General and Desktop

It looks like Assistant's display is implemented via QTextBrowser, which makes no mention of javascript or QJSEngine in the documentation. As such, embedded javascript won't work.

An application could use QTextBrowser::highlighted() to detect the mouseover and alter the underlying document as desired.

@SGaist said in Rendering FHD images as video:

You can create it once and then update its content.

I've done that. Something kinda like this:

void initializeGL() override { initializeOpenGLFunctions(); m_tex = new QOpenGLTexture(QOpenGLTexture::Target::Target2D); m_tex->create(); m_tex->setSize(4000, 4000); // Maximum possible frame resolution m_tex->setFormat(QOpenGLTexture::RGBA8_UNorm); m_tex->allocateStorage(QOpenGLTexture::RGBA, QOpenGLTexture::UInt8); m_tex->bind(1); } void paintGL() override { QImage *img = this->GetCurrentImageFrame(); m_tex->setData(0, 0, 0, img->width(), img->height(), 1, 0, QOpenGLTexture::RGBA, QOpenGLTexture::UInt8, img->constBits()); }

But there are no performance improvement.

I guess 30 FPS is the maximum my machine can do, so I would just move on with it. Maybe I will implement a toggle so user with more powerful machine can run it in 60 FPS.

I will now close the thread, thanks for everyone helping.

QKeyEvent::text() should return QString("#").

Hi,

You can pass additional modules to include to macdeployqt. Add those that are missing currently.

@Pl45m4 Thank You for your feedback. I am learning QT and would like to be able to do this;

void SchedulePanel::on_OrderEntry_PB_clicked() { order *OrderEd; OrderEd = new order (); OrderEd->show(QModelIndex SelectedSchedule); }

Is That possible?
Thanks

Thanks so much! Your response is awesome!

@rupertrupert said in on Dialog box show() is not working but exec() is:

after my main window is closed

Usually your program would end at this point...
Post the related code then... this isn't a Q&A game here.
We can't see what your are doing exactly

@Gandalf404 said in How to pass QSqlRelationalTableModel object to a class constructor (from main.cpp):

I just trying do not create unnecessary objects of QSqlRelationalTableModel, so i thought better just pass it through widgets

Like I've said, create it in your widget where you need it.
That would make one instance only.
Or for what reason you need it in main()?

@Mark81
I have not checked, but isn't the new row and its record only inserted into the in-memory model at this point, it has not yet been inserted into the backend database? You can still edit/change it in code, before the user performs any edits, and it is not committed until you move off that new row?

@jbosak said in QThreadPool not always emitting (custom) finished signal:

I'm trying to make use of QThreadPool and want to be able to have a signal be emitted when the QRunnable passed in is started and finished.

This looks like functionality provided by QtConcurrent::run() and QFutureWatcher.

I would expect to have somewhere a list of the platform where the value is in use. I haven't checked all the platform backends. Just the Linux ones where I haven't seen the value in use.

@FleetingMemory They will not fix it for you. Maybe you can dig into the source code of this module and try some fixes. Then build it for yourself.

Are other applications behaving in a similar fashion ?

When a queued slot connection is invoked, it (roughly speaking) goes to the back of the target object's thread's event queue. The slot is invoked only after all the events that are in queue before it get handled - one at a time, of course, since it is a single thread's events.

If the time for the slot event to reach the front of the queue (also known as "event loop lag") is too high, it is because there are many events in the queue and/or handing them is slow. The reasons for that are practically infinite, and it is hard to say without much more information, but it might be a UI element that gets repainted too often (e.g. due to unnecessary or too wide calls to update()), or maybe a different widget that takes long to paint (re-doing text shaping is a not uncommon culprit), or maybe a O(n^2) algorithm hiding in a slot, or maybe large data being copied inadvertently (perhaps due to unnecessarily causing Qt's implicitly shared collections to detach) , or maybe god forbid blocking I/O or sleeps somewhere.

The best tool to diagnose such things is an instrumenting profiler (e.g. callgrind), GammaRay can also provide some specific insight about event handling, and you can always improvise something with a application event filter.

Good luck!

@Carlosyoot
selectionBehavior : SelectionBehavior
enum QAbstractItemView::SelectionBehavior

selectionMode : SelectionMode
enum QAbstractItemView::SelectionMode

@architect23

In first string I always get zero, I don't understand why?

Depends what data you have in model->data(left), which nobody but you knows, and for that matter which model model refers to. How should anyone answer?

@oneeyeman1 said in No pen cursor n Qt library:

So any chance I find this icon/pixmap on Linux somewhere?

If you don't check you will never know :)
Go where the icons are stored for your Linux distro...
As there was said before... if there isn't such standard icon, you have to create your own cursor set and ship it with your app... like most painting tools, games and other programs do

check dependencies
ldd path/libibusplatforminputcontextplugin.so export QT_DEBUG_PLUGINS=1 to check if this plugin is loaded or run
strace your_app to check if the plugin is loaded correctly. rebuild Qt with flag: -ibus from the source