Struct unsegen_jsonviewer::JsonViewer

pub struct JsonViewer { /* fields omitted */ }

A widget for viewing json data.

Set an initial value during construction (via new) and replace it either using update or reset.

The widgets provides multiple interaction points, for example to fold or unfold structures, or to grow or shrink the number of elements shown of an array. At any time, one of these knobs is active. Use select_next or select_previous or the Scrollable implementation to change it. Call toggle_active_element to interact with the currently active element. Interacting with an element might hide it, but the widget takes care to select another element in that case.

Methods

impl JsonViewer

pub fn new(value: impl Borrow<JsonValue>) -> Self

Create a new JsonViewer widget that will display the specified value.

It follows that it is impossible to not have content. However, it is possible to show an empty String, so there is that.

pub fn reset(&mut self, value: impl Borrow<JsonValue>)

Set a new value to display and do not highlight any changes (in contrast to update).

pub fn update(&mut self, value: impl Borrow<JsonValue>)

Set a new value to display and highlight changes from the previous value (which will be shown until the next update or reset.

pub fn select_next(&mut self) -> Result<(), ()>

Select the next interaction point of the widget (generally "down" from the current one).

pub fn select_previous(&mut self) -> Result<(), ()>

Select the previous interaction point of the widget (generally "up" from the current one).

pub fn toggle_active_element(&mut self) -> Result<(), ()>

Interact with the currently active interaction point and, for example, fold/unfold structures.

Trait Implementations

impl Widget for JsonViewer

fn space_demand(&self) -> Demand2D

Return the current demand for (rectangular) screen estate.

fn draw(&self, window: Window, hints: RenderingHints)

Draw the widget to the given window.

impl Scrollable for JsonViewer

fn scroll_forwards(&mut self) -> OperationResult

fn scroll_backwards(&mut self) -> OperationResult

fn scroll_to_beginning(&mut self) -> Result<(), ()>

fn scroll_to_end(&mut self) -> Result<(), ()>