--- /dev/null
+package net.sourceforge.phpdt.internal.ui.dialogs;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import net.sourceforge.phpdt.internal.ui.viewsupport.ContainerCheckedTreeViewer;
+
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.jface.dialogs.IDialogConstants;
+import org.eclipse.jface.viewers.CheckStateChangedEvent;
+import org.eclipse.jface.viewers.CheckboxTreeViewer;
+import org.eclipse.jface.viewers.ICheckStateListener;
+import org.eclipse.jface.viewers.ILabelProvider;
+import org.eclipse.jface.viewers.ITreeContentProvider;
+import org.eclipse.jface.viewers.ViewerFilter;
+import org.eclipse.jface.viewers.ViewerSorter;
+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.Tree;
+
+/**
+ * A class to select elements out of a tree structure.
+ */
+public class CheckedTreeSelectionDialog extends SelectionStatusDialog {
+
+ private CheckboxTreeViewer fViewer;
+
+ private ILabelProvider fLabelProvider;
+
+ private ITreeContentProvider fContentProvider;
+
+ private ISelectionValidator fValidator = null;
+
+ private ViewerSorter fSorter;
+
+ private String fEmptyListMessage = "No entries available";
+
+ private IStatus fCurrStatus = new StatusInfo();
+
+ private List fFilters;
+
+ private Object fInput;
+
+ private boolean fIsEmpty;
+
+ private int fWidth = 60;
+
+ private int fHeight = 18;
+
+ private boolean fContainerMode;
+
+ private Object[] fExpandedElements;
+
+ /**
+ * 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 CheckedTreeSelectionDialog(Shell parent,
+ ILabelProvider labelProvider, ITreeContentProvider contentProvider) {
+ super(parent);
+
+ fLabelProvider = labelProvider;
+ fContentProvider = contentProvider;
+
+ setResult(new ArrayList(0));
+ setStatusLineAboveButtons(true);
+
+ fContainerMode = false;
+ fExpandedElements = null;
+
+ int shellStyle = getShellStyle();
+ setShellStyle(shellStyle | SWT.MAX | SWT.RESIZE);
+ }
+
+ /**
+ * If set, the checked /gray state of containers (inner nodes) is derived
+ * from the checked state of its leaf nodes.
+ *
+ * @param containerMode
+ * The containerMode to set
+ */
+ public void setContainerMode(boolean containerMode) {
+ fContainerMode = containerMode;
+ }
+
+ /**
+ * 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;
+ }
+
+ /**
+ * Sets the sorter used by the tree viewer.
+ */
+ public void setSorter(ViewerSorter sorter) {
+ fSorter = sorter;
+ }
+
+ /**
+ * 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(ISelectionValidator validator) {
+ fValidator = validator;
+ }
+
+ /**
+ * Sets the tree input.
+ *
+ * @param input
+ * the tree input.
+ */
+ public void setInput(Object input) {
+ fInput = input;
+ }
+
+ /**
+ * Expands the tree
+ */
+ public void setExpandedElements(Object[] elements) {
+ fExpandedElements = elements;
+ }
+
+ /**
+ * 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 = new StatusInfo();
+ }
+ } else {
+ fCurrStatus = new StatusInfo(IStatus.ERROR, fEmptyListMessage);
+ }
+ updateStatus(fCurrStatus);
+ }
+
+ /*
+ * @see Window#open()
+ */
+ public int open() {
+ fIsEmpty = evaluateIfTreeEmpty(fInput);
+ BusyIndicator.showWhile(null, new Runnable() {
+ public void run() {
+ access$superOpen();
+ }
+ });
+
+ return getReturnCode();
+ }
+
+ private void access$superOpen() {
+ super.open();
+ }
+
+ /**
+ * Handles cancel button pressed event.
+ */
+ protected void cancelPressed() {
+ setResult(null);
+ super.cancelPressed();
+ }
+
+ /*
+ * @see SelectionStatusDialog#computeResult()
+ */
+ protected void computeResult() {
+ setResult(Arrays.asList(fViewer.getCheckedElements()));
+ }
+
+ /*
+ * @see Window#create()
+ */
+ public void create() {
+ super.create();
+
+ List initialSelections = getInitialElementSelections();
+ if (initialSelections != null) {
+ fViewer.setCheckedElements(initialSelections.toArray());
+ }
+
+ if (fExpandedElements != null) {
+ fViewer.setExpandedElements(fExpandedElements);
+ }
+
+ updateOKStatus();
+ }
+
+ /*
+ * @see Dialog#createDialogArea(Composite)
+ */
+ protected Control createDialogArea(Composite parent) {
+ Composite composite = (Composite) super.createDialogArea(parent);
+
+ Label messageLabel = createMessageArea(composite);
+ Control treeWidget = createTreeViewer(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);
+ }
+
+ return composite;
+ }
+
+ private Tree createTreeViewer(Composite parent) {
+ if (fContainerMode) {
+ fViewer = new ContainerCheckedTreeViewer(parent, SWT.BORDER);
+ } else {
+ fViewer = new CheckboxTreeViewer(parent, SWT.BORDER);
+ }
+
+ fViewer.setContentProvider(fContentProvider);
+ fViewer.setLabelProvider(fLabelProvider);
+ fViewer.addCheckStateListener(new ICheckStateListener() {
+ public void checkStateChanged(CheckStateChangedEvent event) {
+ updateOKStatus();
+ }
+ });
+
+ fViewer.setSorter(fSorter);
+ if (fFilters != null) {
+ for (int i = 0; i != fFilters.size(); i++)
+ fViewer.addFilter((ViewerFilter) fFilters.get(i));
+ }
+
+ fViewer.setInput(fInput);
+
+ return fViewer.getTree();
+ }
+
+ /**
+ * 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, "Select &All", false);
+
+ SelectionListener listener = new SelectionAdapter() {
+ public void widgetSelected(SelectionEvent e) {
+ fViewer
+ .setCheckedElements(fContentProvider
+ .getElements(fInput));
+ updateOKStatus();
+ }
+ };
+ selectButton.addSelectionListener(listener);
+
+ Button deselectButton = createButton(buttonComposite,
+ IDialogConstants.DESELECT_ALL_ID, "&Deselect All", false);
+
+ listener = new SelectionAdapter() {
+ public void widgetSelected(SelectionEvent e) {
+ fViewer.setCheckedElements(new Object[0]);
+ updateOKStatus();
+ }
+ };
+ deselectButton.addSelectionListener(listener);
+ return buttonComposite;
+ }
+
+ private boolean evaluateIfTreeEmpty(Object input) {
+ Object[] elements = fContentProvider.getElements(input);
+ if (elements.length > 0) {
+ if (fFilters != null) {
+ for (int i = 0; i < fFilters.size(); i++) {
+ ViewerFilter curr = (ViewerFilter) fFilters.get(i);
+ elements = curr.filter(fViewer, input, elements);
+ }
+ }
+ }
+ return elements.length == 0;
+ }
+
+}
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