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버튼이 작동하지만 페인트로 그릴 수 없습니다(). SwingDraw의 주요 메소드와 관련이 있다고 생각하지만 100 % 확실하지는 않습니다. 긴 코드에 대한 모든 도움을 주셔서 감사하고 죄송합니다 :/이 코드가 paint()를 트리거하지 않는 이유는 무엇입니까?
SwingDraw :
// Import Core Java packages
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.*;
import javax.swing.*;
public class SwingDraw extends JFrame implements ActionListener, ItemListener{
// Initial Frame size
static final int WIDTH = 1500; // frame width
static final int HEIGHT = 1000; // frame height
// Color choices
static final String[] COLOR_NAMES = new String[]{"None", "Red", "Blue", "Green"};
static final Color COLORS[] = {null, Color.red, Color.blue, Color.green };
// Button control
JButton circle;
JButton roundRec;
JButton threeDRec;
JButton line;
JButton square;
JButton oval;
JButton clear;
JButton delete;
// List to keep track of shapes
JList<String> shapesKeeper;
// Color choice box
JComboBox<String> colorChoice = new JComboBox<>(COLOR_NAMES);
SwingDrawCanvas betterCanvas = new SwingDrawCanvas();
/**
* Constructor
*/
public SwingDraw() {
// Create a frame
setSize(WIDTH, HEIGHT);
setLocation(130, 100);
// add window closing listener
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// create panel for controls
JPanel topPanel = new JPanel();
JPanel leftList = new JPanel();
// create button control
JPanel buttonPanel = new JPanel();
topPanel.add(buttonPanel, BorderLayout.NORTH);
circle = new JButton("Circle");
buttonPanel.add(circle);
roundRec = new JButton("Rounded Rectangle");
buttonPanel.add(roundRec);
threeDRec = new JButton("3D Rectangle");
buttonPanel.add(threeDRec);
line = new JButton("Line");
buttonPanel.add(line);
square = new JButton("Square");
buttonPanel.add(square);
oval = new JButton("Oval");
buttonPanel.add(oval);
clear = new JButton("Clear");
buttonPanel.add(clear);
JPanel listPanel = new JPanel();
leftList.add(listPanel, BorderLayout.WEST);
JList<String> shapesKeeper = new JList<>();
listPanel.add(shapesKeeper);
delete = new JButton("Delete Shape");
listPanel.add(delete);
// add button listener
circle.addActionListener(this);
roundRec.addActionListener(this);
threeDRec.addActionListener(this);
line.addActionListener(this);
square.addActionListener(this);
oval.addActionListener(this);
clear.addActionListener(this);
// create panel for color choices
JPanel colorPanel = new JPanel();
JLabel label = new JLabel("Filled Color:");
topPanel.add(colorPanel);
colorPanel.add(label);
JComboBox<String> colorChoice = new JComboBox<>(COLOR_NAMES);
colorPanel.add(colorChoice);
colorChoice.addItemListener(this);
add(topPanel, BorderLayout.NORTH);
add(leftList, BorderLayout.WEST);
setVisible(true);
} // end of constructor
/**
* Implementing ActionListener
*/
public void actionPerformed(ActionEvent event) {
if(event.getSource() == circle) { // circle button
betterCanvas.setShape(SwingDrawCanvas.CIRCLE);
}
else if(event.getSource() == roundRec) { // rounded rectangle button
betterCanvas.setShape(SwingDrawCanvas.ROUNDED_RECTANGLE);
}
else if(event.getSource() == threeDRec) { // 3D rectangle button
betterCanvas.setShape(SwingDrawCanvas.RECTANGLE_3D);
}
else if(event.getSource() == clear){
betterCanvas.setShape(SwingDrawCanvas.CLEAR);
}
else if(event.getSource() == line){
betterCanvas.setShape(SwingDrawCanvas.LINE);
}
else if(event.getSource() == square){
betterCanvas.setShape(SwingDrawCanvas.SQUARE);
}
else if(event.getSource() == oval){
betterCanvas.setShape(SwingDrawCanvas.OVAL);
}
}
/**
* Implementing ItemListener
*/
public void itemStateChanged(ItemEvent event) {
Color color = COLORS[colorChoice.getSelectedIndex()];
betterCanvas.setFilledColor(color);
}
/**
* the main method
*/
public static void main(String[] argv) {
new SwingDraw();
}
}
SwingDrawCanvas :
public class SwingDrawCanvas extends JPanel implements MouseListener, MouseMotionListener {
// Constants for shapes
public static final int CIRCLE = 1;
public static final int ROUNDED_RECTANGLE = 2;
public static final int RECTANGLE_3D = 3;
public static final int LINE = 4;
public static final int SQUARE = 5;
public static final int OVAL = 6;
public static final int CLEAR = 7;
// Coordinates of points to draw
private int x1, y1, x2, y2;
// shape to draw
private int shape = CIRCLE;
/**
* Method to set the shape
*/
public void setShape(int thisShape) {
System.out.println("HEY");
this.shape = thisShape;
System.out.println(shape);
}
// filled color
private Color filledColor = null;
/**
* Method to set filled color
*/
public void setFilledColor(Color color) {
filledColor = color;
}
/**
* Constructor
*/
public SwingDrawCanvas() {
addMouseListener(this);
addMouseMotionListener(this);
} // end of constructor
/**
* painting the component
*/
public void paint(Graphics g) {
System.out.println("ARHFHASJDASHDHAs");
super.paint(g);
System.out.println("AHAHAHAHAHAHAHA");
g.drawString("FUCK", 1, 1);
// the drawing area
int x, y, width, height;
// determine the upper-left corner of bounding rectangle
x = Math.min(x1, x2);
y = Math.min(y1, y2);
// determine the width and height of bounding rectangle
width = Math.abs(x1 - x2);
height = Math.abs(y1 - y2);
if(filledColor != null)
g.setColor(filledColor);
switch (shape) {
case ROUNDED_RECTANGLE :
if(filledColor == null)
g.drawRoundRect(x, y, width, height, width/4, height/4);
else
g.fillRoundRect(x, y, width, height, width/4, height/4);
break;
case CIRCLE :
int diameter = Math.max(width, height);
if(filledColor == null)
System.out.println("HRE BITCHS");
else
System.out.println("HEY FUCK YOU GUY");
break;
case RECTANGLE_3D :
if(filledColor == null)
g.draw3DRect(x, y, width, height, true);
else
g.fill3DRect(x, y, width, height, true);
break;
}
}
/**
* Implementing MouseListener
*/
public void mousePressed(MouseEvent event) {
x1 = event.getX();
y1 = event.getY();
}
public void mouseReleased(MouseEvent event) {
x2 = event.getX();
y2 = event.getY();
repaint();
}
public void mouseClicked(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
/**
* Implementing MouseMotionListener
*/
public void mouseDragged(MouseEvent event) {
x2 = event.getX();
y2 = event.getY();
repaint();
}
public void mouseMoved(MouseEvent e) {}
}
나는이에서 아주 좋은 아니에요, 나는 ' 당신들이 저에게 줄 수있는 도움을 찾고 있습니다. D
SwingDraw()에서 프레임에'betterCanvas'를 추가해야합니다. –
'SwingDrawCanvas' 패널이 프레임에 절대 추가되지 않습니다. – Berger
그 외에도'void paint (Graphics g) {'를'@Override public void paintComponent (Graphics g) {'1)로 변경하십시오.'@Orride' 메소드는 메소드가 존재하는지 컴파일 타임에 검사합니다. 모든 메서드를 재정의 할 때마다이 메서드를 사용하는 것이 좋습니다. 2) 「paintComponent (..)」메소드를 확장 한 「JComponent」또는 클래스의 커스텀 페인트를 실시하는 올바른 방법. –