Re: Running Java application with drag and drop support in cygwin

[Dees <deepali dot shefali at gmail dot com>]

Any update?

On Wed, Dec 23, 2009 at 6:26 PM, Dees <deepali.shefali@gmail.com> wrote:
>
> People, any clue? Struggling really hard.
>
> On Fri, Dec 18, 2009 at 11:23 AM, Dees <deepali.shefali@gmail.com> wrote:
> > Hi Jon,
> >
> > Did you get a chance to look at this?
> > From whatever posts available online, I could not get a clue what is
> > going wrong.
> > Please respond.
> >
> > Thanks,
> > Shefali
> >
> > On Mon, Dec 14, 2009 at 12:12 PM, Dees <deepali.shefali@gmail.com> wrote:
> >> On Fri, Nov 13, 2009 at 8:26 PM, Jon TURNEY <jon.turney@dronecode.org.uk> wrote:
> >>> On 30/10/2009 09:06, Dees wrote:
> >>>>
> >>>> Your reply is much appreciated Jon. I will try to be more specific
> >>>> about the problem in further mails.
> >>>>
> >>>> On Thu, Oct 29, 2009 at 8:11 PM, Jon TURNEY<jon.turney@dronecode.org.uk>
> >>>>  wrote:
> >>>>>
> >>>>> On 28/10/2009 05:57, Dees wrote:
> >>>>>>
> >>>>>> I have developed a Java application involving jTree with extensive
> >>>>>> drag and drop support, which runs correctly in my Linux box. However,
> >>>>>> when I switch to a windows box and access the same Linux box using
> >>>>>> cygwin x-server, the drag and drop in jTree stops working.
> >>>>>> Interestingly, rest of the application still works fine. After
> >>>>>> analyzing a bit I found that x-server is able to recognize the drag
> >>>>>> event but fails to recognize a drop event.
> >>>>>
> >>>>> Details?
> >>>>
> >>>> OS : Suse Linux Enterprise Server 10 (i586)
> >>>> Version : 10
> >>>> Patch level : 3
> >>>> Other version information:
> >>>> Java : JDK 5
> >>>> Cygwin setup-version: 2.573.2.3
> >>>> Also tried using Xming 6.9.0.31 ssh same Linux setup from Windows, but
> >>>> that also doesn't solve the problem.
> >>>>
> >>>>>
> >>>>>> Is there any setting, which should be done prior to running the Java
> >>>>>> swing applications?
> >>>>>>
> >>>>>> Here is a sample code which behaves in exactly same way.
> >>>>>> http://www.java2s.com/Code/Java/Swing-JFC/TreeDragandDrop.htm
> >>>>>
> >>>>> I have no idea how to use that java code to reproduce the problem you are
> >>>>> seeing.
> >>>>
> >>>> Using the above java code in Linux:
> >>>> 1. Download and Install Java Development Toolkit on your Linux box
> >>>> (Java sun download site:
> >>>> http://java.sun.com/javase/downloads/index.jsp), if you do not have it
> >>>> already.
> >>>> 2. Save the sample code in the above link with the file name
> >>>> TreeTester.java, say in /home/user/
> >>>> 3. Navigate to TreeTester.java from shell, and compile the java code:
> >>>>        # cd /home/user/
> >>>>        # /usr/java/jdk1.5.0_14/bin/javac TreeTester.java
> >>>>    Ignore any warnings of deprecated APIs.
> >>>> 4. This will create a few .class files in /home/user/ directory. Final
> >>>> step is to run the Java code, using:
> >>>>        # /usr/java/jdk1.5.0_14/bin/java -classpath . TreeTester
> >>>>    This will open up a GUI, with a jTree each on left and right pane.
> >>>> You can drag and drop any of the leaf nodes from one jTree to the root
> >>>> node of the other jTree and this should add a new node in the other
> >>>> jTree. You will get messages on console for the operations being
> >>>> performed. Now ssh the same box using cygwin/xming from any other
> >>>> windows box, and run the application using command in step 4. You
> >>>> should be able to drag (a small icon will come under cursor indicating
> >>>> that something is being dragged) but when you will drop it, the new
> >>>> node would not be added to the tree. Thats where lies my problem!!!
> >>>
> >>> Thanks for the test case and instructions, this makes it much easier for me
> >>> to try it out.
> >>>
> >>> However, this testcase and your jar archive both work fine for me (using
> >>> Xserver 1.7.1-3)!
> >>>
> >>>>>> May be my problem is related to some setting. Though, not sure.
> >>>>>> Has anybody come across something similar? What should be done then?
> >>>>>> Please let me know.
> >>>>>
> >>>>> No it's probably a bug in Cygwin/X.  But you're going to need to be a lot
> >>>>> more specific about the problem before any progress can be made on fixing
> >>>>> it.
> >>>
> >>>> Also, putting some debug messages in the code lets me conclude that
> >>>> it's the drop event which is not being recognized, as the main control
> >>>> never reaches there.
> >>>
> >>> There is not really any drop event, as far as the X server is concerned,
> >>> just mouse click and motion events, which are passed on to you application
> >>> (which has a framework to interpret them as dragging and dropping an item).
> >>>
> >>> Now having a better idea of the problem, it seems less likely it is an
> >>> Xserver bug at all.  The only Xserver cause I can think of would be if it
> >>> was somehow not sending the correct events to your applications window,
> >>> which you could test using xev -id <your applications window id> (you can
> >>> use xwininfo to find the window id)
> >>>
> >> I have tried this, but could not get any idea if any event is going wrong.
> >> Here is the output of xev -id 0xe00021 (only for drag and drop event):
> >>
> >> LeaveNotify event, serial 13, synthetic NO, window 0xe00021,
> >>    root 0x5a, subw 0xe00025, time 3560250, (87,65), root:(91,95),
> >>    mode NotifyGrab, detail NotifyVirtual, same_screen YES,
> >>    focus YES, state 256
> >>
> >> FocusOut event, serial 13, synthetic NO, window 0xe00021,
> >>    mode NotifyGrab, detail NotifyAncestor
> >>
> >> EnterNotify event, serial 13, synthetic NO, window 0xe00021,
> >>    root 0x5a, subw 0xe00025, time 3565375, (212,48), root:(216,78),
> >>    mode NotifyUngrab, detail NotifyVirtual, same_screen YES,
> >>    focus YES, state 0
> >>
> >> KeymapNotify event, serial 13, synthetic NO, window 0x0,
> >>    keys:  90  0   0   0   0   0   0   0   0   0   0   0   0   0   0   0
> >>           0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0
> >>
> >> FocusIn event, serial 13, synthetic NO, window 0xe00021,
> >>    mode NotifyUngrab, detail NotifyAncestor
> >>
> >> KeymapNotify event, serial 13, synthetic NO, window 0x0,
> >>    keys:  0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0
> >>           0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0
> >>
> >> LeaveNotify event, serial 13, synthetic NO, window 0xe00021,
> >>    root 0x5a, subw 0xe00025, time 3569046, (205,211), root:(209,241),
> >>    mode NotifyNormal, detail NotifyNonlinearVirtual, same_screen YES,
> >>    focus YES, state 0
> >>
> >> Does the window 0x0 in two events in the log(above) signify anything
> >> misbehaving?
> >> Your reply is much awaited and appreciated.
> >>
> >>
> >>> --
> >>> Jon TURNEY
> >>> Volunteer Cygwin/X X Server maintainer
> >>>
> >>
> >

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