Added Button for File-Open-Dialog

src/main/java/de/tuDortmund/cs/rvs/pingger/korrekturHelper/KorrekturHelper.java

@@ -301,14 +301,15 @@ public class KorrekturHelper
 
 	private final JButton btn_toClipboard;
 
+	private final JPanel contentPanel, menuPanel;
 	private String currentHtml = "";
 	/** The JFrame for this {@link KorrekturHelper} */
 	public final JFrame frm;
-	private final HtmlContext hc;
+
+	private HtmlContext hc;
 
 	private boolean inReset = false;
-
-	private final LinkedHashSet<Node> nodes;
+	private LinkedHashSet<Node> nodes;
 
 	/**
 	 * @param nodes Nodes
@@ -316,16 +317,13 @@ public class KorrekturHelper
 	 */
 	public KorrekturHelper(LinkedHashSet<Node> nodes, HtmlContext hc)
 	{
-
-		this.nodes = nodes;
-		this.hc = hc;
 		frm = new JFrame("Pinggers Korrektur Helper");
 		frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-		var contentPanel = new JPanel(new BorderLayout(), true);
+		contentPanel = new JPanel(new BorderLayout(), true);
 		/*
 		 * Menu Panel
 		 */
-		var menuPanel = new JPanel(true);
+		menuPanel = new JPanel(true);
 		menuPanel.setLayout(new BoxLayout(menuPanel, BoxLayout.X_AXIS));
 
 		var jtb_aot = new JToggleButton("Always on Top");
@@ -339,28 +337,20 @@ public class KorrekturHelper
 		btn_toClipboard = new JButton("Copy to Clipboard");
 		btn_toClipboard.addActionListener(e -> copyToClipboard());
 		menuPanel.add(btn_toClipboard);
+		var btn_drop = new JButton("Open Schema");
+		btn_drop.addActionListener(e -> fileDialog());
+		menuPanel.add(btn_drop);
 		var btn_reset = new JButton("Reset");
 		btn_reset.addActionListener(e -> reset());
 		menuPanel.add(btn_reset);
 		contentPanel.add(menuPanel, BorderLayout.NORTH);
-
-		/*
-		 * Node-Panel with Scrollpane
-		 */
-		var panel = new JPanel(true);
-		panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
-		var jsp = new JScrollPane(panel);
-		jsp.getVerticalScrollBar().setUnitIncrement(16);
-		Consumer<Node> c = n -> verifyClipboard();
-		for (var n : nodes)
-		{
-			n.addChangeListener(c);
-			panel.add(n.getComponent());
-		}
-		contentPanel.add(jsp, BorderLayout.CENTER);
-
+		setNodes(nodes, hc);
 		frm.setContentPane(contentPanel);
 		frm.pack();
+		if (frm.getHeight() > 900)
+		{
+			frm.setSize(frm.getWidth(), 900);
+		}
 	}
 
 	/**
@@ -384,6 +374,29 @@ public class KorrekturHelper
 		btn_toClipboard.setBackground(Color.GREEN);
 	}
 
+	private void fileDialog()
+	{
+		var x = new JFileChooser();
+		if (x.showOpenDialog(frm) == JFileChooser.APPROVE_OPTION)
+		{
+			var f = x.getSelectedFile();
+			try (
+					var in = new FileInputStream(f);
+					var isr = new InputStreamReader(in, StandardCharsets.UTF_8);
+					var br = new BufferedReader(isr, 1024 * 1024)
+			)
+			{
+				var hc = new HtmlContext();
+				var n = parseSchema(br, hc);
+				setNodes(n, hc);
+			}
+			catch (IOException e)
+			{
+				e.printStackTrace();
+			}
+		}
+	}
+
 	/**
 	 * Resets the Input Mask
 	 */
@@ -395,6 +408,34 @@ public class KorrekturHelper
 		verifyClipboard();
 	}
 
+	/**
+	 * Set the Nodes and {@link HtmlContext}
+	 *
+	 * @param nodes nodes
+	 * @param hc    context
+	 */
+	public void setNodes(LinkedHashSet<Node> nodes, HtmlContext hc)
+	{
+		this.nodes = nodes;
+		this.hc = hc;
+		/*
+		 * Node-Panel with Scrollpane
+		 */
+		var panel = new JPanel(true);
+		panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
+		var jsp = new JScrollPane(panel);
+		jsp.getVerticalScrollBar().setUnitIncrement(16);
+		Consumer<Node> c = n -> verifyClipboard();
+		for (var n : nodes)
+		{
+			n.addChangeListener(c);
+			panel.add(n.getComponent());
+		}
+		contentPanel.removeAll();
+		contentPanel.add(menuPanel, BorderLayout.NORTH);
+		contentPanel.add(jsp, BorderLayout.CENTER);
+	}
+
 	/**
 	 * Called on change of data or when the System signifies, the Clipboard changed
 	 */