Add ability to set color of Gradient | Reevaluate Gradients when underlying list changes

mponkin / fading_edge_scrollview

Flutter library for displaying fading edges on scroll views

BSD 3-Clause "New" or "Revised" License

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Add ability to set color of Gradient | Reevaluate Gradients when underlying list changes #22

Closed felixwoestmann closed 1 year ago

felixwoestmann commented 1 year ago

In this PR I took the Version of CoolDude53 (Link) and did the following things:

Upgrade to Dart 3
Add ScrollMetricsNotificationListener to get notified and then reevaluate if Gradients have to be shown when the underlying list changes.
Add ability to set the color of the gradient. Defaults to Colors.White.
Simplified code by removing duplication and making the evaluation more straightforward.

This version is working as of 11.11.2023

mponkin commented 1 year ago

Thanks for your participation!

mponkin commented 1 year ago

I will use the code to create a new version soon. However I have to note that gradientColor property will be removed since it has no effect. It is only used in gradient calculation which is used as shader mask. So only opacity of this property matters, not real color.

Adding a colored gradient is another task that requires drawing additional layer on top of existing widget. Current purpose of the widget is to make scrollable child inside semi-transparent on edges