[news.eclipse.platform.swt] Re: Use handle passed from Java to Native...

["Steve Northover" <steve_northover@xxxxxxxxxx>]

Not sure exactly which handle you want or what you are trying to do.
Obviously, you needed C code on Windows to do it and you needed the HWND of
the shell which you were able to find.  On Motif, I don't know exaclty what
X/Xt/Xm handle you are after but if you pass in the handle of a Shell, this
is an Xt Widget and you can use XtParent() to repeatedly get the parent of
the handle until you see an Xt Widget that is the handle of the
TopLevelShell.  Use XtIsSubclass() to test each parent until you find one
that is "shellWidgetClass".  At this point, you will have the Xt Widget that
represents the shell.  If you need the X window, call XtWindow().

All of this is done in platform specific C code and none of this really has
anything to do with SWT.

"Greg Roberts" <gwrobert@xxxxxxxxxx> wrote in message
news:b9ts97$dpv$1@xxxxxxxxxxxxxxxx
> I can do that, get the parents - but that again returns a Widget (int
> value/pointer) and that is where my problem is. I don't know what I am
> able to do with that value that will allow me to get a hold of the actual
> Widget, or determine type or whatever. I am probably sounding really
> stupid but this is my first experience using this and am having a
> difficult time grasping it. Hopefully I am making some sort of sense as to
> what my problem is. I have the Widget (passed in) that is a window and I
> want to be able to do stuff to that window. What do I need to do with the
> value I have to get to work on the actual component?
>
> thank you for the previous answer.
>
>
> Steve Northover wrote:
>
> > Use XtParent() in the C code to climb up the parent chain until you see
a
> > TopLevelShell.
>
> > "Greg Roberts" <gwrobert@xxxxxxxxxx> wrote in message
> > news:b9thjl$1ko$1@xxxxxxxxxxxxxxxx
> > > We are writing an eclipse plug-in that is going to allow us to
lock-down
> > > our desktop window. In the Java code I am getting all of the workbench
> > > windows and then I am grabbing the one I want and calling
> > > getShell().handle on it. I can pass that handle down to the native
code
> > > using JNI and in Windows I can use that handle and cast it to a HWND
and
> > > have controll of that window in the native code. In Linux this does
not
> > > work. The Shell handle is not the same as the XLib or Motif
> > > Windows/Widgets. So I am wondering if you know of anyway to use the
> > > getShell() method from the org.eclipse.swt.widgets.shell class so that
I
> > > can pass a handle down to Motif/Xlib and use that to be able to
control
> > > the window. Previously I was using Xlib and was getting a handle on
the
> > > window by cycling through all windows and looking for the window name.
> > > That is no longer possible however because we are not going to know
what
> > > the window name will be any longer - i18n.
> > >
> > > Any assistance would be greatly appreciated.
> > >
> > > thank you,
> > > Greg Roberts
> > > IBM
> > > gwrobert@xxxxxxxxxx
> > >
>
>
>
>
>