firmware/target/hosted/android/button-android.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (c) 2010 Thomas Martitz
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22
  23 #include <jni.h>
  24 #include <stdbool.h>
  25 #include "button.h"
  26 #include "buttonmap.h"
  27 #include "config.h"
  28 #include "kernel.h"
  29 #include "system.h"
  30 #include "touchscreen.h"
  31
  32 static int last_y, last_x;
  33 static int last_btns;
  34 static long last_button_tick;
  35
  36 static enum {
  37     STATE_UNKNOWN,
  38     STATE_UP,
  39     STATE_DOWN,
  40 } last_touch_state = STATE_UNKNOWN;
  41
  42 /*
  43  * this notifies us in an interrupt-like fashion whether the user just
  44  * began or stopped the touch action + where (pixel coordinates) */
  45 JNIEXPORT void JNICALL
  46 Java_org_rockbox_RockboxFramebuffer_touchHandler(JNIEnv*env, jobject this,
  47                                                  bool down, int x, int y)
  48 {
  49     (void)env;
  50     (void)this;
  51
  52     if (down)
  53         last_touch_state = STATE_DOWN;
  54     else
  55         last_touch_state = STATE_UP;
  56
  57     last_x = x;
  58     last_y = y;
  59 }
  60
  61 /*
  62  * this writes in an interrupt-like fashion the button events that the user
  63  * generated by pressing/releasing them to a variable */
  64 JNIEXPORT bool JNICALL
  65 Java_org_rockbox_RockboxFramebuffer_buttonHandler(JNIEnv*env, jobject this,
  66                                                   int keycode, bool state)
  67 {
  68     (void)env;
  69     (void)this;
  70
  71     int button = key_to_button(keycode);
  72
  73     if (button == BUTTON_NONE)
  74         return false;
  75
  76     if (state)
  77     {
  78         last_btns |= button;
  79         last_button_tick = current_tick;
  80     }
  81     return true;
  82 }
  83
  84 void button_init_device(void)
  85 {
  86     last_button_tick = 0;
  87 }
  88
  89 int button_read_device(int *data)
  90 {
  91     int btn = last_btns;
  92     /* Get grid button/coordinates based on the current touchscreen mode
  93      *
  94      * Caveat: the caller seemingly depends on *data always being filled with
  95      *         the last known touchscreen position, so always call
  96      *         touchscreen_to_pixels() */
  97     int touch = touchscreen_to_pixels(last_x, last_y, data);
  98
  99     if (last_touch_state == STATE_DOWN)
 100         btn |= touch;
 101
 102     if (TIME_AFTER(current_tick, last_button_tick+5))
 103         last_btns = 0;
 104     return btn;
 105 }