Re: [Interest] Qt and MSVC 2017

[Mike Jackson]

In theory the 2015 will work as MS did not change the C/C++ runtime with 
VS2017. This is a theory of course.


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Igor Mironchik <mailto:igor.mironc...@gmail.com>
April 29, 2017 at 9:06 AM
Hello,

In what version of Qt will be added official binaries for MSVC 2017?

Thank you.

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Re: [Interest] Which "Widget" technology to use when starting a new desktop app

[Mike Jackson]

André Pönitz wrote:

On Thu, Jan 05, 2017 at 04:03:56PM +0100, Jason H wrote:

After watching the webinar "The Curse of Choice: An overview of GUI
technologies in Qt?"[1] I am even more confused as to what to use for
our new desktop app. Here are a few of the background details. The app
will be cross platform to desktop systems, not embedded at all. The app
will be displaying some "image" data from hdf5 files and performing some
"real" time basic image manipulations (gamma corrections, coloring of
data) on that data. The app will eventually call out to some existing
libraries to perform some long running analysis/simulations. We are
currently using Qt 5.6.2 due to its long term maintenance guarantees.

In the past I have used QGraphics* classes to show images and perform
basic zoom, save, compositing functions but the webinar makes it pretty
clear NOT to use those classes any more. The webinar seems to push QML
and the Qt Quick classes as the way forward for desktop apps. One of the
issues that we might have with QML is the need to apply styling to those
widgets, none of us are UX/Styling experts by any stretch of the
imagination. I took a look at QOpenGLWidget to display/manipulate the
images so that we get an accelerated canvas to use. That looked
promising in combination with traditional QWidgets.

I would like to hear other peoples experiences&  suggestions as to what
they are doing. I don't want to write the app and then have to figure
out how to port it to another Qt technology in a year or so after our
funding has run out.


The mantra is to use QML.


Definitely not true for the kind aof applications the OP describes.

Anndre'


After reviewing the responses and doing some more research online we 
decided to stick with the traditional QWidgets for our desktop app but 
get away from the QGraphics* classes and replace that older code with 
code based on QOpenGlWidget so we can get accelerated 2D rendering.


Thanks all for your responses and suggestions.

Mike Jackson
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Re: [Interest] Which "Widget" technology to use when starting a new desktop app

[Mike Jackson]

Jason H wrote:



Sent: Thursday, January 05, 2017 at 11:19 AM From: "Bob
Hood"<bho...@comcast.net> To: interest@qt-project.org Subject: Re:
[Interest] Which "Widget" technology to use when starting a new
desktop app

On 1/5/2017 8:51 AM, william.croc...@analog.com wrote:

On 01/05/2017 10:29 AM, Bob Hood wrote:

On 1/5/2017 8:03 AM, Jason H wrote:

The mantra is to use QML.

I just wrote a wonderful utility using Qt 5.6.2 and Widgets for
the desktop, and there's no hint of QML in it.  It functions
beautifully, is easily maintainable, and even has full
animations.

I don't think the mantra is QML.  The mantra is: Look at your
need, your goal, and choose the Qt technology that best fits
it. If that's QML, fine. If that's Widgets, fine.  Unless Qt
reps step up here and support your statement (which will have
ramifications for me and, I'm sure, many others), summarily
stating to somebody that they should use QML as the primary
tech for a new desktop app is, I think, dogmatic, at best, and
continues to fuel the anxiety that Qt is pouring all the love
into a QML/mobile focus.

... you mean, it isn't ?


Certainly, it would seem to be the case, but if that's also an
official position, then I'd appreciate a representative of Qt
stepping up and saying so publicly.  I would have decisions to make
concerning my project's commercial license, and my product's future
direction, based upon it.


Well with the QtQuick Controls 2 of 5.7, I think the future is
slanted to QML. Having extensively coded in both, I do prefer QML,
though I still wax nostalgic over Widgets. Those layouts were amazing
and I wasn't plagued with binding loops for width or height. (The
implicitHeight/implicitWidth vs actual height/width vs preferred
(from Widgets)  is still a rough edge that needs to worked out.
There's not consistency on implicits vs actual vs others (painted).

QML is almost "there" in terms of it's original dream of having
Designers worry about appearance while letting the Engineers be
decoupled to focus on the logic. I think I'm one intermediate
QtObject away from being able to do that.

I've also used PyQt to do a precurosr to QML w.r.t the ease of a
scripting language but being able to use Qt's widgets. QML satisfies
that niche, and is sufficiently supported.



Does the upcoming Qt 5.8 solve any of these issues? Do you find the 
"Built in" styles acceptable for applications or do you end up bringing 
in a UX engineer to style the components?


Thanks
Mike Jackson

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[Interest] Which "Widget" technology to use when starting a new desktop app

[Mike Jackson]

After watching the webinar "The Curse of Choice: An overview of GUI 
technologies in Qt?"[1] I am even more confused as to what to use for 
our new desktop app. Here are a few of the background details. The app 
will be cross platform to desktop systems, not embedded at all. The app 
will be displaying some "image" data from hdf5 files and performing some 
"real" time basic image manipulations (gamma corrections, coloring of 
data) on that data. The app will eventually call out to some existing 
libraries to perform some long running analysis/simulations. We are 
currently using Qt 5.6.2 due to its long term maintenance guarantees.


In the past I have used QGraphics* classes to show images and perform 
basic zoom, save, compositing functions but the webinar makes it pretty 
clear NOT to use those classes any more. The webinar seems to push QML 
and the Qt Quick classes as the way forward for desktop apps. One of the 
issues that we might have with QML is the need to apply styling to those 
widgets, none of us are UX/Styling experts by any stretch of the 
imagination. I took a look at QOpenGLWidget to display/manipulate the 
images so that we get an accelerated canvas to use. That looked 
promising in combination with traditional QWidgets.


I would like to hear other peoples experiences & suggestions as to what 
they are doing. I don't want to write the app and then have to figure 
out how to port it to another Qt technology in a year or so after our 
funding has run out.


Thanks for any/all comments.

[1] 
https://cdn2.hubspot.net/hubfs/149513/QtWS16%20Webinars/The%20Curse%20of%20Choice-%20An%20overview%20of%20GUI%20technologies%20in%20Qt.mp4?utm_campaign=QtWS16+Webinars_source=hs_automation_medium=email_content=38349957&_hsenc=p2ANqtz-_OQYaCO6wb88VHD74o0lNXfMmleVTmkD0xK0R42_e8YaWPrimIoWHLQlM0VzYmf-U_A4EAMiWaVH9__M0EMX190Ih57w&_hsmi=38349957



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[Interest] VS 2017 Precompiled Binaries

[Mike Jackson]

Is there a road map for when Qt 5.6.x precompiled binaries would be 
available for VS2017 after it is release? Are we looking at next spring, 
summer or not until 2018?


We are just trying to gauge our plans to move forward from VS2013 
tooling and what that time frame might be.


Thank You.
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Re: [Interest] Faster Qt app build

[Mike Jackson]

You are comparing a Quad Core i5 to a Dual Core i5. So the Quad should 
be faster than the dual core. If you really want to compare them a bit 
better, on the Quad core tell JOM to only use 2 threads, and on the Dual 
core, if you are using "make" as your build system, ensure you are 
sending the -j2 or -j argument to make otherwise make will only build 
using a single process/cpu/core.


The SSD comparison is probably a wash. You do not state what year the 
MacBook Pro is so I don't know if the SSD is SATA or PCIe based. Either 
way the MacBook Pro SSD should be as fast as the 840 EVO drive.



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Nuno Santos wrote:

For Mac/iOS applications Qt uses clang (sorry for the misunderstanding)
For Android build Qt uses GCC

My main dev machine is a Macbook 13 Retina i5 2.5 dual core with a stock SSD 
drive
The Windows machine I refer has a i5 2.5 quad-core with a Samsung 840 PRO SSD 
drive

I bought the 840 PRO because it is known for it’s incredible performance.

Compiling the exact same program on the windows machine is at least twice fast 
as on the mac machine. MSVC vs CLANG.

Do you guys think this is only due to the drive? Isn’t it taking advantage of 
the extra cores on Windows? Also, on mac, it doesn’t seem to be taking 
advantage of the multiple cores.

Question: passing -jX argument does anything or not?

Regards

Nuno


On 21 Oct 2016, at 19:06, Mike Jackson<imikejack...@gmail.com>  wrote:

Hmm,
  That does not seem correct? I have never seen a Windows build of anything go 
faster on Windows than on Linux or macOS give those are running on the exact 
same hardware.

And when you state "GCC" builds are you using GCC from MacPorts, Homebrew or 
somewhere else? because Apple has not shipped GCC (at least a recent version) in a long 
time.

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Nuno Santos wrote:

Hi,

On Windows, building a Qt app is blazing fast. It seems that jom takes the cpu 
cores to it’s maximum power.

On Mac the GCC builds are really slow and passing the -jX argument doesn’t seem 
to make any difference. Is there a way to speed up builds? My projects have a 
lot of files now and compiling a build can take around 5 minutes on a i5 2.5 
dual core CPU.

Any tips?

Thanks!

Regards,

Nuno Santos
Founder / CEO / CTO
www.imaginando.pt
+351 91 621 69 62

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Re: [Interest] Faster Qt app build

[Mike Jackson]

Hmm,
  That does not seem correct? I have never seen a Windows build of 
anything go faster on Windows than on Linux or macOS give those are 
running on the exact same hardware.


And when you state "GCC" builds are you using GCC from MacPorts, 
Homebrew or somewhere else? because Apple has not shipped GCC (at least 
a recent version) in a long time.


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Nuno Santos wrote:

Hi,

On Windows, building a Qt app is blazing fast. It seems that jom takes the cpu 
cores to it’s maximum power.

On Mac the GCC builds are really slow and passing the -jX argument doesn’t seem 
to make any difference. Is there a way to speed up builds? My projects have a 
lot of files now and compiling a build can take around 5 minutes on a i5 2.5 
dual core CPU.

Any tips?

Thanks!

Regards,

Nuno Santos
Founder / CEO / CTO
www.imaginando.pt
+351 91 621 69 62

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Re: [Interest] Memory Leak when instantiating QWidget based windows

[Mike Jackson]

Does QtCreator come with suppression files for Qt5? I ran valgrind "by 
hand" on the command line and while I was able to actually find some of 
our leaks (yeah Valgrind..) I had to wade through 20,000 Qt leaks to 
find my leaks. Would be nice to filter those out somehow.



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Andy wrote:

I too am using valgrind-3.11.0 (on Mac OS X 10.10.5), but I've never
seen that in the Application Output window.  I don't usually look there
when using Memcheck.

Is there anything at all in the Memcheck panel?  Sometimes if your
application crashes when using valgrind there is useful info there.

Are you running on the debug or release version of your application?

Or could it be related this?:
https://bugreports.qt.io/browse/QTCREATORBUG-10163



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On Thu, Sep 8, 2016 at 9:37 AM, Edward Sutton <edward.sut...@subsite.com
<mailto:edward.sut...@subsite.com>> wrote:



On Sep 8, 2016, at 8:18 AM, Andy <asmalo...@gmail.com
<mailto:asmalo...@gmail.com>> wrote:

Ah - sorry.  I can see how that's unclear (pre-coffee email).

I meant the Debug section on the left-hand side of the main
window: Welcome, Edit, Design, Debug,...

>0Then the bottom pane pops up below the editor and has a dropdown
at the top-left - Debugger, Clang Static Analyzer, Memcheck,…


Found it! Thank you.

3.1 - Selected Memcheck in the drop-down at lower-left main edit window
3.2 - Press green play button to the *right* of the Memcheck drop-down

Unfortunately it did not run for me.

Application Output reported:

Analyzing finished.
** Unknown error **

Using valgrind-3.11.0

-Ed




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On Thu, Sep 8, 2016 at 9:13 AM, Edward Sutton
<edward.sut...@subsite.com <mailto:edward.sut...@subsite.com>> wrote:

Hi Andy,

Could you please elaborate on step #3?

I cannot find a Memcheck option under Preferences > Debugger.

Thanks for the tips!

-Ed
Qt Creator 4.01 with Qt 5.6.1



On Sep 8, 2016, at 7:56 AM, Andy <asmalo...@gmail.com
<mailto:asmalo...@gmail.com>> wrote:

Mike:

If you haven't already tried it, using Qt Creator in
combination with valgrind works really well to track these
kinds of things down.

The basics:

  1) install valgrind (I used homebrew)
  2) point Qt Creator at it in the prefs (Analyzer->Valgrind)
  3) Click the Debug tab, set the tool to Memcheck, and click
the start button (little green arrow)

After it runs your application (slowly), it will spit out a
bunch of info about memory leaks that make it pretty easy to
track down the problems.




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On Thu, Sep 8, 2016 at 6:55 AM, Konstantin Shegunov
<kshegu...@gmail.com <mailto:kshegu...@gmail.com>> wrote:


On Wed, Sep 7, 2016 at 11:23 PM, Mike Jackson
<imikejack...@gmail.com <mailto:imikejack...@gmail.com>>
wrote:

We monitor the memory use before and after the loop
using OS X's Activity monitor. At the end of the loop
there is more memory being used than before the loop,
by about 2~3MB worth.


This isn't reliable. Consider the following C++ only code:

intmain(intargc,char**argv)

{

 struct  X;

 X  *  x  =  nullptr;


 struct  X  {

 int  data[1024];

 };


 for  (qint32  i  =  0;  i  <  10;  i++)   

[Interest] Memory Leak when instantiating QWidget based windows

[Mike Jackson]

We are attempting to track down a memory leak that we _think_ we have. 
We have reduced our code to the point where all we do is invoke a new 
QWidget instance, show() it, hide() it and then delete it. We do this in 
a loop 100 times. We monitor the memory use before and after the loop 
using OS X's Activity monitor. At the end of the loop there is more 
memory being used than before the loop, by about 2~3MB worth.


My question is: Is this normal for a Qt Application to retain some 
memory for each QWidget through global variables and such? Is it 
something in OS X 10.10?


Thanks to anyone who can shed a little light on this for us. Oh. This is 
with Qt 5.6.1-1 on OS X 10.10.5. We also notice this on Windows 10 with 
the same version of Qt.


Thanks

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Re: [Interest] Build Qt for command line only

[Mike Jackson]

Thiago Macieira wrote:

On quinta-feira, 4 de agosto de 2016 00:41:59 PDT Scott Aron Bloom wrote:

Im playing with the new Bash/WSL for windows 10, and want to create a Qt
package.

There is no X available, its only CLI based, what configuration options are
the best for this setup?


The XCB plugin is optional. Just don't build it. You'll still have offscreen.

Or if you really want no GUI, configure -no-gui.

Actually there is a blog post and code (on git hub) of someone running 
the full Unity desktop under the "Linux on Windows" thing. 
http://www.omgubuntu.co.uk/2016/07/someone-just-installed-unity-windows


so maybe you _could_ do the whole Qt package?

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Re: [Interest] Qt LGPLv3 and Qt LGPL Exception

[Mike Jackson]

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Konstantin Tokarev wrote:


28.06.2016, 21:53, "André Somers":

Op 28/06/2016 om 11:09 schreef Jean-Michaël Celerier:

On Tue, Jun 28, 2016 at 10:39 AM, Benjamin TERRIER  wrote:

The technical reason is that when including Qt headers in proprietary
software, your final binary contains compiled forms of Qt code (e.g
inline function or template classes).

 From the LGPLv3 :

3. Object Code Incorporating Material from Library Header Files.

The object code form of an Application may incorporate material from a header 
file that is part of the Library. You may convey such object code under terms 
of your choice, provided that, if the incorporated material is not limited to 
numerical parameters, data structure layouts and accessors, or small macros, 
inline functions and templates (ten or fewer lines in length), you do both of 
the following:

So... How exactly do you use any of the Qt containers using the LGPL3 
libraries? Are they implemented in 10 or less lines of template code?


Accordingly to following points (a) and (b), similarly to LGPL 2 terms.


So is there some sort of test or sanity checking "bot" that guarantees 
that those functions are 10 lines or less? I am staking my project on 
that fact and I would want some sort of absolute guarantee that those 
functions are indeed 10 lines or less.





It think the question is valid, and reading the question, you can see that he 
read that passage.

André


* a) Give prominent notice with each copy of the object code that the Library 
is used in it and that the Library and its use are covered by this License.
* b) Accompany the object code with a copy of the GNU GPL and this license 
document.

Best
Jean-Michaël Celerier

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[Interest] Deploying QtWebEngine on Linux with Qt 5.6.0

[Mike Jackson]

I am running Ubuntu 14.04 and Qt 5.6 downloaded from downloads.qt.io. I
have built my application
and the application runs but when I try to invoke the QWebEngine classes I
just get an empty widget and the following error in the terminal:

/opt/DREAM3D_SDK/Qt5.6.0/5.6/gcc_64/libexec/QtWebEngineProcess: error while
loading shared libraries: libQt5WebEngineCore.so.5: cannot open shared
object file: No such file or directory

The same thing happens when I package my application. I have tried all
sorts of ways of configuring the qt.conf directory, moving libs into other
folders, renaming executables but nothing seems to work. Has anyone else
run into a situation like this? Can anyone make recommendations on how to
package QWebEngine?

I have copied over all the resources and translations so that is not the
issue.

Thanks.
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Re: [Interest] QUndoStack

[Mike Jackson]

Yes, we have already executed what constitutes the command by the time 
we push it onto the stack. Maybe we are not using QUndoStack correctly 
then? we should be creating the command that _should_ get executed, 
place it on the stack, which will then execute the command.


Still seems odd but we can look at doing that.
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Elvis Stansvik wrote:

2016-06-17 18:18 GMT+02:00 Mike Jackson<imikejack...@gmail.com>:

We are using the QUndoStack and when we "push()" onto the stack the actual
QUndoCommand is being executed. In the documentation is seems as though I
could set the "id" of the QUndoCommand to -1 and NOT have it executed but
after looking more close at the docs and the actual source code the
QUndoCommand will definitely be executed when pushed onto the stack. This
behavior does not make sense to me and I am probably missing something
simple about how to use the QUndoStack. Could someone offer an explanation
of why my command gets executed? And also how do I get my undocommand on the
stack **without** executing the command?


I haven't used QUndoStack much myself, but to me what you describe
does not make sense. An undo stack is supposed to represent what has
happened (this history), so why should a command not be executed when
pushed? Is it that you have already executed it manually?

Either way, I think a command will always be executed when pushed, so
that's what you need to work with. The -1 id thing seems to be just
for controlling the merging behavior.

Elvis


Thanks

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[Interest] QUndoStack

[Mike Jackson]

We are using the QUndoStack and when we "push()" onto the stack the 
actual QUndoCommand is being executed. In the documentation is seems as 
though I could set the "id" of the QUndoCommand to -1 and NOT have it 
executed but after looking more close at the docs and the actual source 
code the QUndoCommand will definitely be executed when pushed onto the 
stack. This behavior does not make sense to me and I am probably missing 
something simple about how to use the QUndoStack. Could someone offer an 
explanation of why my command gets executed? And also how do I get my 
undocommand on the stack **without** executing the command?


Thanks

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[Interest] QSplitterHandle is Rainbow Colored

[Mike Jackson]

We are having an issue where any QSplitter we insert into our program, 
the QSplitterHandle has a rainbow color gradient across the handle. It 
is clearly not a bug in Qt 5.6.0 because the example programs that we 
build from the 5.6.0 distribution are all correct. The only thing I can 
think of is we are accidentally setting a CSS value on either 
QSplitterHandle, or QWidget or something like that. I am looking for 
advice on where to start looking in our code? What types of things can 
effect the look of the QSplitterHandle.


Thanks
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[Interest] Qt 5.6.0 Offline Installer in "Headless" or "Automated" mode

[Mike Jackson]

Is there a way to launch the Qt 5.6.0 offline installer in such a way so
that the gui either does not launch or all the options that I need are
selected/deselected/Filled in and the installer automatically installs
Qt where I want it installed?

Our own SDK depends on Qt and I would love to be able to just have our
developers use a single installer instead of installing our SDK, then
using the Qt offline installer after that.

Thanks
Mike Jackson

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[Interest] Displaying Help from QHelpEngine through QWebEngine

[Mike Jackson]

I am attempting to use the QHelp* classes to allow our users to search 
our help files (html based) using the same mechanisms as those used with 
QAssistant. So far I have hacked together the major pieces and hooked 
everything up. I am able to manually generate a .qhc file from all of 
our html and image sources. I got so far as to enter a search string and 
have the relevant documents appear in the results widget. Now when I 
click on a link I would like to actually display the help. Currently we 
use QWebEngineView on Qt 5.5.1 because QWebKit was being deprecated. I 
am pretty sure the issue as to why nothing is displayed is because I get 
a URL like the following:



"qthelp://bluequartzsoftware.net.dream3d.1.0/DREAM3D/addorientationnoise.html"


and QWebEngine probably has no idea what to do with that URL scheme. I 
have looked around the internet using Google and while other people are 
asking this same question there are no actual answers. About the only 
possibility seems to get the file contents from the HelpEngine along 
with any CSS and Image assets, write all of those to a temp location on 
the filesystem, then load the URL from the temp location? There must be 
an easier way that I am just missing.



Any help is greatly appreciated.


--
Mike Jackson   BlueQuartz Software

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Re: [Interest] Displaying Help from QHelpEngine through QWebEngine

[Mike Jackson]

I went looking through the QAssistant sources but could not really 
follow what was going on. The best that I could tell is maybe there is a 
custom Network handler that qthelp:// uses. Kind of like a super 
lightweight "server" that QWebKit talks to when requesting URLs that are 
stored in the .qhc file?


We were going to eventually move to Qt 5.6 when it is officially 
released. Just seems odd that Qt has you package up your files into a 
SQLite data base but then offers no convenient way of actually 
displaying that content to the user. Odd. For now what I think we are 
going to do is to ship both the loose html files and the .qhc file. We 
can use the .qhc for full text searching but use the loose .html files 
for display. Seems to work, just did not really want to ship 2x sets of 
the docs.


Thanks for the heads up about Qt 5.6

Mike Jackson



Allan Sandfeld Jensen <mailto:k...@carewolf.com>
February 9, 2016 at 7:00 PMvia Postbox 
<https://www.postbox-inc.com/?utm_source=email_medium=sumlink_campaign=reach>


What you need is the QWebEngineUrlSchemeHandler which was added in Qt 
5.6. It

adds the ability to add custom URL schemes to QtWebEngine.

Best regards
`Allan Jensen
Mike Jackson <mailto:imikejack...@gmail.com>
February 9, 2016 at 5:28 PMvia Postbox 
<https://www.postbox-inc.com/?utm_source=email_medium=sumlink_campaign=reach>
I am attempting to use the QHelp* classes to allow our users to search 
our help files (html based) using the same mechanisms as those used 
with QAssistant. So far I have hacked together the major pieces and 
hooked everything up. I am able to manually generate a .qhc file from 
all of our html and image sources. I got so far as to enter a search 
string and have the relevant documents appear in the results widget. 
Now when I click on a link I would like to actually display the help. 
Currently we use QWebEngineView on Qt 5.5.1 because QWebKit was being 
deprecated. I am pretty sure the issue as to why nothing is displayed 
is because I get a URL like the following:



"qthelp://bluequartzsoftware.net.dream3d.1.0/DREAM3D/addorientationnoise.html"


and QWebEngine probably has no idea what to do with that URL scheme. I 
have looked around the internet using Google and while other people 
are asking this same question there are no actual answers. About the 
only possibility seems to get the file contents from the HelpEngine 
along with any CSS and Image assets, write all of those to a temp 
location on the filesystem, then load the URL from the temp location? 
There must be an easier way that I am just missing.



Any help is greatly appreciated.




--
Michael A. Jackson 400 S. Pioneer Blvd
Owner, President   Springboro, Ohio 45066
BlueQuartz Software, LLC   EMail: mike.jack...@bluequartz.net
Voice: 937-806-1165Web: http://www.bluequartz.net
Fax: 
937-746-0783<https://www.postbox-inc.com/?utm_source=email_medium=siglink_campaign=reach>
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Re: [Interest] Qt 5.6.0 beta / Mac / lldb / Debug Symbols

[Mike Jackson]

> On Jan 20, 2016, at 4:26 PM, Thiago Macieira <thiago.macie...@intel.com> 
> wrote:
> 
> On Wednesday 20 January 2016 09:50:51 Nils Jeisecke via Interest wrote:
>> On Tue, Jan 19, 2016 at 5:29 PM, Thiago Macieira
>> 
>> <thiago.macie...@intel.com> wrote:
>>> Yes. Debug symbols in the pre-compiled builds do not work.
>> 
>> Is this a known issue or shall I create a bug report?
> 
> It's a known and, AFAIU, unfixable issue. That's just how the debug format 
> stores the information.
> 
> I think it should show line numbers, but it can't find the source code 
> because 
> you don't have the source code at the same place as the debugging information 
> expects it to be.
> -- 
> Thiago Macieira - thiago.macieira (AT) intel.com
>  Software Architect - Intel Open Source Technology Center

Not that I have tried this BUT in theory if you knew the exact paths that Digia 
used to build the Qt distribution and set up your sources in the same paths 
then the debug symbols might start working. At least that is the first thing I 
would try.

—
Mike Jackson
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[Interest] Qt 5.5.1 qmath.h redefines math.h macros with VS2013

[Mike Jackson]

We just switched up to Qt 5.5.1 for our project and now we are getting the 
following warnings through out our code base:


C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(1303) : 
warning C4005: 'M_2_SQRTPI' : macro redefinition
C:\DREAM3D_SDK\Qt5.5.1\5.5\msvc2013_64\include\QtCore\qmath.h(176) : see 
previous definition of ‘M_2_SQRTPI'

Has anyone ever seen this and if so, what is the correct solution?

Thanks
Mike Jackson

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Re: [Interest] QWebEngineView not loading pages from history

[Mike Jackson]

Ping? 

Mike Jackson.

> On Dec 18, 2015, at 2:54 PM, Mike Jackson <imikejack...@gmail.com> wrote:
> 
> We have tried a bunch more ideas and none seem to work. We have tried the 
> following:
> m_WebView->page()->triggerAction(QWebEnginePage::Back);
> m_WebView->page()->history()->goToItem( 
> m_WebView->page()->history()->itemAt(1));
> m_WebView->page()->triggerAction(QWebEnginePage::Back);
> 
> 
> None of these work. The documentation for QWebEngineView _says_ it should 
> work. Does anyone have any ideas?
> 
> Thanks
> Mike Jackson
> 
>> On Dec 16, 2015, at 3:13 PM, Mike Jackson <imikejack...@gmail.com 
>> <mailto:imikejack...@gmail.com>> wrote:
>> 
>> I have an small app that uses QWebEngineView to display web pages. We have 
>> tried hooking up a pair of QPushButtons to invoke the forward and back in 
>> the QWebEngineHistory but neither seem to work. The QActions are getting 
>> triggered and our code is correctly calling them but the QWebEngineView does 
>> not actually load the previous page from its history. We have printed out 
>> the history each time the button is clicked and the history is correctly 
>> navigated. I am sure we have missed something simple that needs to be 
>> performed. Maybe some sort of setup of the QWebEngineView or something? I am 
>> pasting in our simple application hoping that someone can spot the error.
>> Thanks
>> Mike Jackson
>> 
>> ———main.cpp—
>> #include 
>> #include "WebTest_UI.h"
>> int main(int argc, char* argv[])
>> {
>> 
>>  QApplication app(argc, argv);
>> 
>>  QCoreApplication::setOrganizationDomain("Foo");
>>  QCoreApplication::setOrganizationName("Bar");
>>  QCoreApplication::setApplicationName("WebTest_UI");
>> 
>> #if defined (Q_OS_MAC)
>>  app.setQuitOnLastWindowClosed( true );
>> #endif
>> 
>>  QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
>> 
>>  WebTest_UI* helper = WebTest_UI::Instance();
>>  helper->show();
>> 
>>  return app.exec();
>> }
>> 
>> ——WebTest_UI.h—
>> #ifndef _WebTest_UI_H_
>> #define _WebTest_UI_H_
>> #include 
>> #include 
>> #include 
>> class  WebTest_UI : public QWidget
>> {
>>Q_OBJECT
>>  public:
>>virtual ~WebTest_UI();
>>static WebTest_UI* Instance();
>>  protected:
>>WebTest_UI();
>>  protected slots:
>>void goBack(bool b);
>>  private:
>>static WebTest_UI* self;
>>QWebEngineView* m_WebView;
>>QPushButton* forwardBtn;
>>QPushButton* backBtn;
>>WebTest_UI(const WebTest_UI&); // Copy Constructor Not Implemented
>>void operator=(const WebTest_UI&); // Operator '=' Not Implemented
>> };
>> #endif /* _WebTest_UI_H */
>> 
>> ——WebTest_UI.cpp—
>> #include "WebTest_UI.h"
>> #include 
>> #include 
>> #include 
>> #include 
>> #include 
>> #include 
>> // Include the MOC generated CPP file which has all the QMetaObject 
>> methods/data
>> #include "moc_WebTest_UI.cpp"
>> 
>> WebTest_UI* WebTest_UI::self = NULL;
>> // 
>> -
>> WebTest_UI::WebTest_UI()
>> {
>>  Q_ASSERT_X(!self, "WebTest_UI", "There should be only one WebTest_UI 
>> object");
>> 
>>  WebTest_UI::self = this;
>> 
>>  // Create the web view
>>  m_WebView = new QWebEngineView(NULL);
>>  m_WebView->setObjectName(QStringLiteral("m_WebView"));
>>  QSizePolicy sizePolicy1(QSizePolicy::Expanding, QSizePolicy::Expanding);
>>  sizePolicy1.setHorizontalStretch(0);
>>  sizePolicy1.setVerticalStretch(0);
>>  sizePolicy1.setHeightForWidth(m_WebView->sizePolicy().hasHeightForWidth());
>>  m_WebView->setSizePolicy(sizePolicy1);
>>  m_WebView->setUrl(QUrl(QStringLiteral("about:blank")));
>>  QGridLayout* gridLayout = new QGridLayout(this);
>>  gridLayout->addWidget(m_WebView, 2, 0, 1, 2);
>>  m_WebView->load(QUrl("http://download.qt.io <http://download.qt.io/>"));
>>  m_WebView->show();
>> 
>>  backBtn = new QPushButton("Back");
>>  gridLayout->addWidget(backBtn, 1, 0, 1, 1);
>>  connect(backBtn, SIGNAL(clicked(bool)),
>>  this, SLOT(goBack(bool)));
>> 
>>  forwardBtn = new QPushButton("Forward");
>>  gridLayout->addWidget(forwa

Re: [Interest] QWebEngineView not loading pages from history

[Mike Jackson]

We have tried a bunch more ideas and none seem to work. We have tried the 
following:
m_WebView->page()->triggerAction(QWebEnginePage::Back);
m_WebView->page()->history()->goToItem( 
m_WebView->page()->history()->itemAt(1));
m_WebView->page()->triggerAction(QWebEnginePage::Back);


None of these work. The documentation for QWebEngineView _says_ it should work. 
Does anyone have any ideas?

Thanks
Mike Jackson

> On Dec 16, 2015, at 3:13 PM, Mike Jackson <imikejack...@gmail.com> wrote:
> 
> I have an small app that uses QWebEngineView to display web pages. We have 
> tried hooking up a pair of QPushButtons to invoke the forward and back in the 
> QWebEngineHistory but neither seem to work. The QActions are getting 
> triggered and our code is correctly calling them but the QWebEngineView does 
> not actually load the previous page from its history. We have printed out the 
> history each time the button is clicked and the history is correctly 
> navigated. I am sure we have missed something simple that needs to be 
> performed. Maybe some sort of setup of the QWebEngineView or something? I am 
> pasting in our simple application hoping that someone can spot the error.
> Thanks
> Mike Jackson
> 
> ———main.cpp—
> #include 
> #include "WebTest_UI.h"
> int main(int argc, char* argv[])
> {
> 
>  QApplication app(argc, argv);
> 
>  QCoreApplication::setOrganizationDomain("Foo");
>  QCoreApplication::setOrganizationName("Bar");
>  QCoreApplication::setApplicationName("WebTest_UI");
> 
> #if defined (Q_OS_MAC)
>  app.setQuitOnLastWindowClosed( true );
> #endif
> 
>  QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
> 
>  WebTest_UI* helper = WebTest_UI::Instance();
>  helper->show();
> 
>  return app.exec();
> }
> 
> ——WebTest_UI.h—
> #ifndef _WebTest_UI_H_
> #define _WebTest_UI_H_
> #include 
> #include 
> #include 
> class  WebTest_UI : public QWidget
> {
>Q_OBJECT
>  public:
>virtual ~WebTest_UI();
>static WebTest_UI* Instance();
>  protected:
>WebTest_UI();
>  protected slots:
>void goBack(bool b);
>  private:
>static WebTest_UI* self;
>QWebEngineView* m_WebView;
>QPushButton* forwardBtn;
>QPushButton* backBtn;
>WebTest_UI(const WebTest_UI&); // Copy Constructor Not Implemented
>void operator=(const WebTest_UI&); // Operator '=' Not Implemented
> };
> #endif /* _WebTest_UI_H */
> 
> ——WebTest_UI.cpp—
> #include "WebTest_UI.h"
> #include 
> #include 
> #include 
> #include 
> #include 
> #include 
> // Include the MOC generated CPP file which has all the QMetaObject 
> methods/data
> #include "moc_WebTest_UI.cpp"
> 
> WebTest_UI* WebTest_UI::self = NULL;
> // 
> -
> WebTest_UI::WebTest_UI()
> {
>  Q_ASSERT_X(!self, "WebTest_UI", "There should be only one WebTest_UI 
> object");
> 
>  WebTest_UI::self = this;
> 
>  // Create the web view
>  m_WebView = new QWebEngineView(NULL);
>  m_WebView->setObjectName(QStringLiteral("m_WebView"));
>  QSizePolicy sizePolicy1(QSizePolicy::Expanding, QSizePolicy::Expanding);
>  sizePolicy1.setHorizontalStretch(0);
>  sizePolicy1.setVerticalStretch(0);
>  sizePolicy1.setHeightForWidth(m_WebView->sizePolicy().hasHeightForWidth());
>  m_WebView->setSizePolicy(sizePolicy1);
>  m_WebView->setUrl(QUrl(QStringLiteral("about:blank")));
>  QGridLayout* gridLayout = new QGridLayout(this);
>  gridLayout->addWidget(m_WebView, 2, 0, 1, 2);
>  m_WebView->load(QUrl("http://download.qt.io;));
>  m_WebView->show();
> 
>  backBtn = new QPushButton("Back");
>  gridLayout->addWidget(backBtn, 1, 0, 1, 1);
>  connect(backBtn, SIGNAL(clicked(bool)),
>  this, SLOT(goBack(bool)));
> 
>  forwardBtn = new QPushButton("Forward");
>  gridLayout->addWidget(forwardBtn, 1,1,1,1);
> 
>  self->setWindowFlags(this->windowFlags() & ~Qt::WindowContextHelpButtonHint);
> 
> #if defined (Q_OS_MAC)
>  QAction* closeAction = new QAction(this);
>  closeAction->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_W));
>  connect(closeAction, SIGNAL(triggered()), this, SLOT(close()));
>  addAction(closeAction);
> #endif
> }
> // 
> -
> WebTest_UI::~WebTest_UI() {}
> // 
> -
> WebTest_UI* WebTest_UI::Instance()
> {
>  if (self == NULL)
>  {
>self 

Re: [Interest] QML and ScrollView

[Mike Jackson]

Thanks for the tips. I have tried all of them and nothing is working. I will 
try to explain what I want and maybe someone can tell me what I am doing wrong. 

I  want a scrollable grid layout. In the grid layout are pairs of “Label” and 
“Text Field” not unlike the Form Layout for a normal desktop app. I want the 
“TextField” to extend itself to the width of the GridLayout. And I want the 
grid layout to extend itself to the width of the ScrollView. The ScrollView 
should extend itself to the width of the QQuickWidget that i am using.

My first foray into QML isn’t going so well.

—
Mike Jackson
> On Dec 3, 2015, at 11:45 PM, Jason H <jh...@gmx.com> wrote:
> 
> There are two sizes with the Scrolly things.
> The scroll  item, whose extents are set via anchors or height/width,and the 
> contentHeight and contentWidth, which are the virtual area, in this case your 
> grid layout.
> Give your Grid an id, and set the scrollview contentWidth/contentHeight to 
> the width and height of the
> Also, usually you need a height AND width set, if the anchors are not set.
>  
> Sent: Thursday, December 03, 2015 at 7:07 PM
> From: "Mike Jackson" <imikejack...@gmail.com>
> To: "Qt Project" <interest@qt-project.org>
> Subject: [Interest] QML and ScrollView
> I am trying to use a ScrollView in a QQuickWidget but the layout does not 
> seem to be honoring what I am wanting. I have a bunch of “Label/TextField” 
> pairs to the point where there are so many that I need them inside a 
> scrollview. the issue is that if I do that then the TextFields which are set 
> to fill in the rest of the row (inside a GridLayout) does not fill the row. 
> If I remove the ScrollView then the TextField fills the remainder of the row?
>Since this is my first foray into QML I am sure I am missing something 
> obvious. this is with Qt 5.5.1 on OS X. I’ll post my 
> —
> Mike Jackson [imikejack...@gmail.com ]
>  
>  import QtQuick 2.4
> import QtQuick.Controls 1.4
> import QtQuick.Layouts 1.1
> import LeroyJsonStorage 1.0
> 
> Rectangle {
> 
> // Make the background a bit darker
> color: "Light Gray"
> border.color: "Black"
> 
> ScrollView
> {
> anchors.fill: parent
> height: 800
> 
> GridLayout {
> columns: 2
> anchors.fill: parent
> Label {
> text: "Foo"
> Layout.row: 0
> }
> TextField {
> text: "Bar"
> Layout.row: 0
> Layout.column: 1
> Layout.fillWidth: true
> }
> 
> Label {
> text: "Foo"
> Layout.row: 1
> }
> TextField {
> text: "Bar"
> Layout.row: 1
> }
> 
> Label {
> text: "Foo"
> Layout.row: 2
> }
> TextField {
> text: "Bar"
> Layout.row: 2
> }
> 
> Label {
> text: "Foo"
> Layout.row: 3
> }
> TextField {
> text: "Bar"
> Layout.row: 3
> }
> 
> Label {
> text: "Foo"
> Layout.row: 4
> }
> TextField {
> text: "Bar"
> Layout.row: 4
> }
> 
> Label {
> text: "Foo"
> Layout.row: 5
> }
> TextField {
> text: "Bar"
> Layout.row: 5
> }
> 
> Label {
> text: "Foo"
> Layout.row: 6
> }
> TextField {
> text: "Bar"
> Layout.row: 6
> }
> 
> Label {
> text: "Foo"
> Layout.row: 7
> }
> TextField {
> text: "Bar"
> Layout.row: 7
> }
> 
> 
> }
> }
> }
>  
> 
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> <http://lists.qt-project.org/mailman/listinfo/interest>
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[Interest] QML undefined Reference if object is in a TabView

[Mike Jackson]

I am working on a QML application and after the last issues were solved I am 
attempting to refactor the code so that common sets of QML codes are in their 
own .qml files. 

The issue that I am having is that now that I am using TabView{} and associated 
“Tab” widgets, when I go to reference a TextField that is buried down in one of 
the tabs I get the “ReferenceError: minZThickness_TF is not defined” error. If 
I move that QML object as a child of the root QML object then things work, but 
obviously the display is now busted. Has anyone else seen anything like this 
before? I’ll attach my QML file to the end for the curious.
—
Mike Jackson


import QtQuick 2.4
import QtQuick.Controls 1.4
import QtQuick.Layouts 1.2

Rectangle
{
id: rectangle
width: 800
// Make the background a bit lighter
color: "Light Gray"
border.color: "Black"
objectName: "RootObject"

//---
// These Variables are related to the Small IN100 Campaign.
// ---
Item {
id: experimentParams
property real minZThickness: 4.0
property int targetGrainCount: 0

function toJSON() {
experimentParams.minZThickness = parseFloat(minZThickness_TF.text)
experimentParams.targetGrainCount = 
parseInt(targetGrainCount_TF.text)
return '"Small IN100" : {' +
'"minZThickness": ' + experimentParams.minZThickness + ',' +
'"targetGrainCount": ' + experimentParams.targetGrainCount +
'}';
}
}

TabView {
id: tabView_
anchors.right: parent.right
anchors.bottom: parent.bottom
anchors.top: parent.top
anchors.left: parent.left
antialiasing: true


Tab {
id: experimentTab
title: "Grain Count Parameters"
anchors.topMargin: 12
ScrollView
{
id: scrollView_
anchors.top: parent.top
anchors.left: parent.left
anchors.right: parent.right
anchors.bottom: parent.bottom


GridLayout
{
id:gridLayout0_
columns: 2
columnSpacing: 5
rowSpacing: 10
property int scrollBarSpacing: 20
width: scrollView_.width - scrollBarSpacing
flow: GridLayout.LeftToRight

Text { text: qsTr("Target Grain Count:") }
TextField
{
id: targetGrainCount_TF
Layout.fillWidth: true
text: experimentParams.targetGrainCount
onEditingFinished: experimentParams.targetGrainCount = 
targetGrainCount_TF.text
}
Text { text: qsTr("Min. Z Thickness:") }
TextField
{
id: minZThickness_TF
Layout.fillWidth: true
text: experimentParams.minZThickness
onEditingFinished: experimentParams.minZThickness = 
minZThickness_TF.text
}
}
}

}

}


// This function creates the JSON that will be transmitted through out the 
network
// to gather data from the instruments and pass that data to the Analysis 
Engine
// It should include all the elements from the "Item" above.
function makeJson()
{
return experimentParams.toJSON();
}


}

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Re: [Interest] QML and ScrollView

[Mike Jackson]

THANK YOU!!!. With a few tweaks this works exactly as I wanted. I will study 
the code to fully understand what is going on. Thanks to everyone who gave me 
hints and possible solutions.

—
Mike Jackson

> On Dec 4, 2015, at 12:41 PM, Jérôme Godbout <jer...@bodycad.com> wrote:
> 
> What you may want to try is something similar to this, note the parent of 
> GridLayout is a flickarable item and not the scrollview, this flickerable 
> does'nt have any size it take the children size, so you need to bind to 
> scrollview sizing to resize the width properly:
> 
> Item
> {
>   id: component
>   width: 800
>   height: 600
>   
>   ScrollView
>   {
>   id: scrollView_
>   anchors.top: parent.top
>   anchors.left: parent.left
>   anchors.right: parent.right
>   height: 200
> 
>   GridLayout
>   {
>   columns: 2
>   columnSpacing: 5
>   rowSpacing: 10
>   property int scrollBarSpacing: 20
>   width: scrollView_.width - scrollBarSpacing
>   flow: GridLayout.LeftToRight
> 
>   Text { text: qsTr("Repos path: ") }
>   TextField
>   {
>   Layout.fillWidth: true
>   text: 'fill me...'
>   }
>   Text { text: qsTr("Repos path: ") }
>   TextField
>   {
>   Layout.fillWidth: true
>   text: 'fill me...'
>   }
>   Text { text: qsTr("Repos path: ") }
>   TextField
>   {
>   Layout.fillWidth: true
>   text: 'fill me...'
>   }
>   Text { text: qsTr("Repos path: ") }
>   TextField
>   {
>   Layout.fillWidth: true
>   text: 'fill me...'
>   }
>   Text { text: qsTr("Repos path: ") }
>   TextField
>   {
>   Layout.fillWidth: true
>   text: 'fill me...'
>   }
>   Text { text: qsTr("Repos path: ") }
>   TextField
>   {
>   Layout.fillWidth: true
>   text: 'fill me...'
>   }
>   Text { text: qsTr("Repos path: ") }
>   TextField
>   {
>   Layout.fillWidth: true
>   text: 'fill me...'
>   }
>   Text { text: qsTr("Repos path: ") }
>   TextField
>   {
>   Layout.fillWidth: true
>   text: 'fill me...'
>   }
>   }
>   }
> }
> 
> 
> Hope this help understand what is going on for you ;-)
> 
> On Fri, Dec 4, 2015 at 11:24 AM, Mike Jackson <imikejack...@gmail.com 
> <mailto:imikejack...@gmail.com>> wrote:
> Thanks for the tips. I have tried all of them and nothing is working. I will 
> try to explain what I want and maybe someone can tell me what I am doing 
> wrong. 
> 
> I  want a scrollable grid layout. In the grid layout are pairs of “Label” and 
> “Text Field” not unlike the Form Layout for a normal desktop app. I want the 
> “TextField” to extend itself to the width of the GridLayout. And I want the 
> grid layout to extend itself to the width of the ScrollView. The ScrollView 
> should extend itself to the width of the QQuickWidget that i am using.
> 
> My first foray into QML isn’t going so well.
> 
> —
> Mike Jackson
>> On Dec 3, 2015, at 11:45 PM, Jason H <jh...@gmx.com <mailto:jh...@gmx.com>> 
>> wrote:
>> 
>> There are two sizes with the Scrolly things.
>> The scroll  item, whose extents are set via anchors or height/width,and the 
>> contentHeight and contentWidth, which are the virtual area, in this case 
>> your grid layout.
>> Give your Grid an id, and set the scrollview contentWidth/contentHeight to 
>> the width and height of the
>> Also, usually you need

[Interest] QML and ScrollView

[Mike Jackson]

I am trying to use a ScrollView in a QQuickWidget but the layout does not seem 
to be honoring what I am wanting. I have a bunch of “Label/TextField” pairs to 
the point where there are so many that I need them inside a scrollview. the 
issue is that if I do that then the TextFields which are set to fill in the 
rest of the row (inside a GridLayout) does not fill the row. If I remove the 
ScrollView then the TextField fills the remainder of the row?
Since this is my first foray into QML I am sure I am missing something 
obvious. this is with Qt 5.5.1 on OS X. I’ll post my 
—
Mike Jackson [imikejack...@gmail.com <mailto:imikejack...@gmail.com>]

 import QtQuick 2.4
import QtQuick.Controls 1.4
import QtQuick.Layouts 1.1
import LeroyJsonStorage 1.0

Rectangle {

// Make the background a bit darker
color: "Light Gray"
border.color: "Black"

ScrollView
{
anchors.fill: parent
height: 800

GridLayout {
columns: 2
anchors.fill: parent
Label {
text: "Foo"
Layout.row: 0
}
TextField {
text: "Bar"
Layout.row: 0
Layout.column: 1
Layout.fillWidth: true
}

Label {
text: "Foo"
Layout.row: 1
}
TextField {
text: "Bar"
Layout.row: 1
}

Label {
text: "Foo"
Layout.row: 2
}
TextField {
text: "Bar"
Layout.row: 2
}

Label {
text: "Foo"
Layout.row: 3
}
TextField {
text: "Bar"
Layout.row: 3
}

Label {
text: "Foo"
Layout.row: 4
}
TextField {
text: "Bar"
Layout.row: 4
}

Label {
text: "Foo"
Layout.row: 5
}
TextField {
text: "Bar"
Layout.row: 5
}

Label {
text: "Foo"
Layout.row: 6
}
TextField {
text: "Bar"
Layout.row: 6
}

Label {
text: "Foo"
Layout.row: 7
}
TextField {
text: "Bar"
Layout.row: 7
}


}
}
}


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[Interest] Compiling Qt 5.5.1 without @rpath on OS X 10.10

[Mike Jackson]

I have self compiled Qt 5.5.1 on OS X 10.10 and everything seemed to have 
worked out fine except that all the frameworks have an install_name starting 
with @rpath. Researching on the internet[1] seems to indicate that adding the 
option “-no-rpath” should take care of that issue (I want full absolute paths 
to each of the frameworks) but after rebuilding with that option I am still 
getting frameworks that have @rpath at the start.

Is this still a bug and not working on OS X? Or did I simply miss something?


[1] 
http://lists.qt-project.org/pipermail/development/2015-September/023069.html 
<http://lists.qt-project.org/pipermail/development/2015-September/023069.html>

—
Mike Jackson

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[Interest] QWebEngine::back() not working

[Mike Jackson]

We are coding up a Qt 5.4.2 application (also tested with Qt 5.5.1) and we are 
using a QWebEngineView. generally the web view works just great. We are able to 
load our documentation into it and view it fine. As a convenience to our users 
we added the traditional “Forward” and “Back” buttons to the window and hooked 
up their slots to the view’s back slot. When the user clicks on the button the 
view is loading the previously loaded web page. We have done lots of 
verification that the QWebViewHistory actually has something in it that we can 
actually load. We read the docs on the slot and even tried coding the long form 
instead of using the actual convenience function. Nothing seems to be working. 
Were we supposed to be doing an actual “refresh” on the view after calling 
“back()”? or did we miss something simple? 

Thanks for any help
—
Mike Jackson


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[Interest] Missing Style Sheets on self built Qt 5.5.1

[Mike Jackson]

We have built Qt 5.5.1 and we noticed in QtAssistant that none of the normal 
page style is there any more. We did omit WebKit since (a) it wouldn’t build 
successfully (b) we did not need it for our project. From poking around at the 
pre-built binaries of Qt it looks like QtAssistant uses QWebKit to for 
rendering. My guess is that it falls back to something simpler if QWebKit is 
unavailable. IF that is the case then I am not going to try to hunt down what 
the issue is.

Thanks
Mike Jackson


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Re: [Interest] Missing Style Sheets on self built Qt 5.5.1

[Mike Jackson]

Thanks for the verification. Didn’t want to waste time digging and reporting 
something that was already known.

I will assume there are plans to move QtAssistant to QWebEngine? Qt 5.6 or Qt 
6.0?
—
Mike Jackson

> On Nov 12, 2015, at 4:49 PM, Thiago Macieira <thiago.macie...@intel.com> 
> wrote:
> 
> On Thursday 12 November 2015 16:19:16 Mike Jackson wrote:
>> We have built Qt 5.5.1 and we noticed in QtAssistant that none of the normal
>> page style is there any more. We did omit WebKit since (a) it wouldn’t
>> build successfully (b) we did not need it for our project. From poking
>> around at the pre-built binaries of Qt it looks like QtAssistant uses
>> QWebKit to for rendering. My guess is that it falls back to something
>> simpler if QWebKit is unavailable. IF that is the case then I am not going
>> to try to hunt down what the issue is.
> 
> You are correct. If QtWebKit isn't available, Qt Assistant falls back to 
> QTextDocument, which is a lot more limited.
> 
> -- 
> Thiago Macieira - thiago.macieira (AT) intel.com
>  Software Architect - Intel Open Source Technology Center
> 
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[Interest] Compile Errors (Qt 5.4.2) with OS X 10.10 and JavaScript

[Mike Jackson]

I am trying to compile Qt with C++11 support on OS X 10.10 using Xcode 6.4 
tooling. 

./configure -opensource -confirm-license -debug-and-release -release -nomake 
tests -nomake examples -no-compile-examples \
-qt-zlib -qt-libjpeg -qt-libpng -platform macx-clang -openssl -c++11 -sdk 
macosx10.9 -no-use-gold-linker \
-dbus -prefix $QT_PREFIX 

I have also adjusted all the mac-* mkspec files to have a minimum OS X 
deployment of 10.9 instead of 10.7 and I get the following compile error. 
Googling the error turns up some webkit bug pages. So I am going to assume that 
this is an issue with the C++11 standard maybe as clearly the Qt folks were 
able to compile Qt and distribute it and the only difference is that I am 
enabling C++11 support.

Should I try Qt 5.5.1 perhaps?


In file included from runtime/JSGlobalObject.cpp:72:
API/ObjCCallbackFunction.h:32:9: fatal error: 
'JavaScriptCore/JSCallbackFunction.h' file not found
#import 
^
In file included from runtime/JSLock.cpp:28:
In file included from runtime/Operations.h:28:
In file included from runtime/JSFunctionInlines.h:29:
In file included from runtime/Executable.h:39:
In file included from parser/SourceCode.h:32:

thanks
--
Mike Jackson [imikejack...@gmail.com <mailto:imikejack...@gmail.com>]

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[Interest] Configure arguments for precompiled binaries

[Mike Jackson]

We are having some issues with mis-matched OS X deployment targets among a few 
of our dependent libraries. In order to try to track down the issue we are 
trying to build our own Qt instead of installing the prebuilt binary from Qt.io 
of Qt 5.4.2. Is there a wiki page or configuration file that has the exact 
“configure” command used to compile Qt 5.4.2?
  We are trying to track down why the min_macosx_version is set to 10.7? And to 
make sure the we are consistently using C++11 and libc++ in all of our 
libraries. 

Thanks
--
Mike Jackson [imikejack...@gmail.com <mailto:imikejack...@gmail.com>]

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Re: [Interest] To rpath or not when building Qt

[Mike Jackson]

On Wed, Mar 11, 2015 at 7:59 PM, Thiago Macieira thiago.macie...@intel.com
wrote:

 On Wednesday 11 March 2015 23:50:52 Nikos Chantziaras wrote:
  On 10/03/15 21:07, Scott Aron Bloom wrote:
   When building Qt for distribution via LGPL of a closed source product
   using shared libraries.
  
   What is the best method to make sure the plugins pickup the Qt
 libraries
   you are shipping?
 
  As Thiago mentioned, you can use RPATH. However, RPATH is overridable.

 s/overridable/non-overridable/

  What you *really* want to set is RUNPATH. If you want to load the
  plugins from a directory that exists inside the directory of your
  executable, then use $ORIGIN as the prefix.

 I personally prefer RUNPATH, so that I can override when I want to.

  For reference, if you want to use RPATH instead of RUNPATH, use:
 
 -Wl,-rpath=\$ORIGIN/lib,--disable-new-dtags
 
  Note: it is somewhat of a nightmare to escape the $ in \$ORIGIN in a
  way that can make it undamaged to the final link command. The shell must
  receive \$ORIGIN, and until it makes it there, it can pass through
  several processing stages. You might need an unholy amount of escape
  sequences ($ORIGIN or similar.) Trial end error :-/

 See Creator's source code for the way to do it with qmake.

 --
 Thiago Macieira - thiago.macieira (AT) intel.com
   Software Architect - Intel Open Source Technology Center


Is there a way to do this _during_ the packaging of the application? If I
add those link commands then will I not need to copy all the Qt Libraries
into my build folder? Anyone have any experience doing any of this from
CMake? It looks like CMake may have something already figured out,
Possibly...

-- 
Mike Jackson
imikejackson _at_ gee-mail dot com
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[Interest] Deploying 5.4.0 Application to Linux

[Mike Jackson]

I am having an issue trying to create a self contained app package on
Linux. Specifically I am using Mint 17.x for development and Qt 5.4.0
offline installer. I use CMake for my build system. I have no issues
debugging my application so that sanity check works from QtCreator.

I have created a folder where I have placed my application (DREAM3D), a
shell script (DREAM3D.sh) and qt.conf. I have also created a lib
directory and a plugins directory. In the plugins directory I have the
platforms directory that contains the libqxcb.so file. I have placed all
the qt libraries in the lib directory. I have exported the LD_LIBRARY_PATH
correctly. I have placed the following in the qt.conf:

[Paths]
Plugins=plugins

When I start the app from the terminal i get the dreaded 

[mjackson@MintDev1:DREAM3D-5.2.967-Linux-x86_64]$ ./DREAM3D
This application failed to start because it could not find or load the Qt
platform plugin xcb.

Reinstalling the application may fix this problem.
Aborted

I have googled about as much as possible. Everyone seems to say the same
thing, to which I have followed the instructions and I _think_ I have
everything setup the way the articles/postings/blogs have instructed but
still nothing is working. Has anyone ever encountered this and what was the
problem?

Thanks for any help.

-- 
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imikejackson _at_ gee-mail dot com
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[Interest] qt_x11_wait_for_window_manager link error on CentOS 6.5

[Mike Jackson]

I am trying to compile some Qt code that is the following:

#if defined(Q_WS_X11)
   extern void qt_x11_wait_for_window_manager(QWidget * mainWin, bool);
   qt_x11_wait_for_window_manager(mainWin, false);
#endif

I am trying to reimplement some of the QSplashScreen with some additional
functionality and I think I may be missing a link library:

This is the error I get during linking:
CMakeFiles/DREAM3D.dir/DSplashScreen.cpp.o: In function
`DSplashScreen::finish(QWidget*)':
DSplashScreen.cpp:(.text+0x33f): undefined reference to
`qt_x11_wait_for_window_manager(QWidget*, bool)'
collect2: ld returned 1 exit status

I have googled as much as I can but can not really reveal what library I am
missing to link against.

This is with a self built Qt 4.8.4 on CentOS 6.5.

Thanks for any help with this.

-- 
Mike Jackson
imikejackson _at_ gee-mail dot com
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[Interest] Qt -4.8.3 self compiled is corrupted when complete

[Mike Jackson]

I am trying to compile Qt 4.8.3 with a fully patched Visual Studio 2010
Service Pack 1 as a 64 bit compile. When the compile finishes and I try to
launch assistant or designer they just crash out. No error dialog or
anything. They just refuse to launch.

I used the following command from a Visual Studio x64 command prompt


configure -confirm-license -opensource -debug-and-release -shared -fast
-exceptions -stl -no-qt3support -nomake demos -nomake examples


I have read around on google that mentions adding -platform win32-msvc2010
which might help but does not in my case.

 I also tried adding -mp to speed up the compiles which did not help
either. Has anyone else run into this type of problem?
-- 
Mike Jackson
imikejackson _at_ gee-mail dot com
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[Interest] Link Errors when Creating a Windows DLL containing Qt Widgets

[Mike Jackson]

I am trying to create a shared library for a part of my project that
contains a class derived from QFrame called QFilterWidget. If I build
the code as a shared library I am getting link errors with the
following output.

19QLeeMarchingCubesWidget.obj : error LNK2001: unresolved external
symbol public: static struct QMetaObject const
QFilterWidget::staticMetaObject
(?staticMetaObject@QFilterWidget@@2UQMetaObject@@B)
19QSMVtkPolyDataWriterWidget.obj : error LNK2001: unresolved external
symbol public: static struct QMetaObject const
QFilterWidget::staticMetaObject
(?staticMetaObject@QFilterWidget@@2UQMetaObject@@B)

I am running moc on the class which generates my moc_QFilterWidget.cxx
file and I have the necessary __declspec(dllexport)/(dllimport) stuff
defined in another header.

  #if defined (PipelineBuilderLib_EXPORTS)  /* Compiling the DLL/Dylib */
#if defined (_MSC_VER)  /* MSVC Compiler Case */
  #define  PipelineBuilderLib_EXPORT __declspec(dllexport)
#elif (__GNUC__ = 4)  /* GCC 4.x has support for visibility options */
  #define PipelineBuilderLib_EXPORT __attribute__ ((visibility(default)))
#endif
  #else  /* Importing the DLL into another project */
#if defined (_MSC_VER)  /* MSVC Compiler Case */
  #define  PipelineBuilderLib_EXPORT __declspec(dllimport)
#elif (__GNUC__ = 4)  /* GCC 4.x has support for visibility options */
  #define PipelineBuilderLib_EXPORT __attribute__ ((visibility(default)))
#endif
  #endif


This is the top part of the class declaration for QFilterWidget:
class PipelineBuilderLib_EXPORT QFilterWidget : public QGroupBox
{
Q_OBJECT;
  public:
QFilterWidget(QWidget* parent = NULL);
virtual ~QFilterWidget();


};

The link errors occur when I am creating a plugin library
(SurfaceMeshPlugin) which uses the library that the QFilterWidget is
compiled into (PipelineLib). I'm not really sure what I am missing at
this point. I am mostly an OS X guy so I may just be missing something
about building Qt based DLL's on windows. Building as a static library
is NOT possible because of a singleton class that is in the
PipelineLib. If I build as a static library then I get 2 distinct
instances of a singleton which is odd but understandable if the
plugin links a static lib and the Application links a static lib.

If anyone might be able to shed some light on how to create a DLL that
has QtWidgets with their signals/slots that would be awesome.

Thanks
-- 
Mike Jackson
imikejackson _at_ gee-mail dot com
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