/*
* Copyright 2010 Ronnie Kolehmainen
*
* 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 com.googlecode.cssxfire.action;
import com.googlecode.cssxfire.IncomingChangesComponent;
import com.intellij.openapi.actionSystem.AnActionEvent;
/**
* Created by IntelliJ IDEA.
* User: Ronnie
*/
public abstract class Navigate extends AbstractIncomingChangesAction
{
/**
* For subclasses to implement. A positive value means forward (next) and a negative
* value means back (previous).
* @return an integer describing the direction
*/
protected abstract int getDirection();
@Override
public void update(AnActionEvent event)
{
IncomingChangesComponent changesComponent = getIncomingChangesComponent(event);
if (changesComponent == null)
{
return;
}
event.getPresentation().setEnabled(changesComponent.getTreeViewModel().canSelect(getDirection()));
}
@Override
public void actionPerformed(AnActionEvent event)
{
IncomingChangesComponent changesComponent = getIncomingChangesComponent(event);
if (changesComponent == null)
{
return;
}
changesComponent.getTreeViewModel().select(getDirection());
}
}