ImageCropper creates artifacts when switching between images
#3 708 ouverte le 30 janv. 2021
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Description
I am using ImageCropper in an app that allows the user to crop multiple bitmaps before submitting the changes in one batch.
The user needs to switch between bitmaps.
I let her select bitmaps through a ListView. Every time the ListView has a new SelectedItem, I grab the current CroppedRegion off the ImageCropper and store it with the bitmap instance. Then I load the newly selected bitmap into ImageCropper and try to set the cropped rect. The bitmap initializes the stored Crop to 0/0/Width/Height...
When switching between bitmaps I notice that the ImageCropper produces wrong crop rectangles and sometimes even artifacts of underlying canvas pixels... Do I need to wait for the load and process to finish???
Anything I am not getting?
Maybe it would be a good idea to make two changes:
- Give
LoadImageFromFile()an optional parameterRect?that identifies a desired cropped region - Raise an event every time the user changes the Crop so that the app can track changes by the user
This was posted as a bug in https://github.com/MicrosoftDocs/WindowsCommunityToolkitDocs/issues/400 and was suggested to be posted here as well...