QtKnobs is a Qt and QML based Library/Plugin which provides different types of Knobs.

Screenshots:

• Types

  

• Percent View

  

• Minimum & Maximum values

  

• Various Sizes

  

• Customize

  

• size
• value
• minimumValue
• maximumValue
• percent
• readOnly { true, false }
• mode { Knob.Normal, Knob.Percent }
• style { Knob.Pie, Knob.Arc, Knob.Needle }
• pieType { Knob.Flat, Knob.Curve } (when style = Knob.Pie)
• needleType { Knob.Point, Knob.Round, Knob.Groove } (when style = Knob.Needle)
• color (knob color)
• backgroundColor (back dial color)
• foregroundColor (front dial color)
• borderColor
• textColor
• meter { true, false } (simple meter)
• pieMultiColor (some fun)

Qt >= 5.3

• Clone
• Run qmake && make && make install

The compiled plugin (libqtknobsplugin.so on .nix systems) would be in directory imports/QtKnobs with file qmldir.

If you make install then you need not do anything. But just in case if you want it to be included in your application then:

• Copy directory imports to your project location
• To make the engine to search for this module, add the path where the imports directory is using addImportPath.
  For eg. If the directory imports is at location /home/ashish/KnobsTest then,

QQuickView view;
view.engine()->addImportPath("/home/ashish/KnobsTest/imports");
view.show();

• Additionally, to make QtCreator aware of it (and to get rid of the annoying QML module not found during import) add the path in .pro file,

QML_IMPORT_PATH = /home/ashish/KnobsTest/imports

• A simple Knob:

  import QtQuick 2.0
  import QtKnobs 1.0
  Knob {
    value: 25
  }
  

  

  You can find more examples in QtKnobs/examples/main.qml

MIT

Feel free to contact me for any questions at ashishd157 at gmail.com.