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use crate::coord::cartesian::{Cartesian2d, MeshLine};
use crate::coord::ranged1d::{KeyPointHint, Ranged};
use crate::coord::{CoordTranslate, Shift};
use crate::element::{CoordMapper, Drawable, PointCollection};
use crate::style::text_anchor::{HPos, Pos, VPos};
use crate::style::{Color, SizeDesc, TextStyle};
/// The abstraction of a drawing area
use plotters_backend::{BackendCoord, DrawingBackend, DrawingErrorKind};
use std::borrow::Borrow;
use std::cell::RefCell;
use std::error::Error;
use std::iter::{once, repeat};
use std::ops::Range;
use std::rc::Rc;
/// The representation of the rectangle in backend canvas
#[derive(Clone, Debug)]
pub struct Rect {
x0: i32,
y0: i32,
x1: i32,
y1: i32,
}
impl Rect {
/// Split the rectangle into a few smaller rectangles
fn split<'a, BPI: IntoIterator<Item = &'a i32> + 'a>(
&'a self,
break_points: BPI,
vertical: bool,
) -> impl Iterator<Item = Rect> + 'a {
let (mut x0, mut y0) = (self.x0, self.y0);
let (full_x, full_y) = (self.x1, self.y1);
break_points
.into_iter()
.chain(once(if vertical { &self.y1 } else { &self.x1 }))
.map(move |&p| {
let x1 = if vertical { full_x } else { p };
let y1 = if vertical { p } else { full_y };
let ret = Rect { x0, y0, x1, y1 };
if vertical {
y0 = y1
} else {
x0 = x1;
}
ret
})
}
/// Evenly split the rectangle to a row * col mesh
fn split_evenly(&self, (row, col): (usize, usize)) -> impl Iterator<Item = Rect> + '_ {
fn compute_evenly_split(from: i32, to: i32, n: usize, idx: usize) -> i32 {
let size = (to - from) as usize;
from + idx as i32 * (size / n) as i32 + idx.min(size % n) as i32
}
(0..row)
.map(move |x| repeat(x).zip(0..col))
.flatten()
.map(move |(ri, ci)| Self {
y0: compute_evenly_split(self.y0, self.y1, row, ri),
y1: compute_evenly_split(self.y0, self.y1, row, ri + 1),
x0: compute_evenly_split(self.x0, self.x1, col, ci),
x1: compute_evenly_split(self.x0, self.x1, col, ci + 1),
})
}
/// Evenly the rectangle into a grid with arbitrary breaks; return a rect iterator.
fn split_grid(
&self,
x_breaks: impl Iterator<Item = i32>,
y_breaks: impl Iterator<Item = i32>,
) -> impl Iterator<Item = Rect> {
let mut xs = vec![self.x0, self.x1];
let mut ys = vec![self.y0, self.y1];
xs.extend(x_breaks.map(|v| v + self.x0));
ys.extend(y_breaks.map(|v| v + self.y0));
xs.sort_unstable();
ys.sort_unstable();
let xsegs: Vec<_> = xs
.iter()
.zip(xs.iter().skip(1))
.map(|(a, b)| (*a, *b))
.collect();
let ysegs: Vec<_> = ys
.iter()
.zip(ys.iter().skip(1))
.map(|(a, b)| (*a, *b))
.collect();
ysegs
.into_iter()
.map(move |(y0, y1)| {
xsegs
.clone()
.into_iter()
.map(move |(x0, x1)| Self { x0, y0, x1, y1 })
})
.flatten()
}
/// Make the coordinate in the range of the rectangle
pub fn truncate(&self, p: (i32, i32)) -> (i32, i32) {
(p.0.min(self.x1).max(self.x0), p.1.min(self.y1).max(self.y0))
}
}
/// The abstraction of a drawing area. Plotters uses drawing area as the fundamental abstraction for the
/// high level drawing API. The major functionality provided by the drawing area is
/// 1. Layout specification - Split the parent drawing area into sub-drawing-areas
/// 2. Coordinate Translation - Allows guest coordinate system attached and used for drawing.
/// 3. Element based drawing - drawing area provides the environment the element can be drawn onto it.
pub struct DrawingArea<DB: DrawingBackend, CT: CoordTranslate> {
backend: Rc<RefCell<DB>>,
rect: Rect,
coord: CT,
}
impl<DB: DrawingBackend, CT: CoordTranslate + Clone> Clone for DrawingArea<DB, CT> {
fn clone(&self) -> Self {
Self {
backend: self.backend.clone(),
rect: self.rect.clone(),
coord: self.coord.clone(),
}
}
}
/// The error description of any drawing area API
#[derive(Debug)]
pub enum DrawingAreaErrorKind<E: Error + Send + Sync> {
/// The error is due to drawing backend failure
BackendError(DrawingErrorKind<E>),
/// We are not able to get the mutable reference of the backend,
/// which indicates the drawing backend is current used by other
/// drawing operation
SharingError,
/// The error caused by invalid layout
LayoutError,
}
impl<E: Error + Send + Sync> std::fmt::Display for DrawingAreaErrorKind<E> {
fn fmt(&self, fmt: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
match self {
DrawingAreaErrorKind::BackendError(e) => write!(fmt, "backend error: {}", e),
DrawingAreaErrorKind::SharingError => {
write!(fmt, "Multiple backend operation in progress")
}
DrawingAreaErrorKind::LayoutError => write!(fmt, "Bad layout"),
}
}
}
impl<E: Error + Send + Sync> Error for DrawingAreaErrorKind<E> {}
#[allow(type_alias_bounds)]
type DrawingAreaError<T: DrawingBackend> = DrawingAreaErrorKind<T::ErrorType>;
impl<DB: DrawingBackend> From<DB> for DrawingArea<DB, Shift> {
fn from(backend: DB) -> Self {
Self::with_rc_cell(Rc::new(RefCell::new(backend)))
}
}
impl<'a, DB: DrawingBackend> From<&'a Rc<RefCell<DB>>> for DrawingArea<DB, Shift> {
fn from(backend: &'a Rc<RefCell<DB>>) -> Self {
Self::with_rc_cell(backend.clone())
}
}
/// A type which can be converted into a root drawing area
pub trait IntoDrawingArea: DrawingBackend + Sized {
/// Convert the type into a root drawing area
fn into_drawing_area(self) -> DrawingArea<Self, Shift>;
}
impl<T: DrawingBackend> IntoDrawingArea for T {
fn into_drawing_area(self) -> DrawingArea<T, Shift> {
self.into()
}
}
impl<DB: DrawingBackend, X: Ranged, Y: Ranged> DrawingArea<DB, Cartesian2d<X, Y>> {
/// Draw the mesh on a area
pub fn draw_mesh<DrawFunc, YH: KeyPointHint, XH: KeyPointHint>(
&self,
mut draw_func: DrawFunc,
y_count_max: YH,
x_count_max: XH,
) -> Result<(), DrawingAreaErrorKind<DB::ErrorType>>
where
DrawFunc: FnMut(&mut DB, MeshLine<X, Y>) -> Result<(), DrawingErrorKind<DB::ErrorType>>,
{
self.backend_ops(move |b| {
self.coord
.draw_mesh(y_count_max, x_count_max, |line| draw_func(b, line))
})
}
/// Get the range of X of the guest coordinate for current drawing area
pub fn get_x_range(&self) -> Range<X::ValueType> {
self.coord.get_x_range()
}
/// Get the range of Y of the guest coordinate for current drawing area
pub fn get_y_range(&self) -> Range<Y::ValueType> {
self.coord.get_y_range()
}
/// Get the range of X of the backend coordinate for current drawing area
pub fn get_x_axis_pixel_range(&self) -> Range<i32> {
self.coord.get_x_axis_pixel_range()
}
/// Get the range of Y of the backend coordinate for current drawing area
pub fn get_y_axis_pixel_range(&self) -> Range<i32> {
self.coord.get_y_axis_pixel_range()
}
}
impl<DB: DrawingBackend, CT: CoordTranslate> DrawingArea<DB, CT> {
/// Get the left upper conner of this area in the drawing backend
pub fn get_base_pixel(&self) -> BackendCoord {
(self.rect.x0, self.rect.y0)
}
/// Strip the applied coordinate specification and returns a shift-based drawing area
pub fn strip_coord_spec(&self) -> DrawingArea<DB, Shift> {
DrawingArea {
rect: self.rect.clone(),
backend: self.backend.clone(),
coord: Shift((self.rect.x0, self.rect.y0)),
}
}
/// Strip the applied coordinate specification and returns a drawing area
pub fn use_screen_coord(&self) -> DrawingArea<DB, Shift> {
DrawingArea {
rect: self.rect.clone(),
backend: self.backend.clone(),
coord: Shift((0, 0)),
}
}
/// Get the area dimension in pixel
pub fn dim_in_pixel(&self) -> (u32, u32) {
(
(self.rect.x1 - self.rect.x0) as u32,
(self.rect.y1 - self.rect.y0) as u32,
)
}
/// Compute the relative size based on the drawing area's height
pub fn relative_to_height(&self, p: f64) -> f64 {
f64::from((self.rect.y1 - self.rect.y0).max(0)) * (p.min(1.0).max(0.0))
}
/// Compute the relative size based on the drawing area's width
pub fn relative_to_width(&self, p: f64) -> f64 {
f64::from((self.rect.x1 - self.rect.x0).max(0)) * (p.min(1.0).max(0.0))
}
/// Get the pixel range of this area
pub fn get_pixel_range(&self) -> (Range<i32>, Range<i32>) {
(self.rect.x0..self.rect.x1, self.rect.y0..self.rect.y1)
}
/// Perform operation on the drawing backend
fn backend_ops<R, O: FnOnce(&mut DB) -> Result<R, DrawingErrorKind<DB::ErrorType>>>(
&self,
ops: O,
) -> Result<R, DrawingAreaError<DB>> {
if let Ok(mut db) = self.backend.try_borrow_mut() {
db.ensure_prepared()
.map_err(DrawingAreaErrorKind::BackendError)?;
ops(&mut db).map_err(DrawingAreaErrorKind::BackendError)
} else {
Err(DrawingAreaErrorKind::SharingError)
}
}
/// Fill the entire drawing area with a color
pub fn fill<ColorType: Color>(&self, color: &ColorType) -> Result<(), DrawingAreaError<DB>> {
self.backend_ops(|backend| {
backend.draw_rect(
(self.rect.x0, self.rect.y0),
(self.rect.x1 - 1, self.rect.y1 - 1),
&color.to_backend_color(),
true,
)
})
}
/// Draw a single pixel
pub fn draw_pixel<ColorType: Color>(
&self,
pos: CT::From,
color: &ColorType,
) -> Result<(), DrawingAreaError<DB>> {
let pos = self.coord.translate(&pos);
self.backend_ops(|b| b.draw_pixel(pos, color.to_backend_color()))
}
/// Present all the pending changes to the backend
pub fn present(&self) -> Result<(), DrawingAreaError<DB>> {
self.backend_ops(|b| b.present())
}
/// Draw an high-level element
pub fn draw<'a, E, B>(&self, element: &'a E) -> Result<(), DrawingAreaError<DB>>
where
B: CoordMapper,
&'a E: PointCollection<'a, CT::From, B>,
E: Drawable<DB, B>,
{
let backend_coords = element.point_iter().into_iter().map(|p| {
let b = p.borrow();
B::map(&self.coord, b, &self.rect)
});
self.backend_ops(move |b| element.draw(backend_coords, b, self.dim_in_pixel()))
}
/// Map coordinate to the backend coordinate
pub fn map_coordinate(&self, coord: &CT::From) -> BackendCoord {
self.coord.translate(coord)
}
/// Estimate the dimension of the text if drawn on this drawing area.
/// We can't get this directly from the font, since the drawing backend may or may not
/// follows the font configuration. In terminal, the font family will be dropped.
/// So the size of the text is drawing area related.
///
/// - `text`: The text we want to estimate
/// - `font`: The font spec in which we want to draw the text
/// - **return**: The size of the text if drawn on this area
pub fn estimate_text_size(
&self,
text: &str,
style: &TextStyle,
) -> Result<(u32, u32), DrawingAreaError<DB>> {
self.backend_ops(move |b| b.estimate_text_size(text, style))
}
}
impl<DB: DrawingBackend> DrawingArea<DB, Shift> {
fn with_rc_cell(backend: Rc<RefCell<DB>>) -> Self {
let (x1, y1) = RefCell::borrow(backend.borrow()).get_size();
Self {
rect: Rect {
x0: 0,
y0: 0,
x1: x1 as i32,
y1: y1 as i32,
},
backend,
coord: Shift((0, 0)),
}
}
/// Shrink the region, note all the locations are in guest coordinate
pub fn shrink<A: SizeDesc, B: SizeDesc, C: SizeDesc, D: SizeDesc>(
mut self,
left_upper: (A, B),
dimension: (C, D),
) -> DrawingArea<DB, Shift> {
let left_upper = (left_upper.0.in_pixels(&self), left_upper.1.in_pixels(&self));
let dimension = (dimension.0.in_pixels(&self), dimension.1.in_pixels(&self));
self.rect.x0 = self.rect.x1.min(self.rect.x0 + left_upper.0);
self.rect.y0 = self.rect.y1.min(self.rect.y0 + left_upper.1);
self.rect.x1 = self.rect.x0.max(self.rect.x0 + dimension.0);
self.rect.y1 = self.rect.y0.max(self.rect.y0 + dimension.1);
self.coord = Shift((self.rect.x0, self.rect.y0));
self
}
/// Apply a new coord transformation object and returns a new drawing area
pub fn apply_coord_spec<CT: CoordTranslate>(&self, coord_spec: CT) -> DrawingArea<DB, CT> {
DrawingArea {
rect: self.rect.clone(),
backend: self.backend.clone(),
coord: coord_spec,
}
}
/// Create a margin for the given drawing area and returns the new drawing area
pub fn margin<ST: SizeDesc, SB: SizeDesc, SL: SizeDesc, SR: SizeDesc>(
&self,
top: ST,
bottom: SB,
left: SL,
right: SR,
) -> DrawingArea<DB, Shift> {
let left = left.in_pixels(self);
let right = right.in_pixels(self);
let top = top.in_pixels(self);
let bottom = bottom.in_pixels(self);
DrawingArea {
rect: Rect {
x0: self.rect.x0 + left,
y0: self.rect.y0 + top,
x1: self.rect.x1 - right,
y1: self.rect.y1 - bottom,
},
backend: self.backend.clone(),
coord: Shift((self.rect.x0 + left, self.rect.y0 + top)),
}
}
/// Split the drawing area vertically
pub fn split_vertically<S: SizeDesc>(&self, y: S) -> (Self, Self) {
let y = y.in_pixels(self);
let split_point = [y + self.rect.y0];
let mut ret = self.rect.split(split_point.iter(), true).map(|rect| Self {
rect: rect.clone(),
backend: self.backend.clone(),
coord: Shift((rect.x0, rect.y0)),
});
(ret.next().unwrap(), ret.next().unwrap())
}
/// Split the drawing area horizontally
pub fn split_horizontally<S: SizeDesc>(&self, x: S) -> (Self, Self) {
let x = x.in_pixels(self);
let split_point = [x + self.rect.x0];
let mut ret = self.rect.split(split_point.iter(), false).map(|rect| Self {
rect: rect.clone(),
backend: self.backend.clone(),
coord: Shift((rect.x0, rect.y0)),
});
(ret.next().unwrap(), ret.next().unwrap())
}
/// Split the drawing area evenly
pub fn split_evenly(&self, (row, col): (usize, usize)) -> Vec<Self> {
self.rect
.split_evenly((row, col))
.map(|rect| Self {
rect: rect.clone(),
backend: self.backend.clone(),
coord: Shift((rect.x0, rect.y0)),
})
.collect()
}
/// Split the drawing area into a grid with specified breakpoints on both X axis and Y axis
pub fn split_by_breakpoints<
XSize: SizeDesc,
YSize: SizeDesc,
XS: AsRef<[XSize]>,
YS: AsRef<[YSize]>,
>(
&self,
xs: XS,
ys: YS,
) -> Vec<Self> {
self.rect
.split_grid(
xs.as_ref().iter().map(|x| x.in_pixels(self)),
ys.as_ref().iter().map(|x| x.in_pixels(self)),
)
.map(|rect| Self {
rect: rect.clone(),
backend: self.backend.clone(),
coord: Shift((rect.x0, rect.y0)),
})
.collect()
}
/// Draw a title of the drawing area and return the remaining drawing area
pub fn titled<'a, S: Into<TextStyle<'a>>>(
&self,
text: &str,
style: S,
) -> Result<Self, DrawingAreaError<DB>> {
let style = style.into();
let x_padding = (self.rect.x1 - self.rect.x0) / 2;
let (_, text_h) = self.estimate_text_size(text, &style)?;
let y_padding = (text_h / 2).min(5) as i32;
let style = &style.pos(Pos::new(HPos::Center, VPos::Top));
self.backend_ops(|b| {
b.draw_text(
text,
style,
(self.rect.x0 + x_padding, self.rect.y0 + y_padding),
)
})?;
Ok(Self {
rect: Rect {
x0: self.rect.x0,
y0: self.rect.y0 + y_padding * 2 + text_h as i32,
x1: self.rect.x1,
y1: self.rect.y1,
},
backend: self.backend.clone(),
coord: Shift((self.rect.x0, self.rect.y0 + y_padding * 2 + text_h as i32)),
})
}
/// Draw text on the drawing area
pub fn draw_text(
&self,
text: &str,
style: &TextStyle,
pos: BackendCoord,
) -> Result<(), DrawingAreaError<DB>> {
self.backend_ops(|b| b.draw_text(text, style, (pos.0 + self.rect.x0, pos.1 + self.rect.y0)))
}
}
impl<DB: DrawingBackend, CT: CoordTranslate> DrawingArea<DB, CT> {
/// Returns the coordinates by value
pub fn into_coord_spec(self) -> CT {
self.coord
}
/// Returns the coordinates by reference
pub fn as_coord_spec(&self) -> &CT {
&self.coord
}
/// Returns the coordinates by mutable reference
pub fn as_coord_spec_mut(&mut self) -> &mut CT {
&mut self.coord
}
}
#[cfg(test)]
mod drawing_area_tests {
use crate::{create_mocked_drawing_area, prelude::*};
#[test]
fn test_filling() {
let drawing_area = create_mocked_drawing_area(1024, 768, |m| {
m.check_draw_rect(|c, _, f, u, d| {
assert_eq!(c, WHITE.to_rgba());
assert_eq!(f, true);
assert_eq!(u, (0, 0));
assert_eq!(d, (1023, 767));
});
m.drop_check(|b| {
assert_eq!(b.num_draw_rect_call, 1);
assert_eq!(b.draw_count, 1);
});
});
drawing_area.fill(&WHITE).expect("Drawing Failure");
}
#[test]
fn test_split_evenly() {
let colors = vec![
&RED, &BLUE, &YELLOW, &WHITE, &BLACK, &MAGENTA, &CYAN, &BLUE, &RED,
];
let drawing_area = create_mocked_drawing_area(902, 900, |m| {
for col in 0..3 {
for row in 0..3 {
let colors = colors.clone();
m.check_draw_rect(move |c, _, f, u, d| {
assert_eq!(c, colors[col * 3 + row].to_rgba());
assert_eq!(f, true);
assert_eq!(u, (300 * row as i32 + 2.min(row) as i32, 300 * col as i32));
assert_eq!(
d,
(
300 + 300 * row as i32 + 2.min(row + 1) as i32 - 1,
300 + 300 * col as i32 - 1
)
);
});
}
}
m.drop_check(|b| {
assert_eq!(b.num_draw_rect_call, 9);
assert_eq!(b.draw_count, 9);
});
});
drawing_area
.split_evenly((3, 3))
.iter_mut()
.zip(colors.iter())
.for_each(|(d, c)| {
d.fill(*c).expect("Drawing Failure");
});
}
#[test]
fn test_split_horizontally() {
let drawing_area = create_mocked_drawing_area(1024, 768, |m| {
m.check_draw_rect(|c, _, f, u, d| {
assert_eq!(c, RED.to_rgba());
assert_eq!(f, true);
assert_eq!(u, (0, 0));
assert_eq!(d, (345 - 1, 768 - 1));
});
m.check_draw_rect(|c, _, f, u, d| {
assert_eq!(c, BLUE.to_rgba());
assert_eq!(f, true);
assert_eq!(u, (345, 0));
assert_eq!(d, (1024 - 1, 768 - 1));
});
m.drop_check(|b| {
assert_eq!(b.num_draw_rect_call, 2);
assert_eq!(b.draw_count, 2);
});
});
let (left, right) = drawing_area.split_horizontally(345);
left.fill(&RED).expect("Drawing Error");
right.fill(&BLUE).expect("Drawing Error");
}
#[test]
fn test_split_vertically() {
let drawing_area = create_mocked_drawing_area(1024, 768, |m| {
m.check_draw_rect(|c, _, f, u, d| {
assert_eq!(c, RED.to_rgba());
assert_eq!(f, true);
assert_eq!(u, (0, 0));
assert_eq!(d, (1024 - 1, 345 - 1));
});
m.check_draw_rect(|c, _, f, u, d| {
assert_eq!(c, BLUE.to_rgba());
assert_eq!(f, true);
assert_eq!(u, (0, 345));
assert_eq!(d, (1024 - 1, 768 - 1));
});
m.drop_check(|b| {
assert_eq!(b.num_draw_rect_call, 2);
assert_eq!(b.draw_count, 2);
});
});
let (left, right) = drawing_area.split_vertically(345);
left.fill(&RED).expect("Drawing Error");
right.fill(&BLUE).expect("Drawing Error");
}
#[test]
fn test_split_grid() {
let colors = vec![
&RED, &BLUE, &YELLOW, &WHITE, &BLACK, &MAGENTA, &CYAN, &BLUE, &RED,
];
let breaks: [i32; 5] = [100, 200, 300, 400, 500];
for nxb in 0..=5 {
for nyb in 0..=5 {
let drawing_area = create_mocked_drawing_area(1024, 768, |m| {
for row in 0..=nyb {
for col in 0..=nxb {
let get_bp = |full, limit, id| {
(if id == 0 {
0
} else if id > limit {
full
} else {
breaks[id as usize - 1]
}) as i32
};
let expected_u = (get_bp(1024, nxb, col), get_bp(768, nyb, row));
let expected_d = (
get_bp(1024, nxb, col + 1) - 1,
get_bp(768, nyb, row + 1) - 1,
);
let expected_color =
colors[(row * (nxb + 1) + col) as usize % colors.len()];
m.check_draw_rect(move |c, _, f, u, d| {
assert_eq!(c, expected_color.to_rgba());
assert_eq!(f, true);
assert_eq!(u, expected_u);
assert_eq!(d, expected_d);
});
}
}
m.drop_check(move |b| {
assert_eq!(b.num_draw_rect_call, ((nxb + 1) * (nyb + 1)) as u32);
assert_eq!(b.draw_count, ((nyb + 1) * (nxb + 1)) as u32);
});
});
let result = drawing_area
.split_by_breakpoints(&breaks[0..nxb as usize], &breaks[0..nyb as usize]);
for i in 0..result.len() {
result[i]
.fill(colors[i % colors.len()])
.expect("Drawing Error");
}
}
}
}
#[test]
fn test_titled() {
let drawing_area = create_mocked_drawing_area(1024, 768, |m| {
m.check_draw_text(|c, font, size, _pos, text| {
assert_eq!(c, BLACK.to_rgba());
assert_eq!(font, "serif");
assert_eq!(size, 30.0);
assert_eq!("This is the title", text);
});
m.check_draw_rect(|c, _, f, u, d| {
assert_eq!(c, WHITE.to_rgba());
assert_eq!(f, true);
assert_eq!(u.0, 0);
assert!(u.1 > 0);
assert_eq!(d, (1024 - 1, 768 - 1));
});
m.drop_check(|b| {
assert_eq!(b.num_draw_text_call, 1);
assert_eq!(b.num_draw_rect_call, 1);
assert_eq!(b.draw_count, 2);
});
});
drawing_area
.titled("This is the title", ("serif", 30))
.unwrap()
.fill(&WHITE)
.unwrap();
}
#[test]
fn test_margin() {
let drawing_area = create_mocked_drawing_area(1024, 768, |m| {
m.check_draw_rect(|c, _, f, u, d| {
assert_eq!(c, WHITE.to_rgba());
assert_eq!(f, true);
assert_eq!(u, (3, 1));
assert_eq!(d, (1024 - 4 - 1, 768 - 2 - 1));
});
m.drop_check(|b| {
assert_eq!(b.num_draw_rect_call, 1);
assert_eq!(b.draw_count, 1);
});
});
drawing_area
.margin(1, 2, 3, 4)
.fill(&WHITE)
.expect("Drawing Failure");
}
#[test]
fn test_ranges() {
let drawing_area = create_mocked_drawing_area(1024, 768, |_m| {})
.apply_coord_spec(Cartesian2d::<
crate::coord::types::RangedCoordi32,
crate::coord::types::RangedCoordu32,
>::new(-100..100, 0..200, (0..1024, 0..768)));
let x_range = drawing_area.get_x_range();
assert_eq!(x_range, -100..100);
let y_range = drawing_area.get_y_range();
assert_eq!(y_range, 0..200);
}
#[test]
fn test_relative_size() {
let drawing_area = create_mocked_drawing_area(1024, 768, |_m| {});
assert_eq!(102.4, drawing_area.relative_to_width(0.1));
assert_eq!(384.0, drawing_area.relative_to_height(0.5));
assert_eq!(1024.0, drawing_area.relative_to_width(1.3));
assert_eq!(768.0, drawing_area.relative_to_height(1.5));
assert_eq!(0.0, drawing_area.relative_to_width(-0.2));
assert_eq!(0.0, drawing_area.relative_to_height(-0.5));
}
#[test]
fn test_relative_split() {
let drawing_area = create_mocked_drawing_area(1000, 1200, |m| {
let mut counter = 0;
m.check_draw_rect(move |c, _, f, u, d| {
assert_eq!(f, true);
match counter {
0 => {
assert_eq!(c, RED.to_rgba());
assert_eq!(u, (0, 0));
assert_eq!(d, (300 - 1, 600 - 1));
}
1 => {
assert_eq!(c, BLUE.to_rgba());
assert_eq!(u, (300, 0));
assert_eq!(d, (1000 - 1, 600 - 1));
}
2 => {
assert_eq!(c, GREEN.to_rgba());
assert_eq!(u, (0, 600));
assert_eq!(d, (300 - 1, 1200 - 1));
}
3 => {
assert_eq!(c, WHITE.to_rgba());
assert_eq!(u, (300, 600));
assert_eq!(d, (1000 - 1, 1200 - 1));
}
_ => panic!("Too many draw rect"),
}
counter += 1;
});
m.drop_check(|b| {
assert_eq!(b.num_draw_rect_call, 4);
assert_eq!(b.draw_count, 4);
});
});
let split =
drawing_area.split_by_breakpoints([(30).percent_width()], [(50).percent_height()]);
split[0].fill(&RED).unwrap();
split[1].fill(&BLUE).unwrap();
split[2].fill(&GREEN).unwrap();
split[3].fill(&WHITE).unwrap();
}
#[test]
fn test_relative_shrink() {
let drawing_area = create_mocked_drawing_area(1000, 1200, |m| {
m.check_draw_rect(move |_, _, _, u, d| {
assert_eq!((100, 100), u);
assert_eq!((300 - 1, 700 - 1), d);
});
m.drop_check(|b| {
assert_eq!(b.num_draw_rect_call, 1);
assert_eq!(b.draw_count, 1);
});
})
.shrink(((10).percent_width(), 100), (200, (50).percent_height()));
drawing_area.fill(&RED).unwrap();
}
}