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/*****************************************************************************
* Copyright (c) 2014 CEA LIST.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
* Benoit Maggi (CEA LIST) benoit.maggi@cea.fr - Refactor a generic StrategyEditor
*****************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.common.strategy;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.eclipse.core.databinding.observable.list.WritableList;
import org.eclipse.jface.viewers.ColumnViewerToolTipSupport;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TableLayout;
import org.eclipse.jface.window.ToolTip;
import org.eclipse.papyrus.infra.widgets.editors.MultipleReferenceEditor;
import org.eclipse.papyrus.infra.widgets.providers.IStaticContentProvider;
import org.eclipse.papyrus.infra.widgets.providers.StaticContentProvider;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.TreeEditor;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.TreeColumn;
import org.eclipse.swt.widgets.TreeItem;
// TODO : make drag&dropEditor extends it
public class StrategyEditor extends MultipleReferenceEditor {
private static final String STRATEGIES = "Strategies";
public static final int ACTIVATION_COLUMN = 0;
public static final int LABEL_COLUMN = 1;
protected /*final*/ Map<IStrategy, Button> checkboxes;
protected IStrategyManager instance;
public StrategyEditor(Composite parent, int style, IStrategyManager instance2) {
super(parent, style, true, true, STRATEGIES);
instance = instance2;
List<IStrategy> values = getStrategyManager().getAllStrategies();
IStaticContentProvider provider = new StaticContentProvider(values.toArray());
ColumnViewerToolTipSupport.enableFor(treeViewer, ToolTip.NO_RECREATE);
setProviders(provider, new StrategyLabelProvider(getStrategyManager()));// FIXME
setModelObservable(new StrategyObservableList(values));
TableLayout layout = new TableLayout();
new TreeColumn(tree, SWT.LEFT);
layout.addColumnData(new ColumnWeightData(10, 25, false));
new TreeColumn(tree, SWT.LEFT);
layout.addColumnData(new ColumnWeightData(100, 250, true));
tree.setLayout(layout);
tree.setHeaderVisible(false);
setToolTipText(STRATEGIES);
treeViewer.refresh();
//Adds a checkbox for each PasteStrategy, to toggle it
checkboxes = new HashMap<IStrategy, Button>();
for(TreeItem item : tree.getItems()) {
if(item.getData() instanceof IStrategy) {
TreeEditor editor = new TreeEditor(tree);
final Button button = new Button(tree, SWT.CHECK);
final TreeItem currentItem = item;
final IStrategy strategy = (IStrategy)currentItem.getData();
button.addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
updateStrategy(strategy, button);
treeViewer.refresh();
}
public void widgetDefaultSelected(SelectionEvent e) {
//Nothing
}
});
checkboxes.put(strategy, button);
button.setSelection(getStrategyManager().isActive(strategy));
editor.setEditor(button, item, ACTIVATION_COLUMN);
editor.horizontalAlignment = SWT.CENTER;
editor.grabHorizontal = true;
}
}
//Adds a space-key listener to edit a list of selected checkboxes
tree.addKeyListener(new KeyListener() {
public void keyReleased(KeyEvent e) {
if(e.keyCode == SWT.SPACE) {
ISelection selection = treeViewer.getSelection();
if(selection instanceof IStructuredSelection && !selection.isEmpty()) {
IStructuredSelection structuredSelection = (IStructuredSelection)selection;
Boolean isActive = findIsActive(structuredSelection);
Iterator<?> iterator = structuredSelection.iterator();
while(iterator.hasNext()) {
Object element = iterator.next();
if(element instanceof IStrategy) {
IStrategy strategy = (IStrategy)element;
Button button = checkboxes.get(strategy);
updateStrategy(strategy, button, isActive);
}
}
treeViewer.refresh();
}
}
}
public void keyPressed(KeyEvent e) {
//Nothing
}
});
}
public IStrategyManager getStrategyManager() {
return instance;
}
//Returns the new status of the first PasteStrategy in the selection.
//Returns null if the selection doesn't contain any PasteStrategy
private Boolean findIsActive(IStructuredSelection selection) {
Iterator<?> iterator = selection.iterator();
while(iterator.hasNext()) {
Object element = iterator.next();
if(element instanceof IStrategy) {
boolean isActive = getStrategyManager().isActive((IStrategy)element); //Current status
return !isActive; //New status (Toggle)
}
}
return null; //No PasteStrategy found in the selection
}
protected void updateStrategy(IStrategy strategy, Button button, boolean isActive) {
getStrategyManager().setActive((IStrategy) strategy, isActive);
button.setSelection(isActive);
}
protected void updateStrategy(IStrategy strategy, Button button) {
boolean isActive = getStrategyManager().isActive(strategy);
updateStrategy(strategy, button, !isActive);
}
@Override
public void createListControls() {
super.createListControls();
edit.dispose();
remove.dispose();
add.dispose();
up.dispose();
down.dispose();
// toggle = new Button(controlsSection, SWT.TOGGLE);
// toggle.setImage(org.eclipse.papyrus.infra.widgets.Activator.getDefault().getImage("/icons/Add_12x12.gif"));
// toggle.addSelectionListener(this);
// toggle.setToolTipText("Toggle the selected strategies");
treeViewer.addSelectionChangedListener(new ISelectionChangedListener() {
public void selectionChanged(SelectionChangedEvent event) {
updateControls();
}
});
}
protected Object[] getSelectedElements() {
IStructuredSelection selection = (IStructuredSelection)treeViewer.getSelection();
return selection.toArray();
}
@Override
public void widgetSelected(SelectionEvent event) {
// if(event.widget == toggle) {
// toggleAction(toggle.getSelection());
// } else {
super.widgetSelected(event);
// }
}
protected void toggleAction(boolean activate) {
Object[] selectedElements = getSelectedElements();
for(Object selected : selectedElements) {
if(selected instanceof IStrategy) {
getStrategyManager().setActive((IStrategy)selected, activate);
}
}
treeViewer.refresh();
}
@Override
protected void updateControls() {
//Skip super.updateControls ; this is not configurable. Avoids a widget disposed exception
}
/**
* Refreshes the widget's contents, based on the PasteStrategyManager's current values
*/
public void refresh() {
for(Map.Entry<IStrategy, Button> entry : checkboxes.entrySet()) {
boolean isActive = getStrategyManager().isActive(entry.getKey());
updateStrategy(entry.getKey(), entry.getValue(), isActive);
}
treeViewer.refresh();
}
private class StrategyObservableList extends WritableList {
public StrategyObservableList(List<IStrategy> values) {
super();
addAll(values);
}
@Override
public Object move(int oldIndex, int newIndex) {
Object objectToMove = get(oldIndex);
Object other = get(newIndex);
if(objectToMove instanceof IStrategy && other instanceof IStrategy) {
IStrategy strategyToMove = (IStrategy)objectToMove;
IStrategy otherStrategy = (IStrategy)other;
int priority = getStrategyManager().findPriority(otherStrategy);
int newPriority = (newIndex > oldIndex) ? priority + 1 : priority - 1;
getStrategyManager().setPriority(strategyToMove, newPriority);
}
return super.move(oldIndex, newIndex);
}
}
}
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