/*
GanttProject is an opensource project management tool.
Copyright (C) 2005-2011 GanttProject Team
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package net.sourceforge.ganttproject.action.scroll;
import java.awt.event.ActionEvent;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import net.sourceforge.ganttproject.action.GPAction;
import net.sourceforge.ganttproject.chart.TimelineChart;
import net.sourceforge.ganttproject.gui.UIFacade;
import net.sourceforge.ganttproject.task.Task;
import net.sourceforge.ganttproject.task.TaskSelectionManager;
public class ScrollToSelectionAction extends GPAction implements TaskSelectionManager.Listener {
private final TimelineChart myChart;
private List<Task> mySelectedTasks;
public ScrollToSelectionAction(UIFacade uiFacade, TimelineChart chart) {
super("scroll.selection");
myChart = chart;
mySelectedTasks = Collections.emptyList();
uiFacade.getTaskSelectionManager().addSelectionListener(this);
}
@Override
public void actionPerformed(ActionEvent e) {
if (mySelectedTasks.isEmpty()) {
return;
}
Date earliestStartDate = null;
for (Task selectedTask : mySelectedTasks) {
if (earliestStartDate == null || earliestStartDate.after(selectedTask.getStart().getTime())) {
earliestStartDate = selectedTask.getStart().getTime();
}
}
myChart.setStartDate(earliestStartDate);
}
@Override
public void selectionChanged(List<Task> currentSelection) {
mySelectedTasks = currentSelection;
setEnabled(!currentSelection.isEmpty());
}
@Override
public void userInputConsumerChanged(Object newConsumer) {
}
}