Mouse Drag Issues.

I've been having problems with using my mouse to "click and drag". I'm pretty sure that is is not a hardware issue. It happens in multiple apps and general OS navigation. For example I will attempt to click and drag a folder into another. I wont be able to because the mouse wont stop the drag after I let go of the button. The folder icon gets stuck to the mouse pointer, I have to force quit and relaunch Finder using the keyboard's enter key because I cant use the mouse click to force quit.
The same thing happens in other applications. ie. Im browsing the web. Occasionally when I click a link, an outline drag will get stuck to the mouse. Then I can't click anywhere else to make use of the browser until I force quit it and start over. This happened in an unsaved photoshop document too. In that case I got a large outline drag box stuck to the mouse, and the entire app froze up. Couldn't save with keyboard or mouse, had to force quit and loose my work. That's when I started looking to fix this problem and came here.
Im using the wireless logitech s530 keyboard/mouse combo. I've been using it without a hitch for the last 6 months that I've had my Mac.
Also a side note, I had a fatal error screen (which I've never seen before) for the operating system a couple days ago, for which it instructed me to hold the power button to restart. I don't know if its related but it happened around the same time this mouse/crashing problem started.
Any help would be greatly appreciated.
-Bob Funk

This sounds like a driver issue. Have you tried reinstalling your mouse's driver or checking for an update on the Logitech website? I'd recommend visiting their downloads site and install the latest driver for your mouse. Hopefully that will work. One way to test this would be to boot into safe mode by holding "shift" at bootup. When the system boots see if the mouse behaves the same way, and then restart the computer normally to restore normal non-safemode function.

Similar Messages

Mouse drag issue when out of boundary

In one of my tasks for my flash project I am working on, I prompt a user to drag an orb/marble across one end of a tube into another. The functionality is all working correctly, except for one issue I have tried and tried to find a fix for. If the user starts dragging the marble, then raises the mouse above/below or anyway outside of the boundary, the mouse continues to move the object as the mouse is moved (in this case, only horizontally) if this makes any sense.
What I want is for the marble to not move and stop dragging if the mouse is moved outside of the boundary. My code for this frame is listed below:
stop();
next_btn.visible = false;
//remove Child instances from previous frame
removeChild(hearts_mc);
removeChild(diamonds_mc);
removeChild(clubs_mc);
removeChild(spades_mc);
marble_mc.buttonMode = true;
marble_mc.addEventListener(MouseEvent.MOUSE_DOWN, moveMarble);
marble_mc.addEventListener(MouseEvent.MOUSE_UP, dropMarble);
marble_mc.addEventListener(MouseEvent.MOUSE_MOVE, dragMarble);
reply_txt.text ="Drag the marble to the right side of the tube.";
function moveMarble(event:MouseEvent):void {
    //set boundaries of Rectangle (x,y,width,height)
    event.target.startDrag(true, new Rectangle(54,184,486,0));
function dropMarble(event:MouseEvent):void {
    event.target.stopDrag();
function dragMarble(event:MouseEvent):void {
    //check if marble has reached right side of tube
    if (marble_mc.x >= 540){
        event.target.stopDrag();
    //remove event listeners after task is complete
    event.target.removeEventListener(MouseEvent.MOUSE_DOWN, moveMarble);
    event.target.removeEventListener(MouseEvent.MOUSE_UP, dropMarble);
    event.target.removeEventListener(MouseEvent.MOUSE_MOVE, dragMarble);
    next_btn.visible = true;
    reply_txt.text ="Great job!";
    marble_mc.buttonMode = false;
       } else if (marble_mc.x > 54 && marble_mc.x <= 539 ){
        reply_txt.text ="Keep going!";

Hm, I think i solved my own problem after staring at it a bit longer (my head is probably spinning circles at this point). My changes made are in bold.
stop();
next_btn.visible = false;
//remove Child instances from previous frame
removeChild(hearts_mc);
removeChild(diamonds_mc);
removeChild(clubs_mc);
removeChild(spades_mc);
marble_mc.buttonMode = true;
marble_mc.addEventListener(MouseEvent.MOUSE_DOWN, moveMarble);
marble_mc.addEventListener(MouseEvent.MOUSE_UP, dropMarble);
stage.addEventListener(MouseEvent.MOUSE_MOVE, dragMarble);
reply_txt.text ="Drag the marble to the right side of the tube.";
function moveMarble(event:MouseEvent):void {
    //set boundaries of Rectangle (x,y,width,height)
    event.target.startDrag(true, new Rectangle(54,184,486,0));
function dropMarble(event:MouseEvent):void {
    event.target.stopDrag();
function dragMarble(event:MouseEvent):void {
    var xCoord:Number = stage.mouseX
    var yCoord:Number = stage.mouseY
    //track x/y coordinates of mouse on stage
    //trace(xCoord);
    //trace(yCoord);
    if (xCoord <= 26 || yCoord <= 152 || yCoord >= 209){
        this.stopDrag();
    //check if marble has reached right side of tube
    if (marble_mc.x >= 540){
      this.stopDrag();
    //remove event listeners after task is complete
    event.target.removeEventListener(MouseEvent.MOUSE_DOWN, moveMarble);
    event.target.removeEventListener(MouseEvent.MOUSE_UP, dropMarble);
    event.target.removeEventListener(MouseEvent.MOUSE_MOVE, dragMarble);
    next_btn.visible = true;
    reply_txt.text ="Great job!";
    marble_mc.buttonMode = false;
       } else if (marble_mc.x > 54 && marble_mc.x <= 539 ){
        reply_txt.text ="Keep going!";

Move tool issue : Command key + mouse dragging for moving any layer not working in PS CC

I'm trying to move a layer within the document by holding command key and mouse dragging (mouse cursor not above the layer) is not working at all while using move tool. Suddenly this functionality stopped working. Now I have to place my cursor on layer to be move and drag with mouse. Also pressing command key changing auto select option from layer to group.
Please help.

Usually when a tool is not working as expected, a Reset of that tool might be the answer.
Select the move tool in the toolbox,
Go to the move tool icon on the top left of the screen (just above the toolbox in its' Option bar) and Ctrl-click on it to get the Reset menu.
Click on Reset Tool.

Mouse Drag is not working in Applets

In our application we are using applets in containing in IFRAMES in IE to display different type of graphs and animations etc. User can open/close these Applets and iframes to navigate from one data view to other. During this navigation sometimes mouse drag event stops and all drag related operations like scrolls etc stops responding to drag operations in all applets in same JVM.
My investigation shows that swing component hierarchy gets corrupted somehow and this exception is thrown
EventMulticaster.eventDispatched(Toolkit.java:2244)
     at java.awt.Toolkit.notifyAWTEventListeners(Toolkit.java:2203)
     at java.awt.Component.dispatchEventImpl(Component.java:4528)
     at java.awt.Container.dispatchEventImpl(Container.java:2099)
     at java.awt.Component.dispatchEvent(Component.java:4460)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4603)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4255)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
     at java.awt.Container.dispatchEventImpl(Container.java:2085)
     at java.awt.Component.dispatchEvent(Component.java:4460)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
peerComponents in Container class is returning null on call to getLocationOnScreen that causes this exception.
I fixed the issue in awt library but ORACLE license terms don't allow redistribution of modified version of awt.
Please help me fix this issue in applet code or suggest me to bypass license restrictions.
Thanks in advance!
Luqman

877922 wrote:
peerComponents in Container class is returning null on call to getLocationOnScreen that causes this exception.
I fixed the issue in awt library but ORACLE license terms don't allow redistribution of modified version of awt.Something Oracle do allow is to raise a bug report. On that report they invite you to post a work-around or fix. That would be the place to put the fix you have devised. Oracle will (supposedly) fix it, then you (and everyone else) can enjoy the fix as a free upgrade in the next version.
They also offer 'support contracts' (AFAIU) in which you might pursue your own immediate fixes. But raise the bug report anyway.

Mouse panning issues in Flipview

Hi,
I have a problem in mouse panning issues in WinJS Flipview control.
Here is my sample:
https://skydrive.live.com/redir?resid=533F417A2E04AEC4!1009
My problem is: I can zoom images in flipview and panning, zooming or scrolling them via finger touch.
So, is there a simple way to enable mouse panning, scrolling?
I think it is useless to zoom if the user cannot drag image by mouse if there is no touch device.
Thanks so much.
Nick

I think adding MSGesture is a fine idea. What you're experiencing here is just a difference in the native workings of touch and mouse, so you have to manually compensate for these differences.
Because panning and pinch/zoom in touch mode give you behaviors that are not directly translatable to mouse actions, the mouse does not interpret similar actions unless you ask it do.
Panning with a finger is the most natural thing to expect for touchmode, but it does not directly translate into click and drag, and for that reason, mouse does not pan. However, you can just add the event so that you get the same behavior. It's
extra work, but you have to take into account that not all developers want the same behavior. For example, I expect that someone will say "I don't want to pan when I touch the screen, I want to draw a line, like I can with a mouse. How do
I disable this behavior?"
I hope this clears things up for you.
Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.
NOTE: If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined
objects and unknown namespaces.

Bug: lost selection after a mouse drag

To reproduce:
- select many entities in a diagram
- move them a bit via mouse drag
what happens
- the group loses focus. If you've been unfortunate, you've selected non-contiguous entities (via CTRL-click over) and now they are somewhere in the diagram, behind other entities, etc. and you can't move them back because you lost the group selection.
what should happen
- after the move, the group is still selected
Edited by: T. on Jun 6, 2011 5:06 AM

I have seen this too. I discovered that once they are all selected (ctrl-A) you need to be careful to then click inside one of the entities to do the drag otherwise it does get messed up. Undo fixes it sometimes. Other times I have exited without saving to get back to a previous arrangement.

Mouse clicking issues

For the last 2 weeks or so I all of a sudden have mouse clicking issues on a 2009 iMac. The mouse (I have tried 3 different ones from apple and Logitech) seem to be able to open files etc. on a click. I have to click repeatedly to get it done. When I run the disc utility it mostly goes away. Now, I run the disc repair every morning to make it go away. Annoying. I have seen other people having similar issues - it sounds like a OS issue????

This same scenario has happened to me sporadically over the past few months and seems to be increasing. I have the Logitech Cordless Optical Mouse for Notebooks. Got it 3 years ago for use with my G4 PowerBook (1.5 GHz, 2 GB RAM, OS 10.4.8). First I thought it was the batteries, but then realized that if I'd just wait a few minutes the problem would usually go away. Nothing new electrical on my desk that would cause it. Gets really annoying. The mouse becomes sluggish and the clicks are non responsive (a right click will open a sub-menu window, but then no other clicks work. Trying to move the mouse around on the screen gives spotty results - stops and starts - as if I'm moving it on a reflective surface. After multiple clicks the window goes away. I can disconnect the USB transmitter and have complete control with the mousepad.
Sometimes the problem won't occur all day long. Other times it comes and goes multiple times during an hour. A restart will usually get it out of that overly annoying loop.
I bought a new Logitech Mouse a few days ago, thinking mine was wearing out, but the same thing happened within minutes.
I can only think there's some conflict with an OSX update. VERY frustrating. I don't want to go back to a wired mouse.
So I, too, am eager for a solution.
Thanks,
-Scott
PowerBook G4, 15 in., 1.5 GHz Mac OS X (10.4.8) 2 GB RAM; 2 LaCie 250 GB FW drives; 1 LaCie 500 GB FW drive

Mouse Focus Issues

hi,
Are there any known mouse focus issues in r12 (r12.6) ?
we have couple of users who have these problems. this isn't with all but few of them.
thanks,
jazz

Jazz,
Review the following documents, and see if it helps.
Note: 457136.1 - On R12 Application, Randomly The Mouse Navigation Stops Working
https://metalink2.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=457136.1
Note: 468724.1 - Rel 12 : Mouse Cursor Is Frozen (Loss Of Focus In Applet) After Minimizing And On Restoring the Form To Normal Size
https://metalink2.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=468724.1
Note: 824000.1 - Unable to Use Mouse Cursor After Accessed on Folder Tools box
https://metalink2.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=824000.1
Regards,
Hussein

Mouse Drag in JDialog produces Mouse Enter & Mouse Exit events in JFrame.

Hi, all.
Do I have a misconception here? When I drag the mouse in a modal JDialog, mouseEntered and mouseExited events are being delivered to JComponents in the parent JFrame that currently happens to be beneath that JDialog. I would not have expected any events to be delivered to any component not in the modal JDialog while that JDialog is displayed.
I submitted this as a bug many months ago, and have heard nothing back from Sun, nor can I find anything similar to this in BugTraq.
Here is sample code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
* This class demonstrates what I believe are TWO bugs in Mouse Event handling in Swing
* 1.1.3_1, 1.1.3_2, 1.1.3_3, and 1.4.0.
* 1) When a MODAL JDialog is being displayed, and the cursor is DRAGGED from the JDialog
*    into and across the parent JFrame, Mouse Enter and Mouse Exit events are given to
*    the parent JFrame and/or it's child components. It is my belief that NO such events
*    should be delivered, that modal dialogs should prevent ANY user interaction with any
*    component NOT in the JDialog. Am I crazy?
*    You can reproduce this simply by running the main() method, then dragging the cursor
*    from the JDialog into and across the JFrame.
* 2) When a MODAL JDialog is being displayed, and the cursor is DRAGGED across the JDialog,
*    Mouse Enter and Mouse Exit events are given to the parent JFrame and/or it's child
*    components. This is in addition to the problem described above.
*    You can reproduce this by dismissing the initial JDialog displayed when the main()
*    method starts up, clicking on the "Perform Action" button in the JFrame, then dragging
*    the cursor around the displayed JDialog.
* The Mouse Enter and Mouse Exit events are reported via System.err.
public class DragTest
    extends JFrame
    public static void main(final String[] p_args)
        new DragTest();
    public DragTest()
        super("JFrame");
        WindowListener l_windowListener = new WindowAdapter() {
            public void windowClosing(final WindowEvent p_evt)
                DragTest.this.dispose();
            public void windowClosed(final WindowEvent p_evt)
                System.exit(0);
        MouseListener l_mouseListener = new MouseAdapter() {
            public void mouseEntered(final MouseEvent p_evt)
                System.err.println(">>> Mouse Entered: " + ((Component)p_evt.getSource()).getName() );
            public void mouseExited(final MouseEvent p_evt)
                System.err.println(">>> Mouse Exited: " + ((Component)p_evt.getSource()).getName() );
        JPanel l_panel1 = new JPanel();
        l_panel1.setLayout( new BorderLayout(50,50) );
        l_panel1.setName("JFrame Panel");
        l_panel1.addMouseListener(l_mouseListener);
        JButton l_button = null;
        l_button = new JButton("JFrame North Button");
        l_button.setName(l_button.getText());
        l_button.addMouseListener(l_mouseListener);
        l_panel1.add(l_button, BorderLayout.NORTH);
        l_button = new JButton("JFrame South Button");
        l_button.setName(l_button.getText());
        l_button.addMouseListener(l_mouseListener);
        l_panel1.add(l_button, BorderLayout.SOUTH);
        l_button = new JButton("JFrame East Button");
        l_button.setName(l_button.getText());
        l_button.addMouseListener(l_mouseListener);
        l_panel1.add(l_button, BorderLayout.EAST);
        l_button = new JButton("JFrame West Button");
        l_button.setName(l_button.getText());
        l_button.addMouseListener(l_mouseListener);
        l_panel1.add(l_button, BorderLayout.WEST);
        l_button = new JButton("JFrame Center Button");
        l_button.setName(l_button.getText());
        l_button.addMouseListener(l_mouseListener);
        l_panel1.add(l_button, BorderLayout.CENTER);
        JButton l_actionButton = l_button;
        Container l_contentPane = this.getContentPane();
        l_contentPane.setLayout( new BorderLayout() );
        l_contentPane.add(l_panel1, BorderLayout.NORTH);
        JPanel l_panel2 = new JPanel();
        l_panel2.setName("JDialog Panel");
        l_panel2.addMouseListener(l_mouseListener);
        l_panel2.setLayout( new BorderLayout(50,50) );
        l_panel2.add( new JButton("JDialog North Button"), BorderLayout.NORTH );
        l_panel2.add( new JButton("JDialog South Button"), BorderLayout.SOUTH );
        l_panel2.add( new JButton("JDialog East Button"),   BorderLayout.EAST   );
        l_panel2.add( new JButton("JDialog West Button"),   BorderLayout.WEST   );
        l_panel2.add( new JButton("JDialog Center Button"), BorderLayout.CENTER );
        final JDialog l_dialog = new JDialog(this, "JDialog", true);
        WindowListener l_windowListener2 = new WindowAdapter() {
            public void windowClosing(WindowEvent p_evt)
                l_dialog.dispose();
        l_dialog.addWindowListener(l_windowListener2);
        l_dialog.setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
        l_dialog.getContentPane().add(l_panel2, BorderLayout.CENTER);
        l_dialog.pack();
        Action l_action = new AbstractAction() {
            { putValue(Action.NAME, "Perform Action (open dialog)"); }
            public void actionPerformed(final ActionEvent p_evt)
                l_dialog.setVisible(true);
        l_actionButton.setAction(l_action);
        this.addWindowListener(l_windowListener);
        this.pack();
        this.setLocation(100,100);
        this.setVisible(true);
        l_dialog.setVisible(true);
}(Too bad blank lines are stripped, eh?)
Thanks in advance for any insights you may be able to provide.
---Mark

I guess we can think of this as one problem. When mouse dragged, JFrame also (Parent) receives events. If i understood correctly, what happens here is, Modal dialog creates its own event pump and Frame will be having its own. See the source code of Dialog's show() method. It uses an interface called Conditional to determine whether to block the events or yield it to parent pump.
Here is the Conditional code and show method code from java.awt.dialog for reference
package java.awt;
* Conditional is used by the EventDispatchThread's message pumps to
* determine if a given pump should continue to run, or should instead exit
* and yield control to the parent pump.
* @version 1.3 02/02/00
* @author David Mendenhall
interface Conditional {
    boolean evaluate();
/////show method
    public void show() {
        if (!isModal()) {
            conditionalShow();
        } else {
            // Set this variable before calling conditionalShow(). That
            // way, if the Dialog is hidden right after being shown, we
            // won't mistakenly block this thread.
            keepBlocking = true;
            if (conditionalShow()) {
                // We have two mechanisms for blocking: 1. If we're on the
                // EventDispatchThread, start a new event pump. 2. If we're
                // on any other thread, call wait() on the treelock.
                if (Toolkit.getEventQueue().isDispatchThread()) {
                    EventDispatchThread dispatchThread =
                        (EventDispatchThread)Thread.currentThread();
                       * pump events, filter out input events for
                       * component not belong to our modal dialog.
                       * we already disabled other components in native code
                       * but because the event is posted from a different
                       * thread so it's possible that there are some events
                       * for other component already posted in the queue
                       * before we decide do modal show.
                    dispatchThread.pumpEventsForHierarchy(new Conditional() {
                        public boolean evaluate() {
                            return keepBlocking && windowClosingException == null;
                    }, this);
                } else {
                    synchronized (getTreeLock()) {
                        while (keepBlocking && windowClosingException == null) {
                            try {
                                getTreeLock().wait();
                            } catch (InterruptedException e) {
                                break;
                if (windowClosingException != null) {
                    windowClosingException.fillInStackTrace();
                    throw windowClosingException;
    }I didn't get exactly what is happening but this may help to think further

Consuming extra mouse drag events?

Hi,
In my mouse drag listener, there is a bit heavy processing that can take slightly long time (doing some real time computation). If I move the mouse fast, then there would be a long pause before processing catch up.
So my question is that if it is possible to remove some mouse drag events in the queue s.t. my computation only takes on the latest drag event.
I tried java.awt.Toolkit.getDefaultToolkit().getSystemEventQueue().peekEvent(), but it always returns null.
Anyone could give a hint? Thanks a lot.

This heavy processing should be done in a new thread and not the event thread. If the event thread is busy processing, it's not going to be able to respond to drag events. Once you do that, it would be easy to set a flag in that thread to notify it to stop processing and start with new values.

Default implementation of mouse drag event?

Is there any Default implementation of mouse drag event?
Say if the developer does not override and implement mouse drag event, still when the frame is dragged, the frame gets repainted itself in the new position. It indicates some default implementation of mouse drag event, but am unable to find out where it has been implemented.
Why bother when everything works fine? I have a requirement to move my non-modal dialog when the frame is being dragged to another location. I tried adding mousemotionlistener to the frame, to the panel inside a frame, but the event does not reach my custom implementation of mousedrag event.
Any clues?

Moving the frame is a different listener: ComponentListener; add one to the frame. The frame's window decorations are OS territory, so I'm not sure if there's system dependence. I seem to vaguely remember some systems sending an event only after done moving, while others send the event as the frame moves.

Mouse drag, hand tool not working at all!

So I've installed Photoshop CC 2014 and Illustrator CC 2014 on my computer, started a new file but only found that any action that includes mouse dragging - creating shapes, hand tool, pen tool - do not work at all, everything just do not respond, when creating a shape it will treat it as if I have clicked once (which pops out the create rectangle window for size input..), the same situation happens to Photoshop as well (perhaps all Adobe CC software). I've been trying everything that have been suggested on the forum (some from the links below): removing all other software at the background (spotify, 1password, etc). Also I've tried with using different sets of keyboard and mouse, either wired and wireless, still no luck. One situation that finally works is that all software work perfectly fine in safe mode, then I rebooted back to normal mode, try killing any background process that was not running in safe mode, still...not working at all...
References:
(Illustrator CS6) Spacebar stops working seemingly randomly
Spacebar Shortcut: Hand Tool Not Showing and Not Working
Illustrator gets stuck on hand tool
My computer specs:
Windows 7 Pro 64-bit
Intel Core i3-4130 3.4Ghz
4GB RAM

wecon,
You could try to reinstall using the full three step way:
Uninstall, run the Cleaner Tool, and reinstall.
http://www.adobe.com/support/contact/cscleanertool.html

Mouse dragged event with unexpected coordinates

I am dragging the mouse on a half circle from the middle left to the top middle. This results in mouse events with the coordinates form (10,90) ->(100,10)
Letting the mouse go and then dragging it further to the left, the coordinates in the of the event are similar than the starting point of the first mouse drag event.
Can anyone shed some light on this peculiar behavior?

First of, I have to apologize for the example not being as minimalistic as it might be, but on the plus side, I know now why this happens, I just don't know how to work around it.
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
package javafxtest;
import java.util.ArrayList;
import javafx.application.Application;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Dimension2D;
import javafx.geometry.Point2D;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Polygon;
import javafx.scene.shape.Rectangle;
import javafx.scene.shape.Shape;
import javafx.scene.transform.Rotate;
import javafx.stage.Stage;
* @author andi
public class HandleRotation extends Application {
    private DoubleProperty currentRotation;
    private ArrayList<Double> angles;
    @Override
    public void start(Stage primaryStage) {
        currentRotation = new SimpleDoubleProperty(this, "currentRotation", 10);
        SteeringWheelGroup background = new SteeringWheelGroup(200);
        background.setManaged(false);
        Group g = new Group(background);
        final Point2D centerPoint = new Point2D(100, 100);
        angles = new ArrayList<>(3);
        angles.add(190.0);
        angles.add(270.0);
        angles.add(350.0);
        double step = (180.0 - 2 * currentRotation.doubleValue()) / (angles.size() - 1);
        int radius = 100;
        final int yTranslation = 15; // might be due to the labels
        Polygon handle = createHandle(centerPoint, radius, yTranslation);
        g.getChildren().add(handle);
        StackPane root = new StackPane();
        Scene scene = new Scene(g, 300, 250);
        primaryStage.setTitle("Handle Rotation!");
        primaryStage.setScene(scene);
        primaryStage.show();
     * Calculate the base point for the label. This is the point on the arc, matching the angle.
     * @param center point of the circle
     * @param radius radius of the circle
     * @param angle in degree in [0,180]
     * @return Point on the circle
    Point2D calculateBasePoint(Point2D center, double radius,
            double angle) {
        float newX = (float) (center.getX() + radius * Math.cos(Math.toRadians(angle)));
        float newY = (float) (center.getY() + radius * Math.sin(Math.toRadians(angle)));
        return new Point2D(newX, newY);
     * Create the polygon that represents the handle
     * @param centerPoint
     * @param radius
     * @return
    private Polygon createHandle(final Point2D centerPoint, int radius, final int yTranslation) {
        double baseAngle = 180;
        Point2D p1 = calculateBasePoint(centerPoint, radius, baseAngle - 5);
        Point2D p2 = calculateBasePoint(centerPoint, radius, baseAngle + 2);
        Point2D p3 = calculateBasePoint(centerPoint, radius*0.65, baseAngle + 2);
        Point2D p4 = calculateBasePoint(centerPoint, radius*0.65, baseAngle - 7);
        double[] points = {p1.getX(), p1.getY(), p2.getX(), p2.getY(), p3.getX(), p3.getY(), p4.getX(), p4.getY()};
                  Polygon polygon = new Polygon(points);
//        polygon.setOpacity(0);
        polygon.setTranslateY(-yTranslation);
        final Rotate rotationTransform = new Rotate(currentRotation.doubleValue(), centerPoint.getX(), centerPoint.getY());
        polygon.getTransforms().add(rotationTransform);
        polygon.setOnMouseDragged(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent event) {
                if (event.getY() < centerPoint.getY()) {
System.out.println("Event: "+event);
                                                   Point2D point = new Point2D((float)event.getX(), (float)event.getY());
                    double newAngle = angleBetween2Lines(centerPoint, point);
                    if (newAngle < 0) {
                        newAngle = (90 + newAngle)+ 90;
System.out.println("Set angle on mouse drag: "+newAngle);
                    if (newAngle < 10) {
                        newAngle = 10;
                    if (newAngle > 170) {
                        newAngle = 170;
                    currentRotation.set(newAngle);
        polygon.setOnMouseReleased(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent event) {
                snapToNearestAngle();
                rotationTransform.setAngle(currentRotation.doubleValue());
        return polygon;
     * Snap to the correct angle. Correct angle is angle belonging to the nearest label.
    void snapToNearestAngle() {
        double currentAngle = currentRotation.doubleValue() + 180;
        double currentMin = 360;
        int minIndex = 0;
System.out.println("Current rotation is "+currentAngle);
        for (int i = 0; i < angles.size(); i++) {
            double angle = angles.get(i);
            double diff = Math.abs(angle - currentAngle);
            if (diff < currentMin) {
                currentMin = diff;
                minIndex = i;
System.out.println("new minDifference at "+i+": "+diff);
        Double destinationAngle = angles.get(minIndex);
System.out.println("DestinationAngle is "+currentAngle+" -> "+(destinationAngle - 180));
        if (destinationAngle < 180 + 10 || destinationAngle > 360 - 10) {
            throw new IllegalStateException("Angle is out of range: "+currentRotation.doubleValue()+" -> "+destinationAngle);
        currentRotation.set(destinationAngle - 180);
     * Calculate the angle between the vector horizontally to the left from the center
     * and the current point.
     * @param center point
     * @param point current point
     * @return angle in degree
    double angleBetween2Lines(Point2D center, Point2D point) {
        double slope2 = calculateSlope(center, point);
        double angle = Math.atan(slope2);
        if (point.getX() > center.getX()) {
            angle += Math.PI/2;
System.out.println("Slope: "+slope2+" angle "+Math.toDegrees(angle));
        return Math.abs(Math.toDegrees(angle));
     * Caluculate the slope of the line defined by two points.
     * The first point is the center of a circle and the second
     * point roughly lies on the circle.
     * @param center point
     * @param point on the circle
     * @return slope of the connecting line.
    double calculateSlope(Point2D center, Point2D point) {
System.out.println("center="+center+",point="+point);
        double absSlope = Math.abs((point.getY() - center.getY()) / (point.getX() - center.getX()));
        if (point.getY() > center.getY()) {
            if (point.getX() > center.getX()) {
                // bottom right
                return -absSlope;
            } else {
                // bottom left
                return absSlope;
        } else {
            if (point.getX() > center.getX()) {
                // top right
                return absSlope;
            } else {
                // top left
                return -absSlope;
     * The main() method is ignored in correctly deployed JavaFX application.
     * main() serves only as fallback in case the application can not be
     * launched through deployment artifacts, e.g., in IDEs with limited FX
     * support. NetBeans ignores main().
     * @param args the command line arguments
    public static void main(String[] args) {
        launch(args);
   private class SteeringWheelGroup extends Group {
        public SteeringWheelGroup(int destinationWidth) {
            int topPadding = 0;
            Rectangle rect = new Rectangle(getImageWidth(), getImageWidth(), Color.RED);
            double scale = destinationWidth / rect.getWidth();
            rect.setScaleX(scale);
            rect.setScaleY(scale);
            Circle circle = new Circle(getImageWidth()/2, getImageWidth()/2, getImageWidth()/2, Color.BLUE);
            circle.setScaleX(scale);
            circle.setScaleY(scale);
            Group rotationGroup = new Group(/*rect,*/ circle);
            rotationGroup.setManaged(false);
            int width = getImageWidth();
            Rectangle clipRectangle = new Rectangle(0, 0, width, width / 2);
            Circle clipCircle = new Circle(width / 2, width / 2, width / 2);
            Shape clip = Shape.intersect(clipRectangle, clipCircle);
            rotationGroup.setClip(clip);
            this.getChildren().add(rotationGroup);
            //double h = calculateHeigthOverHorizon(angle, destinationWidth/2);
            //setTranslateY(-h+topPadding);
        public final int getImageWidth() {
            return 479;
Here is how you can reproduce my effect:
Grab the black handle
Drag the mouse top and right until you approach the angle -90 (have an eye out on the console log)
Let the mouse go: the handle will snap to 90 degree
Grab the handle a second time and move further right
You will see that the angle printed out do not match what you expect.
Let the mouse go, the Handle snaps back to it's original position
As the rotation does not happen around the polygon's center, I have to use a Rotaion effect, which is applied. While I can drag the shape from the rotated location the dragging is always measured from its base position.
So what can I do to work around this?
final Rotate rotationTransform = new Rotate(currentRotation.doubleValue(), centerPoint.getX(), centerPoint.getY());
polygon.getTransforms().add(rotationTransform);
If worse comes to worst, I can use a circular handle covering everything, then I can rotate around its center, but I would like to avoid this.

Scroll JTable in Scrollpane with mouse drag

Hello developers !
I'm trying to make a scrollable Jtable. The table have to be scrollable with the mouse drag event. But I have a "flashing" Problem. I can catch the Mouse events from the table (I'm listener the mouse motion and mouse events).
When I receive a new mouse drag event, I set the new position from the viewport. The problem is, that the Table flash:
For example:
I drag the mouse to the bottom of the table. The mouse "y" position have to increase, but it doesn't:
first motion event position (10, 10)
second motion event position (10, 15)
third motion event position (10, 12)
etc..
The position of the mouse event are in relation of the component position. I think, the problem is that I change the position of the view port and than the new mouse event is "on a wrong reference".
Could someone help me? How could I make a work around for this Problem?

I have the solution... it is easy.
I post the solution because i spent two days making working around (changing viewport position other scrollbar values, etc).
You dont need to implement the Autoscroll interface. The Autoscroll interface is for Drag and Drop classes.
The key was the function JTable#scrollRectToVisible....
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
public class ScrollableTableFrame extends JFrame{
protected ScrollableTable table;
public ScrollableTableFrame() {
    super("Scrollable Table");
    setSize(600, 300);
    String data[][] = new String[40][40];
    String header[] = new String[40];
    for(int i = 0; i < 40; i++){
      header[i] = "Header " + i;
      for(int j = 0; j < 40; j++){
        data[i][j] = "(" + i + ", " + j +")";
    ScrollableTable table = new ScrollableTable(data, header);
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
    JScrollPane sp = new JScrollPane();
    sp.getViewport().setBackground(table.getBackground());
    sp.getViewport().add(table);
    getContentPane().add(sp, BorderLayout.CENTER);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(400, 400);
    setVisible(true);
public static void main(String args[]){
    new ScrollableTableFrame();
class ScrollableTable extends JTable{
private Point firstPressedPoint;
public ScrollableTable(Object rowData[][], Object columnNames[]){
    super(rowData, columnNames);
protected void processMouseEvent(MouseEvent e){
    int id = e.getID();
    switch(id) {
      case MouseEvent.MOUSE_PRESSED:
        firstPressedPoint = e.getPoint();
        break;
      case MouseEvent.MOUSE_RELEASED:
        firstPressedPoint = null;
        break;
      case MouseEvent.MOUSE_CLICKED:
      case MouseEvent.MOUSE_EXITED:
      case MouseEvent.MOUSE_ENTERED:
    super.processMouseEvent(e);
protected void processMouseMotionEvent(MouseEvent e){
    if(e.getID() == MouseEvent.MOUSE_DRAGGED){
      Rectangle r = getVisibleRect();
      Point p = e.getPoint();
      int dx = (firstPressedPoint.x-p.x);
      int dy = (firstPressedPoint.y-p.y);
      Rectangle aRect = new Rectangle(r.x + dx, r.y + dy , r.width + dx, r.height + dy);
      scrollRectToVisible(aRect);
}P.S.: jarshe, thank you for your help !!

Simulating mouse drag events?

Hi all,
I am wrinting unit tests for my swing application. For one test I want to simulate a drag event over a panel. I have tried JFCUnit, but does not seem to work for this, so I am trying to write my own.
I create 3 mouse events and post them on the system event queue. A mouse press event, a mouse drag event and a mouse release event. MouseEvent's do let you specify a drag start and a drag end point in their constructor. So I have tried using both, but neither works.
Am I doing anything wrong? The component I'm operating on gets the mouse pressed and mouse released events, but thats all.
any help much appreciated,
Justin

I tried using the Robot class alright, but it does really wierd things. I sometimes doesn't work for simulating dragging events. I have a component that you can drag anywhere on the screen using the mouse, without having to use the titlebar. I am trying to test this dragging, but with the robot class, it looks like it goes into an infinate recursion. The mouseDragged method gets executed thosands of times, and you can see the panel shifting from its origional position to the new position and back again for a few seconds. Could be a bug in Robot class.

Mouse Drag Issues.

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