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