Hi Alan
I do not completely understand the need of using a mutex in the qt driver
however
without any change in the actual driver approach it is easy to allow the
driver to work well within a qt app and also in any other c or c++ program
if in the file qt.cpp function bool initQtApp( bool isGUI )
we add after the ++appCounter; line (line 90)
the instruction
if(appCounter == 1 && qApp != NULL) ++appCounter;
this will prevent the call
delete qApp;
when one closes the driver within a qt application, that would crash teh
application, and it does not conflict with the actual behavior of the qt
driver it onnly takes account for the fact that there is a qApp that was
not started by the driver.
cheers,
On Mon, Dec 17, 2018 at 6:59 AM António Rodrigues Tomé <art...@gmail.com>
wrote:
> Hi Alan
> Glad to be of some help.
> Really that empty string in family name especially when the matchof name
> is not an exact match could have strange results and could vary from system
> to system.
> In order for me to use qt drivers, as all my applications are qt based, I
> still need different things as I want to be able to call any of the qt
> drivers from within a qt appication. For now if I redefine two functions to
> doing nothing in my main.ccp file before int main(int argc, char *argv[])
>
>
> bool initQtApp( bool isGUI )
>
> {
>
>
> }
>
>
> void closeQtApp()
>
> {
>
>
> }
> It seems to work but i still need to check if there is not leak memory
> with this approach.
> In the future probably it would be nice if the drivers automatically
> could work from within a qt application.
>
> cheers,
>
>
> On Mon, Dec 17, 2018 at 1:41 AM Alan W. Irwin <alan.w.irwin1...@gmail.com>
> wrote:
>
>> On 2018-12-16 10:13-0000 António Rodrigues Tomé wrote:
>>
>> > Hi all
>> > I found no evidence of fontconfig not being working properly in my
>> system.
>> > so I've made a small test instead of setting font family to null string
>> > I've set it to a bogus name.
>> > f.setFamily( "BOUGUSTRASHFAMILY" ); // no family name, forcing Qt to
>> find
>> > an appropriate font by itself
>> > and in x01c example as there are four plots i edited the source to add
>> > the plfont(1); before plot 1, plfont(2); before plot 2,
>> > plfont(3); before plot 3, plfont(4); before plot 4, I also get erase
>> the
>> > esc text sequence that put title always in Roman.
>> > The results are what one would expected.
>>
>> Hi António:
>>
>> I agree, that one-line change seems to have solved all qt device
>> driver issues on your platform. So I tried the equivalent here, and
>> it solves some less obvious Qt issues here for examples 23 and 24 that
>> have been around for quite a while. So congratulations on finding a
>> solution to a PLplot qt device driver bug that has apparently been around
>> since the
>> very first development of that device!
>>
>> I commited a small variation (I added commentary and I replaced your
>> bogus family name because it was [barely] conceivable a valid font
>> might adopt that family name) of your fix as of
>> plplot-5.14.0-8-gdb9d90d0b. So please test that commit (by using git
>> checkout plplot-5.14.0-8-gdb9d90d0b before building PLplot from the
>> git version) to make sure it answers all your qt device needs (other
>> than character size).
>>
>> @Everybody:
>>
>> This fix is pretty crucial for our qt device driver because it appears
>> to fix all long-standing font problems (including character alignment
>> for António) for that device driver. Therefore, I intend to release
>> 5.14.1
>> with this fix and any other critical fixes that show up in the next few
>> weeks.
>>
>> More about the git process I should use to create a bug-fix release
>> (such as the proposed 5.14.1) in my next post.
>>
>> Alan
>> __________________________
>> Alan W. Irwin
>>
>> Programming affiliations with the FreeEOS equation-of-state
>> implementation for stellar interiors (freeeos.sf.net); the Time
>> Ephemerides project (timeephem.sf.net); PLplot scientific plotting
>> software package (plplot.sf.net); the libLASi project
>> (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
>> and the Linux Brochure Project (lbproject.sf.net).
>> __________________________
>>
>> Linux-powered Science
>> __________________________
>>
>
>
> --
>
> António Rodrigues Tomé
> Universidade da Beira Interior
> Instituto D. Luís (lab associado)
> email address:
> art...@gmail.com
> art...@ubi.pt
> http://www.researcherid.com/rid/A-5681-2013
>
>
--
António Rodrigues Tomé
Universidade da Beira Interior
Instituto D. Luís (lab associado)
email address:
art...@gmail.com
art...@ubi.pt
http://www.researcherid.com/rid/A-5681-2013
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