Mercurial > jdk8-mips64-public > nashorn / file comparison
comparison: samples/filebrowser.js
samples/filebrowser.js
- changeset 864
- 3f7d86480ce5
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- b1a7da25b547
- child 962
- ac62e33a99b0
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| 860:046bf6509a1f | 864:3f7d86480ce5 |
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| 1 #// Usage: jjs -fx filebrowser.js -- <start_dir> | |
| 2 | |
| 3 /* | |
| 4 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions | |
| 8 * are met: | |
| 9 * | |
| 10 * - Redistributions of source code must retain the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer. | |
| 12 * | |
| 13 * - Redistributions in binary form must reproduce the above copyright | |
| 14 * notice, this list of conditions and the following disclaimer in the | |
| 15 * documentation and/or other materials provided with the distribution. | |
| 16 * | |
| 17 * - Neither the name of Oracle nor the names of its | |
| 18 * contributors may be used to endorse or promote products derived | |
| 19 * from this software without specific prior written permission. | |
| 20 * | |
| 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS | |
| 22 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
| 23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
| 25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 28 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 32 */ | |
| 33 | |
| 34 // Uses -fx and javafx TreeView to visualize directories | |
| 35 if (!$OPTIONS._fx) { | |
| 36 print("Usage: jjs -fx filebrowser.js -- <start_dir>"); | |
| 37 exit(1); | |
| 38 } | |
| 39 | |
| 40 // Java classes used | |
| 41 var File = Java.type("java.io.File"); | |
| 42 var Files = Java.type("java.nio.file.Files"); | |
| 43 | |
| 44 // check directory argument, if passed | |
| 45 var dir = arguments.length > 0? new File(arguments[0]) : new File("."); | |
| 46 if (! dir.isDirectory()) { | |
| 47 print(dir + " is not a directory!"); | |
| 48 exit(2); | |
| 49 } | |
| 50 | |
| 51 // JavaFX classes used | |
| 52 var FXCollections = Java.type("javafx.collections.FXCollections"); | |
| 53 var Scene = Java.type("javafx.scene.Scene"); | |
| 54 var TreeItem = Java.type("javafx.scene.control.TreeItem"); | |
| 55 var TreeView = Java.type("javafx.scene.control.TreeView"); | |
| 56 | |
| 57 // create a subclass of JavaFX TreeItem class | |
| 58 var LazyTreeItem = Java.extend(TreeItem); | |
| 59 | |
| 60 // lazily filling children of a directory LazyTreeItem | |
| 61 function buildChildren(dir) { | |
| 62 var children = FXCollections.observableArrayList(); | |
| 63 var stream = Files.list(dir.toPath()); | |
| 64 stream.forEach(function(path) { | |
| 65 var file = path.toFile(); | |
| 66 var item = file.isDirectory()? | |
| 67 makeLazyTreeItem(file) : new TreeItem(file.name); | |
| 68 children.add(item); | |
| 69 }); | |
| 70 stream.close(); | |
| 71 return children; | |
| 72 } | |
| 73 | |
| 74 // create an instance LazyTreeItem with override methods | |
| 75 function makeLazyTreeItem(dir) { | |
| 76 var item = new LazyTreeItem(dir.name) { | |
| 77 expanded: false, | |
| 78 isLeaf: function() false, | |
| 79 getChildren: function() { | |
| 80 if (! this.expanded) { | |
| 81 // call super class (TreeItem) method | |
| 82 Java.super(item).getChildren().setAll(buildChildren(dir)); | |
| 83 this.expanded = true; | |
| 84 } | |
| 85 // call super class (TreeItem) method | |
| 86 return Java.super(item).getChildren(); | |
| 87 } | |
| 88 } | |
| 89 return item; | |
| 90 } | |
| 91 | |
| 92 // JavaFX start method | |
| 93 function start(stage) { | |
| 94 stage.title = dir.absolutePath; | |
| 95 var rootItem = makeLazyTreeItem(dir); | |
| 96 rootItem.expanded = true; | |
| 97 var tree = new TreeView(rootItem); | |
| 98 stage.scene = new Scene(tree, 300, 450); | |
| 99 stage.show(); | |
| 100 } |
