polyhorn_ui/styles/
scrollable.rs

1use super::ViewStyle;
2use crate::geometry::{ByEdge, Dimension};
3
4/// Color of the scroll bars of a Scrollable.
5#[derive(Copy, Clone, Debug, Eq, PartialEq)]
6pub enum ScrollbarColor {
7    /// This variant lets the OS decide which color to use. The OS may look at
8    /// the appearance mode chosen by the user (i.e. light vs. dark mode) and/or
9    /// at the content that is shown in the scrollable (e.g. to determine which
10    /// color would have the highest contrast with respect to the content
11    /// underlying).
12    Auto,
13
14    /// This is a dark scroll bar. Use this only if the underlying content is
15    /// light.
16    Dark,
17
18    /// This is a light scroll bar. Use this only if the underlying content is
19    /// dark.
20    Light,
21}
22
23impl Default for ScrollbarColor {
24    fn default() -> Self {
25        ScrollbarColor::Auto
26    }
27}
28
29/// Controls the appearance of a Scrollable.
30#[derive(Copy, Clone, Debug, Default, PartialEq)]
31pub struct ScrollableStyle {
32    /// Controls the distance between the scrollable content and each edge of a
33    /// rectangle.
34    pub scroll_padding: ByEdge<Dimension<f32>>,
35
36    /// This field controls the appearance of scroll bars used in this
37    /// Scrollable. When set to Default, the scroll bar's appearance is
38    /// automatically updated when the OS indicates that the user has changed
39    /// its appearance mode, or when the OS chooses its own style depending on
40    /// the brightness of underlying content and recommends a different style
41    /// than is currently shown.
42    pub scrollbar_color: ScrollbarColor,
43
44    /// Controls the distance between the scrollbars and each edge of a
45    /// rectangle.
46    pub scrollbar_padding: ByEdge<Dimension<f32>>,
47}
48
49/// This is a union style of the Scrollable and View styles.
50#[derive(Copy, Clone, Debug, Default, PartialEq)]
51pub struct ScrollableViewStyle {
52    /// This style contains the properties that are only applicable to
53    /// Scrollables.
54    pub scrollable: ScrollableStyle,
55
56    /// This style contains the properties that are only applicable to
57    /// Views.
58    pub view: ViewStyle,
59}
60
61impl From<ScrollableStyle> for ScrollableViewStyle {
62    fn from(style: ScrollableStyle) -> Self {
63        ScrollableViewStyle {
64            scrollable: style,
65            ..Default::default()
66        }
67    }
68}
69
70impl From<ViewStyle> for ScrollableViewStyle {
71    fn from(style: ViewStyle) -> Self {
72        ScrollableViewStyle {
73            view: style,
74            ..Default::default()
75        }
76    }
77}
polyhorn_ui/styles/scrollable.rs

polyhorn_ui/styles/
scrollable.rs
