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/*******************************************************************************
* Copyright (c) 2011 Wind River Systems, Inc. and others. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.ui.trees;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.tcf.te.ui.activator.UIPlugin;
import org.eclipse.tcf.te.ui.interfaces.ImageConsts;
import org.eclipse.tcf.te.ui.nls.Messages;
import org.eclipse.ui.dialogs.ListSelectionDialog;
/**
* The action to configure the filters of a tree viewer.
*
*/
public class ConfigFilterAction extends Action {
// The tree control whose filters are to be configured.
private AbstractTreeControl treeControl;
/**
* Create an instance for the specified tree control.
*
* @param treeControl The tree control to be configured.
*/
public ConfigFilterAction(AbstractTreeControl treeControl) {
super(null, AS_PUSH_BUTTON);
this.treeControl = treeControl;
this.setToolTipText(Messages.ConfigFilterAction_TooltipText);
ImageDescriptor image = UIPlugin.getImageDescriptor(ImageConsts.VIEWER_FILTER_CONFIG_ENABLED);
setImageDescriptor(image);
image = UIPlugin.getImageDescriptor(ImageConsts.VIEWER_FILTER_CONFIG_DISABLED);
setDisabledImageDescriptor(image);
updateEnablement();
}
/*
* (non-Javadoc)
* @see org.eclipse.jface.action.Action#run()
*/
@Override
public void run() {
FilterDescriptor[] filterDescriptors = getVisibleFilters();
if (filterDescriptors == null || filterDescriptors.length == 0) return;
ILabelProvider filterLabelProvider = createFilterLabelProvider();
Shell parent = treeControl.getViewer().getControl().getShell();
String message = Messages.ConfigFilterAction_PromptMessage;
ListSelectionDialog dialog = new ListSelectionDialog(parent, filterDescriptors, ArrayContentProvider.getInstance(), filterLabelProvider, message);
dialog.setTitle(Messages.ConfigFilterAction_Title);
List<FilterDescriptor> initialSelection = new ArrayList<FilterDescriptor>();
for (FilterDescriptor descriptor : filterDescriptors) {
if (descriptor.isEnabled()) {
initialSelection.add(descriptor);
}
}
dialog.setInitialElementSelections(initialSelection);
if (dialog.open() == Window.OK) {
Object[] elements = dialog.getResult();
for (FilterDescriptor descriptor : filterDescriptors) {
if (descriptor.isVisible()) {
descriptor.setEnabled(false);
}
}
for (Object element : elements) {
if (element instanceof FilterDescriptor) {
FilterDescriptor descriptor = (FilterDescriptor) element;
descriptor.setEnabled(true);
}
}
treeControl.updateFilters();
treeControl.updateFilterState();
}
}
/**
* Get currently visible filter descriptors.
*
* @return Currently visible filter descriptors.
*/
private FilterDescriptor[] getVisibleFilters() {
FilterDescriptor[] filterDescriptors = treeControl.getFilterDescriptors();
if (filterDescriptors != null && filterDescriptors.length > 0) {
List<FilterDescriptor> visibleList = new ArrayList<FilterDescriptor>();
for (FilterDescriptor filterDescriptor : filterDescriptors) {
if (filterDescriptor.isVisible()) {
visibleList.add(filterDescriptor);
}
}
return visibleList.toArray(new FilterDescriptor[visibleList.size()]);
}
return null;
}
/**
* Create a label provider for the configure dialog's tree.
*
* @return The label provider.
*/
private ILabelProvider createFilterLabelProvider() {
return new LabelProvider() {
@Override
public String getText(Object element) {
if (element instanceof FilterDescriptor) {
return ((FilterDescriptor) element).getName();
}
return super.getText(element);
}
@Override
public Image getImage(Object element) {
if (element instanceof FilterDescriptor) {
return ((FilterDescriptor) element).getImage();
}
return super.getImage(element);
}
};
}
/**
* Update the enablement of this action. If there is any visible filter in the
* tree control, then enable this action. Or else disable it.
*/
public void updateEnablement() {
FilterDescriptor[] filterDescriptors = treeControl.getFilterDescriptors();
boolean enabled = false;
if(filterDescriptors != null && filterDescriptors.length > 0) {
for(FilterDescriptor filterDescriptor : filterDescriptors) {
if(filterDescriptor.isVisible()) {
enabled = true;
break;
}
}
}
setEnabled(enabled);
}
}
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