Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>@Thomas is correct, but two alternatives are worth noting:</p> <ul> <li><p>This <a href="https://stackoverflow.com/questions/2562685">example</a> shows how to drag a component using <code>JLayeredPane</code>; this <a href="https://stackoverflow.com/questions/2563350">variation</a> expands on the concept; this more recent <a href="https://stackoverflow.com/questions/4894516">example</a> uses a similar approach.</p></li> <li><p>The code below shows how to use a <code>MouseMotionListener</code>; this more complex <a href="https://stackoverflow.com/a/11944233/230513">example</a> uses the same principle.</p></li> </ul> <p>Code:</p> <pre><code>import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Font; import java.awt.Graphics; import java.awt.Point; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionAdapter; import javax.swing.JFrame; import javax.swing.JPanel; /** @see https://stackoverflow.com/a/5312702/230513 */ public class MouseDragTest extends JPanel { private static final String TITLE = "Drag me!"; private static final int W = 640; private static final int H = 480; private Point textPt = new Point(W / 2, H / 2); private Point mousePt; public MouseDragTest() { this.setFont(new Font("Serif", Font.ITALIC + Font.BOLD, 32)); this.addMouseListener(new MouseAdapter() { @Override public void mousePressed(MouseEvent e) { mousePt = e.getPoint(); repaint(); } }); this.addMouseMotionListener(new MouseMotionAdapter() { @Override public void mouseDragged(MouseEvent e) { int dx = e.getX() - mousePt.x; int dy = e.getY() - mousePt.y; textPt.setLocation(textPt.x + dx, textPt.y + dy); mousePt = e.getPoint(); repaint(); } }); } @Override public Dimension getPreferredSize() { return new Dimension(W, H); } @Override public void paintComponent(Graphics g) { super.paintComponent(g); int w2 = g.getFontMetrics().stringWidth(TITLE) / 2; g.drawString(TITLE, textPt.x - w2, textPt.y); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { JFrame f = new JFrame(TITLE); f.add(new MouseDragTest()); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); } }); } } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POJLabel mouse events for Drag and Drop
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USCommunity
    1. UStrashgod
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    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
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COYou're right, the second approach is what I used in some of my programs as well.
      singulars
      1. PO
      1. USThomas
    2. COPlus 1 very nice example
      singulars
      1. PO
      1. USDavid Kroukamp
    3. CO+1, nice example to show how to drag a custom painting as oppose to a real component.
      singulars
      1. PO
      1. UScamickr
 

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