gmane.comp.graphics.qwt.general

hi!

Axel Huelsmann — 2013-05-08T00:13:22

  http://wpbiz.info/wp-content/plugins/tv1/work.php?mawspumqx792tw

















































































































axhuelsmann
Axel Huelsmann
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Re: rich text legend

Uwe Rathmann — 2013-05-02T05:16:28


The question seems to be about how to align a multiline text to a check 
box - right ?

Uwe


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rich text legend

HongLiang Wang — 2013-04-30T08:06:01

Hello all,

I was using check box as legend item, but the requirement now changes to
display multiple lines for single legend. For example legend text
"F_JD20F2_MSSQL_ERROR
F_JT01E4_INTEG_UNRECOV_FAIL_FREQ F_JT0207_INTEG_NOT_SAVEABLE
F_JT04A1_NET_VERSION" needs to be displayed like

F_JD20F2_MSSQL_ERROR
F_JT01E4_INTEG_UNRECOV_FAIL_FREQ
F_JT0207_INTEG_NOT_SAVEABLE
F_JT04A1_NET_VERSION

I thought it may be easier to use rich text. So my first attempt was to
replace spaces with <br> in legend text then creates a legend item widget
containing a checkbox and a label. The reason is that checkbox does not
understand rich text.

Result turns out not to be satisfactory since labels are not aligned.
Sample code is:
 QWidget*
 JBStatCurve::legendItem(void) const
 {
     QWidget *legend_tab= new QWidget(plot);
     QHBoxLayout *legend_lay= new QHBoxLayout(legend_tab);
     legend_lay->setSpacing(0);
     legend_lay->setMargin(0);

     QCheckBox *check_box= new QCheckBox("", legend_tab);
     QPalette *palette= new QPal

Re: qwt on imx6

Alexander Keller — 2013-04-09T14:24:02

That is great news thanks frank.

Alexander
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Re: qwt on imx6

K. Frank — 2013-04-09T14:09:06

Hi Alexander and Uwe!

On Tue, Apr 9, 2013 at 1:22 AM, Uwe Rathmann <Uwe.Rathmann< at >tigertal.de> wrote:

I don't believe this is correct. I agree that Qt Designer produces XML
code (the .ui files output by Designer).  But I believe that the XML code
is then processed by the UI Compiler, uic.exe, into a legal c++ header
file, e.g., ui_my_designed_form.h, that contains primarily the (inline)
function Ui_MyDesignedForm::setupUi that instantiates the various
component widgets, sets their layouts and parents, etc.

So at run time no XML gets read and processed (but the results of
processing the XML at build time by uic.exe do get run).


Qt Designer runs on the build machine -- the host.  The qwt Designer
plugin runs as part of Designer, and therefore also on the host.
uic.exe also runs on the host.  So none of these things needs to
be compiled for your i.mx6 board -- the target.

Only the actual application (and the Qt libraries) need to be compiled
for your target.  This includes code that was produced by uic.exe

Re: qwt on imx6

Uwe Rathmann — 2013-04-09T05:22:33


The designer produces XML code that is processed by the application at 
run time. So as long as the version on the host ( = where the designer 
runs ) is compatible: yes.

Uwe


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Re: qwt on imx6

Alexander Keller — 2013-04-08T19:24:35

If I build an app for the i.mx6 using the qwt plugin. Well it run on the
i.mx6 board?

Alexander
On Apr 8, 2013 2:17 PM, "Uwe Rathmann" <Uwe.Rathmann< at >tigertal.de> wrote:

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qwt on imx6

Alexander Keller — 2013-04-08T16:23:31

Hello, 

 

I have been trying to build qwt for the Freescale i.mx6 processor. I have
successfully built  the qmake for the i.mx6. I am using qt version 4.8, and
I have been able to successfully build qwt for my host machine. My host is a
Ubuntu machine on intel x86 processor. However, when I try to build the qwt
plugin I get the following error. 

 

/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-li
naro-toolchain/bin/../lib/gcc/arm-fsl-linux-gnueabi/4.6.2/../../../../arm-fs
l-linux-gnueabi/bin/ld: cannot find -lQtDesigner

 

Thanks for your help,

 

Alexander Keller 

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Re: qwt on imx6

Uwe Rathmann — 2013-04-08T18:16:45


It doesn't make much sense to cross compile designer classes or any 
plugin as you probably will never run the designer/creator on the 
target. That's why Qt has been built without designer support and you 
should do the same with Qwt:

The first step of the INSTALL instructions is to read and edit 
qwtconfig.pri. Simply add a "#" at the beginning of the line, where 
building of the designer is enabled ( or remove the line completely ).

Uwe


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Re: [Interest] Qwt and upgrading to Qt 5

K. Frank — 2013-03-24T23:11:48

Hello Sergey!

On Sun, Mar 24, 2013 at 4:31 PM, Sergey Popov <popov_sergey< at >ukr.net> wrote:

I've already upgraded to qwt 6.0 (but not Qt 5).  Would you happen to
know if these issues you mention were specific to qwt 6.1, or do you
think they would apply to qwt 6.0, as well?

I don't believe I use QString::toAscii, so that particular Qt 5 issue
probably won't matter to me.  I do use QwtPlotCurve, although, off
hand, I don't recall whether I use its copy constructor.


Thanks for the heads-up on the issues you've encountered.


K. Frank

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Re: [Interest] Qwt and upgrading to Qt 5

Uwe Rathmann — 2013-03-22T14:34:02


On X11 you will see performance regressions as the X11 paint engine ( = 
hardware accelerated rendering ) is gone. When working with remote 
desktops Qt5 is almost a no-go.

On QWS you might also run into regressions, but on all other platforms 
Qt5/Widgets is more or less the same - meaning that you won't have many 
problems ( and not much to win ).


For Qt 5 you need Qwt 6.1. If upgrading from Qwt 6.0 to Qwt 6.1 makes 
sense for you depends on your requirements. But in general it can be 
said, that here are many, many new features and maybe a couple of 
interesting performance related hacks.

APIs have been changed, but differences between Qwt 6.0 and Qwt 6.1 are 
by far less than between Qwt 5.2 and Qwt 6.0.

Uwe




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Re: [Interest] Qwt and upgrading to Qt 5

2013-03-22T02:06:06

It wasn't hard at all. Most of it ran without modification. As long as you  
have the line added to the PRO file that adds widgets, everything will 
probably  go easy.
 
So if you add that line in the pro file and then try compiling it. You'll  
know soon enough ;-)
 
Dean
 
 
In a message dated 3/21/2013 6:40:47 P.M. Pacific Daylight Time,  
kfrank29.c< at >gmail.com writes:

Hi  Dean!

On Thu, Mar 21, 2013 at 8:10 PM, wrote:

Thanks for the  feedback.

that

I have some relatively simple desktop  applications.  Probably the
"fanciest" thing I do with Qt is use some  simple qwt plots.

Could you give me some sense of just how involved or  simple porting
my Qt 4 code to Qt 5 is likely to be?


I appreciate hearing about your  experience.


K. Frank


I am

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Re: [Interest] Qwt and upgrading to Qt 5

K. Frank — 2013-03-22T01:37:53

Hi Dean!

On Thu, Mar 21, 2013 at 8:10 PM, wrote:

Thanks for the feedback.


I have some relatively simple desktop applications.  Probably the
"fanciest" thing I do with Qt is use some simple qwt plots.

Could you give me some sense of just how involved or simple porting
my Qt 4 code to Qt 5 is likely to be?


I appreciate hearing about your experience.


K. Frank



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Re: [Interest] Qwt and upgrading to Qt 5

2013-03-22T00:10:52

I really didn't have any problems that I can remember. I had a bigger issue 
 in my own code making the conversions from Qt4 to Qt5. Just make sure that 
you  have 
 
greaterThan(QT_MAJOR_VERSION, 4): QT += widget
 
in your *.pro file. That will allow you to still compile under Qt4. There  
are a few more issues but they are Qt5 related and not Qwt.
 
Regards,
Dean Nelson
 
 
In a message dated 3/21/2013 3:52:22 P.M. Pacific Daylight Time,  
kfrank29.c< at >gmail.com writes:

Hello  Lists!

I am considering upgrading to Qt 5 (from Qt 4), but I also use  qwt, and I 
am
wondering whether I should expect any significant issues  doing so.

(As I've outlined in some related posts, I am considering  upgrading the
compiler and various libraries I use, in part with an eye on  using c++11
features.  I am currently using one of Ruben's mingw-w64  gcc 4.7 builds.)

I am using qwt 6.0.1 with Qt 4.  (I upgraded from  qwt 5 a little while back
without too much difficulty.)

How does qwt  (version 6, presumably) work with Qt 5?

[Interest] Qwt and upgrading to Qt 5

K. Frank — 2013-03-21T22:49:29

Hello Lists!

I am considering upgrading to Qt 5 (from Qt 4), but I also use qwt, and I am
wondering whether I should expect any significant issues doing so.

(As I've outlined in some related posts, I am considering upgrading the
compiler and various libraries I use, in part with an eye on using c++11
features.  I am currently using one of Ruben's mingw-w64 gcc 4.7 builds.)

I am using qwt 6.0.1 with Qt 4.  (I upgraded from qwt 5 a little while back
without too much difficulty.)

How does qwt (version 6, presumably) work with Qt 5?  Does this proposed
upgrade make sense, or are there likely to be difficulties involved?

Thanks for any information.


K. Frank

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Re: 6.1rc3 small API change request

Uwe Rathmann — 2013-03-21T21:01:46


You can write:

abstractScaleDraw()->enableComponent(
     QwtAbstractScaleDraw::Labels, false);

Uwe


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6.1rc3 small API change request

Glenn Ramsey — 2013-03-21T19:26:15

Hi,

In qt_slider.h would it be possible to make

     QwtScaleDraw *scaleDraw();

protected instead of private?

The reason is that in a derived class I need to do this:

scaleDraw()->enableComponent(QwtAbstractScaleDraw::Labels, false);

Glenn

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PATCH: M_PI_2 for MinGW-w64

Peter Kümmel — 2013-03-03T11:08:15

Up to Qt 4.8.4  M_PI_2 is not known by MinGW-w64 when compiling with -std=c++11.

http://qt.gitorious.org/qt/qtbase/commit/d3c1a9f38784c8d3a439517cc971320d74613869?format=patch

In 4.8.5 it should be fixed.

Peter
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Qwt installation error on Windows 7

marble_developer marble_developer — 2013-03-01T14:10:41

Hi,

I've downloaded the qwt-4.2.0-setup-qt230nc.exe executable file and I've
installed it. Then I've downloaded the latest version of MinGW and finally
I've installed Qt 5.0.1 with Qt Creator 2.6.2 for Windows (MinGW).

Later I've opened a command line, cmd, and I've put this commands:

cd "Program Files (x86)\Qwt"
path C:\Qt\Qt5.0.1\5.0.1\mingw47_32\bin
qmake qwt.pro
path C:\MinGW\bin
mingw32-make

and I get this output:

mingw32-make -f Makefile.Release
mingw32-make[1]: Entering directory `C:/Program Files (x86)/Qwt'
g++ -c -pipe -fno-keep-inline-dllexport -O2 -Wall -Wextra -frtti -fexceptions -m
threads -DUNICODE -DQT_DLL -DQWT_DLL -DQWT_MAKEDLL -DQT_NO_DEBUG -DQT_GUI_LIB -D
QT_CORE_LIB -DQT_OPENGL_ES_2 -DQT_OPENGL_ES_2_ANGLE -I. -I"include" -I"..\..\Qt\
Qt5.0.1\5.0.1\mingw47_32\include" -I"..\..\Qt\Qt5.0.1\5.0.1\mingw47_32\include\Q
tGui" -I"..\..\Qt\Qt5.0.1\5.0.1\mingw47_32\include\QtCore" -I"src\moc" -I"..\..\
Qt\Qt5.0.1\5.0.1\mingw47_32\mkspecs\win32-g++" -o src\obj\qwt_autoscl.o src\qwt_
autoscl.cpp

Re: Qwt installation error on Windows 7

marble_developer marble_developer — 2013-03-01T15:11:11

I've solved it installing Qwt 6.1 ( = SVN trunk ).

2013/3/1 marble_developer marble_developer <marbledeveloper< at >gmail.com>

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Re: qwtplot border color

Soren Christensen — 2013-02-25T06:34:32

Thanks for the help,
 It seems this was caused by the Style I got off Qapplication.
Now I just go with the default and set the Pallete to black and that seems
to do it.

Soren


On Mon, Feb 18, 2013 at 10:49 PM, Uwe Rathmann <Uwe.Rathmann< at >tigertal.de>wrote:

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