Making a Qt custom widget without Qt Creator

Panoss

"Optional". So I can live without it, right?
You mean, 'this is often a good surprise' ?

mrjj

You will need debugger :)
We all do.
And no its was not good surprise.
They come here and say.
"Program crash"
and we go like "ok, place a breakpoint and single step the function to find crash point."

But it can wait till later i guess :)

mrjj

Fast question:
This plugin will run on windows xp?
The app is for Xp?

Note that from 5.7 ( think) its not tested on xp.
Might work or might not. Its not supported.

Panoss

It will run on Win 10, Win 7 and XP.

mrjj

@Panoss
Ok. just asking as XP is not on ppl mind anymore.
https://forum.qt.io/topic/73292/the-last-qt-version-that-supported-windows-xp

Sounds like using 5.6 is the best bet :)

Did u try that version of Creator on xp?

It didn't start or ?

Note that Xp in virtual machine do not have openGL (often) and can only work if started with some option
https://forum.qt.io/topic/36827/qt-creator-3-0-welcome-mode-not-working-in-virtualbox-vm

like
c:\path\qtcreator -noload Welcome -noload QmlDesigner -noload QmlProfiler

Panoss

On XP I haven't tried Qt Creator yet.
I was thinking of trying an older version, and adjusting the code where necessary.

mrjj

@Panoss
well if u go back to Qt4 then all plugin stuff is a bit different. ( from Qt5 series)
So would be great if 5.6 can be used. :)

Panoss

Ok, I installed VS 2015 and the debugger (Windows 10 SDK).
Qt Creator auto-detected the VS compiler and a CDB debugger (this must be from Windows 10 SDK).
This means I 'm ready?
So how do I compile a plugin to dll?

SGaist

Start a "Qt Custom Designer Plugin" project and it will be all prepared for that. This one is under "Other project" in the "New File or Project" dialog.

Panoss

I make a New Project->Qt Custom Designer Widget, Name: I enter 'AnalogClock'->Next but I see no VS kit:

alt text

And no VS kit is auto detected.
Maybe I should add manually a VS kit?

Should I make two projects? The 'main' project in wich the widget will be used, and the project of the widget (plugin)?

Panoss

I tried to add a kit manually, but it raises errors:
alt text

(I changed C++ compiler from MingW to VS2015)

EDIT: Ok, I had forgotten in Maintenance tool to add, at Qt5.8: msvc2015 32-bit, I'm adding it right now.

Panoss

Ok, after adding msvc2015 32-bit in Maintenance tool, everything seems ok.
I built the poject, and a dll was created(!!wow) in my project 's debug folder.

I also now have two folders:
c:\qt\5.8\mingw53_32\bin and
c:\qt\5.8\msvc2015\bin
which have a designer.exe inside.
I run them both (I suppose the one that should show my plugin is the msvc2015\bind\designer.exe) but in none of them appears my plugin.
Also the dll of my plugin was not copied in any of the folders of c:\qt\5.8.

jsulm

@Panoss Try to copy the manually to plugins/designer directory in your msvc2015 Qt installation.

Panoss

I copied it in C:\Qt\5.8\msvc2015\plugins\designer, but it failed: 'uses incompatible Qt library. Cannot mix debug and release libraries':
alt text

mrjj

@Panoss
Try to build it in Release mode and then copy.

Panoss

In the Qt Creator 's 'Release' button, I chose 'release', and build.
In folder C:\Documents\QtProjects\AnalogClockB\build-AnalogClockB-Desktop_Qt_5_8_0_MSVC2015_32bit-Release\release
a dll was created!!! I copied it in C:\Qt\5.8\msvc2015\plugins\designer....and...it appeared in Qt Designer!!! Wow!!

Thank you all guys, your help was great!