src/main/java/org/apache/log4j/chainsaw/logui/LogUiReceiversPanel.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to you 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.apache.log4j.chainsaw.logui;

import java.util.List;
import javax.swing.*;
import org.apache.log4j.chainsaw.ApplicationPreferenceModel;
import org.apache.log4j.chainsaw.ChainsawStatusBar;
import org.apache.log4j.chainsaw.prefs.SettingsManager;
import org.apache.log4j.chainsaw.receiver.ChainsawReceiver;
import org.apache.log4j.chainsaw.receivers.ReceiversPanel;

public class LogUiReceiversPanel {

    private ReceiversPanel receiversPanel;
    private JSplitPane mainReceiverSplitPane;

    private int dividerSize;
    private static final double DEFAULT_MAIN_RECEIVER_SPLIT_LOCATION = 0.85d;
    private double lastMainReceiverSplitLocation = DEFAULT_MAIN_RECEIVER_SPLIT_LOCATION;

    public LogUiReceiversPanel(
            SettingsManager settingsManager,
            ApplicationPreferenceModel applicationPreferenceModel,
            List<ChainsawReceiver> receivers,
            LogUI logUI,
            ChainsawStatusBar statusBar,
            JPanel panePanel) {
        receiversPanel = new ReceiversPanel(settingsManager, receivers, logUI, statusBar);
        mainReceiverSplitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, panePanel, receiversPanel);
        mainReceiverSplitPane.setContinuousLayout(true);
        dividerSize = mainReceiverSplitPane.getDividerSize();
        mainReceiverSplitPane.setDividerLocation(-1);
        mainReceiverSplitPane.setResizeWeight(1.0);

        boolean showReceivers = applicationPreferenceModel.isReceiversVisible();

        applicationPreferenceModel.addEventListener(evt -> {
            if (evt.getPropertyName().equals(ApplicationPreferenceModel.RECEIVERS_VISIBLE)) {
                boolean value = (Boolean) evt.getPropertyValue();
                if (value) {
                    showReceiverPanel();
                } else {
                    hideReceiverPanel();
                }
            }
        });

        if (showReceivers) {
            showReceiverPanel();
        } else {
            hideReceiverPanel();
        }
    }

    public JSplitPane getMainReceiverSplitPane() {
        return mainReceiverSplitPane;
    }

    /**
     * Display the log tree pane, using the last known divider location
     */
    public void showReceiverPanel() {
        mainReceiverSplitPane.setDividerSize(dividerSize);
        mainReceiverSplitPane.setDividerLocation(lastMainReceiverSplitLocation);
        receiversPanel.setVisible(true);
        mainReceiverSplitPane.repaint();
    }

    /**
     * Hide the log tree pane, holding the current divider location for later use
     */
    public void hideReceiverPanel() {
        // subtract one to make sizes match
        int currentSize = mainReceiverSplitPane.getWidth() - mainReceiverSplitPane.getDividerSize();
        if (mainReceiverSplitPane.getDividerLocation() > -1) {
            if (!(((mainReceiverSplitPane.getDividerLocation() + 1) == currentSize)
                    || ((mainReceiverSplitPane.getDividerLocation() - 1) == 0))) {
                lastMainReceiverSplitLocation = ((double) mainReceiverSplitPane.getDividerLocation() / currentSize);
            }
        }
        mainReceiverSplitPane.setDividerSize(0);
        receiversPanel.setVisible(false);
        mainReceiverSplitPane.repaint();
    }
}