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/*******************************************************************************
* Copyright (c) 2006, 2018 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, 489234
*******************************************************************************/
package org.eclipse.jface.snippets.viewers;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.CheckboxCellEditor;
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.jface.viewers.ViewerCell;
import org.eclipse.jface.viewers.ViewerRow;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.TraverseEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
/**
* Demonstrate how to work-around 3.3.1 limitation when it comes to TAB-Traversal and
* checkbox editors. 3.4 will hopefully provide provide an out-of-the-box fix see bug 198502
*
* @author Tom Schindl <tom.schindl@bestsolution.at>
*
*/
public class Snippet048TreeViewerTabWithCheckboxFor3_3 {
public Snippet048TreeViewerTabWithCheckboxFor3_3(final Shell shell) {
final TreeViewer v = new TreeViewer(shell, SWT.BORDER
| SWT.FULL_SELECTION);
v.getTree().setLinesVisible(true);
v.getTree().setHeaderVisible(true);
final TreeViewerFocusCellManager mgr = 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.character == ' ' ))
|| event.eventType == ColumnViewerEditorActivationEvent.PROGRAMMATIC;
}
};
TreeViewerEditor.create(v, mgr, actSupport, ColumnViewerEditor.TABBING_HORIZONTAL
| ColumnViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR
| ColumnViewerEditor.TABBING_VERTICAL | ColumnViewerEditor.KEYBOARD_ACTIVATION);
final TextCellEditor textCellEditor = new TextCellEditor(v.getTree());
final CheckboxCellEditor checkboxCellEditor = new CheckboxCellEditor(v.getTree());
TreeViewerColumn column = new TreeViewerColumn(v, SWT.NONE);
column.getColumn().setWidth(200);
column.getColumn().setMoveable(true);
column.getColumn().setText("Column 1");
column.setLabelProvider(new ColumnLabelProvider() {
@Override
public String getText(Object element) {
return "Column 1 => " + element;
}
});
column.setEditingSupport(new EditingSupport(v) {
@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());
v.update(element, null);
}
});
column = new TreeViewerColumn(v, SWT.NONE);
column.getColumn().setWidth(200);
column.getColumn().setMoveable(true);
column.getColumn().setText("Column 2");
column.setLabelProvider(new ColumnLabelProvider() {
@Override
public String getText(Object element) {
return "Column 2 => " + element;
}
});
column.setEditingSupport(new EditingSupport(v) {
@Override
protected boolean canEdit(Object element) {
return true;
}
@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());
v.update(element, null);
}
});
column = new TreeViewerColumn(v, SWT.NONE);
column.getColumn().setWidth(200);
column.getColumn().setMoveable(true);
column.getColumn().setText("Column 3");
column.setLabelProvider(new ColumnLabelProvider() {
@Override
public String getText(Object element) {
return ((MyModel)element).bool + "";
}
});
column.setEditingSupport(new EditingSupport(v) {
@Override
protected boolean canEdit(Object element) {
return true;
}
@Override
protected CellEditor getCellEditor(Object element) {
return checkboxCellEditor;
}
@Override
protected Object getValue(Object element) {
return Boolean.valueOf(((MyModel) element).bool);
}
@Override
protected void setValue(Object element, Object value) {
((MyModel) element).bool = ((Boolean)value).booleanValue();
v.update(element, null);
}
});
v.setContentProvider(new MyContentProvider());
v.setInput(createModel());
v.getControl().addTraverseListener(e -> {
if( (e.detail == SWT.TRAVERSE_TAB_NEXT || e.detail == SWT.TRAVERSE_TAB_PREVIOUS) && mgr.getFocusCell().getColumnIndex() == 2 ) {
ColumnViewerEditor editor = v.getColumnViewerEditor();
ViewerCell cell = mgr.getFocusCell();
try {
Method m = ColumnViewerEditor.class.getDeclaredMethod("processTraverseEvent", new Class[] {int.class,ViewerRow.class,TraverseEvent.class});
m.setAccessible(true);
m.invoke(editor, Integer.valueOf(cell.getColumnIndex()), cell.getViewerRow(), e);
} catch (SecurityException | NoSuchMethodException | IllegalArgumentException | IllegalAccessException | InvocationTargetException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
}
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 Snippet048TreeViewerTabWithCheckboxFor3_3(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 boolean bool;
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;
}
}
}
|