Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I think that <code>gImg.dispose();</code></p> <p>maybe this code can help you with that (from old.forums.sun.com)</p> <p><img src="https://i.stack.imgur.com/V7kSe.jpg" alt="enter image description here"><img src="https://i.stack.imgur.com/2ACsJ.jpg" alt="enter image description here"><img src="https://i.stack.imgur.com/oGU6v.jpg" alt="enter image description here"></p> <pre><code>import java.awt.*; import java.awt.event.*; import java.awt.geom.*; import java.util.ArrayList; import javax.swing.*; public class BezierTest { private class Animator implements ActionListener { private double distance = 0; private boolean moveTo = true; private ArrayList&lt;Point2D&gt; points = new ArrayList&lt;Point2D&gt;(); private double step = -1; private double steps; private Timer timer = new Timer(0, this); @Override public void actionPerformed(ActionEvent e) { step++; if (step &lt;= steps) { double t = step / steps; Point2D newPoint = computeBezierPoint(new Point2D.Double(), t, curvePoints); marks[marks.length - 1].setFrame(newPoint.getX() - 5, newPoint.getY() - 5, 10, 10); points.add(newPoint); if (moveTo) { path.moveTo(newPoint.getX(), newPoint.getY()); moveTo = false; } else { path.lineTo(newPoint.getX(), newPoint.getY()); } lines[3] = new Line2D.Double(computePointOnLine(lines[0], t), computePointOnLine(lines[1], t)); lines[4] = new Line2D.Double(computePointOnLine(lines[1], t), computePointOnLine(lines[2], t)); lines[5] = new Line2D.Double(computePointOnLine(lines[3], t), computePointOnLine(lines[4], t)); // The maximum distance encountered between the results of two calculation methods. // newPoint from computeBezierPoint() the other via the lines method distance = Math.max(distance, newPoint.distance(computePointOnLine(lines[5], t))); demoComponent.repaint(); } else { timer.stop(); animationButton.setEnabled(true); if (distance &gt; 0d) { System.out.println("Maximum difference " + distance); } } } public void init() { timer.stop(); animationButton.setEnabled(false); steps = sliderStep.getValue(); step = -1; distance = 0; moveTo = true; path = new Path2D.Double(); int sleepTime = (int) Math.round(1000d * sliderDuration.getValue() / steps); timer.setDelay(sleepTime); timer.setInitialDelay(0); timer.start(); } private Point2D computeBezierPoint(Point2D rv, double t, Point2D... curve) { if (rv == null) { rv = new Point2D.Double(); } else { rv.setLocation(0, 0); } int n = curve.length - 1; double oneMinusT = 1.0 - t; for (int index = 0; index &lt; curve.length; index++) { double multiplier = index == 0 || index == n ? 1 : StrictMath.min(n - index, index) * n; multiplier *= StrictMath.pow(t, index) * StrictMath.pow(oneMinusT, n - index); rv.setLocation(rv.getX() + multiplier * curve[index].getX(), rv.getY() + multiplier * curve[index].getY()); } return rv; } private Point2D computePointOnLine(Line2D line, double t) { return new Point2D.Double((line.getX2() - line.getX1()) * t + line.getX1(), (line.getY2() - line.getY1()) * t + line.getY1()); } } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { new BezierTest().createGUI(); } }); } private final JButton animationButton = new JButton(new AbstractAction("Start animation") { private static final long serialVersionUID = 1L; @Override public void actionPerformed(ActionEvent e) { animator.init(); } }); private final Animator animator = new Animator(); private Point2D[] curvePoints = new Point2D[]{new Point(10, 50), new Point(190, 10), new Point(190, 190), new Point(10, 150)}; private JComponent demoComponent = new JComponent() { private static final long serialVersionUID = 1L; { setPreferredSize(new Dimension(400, 400)); addComponentListener(new ComponentAdapter() { @Override public void componentResized(ComponentEvent e) { int w = getWidth(); int h = getHeight(); recalculateAfterResize(w, h); } }); } @Override protected void paintComponent(Graphics g) { if (isVisible()) { g.setColor(Color.WHITE); g.fillRect(0, 0, getWidth(), getHeight()); super.paintComponent(g); paintBezier(g); } } }; private Line2D[] lines = new Line2D[6]; private final Ellipse2D[] marks; private Path2D path; private final JSlider sliderDuration = createSlider(1, 20, 2, "Duration in seconds", 9, 1); private final JSlider sliderStep = createSlider(8, 128, 64, "Animation steps", 16, 1); private Path2D totalCurve; { marks = new Ellipse2D[curvePoints.length + 1]; for (int index = 0; index &lt; marks.length; index++) { marks[index] = new Ellipse2D.Double(); } } private void createGUI() { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(demoComponent, BorderLayout.CENTER); JToolBar toolBar = new JToolBar(); toolBar.add(animationButton); toolBar.add(sliderStep); toolBar.add(sliderDuration); frame.add(toolBar, BorderLayout.PAGE_START); frame.pack(); frame.setLocation(150, 150); frame.setVisible(true); } private JSlider createSlider(int min, int max, int value, String title, int major, int minor) { JSlider slider = new JSlider(min, max, value); slider.setBorder(BorderFactory.createTitledBorder(title)); slider.setMajorTickSpacing(major); // slider.setMinorTickSpacing(minor); slider.setPaintLabels(true); slider.setPaintTicks(true); return slider; } private void paintBezier(Graphics g) { Path2D path1 = this.path; if (path1 != null) { Graphics2D g2 = (Graphics2D) g; g2.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY); g2.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE); g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2.setColor(Color.GREEN); for (Shape mark : marks) { g2.fill(mark); } g2.setStroke(new BasicStroke(2f)); g2.setColor(Color.BLACK); for (Shape mark : marks) { g2.draw(mark); } g2.setStroke(new BasicStroke(0f)); g2.draw(totalCurve); g2.setStroke(new BasicStroke(1f)); g2.setColor(Color.RED); g2.draw(path1); g2.setStroke(new BasicStroke(.5f)); g2.setColor(Color.BLACK); for (Line2D line : lines) { if (line != null) { g2.draw(line); } } } } private void recalculateAfterResize(int w, int h) { curvePoints = new Point2D[]{new Point2D.Double(10, h / 4.0), new Point2D.Double(w - 10, 10), new Point2D.Double(w - 10, h - 10), new Point2D.Double(10, h - h / 4.0)}; totalCurve = new Path2D.Double(); totalCurve.moveTo(curvePoints[0].getX(), curvePoints[0].getY()); totalCurve.curveTo(curvePoints[1].getX(), curvePoints[1].getY(), curvePoints[2].getX(), curvePoints[2].getY(), curvePoints[3].getX(), curvePoints[3].getY()); for (int index = 0; index &lt; curvePoints.length; index++) { marks[index].setFrame(curvePoints[index].getX() - 5, curvePoints[index].getY() - 5, 10, 10); } marks[marks.length - 1].setFrame(marks[0].getFrame()); for (int index = 0; index &lt; curvePoints.length - 1; index++) { lines[index] = new Line2D.Double(curvePoints[index], curvePoints[index + 1]); } lines[3] = null; lines[4] = null; lines[5] = null; animator.init(); } } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. PODrawing curve bit by bit
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USmKorbel
    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
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

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