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Computers in vanilla Minecraft | TotalOS SDK
There is a newer version: 0.10.2b
/*
    Plugin for computers in vanilla minecraft!
    Copyright (C) 2022  JNNGL

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see .
 */

package com.jnngl.system;

import com.jnngl.totalcomputers.TotalComputers;
import com.jnngl.totalcomputers.system.TotalOS;
import com.jnngl.totalcomputers.system.desktop.ApplicationHandler;
import com.jnngl.totalcomputers.system.desktop.WindowApplication;
import com.jnngl.totalcomputers.system.ui.ElementList;

import java.awt.*;
import java.io.File;

public class FilesApplication extends WindowApplication {

    public FilesApplication(TotalOS os, String path, String[] args) {
        super(os, "Files", (int)(os.screenWidth * 0.66f), (int)(os.screenHeight * 0.66f), path);
        if(args.length > 1) {
            directory = args[1].replace("\\","/");
            File file = os.fs.toFile(directory.replace(new File(".").getAbsolutePath(), ""));
            contents.clear();
            contents.addEntries("<--");
            contents.addEntries(file.list());
            contents.unsetSelected();
            renderCanvas();
        }
        setMinWidth((int)(os.screenWidth * 0.33f));
        setMinHeight((int)(os.screenHeight * 0.33f));
    }

    public static void main(String[] args) {
        ApplicationHandler.open(FilesApplication.class, args[0], args);
    }

    private ElementList list, contents;
    private String directory = null;
    private int prevSelect = -1;

    @Override
    protected void onStart() {
        setIcon(os.fs.loadImage(applicationPath + "/icon.png"));
        final Font uiFont = os.baseFont.deriveFont((float) os.screenHeight / 128 * 3);
        contents = new ElementList(getWidth()/3, 0, getWidth()/3*2, getHeight(), uiFont);
        list = new ElementList(0, 0, getWidth()/3, getHeight(), uiFont, "Desktop", "Root");
        list.registerItemSelectEvent(() -> {
            contents.unsetSelected();
            String path = null;
            if(list.getSelectedElement().equals("Desktop")) {
                path = "/usr/Desktop";
            } else if(list.getSelectedElement().equals("Root")) {
                path = "/rootfs/"+os.name;
            }
            if(path == null) {
                directory = null;
            } else {
                File dir = os.fs.toFile(path);
                contents.clear();
                contents.addEntries("<--");
                contents.addEntries(dir.list());
                directory = path;
            }
            prevSelect = -1;
            renderCanvas();
        });
        contents.registerItemSelectEvent(() -> {
            if(prevSelect == contents.getSelectedIndex()) {
                File file = os.fs.toFile(directory);
                if(prevSelect == 0) {
                    String[] parts = directory.split("/");
                    directory = directory.replaceAll('/'+parts[parts.length-1]+'$', "");
                    if(directory.equals("")) directory = "/rootfs/"+os.name;
                    if(directory.contains("/rootfs") && !directory.contains(os.name)) directory = "/rootfs/"+os.name;
                    file = os.fs.toFile(directory);
                } else {
                    list.unsetSelected();
                    String dir = directory + "/" + contents.getSelectedElement();
                    File temp = os.fs.toFile(dir);
                    if(temp.isDirectory()) {
                        directory = dir;
                        file = temp;
                    }
                    else {
                        os.fs.executeFile(os.fs.toFile(dir));
                    }
                }
                contents.clear();
                contents.addEntries("<--");
                contents.addEntries(file.list());
                contents.unsetSelected();
            }
            prevSelect = contents.getSelectedIndex();
            renderCanvas();
        });

        list.registerScrollEvent(this::renderCanvas);
        contents.registerScrollEvent(this::renderCanvas);
        updateLayout();
        addResizeEvent(new ResizeEvent() {
            @Override
            public void onResize(int width, int height) {
                updateLayout();
                renderCanvas();
            }

            @Override
            public void onMaximize(int width, int height) {
                updateLayout();
                renderCanvas();
            }

            @Override
            public void onUnmaximize(int width, int height) {
                updateLayout();
                renderCanvas();
            }
        });
    }

    @Override
    protected boolean onClose() {
        return true;
    }

    @Override
    public void update() {

    }

    @Override
    public void render(Graphics2D g) {
        g.setColor(Color.WHITE);
        g.fillRect(0, 0, getWidth(), getHeight());
        list.render(g);
        contents.render(g);
    }

    @Override
    public void processInput(int x, int y, TotalComputers.InputInfo.InteractType type) {
        list.processInput(x, y, type);
        contents.processInput(x, y, type);
    }

    public void updateLayout() {
        list.setWidth(getWidth()/3);
        list.setHeight(getHeight());
        contents.setX(getWidth()/3);
        contents.setWidth(getWidth()/3*2);
        contents.setHeight(getHeight());
    }
}