Qt get window size. Worked on Win10 with QT5.
- Qt get window size QApplication. 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. You can then subtract the work area height from the desktop height to get the taskbar size. E. However, when I show a QWidget window with a single content window it automatically resizes itself to be tiny. So we just add 32 to our min y in order to make space for the titlebar. – N. height (); // Create and init the image: . It is displayed as normal, and rendered to a texture. width (); int sizeY = this ->size (). In order to perform custom handling of the event, you'll need to create your own resize event handler. 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. 7 Qt window resize problem. I enlarge the window with my mouse. 1. If I create the QWidget parent window without a child It is a nice large default size. The content orientation is simply a hint to the windowing system about which orientation the window contents are in. You can call the 'size' function from any widget. then we setGeometry() to resize and reposition the window in its constructor. this works just fine on windows 10. 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. 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. 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. So that one scroll step exactly scrolls one widget down. Qt includes a very simple method to get the size of the screen ( width and height ). 8/qwidget. 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. 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. Which ones depend on Qt version. width(),undoView->y()); } This will move undoView on x axis as mainwindow resize. Apparently, the x() and y() parameters are what I am looking for but I just cannot figure out a way to use them. 10 Qt C++ minimize and maximize window. QWindow::geometry()returns the window geometry exclusive of its frame (both in Qt 5 and Qt 6). show() just tells the window manager to show the window. The maximum size of a window is 2/3 of the screen's width and height. The base size is used to calculate a proper window size if the window defines sizeIncrement(). – AwesomeCronk. 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. Thanks a lot The units should be pixels, so I'm really thinking this is a bug with Qt. 3. I have to resize the main window, where that widget is placed and then I should get the real size of that widget. 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. So in your case you have to give it a delay to get the correct information. If you call this from the main window it will return the size of the main window. That does not look like the default output from QString::number(), what is going on?. Restore Qt Window size and position problem. 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). If the widget is visible when it is being resized, it receives a resize event (resizeEvent()) immediately. The main window can be found with a loop over all windows. Commented Jan 28, 2013 at 10:58. I would like the textEdit window to use as much of the parent window as possible. 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(). I'm "surprised" at one thing. #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. window property:. 1/5. bq. Now I need just a simple window with a single content widget (QGlWidget) that covers the entire client area. 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. F Offline. 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. setFixedSize(self. Currently it looks like The window with the words cube(); is the textEdit Window. 8. Something like. 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). height (); cout << "width : " << win_cw << "\nheight : " << win_ch << endl; cout << "Window void QWindow:: setBaseSize (const QSize &size) Sets the base size of the window. Here i The QApplication::desktop() function is used to get an instance of QDesktopWidget. ? Update: mainwindow. Modified 6 years, 6 months ago. Commented May 25, Window { id: window flags: Qt. 39 Qt: Set size of QMainWindow. This was set on 125% on the desktop from with I tried. 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. The Window below it is for messages and its height is set and its set to only output. Simply calling scroll_bar->width(); for freshly created vertical bar returns 101, which is obviuosly wrong. Related questions. Qt. } 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. Get the size of a viewport in a I want to have a small QFormLayout that grows to fill its parent widget. Thanks. If you know a better way, please post it! mainwindow. QPoint(0, 0)) since it is the top-left position. I think either one will solve this. 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. But when I'm trying to get size of mw, I get QSize(800, 600), which is obviously wrong. I tried: PyQt5. If the sizeHint() is less than (200, 100) and the size policy is expanding, the window will be at least (200, 100). When I start the application and call show on the main_window, only part of the QTableWidget is shown. FramelessWindowHint visible: true height: 300 width: 400 MouseArea { id: resize anchors { right: parent. The contents of the obscured areas Try to use Qt capabilities, QT_AUTO_SCREEN_SCALE_FACTOR=0, QT_SCALE_FACTOR=1. 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. See here for a nice diagram. 3, you never need QWidget::createWindowContainer() anymore. Window; With Qt 5. J Offline. h. Hello i want to save the position and size of the application window to load it for the next time. QWidget::createWindowContainer() was provided to let us embed a QQuickView inside a QWidget. I put a QFormLayout inside that 'window', then put some controls inside that QFormLayout. 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. 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. When i use void mywindow::resizeEvent(QResizeEvent *event) { qDebug() << "Height : " << hei There are Window properties attached to all Items. 7+ you even get access to all the Window properties via Window. Pretend the window is 480x640. Here it is: QSize size = qApp->screens()[0]->size(); Note that this function works perfectly in Android and iOS too. After setting to 100% result is PyQt6. --> You have to ask for the size later (e. This doesn't take the window titlebar into account though. org/doc/qt-4. The example is really clunky, and surely there is a better way to get the height. 0. So, is there a way to determine vertical scroll bar width correctly in Sets the size increment (size) of the window. The handling of window decorations has changed in the Qt Wayland implementation from Qt 5 to Qt 6. filter. What you can do: in addition to the window's size, save whether it's maximized or not (QWidget::isMaximized()). 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. I tried this code but I know there are some better way. 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. I'm currently trying to create a sort of generic QML component for some tool window I'm planning. but we want to support any platform equally. Qt uses 9px as default font size, but users (on Linux) can change this by using qtconfig. setAttribute(QtCore. log(mainWindow. m. QtWidgets. height } Qt remembers the window size and position of the normal window and then restores that when exiting the maximized state. It is made somewhat like a QMessageBox. If you create button and press on it you can get your result qml: 1024 and 768. Then its size can be obtained. save(path); }. import QtQuick 2. QDialog(). If you read them right-to Answer: After calling MainWindow::show(), then get the size. 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'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. 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). The widget's screenGeometry() function provides information about the geometry of the available screens with. void MainWindow::resizeEvent(QResizeEvent *e) { undoView->move(e->size(). A simple example for ResizeEvent is:. QGuiApplication::primaryScreen also errantly returns 1920x1080 as my screen dimensions, which should be 4k. ui file using the QWidget template in Qt Designer. 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. You can get a particular Item's Window with myItem. height() pixels vertically, with baseSize() as the basis. I'll add that window sizes are also similarly incorrect when I try to query them. After searching for a way to determine the height of window title bars, I finally came up with a way to obtain this value. 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. For Example: I start my Application. Just in case, what does qApp->screens(). 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. Qt: Set size of QMainWindow. onCompleted: { console. 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. class test : public QOpenGLWidget{. Button { id: button QWindow has reportContentOrientationChange() that can be used to specify the layout of the window contents in relation to the screen. 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. 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. This all works reasonably well, but the QFormLayout always stays at the size I set in Qt Designer. 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. For windows, the screen size is also taken into account. Modified 5 years, 2 months ago. I only use the information from QScreen to show my main windows in a reasonable initial default size, centered on the screen. The window can be expanded but not contracted - it has a minimum size. If I trigger window->adjustSize(); then the window size does adjust, but again, not to the table size. 6). py file generated from Qt Designer or explicitly using: QtWidgets. 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. @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. 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. 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. 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. Here is All windows can be obtained from QGuiApplication::allWindows(). Going from normal to fullscreen and back works. Window Size. 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. 0 ApplicationWindow { id: appWnd minimumWidth: 300 minimumHeight: 300 } From Qt Wiki. Viewed 1k times You should use QWidget::saveGeometry() to get the window size and QWidget::restoreGeometry() to restore it, for instance with QSetting. mapToGlobal(QtCore. White rectangle is my QGraphicsView. Component. All objects inside the QVBoxLayout do have the same geometry. g. In some cases the size may not be correct You can use QWidget's "size () property": http://qt-project. int sizeX = this ->size (). Is there any easier way to get mainwindow size of a Qt app? I need it deep in my Qt app. Hi all, I need to get current size of window. I found the following example self. I'm trying to scale the data so the data shows only on the size of the window, without wrapping or scrolling. When the user resizes the window, the size will move in steps of sizeIncrement(). Worked on Win10 with QT5. 1 Reply Last reply . QtCore. I need to stretch it to cover whole black space and resize it Qt: Adjusting QGraphicsView to window size. I then take that texture, and stretch it across the entire screen. You can change the setMinimumSize to setFixedSize to obtain a window with fixed size, or you can set both minimum and maximum sizes. I noticed that the size of the QMessageBox (and the size of its label) depends on the size of the message displayed. Ask Question Asked 7 years, 1 month ago. In Qt 5. Window. 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. window. If you want to get events for a different object, you can install an event filter using QObject::installEventFilter. In your case, you would need to create a class that derives from QMainWindow and reimplement the resizeEvent function. 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. hpp. how to get the default size of a window in pyqt4. The QVBoxLayout should now stretch to fit the window and will resize automatically when the entire window is resized. Qt layouts take care of the rest. 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. html#size-prop on the root widget of the window. Viewed 2k times 1 I'm trying to FramlessWindowHintproduces a borderless window, if supported by the window manager. width is the current top level window/view width. width height: Window. I need to keep the Windows frame; I had a look at the Window Geometry page of the Qt doc. I change the position of my window with mouse. To the layout is added a QTableWidget only (for the moment). Layout gets updated 'by chance' by QWidget kernel when the window is moved. 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). Looks like this FlowLayout class was not designed to have it's minimum size change on user action. width); } After that minimumHeight and minimumWidth take their values. EDIT Oh, I see what @sierdzio is saying below. height + " and " + mainWindow. 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. 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:. So a small part of your window will be hidden behind I end up with a window that is larger than 1024x768. Commented Mar 1, 2020 at 15:08. Add some more calculation as per I have a QDialog I'm working with. 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. 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. 5 and 5. width (); int win_ch = win. 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). when I expand or reduce the Main Window size. I have a main window which contains a main widget, to which a vertical layout is set. Now if i close my window and start my application next time again, i want to save the settings. User can resize this application as he wants, so I have to resize some pictures in it. But if you want to access the window associated with an item then use the Window. I need to resize the image to fit the viewer in OpenCV itself. 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. 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). So, how do I get the system default font size? I read the documents, but I can not find any API. – user1173240. The first thing I did was set the default, minimum and maximum size of the window. @Natural_Bugger Well the code looks right to me now. 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. QRect(0, 0, 2560, 1440) as needed. 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. 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: . 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 . D. 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. – I'm currently trying to adapt a vertical scrollbar's step size to the height of the objects inside the scrollable and responsive QVBoxLayout. count() return ?. The image management would be done in OpenCV and the GUI will be QT based. How can I change the size of a window from minimized to normal at 20 p. The number of screens available is returned by screenCount, and the screenCountChanged() signal is emitted when screens are added or removed. I'm on windows but I want It's not that complicated. Ask Question Asked 5 years, 2 months ago. . example. I created a new . – peppe Resizing is not instantaneous in Qt. 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. Qt window resize problem. Starting from Qt 5. Scaling. 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. Your output 0801 & 0291 have leading 0s, and are 4 digits long. 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. 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. It is the size constraint that links the layout to the toplevel widget's size. However, if double click the title bar, it will resize. 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. 2, you need to use it to embed Qt Quick content in a QWidget. 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. The below works fine under Qt 4. Is there a way to set the window size while including the Windows frame. size : QSizeThis property holds the size of the widget excluding any window frame. size()) I'm not sure how to implement this. Fuel. Here is the code: class MainWindow(QtGui. 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. 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. This is definitiv a I'm trying to adjust QGraphicsView to size of my window, but my solutions just doesn't work. (If you don't call that function, you can't embed -- that's all). Description: I had the same problem as Pieter. 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. showMaximized can make the window maximized. I can put it in the . in a slot) thank you for your answer, but I'm a little confused. Or call QWidget::adjustSize to actually run the layout and resize the entire widget tree. h : The available size is the size excluding window manager reserved areas such as task bars and system menus. Where this is the How to get screen size in Qt. Override showEvent and/or resizeEvent and get the geometry there. There's no guarantee, however. size()) without errors but it's not working. 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. width() pixels horizontally and sizeIncrement(). YourItem{ width: Window. samghd beqzxr wumkx onvq lsgh ftvm wjpgzi secka fulrtro qyei