Paint « JPanel « Java Swing Q&A





1. Drawing over a JPanel and adding the JPanel to JFrame    stackoverflow.com

I need to draw a graph over a JPanel by overriding the JPanel's paintComponent() method. While designing gui using netbeans when i drag/drop a JPanel over JFrame it generates code by ...

2. drawing text within a JPanel    stackoverflow.com

I'm looking for the most basic description of how to draw text within a JPanel. I know there are a billion tutorials out there but none of them are clicking with ...

3. Re-paint problem on translucent frame/panel/component    stackoverflow.com

I'm trying to create a translucent window with Java on OSX and add a JLabel to it. This JLabel changes its text every second.... alt text However the component is ...

4. How paint() in a CLONE JPanel?    stackoverflow.com

Anybody know how can I repaint in a clone JPanel. Im using CLONE, so I can REPAINT() one, and the other will do the same automatically. My code only paints the original ...

5. JPanel paint method is not being called, why?    stackoverflow.com

When i run this code the paintComponent method is not being called It may be very simple error but i dont know why this, plz.

package test;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.image.BufferedImage;
import javax.swing.BorderFactory;
import ...

6. Java drawing on JPanel which on a JFrame    stackoverflow.com

Hi I have a JFrame and there are two JPanels on top of it. My intention is to draw on the JPanels. Can anyone please share any Java code?

7. Custom painting of JPanel    stackoverflow.com

I'm not very good at this and I hope to get some help from people who understands the issue a lot more that I do. So here's the deal. In my ...

8. Java - JPanel won't show up on JFrame when overriding JFrame's paint    stackoverflow.com

I have a JFrame on which I am using overriding the paint method to display some graphics. I also want to add a JPanel to it that will show up on ...

9. java, paint Jpanel, which is inside another JPanel    stackoverflow.com

Hi I made a Fire Simulator with JTextArea http://xieu901.webs.com/fire.jar now I want to make it with JPanel or Canvas instead of JTextarea (just want to challenge myself ^^ ) I managed to draw ...





10. Cannot Add items to custom painted JPanel    stackoverflow.com

When I try to use myCustomPanel.add(someComponent) it does not add... Here is my custom JPanel class:

import java.awt.Graphics;
import java.awt.Image;
import javax.swing.JPanel;


/**
 *
 * @author Jacob
 */
public class OSXMainPanel extends JPanel {
    ...

11. JPanel: automatically paint at creation?    stackoverflow.com

This must be rather trivial and straight forward, but I cannot figure it out. This is what my JPanel looks like, it is added to a JFrame:

private class RadarPanel extends JPanel { ...

12. Java drawing images outside of JPanel class    stackoverflow.com

I have a WorldManager class that extends a JPanel and has: public void paint(Graphics g) {} What I would like to do is have separate classes, like a world class with its own ...

13. How do I GradientPaint on multiple jPanels?    stackoverflow.com

I have a view object that is a jPanel and holds other jPanels which in turn hold jLabels. I'm wanting to paint a gradient overlay on the object to give it ...

14. on runtime paint the whole panels in the gui    stackoverflow.com

I want to be able to change the background color of the gui form.
If I change the parent panel gui - i want all of its descenders to get the same ...

15. Component not visible in JPanel    stackoverflow.com

I have JPanel in a container of a JFrame called Box

public Box(){
        add(new Ball());
    }

    public void paint(Graphics ...

16. Nullpointer exception in Jpanel Paint    stackoverflow.com

I am making a 2d game in java on eclipse and am working on level design. I am getting the following runtime exceptions in my run mode:

`at javax.swing.JComponent.paintToOffscreen(Unknown Source)
   ...





17. XOR Painting issue in java    stackoverflow.com

I have a problem with java Xor method:

public class Okno extends JFrame {

public static void main(String[] args) {
    Okno okno = new Okno();
}


Window()
{
    this.setSize(300,300);
  ...

18. Java JPanel painting not working    stackoverflow.com

I have a problem making an inner class that extends from JPanel to draw anything on it. I overrided the paintComponent method, and whatever I set to draw from here works ...

20. Movable paint objects within JPanel    coderanch.com

21. Help with paint to panel    coderanch.com

All you need to do is use a component like the following to display your image in your applet - public class ImagePanel extends Panel { private Image image; public ImagePanel( Image image ) { this.image = image; } public ImagePanel() { this( null ); } public void setImage( Image image ) { this.image = image; repaint(); } public Image getImage() ...

22. paint()ing a panel    coderanch.com

Very newbie question - sorry, I'm writing a simple app which draws a maze on a panel. My main class extends a frame and I create the panel. Works fine. I draw the maze on the panel. I have a drawPanel object where I get the Graphics from (Graphics g = this.drawPanel.getGraphics() Works fine. Let's say that this window gets covered ...

23. call paint method on a JPanel    coderanch.com

24. Painting in a JPanel?    coderanch.com

ok i have this code... import java.awt.*; import java.awt.event.*; import javax.swing.*; class COB extends JFrame { int count = 0; javax.swing.Timer timer; Robot robot; public COB() { setTitle("Conquer Online Lvl Bot"); getContentPane().add(new StartPanel()); setDefaultCloseOperation(EXIT_ON_CLOSE); setSize(800,600); setVisible(true); changeCursorLocation(); } public void changeCursorLocation() { try { robot = new Robot(); final int W = 800; final int H = 600; ActionListener al = ...

25. access JPanel s paint-method    coderanch.com

never use getGraphics() (well, rarely anyway) 1) it is null until the component is visible 2) if you (e.g.) minimize then maximize the frame, the graphics you have created do not get redrawn - repaint() wipes 'em out. > public void paint(Graphics g) never, ever override paint() in a JComponent - you will end up with very odd behavior instead, override ...

26. JPanel paint component called many times    coderanch.com

No there isn't. Every time the panel needs to be painted, it will be painted. That is with each call to repaint() (which you may be able to control in your own code), but also whenever a component is added to the panel, the panel is made visible, the panel is resized, or even the window with the panel becomes the ...

27. Painting on glass panel    coderanch.com

I have a class which extends from JComponent and it paints string (with help of Swing Timer) which is moving and changing. Whenever my opaque glass panel gets repainted then will content panel too, how I could repaint it from particular area only (glass and content panels) like bounds of the string. Major problem is clearly the CPU usage, because of ...

28. Problem with custom painting and multiple JPanel    coderanch.com

I am learning some custom painting and I encounter some problems. I want to create a frame that when I click a button, the component of the frame get redraw. It worked, however, since I add all the components onto 1 panel, I cant control its layout. So I put every component onto a separate panel, and add all these panel ...

29. Haw to display painting in Panel    coderanch.com

30. Painting of JPanel    coderanch.com

31. Confused about painting in JPanels    coderanch.com

I am trying to learn a little bit about Swing. How do you paint shapes on a JPanel? Most of my code is autogenerated when I drag and drop GUI components on the JFrame. package crazygame; import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Graphics2D; public class MainWindow extends javax.swing.JFrame { /** Creates new form MainWindow */ public MainWindow() { initComponents(); drawinitgraphics(); ...

32. jpanel paint image using method like jpanel1.paint    coderanch.com

Sorry but how does layoutmanager help to fit the image? is that by setting the layout of jlabel? see my code but it does not work public class NewJFrame extends javax.swing.JFrame { /** Creates new form NewJFrame */ public NewJFrame() { initComponents(); Icon icon = new ImageIcon("Fish.jpg"); jLabel1.setLayout(new java.awt.BorderLayout()); // jLabel1.setLayout(new java.awt.CardLayout()); // jLabel1.setLayout(new java.awt.GridLayout(1,1)); jLabel1.setIcon(icon); } and i also try ...

33. help?! paint on top of swing components on JPanel    java-forums.org

I have a JLabel(L1) on a JPanel(P2) with a JScrollPane all on another JPanel(P1), which also has several other JPanels on it. I want to be able to click and drag L1 anywhere on P1. To do this I need to paint over everything which mean I need P1 to paint. I'm assuming to override the paintComponent method would be easiest. ...

34. Jpanel painting problem    java-forums.org

I am developing a gui application and i have a frame which includes two panel. One of them includes some buttons and textfields and a combobox and the other panel paints something over itself. I use timer and overrided paintcomponent method but it always draws the other panel's view on this panel also. Clearly i see over my frame two panels ...

35. JPanel not always painting everything    java-forums.org

When I run any Java application and quickly move another window over the top of it, little horizontal and vertical slivers of white are sometimes left behind. I first noticed this when working on my own Java stuff, but it also happens when running apps directly from the Sun Java site. Is this a common problem? Is there a way to ...

36. Problem painting on JPanel    java-forums.org

I'm trying to make a pong game. I've been searching for the past day or two for a solution to my problem. I've found that I need to extend JPanel in my class and override paintComponent so I can paint on a JPanel, which I have done. The problem is none of my rectangles are being painted. What am I missing? ...

37. Placing a new JPanel over a paint overriden JPanel    java-forums.org

My main JPanel is Menu Panel within a JFrame. When I press the Play JButton, it creates a new Game JPanel, then game starts. But when I press ESC, I want to hold game panel, and display the Menu JPanel and if I press the Continue JButton, I want to go back to Game JPanel.

38. Painting in jPanels    java-forums.org

package javapaint; import java.awt.*; public class JavaPaintUI extends javax.swing.JFrame { int currentX, currentY, oldX, oldY; private void jPanel2MouseDragged(java.awt.event.MouseEvent evt) { currentX = evt.getX(); currentY = evt.getY(); oldX = currentX; oldY = currentY; System.out.println(currentX + " " + currentY); } private void jPanel2MousePressed(java.awt.event.MouseEvent evt) { oldX = evt.getX(); oldY = evt.getY(); System.out.println(oldX + " " + oldY); }

39. Two JPanels and paint(Graphics)    java-forums.org

I am trying to create a game using Java. Until recently, I had very few problems, but when I added a main menu for my game, and at the same time added another JFrame and JPanel, nothing works. The game freezes as soon as I try to go past the main menu, and is trapped in a loop. The simplified example ...

41. Painting onto a JPanel    forums.oracle.com

I am programming a tower defense game and have a JPanel that will potentially have many (possibly 100's of) Shapes painted onto it. I was wondering which would be the more proper way of going about doing this. 1) Having every Object that needs to be painted send it's Shape ( + color + location + etc) information to the panel ...

42. How paint() in a CLONE JPanel?    forums.oracle.com

You could make your panel call the other panel's paint method whenever it's painted? That would be the simple way. What are you trying to do with your program? What clone() does, is creates an "identical" instance of an object. It's still a distinct object. Kinda like identical twins you know, if one raises his hand, the other one doesn't automatically ...

43. Image Moves When Painting on JPanel    forums.oracle.com

Hey. I have a class I created, MyJPanel, extended from JPanel that overrides the paintComponent method. My image paints fine, but I have it set up so that that everytime a "step" button is pressed, the stuff being drawn on the screen is updated, and so update is called on the MyJPanel instance. The image repaints, but it's moved up and ...

44. paint(Graphics g) in JPanel()    forums.oracle.com

I have a paint method I am trying to display in one of two adjacent JPanels. /* the two side by side panels */ JPanel displayPanel = new JPanel(); JPanel controlPanel = new JPanel(); /* the paint method whose content I need to display in the displayPanel() */ public void paint( Graphics g ) NOTE: the graphics are geometric figures I ...

45. JPanel painting problem    forums.oracle.com

/* if(e.getComponent().getClass().getName().equals("ImageComponent1")){ System.out.println("exiting OPEN"); remove(cbtn1); cbtn1 = new ImageComponent1(buffArray[1]); cbtn1.addMouseListener(this); f.add(cbtn1); cbtn1.setLocation(150, 210); f.add(this); revalidate(); repaint(); } if(e.getComponent().getClass().getName().equals("ImageComponent2")){ f.remove(cbtn2); cbtn2= new ImageComponent2(buffArray[2]); cbtn2.addMouseListener(this); f.add(cbtn2); cbtn2.setLocation(200, 210); } if(e.getComponent().getClass().getName().equals("ImageComponent3")){ f.remove(cbtn3); cbtn3 = new ImageComponent3(buffArray[3]); cbtn3.addMouseListener(this); f.add(cbtn3); cbtn3.setLocation(250, 210); } if(e.getComponent().getClass().getName().equals("ImageComponent4")){ f.remove(cbtn4); cbtn4= new ImageComponent4(buffArray[4]); cbtn4.addMouseListener(this); f.add(cbtn4); cbtn4.setLocation(300, 210); } if(e.getComponent().getClass().getName().equals("ImageComponent5")){ f.remove(cbtn5); cbtn5 = new ImageComponent5(buffArray[5]); cbtn5.addMouseListener(this); f.add(cbtn5); cbtn5.setLocation(350, 210); } */