General question about 3rd Party Widgets
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Hello All,
I'm completely new to QT Creator, but am a profession C++ developer. I've been googling around and cannot seem to find an answer to this question.I have downloaded the wwwidgets source (I'm on Ubuntu). My question is: should I be able to set these up to be available to drag onto a form in the GUI designer?
Thanks in advance.
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Hi and welcome to the forums.
"downloaded the wwwidgets source"
What source ? Its unclear what 3rd Party Widgets you have source for.
i assume these
http://www.wysota.eu.org/wwwidgets/
it says "All widgets can be used directly from within Qt Designer"So it should produce SO files for Designer.
Note that to use them in Creator/designer, it should be build in
release mode and use same Qt version as the Creator you use. or at least close to.
Also, dont use a gcc too far in version number than the one shown in
Creators "about" menu where you
also see the Qt version.
On windows, this must match 100%, but in linux is a bit more relaxed but
it would not load a Qt5.8 plugin in a 5.7 Creator.If there is no plugin for the widgets , you can still use them visually with the
promotion feature if u just want to check them out.
http://doc.qt.io/qt-5/designer-using-custom-widgets.html
Basically, you first place a widget on a form, then tell Designer the
name and .h file of a custom widgets. its then used as type so when program runs
its the promoted-to type/class that you see and not the plain QWidget.
However, this dont allow setting attributes visually.Update:
Had a look at the source.
After make install step , you should be able to start Creator and see then in designer.
If nothing there. Check SO files been copied to plugin folder.
Its based under Tools
"C:\Qt\Tools\QtCreator\bin\plugins\designer"
( should be same relative location in nix)
If the SO files are there - but not in Creator-Designer.
then you can set QT_DEBUG_PLUGINS (export) in a shell and start Creator from same shell to get info when it tried to load the plugins.
as in
export QT_DEBUG_PLUGINS=1; /fullpath/qtcreator
That should give hint on why they are not being loaded. -
Many thanks for all that information - you're a top bloke !
After compiling in Release, and running sudo make install, the SO files are copied into /usr/lib/x86_64-linux-gnu/, not the plugin folder you mentioned. I have tried manually moving them, but they still do not appear.
So I launched QT with the debug plugin set, and can see lots of different .so files being loaded - but none of them are from libwwwidgets4.so etc (There's no mention of them not loading either).
I'm probably missing something stupid here. Can you help and further ?
Edit : I have now added the files to /usr/ubuntu-sdk-ide/lib/Qt/plugins/designer
and they appear as failed plugins under Tools->Form Editor - About QT Plugins due to verification error.
I'm building a release build by loading the widgets.pro from within the designer, and now manually copying the .so files into the folder above.Any advice would be greatly appreciated.
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Hi and welcome to devnet,
Designer plugins needs to be built with the same version of Qt as was used to build designer. You may have a mismatch there.
