabled[index] = enable; |
| updateButtonState(); |
| } |
| } |
| |
| private boolean isButtonEnabled(ISelection sel, int index) { |
| boolean extraState = getManagedButtonState(sel, index); |
| return isEnabled() && extraState && fButtonsEnabled[index]; |
| } |
| |
| // ------ model access |
| |
| /** |
| * Sets the elements shown in the list. |
| */ |
| public void setElements(List elements) { |
| fElements = new ArrayList(elements); |
| refresh(); |
| if (isOkToUse(fTreeControl)) { |
| fTree.expandToLevel(fTreeExpandLevel); |
| } |
| dialogFieldChanged(); |
| } |
| |
| /** |
| * Gets the elements shown in the list. The list returned is a copy, so it |
| * can be modified by the user. |
| */ |
| public List getElements() { |
| return new ArrayList(fElements); |
| } |
| |
| /** |
| * Gets the element shown at the given index. |
| */ |
| public Object getElement(int index) { |
| return fElements.get(index); |
| } |
| |
| /** |
| * Gets the index of an element in the list or -1 if element is not in list. |
| */ |
| public int getIndexOfElement(Object elem) { |
| return fElements.indexOf(elem); |
| } |
| |
| /** |
| * Replace an element. |
| */ |
| public void replaceElement(Object oldElement, Object newElement) |
| throws IllegalArgumentException { |
| int idx = fElements.indexOf(oldElement); |
| if (idx != -1) { |
| fElements.set(idx, newElement); |
| if (isOkToUse(fTreeControl)) { |
| List selected = getSelectedElements(); |
| if (selected.remove(oldElement)) { |
| selected.add(newElement); |
| } |
| boolean isExpanded = fTree.getExpandedState(oldElement); |
| fTree.remove(oldElement); |
| fTree.add(fParentElement, newElement); |
| if (isExpanded) { |
| fTree.expandToLevel(newElement, fTreeExpandLevel); |
| } |
| selectElements(new StructuredSelection(selected)); |
| } |
| dialogFieldChanged(); |
| } else { |
| throw new IllegalArgumentException(); |
| } |
| } |
| |
| /** |
| * Adds an element at the end of the tree list. |
| */ |
| public boolean addElement(Object element) { |
| if (fElements.contains(element)) { |
| return false; |
| } |
| fElements.add(element); |
| if (isOkToUse(fTreeControl)) { |
| fTree.add(fParentElement, element); |
| fTree.expandToLevel(element, fTreeExpandLevel); |
| } |
| dialogFieldChanged(); |
| return true; |
| } |
| |
| /** |
| * Adds elements at the end of the tree list. |
| */ |
| public boolean addElements(List elements) { |
| int nElements = elements.size(); |
| |
| if (nElements > 0) { |
| // filter duplicated |
| ArrayList elementsToAdd = new ArrayList(nElements); |
| |
| for (int i = 0; i < nElements; i++) { |
| Object elem = elements.get(i); |
| if (!fElements.contains(elem)) { |
| elementsToAdd.add(elem); |
| } |
| } |
| if (!elementsToAdd.isEmpty()) { |
| fElements.addAll(elementsToAdd); |
| if (isOkToUse(fTreeControl)) { |
| fTree.add(fParentElement, elementsToAdd.toArray()); |
| for (int i = 0; i < elementsToAdd.size(); i++) { |
| fTree.expandToLevel(elementsToAdd.get(i), |
| fTreeExpandLevel); |
| } |
| } |
| dialogFieldChanged(); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Adds an element at a position. |
| */ |
| public void insertElementAt(Object element, int index) { |
| if (fElements.contains(element)) { |
| return; |
| } |
| fElements.add(index, element); |
| if (isOkToUse(fTreeControl)) { |
| fTree.add(fParentElement, element); |
| if (fTreeExpandLevel != -1) { |
| fTree.expandToLevel(element, fTreeExpandLevel); |
| } |
| } |
| |
| dialogFieldChanged(); |
| } |
| |
| /** |
| * Adds an element at a position. |
| */ |
| public void removeAllElements() { |
| if (fElements.size() > 0) { |
| fElements.clear(); |
| refresh(); |
| dialogFieldChanged(); |
| } |
| } |
| |
| /** |
| * Removes an element from the list. |
| */ |
| public void removeElement(Object element) throws IllegalArgumentException { |
| if (fElements.remove(element)) { |
| if (isOkToUse(fTreeControl)) { |
| fTree.remove(element); |
| } |
| dialogFieldChanged(); |
| } else { |
| throw new IllegalArgumentException(); |
| } |
| } |
| |
| /** |
| * Removes elements from the list. |
| */ |
| public void removeElements(List elements) { |
| if (elements.size() > 0) { |
| fElements.removeAll(elements); |
| if (isOkToUse(fTreeControl)) { |
| fTree.remove(elements.toArray()); |
| } |
| dialogFieldChanged(); |
| } |
| } |
| |
| /** |
| * Gets the number of elements |
| */ |
| public int getSize() { |
| return fElements.size(); |
| } |
| |
| public void selectElements(ISelection selection) { |
| fSelectionWhenEnabled = selection; |
| if (isOkToUse(fTreeControl)) { |
| fTree.setSelection(selection, true); |
| } |
| } |
| |
| public void selectFirstElement() { |
| Object element = null; |
| if (fViewerSorter != null) { |
| Object[] arr = fElements.toArray(); |
| fViewerSorter.sort(fTree, arr); |
| if (arr.length > 0) { |
| element = arr[0]; |
| } |
| } else { |
| if (fElements.size() > 0) { |
| element = fElements.get(0); |
| } |
| } |
| if (element != null) { |
| selectElements(new StructuredSelection(element)); |
| } |
| } |
| |
| public void postSetSelection(final ISelection selection) { |
| if (isOkToUse(fTreeControl)) { |
| Display d = fTreeControl.getDisplay(); |
| d.asyncExec(() -> { |
| if (isOkToUse(fTreeControl)) { |
| selectElements(selection); |
| } |
| }); |
| } |
| } |
| |
| /** |
| * Refreshes the tree. |
| */ |
| @Override |
| public void refresh() { |
| super.refresh(); |
| if (isOkToUse(fTreeControl)) { |
| fTree.refresh(); |
| } |
| } |
| |
| /** |
| * Refreshes the tree. |
| */ |
| public void refresh(Object element) { |
| if (isOkToUse(fTreeControl)) { |
| fTree.refresh(element); |
| } |
| } |
| |
| /** |
| * Updates the element. |
| */ |
| public void update(Object element) { |
| if (isOkToUse(fTreeControl)) { |
| fTree.update(element, null); |
| } |
| } |
| |
| // ------- list maintenance |
| |
| private List moveUp(List elements, List move) { |
| int nElements = elements.size(); |
| List res = new ArrayList(nElements); |
| Object floating = null; |
| for (int i = 0; i < nElements; i++) { |
| Object curr = elements.get(i); |
| if (move.contains(curr)) { |
| res.add(curr); |
| } else { |
| if (floating != null) { |
| res.add(floating); |
| } |
| floating = curr; |
| } |
| } |
| if (floating != null) { |
| res.add(floating); |
| } |
| return res; |
| } |
| |
| private void moveUp(List toMoveUp) { |
| if (toMoveUp.size() > 0) { |
| setElements(moveUp(fElements, toMoveUp)); |
| fTree.reveal(toMoveUp.get(0)); |
| } |
| } |
| |
| private void moveDown(List toMoveDown) { |
| if (toMoveDown.size() > 0) { |
| setElements(reverse(moveUp(reverse(fElements), toMoveDown))); |
| fTree.reveal(toMoveDown.get(toMoveDown.size() - 1)); |
| } |
| } |
| |
| private List reverse(List p) { |
| List reverse = new ArrayList(p.size()); |
| for (int i = p.size() - 1; i >= 0; i--) { |
| reverse.add(p.get(i)); |
| } |
| return reverse; |
| } |
| |
| private void remove() { |
| removeElements(getSelectedElements()); |
| } |
| |
| private void up() { |
| moveUp(getSelectedElements()); |
| } |
| |
| private void down() { |
| moveDown(getSelectedElements()); |
| } |
| |
| private boolean canMoveUp(List selectedElements) { |
| if (isOkToUse(fTreeControl)) { |
| int nSelected = selectedElements.size(); |
| int nElements = fElements.size(); |
| for (int i = 0; i < nElements && nSelected > 0; i++) { |
| if (!selectedElements.contains(fElements.get(i))) { |
| return true; |
| } |
| nSelected--; |
| } |
| } |
| return false; |
| } |
| |
| private boolean canMoveDown(List selectedElements) { |
| if (isOkToUse(fTreeControl)) { |
| int nSelected = selectedElements.size(); |
| for (int i = fElements.size() - 1; i >= 0 && nSelected > 0; i--) { |
| if (!selectedElements.contains(fElements.get(i))) { |
| return true; |
| } |
| nSelected--; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Returns the selected elements. |
| */ |
| public List getSelectedElements() { |
| ArrayList result = new ArrayList(); |
| if (isOkToUse(fTreeControl)) { |
| ISelection selection = fTree.getSelection(); |
| if (selection instanceof IStructuredSelection) { |
| Iterator iter = ((IStructuredSelection) selection).iterator(); |
| while (iter.hasNext()) { |
| result.add(iter.next()); |
| } |
| } |
| } |
| return result; |
| } |
| |
| public void expandElement(Object element, int level) { |
| if (isOkToUse(fTreeControl)) { |
| fTree.expandToLevel(element, level); |
| } |
| } |
| |
| // ------- TreeViewerAdapter |
| |
| private class TreeViewerAdapter implements ITreeContentProvider, |
| ISelectionChangedListener, IDoubleClickListener { |
| |
| private final Object[] NO_ELEMENTS = new Object[0]; |
| |
| // ------- ITreeContentProvider Interface ------------ |
| |
| @Override |
| public void inputChanged(Viewer viewer, Object oldInput, |
| Object newInput) { |
| // will never happen |
| } |
| |
| @Override |
| public void dispose() { |
| } |
| |
| @Override |
| public Object[] getElements(Object obj) { |
| return fElements.toArray(); |
| } |
| |
| @Override |
| public Object[] getChildren(Object element) { |
| if (fTreeAdapter != null) { |
| return fTreeAdapter.getChildren(TreeListDialogField.this, |
| element); |
| } |
| return NO_ELEMENTS; |
| } |
| |
| @Override |
| public Object getParent(Object element) { |
| if (!fElements.contains(element) && fTreeAdapter != null) { |
| return fTreeAdapter.getParent(TreeListDialogField.this, |
| element); |
| } |
| return fParentElement; |
| } |
| |
| @Override |
| public boolean hasChildren(Object element) { |
| if (fTreeAdapter != null) { |
| return fTreeAdapter.hasChildren(TreeListDialogField.this, |
| element); |
| } |
| return false; |
| } |
| |
| // ------- ISelectionChangedListener Interface ------------ |
| |
| @Override |
| public void selectionChanged(SelectionChangedEvent event) { |
| doListSelected(event); |
| } |
| |
| @Override |
| public void doubleClick(DoubleClickEvent event) { |
| doDoubleClick(event); |
| } |
| |
| } |
| |
| protected void doListSelected(SelectionChangedEvent event) { |
| updateButtonState(); |
| if (fTreeAdapter != null) { |
| fTreeAdapter.selectionChanged(this); |
| } |
| } |
| |
| protected void doDoubleClick(DoubleClickEvent event) { |
| if (fTreeAdapter != null) { |
| fTreeAdapter.doubleClicked(this); |
| } |
| } |
| |
| } |