Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Provide a viewer widget #8

Closed
chaorace opened this issue Jun 7, 2020 · 5 comments
Closed

Provide a viewer widget #8

chaorace opened this issue Jun 7, 2020 · 5 comments
Labels
enhancement New feature or request

Comments

@chaorace
Copy link

chaorace commented Jun 7, 2020

The app currently appears to be missing a viewer widget on Android (not sure about iOS). It would be nice to have specific files viewable on the launcher.
@amake
Copy link
Owner

amake commented Jun 8, 2020

I'm not a heavy Android user. Can you give me an example of an app that offers this?

("Widget" in Flutter means something very different, I think, so I also need a bit of help bridging the terminology gap.)

@amake amake added the enhancement New feature or request label Jun 8, 2020
@chaorace
Copy link
Author

chaorace commented Jun 8, 2020 •
edited by amake
Loading

I'm not an Android developer myself, so take this with a grain of salt...
On Android, widgets are essentially embedded views that the app provides to application launchers via a standard system level API.

The requested widget would essentially just be a view of a specific org file embedded as-is in a widget for viewing from the homescreen.

Here's a comparable example from Orgzly:
.

@amake
Copy link
Owner

amake commented Jun 8, 2020

Thanks, that's helpful. I think the key to whether this is feasible or not is whether you can get Flutter inside that embedded view.

@chaorace
Copy link
Author

chaorace commented Jun 8, 2020 •
edited
Loading

Flutter is essentially foreign to me, I wish I could provide more insight here...

Stack Overflow says there's no built-in support from Flutter for Android widgets. It doesn't necessarily seem impossible, though. Here's a walkthrough from 2018 demonstrating one way to do it.

Hmmm, disregard that link. I've read it over myself now and I'm no longer sure if that's really what I thought it was!

@amake
Copy link
Owner

amake commented Jun 8, 2020

The second link is about embedding a native view (e.g. implemented on the platform side in Java/Kotlin or Objective-C/Swift) inside Flutter, which is not what we’re looking for here.

This says that Android home widgets can only use very specific layouts called RemoteViews. Flutter can’t be embedded in these, so it’s just not possible.

I’m going to close this, but if it ever becomes possible then we can revisit it.

@amake amake closed this as completed Jun 8, 2020
amake added a commit that referenced this issue Oct 28, 2022
@amake
Fix internal Flutter error scrolling doc while width constrained
b93803a 
```
══╡ EXCEPTION CAUGHT BY SCHEDULER LIBRARY ╞═════════════════════════════════════════════════════════
The following assertion was thrown during a scheduler callback:
Layer OffsetEngineLayer was previously used as oldLayer.
Once a layer is used as oldLayer, it may not be used again. Instead, after calling one of the
SceneBuilder.push* methods and passing an oldLayer to it, use the layer returned by the method as
oldLayer in subsequent frames.
'dart:ui/compositing.dart':
Failed assertion: line 110 pos 9: '<optimized out>'

Either the assertion indicates an error in the framework itself, or we should provide substantially
more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
  https://github.com/flutter/flutter/issues/new?template=2_bug.md

When the exception was thrown, this was the stack:
#2      _EngineLayerWrapper._debugCheckNotUsedAsOldLayer (dart:ui/compositing.dart:110:9)
#3      SceneBuilder.addRetained.<anonymous closure>.recursivelyCheckChildrenUsedOnce (dart:ui/compositing.dart:695:21)
#4      List.forEach (dart:core-patch/growable_array.dart:416:8)
#5      SceneBuilder.addRetained.<anonymous closure>.recursivelyCheckChildrenUsedOnce (dart:ui/compositing.dart:701:18)
#6      SceneBuilder.addRetained.<anonymous closure> (dart:ui/compositing.dart:704:7)
#7      SceneBuilder.addRetained (dart:ui/compositing.dart:707:6)
#8      Layer._addToSceneWithRetainedRendering (package:flutter/src/rendering/layer.dart:671:15)
#9      ContainerLayer.addChildrenToScene (package:flutter/src/rendering/layer.dart:1284:13)
#10     OffsetLayer.addToScene (package:flutter/src/rendering/layer.dart:1421:5)
#11     Layer._addToSceneWithRetainedRendering (package:flutter/src/rendering/layer.dart:674:5)
#12     ContainerLayer.addChildrenToScene (package:flutter/src/rendering/layer.dart:1284:13)
#13     ClipRectLayer.addToScene (package:flutter/src/rendering/layer.dart:1590:5)
#14     Layer._addToSceneWithRetainedRendering (package:flutter/src/rendering/layer.dart:674:5)
#15     ContainerLayer.addChildrenToScene (package:flutter/src/rendering/layer.dart:1284:13)
#16     OffsetLayer.addToScene (package:flutter/src/rendering/layer.dart:1421:5)
#17     Layer._addToSceneWithRetainedRendering (package:flutter/src/rendering/layer.dart:674:5)
#18     ContainerLayer.addChildrenToScene (package:flutter/src/rendering/layer.dart:1284:13)
#19     OffsetLayer.addToScene (package:flutter/src/rendering/layer.dart:1421:5)
#20     Layer._addToSceneWithRetainedRendering (package:flutter/src/rendering/layer.dart:674:5)
#21     ContainerLayer.addChildrenToScene (package:flutter/src/rendering/layer.dart:1284:13)
#22     OffsetLayer.addToScene (package:flutter/src/rendering/layer.dart:1421:5)
#23     Layer._addToSceneWithRetainedRendering (package:flutter/src/rendering/layer.dart:674:5)
#24     ContainerLayer.addChildrenToScene (package:flutter/src/rendering/layer.dart:1284:13)
#25     TransformLayer.addToScene (package:flutter/src/rendering/layer.dart:1914:5)
#26     ContainerLayer.buildScene (package:flutter/src/rendering/layer.dart:1097:5)
#27     RenderView.compositeFrame (package:flutter/src/rendering/view.dart:231:37)
#28     RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:514:18)
#29     WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:869:13)
#30     RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:375:5)
#31     SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1271:15)
#32     SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1200:9)
#33     SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1058:5)
#34     _invoke (dart:ui/hooks.dart:145:13)
#35     PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:338:5)
#36     _drawFrame (dart:ui/hooks.dart:112:31)
(elided 2 frames from class _AssertionError)
════════════════════════════════════════════════════════════════════════════════════════════════════
```
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Assignees
No one assigned
Labels
enhancement New feature or request
Projects
None yet
Milestone
No milestone
Development

No branches or pull requests
2 participants
@amake @chaorace