Module lightbox 

Lightbox image viewer: full-screen preview with zoom, pan, EXIF details, and keyboard navigation.

Loads preview or original resolution images with pinch-zoom and swipe navigation. Displays an EXIF metadata panel and provides download-to-folder and delete-to-trash actions.

Structs

ActionBar 🔒

Zoom controls, resolution toggle, and download button under the picture.

AssetInfo 🔒

Grid item properties the lightbox renders.

DetailsPane 🔒

Sidebar with the filename, sync summary, and EXIF groups.

Lightbox 🔒

Lightbox page widgets plus the state shared by its signal handlers. Handlers hold strong Rcs, so it lives as long as the page’s widgets.

LightboxHeader 🔒

Navigation page with its header bar (back, prev/next, details toggle).

LocalProbe 🔒

Everything we can learn about a local file off the main thread before handing the data back to GTK. exif is the cached EXIF parse; dims comes from a pixbuf header-only read; mtime_iso falls back when the file has no DateTimeOriginal so we always show some date.

PictureArea 🔒

Two pictures in a sliding stack, their scroller, and the overlay holding the spinner.

PictureLoad 🔒

One request to load an asset into the inactive picture.

UnavailableCard 🔒

“Preview unavailable” card shown over the picture when nothing can be decoded.

Enums

LoadResult 🔒

What a finished load shows; applied only if the user is still on that asset.

Functions

accent_row 🔒

apply_lightbox_zoom 🔒

Apply zoom to a lightbox Picture. Zoom is fit-relative: 1.0 = the size the texture would occupy inside viewer under Contain layout. >1.0 overflows the viewer for panning. Returns the computed content dimensions when zoomed.

build_action_bar 🔒

build_camera_group 🔒

build_details_pane 🔒

build_header 🔒

build_image_group 🔒

build_location_group 🔒

build_picture_area 🔒

build_split_view 🔒

Picture viewer with the details pane as a sidebar that follows the window’s narrow layout.

build_unavailable_card 🔒

build_video_badge 🔒

build_viewer 🔒

build_zoom_group 🔒

crossfade_overlay 🔒

details_scroller 🔒

details_text_label 🔒

drag_export_path 🔒

Hard-link or copy a cached file under its original name so drag-out targets see that name. Returns source if the copy fails, and None when there is no cache directory.

exif_from_local 🔒

Convert local EXIF into the API shape so one renderer handles both sources.

fill_exif_box 🔒

Populate the details sidebar with sectioned EXIF metadata.

format_bytes 🔒

Format a byte count value into a human-readable size string (e.g. KB, MB, GB).

format_camera 🔒

format_datetime_display 🔒

Format an ISO 8601 timestamp for display, converting from UTC to the user’s local timezone.

format_exposure 🔒

format_location 🔒

icon_button 🔒

lightbox_picture 🔒

lightbox_title_cap 🔒

Title length that still fits in the header beside the nav buttons.

local_details_exif 🔒

EXIF for the details pane with gaps filled from the filesystem; None if nothing is known.

open_lightbox 🔒

Construct and present the fullscreen lightbox view for a selected asset.

original_preview_cache_path 🔒

Cache path for a downloaded original; keeps the extension so decoders pick the right format.

probe_local_file 🔒

Metadata, pixel size, and cached EXIF for a local file; does blocking I/O.

systemtime_to_rfc3339 🔒

Local-timezone RFC3339, so format_datetime_display treats it like an EXIF timestamp.

truncate_filename 🔒

Truncate a filename to a maximum character limit, appending an ellipsis if needed.