1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
15 # Support services for Gamnit on GNU/Linux
21 intrude import display_linux
24 private var sdl_event_buffer
= new SDLEventBuffer.malloc
29 if display
== null then return
32 var avail
= sdl_event_buffer
.poll_event
33 if not avail
then break
35 # Convert to an SDL event with data
36 var sdl_event
= sdl_event_buffer
.to_event
37 if sdl_event
isa SDLWindowEvent and sdl_event
.is_resized
then
38 display
.width
= sdl_event
.data1
39 display
.height
= sdl_event
.data2
43 # Convert to `mnit::inputs` conforming objects
44 var gamnit_event
= sdl_event
.to_gamnit_event
(sdl_event_buffer
)
45 accept_event gamnit_event
51 # Redef services from `sdl2::events`
54 private fun to_gamnit_event
(buffer
: SDLEventBuffer): GamnitInputEvent
55 do return new GamnitOtherEvent(buffer
, self)
58 redef class SDLQuitEvent
59 redef fun to_gamnit_event
(buffer
) do return new GamnitQuitEvent(buffer
, self)
62 redef class SDLMouseEvent
63 redef fun to_gamnit_event
(buffer
) do return new GamnitPointerEvent(buffer
, self)
66 redef class SDLMouseWheelEvent
67 redef fun to_gamnit_event
(buffer
) do return new GamnitMouseWheelEvent(buffer
, self)
70 redef class SDLKeyboardEvent
71 redef fun to_gamnit_event
(buffer
) do return new GamnitKeyEvent(buffer
, self)
75 # Implement `mnit::inputs` interfaces
77 # SDL2 event wrapper implementing the `mnit::input` API
79 # There is two views to the underlying native object: `buffer` and `native`.
80 class GamnitInputEvent
83 # Native SDL 2 event buffer with the pseudo class hierarchy metadata
84 var buffer
: SDLEventBuffer
89 # Type of the `native` underlying SDL 2 event
93 # Event on user requested quit
95 super GamnitInputEvent
98 redef type NATIVE: SDLQuitEvent
101 # Event on keyboard input
103 super GamnitInputEvent
106 redef type NATIVE: SDLKeyboardEvent
108 redef fun is_down
do return buffer
.is_keydown
109 redef fun is_up
do return buffer
.is_keyup
110 redef fun is_arrow_up
do return native
.keysym
.is_up
111 redef fun is_arrow_left
do return native
.keysym
.is_left
112 redef fun is_arrow_down
do return native
.keysym
.is_down
113 redef fun is_arrow_right
do return native
.keysym
.is_right
114 redef fun to_c
do return native
.to_s
.chars
.first
115 redef fun name
do return native
.to_s
.to_lower
118 # Event on pointer, mouse and finger input
119 class GamnitPointerEvent
120 super GamnitInputEvent
123 redef type NATIVE: SDLMouseEvent
125 redef fun x
do return native
.x
.to_f
126 redef fun y
do return native
.y
.to_f
127 redef fun is_move
do return buffer
.is_mouse_motion
132 if native
isa SDLMouseButtonEvent then
133 return native
.pressed
and native
.button
== 1
134 else if native
isa SDLMouseMotionEvent then
135 return native
.state
& 1 == 1
140 # Event on mouse wheel input
141 class GamnitMouseWheelEvent
142 super GamnitInputEvent
144 redef type NATIVE: SDLMouseWheelEvent
146 # Horizontal scroll amount
147 fun x
: Float do return native
.x
.to_f
149 # Vertical scroll amount
150 fun y
: Float do return native
.y
.to_f
153 # SDL2 event not handled by gamnit
154 class GamnitOtherEvent
155 super GamnitInputEvent