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/**
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* Copyright (C) 2018 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.preference.wizard;
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import org.eclipse.jface.resource.JFaceResources;
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import org.eclipse.jface.viewers.AbstractTreeViewer;
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import org.eclipse.jface.viewers.CheckboxTreeViewer;
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import org.eclipse.jface.viewers.IBaseLabelProvider;
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import org.eclipse.jface.viewers.ITreeContentProvider;
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import org.eclipse.jface.viewers.ITreeSelection;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.events.SelectionEvent;
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import org.eclipse.swt.events.SelectionListener;
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import org.eclipse.swt.graphics.Font;
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import org.eclipse.swt.layout.GridData;
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import org.eclipse.swt.layout.GridLayout;
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import org.eclipse.swt.widgets.Button;
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import org.eclipse.swt.widgets.Composite;
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import org.eclipse.swt.widgets.Tree;
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import org.eclipse.swt.widgets.TreeItem;
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import org.eclipse.swt.widgets.Widget;
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import eu.etaxonomy.taxeditor.model.ImageResources;
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/**
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* @author pplitzner
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* @since Oct 26, 2018
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*
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*/
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public class CheckBoxTreeComposite extends Composite implements SelectionListener {
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private static final Font FONT_DEFAULT = JFaceResources.getFontRegistry().get(JFaceResources.DEFAULT_FONT);
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private static final Font FONT_ITALIC = JFaceResources.getFontRegistry().getItalic(JFaceResources.DEFAULT_FONT);
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private static final Font FONT_BOLD = JFaceResources.getFontRegistry().getBold(JFaceResources.DEFAULT_FONT);
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private CheckboxTreeViewer viewer;
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private Button btnCollapse;
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private Button btnSelectChildren;
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private Button btnExpand;
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private Button btnSelectAllChildren;
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public CheckBoxTreeComposite(Composite parent, ITreeContentProvider contentProvider, IBaseLabelProvider labelProvider, int style) {
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super(parent, style);
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Composite composite = new Composite(parent, SWT.NULL);
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composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
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composite.setLayout(new GridLayout());
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Composite toolbar = new Composite(composite, SWT.NONE);
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toolbar.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, true, false, 1, 1));
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toolbar.setLayout(new GridLayout(4, false));
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btnCollapse = new Button(toolbar, SWT.NONE);
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btnCollapse.addSelectionListener(this);
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btnCollapse.setImage(ImageResources.getImage(ImageResources.COLLAPSE_ALL));
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btnExpand = new Button(toolbar, SWT.NONE);
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btnExpand.addSelectionListener(this);
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btnExpand.setImage(ImageResources.getImage(ImageResources.EXPAND));
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btnSelectAllChildren = new Button(toolbar, SWT.NONE);
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btnSelectAllChildren.addSelectionListener(this);
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btnSelectAllChildren.setImage(ImageResources.getImage(ImageResources.HIERARCHICAL));
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btnSelectChildren = new Button(toolbar, SWT.NONE);
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btnSelectChildren.addSelectionListener(this);
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btnSelectChildren.setImage(ImageResources.getImage(ImageResources.FLAT));
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btnSelectChildren.setVisible(false);
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Tree tree = new Tree(composite, SWT.BORDER | SWT.CHECK);
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tree.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
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tree.addListener(SWT.Selection, event -> {
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if (event.detail == SWT.CHECK) {
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TreeItem item = (TreeItem) event.item;
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boolean checked = item.getChecked();
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item.setGrayed(false);
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item.setChecked(checked);
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checkPath(item, checked, false);
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}
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});
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viewer = new CheckboxTreeViewer(tree);
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viewer.setContentProvider(contentProvider);
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viewer.setLabelProvider(labelProvider);
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}
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private void checkPath(TreeItem item, boolean checked, boolean grayed) {
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if (item == null) {
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return;
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}
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TreeItem[] items = item.getItems();
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if (grayed) {
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checked = true;
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} else {
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int index = 0;
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while (index < items.length) {
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TreeItem child = items[index];
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if (child.getGrayed() || checked != child.getChecked()) {
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checked = grayed = true;
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break;
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}
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index++;
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}
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}
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item.setGrayed(grayed);
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if(checked && items.length>0){
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item.setFont(FONT_BOLD);
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if(grayed){
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item.setFont(FONT_ITALIC);
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}
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}
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else{
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item.setFont(FONT_DEFAULT);
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}
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item.setExpanded(true);
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checkPath(item.getParentItem(), checked, grayed);
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}
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private void checkItems(TreeItem item, boolean checked, boolean recurseAll) {
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item.setGrayed(false);
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item.setChecked(checked);
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TreeItem[] items = item.getItems();
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if(items.length!=0){
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item.setFont(FONT_BOLD);
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}
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for (int i = 0; i < items.length; i++) {
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if(recurseAll){
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checkItems(items[i], checked, true);
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}
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else{
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// items[i].setGrayed(false);
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// items[i].setChecked(checked);
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// TreeItem[] children = items[i].getItems();
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// for (TreeItem child : children) {
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// child.setExpanded(true);
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// checkItems(child, false, false);
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// checkPath(child, false, false);
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// }
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}
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}
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}
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public CheckboxTreeViewer getViewer() {
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return viewer;
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}
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/**
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* Checks the tree items corresponding to the given elements.<br>
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* @param elements
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*/
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public void setCheckedElements(Object[] elements) {
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viewer.setCheckedElements(elements);
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for (Object element : elements) {
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Widget item = viewer.testFindItem(element);
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if(item instanceof TreeItem){
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checkPath((TreeItem) item, true, false);
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}
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}
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}
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@Override
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public void widgetSelected(SelectionEvent e) {
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ITreeSelection structuredSelection = viewer.getStructuredSelection();
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Object firstElement = structuredSelection.getFirstElement();
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if(e.widget == btnCollapse){
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viewer.collapseAll();
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}
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else if(e.widget == btnExpand){
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viewer.expandToLevel(firstElement, AbstractTreeViewer.ALL_LEVELS);
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}
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else if(e.widget == btnSelectChildren){
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TreeItem item = (TreeItem) viewer.testFindItem(firstElement);
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if(item!=null){
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viewer.expandToLevel(firstElement, 1);
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boolean checked = !item.getChecked();
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checkItems(item, checked, false);
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checkPath(item, checked, false);
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}
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}
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else if(e.widget == btnSelectAllChildren){
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viewer.expandToLevel(firstElement, AbstractTreeViewer.ALL_LEVELS);
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TreeItem item = (TreeItem) viewer.testFindItem(firstElement);
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if(item!=null){
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boolean checked = !item.getChecked();
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checkItems(item, checked, true);
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checkPath(item, checked, false);
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}
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}
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}
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@Override
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public void widgetDefaultSelected(SelectionEvent e) {
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}
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public Button getBtnCollapse() {
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return btnCollapse;
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}
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public Button getBtnSelectChildren() {
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return btnSelectChildren;
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}
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public Button getBtnExpand() {
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return btnExpand;
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}
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public Button getBtnSelectAllChildren() {
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return btnSelectAllChildren;
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}
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}
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