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use minifb::{Key, MouseMode, Window, WindowOptions};
use resvg::{
tiny_skia::{self, Pixmap},
usvg::{self, fontdb},
};
use std::time::{Duration, Instant};
use super::hover::Hover;
use crate::figure::{
canvas::pixelcanvas::PixelCanvas, configuration::figureconfig::FigureConfig,
drawers::drawer::Drawer,
};
/// A utility struct for managing window operations and displaying graphics interactively.
pub struct Winop;
impl Default for Winop {
fn default() -> Self {
Self::new()
}
}
impl Winop {
/// Creates a new `Winop` instance.
///
/// # Returns
/// A new `Winop` instance.
pub fn new() -> Self {
Self
}
/// Displays an SVG image in a window.
///
/// # Parameters
/// - `svg_content`: The SVG content as a string.
/// - `window_title`: The title of the window.
///
/// # Panics
/// - If the SVG content cannot be parsed.
/// - If the window cannot be created.
#[allow(clippy::field_reassign_with_default)]
pub fn display_svg(svg_content: &str, window_title: &str, figure_config: &FigureConfig) {
// Initialize a font database.
let mut fontdb = fontdb::Database::new();
fontdb.load_system_fonts();
if figure_config.validate().is_ok() {
fontdb.load_font_data(figure_config.font_label.clone().unwrap().into_bytes());
}
// Parse the SVG content.
let mut opt = usvg::Options::default();
opt.fontdb = fontdb.into();
let tree = usvg::Tree::from_str(svg_content, &opt).expect("Failed to parse SVG");
// Get the dimensions of the SVG from the view box.
let size = tree.size();
let width = size.width() as usize;
let height = size.height() as usize;
// Render the SVG into a pixmap.
let mut pixmap = Pixmap::new(width as u32, height as u32).expect("Failed to create pixmap");
resvg::render(&tree, tiny_skia::Transform::default(), &mut pixmap.as_mut());
// Convert the pixmap into a pixel buffer.
let buffer: Vec<u32> = pixmap
.pixels()
.iter()
.map(|pixel| {
let r = pixel.red();
let g = pixel.green();
let b = pixel.blue();
let a = pixel.alpha();
((a as u32) << 24) | ((r as u32) << 16) | ((g as u32) << 8) | (b as u32)
})
.collect();
// Create a minifb window.
let mut window = Window::new(
window_title,
width,
height,
WindowOptions {
resize: false,
scale: minifb::Scale::X1,
..WindowOptions::default()
},
)
.expect("Unable to create window");
// Display the image in the window.
while window.is_open() && !window.is_key_down(Key::Escape) {
window
.update_with_buffer(&buffer, width, height)
.expect("Failed to update buffer");
}
}
/// Displays a plot in real-time with continuous updates.
///
/// # Parameters
/// - `canvas`: The `PixelCanvas` to draw on.
/// - `plot`: The plot to be rendered, implementing `Hover` and `Drawer`.
/// - `title`: The title of the window.
/// - `update_data`: A closure to update the plot's data dynamically.
/// - `fps`: Frames per second for rendering updates.
///
/// # Panics
/// - If the window cannot be created.
pub fn display_real_time<T: Hover + Drawer>(
canvas: &mut PixelCanvas,
plot: &mut T,
title: &str,
mut update_data: impl FnMut(&mut T) + 'static,
fps: u32,
) {
let width = canvas.width as usize;
let height = canvas.height as usize;
let mut window = Window::new(
title,
width,
height,
WindowOptions {
resize: true,
scale: minifb::Scale::X1,
..WindowOptions::default()
},
)
.unwrap_or_else(|e| panic!("Unable to open Window: {e}"));
let frame_duration = Duration::from_secs_f32(1.0 / fps as f32);
let mut last_frame_time = Instant::now();
let mut hover_enabled = false;
let mut show_hints = false;
while window.is_open() && !window.is_key_pressed(Key::Escape, minifb::KeyRepeat::No) {
// Update data for real-time rendering.
if last_frame_time.elapsed() >= frame_duration {
update_data(plot);
plot.draw(canvas);
last_frame_time = Instant::now();
}
// Render the canvas to a buffer.
let mut buffer: Vec<u32> = Self::canvas_to_buffer(canvas);
if hover_enabled {
if let Some(mouse_pos) = window.get_mouse_pos(MouseMode::Pass) {
let (mouse_x, mouse_y) = (mouse_pos.0 as u32, mouse_pos.1 as u32);
if let Some(updated_buffer) = plot.handle_hover(mouse_x, mouse_y, canvas) {
buffer = updated_buffer;
}
}
}
if show_hints {
Self::render_hints(canvas);
}
if window.is_key_pressed(Key::C, minifb::KeyRepeat::No) {
hover_enabled = !hover_enabled;
}
if window.is_key_pressed(Key::H, minifb::KeyRepeat::No) {
show_hints = !show_hints;
}
window.update_with_buffer(&buffer, width, height).unwrap();
}
}
/// Converts the canvas buffer into a format compatible with minifb.
///
/// # Parameters
/// - `canvas`: The `PixelCanvas` whose buffer needs conversion.
///
/// # Returns
/// A vector of `u32` representing the pixel data in ARGB format.
fn canvas_to_buffer(canvas: &PixelCanvas) -> Vec<u32> {
canvas
.buffer
.chunks_exact(3)
.map(|rgb| {
let r = rgb[0] as u32;
let g = rgb[1] as u32;
let b = rgb[2] as u32;
0xFF000000 | (r << 16) | (g << 8) | b
})
.collect()
}
/// Displays a plot in an interactive window with hover functionality.
///
/// # Parameters
/// - `canvas`: The `PixelCanvas` to draw on.
/// - `plot`: The plot to be rendered, implementing `Hover`.
/// - `title`: The title of the window.
///
/// # Panics
/// - If the window cannot be created.
pub fn display_interactive<T: Hover>(canvas: &mut PixelCanvas, plot: &T, title: &str) {
let width = canvas.width as usize;
let height = canvas.height as usize;
let mut window = Window::new(
title,
width,
height,
WindowOptions {
resize: true,
scale: minifb::Scale::X1,
..WindowOptions::default()
},
)
.unwrap_or_else(|e| panic!("Unable to open Window: {e}"));
let mut hover_enabled = false;
let mut show_hints = false;
while window.is_open() && !window.is_key_pressed(Key::Escape, minifb::KeyRepeat::No) {
// Render the canvas to a buffer.
let mut buffer: Vec<u32> = Self::canvas_to_buffer(canvas);
if show_hints {
Self::render_hints(canvas);
}
if hover_enabled {
if let Some(mouse_pos) = window.get_mouse_pos(MouseMode::Pass) {
let (mouse_x, mouse_y) = (mouse_pos.0 as u32, mouse_pos.1 as u32);
if let Some(updated_buffer) = plot.handle_hover(mouse_x, mouse_y, canvas) {
buffer = updated_buffer;
}
}
}
if window.is_key_pressed(Key::H, minifb::KeyRepeat::No) {
show_hints = !show_hints;
}
if window.is_key_pressed(Key::C, minifb::KeyRepeat::No) {
hover_enabled = !hover_enabled;
}
window.update_with_buffer(&buffer, width, height).unwrap();
}
}
/// Renders hints on the canvas for user guidance.
///
/// # Parameters
/// - `canvas`: The `PixelCanvas` to display hints on.
///
/// # Note
/// This function is a placeholder and needs to be implemented for specific hint rendering.
fn render_hints(_canvas: &mut PixelCanvas) {
// todo!();
}
}