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
|
use std::mem;
use std::rc::Rc;
use std::cell::RefCell;
use std::sync::mpsc::Sender;
use Event;
use super::event;
use user32;
use winapi;
/// Stores the current window and its events dispatcher.
///
/// We only have one window per thread. We still store the HWND in case where we
/// receive an event for another window.
thread_local!(pub static WINDOW: Rc<RefCell<Option<(winapi::HWND, Sender<Event>)>>> = Rc::new(RefCell::new(None)));
/// Checks that the window is the good one, and if so send the event to it.
fn send_event(input_window: winapi::HWND, event: Event) {
WINDOW.with(|window| {
let window = window.borrow();
let stored = match *window {
None => return,
Some(ref v) => v
};
let &(ref win, ref sender) = stored;
if win != &input_window {
return;
}
sender.send(event).ok(); // ignoring if closed
});
}
/// This is the callback that is called by `DispatchMessage` in the events loop.
///
/// Returning 0 tells the Win32 API that the message has been processed.
pub unsafe extern "system" fn callback(window: winapi::HWND, msg: winapi::UINT,
wparam: winapi::WPARAM, lparam: winapi::LPARAM)
-> winapi::LRESULT
{
match msg {
winapi::WM_DESTROY => {
use events::Event::Closed;
WINDOW.with(|w| {
let w = w.borrow();
let &(ref win, _) = match *w {
None => return,
Some(ref v) => v
};
if win == &window {
user32::PostQuitMessage(0);
}
});
send_event(window, Closed);
0
},
winapi::WM_ERASEBKGND => {
1
},
winapi::WM_SIZE => {
use events::Event::Resized;
let w = winapi::LOWORD(lparam as winapi::DWORD) as u32;
let h = winapi::HIWORD(lparam as winapi::DWORD) as u32;
send_event(window, Resized(w, h));
0
},
winapi::WM_MOVE => {
use events::Event::Moved;
let x = winapi::LOWORD(lparam as winapi::DWORD) as i32;
let y = winapi::HIWORD(lparam as winapi::DWORD) as i32;
send_event(window, Moved(x, y));
0
},
winapi::WM_CHAR => {
use std::mem;
use events::Event::ReceivedCharacter;
let chr: char = mem::transmute(wparam as u32);
send_event(window, ReceivedCharacter(chr));
0
},
winapi::WM_MOUSEMOVE => {
use events::Event::MouseMoved;
let x = winapi::GET_X_LPARAM(lparam) as i32;
let y = winapi::GET_Y_LPARAM(lparam) as i32;
send_event(window, MouseMoved((x, y)));
0
},
winapi::WM_MOUSEWHEEL => {
use events::Event::MouseWheel;
let value = (wparam >> 16) as i16;
let value = value as i32;
send_event(window, MouseWheel(value));
0
},
winapi::WM_KEYDOWN => {
use events::Event::KeyboardInput;
use events::ElementState::Pressed;
let scancode = ((lparam >> 16) & 0xff) as u8;
let vkey = event::vkeycode_to_element(wparam);
send_event(window, KeyboardInput(Pressed, scancode, vkey));
0
},
winapi::WM_KEYUP => {
use events::Event::KeyboardInput;
use events::ElementState::Released;
let scancode = ((lparam >> 16) & 0xff) as u8;
let vkey = event::vkeycode_to_element(wparam);
send_event(window, KeyboardInput(Released, scancode, vkey));
0
},
winapi::WM_LBUTTONDOWN => {
use events::Event::MouseInput;
use events::MouseButton::Left;
use events::ElementState::Pressed;
send_event(window, MouseInput(Pressed, Left));
0
},
winapi::WM_LBUTTONUP => {
use events::Event::MouseInput;
use events::MouseButton::Left;
use events::ElementState::Released;
send_event(window, MouseInput(Released, Left));
0
},
winapi::WM_RBUTTONDOWN => {
use events::Event::MouseInput;
use events::MouseButton::Right;
use events::ElementState::Pressed;
send_event(window, MouseInput(Pressed, Right));
0
},
winapi::WM_RBUTTONUP => {
use events::Event::MouseInput;
use events::MouseButton::Right;
use events::ElementState::Released;
send_event(window, MouseInput(Released, Right));
0
},
winapi::WM_MBUTTONDOWN => {
use events::Event::MouseInput;
use events::MouseButton::Middle;
use events::ElementState::Pressed;
send_event(window, MouseInput(Pressed, Middle));
0
},
winapi::WM_MBUTTONUP => {
use events::Event::MouseInput;
use events::MouseButton::Middle;
use events::ElementState::Released;
send_event(window, MouseInput(Released, Middle));
0
},
winapi::WM_INPUT => {
let mut data: winapi::RAWINPUT = mem::uninitialized();
let mut data_size = mem::size_of::<winapi::RAWINPUT>() as winapi::UINT;
user32::GetRawInputData(mem::transmute(lparam), winapi::RID_INPUT,
mem::transmute(&mut data), &mut data_size,
mem::size_of::<winapi::RAWINPUTHEADER>() as winapi::UINT);
if data.header.dwType == winapi::RIM_TYPEMOUSE {
let _x = data.mouse.lLastX; // FIXME: this is not always the relative movement
let _y = data.mouse.lLastY;
// TODO:
//send_event(window, Event::MouseRawMovement { x: x, y: y });
0
} else {
user32::DefWindowProcW(window, msg, wparam, lparam)
}
},
winapi::WM_SETFOCUS => {
use events::Event::Focused;
send_event(window, Focused(true));
0
},
winapi::WM_KILLFOCUS => {
use events::Event::Focused;
send_event(window, Focused(false));
0
},
_ => {
user32::DefWindowProcW(window, msg, wparam, lparam)
}
}
}
|
