Coverflow issue -- FAST while dragging, SLOW otherwise!

I've been hitting Google every now and then for the last couple of years to try and figure out a problem I'm having with iTunes Cover Flow -- but it's a strange one so I've had no luck finding an answer.
The problem is with the speed/frame rate. When using the keyboard left/right keys, clicking on an artist in the song list, clicking on the next or previous cover art, or using the forward/back arrows at the ends of the cover flow scroll bar, the animation is consistently sluggish and stuttered.
HOWEVER (and this is where it gets weird)...
If I click/hold/drag the horizontal scroll bar in cover flow -- no matter how slow or fast -- the animation immediately skyrockets and I get completely smooth motion.
I can consistently duplicate this and have confirmed the frame rates with FRAPS using both very large and very small libraries (hundreds of albums w/art vs about 10 albums w/ art). It is much more noticeable in full-screen mode.
FRAPS values
*Cover flow within the full iTunes UI*
Dragging scrollbar: 75fps (consistent, even with crazy dragging)
All other methods: 40-42fps (even when coverflow is minimize to a tiny size)
*Cover flow full-screen mode*
Dragging scrollbar: 75fps (again consistent, even with crazy dragging)
All other methods: 27-30fps
Does anyone have any idea why this happens? It's been driving me crazy! I love browsing albums visually but this has always bothered me, especially full-screen. I would love it if someone else using a PC could test this so I know whether or not it's my hardware configuration.
It's worth noting that my CPU sits at rock-bottom idle in both scenarios, so it's not a spike issue.
Basic specs:
- Windows 7 Ultimate x64 (tho it happened in XP as well)
- Intel Core 2 Duo E8500
- 8GB DDR2 RAM
- NVIDIA GeForce 9600 GT
THANKS!

As I posted in another thread, when I'm using Safari, even low resolution youtube videos are not streaming properly - whereas they are playing adequately using Firefox.
However, with Firefox even the high resolution videos (HD) are not playing smoothly.
I cannot say for sure, but I think this is related to the fact that the PowerPC processors in our computers are part of an older technology that is being phased out - not to mention Apple is not entirely supporting PowerPC software anymore.

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Hi Folks,
I am getting the following error while dragging the model table on to the diagram tab(creating an interface).
Any Ideas??????
java.lang.NullPointerException
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Did you tryed to refresh your model or delete and re-import it ?

'Show JInternalFrame Contents While Dragging'

hi,
I have a question I have an application that has internal frames, Basically it is a MDI Application. I am using JDK 1.2.2 and windows 2000. The question is that when you go to the desktop right click properties and in Effects tab you uncheck the 'Show Window Contents While Dragging' checkBox. Now when I run my application and my parent window that is a frame pops up, if I drag the window i.e. my parent frame it doesn't dragg the contents onlt thw windows border is dragged, means it doesn't repaints that is fine. But when I try to drag one of the internal frame it shows me the contents inside the internalFrame being dragged too and I don't want to see these contents while internal frame is being dragged. So how can I make my application not to show the contents inside the JInternalFrames not to be shown while dragging the JInternalFrame. Any help is really appreciated.
for an example I have added a code example to see the effect that I got from the forums just for an example to show. If you have unchecked the option 'Show Window Contents While Dragging' in Effects tab when you go to the desktop right click properties and the Effects Tab or in the controlPanel dblClick Display and go to Effects tab and uncheck this checkBox. Now run this example and see when you drag the main window contents inside it including JInternalFrame doesn't get dragged just the boundry of the dragging frame is shown. Now if you try to drag the JInternalFrame. Contents inside that are dragged too. And I don't want this behavior. I don't want to see the contents.
/*************** MDITest ************/
import javax.swing.*;
* An application that displays a frame that
* contains internal frames in an MDI type
* interface.
* @author Mike Foley
public class MDITest extends Object {
* Application entry point.
* Create the frame, and display it.
* @param args Command line parameter. Not used.
public static void main( String args[] ) {
try {
UIManager.setLookAndFeel(
"com.sun.java.swing.plaf.windows.WindowsLookAndFeel" );
} catch( Exception ex ) {
System.err.println( "Exception: " +
ex.getLocalizedMessage() );
JFrame frame = new MDIFrame( "MDI Test" );
frame.pack();
frame.setVisible( true );
} // main
} // MDITest
/*********** MDIFrame.java ************/
import java.awt.*;
import java.awt.event.*;
import java.io.Serializable;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
* A top-level frame. The frame configures itself
* with a JDesktopPane in its content pane.
* @author Mike Foley
public class MDIFrame extends JFrame implements Serializable {
* The desktop pane in our content pane.
private JDesktopPane desktopPane;
* MDIFrame, null constructor.
public MDIFrame() {
this( null );
* MDIFrame, constructor.
* @param title The title for the frame.
public MDIFrame( String title ) {
super( title );
* Customize the frame for our application.
protected void frameInit() {
// Let the super create the panes.
super.frameInit();
JMenuBar menuBar = createMenu();
setJMenuBar( menuBar );
JToolBar toolBar = createToolBar();
Container content = getContentPane();
content.add( toolBar, BorderLayout.NORTH );
desktopPane = new JDesktopPane();
desktopPane.setPreferredSize( new Dimension( 400, 300 ) );
content.add( desktopPane, BorderLayout.CENTER );
} // frameInit
* Create the menu for the frame.
* <p>
* @return The menu for the frame.
protected JMenuBar createMenu() {
JMenuBar menuBar = new JMenuBar();
JMenu file = new JMenu( "File" );
file.setMnemonic( KeyEvent.VK_F );
JMenuItem item;
file.add( new NewInternalFrameAction() );
// file.add( new ExitAction() );
menuBar.add( file );
return( menuBar );
} // createMenuBar
* Create the toolbar for this frame.
* <p>
* @return The newly created toolbar.
protected JToolBar createToolBar() {
final JToolBar toolBar = new JToolBar();
toolBar.setFloatable( false );
toolBar.add( new NewInternalFrameAction() );
// toolBar.add( new ExitAction() );
return( toolBar );
* Create an internal frame.
* A JLabel is added to its content pane for an example
* of content in the internal frame. However, any
* JComponent may be used for content.
* <p>
* @return The newly created internal frame.
public JInternalFrame createInternalFrame() {
JInternalFrame internalFrame =
new JInternalFrame( "Internal JLabel" );
internalFrame.getContentPane().add(
new JLabel( "Internal Frame Content" ) );
internalFrame.setResizable( true );
internalFrame.setClosable( true );
internalFrame.setIconifiable( true );
internalFrame.setMaximizable( true );
internalFrame.pack();
return( internalFrame );
* An Action that creates a new internal frame and
* adds it to this frame's desktop pane.
public class NewInternalFrameAction extends AbstractAction {
* NewInternalFrameAction, constructor.
* Set the name and icon for this action.
public NewInternalFrameAction() {
super( "New", new ImageIcon( "new.gif" ) );
* Perform the action, create an internal frame and
* add it to the desktop pane.
* <p>
* @param e The event causing us to be called.
public void actionPerformed( ActionEvent e ) {
JInternalFrame internalFrame = createInternalFrame();
desktopPane.add( internalFrame,
JLayeredPane.DEFAULT_LAYER );
} // NewInternalFrameAction
} // MDIFrame
I'll really appreciate for any help.
Thank you

try this:
JDesktopPane desktopPane = new JDesktopPane();
desktopPane.putClientProperty("JDesktopPane.dragMode", "outline");Both parameters passed to 'putClientProperty' must be strings.
Hope this helps
Riz

How to show MouseOver effect on dropable region while dragging a MovieClip?

Hello friends,
I am creating Drag and drop flash application.
While dragging an instance of a movieclip I want also the dropable region to show effect like MouseOver case.
So that end user can confirm that they are dropping the item in right region.
Here the mouse is moved while it is kept clicked
Plz help me,
Thanks.
Venkat

Thanks for taking interest.
I did the first part of your reply already, but How to check if a MovieClip is being dragged?
Say, I have two MovieClips
TargetToDrop_mc
DropableRegion_mc
TargetToDrop_mc.addEventListener(MouseEvent.MOUSE_DOWN, gotMouseDown);
TargetToDrop_mc.addEventListener(MouseEvent.MOUSE_UP, gotMouseUp);
TargetToDrop_mc.addEventListener(MouseEvent.MOUSE_OVER, gotMouseOver);
TargetToDrop_mc.addEventListener(MouseEvent.MOUSE_OUT, gotMouseOut);
DropableRegion_mc.addEventListener(MouseEvent.MOUSE_DOWN, gotMouseDown);
DropableRegion_mc.addEventListener(MouseEvent.MOUSE_UP, gotMouseUp);
DropableRegion_mc.addEventListener(MouseEvent.MOUSE_OVER, gotMouseOver);
DropableRegion_mc.addEventListener(MouseEvent.MOUSE_OUT, gotMouseOut);
function gotMouseDown(EventReceived:MouseEvent):void {
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function gotMouseUp(EventReceived:MouseEvent):void{
    EventReceived.currentTarget.stopDrag();
function gotMouseOver(EventReceived:MouseEvent):void{
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function gotMouseOut(EventReceived:MouseEvent):void{
    EventReceived.currentTarget.alpha=0.7;
Now plze guide me on basis of above.
Thanks,
Venkat

How to get the filepath while dragging

Hi all ,
I am performing a file copying application I wanted to know how to get the path of the particular file while dragging. (i.e if I perform something like a mousedown or mouseover event I should be able to get the complete path of the filename.
Reply,
Kalpesh

You can drag the file name into the application, or use something like PathSnagger
G4 Digital Audio 1.4GHz Mac OS X (10.4.9)

High CPU consumption with repaint while dragging

Hi! I certainly hope someone can help me with this. I am building a graphical user interface for a graph with custom nodes and edges, the nodes being draggable. I have tried making each network component (node or edge) a JComponent. Now, I'm trying using only one JPanel to paint all the components. Either way, I find that dragging takes up too much CPU % especially when using full screen graphics, usually around 92%. And that is on a machine with >1.9GHz.
It does not really make much of a difference when I paint outlines of the components while dragging. Any ideas about this? Thanks.
My runnable test code is rather long so I've uploaded it to : http://web.mit.edu/jabos/www/SyncTest/GUILoad2.java.
-Bosun

Comments about changes to your code:
1 - trouble in rendering with setOpaque(false). Set this to true and add super.paintComponent(g) in paintComponent to take care of background paint updates
2 - had to doctor your ConnComp class; the constructor was under construction...
3 - I'm using j2se 1.4 so I converted your:
ArrayList generics to the old Object casts and
the JFrame setPreferredSize to setSize
This runs okay now. The highest cpu usage numbers I saw were 52% in full screen and 37% in regular mode (2.6 GHz).
The painting part seems okay; I think the trouble is in excessive data storage and manipulation. I would re–design your program to eliminate all the type checking with the instanceof operator. Specifically I would try to use only one ArrayList for the node objects and draw the connection lines between them inside paintComponent depending on how a boolean is set, eg if(showLines). As an aside, GradientPaint is for fill operations and will not benefit your line display.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.util.ArrayList;
* This demo paints all network components in a single JComponent
* @author jabos
public class DragTest extends JPanel {
     * all components
    public ArrayList comps;
    public ArrayList compsDragged; // actually only RectComps
     * arraylist of all connection components
    public ArrayList conncomps;
    public boolean dragging = false, repaintWhileDragging = true;
    Point2D initp = null;
    public JLabel repaintDrag;
    public DragTest() {
        repaintDrag = new JLabel("repaintWhileDragging : " + repaintWhileDragging);
        repaintDrag.setForeground(Color.MAGENTA);
        add(repaintDrag);
        add(new JLabel("Press \"R\" to change repaint protocols during dragging"));
        comps = new ArrayList();
        compsDragged = new ArrayList();
        conncomps = new ArrayList();
        addMouseMotionListener(new MouseMotionAdapter() {
            public void mouseDragged(MouseEvent e) {
                //* // Remove initial slash to disable repainting while dragging
                if (repaintWhileDragging) {
                    Point2D pp = e.getPoint();
                    AffineTransform t = AffineTransform.getTranslateInstance(
                                                pp.getX() - initp.getX(),
                                                pp.getY() - initp.getY());
                    initp = pp; // reset initp
                    for (int j = 0; j < compsDragged.size(); j++) {
                        Comp comp = (Comp)compsDragged.get(j);
                        if (comp instanceof RectComp)
                            comp.updateCompLocation(t);
                    // and again to update ConnComps
                    for (int j = 0; j < conncomps.size(); j++) {
                        Comp comp = (Comp)conncomps.get(j);
                        if (comp instanceof ConnComp)
                            comp.updateCompLocation(t);
                    dragging = true;
                    repaint();
                dragging = true;
        addMouseListener(new MouseAdapter() {
            // does final repaint if dragging just finished
            public void mouseReleased(MouseEvent e) {
                if (dragging) {
                    Point2D pp = e.getPoint();
                    AffineTransform t = AffineTransform.getTranslateInstance(
                                                pp.getX() - initp.getX(),
                                                pp.getY() - initp.getY());
                    for (int j = 0; j < compsDragged.size(); j++) {
                        Comp comp = (Comp)compsDragged.get(j);
                        if (comp instanceof RectComp)
                            comp.updateCompLocation(t);
                    // and again to update ConnComps
                    for (int j = 0; j < conncomps.size(); j++) {
                        Comp comp = (Comp)conncomps.get(j);
                        if (comp instanceof ConnComp)
                            comp.updateCompLocation(t);
                repaint();
                dragging = false;
                setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
            // Updates list of components being dragged
            public void mousePressed(MouseEvent e) {
                compsDragged.clear();
                initp = e.getPoint();
                for (int j = 0; j < comps.size(); j++) {
                    Comp comp = (Comp)comps.get(j);
                    if (comp.graphic.contains(initp))
                        compsDragged.add(comp);
                setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
        addKeyListener(new KeyAdapter() {
            public void keyReleased(KeyEvent e) {
                if(e.getKeyCode() == KeyEvent.VK_R) {
                    repaintWhileDragging = !repaintWhileDragging;
                    repaintDrag.setText("repaintWhileDragging : " +
                                         repaintWhileDragging);
//        setOpaque(false);
        setFocusable(true);
        requestFocusInWindow();
    public static void main(String[] args) {
        GraphicsDevice device =
            GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
        JFrame f = new JFrame("GUILOAD2", device.getDefaultConfiguration());
        //* // remove initial slash to disable full screen
        device.setFullScreenWindow(SwingUtilities.getWindowAncestor(f));
        //needs to be set AFTER fullscreenmode so that the toolbar is NOT draggable!
        f.setExtendedState(JFrame.MAXIMIZED_BOTH);
            // enable use of Look and Feel
            f.setUndecorated(true);    // Set false, EE is still minimizable
            f.getRootPane().setWindowDecorationStyle(JRootPane.FRAME);
        f.setBounds(GraphicsEnvironment.getLocalGraphicsEnvironment().
                            getMaximumWindowBounds());
        DragTest p = new DragTest();
        p.setBackground(Color.WHITE);
        RectComp[] rc = new RectComp[100];
        int n = -1, x = 30, y = 30, b = 100, inc = 40;
        // add REctComps
        for (int i = 0; i < 10; i++) {
            p.add(rc[++n] = new RectComp(new Point2D.Double(x += inc, y += inc),
                                         new Color(x % 255, y % 255, (b += 10) % 255)));
        x = 34; y = 32; b = 32;
        // add ConnComps
        while (n > 0) {
            p.add(new ConnComp(rc[n--], rc[n],
                               new Color((x += inc) % 255, (y += inc) % 255,
                                         (b += inc) % 255),
                               new Color((x += inc) % 255, (y += inc) % 255,
                                         (b += inc) % 255)));
        f.setContentPane(p);
        f.setSize(700, 700);
        makeFramex(f, false);
        /* // remove initial slash to disable full screen; Also, uncomment above
        f.setResizable(false);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setIgnoreRepaint(true);
        f.setVisible(true);
    public static void makeFramex(JFrame frame, boolean resizable) {
        frame.setSize(frame.getSize());
//        frame.setResizable(resizable);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//        frame.pack();
        frame.setVisible(true);
     * Adds network component c to this simulation
     * @param c
    public void add(Comp c) {
        comps.add(c);
        if (c instanceof ConnComp) {
            conncomps.add((ConnComp)c);
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2D = (Graphics2D) g;
        g2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                             RenderingHints.VALUE_ANTIALIAS_ON);
        for (int j = 0; j < comps.size(); j++) {
            Comp comp = (Comp)comps.get(j);
            //for (Comp i : dragging ? compsDragged : comps) {
            try {
                g2D.setPaint(comp.color);
                if (comp instanceof ConnComp) {
                    g2D.setStroke(((ConnComp) comp).compStroke);
                    g2D.draw(comp.graphic);
                if (comp instanceof RectComp)
                    g2D.fill(comp.graphic);
            } catch (Exception e) {
                e.printStackTrace(); //To change body of catch statement
                                      // use File | Settings | File Templates.
     * A network component that simulates a node
    private static class RectComp extends Comp {
        RectComp(Point2D centero, Paint c) {
            super(c);
            center = centero;
            graphic = new Ellipse2D.Double(center.getX() - radius,
                              center.getY() - radius, radius * 2 - 2, radius * 2 - 2);
        public void updateCompLocation(AffineTransform t) {
            graphic = t.createTransformedShape(graphic);
            Rectangle2D r = graphic.getBounds2D();
            center = new Point2D.Double(r.getCenterX(), r.getCenterY());
            //System.out.println("newCenterX=" + r.getCenterX());
     * A network component that simulates a connection between two nodes
    private static class ConnComp extends Comp {
        Stroke compStroke;
        RectComp origin, destination;
        Paint color;
        ConnComp(RectComp origino, RectComp desto, Color c1, Color c2) {
            super(c1);
            if (c2 != null)
                color = new GradientPaint(origino.center, c1, desto.center, c2);
            else
                color = c1;
            graphic = new Line2D.Double(origino.center, desto.center);
            this.origin = origino;
            this.destination = desto;
            compStroke = new BasicStroke(3);
//            updateCompLocation(new AffineTransform());
        public void updateCompLocation(AffineTransform t) {
            ((Line2D)graphic).setLine(origin.center, destination.center);
            if(color instanceof GradientPaint)
                color = new GradientPaint(((Line2D)graphic).getP1(),
                                          ((GradientPaint)color).getColor1(),
                                          ((Line2D)graphic).getP2(),
                                          ((GradientPaint)color).getColor2());
            //System.out.println("newLineX:" + ((Line2D) graphic).getX1() +
            //                     "---" + ((Line2D) graphic).getX2());
     * demo Superclass for all network components
    private abstract static class Comp {
        Point2D center;
        Shape graphic;
        int radius = 20;
        Paint color;
        Comp(Paint c) {
            color = c;
         * Updates internal parameters of Comp necessary for correct repaint
         * @param t
        public abstract void updateCompLocation(AffineTransform t);
}

Why i am unable to select between 2 anchor points with in a object while dragging with direct select

why i am unable to select between 2 anchor points with in a object while dragging with direct selection tool instead it moves

Another option is to temporarily change your view to outline mode, when your done switch back to preview mode. Ctrl-Y or View>Outline {View>Preview} The menu option will change depending on which mode you are in.
And another option, double click on the object in question to place it in Isolation mode. You can now edit to your hearts content. When done, click on the gray border at top of document.
So as you can see there are multiple ways of accomplishing the same thing.

Executing Java script while dragging a component

Hi,
Is there a way to execute Java script while dragging a component, I have noticed only following events mouseMove, mouseOut, mouseDown mouseUp for clientListener tag. could not find anything related to dragging event.
My scenario is, I have componentDragSource to a component and I want fire a java script event on drag of that component.
Please suggest. TIA.
Thanks,
Siva G.

Hi Frank,
Thanks for your response.
Could you please give me some sample on that like what type of event and on which component I have to set clientListener.
Thanks,
Siva G.

PNG for a WEB: "None/Fast" or "Smallest/Slow"?

I need to do for a WEB many PNG icons (aprox. 70x70 pixels e/a). There will be like 20 of them loaded in the WEB at the same time.
PLEASE, which kind of compression I should pick when I save as a PNG: "None/Fast" or "Smallest/Slow", and "Interlaced" or not?
My main concern is that the WEB page should load them the fastest possible.
Thank you in advance !

Smallest/Slow seems the best choice (I think the "slow" part refers to how long it will take to save, not load) I haven't found a browser that doesn't deal with that setting. I never use Interlaced myself; gone are the days when pages paint pixels before your very eyes.
Consider saving from within the Save For Web feature, which can be configured to save no additional metadata and no color profile.
Consider also just trying the different settings, then looking at the files yourself. That's how those giving advice have likely learned the best settings.
-Noel

Coverflow issue -- FAST while dragging, SLOW otherwise!

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