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/*******************************************************************************
* Copyright (c) 2006, 2014 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
* Lars Vogel (lars.vogel@gmail.com) - Bug 413427
* Jeanderson Candido (http://jeandersonbc.github.io) - Bug 414565
*******************************************************************************/
package org.eclipse.jface.snippets.viewers;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.EditingSupport;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;
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.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
/**
* Example usage of ViewerComparator in tables to allow sorting
*
* @author Tom Schindl <tom.schindl@bestsolution.at>
*
*/
public class Snippet040TableViewerSorting {
public static class Person {
public String givenname;
public String surname;
public String email;
public Person(String givenname, String surname, String email) {
this.givenname = givenname;
this.surname = surname;
this.email = email;
}
}
protected abstract class AbstractEditingSupport extends EditingSupport {
private TextCellEditor editor;
public AbstractEditingSupport(TableViewer viewer) {
super(viewer);
this.editor = new TextCellEditor(viewer.getTable());
}
@Override
protected boolean canEdit(Object element) {
return true;
}
@Override
protected CellEditor getCellEditor(Object element) {
return editor;
}
@Override
protected void setValue(Object element, Object value) {
doSetValue(element, value);
getViewer().update(element, null);
}
protected abstract void doSetValue(Object element, Object value);
}
public Snippet040TableViewerSorting(Shell shell) {
TableViewer viewer = new TableViewer(shell, SWT.BORDER
| SWT.FULL_SELECTION);
viewer.setContentProvider(ArrayContentProvider.getInstance());
TableViewerColumn column = createColumnFor(viewer, "Givenname");
column.setLabelProvider(new ColumnLabelProvider() {
@Override
public String getText(Object element) {
return ((Person) element).givenname;
}
});
column.setEditingSupport(new AbstractEditingSupport(viewer) {
@Override
protected Object getValue(Object element) {
return ((Person) element).givenname;
}
@Override
protected void doSetValue(Object element, Object value) {
((Person) element).givenname = value.toString();
}
});
ColumnViewerComparator cSorter = new ColumnViewerComparator(viewer, column) {
@Override
protected int doCompare(Viewer viewer, Object e1, Object e2) {
Person p1 = (Person) e1;
Person p2 = (Person) e2;
return p1.givenname.compareToIgnoreCase(p2.givenname);
}
};
column = createColumnFor(viewer, "Surname");
column.setLabelProvider(new ColumnLabelProvider() {
@Override
public String getText(Object element) {
return ((Person) element).surname;
}
});
column.setEditingSupport(new AbstractEditingSupport(viewer) {
@Override
protected Object getValue(Object element) {
return ((Person) element).surname;
}
@Override
protected void doSetValue(Object element, Object value) {
((Person) element).surname = value.toString();
}
});
new ColumnViewerComparator(viewer, column) {
@Override
protected int doCompare(Viewer viewer, Object e1, Object e2) {
Person p1 = (Person) e1;
Person p2 = (Person) e2;
return p1.surname.compareToIgnoreCase(p2.surname);
}
};
column = createColumnFor(viewer, "E-Mail");
column.setLabelProvider(new ColumnLabelProvider() {
@Override
public String getText(Object element) {
return ((Person) element).email;
}
});
column.setEditingSupport(new AbstractEditingSupport(viewer) {
@Override
protected Object getValue(Object element) {
return ((Person) element).email;
}
@Override
protected void doSetValue(Object element, Object value) {
((Person) element).email = value.toString();
}
});
new ColumnViewerComparator(viewer, column) {
@Override
protected int doCompare(Viewer viewer, Object e1, Object e2) {
Person p1 = (Person) e1;
Person p2 = (Person) e2;
return p1.email.compareToIgnoreCase(p2.email);
}
};
viewer.setInput(createModel());
viewer.getTable().setLinesVisible(true);
viewer.getTable().setHeaderVisible(true);
cSorter.setSorter(cSorter, ColumnViewerComparator.ASC);
}
private TableViewerColumn createColumnFor(TableViewer viewer, String label) {
TableViewerColumn column = new TableViewerColumn(viewer, SWT.NONE);
column.getColumn().setWidth(200);
column.getColumn().setText(label);
column.getColumn().setMoveable(true);
return column;
}
private Person[] createModel() {
return new Person[] {
new Person("Tom", "Schindl", "tom.schindl@bestsolution.at"),
new Person("Boris", "Bokowski", "Boris_Bokowski@ca.ibm.com"),
new Person("Tod", "Creasey", "Tod_Creasey@ca.ibm.com"),
new Person("Wayne", "Beaton", "wayne@eclipse.org"),
new Person("Jeanderson", "Candido", "jeandersonbc@gmail.com"),
new Person("Lars", "Vogel", "Lars.Vogel@gmail.com"),
new Person("Hendrik", "Still", "hendrik.still@gammas.de") };
}
private static abstract class ColumnViewerComparator extends ViewerComparator {
public static final int ASC = 1;
public static final int NONE = 0;
public static final int DESC = -1;
private int direction = 0;
private TableViewerColumn column;
private ColumnViewer viewer;
public ColumnViewerComparator(ColumnViewer viewer, TableViewerColumn column) {
this.column = column;
this.viewer = viewer;
SelectionAdapter selectionAdapter = createSelectionAdapter();
this.column.getColumn().addSelectionListener(selectionAdapter);
}
private SelectionAdapter createSelectionAdapter() {
return new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
if (ColumnViewerComparator.this.viewer.getComparator() != null) {
if (ColumnViewerComparator.this.viewer.getComparator() == ColumnViewerComparator.this) {
int tdirection = ColumnViewerComparator.this.direction;
if (tdirection == ASC) {
setSorter(ColumnViewerComparator.this, DESC);
} else if (tdirection == DESC) {
setSorter(ColumnViewerComparator.this, NONE);
}
} else {
setSorter(ColumnViewerComparator.this, ASC);
}
} else {
setSorter(ColumnViewerComparator.this, ASC);
}
}
};
}
public void setSorter(ColumnViewerComparator sorter, int direction) {
Table columnParent = column.getColumn().getParent();
if (direction == NONE) {
columnParent.setSortColumn(null);
columnParent.setSortDirection(SWT.NONE);
viewer.setComparator(null);
} else {
columnParent.setSortColumn(column.getColumn());
sorter.direction = direction;
columnParent.setSortDirection(direction == ASC ? SWT.DOWN : SWT.UP);
if (viewer.getComparator() == sorter) {
viewer.refresh();
} else {
viewer.setComparator(sorter);
}
}
}
@Override
public int compare(Viewer viewer, Object e1, Object e2) {
return direction * doCompare(viewer, e1, e2);
}
protected abstract int doCompare(Viewer viewer, Object e1, Object e2);
}
/**
* @param args
*/
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
new Snippet040TableViewerSorting(shell);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
|