Databases
StackOverflow2013
Postsdbo
PODo I need to extend JPanel for paintComponent?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PODo I need to extend JPanel for paintComponent?
    primarykey
    data
    text
    <p>Can anyone give me a link (I have looked, almost, everywhere) to the documentation about how to use paintComponent, I am just looking at displaying a .png that I can change the x, y co-ords (from keyboard input). Any help is appreciated.</p> <p><strong>EDIT: Source</strong></p> <p>This is not working, I haven't got paintComponent running properly.</p> <pre><code>import javax.swing.*; import java.awt.event.*; import java.awt.*; class graphicsprogram extends JPanel { public void paintComponent(final Graphics g) { super.paintComponent(g); Image img = new Image("img.png"); final Dimension d = getSize(); g.drawImage(img); } public static void main(String[] args) { final Point point = new Point(); final JFrame frame = new JFrame("Grid"); JLabel label = new JLabel("Drag Me!!!", JLabel.CENTER); JButton close = new JButton(new ImageIcon("close.png")); // Button to close the window because the window is undecorated. close.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { System.exit(0); } }); // Listen to the mouse activity for dragging the window frame.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent e) { point.x = e.getX(); point.y = e.getY(); } }); // Listener for moving the window frame.addMouseMotionListener(new MouseMotionAdapter (){ public void mouseDragged(MouseEvent e) { Point p = frame.getLocation(); frame.setLocation(p.x + e.getX() - point.x, p.y + e.getY() - point.y); } }); close.setPreferredSize(new Dimension(50, 50)); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setUndecorated(true); frame.setMinimumSize(new Dimension(800, 600)); frame.setLocation(200, 200); frame.setLayout(new BorderLayout()); frame.getContentPane().add(close, BorderLayout.NORTH); frame.getContentPane().add(label, BorderLayout.CENTER); frame.getContentPane().setBackground(Color.PINK); frame.setVisible(true); } } </code></pre> <p>Error:</p> <pre><code>javac graphicsprogram.java graphicsprogram.java:8: error: cannot find symbol Image img = Image("img.png"); ^ symbol: method Image(String) location: class graphicsprogram graphicsprogram.java:10: error: no suitable method found for drawImage(Image) g.drawImage(img); ^ method Graphics.drawImage(Image,int,int,int,int,int,int,int,int,Color,ImageObserver) is not applicable (actual and formal argument lists differ in length) method Graphics.drawImage(Image,int,int,int,int,int,int,int,int,ImageObserver) is not applicable (actual and formal argument lists differ in length) method Graphics.drawImage(Image,int,int,int,int,Color,ImageObserver) is not applicable (actual and formal argument lists differ in length) method Graphics.drawImage(Image,int,int,Color,ImageObserver) is not applicable (actual and formal argument lists differ in length) method Graphics.drawImage(Image,int,int,int,int,ImageObserver) is not applicable (actual and formal argument lists differ in length) method Graphics.drawImage(Image,int,int,ImageObserver) is not applicable (actual and formal argument lists differ in length) 2 errors </code></pre> <p><strong>2nd Edit</strong></p> <p>OK so I updated the paintComponent class to this</p> <pre><code> super.paintComponent(g); final Dimension d = getSize(); g.drawImage(ImageIO.read("img.png")); </code></pre> <p>And now I get this error.</p> <pre><code>javac graphicsprogram.java graphicsprogram.java:9: error: cannot find symbol g.drawImage(ImageIO.read("img.png")); ^ symbol: variable ImageIO location: class graphicsprogram 1 error </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USToXic73
    1. USToXic73
    plurals
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. PODo I need to extend JPanel for paintComponent?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PODo I need to extend JPanel for paintComponent?
      1. USToXic73
      1. VTFavorite
    1. COtwo good links: [first](http://docs.oracle.com/javase/tutorial/uiswing/painting/index.html) and [second](http://www.oracle.com/technetwork/java/painting-140037.html)
      singulars
      1. PODo I need to extend JPanel for paintComponent?
      1. USHovercraft Full Of Eels
    2. COAdd some [additional notes](http://stackoverflow.com/questions/17006929/move-bufferedimage-with-keys/17007028#17007028). And no, you don't need to extend `JPanel`, you could extend `JComponent` instead...
      singulars
      1. PODo I need to extend JPanel for paintComponent?
      1. USMadProgrammer
    3. COCan you provide more info? Because maybe you just need to use jlabel instead of rewriting the method.
      singulars
      1. PODo I need to extend JPanel for paintComponent?
      1. USdocDevil
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload