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| 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.IStructuredContentProvider;
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.ViewerCell;
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.TableItem;
/**
* Example usage of ViewerComparator in tables to allow sorting
*
* @author Tom Schindl <tom.schindl@bestsolution.at>
*
*/
public class Snippet040TableViewerSorting {
public class Person {
public String givenname;
public String surname;
public String email;
public Person(final String givenname, final String surname,
final String email) {
this.givenname = givenname;
this.surname = surname;
this.email = email;
}
}
protected abstract class AbstractEditingSupport extends EditingSupport {
private final TextCellEditor editor;
public AbstractEditingSupport(final TableViewer viewer) {
super(viewer);
this.editor = new TextCellEditor(viewer.getTable());
}
@Override
protected boolean canEdit(final Object element) {
return true;
}
protected abstract void doSetValue(Object element, Object value);
@Override
protected CellEditor getCellEditor(final Object element) {
return editor;
}
@Override
protected void setValue(final Object element, final Object value) {
doSetValue(element, value);
getViewer().update(element, null);
}
}
private static abstract class ColumnViewerSorter 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 final TableViewerColumn column;
private final ColumnViewer viewer;
public ColumnViewerSorter(final ColumnViewer viewer,
final TableViewerColumn column) {
this.column = column;
this.viewer = viewer;
this.column.getColumn().addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(final SelectionEvent e) {
if (ColumnViewerSorter.this.viewer.getComparator() != null) {
if (ColumnViewerSorter.this.viewer.getComparator() == ColumnViewerSorter.this) {
final int tdirection = ColumnViewerSorter.this.direction;
if (tdirection == ASC) {
setSorter(ColumnViewerSorter.this, DESC);
} else if (tdirection == DESC) {
setSorter(ColumnViewerSorter.this, NONE);
}
} else {
setSorter(ColumnViewerSorter.this, ASC);
}
} else {
setSorter(ColumnViewerSorter.this, ASC);
}
}
});
}
@Override
public int compare(final Viewer viewer, final Object e1, final Object e2) {
return direction * doCompare(viewer, e1, e2);
}
public void setSorter(final ColumnViewerSorter sorter, final int direction) {
if (direction == NONE) {
column.getColumn().getParent().setSortColumn(null);
column.getColumn().getParent().setSortDirection(SWT.NONE);
viewer.setComparator(null);
} else {
column.getColumn().getParent().setSortColumn(column.getColumn());
sorter.direction = direction;
if (direction == ASC) {
column.getColumn().getParent().setSortDirection(SWT.DOWN);
} else {
column.getColumn().getParent().setSortDirection(SWT.UP);
}
if (viewer.getComparator() == sorter) {
viewer.refresh();
} else {
viewer.setComparator(sorter);
}
}
}
protected abstract int doCompare(Viewer viewer, Object e1, Object e2);
}
private class MyContentProvider implements IStructuredContentProvider {
@Override
public void dispose() {
}
@Override
public Object[] getElements(final Object inputElement) {
return (Person[]) inputElement;
}
@Override
public void inputChanged(final Viewer viewer, final Object oldInput,
final Object newInput) {
}
}
public Snippet040TableViewerSorting(final Shell shell) {
final TableViewer v =
new TableViewer(shell, SWT.BORDER | SWT.FULL_SELECTION);
v.setContentProvider(new MyContentProvider());
final TableViewerColumn lineColumn = new TableViewerColumn(v, SWT.NONE);
lineColumn.getColumn().setMoveable(false);
lineColumn.getColumn().setWidth(20);
lineColumn.getColumn().setText("#");
lineColumn.setLabelProvider(new ColumnLabelProvider() {
@Override
public void update(final ViewerCell aCell) {
aCell.setText(Integer.toString(v.getTable().indexOf(
(TableItem) aCell.getItem()) + 1));
}
});
TableViewerColumn column = new TableViewerColumn(v, SWT.NONE);
column.getColumn().setWidth(200);
column.getColumn().setText("Givenname");
column.getColumn().setMoveable(true);
column.setLabelProvider(new ColumnLabelProvider() {
@Override
public String getText(final Object element) {
return ((Person) element).givenname;
}
});
column.setEditingSupport(new AbstractEditingSupport(v) {
@Override
protected void doSetValue(final Object element, final Object value) {
((Person) element).givenname = value.toString();
}
@Override
protected Object getValue(final Object element) {
return ((Person) element).givenname;
}
});
final ColumnViewerSorter cSorter = new ColumnViewerSorter(v, column) {
@Override
protected int doCompare(final Viewer viewer, final Object e1,
final Object e2) {
final Person p1 = (Person) e1;
final Person p2 = (Person) e2;
return p1.givenname.compareToIgnoreCase(p2.givenname);
}
};
column = new TableViewerColumn(v, SWT.NONE);
column.getColumn().setWidth(200);
column.getColumn().setText("Surname");
column.getColumn().setMoveable(true);
column.setLabelProvider(new ColumnLabelProvider() {
@Override
public String getText(final Object element) {
return ((Person) element).surname;
}
});
column.setEditingSupport(new AbstractEditingSupport(v) {
@Override
protected void doSetValue(final Object element, final Object value) {
((Person) element).surname = value.toString();
}
@Override
protected Object getValue(final Object element) {
return ((Person) element).surname;
}
});
new ColumnViewerSorter(v, column) {
@Override
protected int doCompare(final Viewer viewer, final Object e1,
final Object e2) {
final Person p1 = (Person) e1;
final Person p2 = (Person) e2;
return p1.surname.compareToIgnoreCase(p2.surname);
}
};
column = new TableViewerColumn(v, SWT.NONE);
column.getColumn().setWidth(200);
column.getColumn().setText("E-Mail");
column.getColumn().setMoveable(true);
column.setLabelProvider(new ColumnLabelProvider() {
@Override
public String getText(final Object element) {
return ((Person) element).email;
}
});
column.setEditingSupport(new AbstractEditingSupport(v) {
@Override
protected void doSetValue(final Object element, final Object value) {
((Person) element).email = value.toString();
}
@Override
protected Object getValue(final Object element) {
return ((Person) element).email;
}
});
new ColumnViewerSorter(v, column) {
@Override
protected int doCompare(final Viewer viewer, final Object e1,
final Object e2) {
final Person p1 = (Person) e1;
final Person p2 = (Person) e2;
return p1.email.compareToIgnoreCase(p2.email);
}
};
final Person[] model = createModel();
v.setInput(model);
v.getTable().setLinesVisible(true);
v.getTable().setHeaderVisible(true);
cSorter.setSorter(cSorter, ColumnViewerSorter.ASC);
}
/**
* @param args
*/
public static void main(final String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
new Snippet040TableViewerSorting(shell);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
private Person[] createModel() {
final Person[] elements = new Person[4];
elements[0] = new Person("Tom", "Schindl", "tom.schindl@bestsolution.at");
elements[1] = new Person("Boris", "Bokowski", "Boris_Bokowski@ca.ibm.com");
elements[2] = new Person("Tod", "Creasey", "Tod_Creasey@ca.ibm.com");
elements[3] = new Person("Wayne", "Beaton", "wayne@eclipse.org");
return elements;
}
} |
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