i_slint_core/
lengths.rs

1// Copyright © SixtyFPS GmbH <info@slint.dev>
2// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0
3
4use crate::BorderRadius;
5use crate::Coord;
6/// This type is used as a tagging type for use with [`euclid::Scale`] to convert
7/// between physical and logical pixels.
8pub struct PhysicalPx;
9
10/// This type is used as a tagging type for use with [`euclid::Scale`] to convert
11/// between physical and logical pixels.
12pub struct LogicalPx;
13pub type LogicalLength = euclid::Length<Coord, LogicalPx>;
14pub type LogicalRect = euclid::Rect<Coord, LogicalPx>;
15pub type LogicalPoint = euclid::Point2D<Coord, LogicalPx>;
16pub type LogicalSize = euclid::Size2D<Coord, LogicalPx>;
17pub type LogicalVector = euclid::Vector2D<Coord, LogicalPx>;
18pub type LogicalBorderRadius = BorderRadius<Coord, LogicalPx>;
19pub type ItemTransform = euclid::Transform2D<f32, LogicalPx, LogicalPx>;
20
21pub type ScaleFactor = euclid::Scale<f32, LogicalPx, PhysicalPx>;
22
23pub trait SizeLengths {
24    type LengthType;
25    fn width_length(&self) -> Self::LengthType;
26    fn height_length(&self) -> Self::LengthType;
27}
28
29impl<T: Copy, U> SizeLengths for euclid::Size2D<T, U> {
30    type LengthType = euclid::Length<T, U>;
31    fn width_length(&self) -> Self::LengthType {
32        euclid::Length::new(self.width)
33    }
34    fn height_length(&self) -> Self::LengthType {
35        euclid::Length::new(self.height)
36    }
37}
38
39pub trait PointLengths {
40    type LengthType;
41    fn x_length(&self) -> Self::LengthType;
42    fn y_length(&self) -> Self::LengthType;
43}
44
45impl<T: Copy, U> PointLengths for euclid::Point2D<T, U> {
46    type LengthType = euclid::Length<T, U>;
47    fn x_length(&self) -> Self::LengthType {
48        euclid::Length::new(self.x)
49    }
50    fn y_length(&self) -> Self::LengthType {
51        euclid::Length::new(self.y)
52    }
53}
54
55impl<T: Copy, U> PointLengths for euclid::Vector2D<T, U> {
56    type LengthType = euclid::Length<T, U>;
57    fn x_length(&self) -> Self::LengthType {
58        euclid::Length::new(self.x)
59    }
60    fn y_length(&self) -> Self::LengthType {
61        euclid::Length::new(self.y)
62    }
63}
64
65pub trait RectLengths {
66    type SizeType;
67    type LengthType;
68    fn size_length(&self) -> Self::SizeType;
69    fn width_length(&self) -> Self::LengthType;
70    fn height_length(&self) -> Self::LengthType;
71}
72
73impl<T: Copy, U> RectLengths for euclid::Rect<T, U> {
74    type LengthType = euclid::Length<T, U>;
75    type SizeType = euclid::Size2D<T, U>;
76    fn size_length(&self) -> Self::SizeType {
77        euclid::Size2D::new(self.size.width, self.size.height)
78    }
79    fn width_length(&self) -> Self::LengthType {
80        self.size_length().width_length()
81    }
82    fn height_length(&self) -> Self::LengthType {
83        self.size_length().height_length()
84    }
85}
86
87/// Convert from the api size to the internal size
88/// (This doesn't use the `From` trait because it would expose the conversion to euclid in the public API)
89pub fn logical_size_from_api(size: crate::api::LogicalSize) -> LogicalSize {
90    size.to_euclid()
91}
92
93pub fn logical_point_from_api(position: crate::api::LogicalPosition) -> LogicalPoint {
94    position.to_euclid()
95}
96
97pub fn logical_position_to_api(pos: LogicalPoint) -> crate::api::LogicalPosition {
98    crate::api::LogicalPosition::from_euclid(pos)
99}
100
101pub fn logical_size_to_api(size: LogicalSize) -> crate::api::LogicalSize {
102    crate::api::LogicalSize::from_euclid(size)
103}
i_slint_core/lengths.rs

i_slint_core/
lengths.rs
