Struct HistogramColorBar 

pub struct HistogramColorBar {
    pub colormap: Colormap,
    pub data_range: (f64, f64),
    pub histogram: Option<(Vec<u64>, Vec<f64>)>,
    pub vmin: f64,
    pub vmax: f64,
    pub bar_bounds: Option<(f32, f32)>,
}

An interactive histogram colorbar. Built fresh each frame by its owner from the active colormap, the image’s value range, the value-distribution histogram, and the current vmin/vmax.

Fields

colormap: Colormap

The colormap whose gradient and LUT are shown.

data_range: (f64, f64)

The image’s value range (min, max); the axis is derived from this via axis_range.

histogram: Option<(Vec<u64>, Vec<f64>)>

(counts, edges) from crate::core::histogram::compute_histogram, or None to draw the gradient + handles without a histogram.

vmin: f64

Current low level (drawn as the bottom handle).

vmax: f64

Current high level (drawn as the top handle).

bar_bounds: Option<(f32, f32)>

Absolute screen (top, bottom) the gradient strip + histogram + handles should span, so the bar aligns with an external reference (the owning image’s data-area guides). None falls back to the allocated box inset by V_INSET. Set by the owner from the image plot’s data-area rect.

Implementations

impl HistogramColorBar

pub fn new(colormap: Colormap) -> Self

A histogram colorbar for colormap, taking the levels from the colormap’s vmin/vmax and the data range likewise (override with the builders).

pub fn with_data_range(self, range: (f64, f64)) -> Self

Set the image’s value range (builder form).

pub fn with_histogram(self, histogram: Option<(Vec<u64>, Vec<f64>)>) -> Self

Set the value-distribution histogram (builder form).

pub fn with_levels(self, vmin: f64, vmax: f64) -> Self

Set the current levels (builder form).

pub fn with_bar_bounds(self, top: f32, bottom: f32) -> Self

Pin the gradient strip (and histogram/handles) to absolute screen (top, bottom), so the bar lines up with the owning image’s data-area guides instead of filling its allocated box (builder form).

pub fn ui(&self, ui: &mut Ui, desired: Vec2) -> HistogramColorBarResponse

Paint the histogram + gradient + draggable handles into a desired-sized region of ui and report any handle drag this frame. The column senses clicks so a right-click opens the Auto-range context menu.

pub fn ui_at(&self, ui: &Ui, rect: Rect) -> HistogramColorBarResponse

Render at an explicit rect instead of allocating from the layout cursor, for embedding in a fixed gutter — e.g. a plot’s colorbar region in crate::widget::plot_widget::PlotView. Same interaction and paint as Self::ui; pair with Self::with_bar_bounds when the gutter is taller than the data area it should track.

Trait Implementations

impl Clone for HistogramColorBar

fn clone(&self) -> HistogramColorBar

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for HistogramColorBar

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.