DMDirc-Plugins/ui_swing/src/main/java/com/dmdirc/addons/ui_swing/components/FontPicker.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;

import com.dmdirc.addons.ui_swing.UIUtilities;
import com.dmdirc.addons.ui_swing.components.renderers.FontListCellRenderer;
import com.dmdirc.events.eventbus.EventBus;

import com.google.common.collect.Lists;

import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.util.ArrayList;
import java.util.List;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.MutableComboBoxModel;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * System font picking component.
 */
public class FontPicker extends JComboBox<Object> {

    /** A version number for this class. */
    private static final long serialVersionUID = -9054812588033935839L;
    /** Font family to choose from. */
    private final String fontFamily;

    /**
     * Creates a new Font picker for the specified font family.
     *
     * @param eventBus   The event bus to post errors to
     * @param fontFamily Font family
     */
    public FontPicker(final EventBus eventBus, final String fontFamily) {
        super(new DefaultComboBoxModel<>());
        this.fontFamily = fontFamily;

        setRenderer(new FontListCellRenderer(getRenderer()));
        UIUtilities.invokeOffEDT(this::getFonts, this::loadFonts);
    }

    /**
     * Loads the fonts and adds them to the font picker.
     *
     * @param fonts Fonts to load
     */
    private void loadFonts(final List<String> fonts) {
        checkNotNull(fonts);
        final int size = getFont() == null ? 12 : getFont().getSize();
        for (final String font : fonts) {
            ((MutableComboBoxModel<Object>) getModel()).addElement(new Font(font, Font.PLAIN, size));
        }
        setSelectedItem(new Font(fontFamily, Font.PLAIN, size));
    }

    private List<String> getFonts() {
        final String[] fonts = GraphicsEnvironment.getLocalGraphicsEnvironment()
                .getAvailableFontFamilyNames();
        if (fonts == null) {
            return new ArrayList<>();
        }
        return Lists.newArrayList(fonts);
    }

}