I need Help about JAVA GUI

[hwangheechan]

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package SwingTest;
import javax.swing.;
import java.awt.;
import javax.swing.tree.DefaultMutableTreeNode;
import java.awt.event.*;

import java.util.*;
import SwingTest.MyPoint;
import SwingTest.MyBox;

import java.awt.Color;

public class EditorEx extends JFrame {

private Color currentColor = null; 
private int selectedShape = 0;
private DrawingPanel drawPane = null;
private int rotationAngle = 0;

public EditorEx() {
    setTitle("Editor");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	JMenuBar menubar = new JMenuBar();
	
	JMenu fileMenu = new JMenu("File");
	JMenuItem openItem = new JMenuItem("Open");
	JMenuItem saveItem = new JMenuItem("Save");
	JMenuItem closeItem = new JMenuItem("Close");
	fileMenu.add(openItem);
	fileMenu.add(saveItem);
	fileMenu.add(closeItem);
	
	menubar.add(fileMenu);
	
	
	JMenu editMenu = new JMenu("Edit");
	JMenuItem copyItem = new JMenuItem("Copy");
	JMenuItem cutItem = new JMenuItem("Cut");
	JMenuItem pasteItem = new JMenuItem("Paste");
	editMenu.add(copyItem);
	editMenu.add(cutItem);
	editMenu.add(pasteItem);
	
	menubar.add(editMenu);
	
	JMenu shapes = new JMenu("Shape"); // 오탈자 수정
	JMenuItem rectangle = new JMenuItem("rectangle");
	JMenuItem circle = new JMenuItem("circle");
	JMenuItem colorSelect = new JMenuItem("select color");
	JMenuItem rotateShape = new JMenuItem("Rotate Shape"); // 회전 기능 추가
	JMenuItem pencilItem = new JMenuItem("Pencil"); // 연필
	JMenuItem eraserItem = new JMenuItem("Eraser"); // 지우개
	JMenuItem fillColorItem = new JMenuItem("Fill Color"); // 색 채우기

	shapes.add(rectangle);
	shapes.add(circle);
	shapes.add(colorSelect);
	shapes.add(rotateShape);
	shapes.add(pencilItem);
	shapes.add(eraserItem);
	shapes.add(fillColorItem);
	
	menubar.add(shapes);
	
	// 연필과 지우개 기능 추가
	JMenu tools = new JMenu("Tools");
    JMenuItem pencil = new JMenuItem("Pencil");
    JMenuItem eraser = new JMenuItem("Eraser");
    
    tools.add(pencil);
    tools.add(eraser);
    menubar.add(tools);
    
    setJMenuBar(menubar);
    
    pencil.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            selectedShape = 1; // 연필 도구 선택
        }
    });

    eraser.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            selectedShape = 2; // 지우개 도구 선택
        }
    });
    
	
	rectangle.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
        	selectedShape = 3; //rectangle
        	
        }
    });
	
	circle.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
        	selectedShape = 4; //circle
        	
        }
    });
	
	colorSelect.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            // JColorChooser를 사용하여 색상 선택
        	currentColor = JColorChooser.showDialog(EditorEx.this, "Select Color", Color.BLACK);

        }
    });
	
	rotateShape.addActionListener(new ActionListener() {
	    @Override
	    public void actionPerformed(ActionEvent e) {
	        rotationAngle = (rotationAngle + 45) % 360; // 도형을 45도씩 회전
	        drawPane.repaint();
	    }
	});
	
	fillColorItem.addActionListener(new ActionListener() {
		@Override
        public void actionPerformed(ActionEvent e) {
			selectedShape = 5;  // 색 채우기 선택
            currentColor = JColorChooser.showDialog(null, "Select Color", currentColor);
            drawPane.setFillColor(currentColor);  // DrawingPanel에 색 채우기 적용
        }
    });
	
	
	drawPane = new DrawingPanel();
	add(drawPane, BorderLayout.CENTER);
    
	setSize(800, 600);
    setLocationRelativeTo(null);
    
    Container c = getContentPane();
    
    c.setLayout(new BorderLayout());
    //BorderLayout.East, West, South, North, Center

    drawPane = new DrawingPanel();
    drawPane.setBackground(Color.WHITE);
    c.add(drawPane, BorderLayout.CENTER);

    
    JTextPane consolePane = new JTextPane();
    consolePane.setText("Compiling......");
    JScrollPane consoleScrollPane = new JScrollPane(consolePane);
    consoleScrollPane.setPreferredSize(new Dimension(100, 100));
    c.add(consoleScrollPane, BorderLayout.SOUTH);
    
           
    DefaultListModel<String> model = new DefaultListModel<>();
    model.addElement("hello.java");
    model.addElement("world.java");
    
	JList<String> list = new JList<>(model);
	
	JScrollPane listScrollPane = new JScrollPane(list);
	listScrollPane.setPreferredSize(new Dimension(150, 100));
	
	c.add(listScrollPane, BorderLayout.EAST);
			
	  // 루트 노드 생성
    DefaultMutableTreeNode root = new DefaultMutableTreeNode("SRC");

    // 자식 노드 추가
    DefaultMutableTreeNode child1 = new DefaultMutableTreeNode("GUI");
    DefaultMutableTreeNode child2 = new DefaultMutableTreeNode("lib");

    root.add(child1);
    root.add(child2);

    // 자식의 자식 노드 추가
    DefaultMutableTreeNode grandchild1 = new DefaultMutableTreeNode("hello.java");
    DefaultMutableTreeNode grandchild2 = new DefaultMutableTreeNode("world.java");

    child1.add(grandchild1);
    child2.add(grandchild2);

    // JTree 생성
    JTree tree = new JTree(root);

    // JScrollPane에 JTree 추가
    JScrollPane treeScrollPane = new JScrollPane(tree);
    treeScrollPane.setPreferredSize(new Dimension(150, 100));
    
    c.add(treeScrollPane, BorderLayout.WEST);

	pack(); 
	setSize(1024, 712);
    setVisible(true);
}




class DrawingPanel extends JPanel{
	
	private Vector<MyBox> rectList;
	private Vector<MyBox> circleList;

	MyPoint start = null; 
	MyPoint end  = null; 
	
	DrawingPanel(){
		
		rectList = new Vector<MyBox>();
		circleList = new Vector<MyBox>();
		start = new MyPoint();
		end = new MyPoint();
		
		
	   	addMouseListener(new MouseAdapter(){
    		public void mousePressed(MouseEvent e) {
    			System.out.println(EditorEx.this.selectedShape);
    			start.x = e.getX();
    			start.y = e.getY();
    		}
    		public void mouseReleased(MouseEvent e) {
    			System.out.println(EditorEx.this.selectedShape);
    			end.x = e.getX();
    			end.y = e.getY();
    			
        	   	if (EditorEx.this.selectedShape == 0) {
        			
        	   		MyPoint tempStart = new MyPoint(start);
        	   		MyPoint tempEnd = new MyPoint(end);
        	   		MyBox rect = new MyBox(tempStart, tempEnd);
        			rect.setColor(EditorEx.this.currentColor);
        			rectList.add(rect);
        			
        			//g.setColor(EditorEx.this.currentColor);
        			//g.drawRect(rect.sPos.x, rect.sPos.y, rect.width, rect.height);
        			
        		}else if(EditorEx.this.selectedShape == 1) {
        	   		MyPoint tempStart = new MyPoint(start);
        	   		MyPoint tempEnd = new MyPoint(end);
        	   		MyBox cirBox = new MyBox(tempStart, tempEnd);
        	   		cirBox.setColor(EditorEx.this.currentColor);
        	   		circleList.add(cirBox);
        			
        		}
        	   	repaint();
    		}
    		
	   	});	

	}
	
	public void paintComponent(Graphics g) {
		super.paintComponent(g);

		System.out.println(rectList.size());
		System.out.println(circleList.size());
		
		for(int i=0; i < rectList.size(); i++) {
			MyBox temp = rectList.get(i);
			g.setColor(temp.rectColor);
			g.drawRect(temp.sPos.x, temp.sPos.y, temp.width, temp.height);
			System.out.println("x: " + temp.sPos.x + ", y: " + temp.sPos.y + 
	                   ", width: " + temp.width + ", height: " + temp.height);
			   				
		}

		for(int i=0; i < circleList.size(); i++) {
			MyBox temp = circleList.get(i);
			g.setColor(temp.rectColor);
			g.drawOval(temp.sPos.x, temp.sPos.y, temp.width, temp.height);
			   				
		}
	
	}

}

public static void main(String[] args) {
    new EditorEx();
}

}

I want to add pencil, eraser, rotateShape, fillcolor in Shape base on this code. Can you help me how to write code?

[eun2ce]

class DrawingPanel extends JPanel {

    private Vector<MyBox> rectList;
    private Vector<MyBox> circleList;
    private Vector<Vector<MyPoint>> pencilPaths;
    private Color fillColor = null;

    MyPoint start = null;
    MyPoint end = null;
    Vector<MyPoint> currentPencilPath = null;

    DrawingPanel() {
        rectList = new Vector<>();
        circleList = new Vector<>();
        pencilPaths = new Vector<>();
        start = new MyPoint();
        end = new MyPoint();

        addMouseListener(new MouseAdapter() {
            public void mousePressed(MouseEvent e) {
                start.x = e.getX();
                start.y = e.getY();

                if (EditorEx.this.selectedShape == 1) { // Pencil
                    currentPencilPath = new Vector<>();
                    currentPencilPath.add(new MyPoint(e.getX(), e.getY()));
                    pencilPaths.add(currentPencilPath);
                }
            }

            public void mouseReleased(MouseEvent e) {
                end.x = e.getX();
                end.y = e.getY();

                if (EditorEx.this.selectedShape == 3) { // Rectangle
                    MyBox rect = new MyBox(new MyPoint(start), new MyPoint(end));
                    rect.setColor(EditorEx.this.currentColor);
                    rectList.add(rect);
                } else if (EditorEx.this.selectedShape == 4) { // Circle
                    MyBox circle = new MyBox(new MyPoint(start), new MyPoint(end));
                    circle.setColor(EditorEx.this.currentColor);
                    circleList.add(circle);
                }

                repaint();
            }
        });

        addMouseMotionListener(new MouseMotionAdapter() {
            public void mouseDragged(MouseEvent e) {
                if (EditorEx.this.selectedShape == 1 && currentPencilPath != null) { // Pencil
                    currentPencilPath.add(new MyPoint(e.getX(), e.getY()));
                    repaint();
                }
            }
        });
    }

    public void setFillColor(Color color) {
        this.fillColor = color;
    }

    public void paintComponent(Graphics g) {
        super.paintComponent(g);

        // Draw Rectangles
        for (MyBox rect : rectList) {
            g.setColor(rect.rectColor);
            if (fillColor != null) {
                g.fillRect(rect.sPos.x, rect.sPos.y, rect.width, rect.height);
            } else {
                g.drawRect(rect.sPos.x, rect.sPos.y, rect.width, rect.height);
            }
        }

        // Draw Circles
        for (MyBox circle : circleList) {
            g.setColor(circle.rectColor);
            if (fillColor != null) {
                g.fillOval(circle.sPos.x, circle.sPos.y, circle.width, circle.height);
            } else {
                g.drawOval(circle.sPos.x, circle.sPos.y, circle.width, circle.height);
            }
        }

        // Draw Pencil Paths
        for (Vector<MyPoint> path : pencilPaths) {
            g.setColor(EditorEx.this.currentColor != null ? EditorEx.this.currentColor : Color.BLACK);
            for (int i = 0; i < path.size() - 1; i++) {
                MyPoint p1 = path.get(i);
                MyPoint p2 = path.get(i + 1);
                g.drawLine(p1.x, p1.y, p2.x, p2.y);
            }
        }
    }
}

Explanation of Changes

• 1. Pencil Implementation:
  • pencilPaths holds all drawn paths.
  • Each Vector represents a single stroke.
• 2. Eraser Implementation:
  • You can iterate through shapes or paths in the MouseMotionListener and remove those close to the mouse coordinates.
• 3. Rotation Implementation:
  • Add rotation support using transformations. You can use Graphics2D's rotate() method for accurate rotation.
• 4. Fill Color:
  • Added setFillColor() method to handle filling shapes.
  • Adjusted paintComponent() to draw filled shapes.