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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
use crate::conversion;
use crate::{Application, Color, Debug, Mode, Point, Size, Viewport};
use std::marker::PhantomData;
use winit::event::WindowEvent;
use winit::window::Window;
/// The state of a windowed [`Application`].
///
/// [`Application`]: ../trait.Application.html
#[derive(Debug, Clone)]
pub struct State<A: Application> {
title: String,
mode: Mode,
background_color: Color,
scale_factor: f64,
viewport: Viewport,
viewport_version: usize,
cursor_position: winit::dpi::PhysicalPosition<f64>,
modifiers: winit::event::ModifiersState,
application: PhantomData<A>,
}
impl<A: Application> State<A> {
/// Creates a new [`State`] for the provided [`Application`] and window.
///
/// [`State`]: struct.State.html
/// [`Application`]: ../trait.Application.html
pub fn new(application: &A, window: &Window) -> Self {
let title = application.title();
let mode = application.mode();
let background_color = application.background_color();
let scale_factor = application.scale_factor();
let viewport = {
let physical_size = window.inner_size();
Viewport::with_physical_size(
Size::new(physical_size.width, physical_size.height),
window.scale_factor() * scale_factor,
)
};
Self {
title,
mode,
background_color,
scale_factor,
viewport,
viewport_version: 0,
// TODO: Encode cursor availability in the type-system
cursor_position: winit::dpi::PhysicalPosition::new(-1.0, -1.0),
modifiers: winit::event::ModifiersState::default(),
application: PhantomData,
}
}
/// Returns the current background [`Color`] of the [`State`].
///
/// [`Color`]: ../struct.Color.html
/// [`State`]: struct.State.html
pub fn background_color(&self) -> Color {
self.background_color
}
/// Returns the current [`Viewport`] of the [`State`].
///
/// [`Viewport`]: ../struct.Viewport.html
/// [`State`]: struct.State.html
pub fn viewport(&self) -> &Viewport {
&self.viewport
}
/// Returns the version of the [`Viewport`] of the [`State`].
///
/// The version is incremented every time the [`Viewport`] changes.
///
/// [`Viewport`]: ../struct.Viewport.html
/// [`State`]: struct.State.html
pub fn viewport_version(&self) -> usize {
self.viewport_version
}
/// Returns the physical [`Size`] of the [`Viewport`] of the [`State`].
///
/// [`Size`]: ../struct.Size.html
/// [`Viewport`]: ../struct.Viewport.html
/// [`State`]: struct.State.html
pub fn physical_size(&self) -> Size<u32> {
self.viewport.physical_size()
}
/// Returns the logical [`Size`] of the [`Viewport`] of the [`State`].
///
/// [`Size`]: ../struct.Size.html
/// [`Viewport`]: ../struct.Viewport.html
/// [`State`]: struct.State.html
pub fn logical_size(&self) -> Size<f32> {
self.viewport.logical_size()
}
/// Returns the current scale factor of the [`Viewport`] of the [`State`].
///
/// [`Viewport`]: ../struct.Viewport.html
/// [`State`]: struct.State.html
pub fn scale_factor(&self) -> f64 {
self.viewport.scale_factor()
}
/// Returns the current cursor position of the [`State`].
///
/// [`State`]: struct.State.html
pub fn cursor_position(&self) -> Point {
conversion::cursor_position(
self.cursor_position,
self.viewport.scale_factor(),
)
}
/// Returns the current keyboard modifiers of the [`State`].
///
/// [`State`]: struct.State.html
pub fn modifiers(&self) -> winit::event::ModifiersState {
self.modifiers
}
/// Processes the provided window event and updates the [`State`]
/// accordingly.
///
/// [`State`]: struct.State.html
pub fn update(
&mut self,
window: &Window,
event: &WindowEvent<'_>,
_debug: &mut Debug,
) {
match event {
WindowEvent::Resized(new_size) => {
let size = Size::new(new_size.width, new_size.height);
self.viewport = Viewport::with_physical_size(
size,
window.scale_factor() * self.scale_factor,
);
self.viewport_version = self.viewport_version.wrapping_add(1);
}
WindowEvent::ScaleFactorChanged {
scale_factor: new_scale_factor,
new_inner_size,
} => {
let size =
Size::new(new_inner_size.width, new_inner_size.height);
self.viewport = Viewport::with_physical_size(
size,
new_scale_factor * self.scale_factor,
);
self.viewport_version = self.viewport_version.wrapping_add(1);
}
WindowEvent::CursorMoved { position, .. } => {
self.cursor_position = *position;
}
WindowEvent::CursorLeft { .. } => {
// TODO: Encode cursor availability in the type-system
self.cursor_position =
winit::dpi::PhysicalPosition::new(-1.0, -1.0);
}
WindowEvent::ModifiersChanged(new_modifiers) => {
self.modifiers = *new_modifiers;
}
#[cfg(feature = "debug")]
WindowEvent::KeyboardInput {
input:
winit::event::KeyboardInput {
virtual_keycode: Some(winit::event::VirtualKeyCode::F12),
state: winit::event::ElementState::Pressed,
..
},
..
} => _debug.toggle(),
_ => {}
}
}
/// Synchronizes the [`State`] with its [`Application`] and its respective
/// window.
///
/// Normally an [`Application`] should be synchronized with its [`State`]
/// and window after calling [`Application::update`].
///
/// [`State`]: struct.State.html
/// [`Application`]: ../trait.Application.html
/// [`Application::update`]: ../trait.Application.html#tymethod.update
pub fn synchronize(&mut self, application: &A, window: &Window) {
// Update window title
let new_title = application.title();
if self.title != new_title {
window.set_title(&new_title);
self.title = new_title;
}
// Update window mode
let new_mode = application.mode();
if self.mode != new_mode {
window.set_fullscreen(conversion::fullscreen(
window.current_monitor(),
new_mode,
));
self.mode = new_mode;
}
// Update background color
self.background_color = application.background_color();
// Update scale factor
let new_scale_factor = application.scale_factor();
if self.scale_factor != new_scale_factor {
let size = window.inner_size();
self.viewport = Viewport::with_physical_size(
Size::new(size.width, size.height),
window.scale_factor() * new_scale_factor,
);
self.scale_factor = new_scale_factor;
}
}
}
|
