Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>There a number of problems your are facing.</p> <p>Painting in Swing is stateless, that means what ever was previously painting during one cycle, will not appear in the next, unless you physically paint it.</p> <p>Take a look at <a href="http://docs.oracle.com/javase/tutorial/uiswing/painting/" rel="nofollow">Performing Custom Painting</a> and <a href="http://www.oracle.com/technetwork/java/painting-140037.html" rel="nofollow">Painting in AWT and Swing</a> for more details.</p> <p>Unless you synchronize you threads and paint routines (which is not advisable), you should never change the state of any variable that the paint methods may be reliant on out side of the Event Dispatching Thread.</p> <p>Instead of using a <code>Thread</code> you should be using a <code>javax.swing.Timer</code>.</p> <p>You may find <a href="http://docs.oracle.com/javase/tutorial/uiswing/concurrency/" rel="nofollow">Concurrency in Swing</a> and <a href="http://docs.oracle.com/javase/tutorial/uiswing/concurrency/" rel="nofollow">Initial Threads</a> informative</p> <p>You shouldn't be relying on "magic" numbers (such as the character width offset), you should be relying on the underlying system to provide you with useful hints. In this case, you will want to look at <a href="http://docs.oracle.com/javase/tutorial/2d/text/measuringtext.html" rel="nofollow"><code>FontMetrics</code></a></p> <p>You should also avoid using <code>setPreferredSize</code> and override <code>getPreferredSize</code></p> <p>Below is an example of how I might solve the same problem...</p> <pre><code>import java.awt.Color; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Font; import java.awt.FontMetrics; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.Timer; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; class TestPaint02 extends JFrame { JPanel panel; public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { } TestPaint02 obj = new TestPaint02(); obj.makeAnim(); } }); } public void makeAnim() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setTitle("Animate"); setResizable(false); setSize(400, 400); Animate arr1 = new Animate(); getContentPane().add(arr1); setVisible(true); } public class Animate extends JPanel { int i = 0; int[] a = {1, 2, 3, 5, 6, 7, 2, 1, 10, 99}; public Animate() { Timer timer = new Timer(2000, new ActionListener() { @Override public void actionPerformed(ActionEvent e) { i++; repaint(); if (i &gt;= a.length) { ((Timer) e.getSource()).stop(); } } }); timer.setRepeats(true); timer.setInitialDelay(0); timer.start(); } @Override public Dimension getPreferredSize() { return new Dimension(400, 400); } @Override public void paintComponent(Graphics g) { super.paintComponent(g); g.setColor(Color.red); g.setFont(new Font("Courier", Font.PLAIN, 20)); FontMetrics fm = g.getFontMetrics(); int x = 50; int y = 50; for (int loop = 0; loop &lt; i; loop++) { g.drawString(String.valueOf(a[loop]), x, y); x += fm.stringWidth(String.valueOf(a[loop])); } } } } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POkeeping drawn strings on jpanel
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USMadProgrammer
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COIm going to end up animating more than one array on the window so isnt Thread the better choice to have the animations start consecutively?
      singulars
      1. PO
      1. USVega512
    2. CONo. Swing is not thread safe. This means that it's impossible to predict what will occur if one or more threads attempt to update the UI. You could use a `SwingWorker` instead.
      singulars
      1. PO
      1. USMadProgrammer
 

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