| /******************************************************************************* |
| * 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 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.wizards.dialogfields; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| 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; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| import org.eclipse.jface.layout.PixelConverter; |
| import org.eclipse.jface.viewers.DelegatingStyledCellLabelProvider; |
| import org.eclipse.jface.viewers.DelegatingStyledCellLabelProvider.IStyledLabelProvider; |
| 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.jdt.internal.ui.util.SWTUtil; |
| |
| |
| /** |
| * A tree with a button bar. |
| * Typical buttons are 'Add', 'Remove', 'Up' and 'Down'. |
| * Tree model is independent of widget creation. |
| * DialogFields controls are: Label, Tree, and Composite containing buttons. |
| * |
| * @param <E> the type of the root elements |
| */ |
| public class TreeListDialogField<E> extends DialogField { |
| |
| protected TreeViewer fTree; |
| protected ILabelProvider fLabelProvider; |
| protected TreeViewerAdapter fTreeViewerAdapter; |
| protected List<E> fElements; |
| protected ViewerComparator fViewerComparator; |
| |
| 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<E> fTreeAdapter; |
| |
| private Object fParentElement; |
| private int fTreeExpandLevel; |
| |
| /** |
| * @param adapter Can be <code>null</code>. |
| */ |
| public TreeListDialogField(ITreeListAdapter<E> 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) { |
| Assert.isTrue(removeButtonIndex < fButtonLabels.length); |
| 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) { |
| Assert.isTrue(upButtonIndex < fButtonLabels.length); |
| 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) { |
| Assert.isTrue(downButtonIndex < fButtonLabels.length); |
| fDownButtonIndex= downButtonIndex; |
| } |
| |
| /** |
| * Sets the viewer comparator. |
| * @param viewerComparator The viewer comparator to set |
| */ |
| public void setViewerComparator(ViewerComparator viewerComparator) { |
| fViewerComparator= 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); |
| if(fLabelProvider instanceof IStyledLabelProvider) { |
| fTree.setLabelProvider(new DelegatingStyledCellLabelProvider((IStyledLabelProvider) fLabelProvider)); |
| } else { |
| fTree.setLabelProvider(fLabelProvider); |
| } |
| fTree.addSelectionChangedListener(fTreeViewerAdapter); |
| fTree.addDoubleClickListener(fTreeViewerAdapter); |
| |
| fTree.setInput(fParentElement); |
| fTree.expandToLevel(fTreeExpandLevel); |
| |
| if (fViewerComparator != null) { |
| fTree.setComparator(fViewerComparator); |
| } |
| |
| fTreeControl.setEnabled(isEnabled()); |
| if (fSelectionWhenEnabled != null) { |
| postSetSelection(fSelectionWhenEnabled); |
| } |
| } |
| return fTreeControl; |
| } |
| |
| /** |
| * @return the internally used tree viewer, or <code>null</code> if the UI has not been created yet |
| */ |
| public TreeViewer getTreeViewer() { |
| return fTree; |
| } |
| |
| /** |
| * @param idx the index of the button |
| * @return the button control, or <code>null</code> if the UI has not been created yet |
| */ |
| public Button getButton(int idx) { |
| return fButtonControls == null ? null : fButtonControls[idx]; |
| } |
| |
| /* |
| * 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<Object> selected) { |
| return !fElements.containsAll(selected); |
| } |
| |
| |
| protected boolean getManagedButtonState(ISelection sel, int index) { |
| List<Object> 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) { |
| if (fSelectionWhenEnabled == null) { |
| fSelectionWhenEnabled= fTree.getSelection(); |
| selectElements(null); |
| } |
| } else if (fSelectionWhenEnabled != null) { |
| selectElements(fSelectionWhenEnabled); |
| } |
| 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<E> 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<E> getElements() { |
| return new ArrayList<>(fElements); |
| } |
| |
| /** |
| * Gets the element shown at the given index. |
| */ |
| public E 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(E oldElement, E newElement) throws IllegalArgumentException { |
| int idx= fElements.indexOf(oldElement); |
| if (idx != -1) { |
| fElements.set(idx, newElement); |
| if (isOkToUse(fTreeControl)) { |
| List<Object> 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(E 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<E> elements) { |
| int nElements= elements.size(); |
| |
| if (nElements > 0) { |
| // filter duplicated |
| ArrayList<E> elementsToAdd= new ArrayList<>(nElements); |
| |
| for (int i= 0; i < nElements; i++) { |
| E 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 (E element : elementsToAdd) { |
| fTree.expandToLevel(element, fTreeExpandLevel); |
| } |
| } |
| dialogFieldChanged(); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Adds an element at a position. |
| */ |
| public void insertElementAt(E 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(E 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 (fViewerComparator != null) { |
| Object[] arr= fElements.toArray(); |
| fViewerComparator.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(new Runnable() { |
| @Override |
| public void run() { |
| 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<E> moveUp(List<E> elements, List<E> move) { |
| int nElements= elements.size(); |
| List<E> res= new ArrayList<>(nElements); |
| E floating= null; |
| for (E curr : elements) { |
| 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<E> toMoveUp) { |
| if (toMoveUp.size() > 0) { |
| setElements(moveUp(fElements, toMoveUp)); |
| fTree.reveal(toMoveUp.get(0)); |
| } |
| } |
| |
| private void moveDown(List<E> toMoveDown) { |
| if (toMoveDown.size() > 0) { |
| setElements(reverse(moveUp(reverse(fElements), toMoveDown))); |
| fTree.reveal(toMoveDown.get(toMoveDown.size() - 1)); |
| } |
| } |
| |
| private List<E> reverse(List<E> p) { |
| List<E> reverse= new ArrayList<>(p); |
| Collections.reverse(reverse); |
| return reverse; |
| } |
| |
| private void remove() { |
| removeElements(getSelectedElements()); |
| } |
| |
| private void up() { |
| moveUp(getSelectedRootElements()); |
| } |
| |
| private void down() { |
| moveDown(getSelectedRootElements()); |
| } |
| |
| private boolean canMoveUp(List<Object> 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<Object> 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<Object> getSelectedElements() { |
| ArrayList<Object> 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 List<E> getSelectedRootElements() { |
| ArrayList<E> result= new ArrayList<>(); |
| if (isOkToUse(fTreeControl)) { |
| ISelection selection= fTree.getSelection(); |
| if (selection instanceof IStructuredSelection) { |
| Iterator<?> iter= ((IStructuredSelection)selection).iterator(); |
| while (iter.hasNext()) { |
| Object element= iter.next(); |
| if (fElements.contains(element)) { |
| @SuppressWarnings("unchecked") |
| E rootElement= (E) element; |
| result.add(rootElement); |
| } |
| } |
| } |
| } |
| 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); |
| } |
| } |
| |
| |
| |
| } |