lib/gamnit/gamnit_linux.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   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
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   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.
  14
  15 # Support services for Gamnit on GNU/Linux
  16 module gamnit_linux
  17
  18 intrude import gamnit
  19 import display_linux
  20
  21 redef class App
  22         redef fun feed_events
  23         do
  24                 var display = display
  25                 if display == null then return
  26
  27                 var events = display.sdl_display.events
  28                 display.check_lock_cursor
  29                 for event in events do accept_event(event)
  30         end
  31 end
  32
  33 redef class GamnitDisplay
  34
  35         # HACK to keep the cursor in the center of the screen without producing move events
  36         private fun check_lock_cursor
  37         do
  38                 var sdl_display = sdl_display
  39                 if lock_cursor and sdl_display.input_focus then
  40                         sdl_display.ignore_mouse_motion_events = true
  41                         sdl_display.warp_mouse(width/2, height/2)
  42                         sdl_display.ignore_mouse_motion_events = false
  43                 end
  44         end
  45 end