DMDirc-Plugins/ui_swing/src/main/java/com/dmdirc/addons/ui_swing/components/statusbar/SwingStatusBar.java

/*
 * Copyright (c) 2006-2017 DMDirc Developers
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
 * OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.dmdirc.addons.ui_swing.components.statusbar;

import com.dmdirc.events.StatusBarComponentAddedEvent;
import com.dmdirc.events.StatusBarComponentRemovedEvent;

import com.google.common.base.Preconditions;

import java.awt.Component;
import java.util.Arrays;

import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

import net.miginfocom.layout.PlatformDefaults;
import net.miginfocom.swing.MigLayout;

import net.engio.mbassy.listener.Handler;

import static com.dmdirc.addons.ui_swing.SwingPreconditions.checkOnEDT;

/** Status bar, shows message and info on the GUI. */
public class SwingStatusBar extends JPanel {

    /** A version number for this class. */
    private static final long serialVersionUID = 5;
    /** Mig layout component restraints. */
    private final String componentConstraints;
    /** error panel. */
    private final ErrorPanel errorLabel;
    /** update label. */
    private final UpdaterLabel updaterLabel;
    /** Invite label. */
    private final InviteLabel inviteLabel;

    /**
     * Creates a new instance of SwingStatusBar.
     *
     * @param inviteLabel  The invite label to add to the status bar.
     * @param updaterLabel The updater label to add to the status bar.
     * @param errorLabel   The error label to add to the status bar.
     * @param messageLabel The message label to add to the status bar.
     */
    public SwingStatusBar(
            final InviteLabel inviteLabel,
            final UpdaterLabel updaterLabel,
            final ErrorPanel errorLabel,
            final MessageLabel messageLabel) {
        checkOnEDT();

        final int height = getFontMetrics(UIManager.getFont("Label.font")).getHeight()
                + (int) PlatformDefaults.getUnitValueY("related").getValue();
        componentConstraints = "sgy components, hmax " + height + ", hmin " + height
                + ", wmin 20, shrink 0";

        this.errorLabel = errorLabel;
        this.updaterLabel = updaterLabel;
        this.inviteLabel = inviteLabel;

        inviteLabel.init();

        setLayout(new MigLayout("fill, ins 0, hidemode 3"));

        add(messageLabel, "grow, push, sgy components, hmax " + height
                + ", hmin " + height);
        add(updaterLabel, componentConstraints);
        add(errorLabel, componentConstraints);
        add(inviteLabel, componentConstraints);
    }

    @Handler
    public void addComponent(final StatusBarComponentAddedEvent event) {
        Preconditions.checkArgument(event.getComponent() instanceof Component,
                "Error adding status bar component, " +
                        "component must be an instance of java.awt.component");
        if (!Arrays.asList(getComponents()).contains(event.getComponent())) {
            SwingUtilities.invokeLater(() -> {
                remove(updaterLabel);
                remove(errorLabel);
                remove(inviteLabel);
                add((Component) event.getComponent(), componentConstraints);
                add(updaterLabel, componentConstraints);
                add(inviteLabel, componentConstraints);
                add(errorLabel, componentConstraints);
                validate();
            });
        }
    }

    @Handler
    public void removeComponent(final StatusBarComponentRemovedEvent event) {
        Preconditions.checkArgument(event.getComponent() instanceof Component,
                "Error removing status bar component" +
                        "component must be an instance of java.awt.component");
        SwingUtilities.invokeLater(() -> {
            remove((Component) event.getComponent());
            validate();
        });
    }
}