Qwidget set background image png. QBackingStore *QWidget:: backingStore const.

PyQt: 5. Free, quick, and very powerful. To that new file via right click and Add existing file you add your bg image. Regards, James The background role defines the brush from the widget's palette that is used to render the background. jpg); border: 5px solid rgba (3, 5, 28, 1);}"; setStyleSheet (qwidgetStyle); Here, you just told Qt to apply qwidgetstyle to every QWidget of your application, with the keyword QWidget. Center image: set widget background image, try to set headerview and tablecornerbutton background image but without effect. To be more precise I could have used: QWidget#idName { border: 1px solid grey; } or. If the widget is named scrollAreaContents, then it should be #scrollAreaContents { background-color:transparent; }. QAbstractScrollArea. QScrollArea provides a scrolling view around another widget. tile variable contains the actual pixmap image which if referenced within the paint variable itself. #define QBACKGROUNDIMAGE_H. firstly why PySide6 still supports the qrc system and PyQt6 does not. The png source is here: DMX_Led. Mar 26, 2020 · In order to set a background image we will use setStyleSheet() method. QtGui import QImage, QPalette, QBrush. Now the MainWindow also contains a QTabWiget and I am trying to set images in the background of these QTabWidget pages. set your MainWindow palette to the palette you created. Here's an example of how you can use the setStyleSheet method to set a background image for a QLabel widget: Jun 3, 2011 · 1. QBackingStore *QWidget:: backingStore const. No change is happening :( But, i could make change to all the properties of all the other widgets except this centralWidget. The following table lists the Qt widgets that can be customized using style sheets: Widget. rectangle returns the drawn image, it does not modify the input array. Aug 16, 2016 · you have set the colors from style sheets which i don't recommend at all or maybe you have set the parents stylesheet. Returns the QBackingStore this widget will be drawn Oct 10, 2012 · what sherpyas code didnt explain (which actually helped me understand the paintEvent) was that self. The setStyleSheet method takes a string containing CSS style sheet rules as an argument. . __init__(self, parent=parent) def paintEvent(self, event): painter = QPainter(self) Basic Drawing Example. Oct 31, 2013 · The widget loads a PNG then draws it on the paint event. The frame style is specified by a frame shape and a shadow style that is used to visually separate the frame from surrounding widgets. I also need the background to resize on MainWindow resize. only a blank application. 7. "Lay Out in a Grid"). tabWidget. In the last reply it was suggested the use of the following code: Hey fellas, I've tried to change the background image of a QWidget, so I simply subclass-ed QWidget, and call this->setStyleSheet("QWidget {background-image: url(c:/mybackground. I'm trying to resize a background image on a button. MainWindow with a single QLabel added. Sep 4, 2019 · I am attempting to create a custom QWidget (from PyQt5) whose background colour can change. Current code (not working) Jul 25, 2014 · i created a qt resource file and put the image in there. QLabel is typically used for displaying text, but it can also display an image. The class can draw everything from simple lines to complex shapes like pies and chords. Codeblock has messed up the indentation. If you want to use an arbitrary background color, you need to modify the widget's palette instead: p = w. png); } Also tried removing the ":" in background, but doesn't make a difference. You have to set the flat attribute to true: button1->setFlat(true); You also have to set the autofillbackground -. This is the problem for OSX. Normally you would add a qresource file. And can I set a background image for the specific tab of the QTabWIdget? c++; qt; qt-creator; Share. tile= QPixmap("bookshelf. from PyQt5 import QtCore, QtGui, QtWidgets as Q. ui->centralWidget->setStyleSheet(". what's i'm facing is that the window's background pic doesn't take the size of the window when maximized and the picture for the qframe doesn't appear at Jul 9, 2014 · In particular I observe that the attribute WA_StyledBackground must be set to show a border or a background image while a background color is set independently. Jun 14, 2017 · However, when I add background-image: to the styleSheet tab on Qt creator, the result is that all the pages of the stacked widget get that background image. Here the image gets stretched for the screen but a button with another image is loaded along with the Main screen image: When i try to change background color and image using change the stylesheet option in qt designer using selector. Ideally in the designer, but I think it cannot be done in the designer, so via code would be ok too. Created with love by team Browserling. In CSS3 I saw a "background-size : contain" property but I fear it doesn't work in Qt 4. You need to resize the QLabel to be able to see the entire image. btn. Sep 1, 2020 · Set the background-image using a QStyleSheet. Add the file to your resources. Create a QPalette and set its QBrush with your QPixmap and its ColorRole to QPalette::Window. png)”;) Argument : It takes string as argument. 5. It should work. Select the border widget. Next, with the Label selected, look in the right hand QLabel properties panel for the pixmap property (scroll down to the blue region). Dec 8, 2015 · Is it possible to assign an alpha-transparent mask to a QWidget? I know how to set a mask using setMask but it seems it only supports black&white masks. Couldn't find a way to make the image fit Oct 6, 2012 · The reference to QMainWindow causes the background of main window images to be affected by the style sheet. We set this palette on the QWidget using setPalette, and we also set the autoFillBackground property to true so that the widget will automatically fill its background with the palette. shape bytes_per_line = ch * w convert_to_Qt_format = QtGui. By default, a QWidget doesn't fill its background. I'm working with Qt 4. If your "FenPrincipale" widget derives from some other class, replace QMainWindow with the class it derives from. To create a Qt Resource File, go to the menus: File > Qt > Qt Resource File. Format_RGB888) p = convert_to_Qt_format. Returns the QBackingStore this widget will be drawn Aug 8, 2019 · Solution. Since the border-image property provides an alternate background, it is not required to specify a background-image when border-image is specified. This happens only for MainWindow, for all pop-up windows etc. The problem is the image is High res , and only the upper left part of it is showing , I can't get it to scale down to fit. I would suggest you to change this line in your code. png);"); Where pixmap. png to there, then clicked on add resource -> background-image and picked img. Select the border widget and set it's layout (e. Supports the box model. the url needs fixing: no quotes nor 'r'; simply the file name (maybe the space in the file name needs escaping, you could try to play with it) This, for instance, works: import sys. i. QMainWindow window; window. 7 , I set a QWidget's background-image CSS an image from my qrc. png? for the resource file i've found that i can create it by adding it to the project directly by file|new file but how ill specify the resource file if it is added to the current project? for setting the icon application icon i don Apr 18, 2018 · You need to call setAutoFillBackground(True) on the widget. Then refer to it in your stylesheet: background-image: url(:/Style/img. setStyleSheet('QTextEdit{background-image:url("yaratici. I am trying to set an image as the background on the ListWidget just like I would set a background-color to a color. Here is the sample widget code, i hope it helps. png) }"); in the initializaiton function. setStyleSheet (“background-image : url (image. Mar 29, 2016 · Hello everyone, I am relatively new to Qt Creator C++, and I would like to create a windows program (just a QWidget window) where the background is constantly moving from right to left. Aug 8, 2018 · @S. from PyQt5 import QtWidgets, QtCore. After, in your window/widget constructor, load the image to a pixmap so it's stored for other uses (like setting the background) //scaling the image, optional. i tried these things based on what I found online, but none worked: self . If your layout is not empty, one solution is to encapsulate the contents in a widget, then you can use stylesheet on it. IconSizeSpinBox is a subclass of QSpinBox that lets the user enter icon sizes (e. Code : Output : May 17, 2019 · I am trying to add an image to QListWidget which does not have a setpixmap() method as suggested in the example. You can use (kind of) CSS in the stylesheet, so use the 'power' of CSS! ;-) Edit: @QPushButton {background Jun 20, 2017 · 1. png. 3. setting the alpha transparency to background as follow works to the extent the main widget's colour is transparent at 50%. png</file>. label. fromUtf8. rectangle method and then converting you use a 3-channel format in QImage. #include <QtGui/QMainWindow>. May 27, 2020 · you need to use setStyleSheet at some point. png string with the actual path to your image file. If I replace ex = Model_GUI(app)with ex = graph(), I have the correct expectation : I don't understand why the image is correctly set when I'm using the QWidget alone but it isn't set right when I embedded it in a QMainWindow? May 4, 2012 · Regarding rounded corners, QWidget::setMask() will help you. How to set it if there is a parent form? f = new QFrame( this); f ->setFixedSize( 400, 400) setStyleSheet("QFrame {border-image:url(back. See also setBackgroundRole() and foregroundRole(). Apr 4, 2015 · If you want to write a 2D game, using Qt - take a look at QPainter class. button1->setAutoFillBackground(true); You may want to look at QToolButton which doesn't require it to be flat in order to render an image. QPainter performs low-level painting on widgets and other paint devices. Is it possible to set images as backgrounds of other widgets, not only windows ? Jun 14, 2013 · 15. Aug 2, 2011 · As others said, you should first create a resource file and then add the image to that resource file. Apr 9, 2021 · Setting the background color on the tree is a bit different, and it depends on the system/style in use: you could set the background for TreeWidget (your class) in the stylesheet, but that could create some issues in certain cases, most importantly for the checkboxes background. ) notice the ":/". Is there a way to set a different background image to each page with out using QT's styleSheet Method Aug 15, 2015 · You can add a background image to your MainWindow by doing the following: Create a QPixmap and give it the path to your image. png); I made a new . Header file. png will be located in the resource file under the images prefix. One of the configuration options allows the user to set the background color of all buttons. setFont(QFont('Aurebesh_english', 32, QFont. See the documentation for more options. It can also draw aligned text and pixmaps. I need also to adapt the size of the image to the size of the button. screenGeometry(0) # returns QRect, 0 = main screen. This is the code I'm currently using: NavigationBar::NavigationBar(QWidget *parent) : XQWidget(parent) {. The problem is that the shadow is all black and is not alpha-transparent. It turns out this is very easy to implement using Qt Style Sheets. Jan 6, 2017 · Left image: set widget, headerview and tablecornerbutton background color works. The image consists of an icon on a transparent background where the icon is colored (Play=green, Pause=yellow, Stop=red) for when a given state is Feb 16, 2016 · The code with setPalette works well with my MainWindow. png than E:\image\fon. An alternative is to change the palette for the Base role, which . So my question is, how can I add a nice gradient to my QWidgets / QFrames without slowing down the program? Using only the designer. png") Viewed 2k times. but when I execute it I don't have the image in the QWidget (in the middle). I write a small sample of my code : import os import sys import numpy as np from PyQt5 May 26, 2020 · 3. QtWidgets import QApplication, QWidget, QLabel, QMainWindow, QPushButton, QAction. The QPixmap is centered on the QLabel, but the problem is that the QLabel is not centered with respect to the window. currently I have a PNG like this: and a widget like this: If I load my PNG in a QPixmap and set it as a mask, I get this (notice the Dec 19, 2015 · Ok, I finally got a completely working example with use of setMask. and draw the pixmap there. your color role in the palette doesnt match. On the other hand cv2. jpg" in the current directory (or you can just edit the default path in the loadImage method). using. but when i run the application it doesnt show the image. png); } By defining a default texture all background colour you set becomes hidden behind this texture. First, we would use the following application-wide style sheet: *[mandatoryField="true"] { background-color: yellow } Jul 23, 2021 · I have a question about the resource system in PyQt6 and PySide6. data, w, h, bytes_per_line, QtGui. Bold)) # return current screen resolution. Oct 20, 2021 · 2. QWidget setting background image method: Use QPaltette. imagine if i put the icon directory is in the same directory in which my project is, how will specify the path. If your layout is empty, add en empty widget to it, then you can use stylesheet (or add a Oct 11, 2023 · Here is the sample code to draw a semi-transport Widget using QT libraryin c++. red) Dec 11, 2013 · I get a small white frame around the background. directory images can do it like this /images/icon. jpg) }"); Important: Note the dot before QWidget. QtCore import QSize. To set a background image in PyQt5, you can use the setStyleSheet method of the widget to which you want to set the background image. Mar 20, 2020 · I'm trying to set background picture for the window and give it full window size even when i maximize it and i have a qframe in which I'm trying to set another picture as background for it. Action performed Add background image to a label. Note that this method uses QWidget parent to 0 to the time, that is, there is no parent window. Feb 12, 2019 · The application has 2 windows. eyllanesc. Jan 21, 2013 · Yes, my apologies. World's simplest online Portable Network Graphics transparency maker. COLOR_BGR2RGB) h, w, ch = rgb_image. Input PNG (click on a color!) Apr 20, 2010 · 8. secondly how to use an image as a background for a widget in PyQt6, I saw the notion of addSearchPath(), and setSearchPath() but I didn't understand how to use it and it didn't work. as an example you can add this lines to the constructor of Jun 12, 2015 · There are many ways to set the background color to window, I will give you one simple technique. Sep 21, 2022 · I would need to put a background image, stretched as background of the first tab of my QTabWidget. Set your MainWindow palette to the palette you just created. This can be changed using the background-clip property. May 1, 2011 · 4. Nick I recommend you explain your solution, a response that does not indicate anything smells like it is not quality, try it is not an answer that a user of your reputation can provide, read How to Answer:) for example, you should indicate why it is better to use E:/image/fon. Clarification - I use. argv) # create invisble widget. backgroundPixmap_ = new QPixmap(); Jan 11, 2017 · 5. You can specify a background for the widget using the background-image property. For more information, see the documentation for the setAutoFillBackground property. ui designer file when i put it in the stylesheet. png – Feb 5, 2013 · QWidget { background-image: url(:/texture. answered Sep 1, 2020 at 20:02. Because it is not the main window, but it is ًWidget so the picture was not visible in the background and one of the Widgets has been set to the mainWindow so it work correctly and The code for solution: import sys. Format. Note: Unlike WA_OpaquePaintEvent, newly exposed areas are never filled with the background (e. setStyleSheet (" background-image: url ( :/test. I found the perfect picture on the internet to illustrate what I mean: Jan 25, 2021 · There are two problems: there is a typo in the second line, as you added a ;} at the end of the background, which makes the stylesheet invalid;; using the "*" universal selector (which is almost the same as using QWidget) means that all widgets will use the properties declared for it, and since you're probably setting the stylesheet on a QMainWindow (which inherits from QWidget), the image Apr 24, 2013 · Is it possible to stretch the background image. One thing is MainWindow, for which a png image is set as the background through QtStyleSheet. editor. 4. png );") self Aug 19, 2014 · From the doc I sent above: [quote]A background-image does not scale with the size of the widget. How to make QWidget background with specified png file? 13. In the class itself, the attributes Qt::WA_TranslucentBackground and Qt::FramelessWindowHint. Syntax : label. These properties can be set together using the setFrameStyle Mar 16, 2021 · 10. EDIT: In response to another question below in the comments, here is a working example that uses an image in a resources file, and that overrides QWidget::paintEvent(): Apr 4, 2016 · Hey fellas, I've tried to change the background image of a QWidget, so I simply subclass-ed QWidget, and call this->setStyleSheet("QWidget {background-image: url(c:/mybackground. qrc file, which is located in your project source folder , in a way like: <file>your_image. not sure it will load it. The Basic Drawing example shows how to display basic graphics primitives in a variety of styles using the QPainter class. QImage("space. ui->centralWidget->setStyleSheet("background-image:url(:image. May 18, 2016 · The behavior you encountered is perfectly normal, because of the following lines : QString qwidgetStyle = "QWidget {background-image: url (background. Select the frame widget and set it's layout (e. My english isn't perfect, so I didn't understand if your layout is empty or not. Still didn't work. If the child widget exceeds the size of the frame, QScrollArea automatically provides scroll bars. png)")@ To rapidly update custom widgets with simple background colors, such as real-time plotting or graphing widgets, it is better to define a suitable background color (using setBackgroundRole() with the Window role), set the autoFillBackground property, and only implement the necessary drawing functionality in the widget’s paintEvent(). I have found here some way to do that, but nothing seems to work. The styles for the controls work but not when I'm trying to load a background image for the MainWindow. except AttributeError: def _fromUtf8(s): May 7, 2018 · The example also requires an image file named "image. Borders have to be set again Oct 21, 2010 · and if you just want the background on a particular widget use: @myWidget->setStyleSheet("background-image: url(. The main problem is that your image has extra space at the border. qrc file, added img. I tried: QMainWindow{ background-image:url(:image_256_8bit_latest_back. 2. Using the Palette. QImage(rgb_image. I tried to change a color of my PNG image after set its color by QtWidgets. I tried with setPalette and setStyleSheet, but none seemt work. #ifndef QBACKGROUNDIMAGE_H. QLayout can't have a stylesheet. Sep 24, 2017 · 1. All derivatives of QAbstractScrollArea, including QTextEdit, and QAbstractItemView (all item view classes), support scrollable backgrounds using background-attachment. @QWidget {background-image: url(:/logo/MMbgTest4. The second is QWidget, which serves to configure the application. You are pointing to c:. In contrast for the other widgets this attribute has no influence, a border or background image is always shown. setWindowFlags(Qt::Window | Qt::FramelessWindowHint Jun 22, 2012 · background image is a gradient , 16bit 1x800 px png. self. Add your image to resources (. How do I make those retain there own stylesheets. it works just fine. The Icons example consists of four classes: MainWindow inherits QMainWindow and is the main application window. Apr 5, 2011 · At the first you should convert your opencv image to qpixlemap format with this code : def convert_cv_qt(self, cv_img): rgb_image = cv. and select an image file to insert. New->Qt->Qt resource file. A background Feb 4, 2020 · From the property editor dropdown select "Choose File…". If you want to use an image file that's stored as a 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. background-size: 10px auto; but pyqt seems to be missing this CSS attribute. It is written for PyQt5, but the code will be 99% identical for PySide2. setAttribute (QtCore. AlignCenter) answered Jan 19, 2020 at 15:50. However, all the standard methods of setting the background colour do not seem to work for a custom QWidget class. g. , after showing a window for the first time Dec 16, 2010 · I'm running my Qt app through command line with a parameter -stylesheet. As @Felipe mentioned you can use window. setColor(w. Oct 27, 2015 · I need to resize the image to cover the app, atm I have a window 300x200 and background image 2400x1800. ---> to. with Python. e Override, the paintEvent of the QWidget. The solution is to remove the default texture from QWidget or load a new texture with the colour you need. png);" "background-repeat: no-repeat;"); tried it with. qss file works. Note that you'll need to replace the :/path/to/image. cvtColor(cv_img, cv. So you should center the widget by changing to: layout. #centralWidget {background: rgba(32, 80, 96, 100); border-image: url(:/images/login My QLabel (self. EDIT To do it programatically: //names starting with : means that they are on a resource file, //otherwise in the filesystem. setStyleSheet("background-image: url(:/images/pixmap. You can use background-repeat and background-origin to control the repetition and origin of the background image. If you're using Qt Creator, you should be aware that it builds the target binary in a separate directory (usually with a name like build-yourprojectname-qtversion-Debug or so). The first example demonstrates how to change the background color using QPalette Jul 1, 2015 · I need to put an image from the internal resources as a background image of a QPushButton. addWidget(label_img, alignment=Qt. from PyQt5. This makes the context menus black on the widget. If no explicit background role is set, the widget inherits its parent widget's background role. background-image: url (:/bg. Just import your PNG image in the editor on the left and you will instantly get a transparent PNG on the right. The example shows how to combine QLabel and QScrollArea to display an image. QImage. So far I have attempted to change the colour through QSS stylesheet and by setting the palette. from PyQt4 import QtCore, QtGui. If you do not have much experience with PySide/PyQt, I would recommend that you work through this tutorial. To provide a "skin" or background that scales along with the widget size, one must use border-image. setFrameStyle(QFrame::NoFrame); The QFrame class can also be used directly for creating simple placeholder frames without any contents. Oct 28, 2018 · I have gone through this link: How to Change the Background Color of QWidget and have incorporated changes like given but im unable to set color to childCustomWidget. IconPreviewArea is a custom widget that displays all combinations of states and modes for a given icon. By default, the background-image is drawn only for the area inside the border. Aug 7, 2015 · The main issue I am having is when I make the image as background using the stylesheet for 'Form' it carries over as the background for the list widget and text edit widget as well. png)}" ); A new QFrame comes out, just change the QFrame Oct 30, 2011 · Drag and drop the text widget onto the border widget. Here is what i wrote. app = QtWidgets. Is there any other way of scaling the background image on the button? Aug 27, 2013 · I wanted to be able to set the the background to all screens in my application and the following added to the . i know the URL of the image is correct because the image shows in the . WA_TranslucentBackground) here is a little example: import sys. The CSS on the contents widget (the second line) should be constrained to that widget only by using its ID (from the objectName property). setStyleSheet("background-image: url(:/AddButton. qrc file) of your application. Is it possible to make it support a true alpha channel? i. create a QPalette and set it's QBrush with your pixmap and it's ColorRole to QPalette::Background. As you can see, the image is inserted, but the image is kept at its original size, cropped to the boundaries of the QLabel box. OS: Windows 7-10 (not a choise) Python: 3. The background role defines the brush from the widget's palette that is used to render the background. If I don't do this, there is a white rectangle 5 pixels from the border of the image that I 3. From the property editor dropdown select "Choose File…". e. At first glance css property background-size is not supported, border-image would strech the image. Right image: set widget background image, set headerview and tablecornerbutton background color to transparent. QWidget is the base class of all user interface objects which means that the same approaches for changing the background color can be used with them too. My custom widgets with the above approaches look like this: Here orange is the parent's BG color which I am able to set. I tried with the followings: 1). Actually I have a image of size 320X480, I want to use this image as background for a QWidget screen with size 360X640. shape[0], cv_img. try: _fromUtf8 = QtCore. QString. For example, if you want to have one widget representing your game window you should inherit it from a QWidget or it's subclass and reimplement paintEvent(QPaintEvent *event) function to perform your drawing. Jul 27, 2012 · widget->setAttribute(Qt::WA_NoSystemBackground); Qt documentation : Indicates that the widget has no background, i. Qt. However, three of the buttons (Play, Pause & Stop) are unique as they also display a corresponding image. I've tried to make it work via Qpalette () and it works better but I don't know how to make the background image stretched =/ : image = QtGui. Apr 4, 2016 · What is wrong is most likely the path "c:/". You can add a background image to your MainWindow by doing the following: create a QPixmap and give it the path to your image. then syntax is then. jpg);}@ Thanks for your help. screen_size = QDesktopWidget(). Hey fellas, I've tried to change the background image of a QWidget, so I simply subclass-ed QWidget, and call this->setStyleSheet("QWidget {background-image: url(c:/mybackground. when the widget receives paint events, the background is not automatically repainted. jpg)"); to. Apr 22, 2016 · I cannot believe that some basic features like setting an background image is not supported in PyQt5 and appearantly I'm not the only one : StackOverFlow. You could also assign the stylesheet for every button. Go to the Layout section in the Property Editor. Both ways are failed, this is why I asked, and point 2 gave additional context. You could also use one stylesheet and declare myButton in the stylesheet and do some specific styling for this element only. Oct 24, 2013 · of course not, the method 1 is not correct, so I tried to use method 2. @ QMainWindow::centralWidget ()->layout ()->setContentsMargins (0,0,0,0); @. If you are going to use transparencies then the colors and the image must be 4-channel, in your case you are passing a 3-channel color to the cv2. Box { border: 1px solid grey; } The latter is easier, in my opinion, as it doesn't require the use of id names. png); ( with rest as is. Example code: Image Viewer Example. label2) does not show, I believe it is under the QPixmap background image. Probably the image file is not to be found where the program expects. QColorDialog. Overriding the paintEvent method is also a possibility. QWidget() Mar 1, 2014 · From Qt Style Sheets Reference:. , "48 x 48"). png") will draw the image the background of the widget/window where the stylesheet creates errors! List of Stylable Widgets. it seems nothing has happened. jpeg");}') You may have to provide absolute path to the image file. To change the background image of a QWidget you should override the paintEvent method, in your case yours in a QStackedWidget, we create a class that inherits from this: class StackedWidget(QStackedWidget): def __init__(self, parent=None): QStackedWidget. How to Style. Aug 28, 2011 · Background image or transparency from Style Sheet does not show on QWidget. palette() p. QWidget { background-image:url(:image. scaled(cv_img. For more details check the Qt stylesheet examples. /image. Nevertheless, when I apply my code the result is : It change the background of my PNG image. make sure the palette is set for widget and i dont recommend to set palette for every widget unless you really wanted to, you should set the palette for your application Feb 14, 2024 · Drag this onto the QMainWindow to add it. to remove the border. But the canvas of the window is black, and therefore the MainWindow ()'s background appears grey. Mar 21, 2013 · You can also set the background image with the stylesheet. shape[1 Apr 4, 2016 · Hey fellas, I've tried to change the background image of a QWidget, so I simply subclass-ed QWidget, and call this->setStyleSheet("QWidget {background-image: url(c:/mybackground. Jul 23, 2013 · Use the setStylesheet method of QWidget. It means style the QWidget, but exclude the subclasses. QApplication(sys. Import a PNG – get a transparent PNG. If no explicit background role is set, the widget inherts its parent widget's background role. window = QtWidgets. backgroundRole(), Qt. qw ii pc qp nk xu nd ur ot ds