/*
* This file is part of muCommander, http://www.mucommander.com
* Copyright (C) 2002-2016 Maxence Bernard
*
* muCommander 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.
*
* muCommander 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, see <http://www.gnu.org/licenses/>.
*/
package com.mucommander.ui.action.impl;
import java.util.Map;
import javax.swing.KeyStroke;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.TableColumnModelEvent;
import javax.swing.event.TableColumnModelListener;
import com.mucommander.ui.action.AbstractActionDescriptor;
import com.mucommander.ui.action.ActionCategory;
import com.mucommander.ui.action.MuAction;
import com.mucommander.ui.event.ActivePanelListener;
import com.mucommander.ui.main.FolderPanel;
import com.mucommander.ui.main.MainFrame;
import com.mucommander.ui.main.table.Column;
import com.mucommander.ui.main.table.FileTable;
/**
* This action sorts the currently active {@link com.mucommander.ui.main.table.FileTable} by a specified criterion.
* If the table is already sorted by this particular criterion when the action is performed, the sort order will be
* reversed.
*
* <p>This action is enabled only if the corresponding column is currently visible. This prevents this action from being
* performed when the column is not visible, which is an unsupported operation</p>.
*
* @author Maxence Bernard
*/
public abstract class SortByAction extends MuAction implements ActivePanelListener, TableColumnModelListener {
/** FileTable column this action operates on */
protected Column column;
public SortByAction(MainFrame mainFrame, Map<String,Object> properties, Column column) {
super(mainFrame, properties);
this.column = column;
mainFrame.addActivePanelListener(this);
mainFrame.getLeftPanel().getFileTable().getColumnModel().addColumnModelListener(this);
mainFrame.getRightPanel().getFileTable().getColumnModel().addColumnModelListener(this);
updateState(mainFrame.getActiveTable());
}
/**
* Updates this action's enable state, enabling this action if the corresponding column is visible and vice-versa.
*
* @param fileTable the FileTable this action currently operates on
*/
private void updateState(FileTable fileTable) {
setEnabled(fileTable.isColumnVisible(column));
}
/////////////////////////////
// MuAction implementation //
/////////////////////////////
@Override
public void performAction() {
mainFrame.getActiveTable().sortBy(column);
}
////////////////////////////////////////
// ActivePanelListener implementation //
////////////////////////////////////////
public void activePanelChanged(FolderPanel folderPanel) {
// Update this action's enabled state when the active panel has changed
updateState(folderPanel.getFileTable());
}
/////////////////////////////////////////////
// TableColumnModelListener implementation //
/////////////////////////////////////////////
public void columnAdded(TableColumnModelEvent event) {
// Enable this action when the corresponding column has been made visible
if(event.getFromIndex()==column.ordinal())
setEnabled(true);
}
public void columnRemoved(TableColumnModelEvent event) {
// Disable this action when the corresponding column has been made invisible
if(event.getFromIndex()==column.ordinal())
setEnabled(false);
}
public void columnMoved(TableColumnModelEvent event) {
}
public void columnMarginChanged(ChangeEvent event) {
}
public void columnSelectionChanged(ListSelectionEvent event) {
}
///////////////////
// Inner classes //
///////////////////
public static class Descriptor extends AbstractActionDescriptor {
private Column column;
private KeyStroke defaultKeyStroke;
public Descriptor(Column column, KeyStroke defaultKeyStroke) {
this.column = column;
this.defaultKeyStroke = defaultKeyStroke;
}
public String getId() { return column.getSortByColumnActionId(); }
public ActionCategory getCategory() { return ActionCategory.VIEW; }
public KeyStroke getDefaultAltKeyStroke() { return null; }
public KeyStroke getDefaultKeyStroke() { return defaultKeyStroke; }
}
}