Qt load stylesheet from file. Use simple format like this: 2.

Open both files and for each variable in definition file change its occurrence in qss file with the value (string) from the definition file. The trick here, though, is that I don't want to store all the variables and Jun 14, 2021 · 2. First, start importing our module . h" #include <QApplication> #include <QFile> int main(int argc, char *argv[]) {. cpp. So if I set the same value using stylesheet then it works, but in this case I need to write a css file dynamically and force it to be used only for the specific module that uses it within the application. Note that QML singletons require a qmldir file with the singleton keyword preceding the Style type Jun 10, 2014 · This is useful if your application always needs a certain set of files (icons, translation files, etc. MainPage->setStyleSheet(QString()) // a stylesheet is applied to MY C++ widget. This happens even if there's no CSS added to the . You can delete any files created, except the . __init__(self, parent) UI_PATH = QFile(":/ui_file/test. Qt just looks relative to the current working directory; in your case relative to the ex Sep 3, 2020 · I just don't understand the purpose of the load_ui function inside the MyMainWindow class. cpp and theme. See styleSheet property. environ ['PYQTGRAPH_QT_LIB']) # run window. I have a class called MyWidget and I'm trying to load a global style using this code on my main. Select the location. 2, it is possible to edit stylesheets in Qt Designer with the stylesheet editor. （如果已经创建过资源文件，则跳过该步）. With this, Qt has no idea where your style sheet comes from. Sep 22, 2022 · This is the code in the cpp file I used to change the color of the text. Only the qss file inside the "Other files" directory. Add New. The stylesheet has a resource "qrc" file which is recognized by QT designer. This is not a good way or the elegant way to do it. Style sheets are applied on top of the current widget style 1. This however is problematic since they could not load images in the styles initially. – Xamgu is a loader for Qt's QSS style sheet files and file groups boasting some much needed syntactic sugar! Using these extensions you not only can avoid copy and paste but also define variants of your styling like the much needed Dark/Light styling themes as demonstrated in the "Demo App" section below! The supported extensions are: Jul 23, 2014 · Qt style sheet doesn't support all what CSS proposes, that's one of the reason why qss is used. @QFont font; font. Jul 27, 2012 · Don't know if that would help, but you can try setting the style sheet on your topmost widget (usually a QMainWindow) with ::setStyleSheet(). jpg" doesn't work. styleSheetStr = QtCore. . The Qt resource system is a platform-independent mechanism for shipping resource files in an application. The left and right corners are styled using the ::left-corner and ::right-corner respectively. #ifndef MYWIDGETSTYLE_H. read()) So far my qss file contains this: background-color: blue; font: 57 13pt "Futura"; I read about setting the objectName property to the tag after the Apr 30, 2020 · qApp->setStyleSheet(ts. May 15, 2011 · Style sheets let you perform all kinds of customizations that are difficult or impossible to perform using QPalette alone. Oct 22, 2013 · Sadly, Qt provides no support for importing one stylesheet into another. setFamily("Arial"); font. After a bit of digging it happens that relative paths in the stylesheet are resolved towards the current working dir, and not towards the stylesheet path (which QT cannot know since we Import the Custom Widgets. May 15, 2011 · The frame of the tab widget is styled using the ::pane subcontrol. qss"); How should this path work? If you want to use a relative path then do (I assume the file is next to the executable and that that folder is working directory): Dec 16, 2010 · Qt Centre is a community site devoted to programming in C++ using the Qt framework. The UI is then drawn with the default styling and looks exactly the same as if no QSS file was set in the application at all. The file name is usually passed in the constructor, but it can be set at any time using setFileName (). If you want yellow backgrounds for mandatory fields, red text for potentially destructive push buttons, or fancy check boxes, style sheets are the answer. The . Over 90 percent of questions asked here gets answered. As far as I know, this is not possible with Qt for Python. addSearchPath. addApplicationFont("Resources/Mf Wedding Bells. qss" directly in the . ui file, so the stylesheet would be compiled and used by the widget automatically, and the application wouldn't have to keep the stylesheet file and load it at runtime. Add -> Add File -> and choose your images. setStyleSheet(fh. Then use PyQt's pyrcc tool to convert the Qt resource file into a python module. ReadOnly) self. cpp (mainwindow is the user interface, mainwindow. QFontDatabase. I'm using PyQt5 and Python3. the current directory is not necessarily the one where the exe file is. A QFile may be used by itself or, more conveniently, with a QTextStream or QDataStream. 3), unfortunately, I had to reinstall mysys2 and since then this is not working anymore. ui files. jpg – Jablonski When images are use in the qss code, if the url is relative, QssStylesheetEditor will find the image file in the folder where the qss code file is. Apr 9, 2013 · I found this really good example a bright shiny star of hope and have followed the example to the letter. First, we would use the following application-wide style sheet: *[mandatoryField="true"] { background-color: yellow } This means that every widget whose mandatoryField Qt property is set to true would have a yellow background. qss"); file. For example, to load BreezeDark, first configure using: Jan 8, 2022 · Qt will automatically substitute the key-name "images" with the search-path set using QDir. To set the background color the combination. I have not created a styleSheet file. In this approach we define a Style QML singleton object that contains a collection of properties defining the style. Most commonly, the resource files are embedded Aug 12, 2014 · Yes thats the question, If we can mix stylesheet properties and QFont/QPalette. All derivatives of QAbstractScrollArea, including QTextEdit, and QAbstractItemView (all item view classes), support scrollable backgrounds using background-attachment. show(); return app. Simply use the second line of code to set to the child, and no previous properties will be lost. Lastly, another button can round the corners. I would advise taking a look at this website: Stylesheets. First, we would use the following application-wide style sheet: *[mandatoryField="true"] { background-color: yellow } Jun 13, 2011 · 8. #include "mainwindow. Since 5. open(QFile. answered Jul 27, 2012 at 7:27. what you stated is just incorrect : The reason is, that there is a leading ':' – Supports the :default, :flat, :checked pseudo states. This file should contain something like this : <RCC> <qresource prefix="/images"> <file alias="sunset. This message ends up being printed in the original QTextEdit colour (black), which is invisible after the black background colour in the style sheet is applied. # PySide 2dark_stylesheet=qdarkstyle. Py). qrc) in your project. ui_test = loadUi(UI_PATH, self) Sep 17, 2020 · And I would like to link the qss file "dark. qss" and QTCreator put it into "Other files" directory. QAppSettings import QAppSettings. qss stylesheets as a custom theme. The margin, border-width, and padding properties all default to zero. qss, which is loaded at runtime by my app, and then I call mApp->setStyleSheet (stringLoadedQssFile);. For example: if I want to create buttons, which, when pressed, each modify a single aspect of the stylesheet: One button can insert a margin-left attribute of 10. cpp and a UI file. ui) the following code: Nov 28, 2023 · This module provides a function to load the stylesheets transparently with the right resources file. You can also set the style for all Qt applications by setting the QT_STYLE_OVERRIDE environment variable. Mar 27, 2016 · Method 2: The header file method. I know that PyQt5 can load a . No QSS at all: This shows how much impact the styling has on the startup time. QApplication a (argc, argv); Apr 10, 2013 · What I want is moving the stylesheet to an external . qss file. Prefer Method 1. However, the head of development really wants to separate that my code from his team, so avoid any changes in QT UI file as much as possible, so if something breaks he will know when it was me or him. By default, the subcontrols have positions of a QTabWidget in the QWindowsStyle. qss file is a simple text file. Settings are then propagated down the meta object hierarchy. So all my styles are in file. qss in the debug build location. The resource system is based on tight cooperation between qmake, rcc The animation framework provides an easy way to animate your GUI elements. Am I missing something? I'm using Qt Creator 4. This overview explains the framework's architecture, with When images are use in the qss code, if the url is relative, QssStylesheetEditor will find the image file in the folder where the qss code file is. QFile file(":/Darkeum. ui = Ui_MainWindow / user interface class. pyproject which holds the project settings. qrc文件 This module provides a function to load the stylesheets transparently with the right resources file. Dec 5, 2012 · With this, Qt has no idea where your style sheet comes from. rcc and a folder with all theme icons called theme. If you want a widget with a fixed width, set the min-width and max-width to the same value. /* Header File (mywidgetstyle. read ()) self. #Use this if you only have one json file named "style. I would like to know if it's possible to load stylesheets a lot faster than using my method in a Qt app. open(QFile::ReadOnly); QString StyleSheet = QLatin1String(file. 0. The It is based on the original Calculator Form example. Use a other file to load your stylesheet. In Qt, a style sheet can be applied to a single widget by calling QObject::setStyleSheet () function in C++ code, for example: myPushButton->setStyleSheet ("color : blue"); QFile is an I/O device for reading and writing text and binary files and resources. init (this); QPainter p (this); style ()->drawPrimitive (QStyle::PE_Widget, &opt, &p Dec 16, 2010 · If you want to use an image which is part of your resources, you should have a resource file (*. png : a preview on the result of the style sheets on the interface. answered Jun 13, 2011 at 21:27. It enables you to animate a Qt property value of a widget or QObject. See this open Qt feature request for further discussion. ui file during the initialization of a widget using the uic module. I added a general file named "stylesheet. setStyleSheet(styleSheetStr) well I came up with this code work fine but is this the correct way to load a external stylesheet into PyQt ? sshFile="darkorange. This is useful if your application always needs a certain set of files (icons, translation files, etc. code-block:: python import qdarkstyle Then you can get the stylesheet provided by QDarkStyle for various Qt wrappers as shown below . load_stylesheet This is applicable when using Qt Designer as well. Because Qt is a framework, but not a magicwand, that knows what you want to achieve. qss and resources. So what you must do is replace all the uses of images/xxx in your stylesheet with images:xxx, and everything will work as expected (I know this, because I tested it). setStyleSheet(. Is this the only example "step by step" on how to create, read and write a JSON file in QT? I can't figure out what I might be doing wrong. The Style Sheet example consists of 2 classes: MainWindow inherits QWidget, and is the application's main window defined in Jan 30, 2012 · In my application, the stylesheet for the entire application is taken from a resource file "default. Can I make Qt Designer load up this qss file and use its contents as the master style sheet for any Jul 3, 2013 · 7. In version 2. I have two style-sheet files for both gray and blue color. Then you can get the stylesheet provided by QDarkStyle for various Qt wrappers as shown below. readAll(); application. When I run the application the button is gray, even though the style sheet is applied after the QWidget::show() is called and just before QApplication::exec() , as Right-click on the project file. Sep 30, 2014 · I created a button in Qt and gave it the QSS attribute background-color: gray;, while my external stylesheet has set the QSS attribute of the same button to background-color: blue;. It gives you a hint of what is in. delete ui; } to convert the style sheet into a string but my application toolbar still doesn't change. May 17, 2019 · Sketch New QSS file Writing QSS Loading QSS Realization principle More reference Sketch Styles are commonly used in Qt. background-image : url ( "img/close. Use the Qt Designer Resource System to create a resource file for the images. If you are looking for information about Qt related issue — register and post your question. py, which is different from qtpy, you should install qtpy then set both to the same binding. qss file, adding that file to the program resources and linking it to the . The stylesheet editor can be accessed by right-clicking a widget and selecting Change styleSheet Editing Resources with Qt Designer Using a Designer UI File in Your C++ Application. -stylesheet= stylesheet, sets the application styleSheet. The position of the tab bar is controlled using the ::tab-bar subcontrol. 8 qrainbowstyle. Syntax: @import ""; or @import url (""); For example: @import "commonstylesheet. QAbstractScrollArea. h) */. The content is what is left from the original widget or subcontrol once we have removed the margin, the border, and the padding. close(); } I thought about split the big file, add the small files to the resources Dec 15, 2015 · It is possible to directly modify QSS for each widget in . EDIT2: ok so I figured it out I just did this in my main. This script will generate both dark_teal. Since Qt 4. The most complete customizable stylesheet for Qt application (PySide2, PyQt5, QtPy, Qt. Most widgets are revised and their styles were improved. Hope it helps Oct 7, 2015 · int main(int ac, char **av) { MyApplication app(ac, av); MyWidget widget; QFile File(":/gui/stylesheet. Feb 21, 2019 · So I've created a qrc file and have a file at /stylesheets/main. Aug 16, 2011 · wrote on 16 Aug 2011, 15:40. jpg">sunset. Second (change all selected widget): Use the property window, mark all widget you want to change, click of the of the styleSheetrow. he wants to load font from Qt Resource system . cpp: QFile file(":/style. cpp and many other files. before you were trying to load the stylesheet from a relative path, and the current directory when doing so was not the one where the stylesheet was. exec_ () If you are using Qt. qrc file, press Add -> Add Prefix -> change prefix name if you want. qss" loaded into the application. Apr 27, 2018 · I am trying load a CSS file to the program using qrc. Just create the folder and file on your file system. 13. setStyleSheet (qdarkstyle. You can open the style editor by selecting File > Edit Style Sheet, to select an existing style sheet or design your own style and load it. at(i); and see if "Oswald" appears in the list. The following table lists the Qt widgets that can be customized using style sheets: Widget. Qt -> Qt Resource File -> press Choose -> name your file -> Finish. Another button can make the background colors blue. 6. I have stylesheet information in this main. # PySide dark_stylesheet = qdarkstyle. NB: The python resource module should go in the same directory as your ui files. The Qt Resource Compiler (rcc) #. qss device not open. jpg</file> </qresource> </RCC> Then, you could write this code in the constructor of your QMainWindow: The border is drawn between the margin and the padding. Apr 7, 2023 · Inside the C++ file compiled from the UI file, setStyleSheet gets called again, overwriting the css I'd written. In order to reduce coupling (separate from logical code), we usually define a QSS file, then write the styles of various components (such as QLable, QLineEdit, QPushButton), UTF-8 Dec 5, 2012 · You load the style sheet by yourself. To apply the style just read the qss file using QFile and then setStyleSheet with the content of the file. def __init__(self, parent): QDialog. show app. Jan 28, 2019 · First (change only one widget): Rightclick of the Widget, click "Change Stylesheet" and the Stylesheet window open, when you cange something inside the window you the widget will changed too. With a lot bigger qss styling using this import method You can change stylesheet in Qt in designer or by code. Anyway, you could also name it . qss") ; file. . exec(); } The Qt resource system is a platform-independent mechanism for storing binary files in the application's executable. txt file is required: cmake_minimum_required(VERSION 3. " The resources are stored in the binaries, you can only update them if you rebuild your application. I Oct 13, 2015 · I know I can keep the global file and start adding resource stylesheets or pure code put directly into QT Creator Style Sheet editor for each widget. txt : contains the text of the license which authorizes the use of the file in the respect of the copyrights for the moment it is the license MIT. qss file:. You called QStyle * QApplication::setStyle ( const QString & style ) which requests a QStyle object for style from the QStyleFactory. I have two radio-buttons in my theme window. You can store the stylesheet string in a header file and add it to the source file. Sep 2, 2011 · Appreciate jecjackal for it! As it is said in the Qt's stylesheets reference, applying CSS styles to custom widgets inherited from QWidget requires reimplementing paintEvent () in that way: void CustomWidget::paintEvent (QPaintEvent *) { QStyleOption opt; opt. I put all stylesheet code into only one . PyQt are a set of Python bindings for Qt. My issue is that when I debug there is no /stylesheets/main. I'm reading an external stylesheet, using this code: app. ) and you don't want to run the risk of losing the files. qss"); File. rcc file. As a QML singleton, a common instance can be access from anywhere which imports this directory. Sep 29, 2016 · I have main. Approach 2: Style Singleton. All the styles in a page will "cascade" into a new "virtual" style sheet by the following rules, where number one has the highest priority: Inline style (inside an HTML element) External and internal style sheets (in the head section) Browser default This module provides a function to load the stylesheets transparently with the right resources file. I have an GUI form application, develop on open suse and using QSS. Aug 5, 2017 · I'm using Qt, 5. CommentedOct 5, 2018 at 4:28. To call the file, I write in the mainwindow. readAll()); } For the first one I'm getting : QIODevice::read \dark. The list of files and related metadata is passed to rcc in the form of a Qt Resource Collection File . load_stylesheet (qt_api = os. css"; To indicate to the user that the field is mandatory, one effective (albeit esthetically dubious) solution is to use yellow as the background color for those fields. Oct 15, 2022 · In my QT app I allowed users to load . Use simple format like this: 2. Setting a Stylesheet. Problem is: perfomance really bad. But at run time I get the following error: QIODevice::read (QFile, ":/css/stylesheet. setPointSize(20); Sep 16, 2017 · Then I want to put a huge string literal that contains global stylesheet to project resources and pass it to the method you pointed above. You can use these search-path key-names in any Qt API that takes a path. edited Jul 3, 2013 at 18:49. 1,379 10 19. qss. 2、右击res. readAll()); app. ui file in Qt Designer. # self. A qss file is quite similar to a CSS file, but you need to specify the Widget component and optionally the name of the object: QLabel{background-color:red;}QLabel#title {font-size:20px;} The first style defines a background-color for all QLabel objects in your application, whereas the later one styles the title object only. The value must be a path to a file that contains the Style Sheet. size(); i++) qDebug() << db. Qt just looks relative to the current working directory; in your case relative to the executable. #3. qss, nor does it load it up. qss file called: main. In a form, my QListWidget's Object name is "Good", so it adheres to the #good style. All images and icons were revised, also creating SVG files for all of them. We use global stylesheets that are applied from qsettings on start of the application or on choosing from a settings dialog and clicking a pushbutton. qss and load it into qApp. The problem is when I start application it applies file just once. You will be pleased to know that syntax and style options are the same. "QWidget { color: red }" "QLabel { color: red }" "QGroupBox { color: red }" "QPushButton { color: red }" ); What happens right now is that the cpp file seems to completely override the ui file. After opening your . setStyleSheet(stylesheet); And it's working, the problem now is that I want to change in that file the -License. -style style, is the same as listed above. – Cecil Curry. and pass it to setStyleSheet () app method. import qdarkstyle. Some of you may already be familiar with CSS, and how it can be used in Web and Browser Applications. qrc file as follows: QMainWindow # setup stylesheet app. windows module supports native Windows calls. families(). The second one used to work fine 2 weeks ago (build with msys2, mingw64, qt5. The solution is as simple as undocumented: @. txt it would be the same. here you load the stylesheet from the resource. #define MYWIDGETSTYLE_H. However, when I debug the example, the values of the entries are showing as null. Nov 16, 2020 · Click on "+ New", choose "Qt for Python - Empty" for project type. qrc。. Add the font to the font database in your main: You may want to check the function return value (0 indicates success) and/or the fonts available in the database: QFontDatabase db; for(int i=0; i<db. Appearance of checkable push buttons can be customized using the :open and :closed pseudo-states. # self = QMainWindow class. If I don't use stylesheet, everything goes fine but after I setStyleSheet, application run very slow (Widget I'm starting a new project from scratch and trying to put a few pieces together. Then, in Qt Creator, right click on the project and select Add Existing Files that is not why it was not working before. load_stylesheet_pyside2()# PyQt5dark_stylesheet=qdarkstyle Aug 14, 2017 · stylesheet in form file. Apr 15, 2018 · 1、在qt左侧目录树的顶层文件夹上右击->添加新文件->选择QT->QT resource file->choose，输入自定义资源文件的名字res->选择资源文件的存放路径->下一步->ok，这样就可以在目录树中看到一个文件 res. The application consists of one source file, main. stylesheet" fh = open (sshFile,"r") qstr = QtCore. // inside m_ui->setupUi, in auto-generated class. qrc in Qt Designer, you should then convert it like this: Oct 12, 2021 · I'm working with QTCreator. Does Qt allow to move "hardcoded" strings to resources? I think that the best practise for qt stylesheet is to use a ressource file on the qt ressource file named stylesheet. setStyleSheet (…. In qss file use variable names: background-color: @myColor; min-width: @myWidth; 3. readAll()); qApp->setStyleSheet(StyleSheet); file. This also means, that a relative path to the images makes no sense. Preview From version v0. Then you can get stylesheet provided by QDarkStyle for various Qt wrappers as shown below. Your stylesheet doesn't work for two reasons: the width (and height) properties generally don't apply to widgets, but only to subcontrols, as explained in the docs: Warning: Unless otherwise specified, this property has no effect when set on widgets. I have not created resources files. When I check any button it should apply all over application as shown in main. jpg works, but "G:\\2\\qt. Note that the empty string. Note. #1. This looks like this: The modules for Qt are imported. And in the "Edit Style Sheet" Menu I see the option to select the dark. 14. Nov 12, 2013 · When the program starts it applies the style sheet and shortly afterwards a hard-coded test message is sent to the console window showing the date and time of the last compile. qss Aug 16, 2012 · Using Qt stylesheet and performance issue. Jan 17, 2018 · 10. and for the second one Unable to set stylesheet, file not found. Select the folder above your source folder for "Create in", and provide the name of your source folder as the project name. Qt Designer, meanwhile, doesn't know about file. json" inside the root directory, "json" directory or "jsonstyles" folder. 6 and later, a restructure stylesheet is provided. – The compiled resource Python file now contains all the stylesheet data. Oct 3, 2016 · In general, I load all my ui files via the loadui() method, and this works fine for me. 16) Jun 1, 2017 · 1. I'm trying to change the styleSheet properties after my program started, so the user can customize the appearance of the program. We also provide a command line (script) to get info that could be used when opening issues. Go to mainwindow. Example: style_file. QString(open(styleFile,"r"). open(QFile::ReadOnly); QString StyleSheet = QLatin1String(File. png" ); /* the img folder must be in the same directory of the qss code file*/ Dec 30, 2017 · wrote on 29 Dec 2017, 17:58. So if you created the resource file App/resources. To load and set the stylesheet in a PyQt5 application, import that file, load the contents using QFile and read the data. ui file in the QT designer, "Edit Style Sheet" Menu. Instead, you should call void QApplication::setStyleSheet ( const QString & sheet ) which sets the application style sheet. The files generated can be integrated into a PySide6 application just with: Jan 2, 2017 · Empty QSS: Using a empty QSS file (removing all the styling information) results in a startup time reduction of about 4 seconds. The padding falls inside the border, between the border and the actual contents. The palette has only 9 colors. setStyleSheet(StyleSheet); widget. The qss file is compatible with all Qt applications (Qt4, Qt5, Py Side, Py Side2, Qt4 Py, Qt5 Py, Qt Py, PyQtGraph). But if you want to load QSS from your files - you should implement your own logic. This feature able to use qt-material themes into Qt implementations using only local files. You are absolutely right about escaping, but in qss need to use G:/2/qt. Create a text file with definitions of variables. QString (fh. qss"): device not open I am using CMake, here is my project's structure: Nov 7, 2011 · Yeah, Qt Creator (I'm assuming that is what you are using) is a little lacking in this area. My personal preference of styling when the widget must be changed by code is setting the constant values in Qt Designer to the parent with the corresponding widget type tags and object name tags. void Utilities::loadEnglishStyle() { QFile file(":/EnglishClasses. My goal here is to have a qss file I can work out of and potentially hot reload over time. The Style Sheet example shows how widgets can be styled using Qt Style Sheets. png" ); /* the img folder must be in the same directory of the qss code file*/ Sep 30, 2014 · @RetiredNinja Please note: in qss G:/2/qt. cpp file and use the images from your . Here my codes: this->setStyleSheet("background-color : black;"); Took 270 ms to execute this simple css/qss styling. qss file content in a QString object. Using QT Creator 3 Jan 15, 2015 · UPDATE 1: Based on Ekhumoro answer: I can use the custom font downloaded by adding it to the font database before loading the Stylesheet: QtGui. It turns out this is very easy to implement using Qt Style Sheets. 9, Windows. Load the JSon files. The Resource Compiler (rcc) command line tool reads resource files and generates either a C++ or Python source file, or an . QFile expects the file separator to be '/' regardless of operating system. For QPushButton with a menu, the menu indicator is styled using the ::menu-indicator subcontrol. importqdarkstyle. We have set the background color of a single widget in one of the dialogs' form files to white. This also allows you to use CSS related tutorials and resources to supplement your learning. code-block:: python # PySide dark_stylesheet = qdarkstyle. -template. Jul 23, 2021 · @ekato993 said in setStyleSheet via . Supports the box model. read()) self. 1. Jan 10, 2013 · I am loading my Big file by calling function on main I have created. qss for example, As you can see, both of them contain a selector and a declaration block. The calculatorform. Most of the features offered by the framework are also available in Qt Quick, where it's possible to define animations in a declarative way. By default, rcc will generate C++ source code that is then compiled as part Apr 19, 2017 · setStyleSheet (text); } MainWindow::~ MainWindow () {. pedrotech. from Custom_Widgets import * from Custom_Widgets. This is a variant of Dirk Eddelbuettel's solution but makes use of the function specifically for the background. During runtime, I have a case where I want to "SetObjectName" it to "Bad" and have the style changed instantly in the UI. How to Style. You can set Jun 22, 2015 · Please read the question carefully . load_stylesheet_pyside() # PySide 2 dark_stylesheet 9. setPaletteBackgroundColor(Qt::black); setAutoFillBackground(true); in the QWidget derived class worked for me. open(QFile::ReadOnly); QString stylesheet = file. If you want to load a qss file and set a stylesheet to a widget, you only have to read file and put the read content in the stylesheet and it will work (the file have to be in the correct format of course). Now we have the problem that the style that was set in the form file will 0. Use it if your application always needs a certain set of files (like icons, translation files, images), and you don't want to use system-specific means to package and locate these resources. ttf") After that, I can simply use the font name that I have just added in the stylesheet like this: QLabel. If you want to apply a style sheet to your application, you have to load the . which provides access to files through the prefix ":/" . Each declaration contains a property and a value, separated by a colon. First, start importing our module. ui") UI_PATH. ui file designed with Qt Designer is shown below: When using CMake to build the executable, a CMakeLists. For this we can use CSS Stylesheets in PyQt6, also known as QSS Stylesheets. 15, the icon property can be set to override the button icon. pn rd ys qb bw mc je dz xi ab