/*
* This file is part of LibrePlan
*
* Copyright (C) 2009-2010 Fundación para o Fomento da Calidade Industrial e
* Desenvolvemento Tecnolóxico de Galicia
* Copyright (C) 2010-2011 Igalia, S.L.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.zkoss.ganttz;
import org.zkoss.ganttz.data.Position;
import org.zkoss.ganttz.data.Task;
import org.zkoss.ganttz.data.TaskContainer;
import org.zkoss.ganttz.extensions.IContext;
/**
* A predicate over {@link Task} elements checking if it is visible. A
* {@link Task} should visible if it fulfill a filter and its parent (if any) is
* expanded.
*
* @author Manuel Rego Casasnovas <mrego@igalia.com>
*/
public abstract class FilterAndParentExpandedPredicates implements IPredicate {
private final IContext<?> context;
private boolean filterContainers = false;
public FilterAndParentExpandedPredicates(IContext<?> context) {
this.context = context;
}
@Override
public boolean accepts(Object object) {
return accepts((Task) object);
}
private boolean accepts(Task task) {
boolean result = true;
if (filterContainers) {
result &= acceptsContainers(task);
} else {
result &= getParentExpandedPredicate().accepts(task);
}
return result && accpetsFilterPredicate(task);
}
public boolean acceptsContainers(Task task) {
if (filterContainers) {
if (task.isContainer()) {
return false;
}
}
return true;
}
public boolean accpetsFilterPredicateAndContainers(Task task) {
return acceptsContainers(task) && accpetsFilterPredicate(task);
}
public abstract boolean accpetsFilterPredicate(Task task);
private IPredicate getParentExpandedPredicate() {
return new IPredicate() {
@Override
public boolean accepts(Object object) {
return accepts((Task) object);
}
private boolean accepts(Task task) {
Position position = context.getMapper().findPositionFor(task);
if (position.isAtTop()) {
return true;
} else {
for (TaskContainer taskContainer : position.getAncestors()) {
if (!taskContainer.isExpanded()) {
return false;
}
}
return true;
}
}
};
}
public void setFilterContainers(boolean filterContainers) {
this.filterContainers = filterContainers;
}
public boolean isFilterContainers() {
return filterContainers;
}
}