Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <ol> <li>You should override <code>paintComponent</code> in your <code>JPanel</code> and call <code>super.paintComponent(g)</code> in it.</li> <li>See <a href="http://docs.oracle.com/javase/tutorial/uiswing/misc/keybinding.html" rel="nofollow noreferrer">How to Use Key Bindings tutorial</a>. Key bindings are preffered in this case rather than a <code>KeyListener</code></li> <li><code>pack()</code> <em>then</em> <code>setVisible()</code></li> <li>You should set global variables for x anf y location, so they can be accessed from within your <code>Action</code>. Then in your actions, increment your x or y and repaint</li> </ol> <p>Try running this example</p> <pre><code>import java.awt.*; import java.awt.event.*; import javax.swing.*; public class KeyBidings extends JFrame { int x = 0; int y = 0; DrawPanel drawPanel = new DrawPanel(); public KeyBidings(){ Action rightAction = new AbstractAction(){ public void actionPerformed(ActionEvent e) { x +=10; drawPanel.repaint(); } }; InputMap inputMap = drawPanel.getInputMap(JPanel.WHEN_IN_FOCUSED_WINDOW); ActionMap actionMap = drawPanel.getActionMap(); inputMap.put(KeyStroke.getKeyStroke("RIGHT"), "rightAction"); actionMap.put("rightAction", rightAction); add(drawPanel); pack(); setDefaultCloseOperation(EXIT_ON_CLOSE); setLocationRelativeTo(null); setVisible(true); } private class DrawPanel extends JPanel { protected void paintComponent(Graphics g) { super.paintComponent(g); g.setColor(Color.GRAY); g.fillRect(0, 0, getWidth(), getHeight()); g.setColor(Color.GREEN); g.fillRect(x, y, 50, 50); } public Dimension getPreferredSize() { return new Dimension(400, 200); } } public static void main(String[] args) { EventQueue.invokeLater(new Runnable(){ public void run(){ new KeyBidings(); } }); } } </code></pre> <p><img src="https://i.stack.imgur.com/6WmIj.gif" alt="enter image description here"></p> <p>Here's the code you're more concerned with</p> <pre><code> Action rightAction = new AbstractAction(){ public void actionPerformed(ActionEvent e) { x +=10; drawPanel.repaint(); } }; InputMap inputMap = drawPanel.getInputMap(JPanel.WHEN_IN_FOCUSED_WINDOW); ActionMap actionMap = drawPanel.getActionMap(); inputMap.put(KeyStroke.getKeyStroke("RIGHT"), "rightAction"); actionMap.put("rightAction", rightAction); </code></pre> <p>Create a custom action and add that action to the action map, linked to the input map keystroke. In the action, just increment or, decrement the x and/or y, depending on the direction, then repaint the panel.</p> <hr> <p><strong>See</strong> <a href="http://docs.oracle.com/javase/tutorial/uiswing/misc/keybinding.html" rel="nofollow noreferrer">Key binding tutorial</a> | <a href="http://docs.oracle.com/javase/tutorial/2d/" rel="nofollow noreferrer">Graphics tutorial</a></p>
    singulars
    1. This table or related slice is empty.
    1. POHow do I make a rectangle move across the screen with key bindings?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USPaul Samsotha
    1. USPaul Samsotha
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POHow do I make a rectangle move across the screen with key bindings?
      singulars
      1. PTQuestion
    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. COwhich animation software are you using to capture that???
      singulars
      1. PO
      1. USMuhammad
    2. CO@Muhammad I just used [CamStudio](http://camstudio.org/) to capture the screen video, then import the avi to photoshop and save for web as a gif
      singulars
      1. PO
      1. USPaul Samsotha
    3. COthanks, it is a nice technique
      singulars
      1. PO
      1. USMuhammad
 

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