src/jexer/TDirectoryList.java

   1 /*
   2  * Jexer - Java Text User Interface
   3  *
   4  * License: LGPLv3 or later
   5  *
   6  * This module is licensed under the GNU Lesser General Public License
   7  * Version 3.  Please see the file "COPYING" in this directory for more
   8  * information about the GNU Lesser General Public License Version 3.
   9  *
  10  *     Copyright (C) 2015  Kevin Lamonte
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU Lesser General Public License
  14  * as published by the Free Software Foundation; either version 3 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Lesser General Public
  23  * License along with this program; if not, see
  24  * http://www.gnu.org/licenses/, or write to the Free Software
  25  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  26  * 02110-1301 USA
  27  *
  28  * @author Kevin Lamonte [kevin.lamonte@gmail.com]
  29  * @version 1
  30  */
  31 package jexer;
  32
  33 import java.io.File;
  34 import java.util.ArrayList;
  35 import java.util.List;
  36
  37 /**
  38  * TDirectoryList shows the files within a directory.
  39  */
  40 public final class TDirectoryList extends TList {
  41
  42     /**
  43      * Files in the directory.
  44      */
  45     private List<File> files;
  46
  47     /**
  48      * Root path containing files to display.
  49      */
  50     private File path;
  51
  52     /**
  53      * Set the new path to display.
  54      *
  55      * @param path new path to list files for
  56      */
  57     public void setPath(final String path) {
  58         this.path = new File(path);
  59
  60         List<String> newStrings = new ArrayList<String>();
  61         files.clear();
  62
  63         // Build a list of files in this directory
  64         File [] newFiles = this.path.listFiles();
  65         if (newFiles != null) {
  66             for (int i = 0; i < newFiles.length; i++) {
  67                 if (newFiles[i].getName().startsWith(".")) {
  68                     continue;
  69                 }
  70                 if (newFiles[i].isDirectory()) {
  71                     continue;
  72                 }
  73                 files.add(newFiles[i]);
  74                 newStrings.add(renderFile(files.size() - 1));
  75             }
  76         }
  77         setList(newStrings);
  78     }
  79
  80     /**
  81      * Get the path that is being displayed.
  82      *
  83      * @return the path
  84      */
  85     public File getPath() {
  86         path = files.get(getSelectedIndex());
  87         return path;
  88     }
  89
  90     /**
  91      * Format one of the entries for drawing on the screen.
  92      *
  93      * @param index index into files
  94      * @return the line to draw
  95      */
  96     private String renderFile(final int index) {
  97         File file = files.get(index);
  98         String name = file.getName();
  99         if (name.length() > 20) {
 100             name = name.substring(0, 17) + "...";
 101         }
 102         return String.format("%-20s %5dk", name, (file.length() / 1024));
 103     }
 104
 105     /**
 106      * Public constructor.
 107      *
 108      * @param parent parent widget
 109      * @param path directory path, must be a directory
 110      * @param x column relative to parent
 111      * @param y row relative to parent
 112      * @param width width of text area
 113      * @param height height of text area
 114      */
 115     public TDirectoryList(final TWidget parent, final String path, final int x,
 116         final int y, final int width, final int height) {
 117
 118         this(parent, path, x, y, width, height, null);
 119     }
 120
 121     /**
 122      * Public constructor.
 123      *
 124      * @param parent parent widget
 125      * @param path directory path, must be a directory
 126      * @param x column relative to parent
 127      * @param y row relative to parent
 128      * @param width width of text area
 129      * @param height height of text area
 130      * @param action action to perform when an item is selected
 131      */
 132     public TDirectoryList(final TWidget parent, final String path, final int x,
 133         final int y, final int width, final int height, final TAction action) {
 134
 135         super(parent, null, x, y, width, height, action);
 136         files = new ArrayList<File>();
 137         setPath(path);
 138     }
 139
 140 }