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rect_elem.rs
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rect_elem.rs
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use super::{Orientation, PlotPoint};
use crate::plot::transform::{PlotBounds, ScreenTransform};
use epaint::emath::NumExt;
use epaint::{Color32, Rgba, Stroke};
/// Trait that abstracts from rectangular 'Value'-like elements, such as bars or boxes
pub(super) trait RectElement {
fn name(&self) -> &str;
fn bounds_min(&self) -> PlotPoint;
fn bounds_max(&self) -> PlotPoint;
fn bounds(&self) -> PlotBounds {
let mut bounds = PlotBounds::NOTHING;
bounds.extend_with(&self.bounds_min());
bounds.extend_with(&self.bounds_max());
bounds
}
/// At which argument (input; usually X) there is a ruler (usually vertical)
fn arguments_with_ruler(&self) -> Vec<PlotPoint> {
// Default: one at center
vec![self.bounds().center()]
}
/// At which value (output; usually Y) there is a ruler (usually horizontal)
fn values_with_ruler(&self) -> Vec<PlotPoint>;
/// The diagram's orientation (vertical/horizontal)
fn orientation(&self) -> Orientation;
/// Get X/Y-value for (argument, value) pair, taking into account orientation
fn point_at(&self, argument: f64, value: f64) -> PlotPoint {
match self.orientation() {
Orientation::Horizontal => PlotPoint::new(value, argument),
Orientation::Vertical => PlotPoint::new(argument, value),
}
}
/// Right top of the rectangle (position of text)
fn corner_value(&self) -> PlotPoint {
//self.point_at(self.position + self.width / 2.0, value)
PlotPoint {
x: self.bounds_max().x,
y: self.bounds_max().y,
}
}
/// Debug formatting for hovered-over value, if none is specified by the user
fn default_values_format(&self, transform: &ScreenTransform) -> String;
}
// ----------------------------------------------------------------------------
// Helper functions
pub(super) fn highlighted_color(mut stroke: Stroke, fill: Color32) -> (Stroke, Color32) {
stroke.width *= 2.0;
let fill = Rgba::from(fill);
let fill_alpha = (2.0 * fill.a()).at_most(1.0);
let fill = fill.to_opaque().multiply(fill_alpha);
(stroke, fill.into())
}