slader added - NOT working yet

Author: Rustam-Z

Main.java

@@ -63,7 +63,7 @@ public void actionPerformed(ActionEvent e) {
             }
             else if (e.getSource() == menuItem2) {
                 // Creating Object
-                Sorting sort = new Sorting();   
+                new Sorting();   
                 System.out.println("Menu Item 2 choosed");
             }
             else if (e.getSource() == menuItem2) {

README.md

@@ -36,3 +36,6 @@ Updated: December 13, 2020
 
 - https://stackoverflow.com/questions/1097366/java-swing-revalidate-vs-repaint
 
+- Merge sort: https://www.baeldung.com/java-merge-sort
+
+- http://www.java2s.com/Tutorials/Java/Swing/JSlider/Add_change_event_listener_to_a_JSlider_in_Java.htm

Sorting.java

@@ -3,7 +3,9 @@
 import javax.swing.*;
 import java.awt.*;
 import java.awt.event.*;
-import java.util.*;
+
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
 
 public class Sorting extends Main {
     // Object of the SortingAlgorithm, which includes the sorting algorithms
@@ -30,26 +32,26 @@ public class Sorting extends Main {
         pPanel2.setLayout(new BorderLayout());
 
         // Buttons
-        jbtRandomize = new JButton("Randomize");//create button
-        jbtMerge = new JButton("Merge Sort");//create button
-        jbtBubble = new JButton("Bubble Sort");//create button
-        jbtInsertion = new JButton("Insertion Sort");//create button
-        jbtSelection = new JButton("Selection Sort");//create button
-        jbtStart = new JButton("Start");//create button
+        jbtRandomize = new JButton("Randomize");
+        jbtMerge = new JButton("Merge Sort");
+        jbtBubble = new JButton("Bubble Sort");
+        jbtInsertion = new JButton("Insertion Sort");
+        jbtSelection = new JButton("Selection Sort");
+        jbtStart = new JButton("Start");
         jbtStart.setBackground(Color.GRAY);
 
-        // Progress bar
-        // jb1 = new JProgressBar(0,100);
-        // jb1.setValue(rand.nextInt(100));
-        // jb1.setStringPainted(true);
+        // Slider
+        JSlider slider = new JSlider(0, 100, 0);
+        slider.setPreferredSize(new Dimension(150, 30));
 
         // Adding elements to pPanel1
-        pPanel1.add(jbtRandomize); pPanel1.add(jbtStart);
+        pPanel1.add(jbtRandomize);
         pPanel1.add(jbtMerge); pPanel1.add(jbtSelection); pPanel1.add(jbtBubble); pPanel1.add(jbtInsertion);
+        // pPanel1.add(jbtStart);
+        pPanel1.add(slider, BorderLayout.WEST);
 
         // Adding elements to pPanel2
         pPanel2.add(sortAlgo, BorderLayout.CENTER);
-        // pPanel2.add(jb1, BorderLayout.WEST);
 
         // Register listener, event handling
         ListenerClass listener = new ListenerClass();
@@ -63,6 +65,13 @@ public class Sorting extends Main {
         // Add Panels to the Main JFrame
         add(pPanel1, BorderLayout.NORTH);
         add(pPanel2, BorderLayout.CENTER);
+
+        // Slider settings
+        slider.addChangeListener(new ChangeListener() {
+            public void stateChanged(ChangeEvent event) {
+                int value = slider.getValue();
+            }
+        });
     }
 
     class ListenerClass implements ActionListener {
@@ -73,17 +82,16 @@ public void actionPerformed(ActionEvent e) {
                 sortAlgo.initShuffler();
             }
             else if (e.getSource() == jbtMerge) {
-                System.out.println("jbtMerge button clicked");
+                sortAlgo.mergeSort(); // Bubble sort algotithm
+                sortAlgo.initShuffler(); // shuffling
             }
             else if (e.getSource() == jbtBubble) {
                 sortAlgo.bubbleSort(); // Bubble sort algotithm
                 sortAlgo.initShuffler(); // shuffling
-                System.out.println("jbtBubble button clicked");
             }
             else if (e.getSource() == jbtInsertion) {
                 sortAlgo.insertionSort(); // Insertion algotithm
                 sortAlgo.initShuffler(); // shuffling
-                System.out.println("jbtInsertion button clicked");
             }
             else if (e.getSource() == jbtSelection) {
                 System.out.println("jbtSelection button clicked");

SortingAlgorithm.java

@@ -5,14 +5,15 @@
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.geom.Rectangle2D;
+import java.security.PublicKey;
 import java.util.Random;
 
 import javax.swing.JPanel;
 import javax.swing.SwingWorker;
 
 public class SortingAlgorithm extends JPanel {
-    private final int WIDTH = 800, HEIGHT = WIDTH * 9 /16;
-    private final int SIZE = 100; // the number if sorting elements
+    private final int WIDTH = 800, HEIGHT = WIDTH * 9 / 16;
+    public int SIZE = 50; // the number if sorting elements
     private final float BAR_WIDTH = (float)WIDTH / SIZE; // bar width
     private float[] bar_height = new float[SIZE]; // height of bars
     private SwingWorker<Void, Void> shuffler, sorter;
@@ -104,6 +105,32 @@ public Void doInBackground() throws InterruptedException {
         };
     }
 
+    public void mergeSort() {
+        /*Merge sorting algorithm*/
+        // Change code from bubbleSort to mergeSort
+
+        sorter = new SwingWorker<>() {
+            @Override
+            public Void doInBackground() throws InterruptedException {
+                for(current_index = 0; current_index < SIZE; current_index++) {
+                    for(traversing_index = 1; traversing_index < (SIZE - current_index); traversing_index++) {
+                        if(bar_height[traversing_index - 1] > bar_height[traversing_index]) {
+                            swap(traversing_index, traversing_index - 1);
+                            traversing_index--; // just for annimation
+
+                            Thread.sleep(1); // controls the speed
+                            repaint(); // we need it because we ofter replace the contents of a JPanel
+                        }
+                    }   
+                }
+                current_index = 0;
+                traversing_index = 0;
+
+                return null;
+            }
+        };
+    }
+
     public void initShuffler() {
         /*Shuffles each bar*/
         shuffler = new SwingWorker<>() {