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  1. Qt
  2. QTBUG-49374

Adapt Windows style to High DPI

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    • 5c60e4b8f9cc88e48f5e7652eefe90e1366ae23d

    Description

      A lot of the elements of the Windows style (Windows Vista in particular) do not look very good on a High DPI display. I've tested this using Qt 5.6 (from November 10, 2015) on Windows 10. I don't have a High DPI monitor so I'm having the OS simulate a high DPI display by opening the Display control panel, selecting the "set a custom scaling level" link, setting to 200% (or 150%), clicking OK, then clicking Apply, and then logging out and back in.

      Note that I get much better results using this method than by setting the QT_SCALE_FACTOR environment variable to 2. Apparently the Windows style doesn't support scaling, so this isn't surprising.

      In my application, I am making the following call before the QApplication object is constructed:

      QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

      I've attached a screen shot of the qtbase/examples/widgets/styles/styles.pro example using Windows Vista style. Note that before compiling the example, I added the call to QApplication::setAttribute(Qt::AA_EnableHighDpiScaling).

      The screen shot also shows a few other elements I noticed don't look very good but which were not used in the styles example.

      NOTE: I recommend that you download the attached screenshot and view it on Windows at full resolution. Otherwise it's hard to see how pixelated some of the images are.

      Attachments

        1. qtbug49374_96dpi.jpg
          qtbug49374_96dpi.jpg
          75 kB
        2. qtbug49374_gallery.jpg
          qtbug49374_gallery.jpg
          916 kB
        3. qtbug49374_qlineedit.txt
          1 kB
        4. qtbug49374_themedrawing_diag.diff
          3 kB
        5. qtbug49374.zip
          20 kB
        6. screenshot-1.png
          screenshot-1.png
          28 kB
        7. screenshot-2.png
          screenshot-2.png
          298 kB
        8. WindowsVistaStyleIssues.png
          WindowsVistaStyleIssues.png
          178 kB

        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-51981 Windows 7: High DPI, ugly interface

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          is required for

          Task - A task that needs to be done. QTBUG-46615 Implement High DPI scaling v2 (5.6)

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-55644 QToolBar extension button icon is too small on high DPI display

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed

          Task - A task that needs to be done. QTBUG-58611 Qt 6: Use qreal in QtWidgets drawing/styles code

          • Not Evaluated - Not yet evaluated/prioritized
          • Reported

          Task - A task that needs to be done. QTBUG-40277 Adapt styles to High DPI

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-44478 Wrong display of checkboxes on Windows 7 with classic theme and hi DPI

          • P4: Low - Would be nice to fix, but it's not very important.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-49745 Windows: Application look is corrupted after it has been automatically moved to primary screen by Windows when unplugging the monitor

          • P5: Not important - Not relevant and not urgent.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-52452 High DPI painting errors for widgets in scroll area if QT_SCALE_FACTOR is a point number > 1

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-64890 A list of per-monitor high DPI support issues on Windows

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-64708 MDI child window title does not properly scale with high dpi

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-64709 Windows: MDI application leaves an empty area between toolbar and filemenu on high dpi if MDI child menu is visible

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
          replaces

          Bug - A problem which impairs or prevents the functions of the product. QTCREATORBUG-16853 QtCreator widget style on high dpi displays

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
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              anrocha André De La Rocha (Inactive)
              aclight Adam Light
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              Dates

                Created:
                Updated:
                Resolved: