| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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.ltk.internal.ui.refactoring; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Item; |
| import org.eclipse.swt.widgets.TreeItem; |
| import org.eclipse.swt.widgets.Widget; |
| |
| import org.eclipse.jface.viewers.CheckStateChangedEvent; |
| import org.eclipse.jface.viewers.CheckboxTreeViewer; |
| import org.eclipse.jface.viewers.ICheckStateListener; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.jface.viewers.ViewerFilter; |
| |
| class ChangeElementTreeViewer extends CheckboxTreeViewer { |
| |
| private static class GroupCategoryFilter extends ViewerFilter { |
| private List fGroupCategories; |
| public void setGroupCategory(List groupCategories) { |
| fGroupCategories= groupCategories; |
| } |
| public boolean select(Viewer viewer, Object parentElement, Object element) { |
| if (fGroupCategories == null) |
| return true; |
| return ((PreviewNode)element).hasOneGroupCategory(fGroupCategories); |
| } |
| } |
| |
| // Workaround for http://bugs.eclipse.org/bugs/show_bug.cgi?id=9390 |
| private List fDeferredTreeItemUpdates; |
| |
| public ChangeElementTreeViewer(Composite parentComposite) { |
| super(parentComposite, SWT.NONE); |
| addFilter(new GroupCategoryFilter()); |
| addCheckStateListener(new ICheckStateListener() { |
| public void checkStateChanged(CheckStateChangedEvent event){ |
| PreviewNode element= (PreviewNode)event.getElement(); |
| boolean checked= event.getChecked(); |
| |
| element.setEnabled(checked); |
| setSubtreeChecked(element, checked); |
| setSubtreeGrayed(element, false); |
| PreviewNode parent= element.getParent(); |
| while(parent != null) { |
| int active= parent.getActive(); |
| parent.setEnabledShallow(active == PreviewNode.PARTLY_ACTIVE || active == PreviewNode.ACTIVE); |
| boolean grayed= (active == PreviewNode.PARTLY_ACTIVE); |
| setChecked(parent, checked ? true : grayed); |
| setGrayed(parent, grayed); |
| parent= parent.getParent(); |
| } |
| } |
| }); |
| } |
| |
| public void setGroupCategory(List groupCategories) { |
| ((GroupCategoryFilter)(getFilters()[0])).setGroupCategory(groupCategories); |
| try { |
| fDeferredTreeItemUpdates= new ArrayList(); |
| refresh(); |
| processDeferredTreeItemUpdates(); |
| } finally { |
| fDeferredTreeItemUpdates= null; |
| } |
| } |
| |
| protected void handleInvalidSelection(ISelection invalidSelection, ISelection newSelection) { |
| PreviewNode next= getLeaf((PreviewNode)getInput(), true); |
| if (next != null) { |
| newSelection= new StructuredSelection(next); |
| setSelection(newSelection); |
| } |
| super.handleInvalidSelection(invalidSelection, newSelection); |
| } |
| |
| protected void inputChanged(Object input, Object oldInput) { |
| try { |
| fDeferredTreeItemUpdates= new ArrayList(); |
| super.inputChanged(input, oldInput); |
| processDeferredTreeItemUpdates(); |
| } finally { |
| fDeferredTreeItemUpdates= null; |
| } |
| } |
| |
| protected void doUpdateItem(Item item, Object element) { |
| super.doUpdateItem(item, element); |
| if (fDeferredTreeItemUpdates == null) { |
| applyCheckedState((TreeItem)item, (PreviewNode)element); |
| } else { |
| fDeferredTreeItemUpdates.add(item); |
| } |
| } |
| |
| private void processDeferredTreeItemUpdates() { |
| for (Iterator iter= fDeferredTreeItemUpdates.iterator(); iter.hasNext();) { |
| TreeItem item= (TreeItem)iter.next(); |
| applyCheckedState(item, (PreviewNode)item.getData()); |
| } |
| } |
| |
| private void applyCheckedState(TreeItem item, PreviewNode ce) { |
| int state= ce.getActive(); |
| boolean checked= state == PreviewNode.INACTIVE ? false : true; |
| item.setChecked(checked); |
| boolean grayed= state == PreviewNode.PARTLY_ACTIVE ? true : false; |
| item.setGrayed(grayed); |
| } |
| |
| protected void revealNext() { |
| revealElement(true); |
| } |
| |
| protected void revealPrevious() { |
| revealElement(false); |
| } |
| |
| private void setSubtreeGrayed(Object element, boolean grayed) { |
| Widget widget= findItem(element); |
| if (widget instanceof TreeItem) { |
| TreeItem item= (TreeItem)widget; |
| if (item.getGrayed() != grayed) { |
| item.setGrayed(grayed); |
| grayChildren(getChildren(item), grayed); |
| } |
| } |
| } |
| |
| private void grayChildren(Item[] items, boolean grayed) { |
| for (int i= 0; i < items.length; i++) { |
| Item element= items[i]; |
| if (element instanceof TreeItem) { |
| TreeItem item= (TreeItem)element; |
| if (item.getGrayed() != grayed) { |
| item.setGrayed(grayed); |
| grayChildren(getChildren(item), grayed); |
| } |
| } |
| } |
| } |
| |
| private void revealElement(boolean next) { |
| PreviewNode current= (PreviewNode)getInput(); |
| IStructuredSelection selection= (IStructuredSelection)getSelection(); |
| if (!selection.isEmpty()) |
| current= (PreviewNode)selection.iterator().next(); |
| |
| PreviewNode candidate= getLeaf(current, next); |
| if (candidate == null) { |
| candidate= getElement(current, next); |
| if (candidate != null) { |
| PreviewNode leaf= getLeaf(candidate, next); |
| if (leaf != null) |
| candidate= leaf; |
| } |
| } |
| if (candidate != null) |
| setSelection(new StructuredSelection(candidate), true); |
| else |
| getControl().getDisplay().beep(); |
| } |
| |
| private PreviewNode getLeaf(PreviewNode element, boolean first) { |
| PreviewNode result= null; |
| PreviewNode[] children= getFilteredChildrenAsPreviewNodes(element); |
| while(children != null && children.length > 0) { |
| result= children[first ? 0 : children.length - 1]; |
| children= getFilteredChildrenAsPreviewNodes(result); |
| } |
| return result; |
| } |
| |
| private PreviewNode getElement(PreviewNode element, boolean next) { |
| while(true) { |
| PreviewNode parent= element.getParent(); |
| if (parent == null) |
| return null; |
| PreviewNode candidate= getSibling( |
| getFilteredChildrenAsPreviewNodes(parent), |
| element, next); |
| if (candidate != null) |
| return candidate; |
| element= parent; |
| } |
| } |
| |
| private PreviewNode getSibling(PreviewNode[] children, PreviewNode element, boolean next) { |
| for (int i= 0; i < children.length; i++) { |
| if (children[i] == element) { |
| if (next) |
| if (i < children.length - 1) |
| return children[i + 1]; |
| else |
| return null; |
| else |
| if (i > 0) |
| return children[i - 1]; |
| else |
| return null; |
| } |
| } |
| return null; |
| } |
| |
| private PreviewNode[] getFilteredChildrenAsPreviewNodes(PreviewNode parent) { |
| Object[] filtered= getFilteredChildren(parent); |
| PreviewNode[] result= new PreviewNode[filtered.length]; |
| for (int i= 0; i < result.length; i++) { |
| result[i]= (PreviewNode)filtered[i]; |
| } |
| return result; |
| } |
| } |