This is a simple lib to allow constructing and displaying a timeline using a moving window.
The aim is twofold:
- have way to display timelines in Iced.
- do it efficiently/economically (both in memory and CPU) by limiting calculations to visible elements of the timeline.
The implementation is fairly generic:
- allowing the use of any
iced_native::Widgetas the 'Timeline display area' by letting the user implement the initialisation function: init_widget. - allowing the user to specify how to display each timeline element by letting the user implement the widget_add function.
- allowing the Time and The Values to be any type respecting a minimal set of traits.
- This is not a Widget but a Trait.
- There is no overflow behaviour. If an event does not fit entirely in the window it is ignored.
This repository contains an example .
This example builds a timeline from 10_000 events where the values to display,
u32 integers, are displayed as iced::Text widgets at the correct position and
with a width corresponding to the event duration.
You can try it out with:
cargo run --example text_widget_timeline
- figuring out how to use a Canvas as the 'Timeline display area' and what changes to make to the widget_add function signature and calls to permit proper drawing.
- can the set of necessary traits be even smaller, notably the Copy trait for the Values?
- improve the performance hit for very large numbers of events (>>10_000) due to iterating and filtering the entire timeline in an log(n) lines 56 and 57