GUI DTSUD-67 added interactive actions on gamefield in order to show active field selected while mouse clicked or mouse over

src/main/java/src/GameField.java

@@ -3,6 +3,8 @@ package src;
 import javax.swing.*;
 import javax.swing.border.LineBorder;
 import java.awt.*;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
 
 public class GameField extends JPanel {
 
@@ -10,6 +12,12 @@ public class GameField extends JPanel {
     private JPanel[][] gameField;
     private JLabel[][] labelField;
 
+    private JPanel activePanel = null;
+
+    private static final Color colorDefault = new Color(0, 0, 255, 255);
+    private static final Color colorOnEntered = new Color(0, 0, 255, 100);
+    private static final Color colorOnWhenActive = new Color(0, 255, 150, 200);
+
     public Notes[][] getNoteField() {
         return noteField;
     }
@@ -22,6 +30,10 @@ public class GameField extends JPanel {
         return labelField;
     }
 
+    public JPanel getActivePanel() {
+        return activePanel;
+    }
+
     /**
      * represents the game filed of sudoku
      * @param widthHeight describes the field size in pixels which will be seperated into single sudoku fields
@@ -49,6 +61,7 @@ public class GameField extends JPanel {
 
             for (int j = 0, addJ = 1; j < nrOfFields; j++) {
 
+                JPanel panel = gameField[i][j];
                 gameField[i][j] = new JPanel();
                 gameField[i][j].setBorder(new LineBorder(Color.BLACK, 2));
                 gameField[i][j].setLayout(null);
@@ -64,6 +77,7 @@ public class GameField extends JPanel {
                 noteField[i][j].setBounds(border, border, size-2*border, size-2*border);
                 gameField[i][j].add(noteField[i][j]);
 
+                JLabel lf = labelField[i][j];
                 labelField[i][j] = new JLabel("", SwingConstants.CENTER);
                 labelField[i][j].setBounds(0, 0, size, size);
                 labelField[i][j].setBackground(Color.GREEN);
@@ -74,6 +88,47 @@ public class GameField extends JPanel {
                 labelField[i][j].setBackground(Color.CYAN);
                 labelField[i][j].setText("0");
 
+                gameField[i][j].addMouseListener(new MouseListener() {
+
+                    @Override
+                    public void mouseClicked(MouseEvent e) {
+
+                    }
+
+                    @Override
+                    public void mousePressed(MouseEvent e) {
+                        JPanel component = (JPanel) e.getComponent();
+                        if (activePanel == null) {
+                            activePanel = component;
+                        } else {
+                            activePanel.setBackground(colorDefault);
+                            activePanel = component;
+                        }
+                        component.setBackground(colorOnWhenActive);
+                    }
+
+                    @Override
+                    public void mouseReleased(MouseEvent e) {
+
+                    }
+
+                    @Override
+                    public void mouseEntered(MouseEvent e) {
+                        JPanel component = (JPanel) e.getComponent();
+                        if (component != activePanel) {
+                            component.setBackground(colorOnEntered);
+                        }
+                    }
+
+                    @Override
+                    public void mouseExited(MouseEvent e) {
+                        JPanel component = (JPanel) e.getComponent();
+                        if (!component.getBackground().equals(colorOnWhenActive)) {
+                            component.setBackground(colorDefault);
+                        }
+                    }
+                });
+
                 gameField[i][j].add(labelField[i][j]);
 
             }

src/test/java/GameFieldTest.java

@@ -1,8 +1,13 @@
 
+import org.junit.Before;
 import src.GameField;
+import src.Main;
 import src.Notes;
 
 import org.junit.jupiter.api.*;
+
+import java.awt.*;
+
 import static org.junit.jupiter.api.Assertions.*;
 
 
@@ -159,4 +164,5 @@ public class GameFieldTest {
             }
         }
     }
+
 }

src/test/java/MainTest.java

@@ -2,9 +2,15 @@
 import src.GameField;
 
 import org.junit.jupiter.api.*;
+import src.Main;
+import src.MainFrame;
+
+import java.awt.*;
+
 import static org.junit.jupiter.api.Assertions.*;
 
-public class MainTest {
+public class MainTest  {
+
 
     @Test
     public void testFieldTest() {