Arch does package qtcreator-devel. See https://archlinux.org/packages/extra/x86_64/qtcreator-devel/

@jdent said in How do I share a custom chart widget i developed for Qt Designer?:

I understand part of being in the open source license is that we contribute

You don't have to. It's always nice, but nobody forces you to share your projects that you have created with your community license.

Well, I have developed a QtDesigner plugin widget for charts I would like to share.
How do I proceed?

Read about how to deploy an app:

https://doc.qt.io/qt-6/windows-deployment.html https://doc.qt.io/qt-6/deployment.html https://wiki.qt.io/Deploy_an_Application_on_Windows

@jdent said in My custom Qt Designer widget does not change size!:

How do I make the plugin to grow and shrink?

You apply a layout to the widget rather than resorting to manually dealing with the geometry of the client chart

See https://doc.qt.io/qt-6/sharedlibrary.html

Something along the line of:

DESTDIR = $$OUT_PWD/../app_project/plugins/myplugins

Where app_project is the folder where your application is built and myplugins is the sub folder where you load your plugin from.

Ok, here is my progress. Here the CMakeLists.txt of my plugin

set(TS_FILES i18n/MyPlugin_en.ts i18n/MyPlugin_fr.ts ) # Adding translations qt_add_translations(MyPlugin TS_FILES ${TS_FILES} LUPDATE_OPTIONS -no-obsolete OUTPUT QM_FILES) install(FILES ${qm_files} DESTINATION ${CMAKE_INSTALL_BINDIR})

Initially the MyPlugin_*.ts files are empty, so I need to go to the i18n folder and to run lupdate there. Then I translate strings.

Finally, I compile. There is no error but the strings of MyPlugin are not translated.

Any idea about what is missing?

@odelaune Thanks, pls mark the thread solved!

Hey @mrjj
Digging out this topic... as I figure better to stick it in the same tree...

Anyway, any idea how to make QScrollArea behave correctly too? Making it container does not let me drag widgets on it :/

@amrhus There are a lot of question with exactly your problem. Please use the search function and search for "Could not load the Qt platform plugin "xcb" in "" even though it was found.".

@Dariusz

Hi
Yes you can.
see this example (and reads the docs SGaist links)

https://doc.qt.io/qt-6/qtwidgets-tools-plugandpaint-app-example.html

Here the drawing app is extended with extra plugsins.

Do note, however, that you will need to do as sample does in
"The next step is to load dynamic plugins"

where is enumerate the files in a given folder using

const auto entryList = pluginsDir.entryList(QDir::Files); for (const QString &fileName : entryList) { QPluginLoader loader(pluginsDir.absoluteFilePath(fileName)); ...

so its not 100% automatic but almost ;)

Aaand your feeling was spot on ! That was indeed the issue !
Thank you very much !

@cristian-adam Thank you! This is exactly what I was looking for.

@thaidy said in QT Deploy QPSQL Plugin:

@hskoglund said in QT Deploy QPSQL Plugin:

what happens if you move the declaration into for example your MainWindow.h class:
QSqlDatabase DB;
DB = QSqlDatabase::addDatabase("QPSQL"):

IT WAS THAT, THANK YOU VERY MUCH!!

Glad this has solved problem, certainly better than some static variable.

However, this is still not right/advised. Per https://doc.qt.io/qt-5/qsqldatabase.html#details, red box warning:

Warning: It is highly recommended that you do not keep a copy of the QSqlDatabase around as a member of a class, as this will prevent the instance from being correctly cleaned up on shutdown. If you need to access an existing QSqlDatabase, it should be accessed with database(). If you chose to have a QSqlDatabase member variable, this needs to be deleted before the QCoreApplication instance is deleted, otherwise it may lead to undefined behavior.

Qt asks you to simply call
static QSqlDatabase QSqlDatabase::database(const QString &connectionName = QLatin1String(defaultConnection), bool open = true)
whenever you need to access a QSqlDatabase, and not to keep even a member variable QSqlDatabase around. You don't need it.

@vin212 said in How use MYSQL on QT:

MySql .................................. no

...

I continue, i try this commande : nmake

Why? As you can see qmake did not find your libs, so why do you think 'nmake' will do anything for mysql? As written in the documentation look into the logs and see why the libs were not found or usable.

There are some Docker files in Creator's own repo: https://code.qt.io/cgit/qt-creator/qt-creator.git/tree/tests/manual/docker

@TonyRietwyk said in Qt 5.15.5 cannot load custom designer plugin:

Does the installed Designer need 64-bit dll's?

Designer or Creator? (Qt Creator has an embedded version of Qt Designer)

Recent releases of Qt Creator are 64-bit. You can check by clicking Help > About Qt Creator...

I'm not sure about the bitness of the stand-alone Qt Designer .

API-MS-WIN-CORE-SYNCH-L1-2-0.DLL seems to be causing a cyclic dependency with KERNEL32.dll.

The API-MS-*.dll are usually false positives. Ignore them.

I have Qt5.15.5/5.15.5/msvc2019/bin in my system path.

This often causes problems... I highly recommend you don't put Qt in your PATH. You can break other apps on your PC that depend on a different version of Qt.

@TonyRietwyk said in Qt 5.15.5 cannot load custom designer plugin:

Turns out the problem was fixed by copying zlib1.dll into the 5.15.5\msvc2019\bin folder

That should go into the folder which contains your plugin, not into your Qt folder.

Again, I recommend you remove Qt from your PATH.