Qt get window size This is called DPI Unaware on Windows. For example if a QMainWindow subclass has a central widget, with children and layout managers; then if widgets are hidden and variable size widgets like QTextEdit are visible it seems impossible to change the size of the window from code. If you call this from the main window it will return the size of the main window. 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. If window is 0, then the entire screen will be grabbed. org/doc/qt-4. 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. – Dec 20, 2018 · 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. qml, is it possible to get the Qt application window size?. You can also use resizeEvent handling or layouts managers, or any other number of other methods, but it really depends on the logic of what kind of work you have to do. Nov 18, 2015 · You can call the 'size' function from any widget. The following method worked for me to get accurate physical size of my screen in mm. Or call QWidget::adjustSize to actually run the layout and resize the entire widget tree. How should I get the size max possible? 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 without touching the app at all. int sizeX = this ->size (). Apr 20, 2019 · This has not been satisfactorily answered. Here is the code: class MainWindow(QtGui. I'm on windows but I want to use something similar to Linux equivalent Sep 16, 2008 · I have a QMainWindow in a Qt application. height (); // Create and init the image: . Let me know if it works! Mar 1, 2020 · I am wanting to develop a screensaver from my python project, but in order to properly fullscreen it, I need to get the size of the window. I've looked at QApplication::style()->pixelMetric(), and I can get the height of the title bar using Jun 13, 2014 · If you want to get events for a different object, you can install an event filter using QObject::installEventFilter. 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. height + " and " + mainWindow. Mar 28, 2022 · While I am in a random QML file which is not the parent main. When opening again it should recover based on that info. width (); int sizeY = this ->size (). Sep 29, 2014 · 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 that one scroll step exactly scrolls one widget down. Aug 13, 2020 · hello, I'm trying to get the screen size for my desktop app. Apr 5, 2018 · how do i get the current GUI display size for QOpenGLWidget. This is because I need to set a QOpenGLWidget's size accordingly. Component. Mar 4, 2013 · 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. I have the same or similar issues. width); } Nov 15, 2013 · I'm trying to create a graph and I need to know the size of the window the user is running the code in. The image management would be done in OpenCV and the GUI will be QT based. When I close it I want it to store its current restore size (the size of the window when it is not maximized). Then its size can be obtained. void QWindow:: setCursor (const QCursor &cursor) set the cursor shape for this window Nov 18, 2015 · You can call the 'size' function from any widget. Nov 25, 2014 · 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. QPixmap QScreen:: grabWindow (WId window = 0, int x = 0, int y = 0, int width = -1, int height = -1) Creates and returns a pixmap constructed by grabbing the contents of the given window restricted by QRect(x, y, width, height). hpp. onCompleted: { console. filter. Jul 24, 2019 · showMaximized can make the window maximized. 8/qwidget. This works well when I close the window in r Aug 5, 2014 · Window Size. See also setMinimumSize(), setMaximumSize(), setSizeIncrement(), and baseSize(). example. . g. in a slot) Sep 27, 2012 · You can use QWidget's "size () property": http://qt-project. html#size-prop on the root widget of the window. QSIze size = this->size(); In some cases the size may not be correct (in the constructor before the widget is completely created or displayed) until after the widget is first shown. show() just tells the window manager to show the window. So I'm using closeEvent to May 22, 2013 · Use QWidget::sizeHint to get the desired size of the top level widget based on the sizeHints of all child widgets and layouts. All objects inside the QVBoxLayout do have the same geometry. 5 PyQt5 It is useless to set any sort of size policies on a window with a layout that has only fixed size items - unless you want to grow the spacing between the widgets. void QWindow:: setBaseSize (const QSize &size) Sets the base size of the window. For example, Windows has a special compatibility setting which scales everything to correct size, while keeping the application think that it renders of a low-resolution display. The main window can be found with a loop over all windows. The only way this can go wrong is if the frame widths change as a result of the resize. --> You have to ask for the size later (e. } pointer_test = new test; pointer_test ->setMinimumSize(100,100); but this size change when i drag the window around, so like to get the current window size after i dragged. Is there a way to do this, or do I need to use a layout? If a layout is the way to go, which one do I use? Windows 10 Python 3. Try to use Qt capabilities, QT_AUTO_SCREEN_SCALE_FACTOR=0, QT_SCALE_FACTOR=1. Since they Jul 3, 2018 · Qml Window is generated initially from 0, 0 and when it generated (with 0, 0) the following code is executed . It might seem hackish, and it is a bit, but it also works really well. log(mainWindow. Scaling. The first thing I did was set the default, minimum and maximum size of the window. I'm trying to scale the data so the data shows only on the size of the window, without wrapping or scrolling. project file: QT += core gui headers #include #include #include QScreen *screen = QGu Dec 9, 2013 · Leave it to the OS. A simple example for ResizeEvent is:. Is there any easier way to get mainwindow size of a Qt app? Sep 1, 2021 · 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 know that I can declare the app window root in a global property like below and get the size anywhere. 7. Next, I created an empty Text item which items and text sizes will be based off. QWidget): def __init__( Aug 5, 2014 · 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. Here is my code at present. #ifndef FILTER_HPP #define FILTER_HPP #include <QtGui> class ResizeFilter : public QObject { Q_OBJECT public: ResizeFilter(); protected: bool eventFilter(QObject *obj, QEvent *event); }; #endif Apr 6, 2016 · I'm currently trying to adapt a vertical scrollbar's step size to the height of the objects inside the scrollable and responsive QVBoxLayout. class test : public QOpenGLWidget{. Apr 13, 2017 · The following python3 code allows to get screen size but is there an QDesktopWidget is gone in Qt 6: this would return the size of the qt5 window, OP asked Jul 7, 2018 · How to get Qt application window size from a QML file which is not the QML where the root window is declared? Hot Network Questions I want to apply my Canadian passport urgent service to pickup in 3 to 9 days Jul 15, 2021 · All windows can be obtained from QGuiApplication::allWindows(). I need to resize the image to fit the viewer in OpenCV itself. The base size is used to calculate a proper window size if the window defines sizeIncrement(). QImage image = QImage (sizeX, sizeY, QImage::Format_RGB32); // Fill the image with colors: for (int x = 0; x < sizeX; x++) { for (int y = 0; y < sizeY; y++) { Jan 31, 2022 · You can't get a valid size until the window is shown. If you want your widgets to stay fixed size, but the spacing between them to grow, the only change necessary to the code below is to set all widgets to fixed size policy. The window and image widget can be resized to the image's original size with this code: Dec 23, 2020 · I'm trying to make a config file that would contain information about window size, position and state when closing. However, if double click the title bar, it will resize. QSizeF screenSize = QGuiApplication::primaryScreen()->physicalSize(); However, in Qt documentation I found the following sentence: Oct 30, 2019 · // Try to get the MainWindow size and set these values to the image size: . iaxih jpb fdvmk wkgvo mvtfeb vysjt nlehw ciqiaqdi dro biyuew