Supported Environment Variables in Qt Quick Controls 2

This page contains a list of all environment variables that Qt Quick Controls 2 supports. The environment variables are primarily meant for testing purposes, but they can also be used to set system-wide defaults.

VariableDescription
QT_QUICK_CONTROLS_STYLESpecifies the default Qt Quick Controls 2 style. The value can be either one of the built-in styles, for example "Material", or the path to a custom style such as ":/mystyle".
QT_QUICK_CONTROLS_FALLBACK_STYLESpecifies a fallback style for custom styles. The value can be one of the built-in styles, for example "Material",
QT_QUICK_CONTROLS_STYLE_PATHSpecifies a list of additional paths that are used to lookup Qt Quick Controls 2 styles. Multiple path entries must be separated by ':' under Unix and ';' under Windows. By default, styles are looked up from $QML2_IMPORT_PATH/QtQuick/Controls.2.
QT_QUICK_CONTROLS_CONFSpecifies the location of the Qt Quick Controls 2 configuration file. By default, the configuration file is loaded from the application's resources in ":/qtquickcontrols2.conf".
QT_QUICK_CONTROLS_HOVER_ENABLEDSpecifies whether Qt Quick Controls 2 use hover effects. The value can be set to 0 or 1 to disable or enable hover effects, respectively.

Imagine style specific environment variables:

VariableDescription
QT_QUICK_CONTROLS_IMAGINE_PATHSpecifies the path to the directory that contains the Imagine style assets. If not specified, the built-in assets are used.

For example, to specify a path to a directory stored in the resource system:

QT_QUICK_CONTROLS_IMAGINE_PATH=:/imagine-assets

To specify a relative path to a local directory:

QT_QUICK_CONTROLS_IMAGINE_PATH=imagine-assets

Note: Due to a technical limitation, the path should not be named "imagine" if it is relative to the qtquickcontrols2.conf file.

Material style specific environment variables:

VariableDescription
QT_QUICK_CONTROLS_MATERIAL_THEMESpecifies the default Material theme. The value can be one of the available themes, for example "Dark".
QT_QUICK_CONTROLS_MATERIAL_VARIANTSpecifies the Material variant. The Material Design has two variants: a normal variant designed for touch devices, and a dense variant for desktop. The dense variant uses smaller sizes for controls and their fonts.

The value can be "Normal" or "Dense".

QT_QUICK_CONTROLS_MATERIAL_ACCENTSpecifies the default Material accent color. The value can be any color, but it is recommended to use one of the pre-defined Material colors, for example "Teal".
QT_QUICK_CONTROLS_MATERIAL_PRIMARYSpecifies the default Material primary color. The value can be any color, but it is recommended to use one of the pre-defined Material colors, for example "BlueGrey".
QT_QUICK_CONTROLS_MATERIAL_FOREGROUNDSpecifies the default Material foreground color. The value can be any color, or one of the pre-defined Material colors, for example "Brown".
QT_QUICK_CONTROLS_MATERIAL_BACKGROUNDSpecifies the default Material background color. The value can be any color, or one of the pre-defined Material colors, for example "Grey".

Universal style specific environment variables:

VariableDescription
QT_QUICK_CONTROLS_UNIVERSAL_THEMESpecifies the default Universal theme. The value can be one of the available themes, for example "Dark".
QT_QUICK_CONTROLS_UNIVERSAL_ACCENTSpecifies the default Universal accent color. The value can be any color, but it is recommended to use one of the pre-defined Universal colors, for example "Violet".
QT_QUICK_CONTROLS_UNIVERSAL_FOREGROUNDSpecifies the default Universal foreground color. The value can be any color, or one of the pre-defined Universal colors, for example "Brown".
QT_QUICK_CONTROLS_UNIVERSAL_BACKGROUNDSpecifies the default Universal background color. The value can be any color, or one of the pre-defined Universal colors, for example "Steel".

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