Qt 5.9 | Qt Quick Controls 2 | Supported Environment Variables in Qt Quick Controls 2

Qt 5.9.2 Reference Documentation

# 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.

Variable | Description
--- | ---
`QT_QUICK_CONTROLS_STYLE` | Specifies 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_STYLE` | Specifies a fallback style for custom styles. The value can be one of the built-in styles, for example `"Material"`,
`QT_QUICK_CONTROLS_STYLE_PATH` | Specifies 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_CONF` | Specifies 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_ENABLED` | Specifies whether Qt Quick Controls 2 use hover effects. The value can be set to `0` or `1` to disable or enable hover effects, respectively.

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_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"`.

## Related Information

- Styling Qt Quick Controls 2
- Qt Quick Controls 2 Configuration File