1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
//! Display a widget over another.
use std::hash::Hash;
use iced_core::Rectangle;
use crate::widget::text::{self, Text};
use crate::{
event, layout, Clipboard, Element, Event, Hasher, Layout, Length, Point,
Widget,
};
/// An element to display a widget over another.
#[allow(missing_debug_implementations)]
pub struct Tooltip<'a, Message, Renderer: self::Renderer + text::Renderer> {
content: Element<'a, Message, Renderer>,
tooltip: Text<Renderer>,
position: Position,
}
impl<'a, Message, Renderer> Tooltip<'a, Message, Renderer>
where
Renderer: self::Renderer + text::Renderer,
{
/// Creates an empty [`Tooltip`].
///
/// [`Tooltip`]: struct.Tooltip.html
pub fn new(
content: impl Into<Element<'a, Message, Renderer>>,
tooltip: Text<Renderer>,
position: Position,
) -> Self {
Tooltip {
content: content.into(),
tooltip,
position,
}
}
}
/// The position of the tooltip. Defaults to following the cursor.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum Position {
/// The tooltip will follow the cursor.
FollowCursor,
/// The tooltip will appear on the top of the widget.
Top,
/// The tooltip will appear on the bottom of the widget.
Bottom,
/// The tooltip will appear on the left of the widget.
Left,
/// The tooltip will appear on the right of the widget.
Right,
}
impl<'a, Message, Renderer> Widget<Message, Renderer>
for Tooltip<'a, Message, Renderer>
where
Renderer: self::Renderer + text::Renderer,
{
fn width(&self) -> Length {
self.content.width()
}
fn height(&self) -> Length {
self.content.height()
}
fn layout(
&self,
renderer: &Renderer,
limits: &layout::Limits,
) -> layout::Node {
self.content.layout(renderer, limits)
}
fn on_event(
&mut self,
event: Event,
layout: Layout<'_>,
cursor_position: Point,
messages: &mut Vec<Message>,
renderer: &Renderer,
clipboard: Option<&dyn Clipboard>,
) -> event::Status {
self.content.widget.on_event(
event,
layout,
cursor_position,
messages,
renderer,
clipboard,
)
}
fn draw(
&self,
renderer: &mut Renderer,
defaults: &Renderer::Defaults,
layout: Layout<'_>,
cursor_position: Point,
viewport: &Rectangle,
) -> Renderer::Output {
self::Renderer::draw(
renderer,
defaults,
cursor_position,
layout,
viewport,
&self.content,
&self.tooltip,
self.position,
)
}
fn hash_layout(&self, state: &mut Hasher) {
struct Marker;
std::any::TypeId::of::<Marker>().hash(state);
self.content.hash_layout(state);
}
}
/// The renderer of a [`Tooltip`].
///
/// Your [renderer] will need to implement this trait before being
/// able to use a [`Tooltip`] in your user interface.
///
/// [`Tooltip`]: struct.Tooltip.html
/// [renderer]: ../../renderer/index.html
pub trait Renderer: crate::Renderer + text::Renderer {
/// The style supported by this renderer.
type Style: Default;
/// Draws a [`Tooltip`].
///
/// [`Tooltip`]: struct.Tooltip.html
fn draw<Message>(
&mut self,
defaults: &Self::Defaults,
cursor_position: Point,
content_layout: Layout<'_>,
viewport: &Rectangle,
content: &Element<'_, Message, Self>,
tooltip: &Text<Self>,
position: Position,
) -> Self::Output;
}
impl<'a, Message, Renderer> From<Tooltip<'a, Message, Renderer>>
for Element<'a, Message, Renderer>
where
Renderer: 'a + self::Renderer + text::Renderer,
Message: 'a,
{
fn from(
column: Tooltip<'a, Message, Renderer>,
) -> Element<'a, Message, Renderer> {
Element::new(column)
}
}
|
