Qt get window size. but we want to support any platform equally.

Qt get window size Thanks. right bottom: parent I don't think you can do this with standard Qt mechanics as what you describe differs from what is considered the default behaviour (resize any application - the font size usually stays the same). QWindow::geometry()returns the window geometry exclusive of its frame (both in Qt 5 and Qt 6). I need to keep the Windows frame; I had a look at the Window Geometry page of the Qt doc. This is definitiv a I'm trying to adjust QGraphicsView to size of my window, but my solutions just doesn't work. Commented Mar 1, 2020 at 15:08. User can resize this application as he wants, so I have to resize some pictures in it. Commented Jan 28, 2013 at 10:58. If you create button and press on it you can get your result qml: 1024 and 768. Window Size. 7 Qt window resize problem. When I start the application and call show on the main_window, only part of the QTableWidget is shown. count() return ?. If you call this from the main window it will return the size of the main window. So a small part of your window will be hidden behind I end up with a window that is larger than 1024x768. Commented May 25, Window { id: window flags: Qt. 1. However, when I show a QWidget window with a single content window it automatically resizes itself to be tiny. I've looked at QApplication::style()->pixelMetric(), and I can get the height of the title bar using For those looking for actual QWidget size (inner size): If you want to know the size of the widget usable space (the inner space), you need to use geometry, not frameGeometry which adds the size of the window frame to the widget own size. size : QSizeThis property holds the size of the widget excluding any window frame. Pretend the window is 480x640. I then take that texture, and stretch it across the entire screen. – peppe Resizing is not instantaneous in Qt. I want to get the size of my QT Main Window or QT Label, since I am trying to make a full screen image viewer. I noticed that the size of the QMessageBox (and the size of its label) depends on the size of the message displayed. Qt layouts take care of the rest. A combination of using QWidget::setSizePolicy() and QBoxLayout::setStretch() To keep widget size determined, I have to find a width of the scrollbar, as texedits geometry depends on it. Get the size of a viewport in a I want to have a small QFormLayout that grows to fill its parent widget. Fuel. when I expand or reduce the Main Window size. But when I'm trying to get size of mw, I get QSize(800, 600), which is obviously wrong. 1 Reply Last reply . Or call QWidget::adjustSize to actually run the layout and resize the entire widget tree. Note on X11 that if the given window doesn’t have the same depth as the root window, and another window partially or entirely obscures the one you grab, you will not get pixels from the overlying window. I need to resize the image to fit the viewer in OpenCV itself. See here for a nice diagram. How to reset the size of the Qt's window font? Hot Network Questions Handling a customer that is contacting my subordinates on LinkedIn demanding a refund Qt includes a very simple method to get the size of the screen (width and height). How would I make the size of my QDialog adjust automatically like a QMessageBox?Presently my QDialog contains a button box and a label, and the QDialog is nope, I don't want the size of the window but the moment when the user release the window, not the moment when he resized the window without releasing it. It’s useful when you wish to keep the same window size, but rotate the contents instead, especially when doing rotation animations There is a resize event. I need to stretch it to cover whole black space and resize it Qt: Adjusting QGraphicsView to window size. Which ones depend on Qt version. Component. Modified 6 years, 6 months ago. What you can do: in addition to the window's size, save whether it's maximized or not (QWidget::isMaximized()). but we want to support any platform equally. QGuiApplication::primaryScreen also errantly returns 1920x1080 as my screen dimensions, which should be 4k. Button { id: button QWindow has reportContentOrientationChange() that can be used to specify the layout of the window contents in relation to the screen. The base size is used to calculate a proper window size if the window defines sizeIncrement(). } pointer_test = new test; pointer_test ->setMinimumSize(100,100); but this size change when i drag the window around, so @eyllanesc In theory, once showFullScreen() is called, the window is sized to that of the screen and the window bar at the top is hidden. ApplicationWindow { id: main_window_root visible: true width: 1000 height: 800 property alias main_window_root: main Use QWidget::sizeHint to get the desired size of the top level widget based on the sizeHints of all child widgets and layouts. To get the taskbar height: from win32api import GetMonitorInfo, MonitorFromPoint monitor_info = on Windows apart of the screen resolution it's possible to adjust the size of text, apps etc. import QtQuick 2. Now if i close my window and start my application next time again, i want to save the settings. Simply calling scroll_bar->width(); for freshly created vertical bar returns 101, which is obviuosly wrong. The QDesktopwidget has some methods to get the resolution in pixels and some to get the the size in milimethers: mydesk-> widthMM(); mydesk->heightMM(); However, this does not correspond to the physical size, when I measure my screen with a ruler, there is a setCentralWidget (ui -> graphicsView); // Try to get the MainWindow size and set these values to the image size: . Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Hello guys I am trying to screenshot my own qt application window. html#size-prop on the root widget of the window. Just in case, what does qApp->screens(). window property:. Ask Question Asked 7 years, 1 month ago. Then its size can be obtained. In order to perform custom handling of the event, you'll need to create your own resize event handler. – N. You can change the setMinimumSize to setFixedSize to obtain a window with fixed size, or you can set both minimum and maximum sizes. void MainWindow::resizeEvent(QResizeEvent *e) { undoView->move(e->size(). I'm trying to scale the data so the data shows only on the size of the window, without wrapping or scrolling. Viewed 2k times 1 I'm trying to FramlessWindowHintproduces a borderless window, if supported by the window manager. how to get the default size of a window in pyqt4. I don't know, which version of QML you're using, but if you can youse QtQuick 2, then you would set ApplicationWindow as your toplevel Item in QML like this:. After setting to 100% result is PyQt6. I want my application to start maximized because the entire computer will be dedicated to that task, so I found the showMaximized() function that fills that requirement, instead of the standard show(). Do not set the viewport in the QGLWidget::resizeGL handler; you should use that to make adjustment to things that depend on the screen size and which are expensive to change, like textures used for a When I create a QMainWindow without explicitly specifying its dimensions, PyQt will give it a -let's say- "standard size" which is not the minimum that the window can get. Override showEvent and/or resizeEvent and get the geometry there. 8. Note that adjustSize will limit top level windows to 2/3 of the screen so you may not get what you want for large windows. The window and image widget can be resized to the image's original size with this code: I am trying to set my window / QDialog to not be resizable. All objects inside the QVBoxLayout do have the same geometry. this works just fine on windows 10. – user1173240. size()) I'm not sure how to implement this. label_1 Size Before Expanding: 100 100 label_2 Size Before Expanding: 100 30 label_1 Size After Expanding: 378 100 label_2 Size After Expanding: 378 171 How can I get the true dimensions for the QLabels when the QMainWindow is Great MCVE, exactly what's needed to easily investigate the issue. Add some more calculation as per I have a QDialog I'm working with. show() just tells the window manager to show the window. QRect(0, 0, 2560, 1440) as needed. Qt: Set size of QMainWindow. height } Qt remembers the window size and position of the normal window and then restores that when exiting the maximized state. The image management would be done in OpenCV and the GUI will be QT based. width height: Window. window. It is made somewhat like a QMessageBox. Here is a code example, which would be instantiated from Just use QWidget::width() and QWidget::height() out of the resizeGL event to obtain the window's sizes and determine your viewport dimensions from that. QWidget): def __init__( I want to get the size of my QT Main Window or QT Label, since I am trying to make a full screen image viewer. If the widget is visible when it is being resized, it receives a resize event (resizeEvent()) immediately. When the user resizes the window, the size will move in steps of sizeIncrement(). If you want to get events for a different object, you can install an event filter using QObject::installEventFilter. Do you have any idea how to do it? Well I have nailed down the problem to 3 lines in the stylesheet if i put either in the code the window will always open to the smaller size (but you can see the window first tries to go full screen then is quickly changed). save(path); }. I'm on windows but I want It's not that complicated. I'm "surprised" at one thing. J Offline. So we just add 32 to our min y in order to make space for the titlebar. Layout gets updated 'by chance' by QWidget kernel when the window is moved. Another thing to note is that if you replace [0] with 1, 2, 3, you can access other monitors (if there are any) on desktop computers. example. py file generated from Qt Designer or explicitly using: QtWidgets. class test : public QOpenGLWidget{. I would like the QFormLayout to fill its parent In OpenGL terms, what I want to do is modify the projection matrix of a Qt GUI. Starting from Qt 5. 5 and 5. ? Update: mainwindow. YourItem{ width: Window. If I create the QWidget parent window without a child It is a nice large default size. setFixedSize(self. You can also use resizeEvent The following method computes the final size of the window setting it so it covers the 90% of the whole screen available space, and then centers it (left-to-right flow): Qt includes a very simple method to get the size of the screen (width and height). Is there any easier way to get mainwindow size of a Qt app? I need it deep in my Qt app. #ifndef FILTER_HPP #define FILTER_HPP #include <QtGui> class ResizeFilter : public QObject { Q_OBJECT public: ResizeFilter(); protected: bool eventFilter(QObject *obj, QEvent *event); }; #endif Is there any way to get the width of the frame for a normal window, PRIOR to showing any windows? After showing a window, I know I can subtract the size() from the frameSize(), but that doesn't work until after the window is shown. If I manually trigger window->centralWidget()->adjustSize(); (window is the QMainWindow) then the frame around the table adjusts (to the default window size, not to the table size) and does not adjust the window size with it. Description: I had the same problem as Pieter. mapToGlobal(QtCore. Here i The QApplication::desktop() function is used to get an instance of QDesktopWidget. Going from normal to fullscreen and back works. 0 ApplicationWindow { id: appWnd minimumWidth: 300 minimumHeight: 300 } From Qt Wiki. I found the following example self. In some cases the size may not be correct You can use QWidget's "size () property": http://qt-project. (If you don't call that function, you can't embed -- that's all). log(mainWindow. QWidget::createWindowContainer() was provided to let us embed a QQuickView inside a QWidget. But if you do the layout correctly, as Christian pointed out, then the user can resize the windows just about any way they want without problems. Qt. The 3 problem lines are as follows: font-family: "DejaVu Sans"; font: bold 14px; border-style: solid; I designed and implemented an application in Qt I wanted to fix the window size so I made the mistake of hard coding the places of the widgets on the window in all the different screens. This will scale widget sizes relative to the font size, so you only Qml Window is generated initially from 0, 0 and when it generated (with 0, 0) the following code is executed . qml, is it possible to get the Qt application window size? I know that I can declare the app window root in a global property like below and get the size anywhere. . h. The Window below it is for messages and its height is set and its set to only output. void Test::capture(const QString &path) const { QPixmap originalPixmap; QScreen *screen = QGuiApplication::primaryScreen(); int y = 100; int w = 1600; int h = 450; originalPixmap = screen->grabWindow(0,x,y,w,h); originalPixmap. 1/5. Here is the code: class MainWindow(QtGui. The only way this can go wrong is if the frame widths change as a The idea is that the one widget display is a short-form version to save screen space. then we setGeometry() to resize and reposition the window in its constructor. Can I set this size at will in any way? My goal is to get this "standard size" according to the currently visible widgets, when I set the visibility of some widgets on/off. --> You have to ask for the size later (e. Is there a way to just initialize a QDialog's width and height and not change the x and y coordinates without using a ui file? I just have a simple QDialog and want to set only the width and height, and have the x and y automatically set to the center of the parent, but when I try setGeometry, the inherited geometry's x and y are 0. I can extend the window manually to see it all, but I would like the window to have its size nicely adapted to the size of @AmrCoder said in how to let Maximum size of the window is fixed size: QSize size = qApp->primaryScreen()->availableSize(); this->setFixedSize(size); If you do that, your window will be a bit too high, because setFixedSize() needs the target size of the window excluding the window decoration. Thanks a lot The units should be pixels, so I'm really thinking this is a bug with Qt. Scaling. Build and run, size the main window to some large size, check the menu action then move and resize the single widget version, specifically make it as small as possible. I can put it in the . Example, a is Qt::Landscape, b @VFCraig All properties are accessible using the "id" if in your scope you have access to is "id", otherwise you will have to expose some (without code it is difficult to help you). org/doc/qt-4. Use a little bit of help from Qt by setting QT_AUTO_SCREEN_SCALE_FACTOR to 1 or a correspondent AA_EnableHighDpiScaling attribute (introduced in Qt 5. I tried this code but I know there are some better way. I would like the textEdit window to use as much of the parent window as possible. Is there a way to set the window size while including the Windows frame. The below works fine under Qt 4. If I trigger window->adjustSize(); then the window size does adjust, but again, not to the table size. height (); // Create and init the image: . For Example: I start my Application. QDialog(). I change the position of my window with mouse. 6). I tried: PyQt5. In Qt 5. But if you want to access the window associated with an item then use the Window. This doesn't take the window titlebar into account though. Looks like this FlowLayout class was not designed to have it's minimum size change on user action. Modified 5 years, 2 months ago. What Qt does is take the information from showMaximized to activate the flag of the native window (library that depends on each OS) then after a time T the OS applies that flag and sends it the new geometry. Here it is: QSize size = qApp->screens()[0]->size(); Note that this function works perfectly in Android and iOS too. FramelessWindowHint visible: true height: 300 width: 400 MouseArea { id: resize anchors { right: parent. 8/qwidget. I'll add that window sizes are also similarly incorrect when I try to query them. The QVBoxLayout should now stretch to fit the window and will resize automatically when the entire window is resized. If you read them right-to Answer: After calling MainWindow::show(), then get the size. The widget's screenGeometry() function provides information about the geometry of the available screens with. From that point I want the menu action to flip between the two main window sizes, but it There are a number of tasks that I want to execute if the window size changes, is there a way to execute code when that happens? I've read some stuff on QResizeEvent but when functions get involved they usually involve passing a QResizeEvent to the function, which I do not know how to do. Jump to navigation The following method computes the final size of the window setting it so it covers the 90% of the whole screen available space, and then centers it (left-to-right flow): void MainWindow::centerAndResize {// get the dimension available on this screen QSize availableSize = qApp-> desktop () Get Qt Extensions; Unsolved; Collapse Home; Qt Development; General and Desktop; Get the size of the widget in the layout But I either get the full size of the window or wrong size of the widget, how could I get the size of the bounding boxes I draw?Thanks. The example is really clunky, and surely there is a better way to get the height. E. size()) without errors but it's not working. This was set on 125% on the desktop from with I tried. Where this is the How to get screen size in Qt. It is the size constraint that links the layout to the toplevel widget's size. I created a new . Qt window resize problem. This all works reasonably well, but the QFormLayout always stays at the size I set in Qt Designer. I think either one will solve this. D. Access functions: QSize : availableSize const: Notifier signal: maps from the coordinate system defined by orientation a into the coordinate system defined by orientation b and target dimensions target. g. Is there a way to actually set the size of said window according to the size of the ListView it contains? The size of the ListView would be partly dependent on the model data that its delegate is rendering. Your code would look something like this: label->resize (w, h); // initial size label->setSizePolicy (QSizePolicy::Ignored, QSizePolicy::Ignored); The label widget was in a QVBoxLayout with a few buttons in the window, but this may work with other layout types too. – I'm currently trying to adapt a vertical scrollbar's step size to the height of the objects inside the scrollable and responsive QVBoxLayout. m. bq. The contents of the obscured areas Try to use Qt capabilities, QT_AUTO_SCREEN_SCALE_FACTOR=0, QT_SCALE_FACTOR=1. White rectangle is my QGraphicsView. height (); cout << "width : " << win_cw << "\nheight : " << win_ch << endl; cout << "Window void QWindow:: setBaseSize (const QSize &size) Sets the base size of the window. To the layout is added a QTableWidget only (for the moment). – AwesomeCronk. I have to resize the main window, where that widget is placed and then I should get the real size of that widget. So, is there a way to determine vertical scroll bar width correctly in Sets the size increment (size) of the window. width() pixels horizontally and sizeIncrement(). So I want to set the window as big as possible (not fullscreen, still want Windows task bar), and set it fixed, which makes double click disabled. I enlarge the window with my mouse. Now the application is done and it works perfectly on my screen (or any screen with 1920*1080) resolution but when I tried on a 4k screen the window Re: How to check for window size changes? Hai, i'm new here, how do i get the window size while running, sometime i will resize the window and get the window size. So in your case you have to give it a delay to get the correct information. showMaximized can make the window maximized. QtCore. The problem is that I want my widgets to be ratiometric to the resulting useful size of the app window so that we can change hardware or window managers at some point in the future I'm trying to create a graph and I need to know the size of the window the user is running the code in. ui file using the QWidget template in Qt Designer. EDIT Oh, I see what @sierdzio is saying below. width); } After that minimumHeight and minimumWidth take their values. 10 As David Heffernan mentioned, you can use GetMonitorInfo with pywin32 to retrieve the work area size, or the size of the desktop without including the taskbar. h : The available size is the size excluding window manager reserved areas such as task bars and system menus. That does not look like the default output from QString::number(), what is going on?. In your case, you would need to create a class that derives from QMainWindow and reimplement the resizeEvent function. The handling of window decorations has changed in the Qt Wayland implementation from Qt 5 to Qt 6. When i use void mywindow::resizeEvent(QResizeEvent *event) { qDebug() << "Height : " << hei There are Window properties attached to all Items. QPoint(0, 0)) since it is the top-left position. height + " and " + mainWindow. hpp. I've tried to do this like: void MyClass::setWidgets(QList<QWidget*> list, QWidget parentWidget) The problem is that, if the window gets maximized, I would like to remember its size before being maximized so that it gets saved too. It is displayed as normal, and rendered to a texture. I put a QFormLayout inside that 'window', then put some controls inside that QFormLayout. Window. in a slot) thank you for your answer, but I'm a little confused. On the other hand the You need to look into Qt's layout system - using layouts will handle automatically resizing your objects based on the size of their parent. You can use frameGeometry() and geometry() to get the frame widths (horizontal and vertical), and you can then subtract these from your desired frame size before calling resize() (or setFixedSize() if that is more appropriate for you). You can call the 'size' function from any widget. int sizeX = this ->size (). The maximum size of a window is 2/3 of the screen's width and height. Window; With Qt 5. 3, you never need QWidget::createWindowContainer() anymore. 0. I only use the information from QScreen to show my main windows in a reasonable initial default size, centered on the screen. QtWidgets. onCompleted: { console. I have a main window which contains a main widget, to which a vertical layout is set. Hot Network Questions Why is the spectrum of the Laplacian on the torus discrete? how do i get the current GUI display size for QOpenGLWidget. I'm currently trying to create a sort of generic QML component for some tool window I'm planning. F Offline. There's no guarantee, however. So that one scroll step exactly scrolls one widget down. width (); int sizeY = this ->size (). By default, this After creating your QVBoxLayout in Qt Designer, right-click on the background of your widget/dialog/window (not the QVBoxLayout, but the parent widget) and select Lay Out -> Lay Out in a Grid from the bottom of the context-menu. Qt uses 9px as default font size, but users (on Linux) can change this by using qtconfig. The number of screens available is returned by screenCount, and the screenCountChanged() signal is emitted when screens are added or removed. How can I change the size of a window from minimized to normal at 20 p. A simple example for ResizeEvent is:. @Bremenpl If you want to some it in accordance with the MainWindow that you can get width and height from QResizeEvent and move the QUndoView. Hello i want to save the position and size of the application window to load it for the next time. Restore Qt Window size and position problem. The window can be expanded but not contracted - it has a minimum size. height() pixels vertically, with baseSize() as the basis. filter. Apparently, the x() and y() parameters are what I am looking for but I just cannot figure out a way to use them. @Natural_Bugger Well the code looks right to me now. width (); int win_ch = win. width(),undoView->y()); } This will move undoView on x axis as mainwindow resize. Here is All windows can be obtained from QGuiApplication::allWindows(). Currently it looks like The window with the words cube(); is the textEdit Window. Is there any possible to do that? The position of a widget is with respect to the parent if it has it, and if it does not have it is with respect to the screen, so in the case of MainWindow, since it is a window, pos() should be used, if it were a widget that has a parent you must use self. Qt includes a very simple method to get the size of the screen ( width and height ). Currently I'm using the window's size at the moment of it's closing, but if it is maximized by then I end up saving a very big size instead of what I @Christian-Ehrlicher said in how to get the current height and width of the window?: You can't get a valid size until the window is shown. width is the current top level window/view width. After searching for a way to determine the height of window title bars, I finally came up with a way to obtain this value. So, how do I get the system default font size? I read the documents, but I can not find any API. You can get a particular Item's Window with myItem. setAttribute(QtCore. The main window can be found with a loop over all windows. The first thing I did was set the default, minimum and maximum size of the window. Your output 0801 & 0291 have leading 0s, and are 4 digits long. You can then subtract the work area height from the desktop height to get the taskbar size. Something like. Also here the size and position of the normal The size policy on a toplevel layout is meaningless if you don't set the size constraint as well via QLayout::setSizeConstraint. The content orientation is simply a hint to the windowing system about which orientation the window contents are in. Ask Question Asked 5 years, 2 months ago. QApplication. Worked on Win10 with QT5. 7+ you even get access to all the Window properties via Window. 39 Qt: Set size of QMainWindow. Viewed 1k times You should use QWidget::saveGeometry() to get the window size and QWidget::restoreGeometry() to restore it, for instance with QSetting. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company While I am in a random QML file which is not the parent main. Now I need just a simple window with a single content widget (QGlWidget) that covers the entire client area. 10 Qt C++ minimize and maximize window. If you know a better way, please post it! mainwindow. Add a comment | Your Answer Reminder: Answers So I made a PyQt5 app and it works on one computer but when I try to run it on another one with a bigger resolution it doesn't work. In the widget constructor like MainWindow::MainWindow() you can't get the correct size of the widget like QGraphicsView in Grid Layout because in that constructor the widget's size and location are not determined. It looks like widget didn't change his size, just looks bigger (?) when I called showMaximized() method? The geometry of any widget in Qt is invalid until the widget gets shown. However, if double click the title bar, it will resize. Related questions. See also You can use the availableGeometry(QWidget*) method in QDesktopWidget, this will give you the geometry of the screen that this widget is currently on. Here it is: QSize size = qApp->screens()[0]->size(); Note that this function works perfectly in cout << "Window size is :" << endl; int win_cw = win. 3. For windows, the screen size is also taken into account. If the sizeHint() is less than (200, 100) and the size policy is expanding, the window will be at least (200, 100). Hi all, I need to get current size of window. Here it is: QSize size = qApp->screens [0]->size (); Note that I trying to get window size but I getting incorrect size, first of all I set window geometry to 800 x 480 and result is 640 x 480. 2, you need to use it to embed Qt Quick content in a QWidget. ztq lhhk cszhf qogvwj iczkp jymhbul kmsme sdsk ipyv awu