extension

Extensions

Extensions enable the creation of stylesheets using the same, customizable themes of the original stylesheet. This both allows refining the generated stylesheet and supporting third-party Qt extensions/widgets.

Extensions are optionally added to the generated stylesheets, allowing you to extend existing stylesheets to support third-party extensions and optional features.

Furthermore, this simplifies making local, application-specific changes, without having to deal with merge conflicts when fetching updates.

Pre-Packaged Extensions

Advanced Docking System

This extension adds support for the Advanced Docking System. This comes with styles for the dock manager to create a consistent theme between the main stylesheet and the docking system.

In order to use this extension, configure with:

python configure.py --extensions=advanced-docking-system

And make sure to disable the internal stylesheet in the dock manager.

QDockWidget Tooltips

This extension adds tooltips to QDockWidget's float and close buttons.

In order to use this extension, configure with:

python configure.py --extensions=dock-tooltips

Standard Icons

This extension adds a complete set of standard icons to override the Qt defaults. Please reference standard_icons.py for an example of how to override these icons. These cannot be overwritten solely using a stylesheet, so you must provide your own subclass of QCommonStyle and override the standardIcon method.

In order to use this extension, configure with:

python configure.py --extensions=standard-icons

The following is a 1:1 mapping of the standard icon enumerated name and the icon names:

{
    "SP_TitleBarMinButton": "minimize.svg",
    "SP_TitleBarMenuButton": "menu.svg",
    "SP_TitleBarMaxButton": "maximize.svg",
    "SP_TitleBarCloseButton": "window_close.svg",
    "SP_TitleBarNormalButton": "restore.svg",
    "SP_TitleBarShadeButton": "shade.svg",
    "SP_TitleBarUnshadeButton": "unshade.svg",
    "SP_TitleBarContextHelpButton": "help.svg",
    "SP_MessageBoxInformation": "message_information.svg",
    "SP_MessageBoxWarning": "message_warning.svg",
    "SP_MessageBoxCritical": "message_critical.svg",
    "SP_MessageBoxQuestion": "message_question.svg",
    "SP_DesktopIcon": "desktop.svg",
    "SP_TrashIcon": "trash.svg",
    "SP_ComputerIcon": "computer.svg",
    "SP_DriveFDIcon": "floppy_drive.svg",
    "SP_DriveHDIcon": "hard_drive.svg",
    "SP_DriveCDIcon": "disc_drive.svg",
    "SP_DriveDVDIcon": "disc_drive.svg",
    "SP_DriveNetIcon": "network_drive.svg",
    "SP_DirHomeIcon": "home_directory.svg",
    "SP_DirOpenIcon": "folder_open.svg",
    "SP_DirClosedIcon": "folder.svg",
    "SP_DirIcon": "folder.svg",
    "SP_DirLinkIcon": "folder_link.svg",
    "SP_DirLinkOpenIcon": "folder_open_link.svg",
    "SP_FileIcon": "file.svg",
    "SP_FileLinkIcon": "file_link.svg",
    "SP_FileDialogStart": "file_dialog_start.svg",
    "SP_FileDialogEnd": "file_dialog_end.svg",
    "SP_FileDialogToParent": "up_arrow.svg",
    "SP_FileDialogNewFolder": "folder.svg",
    "SP_FileDialogDetailedView": "file_dialog_detailed.svg",
    "SP_FileDialogInfoView": "file_dialog_info.svg",
    "SP_FileDialogContentsView": "file_dialog_contents.svg",
    "SP_FileDialogListView": "file_dialog_list.svg",
    "SP_FileDialogBack": "left_arrow.svg",
    "SP_DockWidgetCloseButton": "close.svg",
    "SP_ToolBarHorizontalExtensionButton": "horizontal_extension.svg",
    "SP_ToolBarVerticalExtensionButton": "vertical_extension.svg",
    "SP_DialogOkButton": "dialog_ok.svg",
    "SP_DialogCancelButton": "dialog_cancel.svg",
    "SP_DialogHelpButton": "dialog_help.svg",
    "SP_DialogOpenButton": "dialog_open.svg",
    "SP_DialogSaveButton": "dialog_save.svg",
    "SP_DialogCloseButton": "dialog_close.svg",
    "SP_DialogApplyButton": "dialog_apply.svg",
    "SP_DialogResetButton": "dialog_reset.svg",
    "SP_DialogDiscardButton": "dialog_discard.svg",
    "SP_DialogYesButton": "dialog_apply.svg",
    "SP_DialogNoButton": "dialog_no.svg",
    "SP_ArrowUp": "up_arrow.svg",
    "SP_ArrowDown": "down_arrow.svg",
    "SP_ArrowLeft": "left_arrow.svg",
    "SP_ArrowRight": "right_arrow.svg",
    "SP_ArrowBack": "left_arrow.svg",
    "SP_ArrowForward": "right_arrow.svg",
    "SP_CommandLink": "right_arrow.svg",
    "SP_VistaShield": "vista_shield.svg",
    "SP_BrowserReload": "browser_refresh.svg",
    "SP_BrowserStop": "browser_refresh_stop.svg",
    "SP_MediaPlay": "play.svg",
    "SP_MediaStop": "stop.svg",
    "SP_MediaPause": "pause.svg",
    "SP_MediaSkipForward": "skip_backward.svg",
    "SP_MediaSkipBackward": "skip_forward.svg",
    "SP_MediaSeekForward": "seek_forward.svg",
    "SP_MediaSeekBackward": "seek_backward.svg",
    "SP_MediaVolume": "volume.svg",
    "SP_MediaVolumeMuted": "volume_muted.svg",
    "SP_LineEditClearButton": "clear_text.svg",
    "SP_DialogYesToAllButton": "dialog_yes_to_all.svg",
    "SP_DialogNoToAllButton": "dialog_no.svg",
    "SP_DialogSaveAllButton": "dialog_save_all.svg",
    "SP_DialogAbortButton": "dialog_cancel.svg",
    "SP_DialogRetryButton": "dialog_retry.svg",
    "SP_DialogIgnoreButton": "dialog_ignore.svg",
    "SP_RestoreDefaultsButton": "restore_defaults.svg",
    // NOTE: Only available in Qt 6.3+
    "SP_TabCloseButton": "tab_close.svg"
}

Creating Extensions

Creating extensions extends the existing stylesheet configurations, and adds custom rules to the stylesheet, which can then be configured for all themes. This supports custom icons, rules, and more.

Each extension is added as a folder in extension, with a template stylesheet file named stylesheet.qss.in. Additional icons can be added as SVG template files (with the extension svg.in), and icon styling rules in icons.json.

Simple Example

For example, to add tooltips to a QDockWidget, create a stylesheet.qss.in in the directory extension/tooltips with the following contents:

QAbstractButton#qt_dockwidget_closebutton
{
    qproperty-toolTip: "Close";
}

QAbstractButton#qt_dockwidget_floatbutton
{
    qproperty-toolTip: "Detach";
}

To build the stylesheet with the extension, run:

python configure.py --extensions=tooltips

Icons Example

For a more complex example, let's consider a third-party extension of a QPushButton with the object name customButton, which has a configurable icon. First, create a directory named extension/custom-button.

Next, let's create an SVG template for the icon, at icon.svg.in:

<svg width="405" height="290">
  <g transform="scale(5)">
    <rect fill="^0^" x="36" width="3" height="17"/>
    <rect fill="^0^" x="66" y="29.75" height="2" width="15"/>
  </g>
</svg>

Here, ^0^ signifies index-based replacement, so we must define an entry in icons.json to specify how we should do the replacement.

{
    "icon": {
        "default": ["foreground"],
        "hover": ["highlight"]
    }
}

Index-based replacement allows us to create more than 1 icon from a single template, with different colors. Here, this would create icon.svg with the theme's foreground color, and icon_hover.svg with the theme's highlight color.

Next, we want to add the rules to use these icons in the stylesheet:

QPushButton#customButton
{
    qproperty-icon: url(:/dark/icon.svg);
}

QPushButton#customButton:hover
{
    qproperty-icon: url(:/dark/icon_hover.svg);
}

To build the stylesheet with the extension, run:

python configure.py --extensions=custom-button