when the Thread thread is running, (after clicking record) it only displays the position the mouse was in when the thread started? how can i make it constantly update, displaying where the mouse is even if i move it around the frame?
#Override public void actionPerformed(ActionEvent e)
{
thread = new Thread(this);
if(e.getSource() == record)
{
thread.start();
System.out.println("record");
}
if(e.getSource() == stopRecording)
{
setVisible(false);
System.out.println("stop recording");
}
}
#Override public void run()
{
setTitle("979");
setSize(screen.width, screen.height);
addMouseListener(this);
setLocationRelativeTo(null);
setLayout(transFlo);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
add(stopRecording);
setOpacity(0.50f);
setVisible(true);
while(true)
{
repaint();
}
}
#Override public void paint(Graphics g)
{
g.drawString(mousePOS + x + space + y, 250, 250);
}
Okay, just to reiterate; PLEASE read The Event Dispatching Thread,
then read Concurrency in Swing
and finally have a read of How to Write a Mouse Listener
ADDINTIONAL
If you want to monitor the global mouse events (all mouse events that pass through the system), then you will want to take a look at Toolkit.addAWTEventListener
This will allow you to monitor all the mouse events without the need to attach mouse listeners to all the components
SIMPLE MOUSE EXAMPLE
Here is a simple example of a panel that monitors the mouse :P
public class CrayPanel extends javax.swing.JPanel implements MouseMotionListener, MouseListener {
private List<Point> lstPoints;
/**
* Creates new form CrayPanel
*/
public CrayPanel() {
lstPoints = new ArrayList<Point>(25);
addMouseListener(this);
addMouseMotionListener(this);
}
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (lstPoints.size() > 1) {
Graphics2D g2d = (Graphics2D) g;
g2d.setColor(Color.RED);
Point startPoint = lstPoints.get(0);
for (int index = 1; index < lstPoints.size(); index++) {
Point toPoint = lstPoints.get(index);
g2d.drawLine(startPoint.x, startPoint.y, toPoint.x, toPoint.y);
startPoint = toPoint;
}
}
}
#Override
public void mouseDragged(MouseEvent e) {
}
#Override
public void mouseMoved(MouseEvent e) {
lstPoints.add(e.getPoint());
repaint();
}
#Override
public void mouseClicked(MouseEvent e) {
lstPoints.clear();
lstPoints.add(e.getPoint());
repaint();
}
#Override
public void mousePressed(MouseEvent e) {
}
#Override
public void mouseReleased(MouseEvent e) {
}
#Override
public void mouseEntered(MouseEvent e) {
lstPoints.add(e.getPoint());
repaint();
}
#Override
public void mouseExited(MouseEvent e) {
lstPoints.add(e.getPoint());
repaint();
}
}
I put together another example. This is essentially a mouse monitor, it shows that, if done correctly, you don't need the Thread
public class MouseFrame extends javax.swing.JFrame implements AWTEventListener, ActionListener {
private boolean monitor = false;
private Point mousePoint;
/**
* Creates new form MouseFrame
*/
public MouseFrame() {
setLayout(new GridBagLayout());
JButton btnToggle = new JButton("Start");
add(btnToggler);
btnToggle.addActionListener(this);
setSize(400, 400);
}
public void actionPerformed(java.awt.event.ActionEvent evt) {
monitor = !monitor;
if (monitor) {
btnTrigger.setText("Stop");
Toolkit.getDefaultToolkit().addAWTEventListener(this, AWTEvent.MOUSE_MOTION_EVENT_MASK);
} else {
btnTrigger.setText("Start");
Toolkit.getDefaultToolkit().removeAWTEventListener(this);
}
}
#Override
public void paint(Graphics grphcs) {
super.paint(grphcs);
Graphics2D g2d = (Graphics2D) grphcs;
if (monitor) {
g2d.setColor(Color.RED);
FontMetrics fm = g2d.getFontMetrics();
g2d.drawString(mousePoint.x + "x" + mousePoint.y, 25, fm.getHeight() + 25);
}
}
/**
* #param args the command line arguments
*/
public static void main(String args[]) {
/*
* Create and display the form
*/
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new MouseFrame().setVisible(true);
}
});
}
#Override
public void eventDispatched(AWTEvent evt) {
if (evt instanceof MouseEvent) {
MouseEvent me = (MouseEvent) evt;
mousePoint = SwingUtilities.convertPoint(me.getComponent(), me.getPoint(), this);
repaint();
}
}
}
Related
I'm struck in a what it seems to be a minor problem. I tried to add MouseListener to Line2D object but it's not working. Is the method or tried is invalid or I can do it another way. Help me figure out what I'm doing wrong here.
public class DrawingLines {
public static void main(String[] args){
LineFrame lf = new LineFrame();
lf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
lf.setVisible(true);
}
}
class LineFrame extends JFrame{
public LineFrame(){
setTitle("Line test");
setSize(500, 500);
LinesPanel lp = new LinesPanel();
Container contentpane = getContentPane();
contentpane.add(lp);
}
}
class LinesPanel extends JPanel{
public LinesPanel(){
}
public void paintComponent(Graphics g){
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
Line2D line = new Line2D.Double(105.5, 306.6, 350.8, 4.9);
g2.draw(line);
line.addMouseListener(new MouseListener(){
#Override
public void mouseClicked(MouseEvent e) {
System.out.println("Line Clicked !");
}
#Override
public void mousePressed(MouseEvent e) {
}
#Override
public void mouseReleased(MouseEvent e) {
}
#Override
public void mouseEntered(MouseEvent e) {
}
#Override
public void mouseExited(MouseEvent e) {
}
});
}
}
Add the MouseListener to the LinesPanel. And use the MouseEvent coordinates to check whether the click is close to the line.
See How to select a line
The Line component doesn't have a clickable area so a mouselistener won't work properly, what you might want to do is add an invisible square/rectangle/polygon over it to handle the mouse instead.
I am only posting the relevant code. I am fairly new to java and right now I am building a program that will allow the user to use a draw method. However, when I click the button for drawing in the interface, it automatically generates a random line anywhere on the page and does not allow user interaction. I think the error is occurring in my mouseListener method, but I am not sure as this is my first time doing anything like this. Any help would be greatly appreciated. Thank you!
Also, the error that prints out is: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
public class SimplePaint extends JFrame {
JButton drawing = new JButton();
Line2D draw = new Line2D.Float();
Point start = null;
Point end = null;
public SimplePaint() {
JPanel panel = new JPanel() {
{
addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
start = e.getPoint();
}
public void mouseReleased(MouseEvent e) {
start = e.getPoint();
//start = null;
}
});
addMouseMotionListener(new MouseMotionAdapter() {
public void mouseMoved(MouseEvent e) {
end = e.getPoint();
}
public void mouseDragged(MouseEvent e) {
end = e.getPoint();
repaint();
}
});
}
};
drawing.setText("Draw");
panel.add(drawing);
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == drawing) {
draw = new Line2D.Float(start.x, start.y, end.x, end.y);
}
repaint();
}
};
drawing.addActionListener(actionListener);
}
public void paint(Graphics g) {
super.paint(g);
Graphics2D g2 = (Graphics2D) g;
Line2D line = new Line2D.Float(0, 250, 2000, 300);
g2.draw(draw);
}
}
I want to, when i click the "d" button, start a timer. This is to animate a player walking. The timer doesn't start when i press the key, how do i do that?
The code I have is this:
public class Game extends JPanel implements KeyListener {
//Player variables
private BufferedImage playerStanding;
private BufferedImage playerWalking;
private BufferedImage playerFrame;
private boolean walking = false;
private final int PLAYER_HEIGHT = 100;
private final int PLAYER_WIDTH = 100;
private final int INITIAL_X = 0;
private final int INITIAL_Y = 500;
private int x = INITIAL_X;
private int y = INITIAL_Y;
//The timer I want to start on keypress-> "d"
private Timer playerAnimationTimer;
public Game() {
setPreferredSize(new Dimension(800, 800));
setBackground(Color.CYAN);
//Player
try {
playerStanding = ImageIO.read(getClass().getResource("player1.gif"));
playerWalking = ImageIO.read(getClass().getResource("player2.gif"));
playerFrame = playerStanding;
}
catch (IOException ex) {
ex.printStackTrace();
}
playerAnimationTimer = new Timer(500, new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
walking = !walking;
playerFrame = walking ? playerWalking : playerStanding;
x += 10;
if (x > getWidth() - PLAYER_WIDTH) {
x = INITIAL_X;
}
repaint();
}
});
playerAnimationTimer.setRepeats(true);
}
public Dimension setPreferredSize() {
return new Dimension(800, 800);
}
#Override
public void paintComponent(Graphics graphics) {
super.paintComponent(graphics);
Graphics2D graphics2D = (Graphics2D) graphics;
if (playerFrame != null) {
graphics2D.drawImage(playerFrame, x, y, PLAYER_WIDTH, PLAYER_HEIGHT, this);
}
graphics2D.dispose();
}
#Override
public void keyTyped(KeyEvent e) {
//This doesn't work
playerAnimationTimer.start();
}
#Override
public void keyPressed(KeyEvent e) {
}
#Override
public void keyReleased(KeyEvent e) {
}
}
//The class to hold the gamepanel
public class StartGame extends JFrame implements ActionListener {
private static JButton startGame = new JButton();
StartGame() {
setDefaultCloseOperation(WindowConstants.HIDE_ON_CLOSE);
setSize(200, 100);
setVisible(true);
setBackground(Color.BLUE);
setLocationRelativeTo(null);
startGame.setText("Play!");
startGame.setSize(100, 25);
startGame.addActionListener(this);
add(startGame);
}
#Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == startGame) {
this.setVisible(false);
new GameWindow();
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
new StartGame();
}
});
}
}
How could I make the timer start when I click the "d" button?
Your KeyListener doesn't work because you never add the KeyListener to anything much less to a component that has focus, which is needed for a KeyListener to work.
I suggest that you instead use Key Bindings as a cleaner safer way to capture the desired key press.
As an aside, never dispose of a Graphics object that is given to you from the JVM.
For a better answer, please edit your code to make it comply with the mcve standard. You should use no images files, and it should compile and run for us unaltered.
You could set the private Timer like you did and start it like this...
public void startTimer(){
timer.start();
timer.setRepeats(true);
}
I have no Idea why my JFrame keeps freezeing after I type Letters into the JTextField "Username" and "Password" :/ Could anyone look thru my code and tell my why and fix it please ?
public class Main
{
public static void main(String [ ] args)
{
LoginWindow loginframe = new LoginWindow();
loginframe.setVisible(true);
loginframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
loginframe.initialize();
while(true)
{
try {
Thread.sleep(50);
} catch (InterruptedException e) {
e.printStackTrace();
}
loginframe.Repaint();
}
}
}
FrameClass:
public class LoginWindow extends JFrame implements MouseListener, KeyListener, MouseMotionListener{
public LoginWindow(){
setSize(806, 629);
setResizable(false);
setLayout(new BorderLayout());
background = new JLabel(ResourceLoader.Iconload("/main_01.jpg"));
background.setBounds(0, 0, 800, 600);
add(background);
background.setLayout(null);
Username = new JTextField("", 20);
Username.setForeground(Color.WHITE);
Username.setBounds(312, 433, 170, 40);
Username.setFont(new Font("Impact", Font.BOLD, 25));
Username.setBackground(Color.BLACK);
Username.setBorder(BorderFactory.createMatteBorder(0, 0, 5, 0, Color.BLACK));
background.add(Username);
Password = new JPasswordField("", 20);
Password.setForeground(Color.WHITE);
Password.setBounds(312, 489, 170, 40);
Password.setBackground(Color.BLACK);
Password.setBorder(BorderFactory.createMatteBorder(0, 0, 5, 0, Color.BLACK));
Password.setFont(new Font("Serif", Font.BOLD, 25));
background.add(Password);
}
public void initialize()
{
makestrat();
addKeyListener(this);
requestFocus();
addMouseListener(this);
addMouseMotionListener(this);
}
public void makestrat()
{
createBufferStrategy(2);
strat = getBufferStrategy();
}
public void Repaint()
{
//System.out.println(mouseX + " " + mouseY);
Graphics g = strat.getDrawGraphics();
paintComponents(g);
Draw(g);
g.dispose();
strat.show();
}
public void Update()
{
}
public void Draw(Graphics g)
{
if(((mouseX >= 499) && (mouseX <= 669)) && ((mouseY >= 433)&&( mouseY <= 530))){
g.drawImage(ResourceLoader.ImageLoad("/login_02.jpg"), 502, 459, null);
}else{
g.drawImage(ResourceLoader.ImageLoad("/login_01.jpg"), 502, 459, null);
}
}
private class thehandler implements ActionListener{
#Override
public void actionPerformed(ActionEvent event) {
}
}
public void mouseMoved(MouseEvent event)
{
mouseY = event.getY()-26;
mouseX = event.getX()-3;
}
#Override
public void mouseClicked(MouseEvent e) {
PointerInfo a = MouseInfo.getPointerInfo();
Point point = new Point(a.getLocation());
SwingUtilities.convertPointFromScreen(point, e.getComponent());
double mouseX = (int) point.getX();
double mouseY = (int) point.getY();
System.out.println("(ContainerPos) Mouse clicked! X: " + mouseX + " Y: " + mouseY);
}
#Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
}
#Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
}
#Override
public void mousePressed(MouseEvent e) {
}
#Override
public void mouseReleased(MouseEvent e) {
}
#Override
public void keyPressed(KeyEvent arg0) {
// TODO Auto-generated method stub
}
#Override
public void keyReleased(KeyEvent arg0) {
// TODO Auto-generated method stub
}
#Override
public void keyTyped(KeyEvent arg0) {
// TODO Auto-generated method stub
}
#Override
public void mouseDragged(MouseEvent arg0) {
// TODO Auto-generated method stub
}
}
You don't need the while loop with the Thread.sleeap(). It's screwing with your program.
What you're trying to achieve here, a call to repaint continuously, can easily be accomplished with a javax.swing.Timer
Don't explicitly call paintComponent. An actual call to the real repaint() method will do that for you. No need to create an imitation Repaint()
Use a JPanel for painting instead of trying to paint on a JFrame
I would initialize, then set visible
Your code doesn't even compilable, so I can try and make fixes for you.
Use Java naming convention: methods and variable start with lower case letters.
Here's an example of a simple Login Window, using a modal JDialog
Learn how to use Layout Managers instead of relying on setBounds()
Point 2. Your main should look like this
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
public void run(){
LoginWindow loginframe = new LoginWindow();
loginframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
loginframe.initialize();
loginframe.setVisible(true);
}
});
}
And in your constructor, have a javax.swing.Timer instead of your while loop
private Timer timer = null;
private DrawPanel drawPanel = new DrawPanel(); // see below for DrawPanel
public LoginWindow() {
// add drawPanel somewhere
...
timer = new Timer (50, new ActionListener(){
public void actionPerformed(ActionEvent e) {
drawPanel.repaint();
}
});
timer.start();
}
Point 4. Have an inner JPanel class that you do all your painting in, and add that component to the frame. You'll need to override the paintComponent method.
private DrawPanel extends JPanel {
#Override
protected void paintComponent(Graophics g) {
super.paintComponent(g);
Draw(g);
}
}
The obvious thing is that you shouldn't use Swing (or AWT really) off of the AWT Event Dispatch Thread (EDT). Fix with java.awt.EventQueue.invokeLater and java.swing.Timer (not java.util!). Diagnose with jstack(and jps) or the relevant key sequence in the terminal window (um, ctrl-break in Windows, ctrl-3 in Linux).
I have this constructor:
public Board(final boolean[][] board) {
this.board = board;
height = board.length;
width = board[0].length;
setBackground(Color.black);
button1 = new JButton("Run");
add(button1);
button1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
isActive = !isActive;
button1.setText(isActive ? "Pause" : "Run");
}
});
button2 = new JButton("Random");
add(button2);
button2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
setBoard(randomBoard());
}
});
button3 = new JButton("Clear");
add(button3);
button3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
setBoard(clearBoard());
}
});
addMouseListener(new MouseListener() {
#Override
public void mouseClicked(MouseEvent e) {
}
#Override
public void mouseEntered(MouseEvent e) {
}
#Override
public void mouseExited(MouseEvent e) {
}
#Override
public void mousePressed(MouseEvent e) {
board[e.getY() / multiplier][e.getX() / multiplier] = !board[e.getY() / multiplier][e.getX() / multiplier];
}
#Override
public void mouseReleased(MouseEvent e) {
}
});
}
The ActionListeners are always 'listening'; however the MouseListenerstops 'listening' after I click Run (button1). Why is this and how do I make MouseListener remain listening?
If it's any use, I also have this paintComponent class:
#Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
for (int i = 0; i < height; i++) {
for (int j = 0; j < width; j++) {
g.setColor(board[i][j] ? Color.green : Color.gray);
g.fillRect(j * multiplier, i * multiplier, multiplier - 1, multiplier - 1);
}
}
if (isActive) {
timer.start();
}
else {
timer.stop();
repaint();
}
}
A MouseListener will continue to work as long as the object you added it to is still alive and assuming you haven't called removeMouseListener() on it. As your program runs and changes data and such, the behavior of the code inside your listener may change (e.g., a flag is set causing it to ignore a call to another method), but the listener will be "always running" and its methods will be called.
(As I mentioned in my comment, your problem likely has to do with the strange things you are doing in your paintComponent() method.)