Problem using qwt-5.1.1 with Qt 4.5 under Windows XP

[Uwe]

include( C:\qwt-5.1.1\qwtconfig.pri )

qwtconfig.pri is for building Qwt - not for using it. It is not part of a Qwt installation ( obviously you are running against the build directory and didn't install qwt by make install). And to be honest: the whole thing is much too simple for copying mysterious project files.

All you need to add to your pro file is:

LIBS += /path/to/your/qwt-lib
INCLUDEPATH += /path/to/your/qwt-headers

If you are working with a DLL on Windows you also have to add:

DEFINES += QWT_DLL
--

The Qwt tarball also includes a qwt.prf file. When you have adjusted and installed it, it does the configurations lines above for you and you can simply write:

CONFIG += qwt

But I don't like the concept of prf files much, because they need to be reinstalled, whenever you update your Qt library.

Uwe

[hd_harry]

Uwe:

Thanks for your advice. I downloaded and installed the qwt-5.2 branch from the SourceForge SVN web site. For those who have been following this, the Subversion command I used to do this is:

svn co https://qwt.svn.sourceforge.net/svnr...anches/qwt-5.2 qwt-5.2

(See the pdf file three messages back for more details about what I did.)

Both the qwt examples and the program I'm developing work with this version of qwt and Qt 4.5.0.

For my application, I simplified my .pro file as you suggested in the preceding message.

One additional step that I had to take was to add the path to the qwt dll file to my Windows environment PATH variable (e.g., c:\qwt-5.2\lib). The "make" process works fine without adding the path, but trying to run the executables (both the qwt examples and my program) would fail with a Windows message that qwt5.dll could not be found. Possibly the need to add this path could be included in the qwt Install file either under Section C1 or C1-C3.

Harry

[oswalidos]

Harry :
i followed your pdf ,i just changed something i make my .pro like this :

TEMPLATE = app
TARGET =
DEPENDPATH += .
INCLUDEPATH += C:\svn\qwt\qwt\src
LIBS += C:\svn\qwt\qwt\lib\qwtd5.dll
CONFIG += debug
# Input
SOURCES += main.cpp

TEMPLATE = app
TARGET =
DEPENDPATH += .
INCLUDEPATH += C:\svn\qwt\qwt\src
LIBS += C:\svn\qwt\qwt\lib\qwtd5.dll
CONFIG += debug
# Input
SOURCES += main.cpp

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the problem of qwtd5.dll ,i solve it just by copying it to the debug folder and lauch it ,it works normally .

now i buid my own application with no problem .
but i want to use qwtpicker to pick a curve (rectangular or trapesoidal)
can you tell me how to start ?

[hd_harry]

oswalidos:

I'm using qwt_plot_picker to display the (x, y) coordinate values under the cursor, similar to the bode program in the qwt examples directory. I don't think this is what you are trying to do.

I suggest you take a look at the Event_filter example program. I think it is doing something similar to what you are trying to accomplish.

Harry

[giusepped]

I am quite confused.
We need or not the qwtd5.dll?
Moreover, in qwt-5.2, after compiling, I cannot find any qwt5.dll, but only the qwtd5.dll.
I don't know if this is the problem that make my application to not start anymore (RunTime errors)
G

[giusepped]

One additional step that I had to take was to add the path to the qwt dll file to my Windows environment PATH variable (e.g., c:\qwt-5.2\lib).
Harry[/QUOTE]
But I cannot find any qwt5.dll in Qwt-5.2
G

[Lawand]

Have you built Qwt using qmake?

[giusepped]

Yes, I did.

[Lawand]

Well, did you edit the "qwtconfig.pri" file?
in that case, try re-downloading the Qwt package and do a re-build, because you might have chosen Qwt to be a static library (the case in which you'll only find a "libqwt.a" file)...

[hd_harry]

giusepped,

As Lawand notes, per the INSTALL file that comes with qwt the qwtconfig.pri file may need edited. What I did was comment the "CONFIG += release" line and uncomment the "CONFIG += debug_and_release" and "CONFIG += build_all" lines. Running "qmake qwt.pro" and "make" with those changes resulted in both qwt5.dll and qwtd5.dll being in qwt-5.2.0\lib.

Note that as of March 22nd, qwt-5.2.0 is the current version at SOURCEFORGE.NET so it no longer is necessary to download this version from the Subversion site. I uninstalled the Subversion version and replaced it with the current SOURCEFORGE.NET version. I think there is a typo in the SOURCEFORGE.NET version qwtconfig.pri file. The CONFIG += debug_and_release line I note above reads CONFIG += release_and_release. I changed it to read as CONFIG += debug_and_release as it had been in previous versions.

Harry