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Qlabel image fit



Qlabel image fit. Now it follows the Dialog. If the child widget exceeds the size of the frame, QScrollArea automatically provides scroll bars. & save it as ui_main. The image is set as the label's pixmap and the adjustSize method is called to resize the label to fit the image. setBrush(QPalette::Window, QBrush(pic)); this->setPalette(palette); Now the image is rendered on the QLabel, but this is not what I desired. Oct 29, 2015 · 1. If a svg is specified, the image is scaled to the size of the contents rectangle. If the font metrics returns a height of 16 pixels, adding an embedded image that has a 16 pixel height should not change the label hint. . Alternatively, check if image needs to be re-scaled before doing it in paint event. margin : int This property holds the width of the margin. " value = 3 # <--- raise or lower value to see adjustments. QPoint(0,0) Detailed Description. kevin32 @Guest. Learn more about Teams Dec 9, 2021 · The image size is based on the font metrics, so it should technically fit the minimum size hint of the label. you use the size of its pixmap, which in turn remains constant. As the label resizes so does the pixmap. Thats why I use graphics view to list in listWidget. counter=0; ui->setupUi(this); Jan 28, 2020 · It crops the image and it shows some pixels (as expected). I used the Image Viewer Example for zooming functionality - so I have a class inheriting QScrollArea, capable of showing an image, in a QLabel, and zooming in/out/fit with specific limits. There it seems that the pixmap is once converted to a QImage and scaled to the window size, and then converted again to a QPixmap. More specifically, this is what I have. It is possible to use setScaledContents to make QLabel scale the pixmap and allow for resizing. @mrjj said in How to make a resizable image: Feb 14, 2024 · Drag this onto the QMainWindow to add it. I have created a preview that shows a rendered image. setSize(800,600); // Change size to 800X600 The QLabel class allows you to create a label widget that displays text, an image, or an animated image (GIF). setPixmap, the resulting QLabel will have a fixed size equal to the size of the pixmap. Or finally, use a member or static var and track sizes and only recalculate sizing as things don't fit. #ifndef MAINWINDOW_H #define MAINWINDOW_H #include <QMainWindow> #include <QLabel> class MainWindow : public QMainWindow { Q_OBJECT public: MainWindow(QWidget *parent = 0); ~MainWindow(); private: QLabel m_QLabel_choose_interval; }; #endif // MAINWINDOW_H Oct 26, 2017 · Pyqt5: QLabel displayed larger than its size () I have a QLabel on which I set a QImage using QPixmap. The visual appearance of the label can be configured in various ways, and it can be used for specifying a focus mnemonic key for another widget. resized screen Mar 27, 2023 · Drag this onto the QMainWindow to add it. The PyQt5. And then we press Ctrl + s, according to the function set by my shortcut key, I will use ImageQt in PIL to Aug 30, 2019 · Set QLabel backgroundLabel image using stylesheet. I've been trying to set an image to a QLabel from a URL. mainwindow. To avoid that, you could just set an arbitrary minimum size: def showDotPlot(self): dotPng = QPixmap('big1. This code works okay in resizing the image, but the label doesn't cover the whole window, I have those "borders". If i will QTimer then it is increase font size correctly, but it is add flick. QLabel doesn't have a setIcon method, but it has setPixmap. But if you use that to set a QPixmap it overrides your text. In order to achieve the desired effect, I would suggest you to: Explicitly set the widgetResizable property to false: ui->scrollArea->setWidgetResizable(false); May 1, 2011 · Teams. Also, the scaling reduces the images further down, instead of Jun 15, 2021 · PYQT5: Prevent image label changing window size. Apr 10, 2013 · 7. h". label. from PyQt5. size() painter = QtGui. we should first create a resource file and then add the image to that resource file. A QLabel can contain any of the following content types: Jan 1, 2014 · I would call that only after the person had chosen a size, or maybe less often during the resizing. Use Use QPixmap::QPixmap ( const QString & fileName, const char * format = 0, Qt::ImageConversionFlags flags = Qt::AutoColor ); QLabel::setPixmap ( const QPixmap & ); Image Viewer Example. From the property editor dropdown select "Choose File". I wanted use Qwidget::setFont and QFont for increasing size of font. However, the images are displayed on the left side of the label instead of the centre. we can set the image of the QLabel using Qt Creator Dec 16, 2016 · I am write a paint program. May 2, 2013 · Resize the BufferedImage. I'm going to read the ressources! Many thanks again – Nov 4, 2022 · Get the size hint of the QLabel using the sizeHint () method and then use the result when you resize your window. Oct 24, 2019 · set the SizePolcy of either width or height to fixed. PreserveAspectFit } I don't want to use QML due to its ties with JavaScript. and select an image file to insert. May 31, 2015 · 2. Code Review. h. I want it to expand proportionately if/as the user grows the window. pix = QPixmap(600,500); // set size to 600X500 How to change size after this? Someting like: pix. Look into the below content in the link provided. from qt_ilk import loadUi_example. setPointSize ( 20 ); f. QBitmap is only a convenience class that inherits QPixmap, ensuring a depth of 1. Sorted by: 1. using this command we cannot change font size dynamically. Mar 4, 2013 · QLabel load image, adjust size. I'm trying to use QBuffers and QSettings to restore the images but there is a line of code which just crashes the application. Dec 28, 2014 · myPixmap = QtGui. QPainter(self) point = QtCore. QSize(lbl. The steps to render a rule are as follows: Set clip for entire rendering operation (border-radius) Draw the background (background-image) Draw the border (border-image, border) Mar 4, 2013 · QLabel load image, adjust size. May 7, 2018 · Many many thanks @ekhumoro for your extensive and very precise answer with many useful ressources! In the meantime, I could load an image in a Qlabel, but struggled indeed in integrating Qlabel with a main window. Putting images and text in QLabel. Then set the sizeconstraint of your dialog's layout to QLayout::SetMinimumSize . I've been asked to put the company logo into the main window of my app. My image is of size 512x512 and I want it to stay at that size and not stretch/shrink. QLabel *label = new QLabel; label->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Minimum); label->setWordWrap(true); label->setText("This is a very long text. No user interaction functionality is provided. (0, 0, 400, 220) works fine but (0, 0, 420, 220) will not upload the Image and closes down the GUI without any errors. Jan 6, 2015 · I am beginning with a Qt5 programming. Pixmap image size in Qlabel. inside the overloaded resizeEvent, set the min width/height of your fixed side to the appropriate length (according to the pixmap ratio) It should work, but be beware of potential recursive resizeEvents, as this is a clunky workaround. When decreasing the windows's height: If the image doesn't have to change, even if the label does, the window resizes normally. 0+5, 5+5, 10+5, 20+5. I'm creating a simple image viewer with the ability to cycle through a list of images with left/right arrow keys. It has made QLabel quite big by default. This is how the label looks, the QPixmap is solid red to show the actual contents, so the white parts are the margins: The margins are 11 pixels for the top and bottom, 7 pixels for the left part, and 45 pixels for the right. K 1 Reply Last reply 1. In Qt 4. To load an image from a file, you can use the QPixmap. ui. Dec 9, 2021 · The image size is based on the font metrics, so it should technically fit the minimum size hint of the label. ir/xgUvJ. setScaledContents(True) @AngryDuck "the image is located im my project directory" - But can the application find it there? Is it given as a relative path in the final setting code (that generated by the designer) and if yes, does this relative path match the working directory of the application when it is actually run (which doesn't neccessarily need to match the project directory exactly)? Mar 28, 2019 · When I later dynamically add an image, it gets scaled to the size of the Label, even if it could be larger, if only the SpacerItems would "give way" do the Label. Improve this answer. open(img_file) Then setting this to a QImage: final_image = QImage(image_file) May 23, 2012 · I have a QLabel that is loaded with a pixmap. Cheers, May 8, 2017 · The requirement of the application is to restore the image when the application shuts down so that the user doesn't have to input the image again, which I am struggling to come up with a solution. 1. How can i display image like i said? my codes: main. cpp Jan 10, 2012 · When the main window is made smaller, the composite widget initially maintains its size and then resizes toward the correct size in several steps (about 10-15). 3. show() window. we can do it directly from QtCreator, by setting its pixmap property. I do not want the image repeating it self when the size of the QLabel goes beyond the size the image. To create a Qt Resource File, we go to the menus: File > Qt > Qt Resource File. A QLabel can contain any of the following content types: Content. munna. but there are a few possibilities to achieve what you want: use the html-capabilities of the QLabel to display text+image. Share. Setting. hauteur is a float that represents the height) self. setPixmap(dotPng) self. 04 machine, but it doesn't work on Windows 10. Jul 20, 2017 · 1 Answer. shrinking large image into smaller QLabel. QScrollArea provides a scrolling view around another widget. May 11, 2017 · I want the QLabel to take the size of the text. 6. Dec 1, 2019 · @Christian-Ehrlicher I translated another PyQt script, the first one did not even run in python this one Qlabel with image in round shape does the job in python. displaying image using a label. Rewrite dropEvent () method: set drag event. MasterBlade @mrjj 15 Apr 2018, 20:21. QtWidgets import QLabel Code language: Python (python) Second, create a new instance of the QLabel class: label May 1, 2011 · Teams. Additionally, since I have the the three labels in a Dec 28, 2014 · myPixmap = QtGui. Default screen. Feb 6, 2015 · setAutoFillBackground(true); QPalette palette; palette. However, this will ignore the aspect ratio of the image and scale Jul 13, 2018 · In my main code I need to display videos , images and textedits on listWidget . For example: text = "Some very long text that will possible need to be wrapped and take up more than one line. Q&A for work. QtWidgets import * # You can plug in a path to an image of your choosing. However, when I try to save the image and retrieve the pixmap, it is the original loaded. my window. 8 times the label height then on resizing the text and containing widget grow larger with each step until eventually the app crashes. so any idea of how to do the trick? i used Pixmap not QPicture: QPixmap image(":/new/prefix1/background/main logo_. 2, wherein we are using stylesheet file to set background image for QLabel using "background-image" property in stylesheet. May 10, 2022 · Open pyside6-designer\Qt-designer: 1. SCALE_SMOOTH); Make sure that the label width and height are the same proportions as the original image width and height. myLabel. setPixmap(QPixmap(self. But I am curious as to why I am unable to increase the size of the bbox. urlopen(image_url). 4. Aug 15, 2013 · If the size of the image is less than the size of the square box , the image should be displayed as it is. self. getWidth(), label. You can ask QLabel to scale the image, by setting QLabel::scaledContents property to true. Once you have loaded an image into a QPixmap, you can then display it by creating a QLabel and setting the pixmap Jun 10, 2006 · If you are doing something custom, you could override QLabel::sizeHint () and return appropriate size for the widget (or maybe just set minimumSize). The example shows how to combine QLabel and QScrollArea to display an image. setPixelSize ( 20 ); f. Running python 3. Select Form > View Python Code. Apr 23, 2017 · window = Window() window. py. hauteur)) I've put my label into a layout in order to put it in a scroll widget then. Maybe there is a way to prevent the stretching/size changing of a The QLabel contains an image. M. It is a common problem to display a QImage in a widget. 7 on both operating systems with freshly installed PyQt5 packages. A QPixmap can be used to display an image in a PyQt window. However, the current size of the dialog box is determined by the size of QLabel, or rather, by the size at which the QLabel shows the image. As an initial attempt I tried with the below code, with the intention to reduce the size of all images with: picSize = QtCore. jpg"). We are developing an application in QT5. layout6. Thanks for any help and/or suggestions. Qt provides four classes for handling image data: QImage, QPixmap, QBitmap and QPicture. QtWidgets import *. 0. What I am doing now is the following: Jun 2, 2020 · mywin = Labelexample() mywin. Image Viewer Example. The QFrame class can also be used directly for creating simple placeholder frames without any contents. 3 and later, the alignment of the image within the rectangle can be specified using image-position. In other words, if the picture is 600 x 900 pixels, scale to 100 X 150. It seems like the images are not arranged in listWidget. getScaledInstance(label. resize(800, 600) sys. I want the image to scale to the size of the QLabel. join("data", "images", image_name)) myScaledPixmap = myPixmap. jpg') self. Otherwise, your picture will be distorted. In both these cases, the aspect Jun 21, 2022 · QLabel load image, adjust size. @Wieland thanks, i display my image like that. addWidget(self. I have made my comment the answer as it solved the initial issue. I was showing scrollbars "as needed". png"); ui->label->setPixmap(image); [Example of fitting an image](http://s4. I need the Qlabel to auto resize in accordance with the main window size changes. resize(450, 415) mywin. /assets/launch_image. path. Should the user decide to scale the window up, the image should grow. To create a label widget, you follow these steps: First, import the QLabel widget from PyQt6. image). How do I make this work on Windows? Oct 25, 2018 · Hello, I have a Qlabel that I load an image to and I have read a lot of forum posts but can't seem to keep the aspect ratio. Right click and select layout (on free spot on form, not label) , select say layout horizontally. paint the component yourself. A QLabel can contain any of the following content types: Unlike background-image and border-image, one may specify a SVG in the image property, in which case the image is scaled automatically according to the widget size. Qt. exec_()) This is my application, my goal is simple - have an image that fills the whole window and resizes after the window resize. The Image Viewer example shows how to combine QLabel and QScrollArea to display an image. So i tried to set QSizePolicy=Ignored and QSizePolicy=Fixed using QtDesigner but bot of them didn't work. the problem is that when bigger images come in the sequence, the window size also grows bigger. A QLabel can contain any of the following content types: May 15, 2011 · Wiki. setScaledContents(True) in my ui_mainWindow class, and if I turn it to False, it fixes the scaling but it only shows a small portion of the image because the image is much larger than the QLabel. Following doesn't work. KeepAspectRatio) The above code works fine without any issue. 2. Oct 17, 2012 · Viewed 13k times. cpp to see how it displays the pixmap. Other solution is to add scrollbars using QScrollArea. Instead you may need to use border-image. QLabel is used for displaying text or an image. Also, the scaling reduces the images further down, instead of Dec 23, 2016 · Just a question on the side: are you sure you want fixed geometry for all your widgets? Unless you have a strict display size writing scalable UI is the preferable way to go. Jul 8, 2015 · Immediately afterwards, you need to set the maximum size for the QLabel to something very large, otherwise, you will not be able to enlarge the image at all as you will have specified the maximum size to be that of the current image. You could create a custom widget, derived from QWidget, and place two QLabels on it. After creating my QLabel, its size shows as 512, 512 but I can see that it has stretched. Apr 29, 2020 · Solved shrinking large image into smaller QLabel. Jan 9, 2008 · Re: QLabel size, for image display. The image should fill the QLabel's parent layout. load () method. This should make your dialog grow so all the content will fit inside of it. dotPlot. I learned this dragging method on the following website In this example, a QLabel widget is created with an image file ("image. That is, they are equal to the value of the style sheet for this side plus the value of margin (), i. read()) image_file = Image. QImage::scaled () has flags for things like keeping the aspect ratio. May 21, 2019 · This works fine on my Ubuntu 18. Sep 26, 2021 · import sys from PyQt5. Jul 27, 2015 · and here after i clicked it the third time, as you can see the pixmap in the middle should be replaced by one without a crossbar: #include "mainwindow. Your answer is related to initialize the font size. The Widget we should use to show pictures is a QLabel. Jan 17, 2017 · it stretches the image in both vertical and horizontal. And on a button press, want to draw a transparent section on this QLabel. QImage is designed and optimized for I/O, and for direct pixel access and manipulation, while QPixmap is designed and optimized for showing images on screen. With some tweaks it worked in c++ for me. You may call QWidget::updateGeometry () to notify the layout system about the geometry change. You can scale the image before setting it on the label, usnig the label's size as the target size. // create Qpixmap from Qimage. Sep 14, 2021 · Image { anchors. QtGui import * from PyQt5. I'd like to have a ImageGrab with bbox (0, 0, 800, 700) and a QLabel with size(800, 700) so it can fit it perfectly. At the moment, the second image is achieved by changing the stylesheet of the qlabels with a slider. Sep 10, 2013 · Another issue is that I would like to make the dialog appear with a height and width that were a percentage of the height and width of the parent widget respectively. I can set the size of the label but when I put the label in some layout manager the labels get resized to take the whole space. (self. If you put your label into a layout its size will change to fit the text it contains (in the limits of the available space given by the layout). : "Unable to Launch Qt uic". Solution. Should the user decide to scale the window down, the image should shrink until it reaches a minimum size; at which point the window should no longer be scalable. QtWidgets package library is used in both examples to create and manipulate the QLabel widget. lal-> setFont (f); May 18, 2021 · Use PIL package to save smoothly. QLabel is typically used for displaying text, but it can also display an image. OpenGl can paint muh faster but you cant just use widgets inside a openGL context Jul 25, 2014 · When increasing the windows's height, the label and image grow accordingly, keeping its ratio. setMinimumSize(1, 1) self. When it comes to sizes, size () returns valid data only after you show the widget for the first time. Right-Click on label and go to "Promote to": 3. : I want to increase or decrease the font size ,dynamically to fit the text, with specified /Fixed ,area/size. Jun 25, 2014 · I have a label, and I set both padding in the style sheet and a margin using setMargin (). Next, with the Label selected, look in the right hand QLabel properties panel for the pixmap property (scroll down to the blue region). Jun 18, 2012 · 3. On the picture I've shown what I already have and what I want to have. The frame style is specified by a frame shape and a shadow style that is used to visually separate the frame from surrounding widgets. ui->label->setPixmap(pix); May 4, 2015 · setPixmap(image->scaled(width(),height(),Qt::KeepAspectRatio)); QLabel::paintEvent(event);} This re-scales the image in every paint event. Image dimg = img. size = self. setBold ( true ); lal-> setFont (f); return w; It make text bold but does not increase font size. getHeight(), Image. I am working on an image crop application. img_file = cStringIO. When the text inside a QLabel wraps to ~4 lines, everything works fine, but when the QLabel requires more than that, it fails to continue increasing the height of the QLabel, and cuts off some of the text on the top and bottom. exec_()) eg. Using a layout will take care of the resizing (though you can set the size policy of every widget to ensure a specific way of handling resize events for each of these). QtWidgets import QLabel Code language: Python (python) Second, create a new instance of the QLabel class: label May 10, 2012 · 23. I used QIcon to display image thumbnails . Learn more about Teams Detailed Description. If you are interested in PyQt5, you can refer to I wrote before: [PyQt5] Tutorial (3) QMainWindow, QIcon, QPixmap, QPalette. and one time I was successful but it ruined the resolution of the image. J-P Nurmi. click here if you have an issue at step 3. If the the text height is set to more than about 0. Aug 29, 2012 · I think the image property is for subcontrol only (see doc), while border-image is valid for labels. May 19, 2021 · To implement this function in PyQt5, you must complete the following three steps: Allow dragging of the component that display the picture (QLabel): setAcceptDrops (True) Rewrite dragEnterEvent () method: acceptProposedAction () receive drag. jpeg' class PixmapLabel(QLabel): """ A label widget that has a pixmap. Jun 9, 2019 · I want to use ResizeEvent to receive the size of the window and set it to the size of a QLabel, in order to make the image stretched and adapted to the window's dimensions. Sep 6, 2017 · 7. The visible margins are 5, 10, 15 and 20 (I checked with an image editor). By default QLabel has a horizontal-sizePolicy of QSizePolicy::Preferred which makes it to resize just enough to display its content (or expand if there is empty space around Sep 2, 2016 · Re: Dynamically scale QLabel with QImage to content while keeping aspect ratio. Consider using scaledContents property and set it to true with QLabel::setScaledContents () function for your label to adjust containing image size to the size of the label. png) ```![alt text](image url) QLabel is used for displaying text or an image. QPixmap(os. If the image needs to shrink, then the window doesn't resize at all. Jan 1, 2013 · You can either have a widget try to give feedback to a layout as to what size it wants to be and always draw the image to the full dimensions of the widget or you can allow the layout to resize your widget any way it wants and always paint the image at the appropriate scale and position withing the bounds of the widget. e. But if I use QIcon , I can display all but the images are behind the other widgets. use two labels, one with the text and one with the image. These properties can be set together using the setFrameStyle () function and read with frameStyle (). . How can i do this. K. width() / 2 , lbl. Setting the image property on sub controls implicitly sets the width and height of the sub-control (unless the image in a SVG). Scrollable QLabel image in PyQt5. MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) {. scaled(self. To provide a "skin" or background that scales along with the widget size, one must use border-image. img7. Don't forget most of us that answer questions on these forums pull the code right out of our heads as an example for people to base their Mar 20, 2011 · But the image was not resized as smoothly as QLabel does. Mapping position of QLabel on an Mar 1, 2019 · f. the Qlabel which is holding the loaded image is of a fixed size. I want the image to turn smaller to accommodate the window size, not the other way around. How would I go about retrieving the newly resized image from the QLabel and retrieving it as a QImage? Apr 18, 2017 · I am dynamically creating a QLabel named label (that has a QPixmap) inside a QHBLayout named layout inside a parent QWidget named by this such that the QLabel image resizes with parent this but maintains the original image aspect ratio. How can I do this with Widgets ? I tried using QLabel but it has no option to set aspect ratio or fillMode. QtWidgets module: from PyQt6. Bug Reports. 9th January 2008, 17:03 #3. You should probably move the setPixmap to resize event instead. I have a fixed size label on a QtDesigner form. While this can be done using QLabel. The window is then shown with the label. QPixmap pix = QPixmap::fromImage(img); // display the pixmap on the label. Even if I do it through the Form > Layout in a Grid. Documentation. But i want to fit image in Qlabel. StringIO(urllib. label) Apr 15, 2018 · These QLabels have setWordWrap (True) and contain text which may be longer than the fixed width of the QScrollArea. Forum. I'm trying to make an horizontal layout with 3 QLabel scale use all its available space. IMAGE_PATH = '. This will return a True or False value depending on whether the image was successfully loaded. Here is the way i implemented this. We are using QPainter class, setCompositionMode method QLabel is used for displaying text or an image. size(), QtCore. Feb 8, 2020 · If there is no minimium size set for the label, the pixmap size will be always used instead. scaledToHeight(self. Nov 29, 2016 · Dynamically change font size of QLabel to fit available space. #include "ui_mainwindow. Of course I can change size via Photoshop but I wonder how to do it programatically. show() sys. Create a new window like this one: 2. But im having no luck. Then I take a look at the paintEvent function of QLabel in qlabel. Feb 19, 2012 · This sucessfully draws the image on to myLabel which is a QLabel, however, It is very scaled, I have. Connect and share knowledge within a single location that is structured and easy to search. The above is a simple function of using QLabel to display the picture we want. Result is, that instead of having "too much Label" left and right, I then have "too much label" top and bottom. Since the border-image property provides an alternate background, it is not required to Nov 7, 2018 · Furthermore, you calculate the new size of the QLabel in a wrong way, i. The logo (a banner really) is considerably larger than the default size of the QLabel. Here is how im trying to do it right now: import urllib, cStringIO. Jun 4, 2020 · Drag this onto the QMainWindow to add it. Apr 14, 2018 · That is, place Label on dialog form. On Windows it will properly display the no image available, but when an image is found the QLabel will just end up blank, displaying nothing at all. Jun 25, 2014 · The image has big margins, however, which come from the style. void MainWindow::chromaticity() { in The QLabel class allows you to create a label widget that displays text, an image, or an animated image (GIF). I am trying to zoom in a picture i implemented with QPixmap but nothing works. Unfortunately, it doesn't seem the case. M 1 Reply Last reply 15 Apr 2018, 20:21 4. exit(app. The label is used to display images, let's assume it's used to display thumbnails of 100x100 px. I have it set so that when the window/QLlabel is resized, the image of the qlabel resizes as well. Thanks Oct 21, 2017 · Hi Add a layout to centralwidget and it can be centered Make sure to set labels. by a left click of the mouse I can resize my window and the image takes a new size. How to add both an image and text to a QLabel. fill: parent source: "/path/to/coo/image" fillMode: Image. Python PyQt Qlabel Resize. MainWindow with a single QLabel added. height() / 2) But the below code is not reducing the size of image even after using: Mar 19, 2017 · The image doesn't resize when I use both scaled and scaledToWidth/Heigth methods. A background-image does not scale with the size of the widget. 10th June 2006, 15:28 #5. vg up in xj nr td tq mt xt du