org.marid.jfx.track.Tracks Maven / Gradle / Ivy

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/*
 * Copyright (c) 2016 Dmitry Ovchinnikov
 * Marid, the free data acquisition and visualization software
 *
 * 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 .
 */

package org.marid.jfx.track;

import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.scene.control.Control;
import javafx.scene.control.ScrollToEvent;
import javafx.scene.control.SelectionModel;

/**
 * @author Dmitry Ovchinnikov
 */
public interface Tracks {

    static  void track(Control control, ObservableList list, SelectionModel selectionModel) {
        control.getProperties().put("TRACK_SELECTION", true);
        if (!list.isEmpty()) {
            selectionModel.clearAndSelect(list.size() - 1);
        }
        selectionModel.selectedIndexProperty().addListener((observable, oldValue, newValue) -> {
            if (newValue.intValue() == list.size() - 1) {
                control.getProperties().replace("TRACK_SELECTION", false, true);
            } else {
                control.getProperties().replace("TRACK_SELECTION", true, false);
            }
        });
        list.addListener((ListChangeListener.Change c) -> {
            while (c.next()) {
                if (Boolean.TRUE.equals(control.getProperties().get("TRACK_SELECTION"))) {
                    if (!list.isEmpty()) {
                        final int row = list.size() - 1;
                        control.fireEvent(new ScrollToEvent<>(control, control, ScrollToEvent.scrollToTopIndex(), row));
                        selectionModel.clearAndSelect(row);
                    }
                }
            }
        });
    }
}