73 lines
2 KiB
Rust
73 lines
2 KiB
Rust
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use crate::*;
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pub fn signal_to_timeline(
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signal: &wellen::Signal,
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time_table: &[wellen::Time],
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screen_width: u32,
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block_height: u32,
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var_format: VarFormat,
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) -> Timeline {
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const MIN_BLOCK_WIDTH: u32 = 3;
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// Courier New, 16px, sync with `label_style` in `pixi_canvas.rs`
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const LETTER_WIDTH: f64 = 9.61;
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const LETTER_HEIGHT: u32 = 18;
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const LABEL_X_PADDING: u32 = 10;
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let Some(last_time) = time_table.last().copied() else {
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return Timeline::default();
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};
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let last_time = last_time as f64;
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let screen_width = screen_width as f64;
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let mut x_value_pairs = signal
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.iter_changes()
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.map(|(index, value)| {
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let index = index as usize;
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let time = time_table[index] as f64;
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let x = time / last_time * screen_width;
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(x, value)
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})
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.peekable();
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// @TODO parallelize?
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let mut blocks = Vec::new();
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while let Some((block_x, value)) = x_value_pairs.next() {
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let next_block_x = if let Some((next_block_x, _)) = x_value_pairs.peek() {
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*next_block_x
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} else {
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screen_width
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};
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let block_width = (next_block_x - block_x) as u32;
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if block_width < MIN_BLOCK_WIDTH {
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continue;
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}
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// @TODO cache?
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let value = var_format.format(value);
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let value_width = (value.chars().count() as f64 * LETTER_WIDTH) as u32;
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// @TODO Ellipsis instead of hiding?
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let label = if (value_width + (2 * LABEL_X_PADDING)) <= block_width {
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Some(TimeLineBlockLabel {
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text: value,
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x: (block_width - value_width) / 2,
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y: (block_height - LETTER_HEIGHT) / 2,
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})
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} else {
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None
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};
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let block = TimelineBlock {
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x: block_x as u32,
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width: block_width,
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height: block_height,
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label,
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};
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blocks.push(block);
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}
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Timeline { blocks }
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}
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