tui-realm-treeview 0.2.1

Treeview component for tui-realm
Documentation

tui-realm-treeview

License: MIT Stars Downloads Crates.io Docs

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Developed by Christian Visintin
Current version: 0.2.1 (02/08/2021)

About tui-realm-treeview 🌲

tui-realm-treeview is an implementation of a treeview component for tui-realm, it is implemented wrapping the tui-tree-widget

Demo

Get started 🏁

Add tui-realm-treeview to your Cargo.toml 🦀

tui-realm-treeview = "0.2.1"

Use the treeview component

View how to use the treeview-component following the example. The example contains a simple file explorer using a tree view, the depth is set to 3.

cargo run --example demo
  • Press ENTER to expand the selected directory
  • Press BACKSPACE to go to upper directory
  • Move up and down with UP/DOWN arrow keys
  • Advance by up to 8 entries with PGUP/PGDOWN
  • Open directories with RIGHT
  • Close directories with LEFT
  • Change window between input field and treeview with TAB
  • Press ESC to quit

About performance

In this library there is a consistent use of recursion, and since rust is not functional, this might lead to stack overflows when dealing with huge trees. In addition consider that each level of depth added, will slow down the application exponentially.

Best practices:

  • Except when dealing with small trees, always set a depth for the tree
  • For file systems, depth 3 should be fine for each directory, then expand each directory on demand as implemented in the example

Behaviour

Events:

Event Message Behaviour
KeyCode::Enter OnSubmit Just returns submit event
KeyCode::Down OnChange Go to next element
KeyCode::Up OnChange Go to previous element
KeyCode::PageDown OnChange Move cursor down by defined max steps or end of node
KeyCode::PageUp OnChange Move cursor up by defined max steps or begin of node
KeyCode::Right OnChange Open highlighted node
KeyCode::Left OnChange Close highlighted node
KeyCode::Char(_) OnKey Return pressed key

Update: Msg::OnChange if the value changed, Msg::None otherwise.

State: the state returned is a One(Str) containing the id of the selected node. If no node is selected None is returned.

Properties:

  • with_foreground: foreground color. The foreground will be used as foreground for the selected item, when focus is false, otherwise as background
  • with_background: background color. The background color will be used as background for unselected entry, but will be used as foreground for the selected entry when focus is true
  • with_borders: set borders properties for component
  • with_title: Set box title
  • with_highlighted_str: The provided string will be displayed on the left side of the selected entry in the tree
  • with_tree_and_depth: Sets the tree and its max depth for Props builder
  • with_tree: Sets the tree for Props builder
  • with_node: Select initial node in the tree. This option has priority over keep_state
  • keep_state: If keep is true, the selected entry will be kept after an update of the tree (obviously if the entry still exists in the tree).
  • with_max_page_steps: Defines the maximum amount of steps to perform after a PG_DOWN / PG_UP

Documentation 📚

The developer documentation can be found on Rust Docs at https://docs.rs/tui-realm-treeview

Contributing and issues 🤝🏻

Contributions, bug reports, new features and questions are welcome! 😉 If you have any question or concern, or you want to suggest a new feature, or you want just want to improve tui-realm, feel free to open an issue or a PR.

Please follow our contributing guidelines

Changelog ⏳

View tui-realm-treeview's changelog HERE

Buy me a coffee ☕

If you like tui-realm-treeview and you're grateful for the work I've done, please consider a little donation 🥳

Buy-me-a-coffee

License 📃

tui-realm is licensed under the MIT license.

You can read the entire license HERE