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/*******************************************************************************
* Copyright (c) 2006, 2015 Tom Schindl 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:
* Tom Schindl - initial API and implementation
* Jeanderson Candido <http://jeandersonbc.github.io> - Bug 414565
* Lars Vogel <Lars.Vogel@vogella.com> - Bug 475361
*******************************************************************************/
package org.eclipse.jface.snippets.viewers;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.ColumnViewerEditor;
import org.eclipse.jface.viewers.ColumnViewerEditorActivationEvent;
import org.eclipse.jface.viewers.ColumnViewerEditorActivationStrategy;
import org.eclipse.jface.viewers.EditingSupport;
import org.eclipse.jface.viewers.FocusCellOwnerDrawHighlighter;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.TreeViewerColumn;
import org.eclipse.jface.viewers.TreeViewerEditor;
import org.eclipse.jface.viewers.TreeViewerFocusCellManager;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
/**
* A simple TreeViewer to demonstrate usage
*
* @author Tom Schindl <tom.schindl@bestsolution.at>
*
*/
public class Snippet026TreeViewerTabEditing {
public Snippet026TreeViewerTabEditing(final Shell shell) {
Button b = new Button(shell, SWT.PUSH);
b.setText("Remove column");
final TreeViewer v = new TreeViewer(shell, SWT.BORDER
| SWT.FULL_SELECTION);
v.getTree().setLinesVisible(true);
v.getTree().setHeaderVisible(true);
b.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
if (v.getTree().getColumnCount() > 1) {
v.getTree().getColumn(1).dispose();
}
}
});
TreeViewerFocusCellManager focusCellManager = new TreeViewerFocusCellManager(
v, new FocusCellOwnerDrawHighlighter(v));
ColumnViewerEditorActivationStrategy actSupport = new ColumnViewerEditorActivationStrategy(
v) {
@Override
protected boolean isEditorActivationEvent(
ColumnViewerEditorActivationEvent event) {
return event.eventType == ColumnViewerEditorActivationEvent.TRAVERSAL
|| event.eventType == ColumnViewerEditorActivationEvent.MOUSE_DOUBLE_CLICK_SELECTION
|| (event.eventType == ColumnViewerEditorActivationEvent.KEY_PRESSED && event.keyCode == SWT.CR)
|| event.eventType == ColumnViewerEditorActivationEvent.PROGRAMMATIC;
}
};
int feature = ColumnViewerEditor.TABBING_HORIZONTAL
| ColumnViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR
| ColumnViewerEditor.TABBING_VERTICAL
| ColumnViewerEditor.KEYBOARD_ACTIVATION;
TreeViewerEditor.create(v, focusCellManager, actSupport, feature);
final TextCellEditor textCellEditor = new TextCellEditor(v.getTree());
String[] columLabels = { "Column 1", "Column 2", "Column 3" };
String[] labelPrefix = { "Column 1 => ", "Column 2 => ", "Column 3 => " };
for (int i = 0; i < columLabels.length; i++) {
TreeViewerColumn column = new TreeViewerColumn(v, SWT.NONE);
column.getColumn().setWidth(200);
column.getColumn().setMoveable(true);
column.getColumn().setText(columLabels[i]);
column.setLabelProvider(createColumnLabelProvider(labelPrefix[i]));
column.setEditingSupport(createEditingSupportFor(v, textCellEditor));
}
v.setContentProvider(new MyContentProvider());
v.setInput(createModel());
}
private ColumnLabelProvider createColumnLabelProvider(final String prefix) {
return new ColumnLabelProvider() {
@Override
public String getText(Object element) {
return prefix + element;
}
};
}
private EditingSupport createEditingSupportFor(final TreeViewer viewer,
final TextCellEditor textCellEditor) {
return new EditingSupport(viewer) {
@Override
protected boolean canEdit(Object element) {
return false;
}
@Override
protected CellEditor getCellEditor(Object element) {
return textCellEditor;
}
@Override
protected Object getValue(Object element) {
return ((MyModel) element).counter + "";
}
@Override
protected void setValue(Object element, Object value) {
((MyModel) element).counter = Integer
.parseInt(value.toString());
viewer.update(element, null);
}
};
}
private MyModel createModel() {
MyModel root = new MyModel(0, null);
root.counter = 0;
MyModel tmp;
MyModel subItem;
for (int i = 1; i < 10; i++) {
tmp = new MyModel(i, root);
root.child.add(tmp);
for (int j = 1; j < i; j++) {
subItem = new MyModel(j, tmp);
subItem.child.add(new MyModel(j * 100, subItem));
tmp.child.add(subItem);
}
}
return root;
}
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
new Snippet026TreeViewerTabEditing(shell);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
private static class MyContentProvider implements ITreeContentProvider {
@Override
public Object[] getElements(Object inputElement) {
return ((MyModel) inputElement).child.toArray();
}
@Override
public void dispose() {
}
@Override
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
}
@Override
public Object[] getChildren(Object parentElement) {
return getElements(parentElement);
}
@Override
public Object getParent(Object element) {
if (element == null) {
return null;
}
return ((MyModel) element).parent;
}
@Override
public boolean hasChildren(Object element) {
return ((MyModel) element).child.size() > 0;
}
}
public static class MyModel {
public MyModel parent;
public List<MyModel> child = new ArrayList<>();
public int counter;
public MyModel(int counter, MyModel parent) {
this.parent = parent;
this.counter = counter;
}
@Override
public String toString() {
String rv = "Item ";
if (parent != null) {
rv = parent + ".";
}
rv += counter;
return rv;
}
}
}
|
