LineWrappingLabelTest.java

/*
 * This file is part of lanterna (http://code.google.com/p/lanterna/).
 *
 * lanterna is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Copyright (C) 2010-2017 Martin Berglund
 */
package com.googlecode.lanterna.gui2;

import com.googlecode.lanterna.TerminalSize;
import com.googlecode.lanterna.TextColor;
import com.googlecode.lanterna.input.KeyStroke;
import com.googlecode.lanterna.screen.Screen;

import java.io.IOException;

public class LineWrappingLabelTest extends TestBase {
    public static final String BIG_TEXT =
            "                   GNU LESSER GENERAL PUBLIC LICENSE\n" +
            "                       Version 3, 29 June 2007\n" +
            "\n" +
            " Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>\n" +
            " Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.\n" +
            "\n" +
            "\n" +
            "  This version of the GNU Lesser General Public License incorporates the terms and conditions of version 3 of the GNU General Public License, supplemented by the additional permissions listed below.\n" +
            "\n" +
            "  0. Additional Definitions.\n" +
            "\n" +
            "  As used herein, \"this License\" refers to version 3 of the GNU Lesser General Public License, and the \"GNU GPL\" refers to version 3 of the GNU General Public License.\n" +
            "\n" +
            "  \"The Library\" refers to a covered work governed by this License, other than an Application or a Combined Work as defined below.";

    public static void main(String[] args) throws IOException, InterruptedException {
        new LineWrappingLabelTest().run(args);
    }

    private TerminalSize windowSize;

    public LineWrappingLabelTest() {
        windowSize = new TerminalSize(70, 15);
    }

    @Override
    protected MultiWindowTextGUI createTextGUI(Screen screen) {
        return new MultiWindowTextGUI(
                new SeparateTextGUIThread.Factory(),
                screen,
                new MyWindowManager(),
                new WindowShadowRenderer(),
                new EmptySpace(TextColor.ANSI.BLUE));
    }

    @Override
    public void init(WindowBasedTextGUI textGUI) {
        final BasicWindow window = new BasicWindow("Wrapping label test");
        Panel contentPane = new Panel();
        contentPane.setLayoutManager(new BorderLayout());
        contentPane.addComponent(new Label("Resize window by holding ctrl and pressing arrow keys").setLayoutData(BorderLayout.Location.TOP));
        contentPane.addComponent(new Label(BIG_TEXT).withBorder(Borders.doubleLine()).setLayoutData(BorderLayout.Location.CENTER));
        contentPane.addComponent(new Button("Close", new Runnable() {
                    @Override
                    public void run() {
                        window.close();
                    }
                }).setLayoutData(BorderLayout.Location.BOTTOM));

        window.setComponent(contentPane);

        textGUI.addListener(new TextGUI.Listener() {
            @Override
            public boolean onUnhandledKeyStroke(TextGUI textGUI, KeyStroke keyStroke) {
                if(keyStroke.isCtrlDown()) {
                    switch(keyStroke.getKeyType()) {
                        case ArrowUp:
                            if(windowSize.getRows() > 1) {
                                windowSize = windowSize.withRelativeRows(-1);
                                return true;
                            }
                        case ArrowDown:
                            windowSize = windowSize.withRelativeRows(1);
                            return true;
                        case ArrowLeft:
                            if(windowSize.getColumns() > 1) {
                                windowSize = windowSize.withRelativeColumns(-1);
                                return true;
                            }
                        case ArrowRight:
                            windowSize = windowSize.withRelativeColumns(1);
                            return true;
                        default:
                    }
                }
                return false;
            }
        });

        textGUI.addWindow(window);
    }

    private class MyWindowManager extends DefaultWindowManager {
        @Override
        protected void prepareWindow(TerminalSize screenSize, Window window) {
            super.prepareWindow(screenSize, window);
            window.setDecoratedSize(getWindowDecorationRenderer(window).getDecoratedSize(window, windowSize));
        }
    }
}