/*
* Copyright 2016 MovingBlocks
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.terasology.rendering.dag;
import com.google.common.collect.Lists;
import org.terasology.registry.In;
import org.terasology.rendering.world.WorldRenderer;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.List;
import java.util.function.Supplier;
/**
* TODO: Add javadocs
*/
public abstract class ConditionDependentNode extends AbstractNode implements PropertyChangeListener {
private List<Supplier<Boolean>> conditions = Lists.newArrayList();
@In
private WorldRenderer worldRenderer;
protected void requiresCondition(Supplier<Boolean> condition) {
conditions.add(condition);
checkConditions(); // TODO: better to remove this in near feature
}
private boolean checkConditions() {
boolean conditionsAreSatisfied = true;
for (Supplier<Boolean> condition : conditions) {
conditionsAreSatisfied = conditionsAreSatisfied && condition.get();
}
if (conditionsAreSatisfied != isEnabled()) {
setEnabled(conditionsAreSatisfied);
// enabling/disabling here means we cannot enable/disable nodes directly:
// we must always go through the settings.
return true;
} else {
return false;
}
}
@Override
public void propertyChange(PropertyChangeEvent evt) {
boolean conditionsChanged = checkConditions();
if (conditionsChanged) {
worldRenderer.requestTaskListRefresh();
}
}
}