feat: add per-image home screen widget button - #81
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📝 WalkthroughWalkthroughThe change adds image-based Android home-screen widgets. It stores widget-to-image mappings, registers and renders ChangesImage widget support
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🟡 Moderate · up to The PR adds per-image home-screen widgets, but a retry-path error can prevent widgets from starting, while image ordering, missing-file recovery, and stale pending-image cleanup can produce incorrect or incomplete widget behavior. These bounded correctness and availability issues should be addressed before merging. Sequence Diagram(s)sequenceDiagram
participant FullscreenScreen
participant add_home_screen_widget
participant AndroidHomeScreen
participant ImageWidgetProvider
participant PythonActivity
participant ImageDatabase
FullscreenScreen->>add_home_screen_widget: pass current image path
add_home_screen_widget->>AndroidHomeScreen: request selected widget provider
AndroidHomeScreen->>ImageWidgetProvider: create widget
ImageWidgetProvider->>ImageDatabase: resolve widget image
ImageWidgetProvider->>AndroidHomeScreen: render image or placeholder
AndroidHomeScreen->>PythonActivity: send widget click action
PythonActivity->>ImageDatabase: assign imported image to widget
PythonActivity->>ImageWidgetProvider: request widget refresh
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 13.73% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 51 functions across 9 files. (1 skipped: 1 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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Actionable comments posted: 2
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Inline comments:
In `@app_src/utils/android.py`:
- Around line 34-36: Update add_home_screen_widget() to validate that a
non-empty image_path exists before choosing ImageWidgetProvider or requesting
the widget pin; reject the missing path and preserve the existing cleanup
behavior, while retaining CarouselWidgetProvider for absent image paths.
In `@app_src/utils/database.py`:
- Around line 189-192: Update remove_images to materialize the paths iterable
once before either DELETE operation, then reuse that materialized collection for
both the widget_images and images deletes so generators and other one-shot
iterables remove records from both tables.
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app_src/android/p4a/hook.pyapp_src/android/res/values/widgets.xmlapp_src/android/res/xml/image_widget_info.xmlapp_src/android/src/ImageWidgetProvider.javaapp_src/ui/screens/full_screen.pyapp_src/utils/android.pyapp_src/utils/database.py
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Inline comments:
In `@app_src/ui/screens/full_screen.py`:
- Around line 427-429: Update the theme-change logic in _set_theme_color to
assign the new theme foreground color to each item’s text_color and
leading_icon_color, alongside md_bg_color, before refreshing
header_dropdown_menu.items. Preserve the existing menu item update flow.
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app_src/ui/screens/full_screen.py
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Actionable comments posted: 4
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Inline comments:
In `@app_src/android/src/CarouselWidgetProvider.java`:
- Line 65: Remove the pending-image lookup from
CarouselWidgetProvider.onUpdate(), including its claim, widget_images
persistence, and wallpaper.txt fallback bypass; leave pending_widget_image.txt
resolution exclusively to ImageWidgetProvider so cancelled image-widget pins
cannot affect carousel updates.
In `@app_src/android/src/ImageWidgetProvider.java`:
- Around line 75-80: Update onUpdate to resolve and reuse a File for imagePath,
check whether the mapped file exists before selecting the action, and choose
open_widget_picker when it is missing or the path is blank; only set
open_widget_image and image_path for an existing file.
In `@app_src/utils/image_operations.py`:
- Line 170: Preserve picker selection order when assigning images by collecting
worker results with their input indices and rebuilding the list in selection
order before calling assign_picked_images_to_widget. Apply this at both
app_src/utils/image_operations.py lines 170-170 and 245-245; both call sites
must receive the reordered list.
In `@app_src/utils/widget_intent.py`:
- Line 98: Update both retry sites in app_src/utils/widget_intent.py at lines
98-98 and 110-110: in the readiness-failure callbacks, capture _attempts + 1 in
a closure and schedule that callback with Clock.schedule_once using only the
callback and timeout arguments, preserving retry progression.
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📒 Files selected for processing (8)
app_src/android/p4a/hook.pyapp_src/android/res/layout/carousel_widget.xmlapp_src/android/src/CarouselWidgetProvider.javaapp_src/android/src/ImageWidgetProvider.javaapp_src/android/src/WidgetUpdater.javaapp_src/utils/android.pyapp_src/utils/image_operations.pyapp_src/utils/widget_intent.py
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- CarouselWidgetProvider: stop claiming pending_widget_image.txt (stale pins could persist an image); rely on widget_images DB + wallpaper.txt - ImageWidgetProvider: open file picker when mapped image file is missing instead of sending open_widget_image with a dead path - widget_intent: capture retry counter in closure (schedule_once only accepts callback + timeout)
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Summary
Adds an Add to Home Screen button to the full-screen image viewer so any wallpaper can be pinned as its own home screen widget. Multiple widgets with different images are supported, while the existing rotating carousel widget keeps working unchanged.
What changed
ImageWidgetProvider(Java) — fixed-image widget provider. Each instance reads its image from the newwidget_imagesDB table (app_widget_id → image_path), claims a pending image written at pin time, and cleans up its row inonDeleted.image_widget_info.xml— widget meta-data for the new provider (reuses the carousel widget layout).hook.py— declares the new<receiver>(label "Waller Image Widget").database.py— newwidget_imagestable + CRUD;remove_image(s)/clear_allcascade-delete widget rows; schema now runs viaexecutescript.utils/android.py—add_home_screen_widget(image_path=...)pinsImageWidgetProviderwith a pending image when given a path, otherwise pinsCarouselWidgetProvider(existing behavior).full_screen.py— new "home" icon button in the bottom toolbar with theme-color support.Behavior
Notes
buildozer android debug) is required.Summary by CodeRabbit