Java swing Paint method not being called
0
I've setup this really bare-bones View class to test out the Paint method from java swing. However, I noticed that even though I create an instance of view from another class and keep calling the update method below, the paint method is never executed. EDIT: I added code from main and controller.
import java.awt.*;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class View extends JPanel {
//Attributes
private static int frameWidth = 500;
private static int frameHeight = 500;
private JFrame frame; // the frame
private JPanel menu;
private JPanel game;
private JPanel summary;
//Constructor
public View(ControlListener controlListener) {
this.frame = new JFrame();
frame.setLayout(new GridLayout(3,1));
frame.addKeyListener(controlListener);
frame.setTitle("MyFrame");
frame.setBackground(Color.blue);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(frameWidth, frameHeight);
frame.getContentPane().setBackground(Color.blue);
frame.setVisible(true);
}
//Methods
public JFrame getFrame() {
return frame;
}
public static int getFrameWidth() {
return frameWidth;
}
public static int getFrameHeight() {
return frameHeight;
}
//frame updater
public void update() {
frame.repaint();
}
@Override
public void paint(Graphics g) {
System.out.println("test");
}
Snippet from main:
public static void main(String args) {
Controller v = new Controller();
v.start();
}
Snippet from controller:
public class Controller {
//Attributes
private Model model;
private View view;
//Constructor
public Controller(){
view = new View(controlListener);
}
//run
public void start(){
run();
}
public void run(){
while(true){
view.update();
}
}
java swing user-interface
asked Nov 13 '18 at 6:49
the_martianthe_martian
329113
add a comment |
0
I've setup this really bare-bones View class to test out the Paint method from java swing. However, I noticed that even though I create an instance of view from another class and keep calling the update method below, the paint method is never executed. EDIT: I added code from main and controller.
import java.awt.*;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class View extends JPanel {
//Attributes
private static int frameWidth = 500;
private static int frameHeight = 500;
private JFrame frame; // the frame
private JPanel menu;
private JPanel game;
private JPanel summary;
//Constructor
public View(ControlListener controlListener) {
this.frame = new JFrame();
frame.setLayout(new GridLayout(3,1));
frame.addKeyListener(controlListener);
frame.setTitle("MyFrame");
frame.setBackground(Color.blue);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(frameWidth, frameHeight);
frame.getContentPane().setBackground(Color.blue);
frame.setVisible(true);
}
//Methods
public JFrame getFrame() {
return frame;
}
public static int getFrameWidth() {
return frameWidth;
}
public static int getFrameHeight() {
return frameHeight;
}
//frame updater
public void update() {
frame.repaint();
}
@Override
public void paint(Graphics g) {
System.out.println("test");
}
Snippet from main:
public static void main(String args) {
Controller v = new Controller();
v.start();
}
Snippet from controller:
public class Controller {
//Attributes
private Model model;
private View view;
//Constructor
public Controller(){
view = new View(controlListener);
}
//run
public void start(){
run();
}
public void run(){
while(true){
view.update();
}
}
java swing user-interface
asked Nov 13 '18 at 6:49
the_martianthe_martian
329113
Mention your class with main method as well.
– Varun Jain
Nov 13 '18 at 7:00
@VarunJain Gotcha :)
– the_martian
Nov 13 '18 at 7:06
public void paint(Graphics g) { System.out.println("test");1) For anyJComponent, the correct method for custom painting ispublic void paintComponent(Graphics g)..2) Best practice when doing so is to immediately call thesupermethod to ensure the previous drawing is cleared and the BG and borders correctly painted.
– Andrew Thompson
Nov 13 '18 at 8:15
Possible Duplicate stackoverflow.com/questions/44269435/…
– Varun Jain
Nov 13 '18 at 10:09
add a comment |
0
0
0
I've setup this really bare-bones View class to test out the Paint method from java swing. However, I noticed that even though I create an instance of view from another class and keep calling the update method below, the paint method is never executed. EDIT: I added code from main and controller.
import java.awt.*;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class View extends JPanel {
//Attributes
private static int frameWidth = 500;
private static int frameHeight = 500;
private JFrame frame; // the frame
private JPanel menu;
private JPanel game;
private JPanel summary;
//Constructor
public View(ControlListener controlListener) {
this.frame = new JFrame();
frame.setLayout(new GridLayout(3,1));
frame.addKeyListener(controlListener);
frame.setTitle("MyFrame");
frame.setBackground(Color.blue);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(frameWidth, frameHeight);
frame.getContentPane().setBackground(Color.blue);
frame.setVisible(true);
}
//Methods
public JFrame getFrame() {
return frame;
}
public static int getFrameWidth() {
return frameWidth;
}
public static int getFrameHeight() {
return frameHeight;
}
//frame updater
public void update() {
frame.repaint();
}
@Override
public void paint(Graphics g) {
System.out.println("test");
}
Snippet from main:
public static void main(String args) {
Controller v = new Controller();
v.start();
}
Snippet from controller:
public class Controller {
//Attributes
private Model model;
private View view;
//Constructor
public Controller(){
view = new View(controlListener);
}
//run
public void start(){
run();
}
public void run(){
while(true){
view.update();
}
}
java swing user-interface
asked Nov 13 '18 at 6:49
the_martianthe_martian
329113
I've setup this really bare-bones View class to test out the Paint method from java swing. However, I noticed that even though I create an instance of view from another class and keep calling the update method below, the paint method is never executed. EDIT: I added code from main and controller.
import java.awt.*;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class View extends JPanel {
//Attributes
private static int frameWidth = 500;
private static int frameHeight = 500;
private JFrame frame; // the frame
private JPanel menu;
private JPanel game;
private JPanel summary;
//Constructor
public View(ControlListener controlListener) {
this.frame = new JFrame();
frame.setLayout(new GridLayout(3,1));
frame.addKeyListener(controlListener);
frame.setTitle("MyFrame");
frame.setBackground(Color.blue);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(frameWidth, frameHeight);
frame.getContentPane().setBackground(Color.blue);
frame.setVisible(true);
}
//Methods
public JFrame getFrame() {
return frame;
}
public static int getFrameWidth() {
return frameWidth;
}
public static int getFrameHeight() {
return frameHeight;
}
//frame updater
public void update() {
frame.repaint();
}
@Override
public void paint(Graphics g) {
System.out.println("test");
}
Snippet from main:
public static void main(String args) {
Controller v = new Controller();
v.start();
}
Snippet from controller:
public class Controller {
//Attributes
private Model model;
private View view;
//Constructor
public Controller(){
view = new View(controlListener);
}
//run
public void start(){
run();
}
public void run(){
while(true){
view.update();
}
}
java swing user-interface
java swing user-interface
asked Nov 13 '18 at 6:49
the_martianthe_martian
329113
asked Nov 13 '18 at 6:49
the_martianthe_martian
329113
edited Nov 13 '18 at 7:06
the_martian
asked Nov 13 '18 at 6:49
the_martianthe_martian
329113
asked Nov 13 '18 at 6:49
the_martianthe_martian
329113
asked Nov 13 '18 at 6:49
the_martianthe_martian
329113
329113
Mention your class with main method as well.
– Varun Jain
Nov 13 '18 at 7:00
@VarunJain Gotcha :)
– the_martian
Nov 13 '18 at 7:06
public void paint(Graphics g) { System.out.println("test");1) For anyJComponent, the correct method for custom painting ispublic void paintComponent(Graphics g)..2) Best practice when doing so is to immediately call thesupermethod to ensure the previous drawing is cleared and the BG and borders correctly painted.
– Andrew Thompson
Nov 13 '18 at 8:15
Possible Duplicate stackoverflow.com/questions/44269435/…
– Varun Jain
Nov 13 '18 at 10:09
add a comment |
Mention your class with main method as well.
– Varun Jain
Nov 13 '18 at 7:00
@VarunJain Gotcha :)
– the_martian
Nov 13 '18 at 7:06
public void paint(Graphics g) { System.out.println("test");1) For anyJComponent, the correct method for custom painting ispublic void paintComponent(Graphics g)..2) Best practice when doing so is to immediately call thesupermethod to ensure the previous drawing is cleared and the BG and borders correctly painted.
– Andrew Thompson
Nov 13 '18 at 8:15
Possible Duplicate stackoverflow.com/questions/44269435/…
– Varun Jain
Nov 13 '18 at 10:09
Mention your class with main method as well.
– Varun Jain
Nov 13 '18 at 7:00
Mention your class with main method as well.
– Varun Jain
Nov 13 '18 at 7:00
@VarunJain Gotcha :)
– the_martian
Nov 13 '18 at 7:06
@VarunJain Gotcha :)
– the_martian
Nov 13 '18 at 7:06
public void paint(Graphics g) { System.out.println("test"); 1) For any JComponent, the correct method for custom painting is public void paintComponent(Graphics g).. 2) Best practice when doing so is to immediately call the super method to ensure the previous drawing is cleared and the BG and borders correctly painted.– Andrew Thompson
Nov 13 '18 at 8:15
public void paint(Graphics g) { System.out.println("test"); 1) For any JComponent, the correct method for custom painting is public void paintComponent(Graphics g).. 2) Best practice when doing so is to immediately call the super method to ensure the previous drawing is cleared and the BG and borders correctly painted.– Andrew Thompson
Nov 13 '18 at 8:15
Possible Duplicate stackoverflow.com/questions/44269435/…
– Varun Jain
Nov 13 '18 at 10:09
Possible Duplicate stackoverflow.com/questions/44269435/…
– Varun Jain
Nov 13 '18 at 10:09
add a comment |
1 Answer
1
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oldest
votes
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There is never an instance of View added to the JFrame, so Swing has no reason to paint an invisible component.
answered Nov 13 '18 at 7:20
SurfManSurfMan
863511
add a comment |
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1 Answer
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1 Answer
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active
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1
There is never an instance of View added to the JFrame, so Swing has no reason to paint an invisible component.
answered Nov 13 '18 at 7:20
SurfManSurfMan
863511
add a comment |
1
There is never an instance of View added to the JFrame, so Swing has no reason to paint an invisible component.
answered Nov 13 '18 at 7:20
SurfManSurfMan
863511
add a comment |
1
1
1
There is never an instance of View added to the JFrame, so Swing has no reason to paint an invisible component.
answered Nov 13 '18 at 7:20
SurfManSurfMan
863511
There is never an instance of View added to the JFrame, so Swing has no reason to paint an invisible component.
answered Nov 13 '18 at 7:20
SurfManSurfMan
863511
answered Nov 13 '18 at 7:20
SurfManSurfMan
863511
answered Nov 13 '18 at 7:20
SurfManSurfMan
863511
answered Nov 13 '18 at 7:20
SurfManSurfMan
863511
863511
add a comment |
add a comment |
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Mention your class with main method as well.
– Varun Jain
Nov 13 '18 at 7:00
@VarunJain Gotcha :)
– the_martian
Nov 13 '18 at 7:06
public void paint(Graphics g) { System.out.println("test");1) For anyJComponent, the correct method for custom painting ispublic void paintComponent(Graphics g)..2) Best practice when doing so is to immediately call thesupermethod to ensure the previous drawing is cleared and the BG and borders correctly painted.– Andrew Thompson
Nov 13 '18 at 8:15
Possible Duplicate stackoverflow.com/questions/44269435/…
– Varun Jain
Nov 13 '18 at 10:09