302 lines
9.3 KiB
Rust
302 lines
9.3 KiB
Rust
use cairo::{
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Context, FontSlant, FontWeight, Format, ImageSurface, LineCap, Pattern,
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TextExtents,
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};
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pub struct AsymLineCutout {
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pub orientation: gtk::Orientation,
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pub start_x: f64,
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pub start_y: f64,
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pub start_length: f64,
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pub cutout_length: f64,
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pub end_length: f64,
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pub height: f64,
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pub invert: bool,
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}
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impl AsymLineCutout {
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pub fn draw(&self, pen: &impl Pen) {
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let dodge = if self.invert {
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self.height
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} else {
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-self.height
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};
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match self.orientation {
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gtk::Orientation::Horizontal => {
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pen.move_to(self.start_x, self.start_y);
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pen.line_to(self.start_x + self.start_length, self.start_y);
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pen.line_to(
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self.start_x + self.start_length + self.height,
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self.start_y + dodge,
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);
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pen.line_to(
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self.start_x + self.start_length + self.height + self.cutout_length,
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self.start_y + dodge,
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);
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pen.line_to(
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self.start_x
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+ self.start_length
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+ self.height
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+ self.cutout_length
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+ (self.height / 2.),
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self.start_y + dodge / 2.,
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);
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pen.line_to(
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self.start_x
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+ self.start_length
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+ self.height
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+ self.cutout_length
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+ (self.height / 2.)
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+ self.end_length,
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self.start_y + dodge / 2.,
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);
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}
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gtk::Orientation::Vertical => {
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pen.move_to(self.start_x, self.start_y);
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pen.line_to(self.start_x, self.start_y + self.start_length);
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pen.line_to(
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self.start_x + dodge,
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self.start_y + self.start_length + self.height,
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);
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pen.line_to(
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self.start_x + dodge,
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self.start_y + self.start_length + self.height + self.cutout_length,
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);
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pen.line_to(
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self.start_x + dodge / 2.,
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self.start_y
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+ self.start_length
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+ self.height
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+ self.cutout_length
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+ (self.height / 2.),
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);
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pen.line_to(
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self.start_x + dodge / 2.,
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self.start_y
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+ self.start_length
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+ self.height
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+ self.cutout_length
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+ (self.height / 2.)
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+ self.end_length,
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);
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}
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_ => panic!("unknown orientation"),
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}
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}
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}
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// Represents an asymetrical line that starts at one location, then a 45-degree angle and then
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// another line afterwards.
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pub struct AsymLine {
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// Will this be drawn left-to-right or up-to-down?
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pub orientation: gtk::Orientation,
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// Starting address
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pub start_x: f64,
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pub start_y: f64,
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// Length of the first segment
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pub start_length: f64,
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// Height to dodge over to the next section
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pub height: f64,
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// Total length of the entire line.
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pub end_length: f64,
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// When normal, the angle dodge is upwards. When inverted, the angle dodge is downwards.
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pub invert: bool,
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}
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impl AsymLine {
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pub fn draw(&self, pen: &impl Pen) {
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let dodge = if self.invert {
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self.height
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} else {
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-self.height
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};
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match self.orientation {
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gtk::Orientation::Horizontal => {
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pen.move_to(self.start_x, self.start_y);
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pen.line_to(self.start_x + self.start_length, self.start_y);
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pen.line_to(
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self.start_x + self.start_length + self.height,
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self.start_y + dodge,
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);
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pen.line_to(
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self.start_x + self.start_length + self.height + self.end_length,
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self.start_y + dodge,
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);
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}
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gtk::Orientation::Vertical => {}
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_ => panic!("unknown orientation"),
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}
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}
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}
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pub struct SlashMeter {
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pub orientation: gtk::Orientation,
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pub start_x: f64,
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pub start_y: f64,
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pub count: u8,
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pub fill_count: u8,
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pub height: f64,
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pub length: f64,
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}
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impl SlashMeter {
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pub fn draw(&self, context: &Context) {
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match self.orientation {
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gtk::Orientation::Horizontal => {
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let angle: f64 = 0.8;
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let run = self.height / angle.tan();
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let width = self.length / (self.count as f64 * 2.);
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for c in 0..self.count {
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context.set_line_width(1.);
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let start_x = self.start_x + c as f64 * width * 2.;
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context.move_to(start_x, self.start_y);
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context.line_to(start_x + run, self.start_y - self.height);
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context.line_to(start_x + run + width, self.start_y - self.height);
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context.line_to(start_x + width, self.start_y);
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context.line_to(start_x, self.start_y);
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if c < self.fill_count {
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let _ = context.fill();
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} else {
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let _ = context.stroke();
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}
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}
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}
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gtk::Orientation::Vertical => {}
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_ => panic!("unknown orientation"),
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}
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}
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}
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/// Represents a pen for drawing a pattern. This is good for complex patterns that may require
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/// multiple identical steps.
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pub trait Pen {
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/// Move the pen to a location.
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fn move_to(&self, x: f64, y: f64);
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/// Draw a line from the current location to the specified destination.
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fn line_to(&self, x: f64, y: f64);
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/// Instantiate the line.
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fn stroke(&self);
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/// Convert all of the drawing into a pattern that can be painted to a drawing context.
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fn finish(self) -> Pattern;
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}
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pub struct GlowPen {
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blur_context: Context,
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draw_context: Context,
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}
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impl GlowPen {
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pub fn new(
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width: i32,
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height: i32,
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line_width: f64,
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blur_line_width: f64,
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color: (f64, f64, f64),
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) -> Self {
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let blur_context =
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Context::new(ImageSurface::create(Format::Rgb24, width, height).unwrap()).unwrap();
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blur_context.set_line_width(blur_line_width);
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blur_context.set_source_rgba(color.0, color.1, color.2, 0.5);
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blur_context.push_group();
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blur_context.set_line_cap(LineCap::Round);
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let draw_context =
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Context::new(ImageSurface::create(Format::Rgb24, width, height).unwrap()).unwrap();
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draw_context.set_line_width(line_width);
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draw_context.set_source_rgb(color.0, color.1, color.2);
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draw_context.push_group();
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draw_context.set_line_cap(LineCap::Round);
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Self {
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blur_context,
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draw_context,
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}
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}
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}
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impl Pen for GlowPen {
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fn move_to(&self, x: f64, y: f64) {
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self.blur_context.move_to(x, y);
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self.draw_context.move_to(x, y);
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}
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fn line_to(&self, x: f64, y: f64) {
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self.blur_context.line_to(x, y);
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self.draw_context.line_to(x, y);
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}
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fn stroke(&self) {
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self.blur_context.stroke().expect("to draw the blur line");
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self.draw_context
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.stroke()
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.expect("to draw the regular line");
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}
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fn finish(self) -> Pattern {
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let foreground = self.draw_context.pop_group().unwrap();
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self.blur_context.set_source(foreground).unwrap();
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self.blur_context.paint().unwrap();
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self.blur_context.pop_group().unwrap()
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}
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}
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pub struct Text<'a> {
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content: Vec<String>,
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context: &'a Context,
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}
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impl<'a> Text<'a> {
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pub fn new(content: String, context: &'a Context, size: f64, width: f64) -> Self {
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context.select_font_face("Alegreya Sans SC", FontSlant::Normal, FontWeight::Bold);
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context.set_font_size(size);
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let lines = word_wrap(content, context, width);
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Self { content: lines, context }
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}
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pub fn extents(&self) -> TextExtents {
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self.context.text_extents(&self.content[0]).unwrap()
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}
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pub fn draw(&self) {
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let mut baseline = 0.;
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for line in self.content.iter() {
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baseline += self.context.text_extents(line).unwrap().height() + 10.;
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self.context.move_to(0., baseline);
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let _ = self.context.show_text(&line);
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}
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}
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}
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fn word_wrap(content: String, context: &Context, max_width: f64) -> Vec<String> {
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let mut lines = vec![];
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let words: Vec<&str> = content.split_whitespace().collect();
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let mut start: usize = 0;
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let mut line = String::new();
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for idx in 0..words.len() + 1 {
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line = words[start..idx].join(" ");
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let extents = context.text_extents(&line).unwrap();
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if extents.width() > max_width {
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let line = words[start..idx-1].join(" ");
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start = idx-1;
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lines.push(line.clone());
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}
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}
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if line.len() > 0 {
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lines.push(line);
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}
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lines
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}
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