1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/samples/filebrowser.js Wed Apr 27 01:36:41 2016 +0800
1.3 @@ -0,0 +1,100 @@
1.4 +#// Usage: jjs -fx filebrowser.js -- <start_dir>
1.5 +
1.6 +/*
1.7 + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
1.8 + *
1.9 + * Redistribution and use in source and binary forms, with or without
1.10 + * modification, are permitted provided that the following conditions
1.11 + * are met:
1.12 + *
1.13 + * - Redistributions of source code must retain the above copyright
1.14 + * notice, this list of conditions and the following disclaimer.
1.15 + *
1.16 + * - Redistributions in binary form must reproduce the above copyright
1.17 + * notice, this list of conditions and the following disclaimer in the
1.18 + * documentation and/or other materials provided with the distribution.
1.19 + *
1.20 + * - Neither the name of Oracle nor the names of its
1.21 + * contributors may be used to endorse or promote products derived
1.22 + * from this software without specific prior written permission.
1.23 + *
1.24 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
1.25 + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
1.26 + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.27 + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
1.28 + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.29 + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.30 + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.31 + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.32 + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.33 + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.34 + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.35 + */
1.36 +
1.37 +// Uses -fx and javafx TreeView to visualize directories
1.38 +if (!$OPTIONS._fx) {
1.39 + print("Usage: jjs -fx filebrowser.js -- <start_dir>");
1.40 + exit(1);
1.41 +}
1.42 +
1.43 +// Java classes used
1.44 +var File = Java.type("java.io.File");
1.45 +var Files = Java.type("java.nio.file.Files");
1.46 +
1.47 +// check directory argument, if passed
1.48 +var dir = arguments.length > 0? new File(arguments[0]) : new File(".");
1.49 +if (! dir.isDirectory()) {
1.50 + print(dir + " is not a directory!");
1.51 + exit(2);
1.52 +}
1.53 +
1.54 +// JavaFX classes used
1.55 +var FXCollections = Java.type("javafx.collections.FXCollections");
1.56 +var Scene = Java.type("javafx.scene.Scene");
1.57 +var TreeItem = Java.type("javafx.scene.control.TreeItem");
1.58 +var TreeView = Java.type("javafx.scene.control.TreeView");
1.59 +
1.60 +// create a subclass of JavaFX TreeItem class
1.61 +var LazyTreeItem = Java.extend(TreeItem);
1.62 +
1.63 +// lazily filling children of a directory LazyTreeItem
1.64 +function buildChildren(dir) {
1.65 + var children = FXCollections.observableArrayList();
1.66 + var stream = Files.list(dir.toPath());
1.67 + stream.forEach(function(path) {
1.68 + var file = path.toFile();
1.69 + var item = file.isDirectory()?
1.70 + makeLazyTreeItem(file) : new TreeItem(file.name);
1.71 + children.add(item);
1.72 + });
1.73 + stream.close();
1.74 + return children;
1.75 +}
1.76 +
1.77 +// create an instance LazyTreeItem with override methods
1.78 +function makeLazyTreeItem(dir) {
1.79 + var item = new LazyTreeItem(dir.name) {
1.80 + expanded: false,
1.81 + isLeaf: function() false,
1.82 + getChildren: function() {
1.83 + if (! this.expanded) {
1.84 + // call super class (TreeItem) method
1.85 + Java.super(item).getChildren().setAll(buildChildren(dir));
1.86 + this.expanded = true;
1.87 + }
1.88 + // call super class (TreeItem) method
1.89 + return Java.super(item).getChildren();
1.90 + }
1.91 + }
1.92 + return item;
1.93 +}
1.94 +
1.95 +// JavaFX start method
1.96 +function start(stage) {
1.97 + stage.title = dir.absolutePath;
1.98 + var rootItem = makeLazyTreeItem(dir);
1.99 + rootItem.expanded = true;
1.100 + var tree = new TreeView(rootItem);
1.101 + stage.scene = new Scene(tree, 300, 450);
1.102 + stage.show();
1.103 +}
