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Java library for creating text-based terminal GUIs

There is a newer version: 3.2.0-alpha1

/*
 * 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 .
 * 
 * Copyright (C) 2010-2020 Martin Berglund
 */
package com.googlecode.lanterna.gui2;

import com.googlecode.lanterna.graphics.ThemedTextGraphics;

/**
 * Classes implementing this interface can be used along with DefaultWindowManagerTextGUI to put some extra processing
 * after a window has been rendered. This is used for making window shadows but can be used for anything.
 * @see WindowShadowRenderer
 * @author Martin
 */
public interface WindowPostRenderer {
    /**
     * Called by DefaultWindowTextGUI immediately after a Window has been rendered, to let you do post-processing.
     * You will have a TextGraphics object that can draw to the whole screen, so you need to inspect the window's
     * position and decorated size to figure out where the bounds are
     * @param textGraphics Graphics object you can use to draw with
     * @param textGUI TextGUI that we are in
     * @param window Window that was just rendered
     */
    void postRender(
            ThemedTextGraphics textGraphics,
            TextGUI textGUI,
            Window window);
}