Re: [isabelle] Isabelle2014-RC3: mouse offset and C-hover issue

Dear Makarius,

thanks for the reminder (I already forgot that this is caused by the JDK) and thanks for the hint.

I did not try your suggestion with OpenJDK yet since the issue disappeared with RC4, but I'll keep it in mind for the future.



On 08/18/2014 05:06 PM, Makarius wrote:
On Thu, 14 Aug 2014, Christian Sternagel wrote:

To be more precise (I'm on Fedora 20 x86_64 with Gnome): When I start
Isabelle/jEdit for the first time its window does not use the full
screen size (at this point menus and C-hover still works). So I
usually double-click on the title bar in order to make the window as
big as the screen. After that the mouse-pointer has an offset for all
menus (i.e., I have to point somewhat lower and more to the right of
the screen in order to "hit" with the mouse). That alone would not be
so bad. But also now C-hover does not work anymore. More specifically,
the word I point at is still highlighted by a gray rectangle, as
usual, but no popup shows up.

I have tried this briefly with the OpenJDK 7u65 variant that is
presently provided by Fedora 20, and it seems to work a bit better --
testing only for 10min.

To switch the JDK version, you merely need to add something like this in


Or any other directory that is produced by the java package
installation. That directory is supposed to contain a standard JAVA_HOME
layout, but this is only approximative here, due to the inevitable

The above only works for "isabelle jedit" command-line use.  The
toplevel Isabelle app takes its jdk from $ISABELLE_HOME/contrib/jdk via
the shell script (which may be also changed, of course).


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