avis-imgv 0.3.1

Image viewer based on egui. Makes use of modern RAM amounts by loading images ahead of time for very fast responsiveness. Minimal UI with heavy use of shortcuts.
Documentation 
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use eframe::egui;

use egui::{style, Color32};

pub fn apply_theme(ctx: &egui::Context) {
    let previous_theme = ctx.style().visuals.clone();

    let accent = Color32::from_rgb(220, 220, 220);
    let bg = Color32::from_rgb(48, 48, 48);
    let wbg = Color32::from_rgb(200, 200, 200);
    let extreme_bg = Color32::from_rgb(70, 70, 70);
    let light_bg = Color32::from_rgb(150, 150, 150);
    let font = Color32::from_rgb(185, 185, 185);

    ctx.set_visuals(egui::Visuals {
        override_text_color: Some(font),
        window_fill: bg,
        panel_fill: bg,
        button_frame: true,
        extreme_bg_color: extreme_bg,
        widgets: style::Widgets {
            noninteractive: create_widget_visuals(
                previous_theme.widgets.noninteractive,
                wbg,
                accent,
            ),
            inactive: create_widget_visuals(previous_theme.widgets.hovered, wbg, bg),
            hovered: create_widget_visuals(previous_theme.widgets.hovered, light_bg, bg),
            active: create_widget_visuals(previous_theme.widgets.active, wbg, light_bg),
            open: create_widget_visuals(previous_theme.widgets.open, wbg, bg),
        },
        ..previous_theme
    });
}

fn create_widget_visuals(
    previous: style::WidgetVisuals,
    bg_fill: egui::Color32,
    stroke: egui::Color32,
) -> style::WidgetVisuals {
    style::WidgetVisuals {
        bg_fill,
        bg_stroke: egui::Stroke {
            color: stroke,
            ..previous.bg_stroke
        },
        ..previous
    }
}