From d46a9aa5ff10806a5baa8ad57b48e2a137e88d67 Mon Sep 17 00:00:00 2001
From: kske <kai@kske.dev>
Date: Wed, 11 Dec 2019 22:08:43 +0100
Subject: [PATCH] Implemented saving the last accessed file system path

When loading or saving a game file, the file chooser dialog opens inside
the directory that has been last accessed by the user. In case of no
previous access, the home directory is used instead.

Closes #14
---
 src/dev/kske/chess/ui/DialogUtil.java | 31 +++++++++++++++++++--------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/src/dev/kske/chess/ui/DialogUtil.java b/src/dev/kske/chess/ui/DialogUtil.java
index 0621666..b8dc9b1 100644
--- a/src/dev/kske/chess/ui/DialogUtil.java
+++ b/src/dev/kske/chess/ui/DialogUtil.java
@@ -9,6 +9,7 @@ import java.util.Collection;
 import java.util.List;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
+import java.util.prefs.Preferences;
 
 import javax.swing.DefaultComboBoxModel;
 import javax.swing.JComboBox;
@@ -32,22 +33,34 @@ public class DialogUtil {
 
 	private DialogUtil() {}
 
+	/**
+	 * Saves the last accessed folder for loading and saving game files.
+	 */
+	private static Preferences preferences = Preferences.userNodeForPackage(DialogUtil.class);
+
 	public static void showFileSelectionDialog(Component parent, Consumer<List<File>> action, Collection<FileNameExtensionFilter> filters) {
-		JFileChooser fileChooser = new JFileChooser();
-		fileChooser.setCurrentDirectory(new File(System.getProperty("user.home")));
-		fileChooser.setAcceptAllFileFilterUsed(false);
-		filters.forEach(fileChooser::addChoosableFileFilter);
-		if (fileChooser.showOpenDialog(parent) == JFileChooser.APPROVE_OPTION) action.accept(Arrays.asList(fileChooser.getSelectedFile()));
+		JFileChooser fileChooser = createFileChooser(filters);
+		if (fileChooser.showOpenDialog(parent) == JFileChooser.APPROVE_OPTION) {
+			action.accept(Arrays.asList(fileChooser.getSelectedFile()));
+			preferences.put("path", fileChooser.getSelectedFile().getParent());
+		}
 	}
 
 	public static void showFileSaveDialog(Component parent, Consumer<File> action, Collection<FileNameExtensionFilter> filters) {
+		JFileChooser fileChooser = createFileChooser(filters);
+		if (fileChooser.showSaveDialog(parent) == JFileChooser.APPROVE_OPTION) {
+			action.accept(new File(fileChooser.getSelectedFile().getAbsolutePath() + "."
+					+ ((FileNameExtensionFilter) fileChooser.getFileFilter()).getExtensions()[0]));
+			preferences.put("path", fileChooser.getSelectedFile().getParent());
+		}
+	}
+
+	private static JFileChooser createFileChooser(Collection<FileNameExtensionFilter> filters) {
 		JFileChooser fileChooser = new JFileChooser();
-		fileChooser.setCurrentDirectory(new File(System.getProperty("user.home")));
+		fileChooser.setCurrentDirectory(new File(preferences.get("path", System.getProperty("user.home"))));
 		fileChooser.setAcceptAllFileFilterUsed(false);
 		filters.forEach(fileChooser::addChoosableFileFilter);
-		if (fileChooser.showSaveDialog(parent) == JFileChooser.APPROVE_OPTION) action.accept(
-				new File(fileChooser.getSelectedFile().getAbsolutePath() + "."
-						+ ((FileNameExtensionFilter) fileChooser.getFileFilter()).getExtensions()[0]));
+		return fileChooser;
 	}
 
 	public static void showGameConfigurationDialog(Component parent, BiConsumer<String, String> action) {