Qt window scaling. Font size are getting increased.

Qt window scaling I only use the information from QScreen to show my main windows in a reasonable initial default size, centered on the screen. Jul 10, 2019 · This did not fix the issue. Window flag, all works fine with the high DPI, but several other side effects appear, e. Eg. 12. Nov 18, 2021 · Last week I created another simple app on Windows and noticed that window resizing happens rather slowly. For Qt Creator application, you can create a "QT_SCALE_FACTOR_ROUNDING_POLICY" environment variable, and set it to "PassThrough". I am working on Windows, so the caveats regarding Wayland and macOS don't apply. width(), self. just want to get the effect of uniform scaling keeping aspect ratio like the image my goal is to make my UI the most accessibility possible so when user resizes window it will act somehow a magnifier layouts is ok for keeping widgets in position. Scaling is implemented for the QtQuick and QtWidgets stacks, as well as general support in QtGui and the Cocoa platform plugin. Now the Apr 15, 2021 · I am using PyQt5 app on few different PC - I noticed that when in Windows: "Desktop" -> "Display settings" -> "Scale and layout" -> "Change the size of text, apps and other items" In Qt 5. On Windows, in QT apps with fractional scaling, their ui elements are still very sharp. Green - font is as it should be. ratio y: root. Apr 11, 2018 · Would would be really nice is to to be able to scale between the minimumSize and maximumSize depending on the overall size of the Application window: at low-res 1024x768, the buttons may reduce to 32x32px whereas from 1920x1080 the buttons increase to 64x64px. so add this line in your main. 4 PyQt5-Qt5 5. Edit #2: both of them are using the Nvidia proprietary driver versi Oct 15, 2020 · I have also noticed, that this change affects other Qt programs, as the Maintenance tool and QtLinguist. 0 but rather 1. Mar 1, 2018 · In order to get an application designed for low DPI values running on a high resolution monitors quickly, consider one of the scaling options (let the application run as DPI Unaware on Windows or set the environment variable QT_AUTO_SCREEN_SCALE_FACTOR to "1". The OS scales window, event, and desktop geometry. Users choose a scaling factor from the Control Panel or via the context menu. Jul 11, 2024 · I developed my GUI using Qt designer 5. High Resolution Screen - QtDesigner Lower Resolution Screen - QtDesigner Feb 5, 2018 · Two secondary monitors scale 100% at 1920x1080 resolution. 2. Aug 16, 2010 · 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 don't run on Windows so can't test this, but I've seen a post in the past where a user was setting those QT Mar 6, 2012 · Found this question when needing to scaling my window using Qt5. conf file to your application directory that contains the following: I've been writing a sample application but I'm not done with it. width / 1920 readonly property real x_CenterGauge: 202 readonly property real y_CenterGauge: 489 Image { x: root. On startup the QGuiApplication get a font with a pixel-size that somehow reflects the scaling of the primary screen. For C++ users, look here: Nov 25, 2014 · The window and image widget can be resized to the image's original size with this code: label->resize (w, h); // change to original size label->setMinimumSize (w, h); // prevent it from collapsing to zero immediately window->adjustSize (); // resize the window label->setMinimumSize (0, 0); // allow shrinking afterwards Configuring Windows. I thought something is wrong with my application, but the same happens with a very simple Qt examples, like Group Box Example. However as you can see it does not keep the PyQt Window scaling, I do not know how to make the Figure size coincide with my Window size. 9. It works fine when you make the window Oct 18, 2021 · That works fine. 4, the level can be specified by passing a parameter to the platform plugin (see Using qt. I would like to have the right most button move closer to the edge of the window when dragging it from image In the new approach, the operating system provides Qt with a scaling ratio that is used to scale graphics output: allocate larger buffers and set a scaling transform. The font size of all other installed programs is unchanged. The Qt platform plugins round the reported scale factors to the nearest integer. Ask Question Asked 7 years, 5 months ago. For the same example, if DPI setting is 150%, set QT_SCALE_FACTOR with value 1. The mouse work but the cursor isn't displayed. ) Jan 13, 2021 · For example, if I remove the Qt. C Offline. All in all, if you drag a window between screens, Qt apps should handle it mostly fine. If you don't want Mudlet's gui to scale at all, Mudlet is built using Qt tolkit, so disabling (or tweaking) scaling in Qt will directly affect Mudlet. 1 on Windows 11 with resolution 1366 x 768(maximum) and scaling 100%(recommended). There are 2 inaccuracies. PC they don't make any difference, but on a PC with for example 200% screen scaling they will make Qt render its widgets as if the screen still had a 100% screen scaling. On most windowing systems this is the state achieved by clicking the maximize button on the toolbar. Jun 8, 2016 · You're reading the current pixmap from the widget, scaling it, and then writing the scaled pixmap to the widget. The screenshot of the accepted answer clearly shows a QMainWindow, which can not have a layout set (it has its own internal layout that, other than the central widget, also manages the menu bar, the status bar, and any possible tool bar or dock widget); in fact, any attempt to set a layout in Designer for the main window will actually result in setting it for the Aug 4, 2020 · 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. Nov 18, 2016 · when i resize my mainwindow to 900x750 (aka 75%) i want to have my qframe at 300,225 size but also maintain that its in the "middle" of the screen relative to the main window size, and also have the child widgets of qframe auto resize to 75% and have them in the same position relative to qframe. Mar 26, 2019 · The problem is that the coordinates of the window are not set correctly. 6. 6, turns off all scaling. Give Me a Qt Quick Fix for High-DPI Displays Already! Sure, rewriting that 'Version One' Qt GUI with scalable layouts Nov 27, 2020 · Disable auto scaling by Qt::AA_DisableHighDpiScaling. Jul 9, 2023 · def setCurrentImage(self, new_image): self. In order not to accumulate scaling errors, the original size values are saved in a dynamic property associated with each widget. horizontalAdvance is really too wide (I use it to draw a selection rectangle around May 27, 2020 · The only way I know of to handle that is to use an API to get the DPI of the source and destination monitors and use that as a scaling factor so that when its geometry/location changes to the other monitor the resize() method gets called to set it accordingly. 5. Qt library 5. Sep 23, 2017 · Simply tell windows that your application is dpi-unaware and Windows will scale the application window so it looks normal on high-dpi displays that have fonts scaled. On the contrary, using height() and width() seems to not take into account the pixels used in the border/menu area. Since sync events (from WM) should be sent consistently, next after previous: Mar 24, 2017 · Hi all, I'm new here and very excited to join you guys, i wanted to know if there is a way to scale or set aspect ratios to scale my window with different sc May 24, 2016 · Try to switch QApplication::setAttribute(Qt::AA_DisableHighDpiScaling); and see how the manual scaling works (I had only tested on Windows, but it based on the recieved user feedback, that seems to work on Mac machines with Retina display as well). . Jan 6, 2016 · I have a main window which contains a main widget, to which a vertical layout is set. % widgets alignments getting collapsed. Notable exceptions are OpenGL and code that works with raster graphics. Window flag. Aug 31, 2015 · Since it will round the user DPI setting. Aug 29, 2014 · 1# Create new UI form base on QWidget: File -> New file or project -> Qt -> Qt Designer form class -> select Widget form templates, next, next, select project and finish . Rectangle { id: root visible: true color: "black" property real ratio: root. 2. May 18, 2022 · In Qt 6 you can override the scale factor with the QT_SCALE_FACTOR env variable, but there is a problem: it doesn't set the factor to your value, it multiplies it. 1 or System-DPI Aware on older versions of Windows. Mar 24, 2023 · I am wondering if I am missing something in setting up Qt high DPI scaling. – Dec 23, 2019 · Applications which set Qt::AA_EnableHighDpiScaling use the DPI of the monitor the window is on to calculate an additional scaling factor. Is there a way to force a new size for the Nov 5, 2014 · On my development PC where I've laid out my windows etc, everything looks proper. Jul 1, 2021 · As I understand setting AA_EnableHighDpiScaling flag Enables high-DPI scaling in Qt on supported platforms (see also High DPI Displays). But on the deploy PC (which has same settings and same installed fonts) some of my windows are all crowded, with buttons, tabs, drop-down contents all crowded or overflowing. For this particular simple app I have only 1 widget in main window but this widget is big QTableView with custom colors that are choosen with not Apr 9, 2020 · Hi, I've got two reports of window corruption that goes away when scaling is totally disabled (screenshots below). imageChangedSignal. root. For example, if the system has 150% and you want 100%, you need to set QT_SCALE_FACTOR to 0. resize(w,h) # Programatically restore the window geometry prior to the load to avoid Jul 20, 2024 · If i reduce windows scaling to 100% then the preview text seems to look the same as the design view, but then my whole system is so small I can't see anything. 2# Add Vertical layout from left bar. Enabling makes Qt scale the main (device independent) coordinate system according to display scale factors provided by the operating system. g I can no longer find my window onto the taskbar, nor restore it after a minimize. I installed everything in the PyCharm IDE, using terminal and pip install. 2 PyQtWebEngine 5. For this particular simple app I have only 1 widget in main window but this widget is big QTableView with custom colors that are choosen with not Nov 18, 2021 · Whatever I create in PyQt scales very slowly. Which means 16px. Welcome to Microsoft Community. 13. Jun 15, 2017 · Qt 5 scaling entire windows. Windows 10 or 11. What are other ways to disable DPI Scaling on QT compiled applications? Because I am trying to disable the DPI Scaling on it. Note that the window system may do its own scaling, so this does not guarantee that QPaintDevice::devicePixelRatio() will be equal to 1. Qt layouts take care of the rest. emit() # This loads the picture and displays it, unfortunately resizing the window self. Note: windowHandle() return the QWindow pointer of a widget but it is always null until the window has been showed. This means in order for your programs to scale properly you have to implement high DPI scaling in your program. Configuring Windows. So, i recomend you to connect the signal while Dec 26, 2016 · If I move the window to monitors set at different scaling values, the size of the content in the window fluctuate significantly. 2) linked to Windows scaling. Mar 2, 2022 · Whenever I run my QT application the application window always shows up on the left hand monitor. Put that in exactly the correct spot with the include at the top and the window is still radically changing. Which is why your label uses 16px font in both cases. If you manually set the screen factor, it is important to set QT_AUTO_SCREEN_SCALE_FACTOR=0 and QT_ENABLE_HIGHDPI_SCALING=0 otherwise some applications which explicitly force high DPI enabling get scaled twice. qt. 1 Reply Last reply . Nov 3, 2021 · Correct, but as you can see that value doesn't tell what scaling is set up on Windows. This attribute must be set before. I have several problems on my Qt application (developped with Qt 5. NOTE as I said above, I implemented my own form header, it's the reason why I still can move my window despite of removing the Qt. However, Qt doesn't properly respond when a display changes scale factor (like switching from laptop-only to external-only, or changing the scale factor of a monitor for testing), because Qt only checks for scale factor changes when the screen ID changes. Nov 17, 2022 · Is it possible to disable the DPI scaling for qt windows independently? My application should still scale, but only select windows should not scale so that i always render them at the specified pixel resolution no matter which screen i move it to. Windows will then upscale my widgets so that they look similar to other non-Qt windows on the screen. 666667 (and even then it might not end up exactly 1. So I wanted to disable it for testing, like documented here. A better method is to scale items based on the height of the default font. For example, I'm at 125% on my conputer and lines in table are too high, tabs in QTabWidget are also too high, but the main problem for me is that QFontMetrics. This has the benefit of letting Qt scale the window correctly and without blurriness or pixelation on the primary monitor and to let Windows scale it on monitor changes. The better fix is to tell Qt to scale to the primary monitor's DPI setting and run the process in system-aware DPI mode instead of per-monitor-aware DPI mode. Modified 7 years, 5 months ago. 1. Windows DPI setting be 150%, the result will be 200% for font and size, while 125% will be 100%. 2, Windows 10). argv += ['--style', 'fusion'] app = QGuiApplication(sys. 3 in C++, using Qt Creator. See full list on doc. But, as always, there is a list of issues: The problem is observed when the window is being resizing too fast. I tried it, and the scaling is indeed improved a bit. Viewed 206 times 1 So I have a product presentation tommorow Jan 28, 2020 · The Qt::AA_DisableHighDpiScaling application attribute, introduced in Qt 5. To the layout is added a QTableWidget only (for the moment). 2 Jan 28, 2020 · The Qt::AA_DisableHighDpiScaling application attribute, introduced in Qt 5. py and ran into the following issue. QWindow::Maximized: 4: The window occupies one entire screen, and the titlebar is still visible. A bit of background. This would be massively helpful on tablets/phones where the resolutions also vary wildly. Mar 4, 2019 · Hello! I have a problem with the Windows scale (Configuration->Screen->change text size (100%)). As of Qt 5. This works by making the functions for querying the system metrics return different values for standard font sizes, sizes of window borders, and so on. Just in case I have checked the display settings of Windows and the scale is at 100%, where it was. 75 on that screen. That would result in bars of empty space at the top and bottom (or left Scale 100% DPI - 96; DPR - 1; PDPI - 96; Scale 125% DPI - 120; DPR - 1; PDPI - 96; Scale 150% DPI - 144; DPR - 1; PDPI - 96; I am running this program on a standard display where physical dpi is 96. wrote on last edited by #7. 4. It's also worth noting that Qt also behaves May 11, 2017 · 3480x2160 Screen (100% Scaling according to Windows Scale and Layout) 1920x1080 Screen (100% Scaling according to Windows Scale and Layout) I also noticed that Qt Designer itself has a similar problem when transitioning to a different screen resolution (see images attached). It sounds like you’re running into a common issue with high DPI scaling in Qt applications. Gee, thanks. 8 PyQt5 5. Feb 18, 2021 · The problem is Qt automatically round up your 250% scaling to 300%. 1 Reply Last reply Reply Quote 0 Dec 15, 2022 · I'm porting a project from Qt5 to Qt6, and have issues with the changed high DPI scaling behavior. I have set both QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling) and QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps) so the whole application and pixel images are scaled correctly. environ["QT_AUTO_SCREEN_SCALE_FACTOR"] = "1" sys. You can find details in this question: Qt Creator "too big" on 3840x2160 and 150% scaling on Windows 10. I developed my program based on 100% scaling on windows. Nov 21, 2022 · For my 4K display logicalDotsPerInchY yields 144 and 144/96 is 1. 0. Scaling. Apr 21, 2021 · You'll then need to restart WSL for the changes to take effect (wsl --shutdown from an elevated command prompt or powershell on Windows). Legend: Red - huge font, should be reset. This variable was deprecated in Qt 5. As yet I'm unsure what they might have in common as an underlying cause. Feb 4, 2022 · Hello, I made the following observation with my Qt application itom (Qt5. Jun 5, 2019 · I used: setFixedSize(size()); to stop the window from resizing, but the resize arrows still appear when the mouse is over the border of the window. As I didn't have problems before I suspect that problem lies in application code itself. This attribute takes priority over Qt::AA_EnableHighDpiScaling. Jan 6, 2020 · I am using a 4K monitor and I am hoping the text can be scaled by windows setting, but that doesn't seem to be the case. scaled(w,h,Qt::KeepAspectRatio)); There are two places where you should add this code: Nov 8, 2021 · Turns out to be a pretty easy solution, which makes me feel kind of stupid. The window is reduced to an entry or icon on the task bar, dock, task list or desktop, depending on how the windowing system handles minimized windows. 4 PyQtWEbengine-Qt5 5. conf): <application> -platform windows:dpiawareness=0,1,2 Because the DPI is very high, text and graphics become too small. So I get defferent display with QT Creator and QT Design Studio. This is intended for applications that require actual window system coordinates, regardless of environment variables. Just add a qt. QImage small = jpgImage->scaled(size()); works so much better than the proposed solution, as size() takes only in account the usable area. Windows defines severalDPI Awareness levels, which applications set in order to opt-in to high-DPI featuers Nov 27, 2024 · A regression was introduced when fixing undesired zero values in the Window Scaling graph. If the sizeHint() is less than (200, 100) and the size policy is expanding, the window will be at least (200, 100). Feb 18, 2019 · In testing it is the property scale that seems to be a problem By modifying width and height instead it solves the problem. Qt creator 4. currentImage = new_image w, h = self. May 16, 2017 · A: Qt uses qreal in the API, and will allow setting non-integer scale factors via QT_SCALE_FACTOR. It can be 1-2 seconds. When I start the application and call show on the main_window, only part of the QTableWidget is shown. In addition, scale factors set by QT_SCALE_FACTOR will not be affected. Thanks. Jul 2, 2020 · In the example code that I've pasted below, I've got a small PyQt5 window with a menu bar, status bar, and a couple of widgets in the centre. 2 and Python 3. With default resolution and scaling (100%) ,widget alignments are good. Nov 1, 2020 · Put this in your setup code before creating the QGuiApplication, to support High DPI scaling on Windows: os. Therefore, the window is moved incorrectly and errors appear: QWindowsWindow::setGeometry: Unable to set geometry 400x400+ Nov 21, 2022 · So there's an application that has DPI Scaling. Jan 23, 2020 · setFixedSize(600, 300); Then run the app in recommended resolution in my resolution settings to get the expected window sizes. 4, there was an experimental implementation of high DPI scaling introduced via the QT_DEVICE_PIXEL_RATIO environment variable, that you could set to a numerical scale factor or auto. I am going through Qt sources to find where the font size is set, but no luck (so far). Windows and other OS use custom scaling to scale things up. Now, if I close the app window, lower the resolution of my machine in Windows and run the app. You can also bind to the absolute minimum width of the layout by using gridLayout. The maximum size of a window is 2/3 of the screen's width and height. Jan 5, 2020 · I have developed a desktop application using Qt creator. Last week I created another simple app on Windows and noticed that window resizing happens rather slowly. If I change scale to 125, 150. Consider what happens if the widget becomes very small and is then resized to something much larger -- you'll get a lot of artifacts due to the scaling transformation used. There is just a point where it switches from one to two - and there the resolution of the screen is halfed. The Cocoa platform plugin sets the scaling ratio as QWindow::devicePixelRatio() or QScreen::devicePixelRatio(), as well as on the backing store. 3# After that click right somewhere on UI form, where is not just added layout, "Lay out" -> "Lay out in a grid" Configuring Windows. like horizontal resizeable, vertical resizeable properties in java swing application. exe on the first (and primary) monitor works, as intended. It allows different scaling values for the x and y axes, and allows the scale to be relative to an arbitrary point. 14. 9 mm = N pixels on my screen. From Qt docs: Applications mostly work with device independent pixels. i like to use them. Fix #20250 (closed) Yeah I've seen reports on the BMD forum that this has stopped working in 17. Sep 12, 2021 · TLDR: QT Designer won't let me move and resize widgets while respecting window scaling. I tried adding this to main. On OS X platforms, there is native support for High-DPI. Then the result will be exactly 150% May 18, 2022 · Disables high-DPI scaling in Qt, exposing window system coordinates. Qt uses the Windows display scale settings automatically; no specific settings are required. minimumWidth, as described in the docs. height() # Save previous window geometry self. Two lies below must be added after import section. If you want to set your Width and Height based on different Resoultions, i would go ahead and have a main-resolution, design your ui based on this resolution and calculate an multiplier for width and height: Jul 8, 2021 · The Reason that adjustSize doesn't work for you is sizeHint(), For windows, the screen size is also taken into account. I am working in Windows 10. Jan 25, 2018 · Also, I would probably go for a "relative" center point rather than absolute, then calculate the absolute from the relative and window size, so that the absolute center point changes when the window size changes, so you can keep things centered as the window size changes too, something you currently don't have. 8. – Apr 26, 2022 · QT Design Studio itself works correctly with high DPI scaling, but the output window doesn't. This issue is only in Windows desktop, not other game. But, Qt creator becomes blurry, apparently because Windows applies raster scaling to it. python; qt; user-interface; QT_AUTO_SCREEN_SCALE_FACTOR=2 qt-5 Aug 9, 2018 · Since a frameless window in Qt gets its scaling factor from the window that created it, the trick is to create another window (that has a titlebar but is not visible to the user) and create the frameless window there, and then add code to the frameless window to keep the hidden window positioned underneath it as the user drags it. Aug 22, 2019 · Normally when you drag a window between screens in this scenario the window size changes automatically just as it pops onto the new screen. Running nvim-qt. However, Qt does not guarantee that graphics and styles will be glitch-free in that case. The right way to do correct DPI scaling is set environment variable QT_SCALE_FACTOR. Qt uses the Windows display scale settings automatically; no spesific settings are required. y_CenterGauge * root. Apr 4, 2016 · So easy, in fact, that the lack of documentation on the subject and complete absence of examples should be no deterrent to a Qt developer looking to create a layout capable of automatic scaling with Windows fonts. Jun 19, 2019 · However, because text at this resolution is so horrific, I've reduced the resolution to 1920 x 1080 (rather than scaling, that causes other more severe issues with other applications). but i could not find a way to scale them up or down while resizing window Nov 18, 2021 · @SGaist said in Window scaling very slow: Hi, Which version of Qt ? How did you install it ? Which version of Python ? What are you machine spécifications ? Hello! Here is the info. argv) The font scaling ends up a little bit different, but that is acceptable for my use case. In the background, the application was started when a 4k monitor is defined as the main screen (scaling 125%). I can see that the app window appears big. Font size are getting increased. Apr 13, 2022 · I've been trying to use QT Designer to make some python GUI. Not sure if that's an issue with the Windows version, e. Plasma sets QT_SCREEN_SCALE_FACTORS in the environment for manual specification of per-monitor scale, which combined with the automatic scaling may result in double scaling. I want it to keep the size ratio of the image that it is displaying no matter how stretched out it is. Christian Ehrlicher Lifetime Qt Champion. 5 which corresponds to my Windows setting of 150% scaling. I want it to be as small as it appeared in previous resolution settings. But I don't see any effect, no matter if I set QT_ENABLE_HIGHDPI_SCALING to 0 or 1. 1. Starting and running nvim-qt. Aug 18, 2024 · Hello, 以恒陈. ratio width: implicitWidth Jun 13, 2015 · Currently Basic sync is used and implemented in Qt, but still need to synchronize the window updates (from timer) with resizing events from Windows Manager. Sep 1, 2018 · 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. cpp Nov 18, 2021 · @SGaist said in Window scaling very slow: Hi, Which version of Qt ? How did you install it ? Which version of Python ? What are you machine spécifications ? Hello! Here is the info. In the new approach, the operating system provides Qt with a scaling ratio that is used to scale graphics output: allocate larger buffers and set a scaling transform. Python 3. 85 but then i still have the preview text is bigger in button etc problem. and pick one that has a screen resolution of 1920x1080 and a 100 Apr 29, 2019 · The screenchanged signal is emitted when your widget moves out of actual screen to another one, so you can implement a logic to resize your buttons depending of size of window. For example, if a display is configured for 175% scale then Qt apps will see a device pixel ratio of 1. Apr 23, 2013 · wide scaling or more dynamic and applied to an individual form (in response to ctrl/+ and ctrl/- like most browsers). For this particular simple app I have only 1 widget in main window but this widget is big QTableView with custom colors that are choosen with not Jun 23, 2014 · Windows does not perform any scaling at all. Is there a better way to disable window resizin I'm using PyQt5 v5. Sep 1, 2011 · I understand that in Qt4, there is no single flag you can set to have the mouse driven resizing of the window maintain a certain aspect ratio (say, 1:1). Unfortunately, QtCreator does the following weirdy: Whereas scaling affects the size of the menu icons as well as things like TreeView icons in the Projects. ui file to . I am on Windows 10 using Qt 6. In the following image you can see two screenshots. Jul 30, 2012 · This will not let the app window scale smaller than the controls it contains (as implicit layout's width and height is equal to the sum of contained items implicit widths and heights). The "QT_SCALE_FACTOR" was the one Apr 4, 2016 · So easy, in fact, that the lack of documentation on the subject and complete absence of examples should be no deterrent to a Qt developer looking to create a layout capable of automatic scaling with Windows fonts. When I use windows scaling (200% instead of 100%) because in native 100% elements are too small on my remote screen due to his resolution, the mouse disappears after randomly few seconds. 0001). It is interesting that, just because the scale is 150%, Qt is bumping the DPR to 2 where my actual machine is a standard machine and NOT a high DPI Aug 22, 2018 · you have: setFontSize(16). Styles may break first: the fusion style is generally most scalable. QT is open source, why can't the Windows scaling code be used on Linux? Also, here is a comparison. Layout. The QVBoxLayout should now stretch to fit the window and will resize automatically when the entire window is resized. Give Me a Qt Quick Fix for High-DPI Displays Already! Sure, rewriting that 'Version One' Qt GUI with scalable layouts Microsoft Windows. g. Jul 20, 2024 · If i reduce windows scaling to 100% then the preview text seems to look the same as the design view, but then my whole system is so small I can't see anything. When I run my GUI on a computer with 125% or 150% scaling, the font no longer fits within my label boxes, but the rest of the GUI elements are exactly as I set them. Anyway, if you know that the size of a dime is 17. All was going well until I converted the . Aug 31, 2016 · Is there a matplotlib+Pyqt fix or do I have fiddle around somewhere in Windows settings? Thanks. This is important if you want to have a pixel perfect visualization of certain things. Viewed 206 times 1 So I have a product presentation tommorow May 28, 2024 · @jsulm hi, i dont have problems using layouts. exe on either of the secondary monitors, or moving the window from the first to either of the secondary monitors, introduces scaling artifacts. Supported platforms are X11, Windows and Android. How to fix this issue. Jan 6, 2012 · What I want is, when user clicks on maximize button or resizes main window then tab control size as well as its component locations should be auto updated. Did you try using scaling on the Windows side (settings -> System -> Display) this will scale your Linux application as well, although at the moment WSLg only support integer scale (100%, 200%, fractional scaling like 150% is currently disabled by default. However on windows with different DPI the font in the menu changes in non-obvious ways. Sep 17, 2020 · I am using Windows 10 and Qt 5. Apr 26, 2022 · QT Design Studio itself works correctly with high DPI scaling, but the output window doesn't. QT_SCALE_FACTOR scales fonts, but QT_SCREEN_SCALE_FACTORS may not scale fonts, depending on the application. io May 18, 2022 · Disables high-DPI scaling in Qt, exposing window system coordinates. On a Windows setup with the DPI setting set at 100% and text size (Settings -> Ease of access -> 'Make text bigger') set 100, all is well, and looks like this: Oct 16, 2022 · Another possible work-around that you could do at the Qt level is to react to a resizeEvent() by calculating the largest 16:9 sub-rectangle that will fit inside the new window-size, and layout your content to fit inside that rectangle instead of filling the entire window. I haven't hard-coded any resizing handlers or anything, so I'm at a loss as to what is causing there to be such a disparity between the behavior of the preview versus the running program. When I move my QML application window from a low DPI screen (100% scale) to a high DPI (125% scale) screen, the window scales up (resizes) to use more pixels, as Jan 1, 2013 · I made a class called ImageLabel which extends QLabel. You can scale the pixmap by keeping its aspect ratio every time it changes: QPixmap p; // load pixmap // get label dimensions int w = label->width(); int h = label->height(); // set a scaled pixmap to a w x h window keeping its aspect ratio label->setPixmap(p. For application wide scaling, the scaling is applied after each ui file is loaded or widget created. Aug 17, 2021 · On my dev. In QT Designer the window looks great when I preview it: However when I try to run the python script I generated, I see the following: Dragging the window larger doesn't fix the problem: Aug 5, 2014 · Scaling items based on the width and height of the screen works well enough, except when you move to a high DPI device. The advantage of this approach is that that vector graphics and fonts scale automatically and existing applications tend to work unmodified. cpp: @ QFont newFont("Seqoe UI", 10, QFont:::Normal, false); Apr 20, 2017 · @mrjj thanks for suggestion. Example: Screen #1 is set to 200% font scaling Screen #2 is set to 100% font scaling Jan 19, 2017 · My assumption on why the dpi scaling does not work is because you use OpenGL widget as your viewport. x_CenterGauge * root. When I use my Python application with this GUI with fixed window size 1366, 768 on a different computer with resolution 1900 x 1080(maximum) and scaling 150%(recommended) the GUI contents shrink in size and the texts become scaled out of size and overlap on other widgets. On X11/Windows/Android, there are two methods to enable high-DPI detection per the blog post: Set an environment variable; Setting an attribute in the program source code; Setting QT_AUTO_SCREEN_SCALE_FACTOR=1 in your system environment variables will fix the scaling issue. This is with either the global scale in settings, or just setting QT_SCALE_FACTOR manually. These options may incur some scaling or painting artifacts, though. May 18, 2022 · Disables high-DPI scaling in Qt, exposing window system coordinates. 100% -> pointSize = 8; 125% -> pointSize = 9; 150% -> pointSize = 9 (so I was not able to fit some linear function). Also, when I created a browser and ran a php-based image galleryon it The Scale type provides a way to scale an Item through a scale-type transform. If i use batch script i can get Qt Creator and Qt Design studio to a reasonable size with set QT_SCALE_FACTOR=0. When I install my app in a laptop (which has this value in 125%) my widgets cut the texts. Mar 19, 2014 · Hey, just set the scale property of your top-level component, it will automatically scale its children. However if you move() the window programmatically this doesn't occur and the window size ends up being crazy. The behavior you’re describing—where the window only returns to normal after interacting with another application—suggests a problem with how the window is being rendered or updated when DPI scaling changes. 15. This corresponds to setting the QT_AUTO_SCREEN _SCALE_FACTOR environment variable to 1. Windows defines severalDPI Awareness levels, which applications set in order to opt-in to high-DPI features Sep 17, 2022 · Supported platforms are X11, Windows and Android. Right now I have a problem on two displays with 100% and 200% scaling. Jun 2, 2022 · Since my previous question here at StackOverflow I was able to make my plot touch the edges of my Figure:. And the regular Windows settings method "Overriding DPI Scale" doesn't work on it. And yes, using this to scale the default font size for the whole QApplication does the trick. What I mean is, when I resize the application window, its contents refresh to the new size with a significant delay. 9 mm and you show the user a picture of a dime, then let them zoom in/out until the picture matches the physical dime's, it basically says: 17. Using QSizePolicy::Ignored for both hor/vert in contentLabel->setSizePolicy make the window not resize to fit the image label, so the image can scale up outside the widget bounds. This gives more control over item scaling than the scale property. Also it states that : Qt applications by default are Per-Monitor DPI Aware on Windows 8. However on KDE, QT app controls are blurry. 2 Jul 20, 2024 · If i reduce windows scaling to 100% then the preview text seems to look the same as the design view, but then my whole system is so small I can't see anything. yqbwmd wzr vck fmdq zii jurxw efxfm yffhn uqo tql