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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
* Henrik Still <hendrik.still@gammas.de> - Bug 415875
* 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.ColumnViewer;
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.TreePath;
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.GridData;
import org.eclipse.swt.layout.GridLayout;
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 Snippet055HideShowColumn {
private static final class MyEditingSupport extends EditingSupport {
private final TreeViewer v;
private final TextCellEditor textCellEditor;
private MyEditingSupport(ColumnViewer viewer, TreeViewer v,
TextCellEditor textCellEditor) {
super(viewer);
this.v = v;
this.textCellEditor = textCellEditor;
}
@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);
}
}
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;
}
}
static class MyColumnLabelProvider extends ColumnLabelProvider {
private String prefix;
public MyColumnLabelProvider(String prefix) {
this.prefix = prefix;
}
@Override
public String getText(Object element) {
return prefix + " => " + element;
}
}
public Snippet055HideShowColumn(final Shell shell) {
final TreeViewer v = new TreeViewer(shell, SWT.BORDER
| SWT.FULL_SELECTION);
v.getTree().setLayoutData(
new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1));
v.getTree().setLinesVisible(true);
v.getTree().setHeaderVisible(true);
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;
}
};
TreeViewerEditor.create(v, focusCellManager, actSupport,
ColumnViewerEditor.TABBING_HORIZONTAL
| ColumnViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR
| ColumnViewerEditor.TABBING_VERTICAL
| ColumnViewerEditor.KEYBOARD_ACTIVATION);
final TextCellEditor textCellEditor = new TextCellEditor(v.getTree());
createColumnFor(v, "Column 1", textCellEditor);
final TreeViewerColumn column_2 = createColumnFor(v, "Column 2",
textCellEditor);
createColumnFor(v, "Column 3", textCellEditor);
v.setContentProvider(new MyContentProvider());
v.setInput(createModel());
Button b = createButtonFor(shell, "Edit-Element");
b.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
MyModel root = (MyModel) v.getInput();
TreePath path = new TreePath(new Object[] { root,
root.child.get(1), root.child.get(1).child.get(0) });
v.editElement(path, 0);
}
});
b = createButtonFor(shell, "Hide/Show 2nd Column");
b.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
int width = column_2.getColumn().getWidth();
column_2.getColumn().setWidth(width == 0 ? 200 : 0);
}
});
}
private TreeViewerColumn createColumnFor(final TreeViewer v, String label,
TextCellEditor textCellEditor) {
TreeViewerColumn column = new TreeViewerColumn(v, SWT.NONE);
column.getColumn().setWidth(200);
column.getColumn().setMoveable(true);
column.getColumn().setText(label);
column.setLabelProvider(new MyColumnLabelProvider(label));
column.setEditingSupport(new MyEditingSupport(v, v, textCellEditor));
return column;
}
private Button createButtonFor(final Shell shell, String label) {
Button b = new Button(shell, SWT.PUSH);
b.setText(label);
b.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
return b;
}
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;
}
}
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 GridLayout(2, true));
new Snippet055HideShowColumn(shell);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
|