| use crate::coord::cartesian::{Cartesian2d, MeshLine}; |
| use crate::coord::ranged1d::{KeyPointHint, Ranged}; |
| use crate::coord::{CoordTranslate, Shift}; |
| use crate::element::{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)] |
| 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<'a>(&'a self, (row, col): (usize, usize)) -> impl Iterator<Item = Rect> + 'a { |
| 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), |
| }) |
| } |
| |
| 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(); |
| ys.sort(); |
| |
| 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 |
| 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() |
| } |
| |
| pub fn get_x_axis_pixel_range(&self) -> Range<i32> { |
| self.coord.get_x_axis_pixel_range() |
| } |
| |
| 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)), |
| } |
| } |
| |
| 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, |
| 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.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>(&self, element: &'a E) -> Result<(), DrawingAreaError<DB>> |
| where |
| &'a E: PointCollection<'a, CT::From>, |
| E: Drawable<DB>, |
| { |
| let backend_coords = element.point_iter().into_iter().map(|p| { |
| let b = p.borrow(); |
| self.rect.truncate(self.coord.translate(b)) |
| }); |
| 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> { |
| pub fn into_coord_spec(self) -> CT { |
| self.coord |
| } |
| |
| pub fn as_coord_spec(&self) -> &CT { |
| &self.coord |
| } |
| |
| 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(); |
| } |
| } |
