General and Desktop

Hi, Could you, please, use the below as a title: How to create multiple parallel hierarchical pages under a QStackedWidget in Qt Designer? Take into consideration that other people in the future would like to also get the same help, and the current title does not help make finding this thread easy. Thank you.

@Asperamanca said in Compilation times with Qt6: Hoping for C++ Modules in Qt before I retire... I would not bet on this - from my pov there is way to much work to be done before such a big framework as Qt can use them properly.

@Devesh-Mishra You should not use emptiness or not of stderr to judge whether a program ran "successfully". Use int QProcess::exitCode() const after waitForFinished() to access exit/return code of program. However, you show a batch file which executes various sub-commands. As written I doubt you will get an non-zero exit code from this if one iteration returns that. You may have to rewrite you batch file to achieve that, and IIRC you need to use exit /b exit-code from a .bat file to get it to return a non-0 value to the caller.

@jsulm Thank you very much , This is what i needed.

@JohnyB said in Why increase memory usage of running QApp, after executting Java JAR file in QProcess even if process done?: I suppose that java garbage collector no clean Has nothing to do with your app as you're running Java apps in other processes. At what level does memory consumption stay after running these QProcesses? It is normal that freed memory often stays assigned to the application. You can also use memory profiling tools like Valgrind.

@Qt-Enthusiast said in how to GUI show data in fraction of seconds for large data sets: https://codeshare.io/ZJYk4o I have put the formatted code in the link . PLease review Tip 1: Use the forum code button instead of an external website: [image: 3cd546f4-e93a-4237-8890-534ddf29d9f0.png] or format manually: ``` code goes here ``` Tip 2: For python3, avoid super(Class, object) when super() will work. Can you spot the error? This is valid code, but probably not what is intended. class Base: def __init__(self, *args, **kwargs): print("Base.__init__") class Mid(Base): def __init__(self, *args, **kwargs): super(Mid, self).__init__(*args, **kwargs) print("Mid.__init__") class Derived(Mid): def __init__(self, *args, **kwargs): super(Mid, self).__init__(*args, **kwargs) print("Derived.__init__") obj = Derived() As for the general strategy, displaying or hiding visible items based on what is visible is the job of the view. Unless the overhead of non-viewable items in the scene is significant, don't remove them from the scene. One of the points of the chips demo is to alter the details of the visible items as appropriate, rather than removing or adding them.

@jsulm yes，My widget can be an image, and I am moving the image from the right side to the left side within the specified area. This is a common animation.

Hi, Please provide the following information: Qt kit you are using. Qt Creator version. OS, and if Linux, what desktop environment? I tested that stylesheet on Fedora KDE spin, using Qt 5.15.2/6.2.4/6.6.1, Qt Creator 12, and this MRE: int main(int argc, char *argv[]) { QApplication a(argc, argv); QTabWidget t; t.setStyleSheet(R"(QTabWidget::pane { border: 3px solid rgb(68, 76, 94); } /*======TAB*========*/ QTabBar::tab { /*color: rgb(68, 76, 94);*/ border: 2px solid rgb(68, 76, 94); } QTabWidget::tab-bar:top { top: 3px; } QTabWidget::tab-bar:bottom { bottom: 2px; } QTabWidget::tab-bar:left { right: 2px; } QTabWidget::tab-bar:right { left: 2px; } QTabBar::tab:left:last, QTabBar::tab:right:last, QTabBar::tab:left:only-one, QTabBar::tab:right:only-one { margin-bottom: 0px; } QTabBar::tab:first { border-top-left-radius: 10px; border-top-right-radius: 10px; } QTabBar::tab:last { border-top-left-radius: 10px; border-top-right-radius: 10px; } QTabBar::tab:middle { border-top-left-radius: 10px; border-top-right-radius: 10px; } QTabBar::tab:top, QTabBar::tab:bottom { min-width: 8ex; margin-right: -1px; padding: 5px 10px 5px 10px; } QTabBar::tab:top:last, QTabBar::tab:bottom:last, QTabBar::tab:top:only-one, QTabBar::tab:bottom:only-one { margin-right: 0; } QTabBar::tab:left, QTabBar::tab:right { min-height: 8ex; margin-bottom: -1px; padding: 10px 5px 10px 5px; } /*TAB:SELECTED*/ QTabBar::tab:selected { background: white; color: rgb(68, 76, 94); border-color: rgb(68, 76, 94); border-bottom-color: transparent; margin-top: 0; } QTabBar::tab:top:selected { border-bottom-color: none; } QTabBar::tab:bottom:selected { border-top-color: none; } QTabBar::tab:left:selected { border-left-color: none; } QTabBar::tab:right:selected { border-right-color: none; } /*TAB !SELECTED*/ QTabBar::tab:!selected { color: white; background-color: rgb(68, 76, 94); border-color: rgb(68, 76, 94); border-width: 3px; } QTabBar::tab:top:!selected { margin-top: 4px; } QTabBar::tab:bottom:!selected { margin-bottom: 3px; } QTabBar::tab:left:!selected { margin-right: 3px; } QTabBar::tab:right:!selected { margin-left: 3px; })"); t.addTab(new QWidget, "Variable fisicas"); t.addTab(new QWidget, "Variable fisiologicas"); t.addTab(new QWidget, "Unidad de Control de Agua"); t.show(); return a.exec(); } and I get this: [image: 61409c28-5d4c-4550-96f0-8aee04ef5f27.gif] Which looks normal. I also tried it on in Qt Designer, just slapped a QTabWidget on a QMainWindow and applied the stylesheet on it, and got this: [image: 715530db-bd48-40b5-82c8-e54b32875f4d.gif] I also tried to apply the stylesheet on the main window, and the QApplication just to be sure, but same result.

I will try these suggestions. Thank you very much!

Hi, You can create a proxy style and customize there the rendering of the QRadioButton.

@jsulm said in Installing Qt on Ubuntu...: @SPlatten said in Installing Qt on Ubuntu...: qt5-default Maybe there is no such package in Ubuntu 22.04? Simply search for qt5 packages. @jsulm is correct. If you take this answer on the stack overflow thread, you'll see the change and why. To get started install qtbase5-dev and all the dev packages of the modules you are going to use for developing your application.

@Hachenze I solved this problem. There was a problem with memory alocation. Very stupid me.

@StudentScripter As I said earlier, you can serialize an array or a map of json/xml text, no need for a zip file. For the performance of json, have a test yourself, create a json with a thousand of parameters and look how it works.

@Christian-Ehrlicher I get the correct values (1.12, 98.42, 98.42). I don't understand why it's different in my Qt Creator application.

If you want to select the screen then use the QWindow ctor taking a QScreen. The position can be set via setPosition() but not all window managers (e.g. wayland) allow this.

@Hai-Anh-Luu One simple way to get index is using QLayout::indexOf(QWidget *widget)