v1.1.4

Added:
- PInstance
- PInstance to Demo

Changed:
- renamed PUIScrollPanel into PUIList
- showFrame-parameter to PUIFrame-Constructors
- Updated README

Fixed:
- SecurityException when interrupting Serial

Author: Paulsen

README.md

@@ -87,18 +87,23 @@ The Library [jSerialComm](https://github.com/Fazecast/jSerialComm) is used for U
 
 ## Project status
 
-The Library is ***fully functional*** and ![Maintenance](https://img.shields.io/maintenance/yes/2021)
+The Library is ***fully functional*** and ![Maintenance](https://img.shields.io/maintenance/yes/2022)
 by [`Paulsen`](https://github.com/realPaulsen)
 
-### Planned Improvements / In Development
+### TODOs & In-Progress
+
+- **BugFixes**
+  - ...
+- **Changes**
+  - Make `run()` of **PConsole** _semi-blocking_ instead of _full-blocking_. In case the Console/Terminal wants an input the run() would be blocked forever
+  - Make `PUIElement` **abstract** and create `PUIButton` to replace the parent-class of the other Elements
+  - **FixPoints** on PUISlider
+  - **Free** movable PUIElements on PUIScrollPanel (without snapped locations)
+- **Additions**
+  - **Graph plotter**: Plot multiple graphs and analyze them
+  - **Built-In **File-Browser** based on PUIList
+  - **Comments**/JavaDoc still missing😬
 
-- **BugFixes:**
-    - Make `run()` of **PConsole** _semi-blocking_ instead of _full-blocking_. In case the Console/Terminal wants an input the run() would be blocked forever
-- Make `PUIElement` **abstract** and create `PUIButton` to replace the parent-class of the other Elements
-- **FixPoints** on PUISlider
-- **Free** movable PUIElements on PUIScrollPanel (without snapped locations)
-- **Graph plotter**: Plot multiple graphs and analyze them
-- **Comments**/JavaDoc still missing😬
 
 
 ## Build-Notes

src/ooo/paulsen/demo/Demo.java

@@ -5,11 +5,15 @@
 import ooo.paulsen.ui.*;
 import ooo.paulsen.ui.PUIElement.ElementAlignment;
 import ooo.paulsen.ui.core.*;
+import ooo.paulsen.utils.PInstance;
 import ooo.paulsen.utils.PSystem;
 
+import javax.swing.*;
 import java.awt.*;
 import java.awt.event.KeyEvent;
 import java.awt.event.KeyListener;
+import java.io.IOException;
+import java.net.BindException;
 
 public class Demo {
 
@@ -22,7 +26,7 @@ public static void main(String[] args) {
     PUICanvas canvas;
     PUIMatrix matrix;
     PUIText darkModeButton;
-    PUIScrollPanel sp;
+    PUIList sp;
     PUICheckBox cb;
     PUIRotaryControl rc;
     PUISlider slider;
@@ -34,6 +38,16 @@ public static void main(String[] args) {
 
     public Demo() {
 
+        try {
+            PInstance p = new PInstance(8123);
+        } catch (BindException e) {
+            System.out.println("Already runs");
+            JOptionPane.showMessageDialog(null,"Port 6434 already taken by another Process","Instance already running",JOptionPane.INFORMATION_MESSAGE);
+            System.exit(0);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
         frameTitle = "JPL-Demo - " + PSystem.getUserName() + "'s " + PSystem.getOSType() + "-System from " + PSystem.getUserDisplayLocation();
 
         // initialize frame before creating Elements
@@ -101,7 +115,7 @@ public void run(PUIElement that) {
         // if set to false: when pressed the eventchain doesnt stop => elements on layers behind this Button can be triggered as well
         darkModeButton.doBlockRaycast(false);
 
-        sp = new PUIScrollPanel(f);
+        sp = new PUIList(f);
 
         cb = new PUICheckBox(f);
         cb.addActionListener(new PUIAction() {

src/ooo/paulsen/io/serial/PSerialConnection.java

@@ -146,7 +146,11 @@ public boolean connect() {
     public boolean disconnect() {
         if (isConnected) {
             port.closePort();
-            listenerThread.interrupt();
+            try {
+                listenerThread.interrupt();
+            } catch (SecurityException e) {
+                System.err.println("[PSerialConnection] :: Couldn't interrupt thread");
+            }
             listenerThread = null;
             isConnected = false;
             return true;
@@ -159,7 +163,7 @@ public boolean isConnected() {
         return isConnected;
     }
 
-    public void setDisconnectEvent(Runnable r){
+    public void setDisconnectEvent(Runnable r) {
         disconnectEvent = r;
     }
 

src/ooo/paulsen/ui/PUIScrollPanel.java renamed to src/ooo/paulsen/ui/PUIList.java

@@ -12,7 +12,7 @@
 import java.util.ConcurrentModificationException;
 import java.util.concurrent.CopyOnWriteArrayList;
 
-public class PUIScrollPanel extends PUIElement {
+public class PUIList extends PUIElement {
 
     private CopyOnWriteArrayList<PUIAction> valueUpdateAction = new CopyOnWriteArrayList<>();
 
@@ -28,13 +28,13 @@ public class PUIScrollPanel extends PUIElement {
 
     private PUISlider slider;
 
-    public PUIScrollPanel(PUIFrame f) {
+    public PUIList(PUIFrame f) {
         super(f);
 
         init();
     }
 
-    public PUIScrollPanel(PUIFrame f, int layer) {
+    public PUIList(PUIFrame f, int layer) {
         super(f);
 
         init();
@@ -65,7 +65,7 @@ public void mouseWheelMoved(MouseWheelEvent e) {
 
                             // Check if elements in list are hovered over
                             for (PUIElement elem : elements)
-                                for (MouseMotionListener ml : elem.mouseMotionListeners)
+                                for (MouseMotionListener ml : elem.getMouseMotionListeners())
                                     ml.mouseMoved(e);
                         }
                     }

src/ooo/paulsen/ui/core/PUIFrame.java

@@ -37,31 +37,57 @@ public class PUIFrame extends JFrame {
 
     public PUIFrame() {
         super();
-        constructorInit();
+        constructorInit(true);
+    }
+
+    public PUIFrame(boolean showFrame) {
+        super();
+        constructorInit(showFrame);
     }
 
     public PUIFrame(String displayName) {
         super();
         this.displayName = displayName;
-        constructorInit();
+        constructorInit(true);
+    }
+
+    public PUIFrame(String displayName, boolean showFrame) {
+        super();
+        this.displayName = displayName;
+        constructorInit(showFrame);
     }
 
     public PUIFrame(int width, int height) {
         super();
         this.w = width;
         this.h = height;
-        constructorInit();
+        constructorInit(true);
+    }
+
+    public PUIFrame(int width, int height, boolean showFrame) {
+        super();
+        this.w = width;
+        this.h = height;
+        constructorInit(showFrame);
     }
 
     public PUIFrame(String displayName, int width, int height) {
         super();
         this.displayName = displayName;
         this.w = width;
         this.h = height;
-        constructorInit();
+        constructorInit(true);
+    }
+
+    public PUIFrame(String displayName, int width, int height, boolean showFrame){
+        super();
+        this.displayName = displayName;
+        this.w = width;
+        this.h = height;
+        constructorInit(showFrame);
     }
 
-    private void constructorInit() {
+    private void constructorInit(boolean showFrame) {
         setTitle(displayName);
         setSize(w, h);
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
@@ -76,7 +102,7 @@ private void constructorInit() {
         hasInit = true;
 
         repaint();
-        setVisible(true);
+        setVisible(showFrame);
     }
 
     private void initWindowListener() {

src/ooo/paulsen/utils/PInstance.java

@@ -0,0 +1,47 @@
+package ooo.paulsen.utils;
+
+import java.io.IOException;
+import java.net.BindException;
+import java.net.InetAddress;
+import java.net.ServerSocket;
+
+/**
+ * Used for singe-instance-Programms <br>
+ * <a href="https://stackoverflow.com/questions/920386/how-to-allow-running-only-one-instance-of-a-java-program-at-a-time">Source</a>
+ */
+public class PInstance {
+
+    private static int PORT;
+    private static ServerSocket socket;
+
+    /**
+     * Creates/reserves a local Port to indicate that this Program is running.
+     * @param port has to be in Range and not be allocated by <a href="https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml">another program</a>
+     * @throws BindException if Another Instance already exists
+     * <br>IOException if the socket failed
+     */
+    public PInstance(int port) throws IOException, BindException {
+        PORT = port;
+
+        //Bind to localhost adapter with a zero connection queue
+        socket = new ServerSocket(PORT, 0, InetAddress.getByAddress(new byte[]{127, 0, 0, 1}));
+    }
+
+    /**
+     *
+     * @param port
+     * @return if a local Program, which reserves/uses a Port, is running.
+     */
+    public static boolean isInstanceRunning(int port) {
+        try {
+            //Bind to localhost adapter with a zero connection queue
+            socket = new ServerSocket(port, 0, InetAddress.getByAddress(new byte[]{127, 0, 0, 1}));
+        } catch (BindException e) {
+            return true;
+        } catch (IOException e) {
+            return false;
+        }
+        return false;
+    }
+
+}