A QT-based LightDM Greeter that changes background based on time.
- Login with username & password (click on username to type username).
- Background (wallpaper) changes dynamically based on time.
- Wallpaper resizing modes (scaled, zoomed, zoom_filled, centered).
- Remembers last logged in username.
- Supports multipe screens.
- Setting background color (for zoomed and centered)
- Monitor/screen change detection
- Session selection
- Guest account
- Power controls
- Settings UI
- Custom offsets for auth form.
- Qt5 development environment, QtWidgets module is needed (Qt6 will probably work as well).
- CMake
- LightDM
- liblightdm-qt (build only)
cmake .
make
sudo make install
Wallpapers are stored under /usr/share/lightdm-dynamic-greeter/wallpapers path. Each wallpaper collection should be stored in individual folder.
Desired wallpaper's folder name should be used to set wallpaper parameter in configuration file.
- Each wallpaper folder should include 24 files.
- Each file should be named with an integer from 0 to 23 (no zero-padding), where the number represents the hour-clock that the file is displayed.
- If there are not 24 files, symbolic links from other files can be used to save space instead of duplicating files.
| Format | MIME type | Description |
|---|---|---|
| BMP | image/bmp | Windows Bitmap |
| GIF | image/gif | Graphic Interchange Format |
| JPG | image/jpeg | Joint Photographic Experts Group |
| PNG | image/png | Portable Network Graphics |
| PBM | image/x-portable-bitmap | Portable Bitmap |
| PGM | image/x-portable-graymap | Portable Graymap |
| PPM | image/x-portable-pixmap | Portable Pixmap |
| XBM | image/x-xbitmap | X11 Bitmap |
| XPM | image/x-xpixmap | X11 Pixmap |
| SVG | image/svg+xml | Scalable Vector Graphics |
Open /etc/lightdm/lightdm.conf file and under Seat configuration, find the line with greeter-session and update it like this:
greeter-session=lightdm-dynamic-greeter
Configuration file is /etc/lightdm/lightdm-dynamic-greeter.conf and contains the necessary documentation.
- Wallpaper resizing algoritms are taken from https://github.com/l3ib/nitrogen
- How libqtlightdm works is taken from https://github.com/surlykke/qt-lightdm-greeter
There are considerable amount of artwork online that can be used for this project, but I am not comfortable to use them without permission from artists.