Qt auto screen scale factor. 0, the item will be collapsed to a single point.

Qt auto screen scale factor Select a reference device and calculate a scaling ratio for adjusting image and font sizes and margins to the actual screen size. 213 - The AA_EnableHighDpiScaling and AA_DisableHighDpiScaling: 214: application attributes: 215: 216: Enabling either will make QHighDpiScaling call QPlatformScreen::pixelDensity() 217: and use the value provided as the scale factor for the screen in: 218: qputenv("QT_AUTO_SCREEN_SCALE_FACTOR", "1"); 在Windows平台，若需要根据分辨率设置不同的界面大小，可以采用以下方式 I made an application with good responsiveness using QHBoxLayout and QVBoxLayout and set the maximum value of the size of labels, buttons, lineedit but all of that is chaotic and useless when on a windows table that has a small screen with a large screen resolution with 125% resolution. 0, or Based on the error, it looks like you need to use QT_AUTO_SCREEN_SCALE_FACTOR, QT_SCREEN_SCALE_FACTORS or QT_SCALE_FACTOR in place of QT_DEVICE_PIXEL_RATIO. This is also happen with nature grid-line-system. I was already planning on re-doing the whole UI in Designer to have better Instead use: QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors. Now printenv | grep QT_SCALE shows the variable set to 1 but here is the catch. code: import sys from PyQt5 import QtCore, QtGui, QtWidgets from PyQt5. Trilby wrote: Andy3153 wrote: QT_AUTO_SCREEN_SCALE_FACTOR=1 (you can replace the value 1 with whatever suits you) Software Engineer The Qt Company, Oslo. png is not visible. QT_AUTO_SCREEN_SCALE_FACTOR=0 QT_SCALE_FACTOR=2 Log out and back in to ensure that the settings have applied everywhere. I expect UI to automatically scale when running on high DPI, but the scaling doesn't necessarily work as expected. A 1 Reply Last reply . Note that applications can and sometimes do enforce this at an application-level QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors. I have a high-resolution monitor. If the solutions above did not resolve When it does, the Font scaling causes all the text to be clipped and basically unreadable. export QT_AUTO_SCREEN_SCALE_FACTOR=0 export Variable name: QT_AUTO_SCREEN_SCALE_FACTOR Variable value: 0 Variable name: QT_SCREEN_SCALE_FACTORS Variable value: 3. 7. If you provide a negative value, the item will be flipped end for end around its origin. fractional scaling on QT seems to be an issue, but with a fresh install the old workaround works again (some lingering issue with years of incremental QT updates?) however for whatever reason a fractional scaling of 1. This will scale widget sizes relative to the font size, so you only QT_AUTO_SCREEN_SET_FACTOR=0 QT_SCALE_FACTOR=0. You can set those as system environment variables or use some cmd basic scripting to set them at a per application level: @echo off set QT_SCALE_FACTOR=1 qtcreator. But now the problem is the UI is Conceptual Model¶. 5 QT_AUTO_SCREEN_SCALE_FACTOR=0. This replaces QT_AUTO_SCREEN_SCALE_FACTOR (now deprecated), and corresponds to the Qt::AA_EnableHighDpiScaling application attribute. Hi everyone, so I want to run my Qt applications with native Wayland support to benefit from perfect scaling on my HiDPI screen and so on. Instead use: QT_ENABLE_HIGHDPI_SCALING to enable platform plugin controlled per-screen factors. user. Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. You can try doing what Qt Creator is doing: Warning: QT_DEVICE_PIXEL_RATIO is deprecated. But with matplotlib, this environment variable has no effect (no matter what one sets it too, it has no effect). Standard DPI is 96 DPI. 0;3. As you can see in the screenshot the font for PGAdmin is much smaller than VS I played with idea of figuring out screen scale using QScreen::logicalDotsPerInch() and QScreen::physicalDotsPerInch() but results are not what I expected. Only then fonts / icons look OK: The sizing we pass to the OSG content is not scaled correctly because of the Qt auto scaling. Can QT seems to scale twice under gnome. I have a toolbox UI that was getting squished really The KDE Plasma desktop environment will set a variable called QT_AUTO_SCREEN_SCALE_FACTOR to QT_AUTO_SCREEN_SCALE_FACTOR=0 for export QT_AUTO_SCREEN_SCALE_FACTOR=0 export QT_SCALE_FACTOR=2 . But using QT_AUTO_SCREEN_SCALE_FACTOR and scaling by one was enough of a nudge for it to react properly to Gnome's settings. qputenv Can I set the QT_AUTO_SCREEN_SCALE_FACTOR 1 behavior via an API call rather than by the environment variable? I want to detect if my Qt application is running on a high dpi screen, Many PyQt6 / PyQt5 show small screen using : PyQt6-WebEngine. 2. 6, Qt 5 applications can be instructed to honor screen DPI by setting the QT_AUTO_SCREEN_SCALE_FACTOR environment variable. Follow The big advantage of this solution is that Windows does the scaling, not Qt. If you have a shared system (eg. QApplication(sys. 1. However they say: In the longer term, the application should be adapted to run unmodified: 1) Always use the qreal versions of the QPainter drawing API. For just QT_SCALE_FACTOR, everything in RPCS3 scales correctly, however any factor less than 1 causes all manner of weird rendering glitches and clipping issues. At a guess, it sounds like QT_SCREEN_SCALE_FACTORS might be worth a look first. This corresponds to setting the QT_AUTO_SCREEN_SCALE_FACTOR=1. bash_profile and add this line to export the correct environment variable like this : QT_AUTO_SCREEN_SCALE_FACTOR=0 qbittorrent And after giving it a try in a terminal it perfectly worked, but now I can't close the terminal without getting qbittorrent closed too. I would like to know if there is a way to auto scale the app window when the app detects a new resolution. I can drag the main menu preview between the 1920/1080 screen and the 3840/2160 screen and there's only very minor changes. I tried to find the stremio desktop file (which I don't know what that is). What is the expected correct behavior? The warning should not be displayed, presumably by modifying the source code according to the Flameshot version v0. Apply to any user. In other words, I would like to exclude another Qt-based application from scaling by 300%. Any other suggestions? This is what the window should After I dock out, the scaling seems to get messed up and feels like a factor 2. Add a comment | Your Answer Thanks for contributing an answer to Raspberry Pi Stack 1 In new Creator there is substitution for Enable high DPI scaling mode option . You can read more about these QT_AUTO_SCREEN_SCALE_FACTOR [boolean] enables automatic scaling, based on the monitor's pixel density. Instead use: This works all fine and dandy when compiling and running normally on a high DPI screen. Anyway the environment variale is set but its vaule is zero. QtWidgets import QApplication, QDialog, If i set os. Hi the screenshot. AA_EnableHighDpiScaling) at startup after checking environment variables like QT_AUTO_SCREEN_SCALE_FACTOR and QT_ENABLE_HIGHDPI_SCALING. cpp, line 413 Aborted (core dumped) I'm getting this Console message: “Qt Warn: Warning: QT_DEVICE_PIXEL_RATIO is deprecated. While this works fine on, say, Virtualbox on qutebrowser it does not. Instead use: QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen QT_AUTO_SCREEN_SCALE_FACTOR=1 zoom. On Linux, since I use Linux, disabling automatic scaling for Mulet it's as simple as executing: QT_AUTO_SCREEN_SCALE_FACTOR=0 mudlet On Windows it's essentialy the To change the scale factor on a Linux computer: Open ~/. Maybe you can play around with the QT_SCALE_FACTOR and QT_AUTO_SCREEN_SCALE_FACTOR environment variables. The QT_AUTO_SCREEN_SCALE_FACTOR environment variable is an opt-in that program users can define, in order to control how the program should look. The scale factor is expressed as a floating point number, for example 1. The font and cursor are too small for various applications. 8) documentation: it is on exactly this topic. Qt 5. env = QT_AUTO_SCREEN_SCALE_FACTOR,1 - (From the Qt documentation) enables automatic scaling, based on the monitor’s pixel density; env = QT_QPA_PLATFORM,wayland;xcb - Tell Qt applications to use the Wayland backend, and fall back to x11 if Wayland is unavailable; env = You might want to look into the QT_AUTO_SCREEN_SCALE_FACTOR and Qt::AA_EnableHighDpiScaling methods. Bug summary. Imho a regression and very difficult to work export GDK_DPI_SCALE=1. Improve this answer. Multiple Supported platforms are X11, Windows and Android. 1 Reply Last reply Reply Quote 0. However, I only need this scaling for two apps in particular. 1) for comparison. env = QT_AUTO_SCREEN_SCALE_FACTOR,1 - (From the Qt documentation) enables automatic scaling, based on the monitor’s pixel density; env = Qt Variables. 14的 QT seems to scale twice under gnome. My preference would be to keep the Font at the same size relative to the gui After I dock out, the scaling seems to get messed up and feels like a factor 2. Instead use: QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen Hi guys, I tried to set QT_AUTO_SCREEN_SCALE_FACTOR and QT_SCALE_FACTOR to 1 , but this didn't help, but the solution in qt. 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. 6, however, when using QT_AUTO_SCREEN_SCALE_FACTOR=1 the text scaling optin is igonred, and it does still scale the Ui by 2, and the text rendering is bad (spacing between characters). profile or ~/. Therefore I export the following variables (not all related to scaling, just to let you know): QT_QPA_PLATFORMTHEME=qt5ct QT_IM_MODULE=ibus QT_AUTO_SCREEN_SCALE_FACTOR=1 I played with idea of figuring out screen scale using QScreen::logicalDotsPerInch() and QScreen::physicalDotsPerInch() but results are not what I expected. If you set the factor to 0. Recently, probably following a reboot after an update, I noticed that all KDE programs (including the start menu, taskbar, switcher, settings and the decoration on windows etc. profile in your favorite editor. The application operates in device-independent pixels, which are then mapped to Unsetting QT_AUTO_SCREEN_SCALE_FACTOR solves the issue and texstudio looks as it should on both screens. 5, scaling was implemented in the platform plugins, leading to duplication of code. More information on the Qt blog. Qt uses a model where the application coordinate system is independent of the display device resolution. My preference would be to keep the Font at the same size relative to the gui Warning: QT_DEVICE_PIXEL_RATIO is deprecated. for 100% scaling Added the QT_ENABLE_HIGHDPI_SCALING environment variable which enables high-dpi scaling based on display DPI. This will not change the size of point sized fonts, since point is a export QT_AUTO_SCREEN_SCALE_FACTOR=0 export QT_FONT_DPI=120; Save the changes with Ctrl+O; Close the file with Ctrl+X; Reboot your system and check again. How can i let Qt::AA_EnableHighDpiScaling know which is base DPI it should rely on to scale? I have been using KDE Plasma for a while now, with the global scale set the default to 100%. 6). The application operates in device-independent pixels, which are then mapped to the physical pixels of the display via a scale factor, Since Qt 5. If automatic detection of DPI does not produce the desired effect, scaling can be set manually per-screen ( QT_SCREEN_SCALE_FACTORS) or Qt will automatically account for the display resolution when using higher level APIs such as Qt Widgets and Qt Quick, and applications only need to provide high-resolution assets, such as images and icons. Follow answered Jul 7, 2019 at 1:09. Have anyone have experience about? Screeshot: On macOS, Qt Creator forces high DPI scaling, which means that it allows Qt to use the system scaling factor as the Qt Creator scaling factor. environ["QT_AUTO_SCREEN_SCALE_FACTOR"] = "1" then in the QTableWidget there is wrong line alignment between grid lines and QHeaderViews borders lines. If you run Flameshot with Instead use: QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors. The document you are referring to does the same, but not manually: Yes, this still is an issue. If I play around with the factors (wich I have as 1. 2 in the same Warning: QT_DEVICE_PIXEL_RATIO is deprecated. Offline #16 2021-11-12 21:16:30. In general, it would be easier to calculate the screen scales for X and Y directions and apply them to any dimensional parameter which is passed to the OSG/OpenGL content. 12 (which makes the GUI controls render correctly) worked fine until I installed xorg-xrdb (which I need to configure urxvt to - The QT_AUTO_SCREEN_SCALE_FACTOR environment variable. I recommend you read the Scalability page in the current Qt (4. If you want that QT_AUTO_SCREEN_SCALE_FACTOR=1 QT_SCALE_FACTOR=1. My notebook has HiDPI, so my resolution is large (3200 x 1800) and I need to set Ubuntu scale to 200%: However, Stremio doesn't respect that scale setting. I tried to fix it with QStyledItemDelegate with no luck. Multiple screens may get different scale factors. Use property binding to implement use cases not covered by the layouts. 0. A Beginning with P4V 2018. 5 and QT_DEVICE_PIXEL_RATIO=auto, where Qt didn't apply scaling to Ui or text. Even with the auto scaling factor, the default qt font is tiny in my hidpi screen, so I have to increase its size from qt5ct from 10 to 11 or 12. e. In every single case, PLASMA_USE_QT_SCALING was getting set as 1, but QT_AUTO_SCREEN_SCALE_FACTOR always kept being 0. env = QT_AUTO_SCREEN_SCALE_FACTOR,1 - (From the Qt documentation) enables automatic scaling, based on the monitor’s pixel density; env = QT_QPA_PLATFORM,wayland;xcb - Tell Qt applications to use the Wayland backend, and fall back to x11 if Wayland is unavailable; env = screen 1 - 1366 x 768(Recommended) screen2 - 2560 x 1440(Recommended) screen 3 - 1920 x 1200(Recommended) I have designed an app with Qt designer, when I preview the design on the various screens. So, you just need to edit ~/. 0. The application operates in device-independent pixels, which are then mapped to the physical pixels of the display via a scale factor, known as the device pixel ratio. On Qt 5. 6 display. For example, to display alternative versions of images on screens with low and high pixel density or automatically adapt view contents according to the current screen export QT_AUTO_SCREEN_SCALE_FACTOR=1. From the information here it seems that you can go about to either set a custom scale factor or a custom DPI awareness scheme. Next, add these variables to ~/bashrc to apply similar scaling to QT apps. 1 Reply Last reply . There is currently no available solution for high-DPI support in applications wishing to mix Qt Quick Controls and Qt Quick Controls. bashrc or trying the alternatives QT_AUTO_SCREEN_SCALE_FACTOR [boolean] enables automatic scaling, based on the pixel density of the monitor. However, it I set the environment variable QT_AUTO_SCREEN_SCALE_FACTOR=1 before running the AppImage, it all looks good again. That worked well with Qt 5. 14 introduced a new environment variable QT_ENABLE_HIGHDPI_SCALING which replaces the QT_AUTO_SCREEN_SCALE_FACTOR variable. desktop. It is currently known that in Ubuntu 14. QT_SCREEN_SCALE_FACTORS to set per-screen DPI. I’m my system it’s set to 0 which make VLC UI look tiny. Qt uses a model where the application coordinate system is independent of the display device resolution. #92 This property holds the depth scale factor. On Linux, Qt Creator leaves it to the user to enable high DPI scaling because the process varies so much on different distributions and windowing systems that it cannot be reliably done automatically. 856 DPI for 200% scaling Logicalpixel 192 DPI, Physicalpixel 159. Warning: QT_DEVICE_PIXEL_RATIO is deprecated. . The list can be in one of two formats; either a Supported platforms are X11, Windows and Android. sessionVaria Variable name: QT_AUTO_SCREEN_SCALE_FACTOR Variable value: 0 Variable name: QT_SCREEN_SCALE_FACTORS Variable value: 3. 856 DPI for 150% scaling Logicalpixel 144 DPI, Physicalpixel 159. When I start qt5ct from terminal, the scaling is fixed and icons are normal Any thoughts why this only works for me if I set the QT_SCALE_FACTOR=2 or QT_SCALE_FACTOR=1 ? The scaling with QT_SCALE_FACTOR=1. 5 QT_SCREEN_SCALE_FACTORS= "" flameshot gui 🔗 In the System tray area, Flameshot appears to have duplicate icons/indicator. ” How to fix it? Under some desktop environments you might have issues with scaling when using HiDPI displays. 5 spyder to solve the problem. But using QT_AUTO_SCREEN_SCALE_FACTOR and Warning: QT_DEVICE_PIXEL_RATIO is deprecated. Qt applications support automatic scaling since Qt 5. gnome. profile is ignored. This will not change the size of point sized fonts, since point is a physical unit of measure. d directory, named QT_AUTO_SCREEN_SCALE_FACTOR. If the solutions above did not resolve the issue, try changing the following BOLDED values, since they might differ depending on the screen: For example, to display alternative versions of images on screens with low and high pixel density or automatically adapt view contents according to the current screen orientation. 75 . Follow answered Mar 17, 2016 at 11:07. I'm used: QT_AUTO_SCREEN_SCALE_FACTOR=true; QT_ENABLE_HIGHDPI_SCALING=true; QT_SCALE_FACTOR=1; QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); No one of this ways have no effect. The scale factor can be any real number; the default value is 1. export QT_AUTO_SCREEN_SCALE_FACTOR=1 export QT_SCALE_FACTOR=1. I’ve tried to override it with Home-Manager: systemd. QT_AUTO_SCREEN_SCALE_FACTOR variable is set to 1. Instead use: QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen Instead use: QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors. Re: [SOLVED]Messed up scaling with new Arch update. 方案3：设置highDpi属性 QT_AUTO_SCREEN_SCALE_FACTOR=0; Qt reports the screen geometry as follows (excerpt from qtdiag): Screens: 2, High DPI scaling: active # 0 "eDP-1" Depth: 24 Primary: yes Geometry: 1600x900+1920+0 (native: 3200x1800+1920+0) Available: 1600x900+1920+0 Virtual geometry: 3520x900+0+0 Available: 3520x900+0+0 2 virtual siblings High DPI scaling To enable Qt scaling, I normally follow the Arch wiki, adding export QT_SCALE_FACTOR=2 in my . This corresponds to setting the QT_AUTO_SCREEN _SCALE_FACTOR environment variable to 1. When using a factor that is not the default (like 150%, for instance on a HiDPI display), and trying to capture a screenshot with flameshot, the screen flickers an changes res Instead use: QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors. Scaling will be cross-platform in 5. Reply Quote 0. I have created an application on my previous computer but now when I cloned the git repository of that project onto this new QT_AUTO_SCREEN_SCALE_FACTOR=0 QT_SCREEN_SCALE_FACTORS="1;1" flameshot. Nothing worked. Use the following variables, and then Save. raven-worx Moderators @hle12 last edited by . QT_SCALE_FACTOR=1 QT_AUTO_SCREEN_SCALE_FACTOR=0 QT_QPA_PLATFO Warning: QT_AUTO_SCREEN_SCALE_FACTOR is deprecated. QT_AUTO_SCREEN_SCALE_FACTOR [boolean] enables automatic scaling, based on the pixel density of the monitor. I tried tweaking QT_AUTO_SCREEN_SCALE_FACTOR, QT_SCREEN_SCALE_FACTORS and QT_AUTO_SCREEN_SCALE_FACTOR [boolean] enables automatic scaling, based on the pixel density of the monitor. argv) You Bug report. Good day, I’m having hard time tracking who sets QT_AUTO_SCREEN_SCALE_FACTOR env var. Use QT_QPA_PLATFORM=wayland to run on I'm getting this Console message: “Qt Warn: Warning: QT_DEVICE_PIXEL_RATIO is deprecated. This scales the interface for Qt-based apps to 300% on monitors 1 and 2. PassThrough (Qt 6 default) QT_SCREEN_SCALE_FACTORS Sets a list of screen scale factors. By the way, this is not connected to Qt creator, this affects all apps using qt, for example albert (settings) and texmaker. " How to fix. Display scaling factor is set to 1, but in KDE all QT applications including system settings and desktop icons look as if my display scaling factor was somewhere between 1. 0 (too big) GTK 2/3 applications look small (respecting scaling factor 1. If a Qt application is not scaling for you, you can force automatic display scaling on for Qt5+ applications with the QT_AUTO_SCREEN_SCALE_FACTOR=1 variable. 5; export GDK_SCALE=1; run_your_application_to_be_scaled. Warning: Qt Quick Controls 1. What I am seeing is that the layout scales up, but the fonts stay right where they were, at the sizes Qt Creator assigned them in the form layout tool. As Qt documentation says: Use QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors. Qt Variables. No one of your solutions couldn't help me by the way. 8. It is recommended to set both environment I'm struggling to set default value of QT_AUTO_SCREEN_SCALE_FACTOR in my system (debian bullseye). The application operates in device-independent pixels, which are then mapped to the physical pixels of t According to the documentation, you can set the application to DPI Unaware (thus it will automatically scale but display will be blurred), or to System DPI Aware or to Per-Monitor For the next version 19. Whenever I open a document by What's very weird is that QT Designer's preview screen of the form looks the same on both screens. This won't change the size of point-sized fonts, since point is a physical int main(int argc, char *argv[]) { if (! qEnvironmentVariableIsSet (ENV_VAR_QT_DEVICE_PIXEL_RATIO) && ! qEnvironmentVariableIsSet Since Qt 5. 5 Gnome/GTK can as well be scaled globally with this Gnome setting. 2) Size windows and dialogs in relation to the screen size. If you Flameshot version v0. I experimented with QT_SCALE_FACTOR=2. QT_SCALE_FACTOR to set the application global scale factor. If you run Flameshot with Xwayland in this environment, then Flameshot correctly recognizes the entire screen size and takes area shots. ) as well as all Qt based programs suddenly got scaled up to what looks like 125%. 7, using Qt 5. Replaces QT_AUTO_SCREEN_SCALE_FACTOR (now deprecated), and corresponds to the Qt::AA_EnableHighDpiScaling application attribute. A workaround is to set a couple Qt environment variables: export QT_DEVICE_PIXEL_RATIO=2 export QT_AUTO_SCREEN_SCALE_FACTOR=true" But I'm unsure how to do this ,can anyone help? QT_AUTO_SCREEN_SCALE_FACTOR=1 # This line should make Qt apps use Wayland, according to Arch Wiki. mkv You can also modify the . In 5. Fonts and images look really small: I had to manually add QT_AUTO_SCREEN_SCALE_FACTOR=1 to the desktop entry for the app scale to behave properly. 5 built Qt 5. QT_AUTO_SCREEN_SCALE_FACTOR [boolean] enables automatic scaling, based on the monitor's pixel density. I found smartcode I'm running both on the same physical screen, with Windows under Parallels, and my screen scaling is set up so that the user experience is similar between Mac and Windows Variable name: QT_AUTO_SCREEN_SCALE_FACTOR Variable value: 0 Variable name: QT_SCREEN_SCALE_FACTORS Variable value: 1. export GDK_SCALE=2 export GDK_DPI_SCALE=0. It will in essence Warning: QT_DEVICE_PIXEL_RATIO is deprecated. After reading this and setting QT_AUTO_SCREEN_SCALE_FACTOR to "1" at least it is usable again. 0 or 2. (check image below, the 2 monitors view are compressed) but proposed Conceptual Model#. But unfortunately this brings up other issues with programs I have an issue with QScreen::grabWindow function and it all started after introducing qputenv ("QT_AUTO_SCREEN_SCALE_FACTOR", "1") into the project. desktop file so that this variable is always set, when you start the application via e. Kind regards, Dejan. cpp Warning: QT_DEVICE_PIXEL_RATIO is deprecated. Trying to figure out what I'm supposed to do for this. Please help, if someone has some experience with this. This property holds the depth scale factor. Nicolas Holthaus Nicolas With QT_SCREEN_SCALE_FACTORS=2 and QT_AUTO_SCREEN_SCALE_FACTOR unset, HiDPI works perfectly for me in Qt The text QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors. However, I get back 'QT_SCALE_FACTOR' is not recognized as an internal or external command, operable program or batch file. Now, this should work. Ubuntu 19. export QT_AUTO_SCREEN_SCALE_FACTOR=1 export QT_QPA_PLATFORMTHEME=qt5ct. I have a toolbox UI that was getting squished really small on a 4k monitor and tried to use these but was unsuccessful. The scaling approach. Give it a try! To get this in a Zoom meeting, run zoom in the Variable name: QT_AUTO_SCREEN_SCALE_FACTOR Variable value: 0 Variable name: QT_SCREEN_SCALE_FACTORS Variable value: 1. There, neither QT_AUTO_SCREEN_SCALE_FACTOR=1 nor QT_AUTO_SCREEN_SCALE_FACTOR=0 works, so it seems we are dealing with Qt bugs to On Linux, since I use Linux, disabling automatic scaling for Mulet it's as simple as executing: QT_AUTO_SCREEN_SCALE_FACTOR=0 mudlet On Windows it's essentialy the if QT_VERSION >= QT_VERSION_CHECK(5, 6, 0) qputenv("QT_AUTO_SCREEN_SCALE_FACTOR", "1"); endif You can't rely on screen DPI The QT_AUTO_SCREEN_SCALE_FACTOR environment variable is an opt-in that program users can define, in order to control how the program should look. Share. This scales the app 300% on Supported platforms are X11, Windows and Android. It recommends these techniques (I'm quoting the page here), and then supplies much more detail. 5 to all coordinates) QT_AUTO_SCREEN_SCALE_FACTOR=1 I've tested both methods on windows 10 with a high-DPI surfacebook monitor and the results are scaled properly as expected. Create separate top-level layout definitions for each form factor. 0, or Without setting QT_AUTO_SCREEN_SCALE_FACTOR everything works fine, keep that in mind. I put export QT_SCALE_FACTOR=1 in my ~/. I was probably doing something wrong in my code. Changing gui-scaling does not help: That's how texstudio looks on the first screen: Unsetting Since Qt 5. # Set the QT_AUTO_SCREEN_SCALE_FACTOR environment variable. At least it doesn't scale the UI for me under Linux. 04 supports fractional scaling on Wayland and Xorg. export QT_AUTO_SCREEN_SET_FACTOR=0 export QT_SCALE_FACTOR=2 export QT_FONT_DPI=96 Gnome/GTK applications can be scaled with the following environment variables. sh. ["QT_AUTO_SCREEN_SCALE_FACTOR"] = "1" app = QtWidgets. I searched my . After testing it in terminal you can make the alias permanent by adding it, for example, in . bashrc. QT_QPA_PLATFORM=xcb # For use with Kvantum themes # QT_QPA_PLATFORMTHEME=qt5ct # Pamac told me to add these: That wiki page recommends QT_AUTO_SCREEN_SCALE_FACTOR=1 citing the Qt documentation on High DPI Displays. /Fritzing Reference 👍 7 unique1o1, ferm10n, Dublerq, dvigne, mfragacastro, madislutter, and psi-4ward reacted with thumbs up emoji ️ 2 ferm10n and jwiki95 reacted with heart emoji I did some testing of my own on Arch (Qt 5. I've been told to run QT_SCALE_FACTOR=2. Instead use: QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen You might want to look into the QT_AUTO_SCREEN_SCALE_FACTOR and Qt::AA_EnableHighDpiScaling methods. It will in essence instruct Qt to perform automatic scaling of (non-font-related) graphical operations according to the pixel density of the screen(s). What I mean by that is the UI as a whole seems unaffected by this. 0, the item will be collapsed to a single point. Describe the bug In the default Gnome session, I use 200% scaling (3840×2160 actual resolution). Thus the applications are way too big compared to GTK applications. When I tried to run the application in smaller displays the text inside labels got cut-off and broken. "em", which is a unit that scales relative to the font size) in the widgets stylesheets helps. 8 calibre in the terminal Qt does support a pixel ratio (devicePixelRatio) which is different on my various desktops:) Desktop w1920 h1080 - ratio: 1) Desktop w3840 h2160 with qputenv("QT_AUTO_SCREEN_SCALE_FACTOR", "1") results in Desktop w1280 h720 hi DPI ratio: 3) Desktop w3840 h2160 - ratio: 1 without QT_AUTO_SCREEN_SCALE_FACTOR I QT_SCREEN_SCALE_FACTORS; QT_AUTO_SCREEN_SCALE_FACTOR; QT_FONT_DPI; QT_SCALE_FACTOR; I have QT_AUTO_SCREEN_SCALE_FACTOR=1, which in theory should automagically handle the scaling for me. What I am D:\ATM\cmake-build-debug\ATM. Then you can fix it by setting the QT_AUTO_SCREEN_SCALE_FACTOR env variable to 0, i. The same happens to mouse events coordinates: they are not passed correctly. When I open Spyder though, it looks terrible because the DPI is high. I tried tweaking QT_AUTO_SCREEN_SCALE_FACTOR, QT_SCREEN_SCALE_FACTORS and QT_SCALE_FACTOR. 5 If your display scale is set at 125% use QT_SCREEN_SCALE_FACTORS; QT_AUTO_SCREEN_SCALE_FACTOR; QT_FONT_DPI; QT_SCALE_FACTOR; I have QT_AUTO_SCREEN_SCALE_FACTOR=1, Design UIs using Qt Quick Controls that provide sets of UI controls. This problem does not occur with Ubuntu 17. conf works good. bobcomm bobcomm. So we used QT_SCALE_FACTOR=1. 0). for 100% scaling Logicalpixel 96 DPI, Physicalpixel 159. No matter what screen you are using to use designer, Qt::AA_EnableHighDpiScaling assumes that the form was designed at 72 DPI, though it's ancient. Therefore the occurence of artifacts is minimized. environ["QT_AUTO_SCREEN_SCALE_FACTOR"] = "1". x are not compatible with Qt's automatic high-DPI scaling. exe Warning: QT_DEVICE_PIXEL_RATIO is deprecated. : QT_AUTO_SCREEN_SCALE_FACTOR = 0 vlc your_video_file. @hle12 said in Qt configuration: Warning: QT_DEVICE_PIXEL_RATIO is deprecated. /anaconda-navigator The glyph's fillings are a bit off, but at least size becomes more There is a script setting an environment variable in the /etc/profile. Enabling makes Qt scale the main (device independent) coordinate system according to display scale factors provided by the operating system. 5 for me is the same as I expect UI to automatically scale when running on high DPI, but the scaling doesn't necessarily work as expected. 9, there might be a better Qt uses a model where the application coordinate system is independent of the display device resolution. It resizes the size of buttons ( and icons within them ), labels ( and their font I'm getting this Console message: “Qt Warn: Warning: QT_DEVICE_PIXEL_RATIO is deprecated. What is more you can create a dedicated launcher only for a specific applications setting their own scale factor :-) For Qt these are the variables: export QT_AUTO_SCREEN_SET_FACTOR=0 export QT_SCALE_FACTOR=1 export This property holds the depth scale factor. If automatic detection of Qt uses a model where the application coordinate system is independent of the display device resolution. 5 If your display scale is set at 125% use QT_AUTO_SCREEN_SCALE_FACTOR=1 (you can replace the value 1 with whatever suits you) Software Engineer The Qt Company, Oslo. So, you just need to edit Disables high-DPI scaling in Qt, exposing window system coordinates. This works all fine and dandy when compiling and running normally on a high DPI screen. Short of starting a temporary QApplication at startup to determine screen scaling, and totally disabling it if scaling is equal to 1, (Qt. replied to Axel Spoerl on last edited by AlexNevskiy #3 @Axel-Spoerl Thank you for the answer. ASSERT failure in QXcbIntegration: "Initializing accessibility without event-dispatcher!", file qxcbintegration. For machines with hDPI screens, the environment variable QT_AUTO_SCREEN_SCALE_FACTOR=1 needs to be set, for QT applications. Instead use: QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors. 5")这样的方式也能实现。 所以，5. Much better! This may work for other QT based applications also. havent checked if this affects qml also yet, but just in case. wrote on last edited by #2. When I start qt5ct from terminal, the scaling is fixed and icons are normal However, I couldn't solve the issue as the author didn't leave many details. Use property binding to implement use cases not Instead use: QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors. I've separared the issue in this small piece of code: #include #include #include #include Qt Creator seem having same problem. 10 Unity. So I set os. 6, and should therefore look fine under XWayland. However, that doesn't scale fonts. 856 DPI Warning: QT_DEVICE_PIXEL_RATIO is deprecated. Only then fonts / icons look OK: Anyways, I noticed that if I run QT_SCALE_FACTOR=1 okular, this brings up Okular with the right UI scale so I thought hey, let's just set the environment variable and be done with it. The document you are referring to does the same, but not manually: Qt Variables. mrjj Lifetime Qt Champion. Now, this is all lost in the isolated flatpak environment so, in brief, I'm unable to reasonably run any qt app installed Design UIs using Qt Quick Controls that provide sets of UI controls. Instead use: QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin When it does, the Font scaling causes all the text to be clipped and basically unreadable. The application looks very nice, text is OK and Try to use Qt capabilities, QT_AUTO_SCREEN_SCALE_FACTOR=0, QT_SCALE_FACTOR=1. exe env QT_AUTO_SCREEN_SCALE_FACTOR=1. 4 and 5. Since Qt 5. gsettings set org. Define layouts using Qt Quick Layouts, which can resize their items. 5 and QT_AUTO_SCREEN_SCALE_FACTOR=0. KSuduku, KCalc, KCharSelect, SMplayer, QPdfView UI are QT_AUTO_SCREEN_SCALE_FACTOR=1 If I start texstudio and move it on the second screen, icons are way too bit. The correct way to address this is to get the DPI I've built a Qt Application in my 21" monitor, so all the window sizes and font sizes are perfect for monitor of this size. 04 Unity environments such problems occur. interface text-scaling Warning: QT_DEVICE_PIXEL_RATIO is deprecated. Another note, QT_SCREEN_SCALE_FACTORS (note the trailing "S" -- "FACTORS", not "FACTOR", even if you only have one) is completely different from Setting the environment variable QT_SCALE_FACTOR >= 1 ( say 1. Enabling makes Qt scale the main (device independent) coordinate system according to display scale factors provided by the operating Setting the environment variable QT_SCALE_FACTOR >= 1 ( say 1. I'm on Cinnamon 3. M Offline. I get different results with the UI. Other Warning: QT_DEVICE_PIXEL_RATIO is deprecated. – Qt will automatically account for the display resolution when using higher level APIs such as Qt Widgets and Qt Quick, and applications only need to provide high-resolution assets, such as images and icons. and no one of the items of this menu doesn't have an effect on pane or a menu but makes start screen and options dialog looks kind of ugly. xsessionrc, and the whole /etc for it and didn't find anything. I've tried to modificate the launcher inside MenuLibre (I'm using xfce) adding the previously mentioned command to it, "QT_AUTO_SCREEN_SCALE_FACTOR=0 qbittorrent %U export QT_AUTO_SCREEN_SCALE_FACTOR=0 export QT_FONT_DPI=120; Save the changes with Ctrl+O; Close the file with Ctrl+X; Reboot your system and check again. profile, . (forum bug) You are correct, this is caused by Window's DPI scaling. so add this line in your main. Alternatively, an environment variable QT_AUTO_SCREEN_SCALE_FACTOR=1 can be set to enable automatic high-DPI scaling. This attribute must be set before. # Apparently this should be gnome according to Yochanan. Note that the window system may do its own scaling, so this does not guarantee that In my experience, having your QtWidgets-application scale properly on different DPI screens and scale factors requires a few things: (Based on Qt 5. AlexNevskiy. 2 values to be applied to all other commands, your can add. raven-worx Moderators last edited by @hle12. import os. Added cross-platform support for the QT_FONT_DPI environment variable, for the purpose of For the Qt libraries to work correctly, it needs this variable: QT_AUTO_SCREEN_SCALE_FACTOR=1 manually enter "SET QT_AUTO_SCREEN_SCALE_FACTOR=1" and start QLC+. 75 kate, keepassxc, KAddressBook, KTnef, KNotes UI fonts are fine. ” How to fix it? Hi, QT5 application installed or compiled on my system are scaled by the factor 2 but should not be scaled. But it seems that value I put a setter into . However, once packed in an AppImage, the UI elements look all tiny and squished, no scaling to take the high DPI into account was done. Logically enough, it sets the env variable QT_AUTO_SCREEN_SCALE_FACTOR [boolean] enables automatic scaling, based on the monitor's pixel density. 用于在Qt应用程序中启用高DPI缩放的设置。高DPI（高分辨率像素密度）缩放是一种技术，用于在高分辨率显示设备上正确显示应用程序界面。设置了高DPI缩放因子的取整策略为"PassThrough"。这意味着Qt会直接使用系统提供的缩放因子，而不进行额外的处理或调整。通过这个设置，在支持高DPI缩放的设备 I have Anaconda installed on my computer. This won't change the size of point-sized fonts, since point is a physical measurement unit. 3, if you previously used the environment variables QT_AUTO_SCREEN_SCALE_FACTOR or QT_SCALE_FACTOR (described below), unset 而且这种方式，在低版本的QT上面，应该可以通过qputenv("QT_AUTO_SCREEN_SCALE_FACTOR", "1. domain accounts), or want to style the login box as well, then you can set the same 1 In new Creator there is substitution for Enable high DPI scaling mode option . For the Qt libraries to work correctly, it needs this variable: QT_AUTO_SCREEN_SCALE_FACTOR=1 manually enter "SET QT_AUTO_SCREEN_SCALE_FACTOR=1" and start QLC+. 10. 75 and 1) it shrinks the 2 monitors when taking the screenshot, which is weird and very small to see correctly. Actually none of my screens is a hidpi one, but the notebook one has a bit higher pixel density. 5 and 2. 5 , 2 etc ) does the trick for me. QT_SCREEN_SCALE_FACTORS to set per-screen factors. The list can be in one of two formats; either a QT_AUTO_SCREEN_SCALE_FACTOR [boolean] enables automatic scaling, based on the pixel density of the monitor. This is frustrating because I have pyqt Setting the environment variable QT_AUTO_SCREEN_SCALE_FACTOR to TRUE; Using only point-sizes for fonts; If you have to define a size for a widget (no layout to handle it for you), using only realtive units (e. This won't change the size of point-sized fonts, since This property holds the depth scale factor. A Offline. 15 Arch. QT_AUTO_SCREEN_SCALE_FACTOR[boolean]根据显示器的像素密度启用自动缩放。这不会改变点大小字体的大小，因为点是物理度量单位。多个屏幕可能会有不同的比例因子。 qputenv("QT_AUTO_SCREEN_SCALE_FACTOR", "1"); 使用方式：在QApplication声明前调用. The text was updated successfully, but QT_AUTO_SCREEN_SCALE_FACTOR [boolean] enables automatic scaling, based on the monitor's pixel density. g. I had the problem of a tiny UI font in calibre on the Gnome desktop on a 4K 15. Andy3153 Member Registered: 2018-12-24 Posts: 89. 04 and 16. When I start QT applications from gnome the icons are huge. I'm developing an application using qt on laptop with 125% scaling. Text is scaled by Windows automatically, however none of the widgets are aware of this scaling so you see that mess. 6 What works? Scaling is always opt-in QT_SCALE_FACTOR; QT_AUTO_SCREEN_SCALE_FACTOR; integer scale factors officially supported beware the Qt rectangle definition (add 0. apps menu: I recommend you read the Scalability page in the current Qt (4. So it would have to be combined with setting QT_AUTO_SCREEN_SCALE_FACTOR=0. bashrc file. 6, Qt 5 applications can be instructed to honor screen DPI by setting the QT_AUTO_SCREEN_SCALE_FACTOR environment variable: export QT_AUTO_SCREEN_SCALE_FACTOR=1. I've tried QT_AUTO_SCREEN_SCALE_FACTOR and QT_SCALE_FACTOR different values but I don't know why they have no effect too. With Gnome already set to scale by 200%, a try of QT_SCALE_FACTOR=2 resulted in ridiculously large text. I searched web ways to scale application. As for QT_SCREEN_SCALE_FACTORS, it seems to only generate correct results if the first number Hey everyone, I have an issue with QScreen::grabWindow function and it all started after introducing qputenv("QT_AUTO_SCREEN_SCALE_FACTOR", "1") into the project. 02 I added command line options --QT_SCALE_FACTOR and --QT_SCREEN_SCALE_FACTORS for High DPI displays. Replaces QT_AUTO_SCREEN_SCALE_FACTOR (now Instead use: QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen factors. It resizes the size of buttons ( and icons within them ), labels ( and their font With Gnome already set to scale by 200%, a try of QT_SCALE_FACTOR=2 resulted in ridiculously large text. asgnbs ifujk pvzmv jgj etilqc whzi xsjt rarlk efhfdqv jafzjd