General and Desktop

@Pfanne

@JonB said in ui detect mouse event on objects:

@mpergand said in ui detect mouse event on objects:

&MainWindow::on_ioGroup_clicked);

OIC I missed that when OP said it was correct.

You can see for yourself (when it's written in monospace) that in your
connect(ioGroup, &QButtonGroup::idClicked, this, MainWindow::on_ioGroup_clicked);

one method reference has a preceding & and the other does not, and thereby tell what you had is not correct.

@kadet1090 I'm not sure if it's supported but try

QTreeView::item:selected { background: transparent; }

@__d4ve__ Further to @jsulm's question, you may find it useful to add this at the top of the TrayIconApp constructor/destructor

qDebug() << "Construct" << this; qDebug() << "Destruct" << this;

and this in the slot:

qDebug() << this << "onSyncChanged called with:" << sync;

Then you will see which TrayIconApp object gets created and which object, if any, receives sent signals.

What is the life span of client? In your connect(), client appears to be a stack-based instance of the Client class.

@J-Hilk
add_executable(client
client_main.cpp
client_main_window.cpp
client_manager.cpp
client_chat_window.cpp
chat_protocol.cpp
chat_line.cpp
)
target_link_libraries(client PRIVATE database_library)

qt_add_resources(client "images"
PREFIX "/images"
FILES send_icon.png
)

set(MACOSX_BUNDLE_INFO_PLIST ${CMAKE_CURRENT_SOURCE_DIR}/Info.plist)

set_target_properties(client PROPERTIES MACOSX_BUNDLE ON)

This is the CMake file related to the executable I am having prob ton have access to the Microphone. I did setup the Info.plist file.

The server page was not loading and the issue was I was using the server's newConnection() signal to immediately write the html page to the client. But you have to wine and dine the client first. I ended up connecting the newConnection() signal to a set up function:

void Server::handleConnection() { QTcpSocket* client = nextPendingConnection(); //client->setSocketOption(QAbstractSocket::KeepAliveOption, 0); QObject::connect(client,&QTcpSocket::readyRead,this,[=](){ handleRequest(client); }); }

You can then write the HTML content to the client in handleRequest()

@fontcolorhelp For Ubuntu, try to find qt deb files and download them to install. Ubuntu 22.04 has Qt 5.15.3.

@SGaist said in How do I freeze the first row in a QTableWidget?:

use the answer arrows rather than the quick answer box.

Thanks, I discovered that after the first time I used it... :)

@Sadok_J

Do you use the Online Installer?

i'm not sure what boxes should i check in the personalized installation for me to work with thoses modules and functions

If you are not sure what to pick and just start to use Qt for Qt Widget applications, go for the pre-configured installation.
Don't know what the latest version in Online Installer currently shows, but it says something like
Qt 6.7 for Desktop Development.
Can't do wrong with this. There is QtCreator (the IDE with QtDesigner), the Qt Framework itself and every tool you need to start writing your first app, included

@Christian-Ehrlicher Ok, i'm going to use a signal/slot like solution.

It's both more clean and safety.

@sburtchin said in Qt Designer/Creator/Design Studio - Which Should I Use?:

The background color needs to change to indicate context. With .NET I had to add additional labels to patch the background and change this for every widget. With Qt I only will have to change the background for two widgets.

This can be done using Qt stylesheet very easily

https://doc.qt.io/qt-6/stylesheet.html https://doc.qt.io/qt-6/stylesheet-syntax.html https://doc.qt.io/qt-6/stylesheet-customizing.html https://doc.qt.io/qt-6/stylesheet-examples.html

In the background it is checking literally trillions of possibilities for the best fit. The button comes with a warning for users who don't have really fast computers.

that sounds like it could use some optimization.
Some reworks when porting to C++ / Qt :)
But definitely use Qt's Multithreading technologies, otherwise you will block the main GUI thread and make the window unresponsive.

@Christian-Ehrlicher Good point. Busy with a release and no time to check it out. The bug report has been marked as Critical by Qt guys.

This setting works well in Qt5. Qt6 may be different. There is one example here.
https://doc.qt.io/qt-6/qml-qtquick-window.html#visibility-prop

Hello, after reading your comments and performed multiple tests I solved it using the class QtConcurrent

I called a slot from html/js which contains the start of the process where the loop is executed

Solt Call method with process lancheur QtConcurrent

void EngineIndexHtml::execLauncherBackupJob(QJsonObject jsonParameter) { extern void execLauncherJob(EngineIndexHtml * EngineHtmlObj, QJsonObject jsonParameter); QtConcurrent::run(execLauncherJob, this, jsonParameter); }

Part of method execLauncherJob where EngineHtmlObj is mother class where there is declare signal

for (int i = 0; i < arrayDataRowLauncher.size(); i++) { . . . . emit EngineHtmlObj->elabCheckStatusLauncher(jsonObjectDataRowLauncher); goLauncher(jsonObjectDataRowLauncher, strOriginFolder, startThread, endThread, iCoreIndex); . . . . }

Now is all ok.
Thanks to everyone who supported me and put up with me

@mrdebug someone said state change is ok.
https://forum.qt.io/topic/77694/detect-when-webcam-is-unplugged/13?_=1714657097024

And you are using FFmpeg, not gstreamer.

@Christian-Ehrlicher just coincidence. I needed a style that worked and it doesn‘t look bad. And I admit I only saw the „ugly“ Windows style as the other alternative and overlooked „windowsvista“ :D

@Rozerin-YILDIZ said in How to create relation between main ui and different cpp/h files?:

There will be just one .ui file (mainwindow.ui)

The UI file is not directly connected to your class structure... As you might know, you don't need any *.ui files at all. Everything can be done by code.

I want to split this issues (if it makes sense)

Make no sense to me to split the MainWindow content into multiple classes / files. If it's shown (used only) in your MainWindow widget, what's wrong with having the code there?
QMainWindow after all is just another widget, that you can fill with content.

As I've said in your other topic, you can make widget "factories" to create and return the new widget to your main window.
But this is also not needed.

And if you subsclass some widget, you have your own separate class (files) anyway, which you include in your MainWindow header or code file.

@Kirill-Gusarev See @SimonSchroeder explanation and also read https://doc.qt.io/qt-6/threads-qobject.html