JOptionPane for Errors, general refactoring, deprecated class removed (CameraRenderer) moved into Swing now

modified:
/ SwingCCTVManager ; Error Pane, refactoring
/ WebcamCaptureLoop ; cleanup method for closing cameras reliably, and some MessageDialogs for error handling (just fails lol)
/ SwingCameraWindow ; refactor some legacy code into a "modern" lambda function , Message Dialog for error handling , and some g2d stuff (paintComponent)

removed:
- CameraRenderer.java ; Deprecated Component, was used for SWT GL Surfaces. We dont do that now!

---

rattatwinko

src/main/java/io/swtc/proccessing/WebcamCaptureLoop.java

@@ -1,9 +1,12 @@
 package io.swtc.proccessing;
 
 import com.github.sarxos.webcam.Webcam;
+import com.github.sarxos.webcam.WebcamException;
+
 import java.awt.Dimension;
 import java.awt.image.BufferedImage;
 import java.util.function.Consumer;
+import javax.swing.JOptionPane;
 
 public class WebcamCaptureLoop {
     private final Webcam webcam;
@@ -46,15 +49,39 @@ public class WebcamCaptureLoop {
             }
             try {
                 webcam.close();
+
             } catch (IllegalStateException e) {
-                e.printStackTrace();
+                // show a error message from javax.swing.awt.JOptionPane
+                JOptionPane.showMessageDialog(
+                        null,
+                        "IllegalStateException@"+e,
+                        "IllegalStateException",
+                        JOptionPane.ERROR_MESSAGE
+                );
             }
         });
         captureThread.setName("cam_cap_thread");
         captureThread.start();
     }
 
+    // method for cleaning up
+    private synchronized void cleanup() {
+        try {
+            // if the camera is open try to cloes it!
+            webcam.close();
+        } catch (WebcamException exception) {
+            JOptionPane.showMessageDialog(
+                    null,
+                    "Cleanup failed \nWebCamException@"+exception.getMessage(),
+                    "WebCamException",
+                    JOptionPane.ERROR_MESSAGE
+            );
+        }
+
+    }
+
     public void stop() {
         running = false;
+        cleanup();
     }
 }