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package de.fhswf.fbin.java2fx.trees;
import java.io.File;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.control.TreeItem;
import de.fhswf.fbin.java2fx.entities.FXFile;
import de.fhswf.fbin.java2fx.util.FileUtils;
public class DirectoryTreeItem extends TreeItem<FXFile>
{
private boolean isFirstTimeChildren = true;
private boolean isFirstTimeLeaf = true;
private boolean isLeaf;
private File[] subDirectories;
private static String separator = System.getProperty("file.separator");
private static boolean isRunningOnWindows = System.getProperty("os.name")
.toLowerCase().contains("windows");
public DirectoryTreeItem(File file)
{
super(new FXFile(file));
if (file == null)
// || (!separator.equals(file.getName()) && !file.isDirectory()))
throw new IllegalArgumentException("file is null or not a directory");
}
@Override
public boolean isLeaf()
{
if (isFirstTimeLeaf)
{
isFirstTimeLeaf = false;
isLeaf = getSubDirectories().length == 0;
}
return isLeaf;
}
@Override
public ObservableList<TreeItem<FXFile>> getChildren()
{
if (isFirstTimeChildren)
{
isFirstTimeChildren = false;
// First getChildren() call, so we actually go off and
// determine the children of the File contained in this TreeItem.
super.getChildren().setAll(buildChildren());
}
return super.getChildren();
}
private File[] getSubDirectories()
{
if (subDirectories == null)
{
FXFile dir = (FXFile) getValue();
System.out.println("\"" + dir.getName() + "\"");
if (isRunningOnWindows && parentProperty().getValue() == null)
{
dir.setName(separator);
subDirectories = File.listRoots();
System.out.println("windows detected");
}
else
{
subDirectories = dir.getFile().listFiles(f -> FileUtils.isPublicDirectory(f));
}
if (subDirectories == null)
{
System.out.println("oops, something went wrong for "
+ dir.getName());
subDirectories = new File[0];
}
}
return subDirectories;
}
private ObservableList<TreeItem<FXFile>> buildChildren()
{
ObservableList<TreeItem<FXFile>> children = FXCollections
.observableArrayList();
for (File subDirectory : getSubDirectories())
{
children.add(new DirectoryTreeItem(subDirectory));
}
return children;
}
}
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