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| import java.util.HashSet;
import java.util.Random;
import java.util.Set;
import org.eclipse.jface.layout.TableColumnLayout;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.Widget;
/**
* A simple TableViewer to demonstrate the usage of a standard content provider
* with a virtual table
*
* @author Tom Schindl <tom.schindl@bestsolution.at>
*
*/
public class Snippet029VirtualTableViewer {
public class MyModel {
public int counter;
public String presentation;
public MyModel(final int counter) {
this.counter = counter;
final Random r = new Random(System.currentTimeMillis());
final int randomNumber = r.nextInt(10);
if (randomNumber % 2 == 0) {
presentation = "Even";
} else {
presentation = "Odd";
}
}
}
private class MyContentProvider implements IStructuredContentProvider {
private MyModel[] elements;
/**
* {@inheritDoc}
*/
@Override
public void dispose() {
}
/**
* {@inheritDoc}
*/
@Override
public Object[] getElements(final Object inputElement) {
return elements;
}
/**
* {@inheritDoc}
*/
@Override
public void inputChanged(final Viewer viewer, final Object oldInput,
final Object newInput) {
this.elements = (MyModel[]) newInput;
}
}
private class MyFilter extends ViewerFilter {
/**
* Flag indicating if this filter is active.
*/
private boolean isActive;
/**
* The presentation to filter on.
*/
private final String presentationToTest;
/**
* Default constructor.
*
* @param pPresentation
*/
public MyFilter(final String pPresentation) {
presentationToTest = pPresentation;
isActive = true;
}
public boolean isActive() {
return isActive;
}
@Override
public boolean select(final Viewer viewer, final Object parentElement,
final Object element) {
boolean filtered = true;
if (isActive) {
if (element instanceof MyModel) {
filtered =
((MyModel) element).presentation.equals(presentationToTest);
}
}
return filtered;
}
public void setActive(final boolean pIsActive) {
this.isActive = pIsActive;
}
}
public Snippet029VirtualTableViewer(final Shell shell) {
final Composite composite = new Composite(shell, SWT.NONE);
final TableColumnLayout layout = new TableColumnLayout();
composite.setLayout(layout);
final TableViewer v = new TableViewer(composite, SWT.VIRTUAL);
v.setContentProvider(new MyContentProvider());
v.setUseHashlookup(true);
final MyModel[] model = createModel();
v.setInput(model);
final TableViewerColumn columnIndex = new TableViewerColumn(v, SWT.LEFT);
columnIndex.setLabelProvider(new ColumnLabelProvider() {
@Override
public String getText(final Object element) {
return "Item " + ((MyModel) element).counter;
}
});
layout.setColumnData(columnIndex.getColumn(), new ColumnWeightData(1));
final TableViewerColumn presentationIndex =
new TableViewerColumn(v, SWT.LEFT);
presentationIndex.setLabelProvider(new ColumnLabelProvider() {
@Override
public String getText(final Object element) {
return ((MyModel) element).presentation;
}
});
layout
.setColumnData(presentationIndex.getColumn(), new ColumnWeightData(2));
final Table table = v.getTable();
table.setLinesVisible(true);
final Set<String> presValues = new HashSet<String>();
for (final MyModel currentModel : model) {
presValues.add(currentModel.presentation);
}
final Shell popupShell = new Shell(shell, SWT.BORDER);
popupShell.setLayout(new GridLayout());
Button filterButton;
final MyFilter[] filters = new MyFilter[presValues.size()];
int index = 0;
for (final String presentation : presValues) {
filterButton = new Button(popupShell, SWT.CHECK);
filterButton.setText(presentation);
filterButton.setSelection(true);
final MyFilter currentFilter = new MyFilter(presentation);
filterButton.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(final SelectionEvent e) {
final Widget widget = e.widget;
if (widget instanceof Button) {
currentFilter.setActive(((Button) widget).getSelection());
}
}
});
filters[index] = currentFilter;
index++;
}
final Button applyButton = new Button(popupShell, SWT.NONE);
applyButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseDown(final MouseEvent e) {
if (!popupShell.isDisposed() && popupShell.isVisible()) {
boolean allActive = true;
for (final MyFilter filter : filters) {
allActive &= filter.isActive();
}
for (final ViewerFilter filter : v.getFilters()) {
v.removeFilter(filter);
}
if (!allActive) {
v.setFilters(filters);
}
popupShell.setVisible(false);
}
}
});
applyButton.setText("Apply Filters");
applyButton.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, true, true));
table.addMouseListener(new MouseAdapter() {
@Override
public void mouseDown(final MouseEvent e) {
if (e.button == 3) {
if (!popupShell.isDisposed()) {
if (popupShell.isVisible()) {
popupShell.setVisible(false);
}
popupShell.pack();
final Point cursorLocation =
popupShell.getDisplay().getCursorLocation();
popupShell
.setLocation(cursorLocation.x + 10, cursorLocation.y + 10);
popupShell.open();
}
}
}
});
}
/**
* @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 Snippet029VirtualTableViewer(shell);
shell.setSize(200, 800);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
private MyModel[] createModel() {
final MyModel[] elements = new MyModel[10000];
for (int i = 0; i < 10000; i++) {
elements[i] = new MyModel(i);
}
return elements;
}
} |
