QT Error with Twain Data Source

[mrjj]

Hi
you installed
qt-opensource-windows-x86-vs2008-4.8.7.exe ?
and you had vs 2008 already installed?

what does it list in Qt versions tab?

[bhim]

Yes, i installed and used qt-opensource-windows-x86-vs2008-4.8.7.exe

It list only None in QT Version tab.

I had vs 2008 also already installed.

Please help.

[mrjj]

@bhim
Hi
It should have picked it up.
Not sure what went wrong.
Sadly i dont have any vs 2008 to test with and not sure why no Qt is listed.

Give some time. Maybe someone is still using vs2008 :)

[bhim]

Also this is what i have installed, can this be the culprit?

Meantime i will also try on a machine where vs2008 is not installed.

[mrjj]

@bhim
Did you also install a QT binary ?
That is only the editor
named something like Qt 2008 visual studio 2008

can you show image of all that can be selected?

[bhim]

I am not sure if i installed QT binary. Can you please provide me download path? Also the QT Version drop down is only show None.

[bhim]

Hi ,

Thanks for your help. I m able to open and configure the project now. But getting below error when i build it. Can you please have a look and help.

[mrjj]

@bhim
seem to be kinda old/invalid .pro file
can you show what is inside?

[bhim]

Below is the content of pro file

unix {
TEMPLATE = subdirs
VERSION = 1.0
DEFINES += UNIX
}

SUBDIRS = src

I have also shared entire project at below location for you.

https://drive.google.com/drive/folders/1gj69Kh7Xy8-p91uE3QUao673wqxoHidx?usp=sharing

[mrjj]

@bhim
its wrong project file
there is
src.pro
in src

that seems better

[bhim]

Thanks It much better now. Though i am still getting lot of errors but these are datatype error and seems like code specific.

Thanks a lot for your help.

Bhim

[mrjj]

@bhim
Np.
I noticed there are some FreeImage lib files.
Not sure it uses it but make sure they are compatible with vs 2008 if it does.

Its pretty old project. there are no newer twain samples?

[bhim]

This is the latest sample they have. With this i m getting below error , would you be able to help with this one as well?

I know how to take care of these in VS but not in QT.

[mrjj]

@bhim
Well Qt is just a normal c++ LIB
and those are normal windows API calls so fix them like you normal would.
seems to be unicode related.
Didnt it later become common to put _TCHAR or something in front ?
or use wchar_t* and not char * ?
maybe you can just use the A version of the API and not W version

[mrjj]

Hi
I wondered if
https://github.com/twain/twain-samples
is something else than the twain you try ?

[bhim]

I tried the exact same exact same Twain.

[mrjj]

@bhim
Ok but it didnt work or was not what you wanted?

[bhim]

It did not work. However i am able to resolve most of the error for data type conversion. I am now stuck at below, i am not able to go to definition\declaration of this method to make any change. I know how to do it in Visual Studio but not in QT. Can you please help

[bhim]

Hi,

I have resolved all string related error. Now my project is showing this :-1: error: LNK1104: cannot open file 'freeimage.lib' . If i could find the Visual Studio equivalent or Project property in QT, that would be very helpful to very file the linker paths.

[mrjj]

@bhim
you mean to link the LIB file to the project ?
http://doc.qt.io/qt-5/third-party-libraries.html
http://doc.qt.io/qtcreator/creator-project-qmake-libraries.html

Basically you need a
LIBS += -L"3rdparty/CatWhisperer/lib" -lCatWhisperer
(with correct names of course)