Supported Environment Variables in Qt Quick Controls

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

Variable Description
QT_QUICK_CONTROLS_STYLE Specifies the default Qt Quick Controls style. The value can be either one of the built-in styles, for example "Material", or a custom style such as "MyStyle".
QT_QUICK_CONTROLS_FALLBACK_STYLE Specifies a fallback style for custom styles. The value can be one of the built-in styles, for example "Material",
QT_QUICK_CONTROLS_CONF Specifies the location of the Qt Quick Controls configuration file. By default, the configuration file is loaded from the application's resources in ":/qtquickcontrols2.conf".
QT_QUICK_CONTROLS_HOVER_ENABLED Specifies whether Qt Quick Controls use hover effects. The value can be set to 0 or 1 to disable or enable hover effects, respectively.

Imagine style specific environment variables:

Variable Description
QT_QUICK_CONTROLS_IMAGINE_PATH Specifies 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:

Variable Description
QT_QUICK_CONTROLS_MATERIAL_THEME Specifies the default Material theme. The value can be one of the available themes, for example "Dark".
QT_QUICK_CONTROLS_MATERIAL_VARIANT Specifies 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_ACCENT Specifies 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_PRIMARY Specifies 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_FOREGROUND Specifies 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_BACKGROUND Specifies 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:

Variable Description
QT_QUICK_CONTROLS_UNIVERSAL_THEME Specifies the default Universal theme. The value can be one of the available themes, for example "Dark".
QT_QUICK_CONTROLS_UNIVERSAL_ACCENT Specifies 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_FOREGROUND Specifies 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_BACKGROUND Specifies 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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Licensed under the GNU Free Documentation License, Version 1.3.
https://doc.qt.io/qt-6.0/qtquickcontrols2-environment.html