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sdl_input.c
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/* sz81 Copyright (C) 2007-2011 Thunor <thunorsif@hotmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Includes */
#include "sdl_engine.h"
#include "common.h"
/* Defines */
#define MAX_KEYSYMS (138 + 6)
#define JOYDEADZONE (32767 * joystick_dead_zone / 100)
/* Extended SDL state definitions */
#define SDL_DRAGGED 2
/* Cursor (virtual) device control IDs */
#define CURSOR_REMAP 32762
#define CURSOR_N 32763
#define CURSOR_S 32764
#define CURSOR_W 32765
#define CURSOR_E 32766
#define CURSOR_HIT 32767
/* GP2X button IDs */
#define GP2X_JOY_N 0x00
#define GP2X_JOY_NW 0x01
#define GP2X_JOY_W 0x02
#define GP2X_JOY_SW 0x03
#define GP2X_JOY_S 0x04
#define GP2X_JOY_SE 0x05
#define GP2X_JOY_E 0x06
#define GP2X_JOY_NE 0x07
#define GP2X_START 0x08
#define GP2X_SELECT 0x09
#define GP2X_LTRIG 0x0A
#define GP2X_RTRIG 0x0B
#define GP2X_BTN_A 0x0C
#define GP2X_BTN_B 0x0D
#define GP2X_BTN_X 0x0E
#define GP2X_BTN_Y 0x0F
#define GP2X_VOL_UP 0x10
#define GP2X_VOL_DN 0x11
#define GP2X_BTN_JOY 0x12
/* Variables */
/* This records the last runtime options component viewed i.e. the page,
* and it's required so that it can be restored automatically */
int last_runopts_comp = COMP_RUNOPTS0;
/* SDL_PollEvent will extract useful information from an event and store
* it in these variables which are then used throughout this file.
* Occasionally device is set to UNDEFINED so that the control is ignored */
int device, id, mod_id, state;
/* SDL_PollEvent fills event and if something useful was found the data
* is extracted to the above variables. event can be and is later used
* to pass information to the key_repeat_manager, but that is simply for
* convenience. virtualevent is used in several places to push custom
* events and so there is no reason why event cannot be reused either */
SDL_Event event, virtualevent;
/* The last vkeyb state is sometimes recorded so that it can be restored */
int last_vkeyb_state;
/* This is used by the joystick configurator to store control ids */
int runopts_joy_cfg_id[12];
char *keysyms[] = {
"SDLK_UNKNOWN", "SDLK_FIRST", "SDLK_BACKSPACE", "SDLK_TAB", "SDLK_CLEAR",
"SDLK_RETURN", "SDLK_PAUSE", "SDLK_ESCAPE", "SDLK_SPACE", "SDLK_EXCLAIM",
"SDLK_QUOTEDBL", "SDLK_HASH", "SDLK_DOLLAR", "SDLK_AMPERSAND", "SDLK_QUOTE",
"SDLK_LEFTPAREN", "SDLK_RIGHTPAREN", "SDLK_ASTERISK", "SDLK_PLUS", "SDLK_COMMA",
"SDLK_MINUS", "SDLK_PERIOD", "SDLK_SLASH", "SDLK_0", "SDLK_1",
"SDLK_2", "SDLK_3", "SDLK_4", "SDLK_5", "SDLK_6",
"SDLK_7", "SDLK_8", "SDLK_9", "SDLK_COLON", "SDLK_SEMICOLON",
"SDLK_LESS", "SDLK_EQUALS", "SDLK_GREATER", "SDLK_QUESTION", "SDLK_AT",
"SDLK_LEFTBRACKET", "SDLK_BACKSLASH", "SDLK_RIGHTBRACKET", "SDLK_CARET", "SDLK_UNDERSCORE",
"SDLK_BACKQUOTE", "SDLK_a", "SDLK_b", "SDLK_c", "SDLK_d",
"SDLK_e", "SDLK_f", "SDLK_g", "SDLK_h", "SDLK_i",
"SDLK_j", "SDLK_k", "SDLK_l", "SDLK_m", "SDLK_n",
"SDLK_o", "SDLK_p", "SDLK_q", "SDLK_r", "SDLK_s",
"SDLK_t", "SDLK_u", "SDLK_v", "SDLK_w", "SDLK_x",
"SDLK_y", "SDLK_z", "SDLK_DELETE", "SDLK_KP0", "SDLK_KP1",
"SDLK_KP2", "SDLK_KP3", "SDLK_KP4", "SDLK_KP5", "SDLK_KP6",
"SDLK_KP7", "SDLK_KP8", "SDLK_KP9", "SDLK_KP_PERIOD", "SDLK_KP_DIVIDE",
"SDLK_KP_MULTIPLY", "SDLK_KP_MINUS", "SDLK_KP_PLUS", "SDLK_KP_ENTER", "SDLK_KP_EQUALS",
"SDLK_UP", "SDLK_DOWN", "SDLK_RIGHT", "SDLK_LEFT", "SDLK_INSERT",
"SDLK_HOME", "SDLK_END", "SDLK_PAGEUP", "SDLK_PAGEDOWN", "SDLK_F1",
"SDLK_F2", "SDLK_F3", "SDLK_F4", "SDLK_F5", "SDLK_F6",
"SDLK_F7", "SDLK_F8", "SDLK_F9", "SDLK_F10", "SDLK_F11",
"SDLK_F12", "SDLK_F13", "SDLK_F14", "SDLK_F15", "SDLK_NUMLOCK",
"SDLK_CAPSLOCK", "SDLK_SCROLLOCK", "SDLK_RSHIFT", "SDLK_LSHIFT", "SDLK_RCTRL",
"SDLK_LCTRL", "SDLK_RALT", "SDLK_LALT", "SDLK_RMETA", "SDLK_LMETA",
"SDLK_LSUPER", "SDLK_RSUPER", "SDLK_MODE", "SDLK_COMPOSE", "SDLK_HELP",
"SDLK_PRINT", "SDLK_SYSREQ", "SDLK_BREAK", "SDLK_MENU", "SDLK_POWER",
"SDLK_EURO", "SDLK_UNDO", "SDLK_LAST", "CURSOR_REMAP", "CURSOR_N",
"CURSOR_S", "CURSOR_W", "CURSOR_E", "CURSOR_HIT"};
int keycodes[] = {
SDLK_UNKNOWN, SDLK_FIRST, SDLK_BACKSPACE, SDLK_TAB, SDLK_CLEAR,
SDLK_RETURN, SDLK_PAUSE, SDLK_ESCAPE, SDLK_SPACE, SDLK_EXCLAIM,
SDLK_QUOTEDBL, SDLK_HASH, SDLK_DOLLAR, SDLK_AMPERSAND, SDLK_QUOTE,
SDLK_LEFTPAREN, SDLK_RIGHTPAREN, SDLK_ASTERISK, SDLK_PLUS, SDLK_COMMA,
SDLK_MINUS, SDLK_PERIOD, SDLK_SLASH, SDLK_0, SDLK_1,
SDLK_2, SDLK_3, SDLK_4, SDLK_5, SDLK_6,
SDLK_7, SDLK_8, SDLK_9, SDLK_COLON, SDLK_SEMICOLON,
SDLK_LESS, SDLK_EQUALS, SDLK_GREATER, SDLK_QUESTION, SDLK_AT,
SDLK_LEFTBRACKET, SDLK_BACKSLASH, SDLK_RIGHTBRACKET, SDLK_CARET, SDLK_UNDERSCORE,
SDLK_BACKQUOTE, SDLK_a, SDLK_b, SDLK_c, SDLK_d,
SDLK_e, SDLK_f, SDLK_g, SDLK_h, SDLK_i,
SDLK_j, SDLK_k, SDLK_l, SDLK_m, SDLK_n,
SDLK_o, SDLK_p, SDLK_q, SDLK_r, SDLK_s,
SDLK_t, SDLK_u, SDLK_v, SDLK_w, SDLK_x,
SDLK_y, SDLK_z, SDLK_DELETE, SDLK_KP0, SDLK_KP1,
SDLK_KP2, SDLK_KP3, SDLK_KP4, SDLK_KP5, SDLK_KP6,
SDLK_KP7, SDLK_KP8, SDLK_KP9, SDLK_KP_PERIOD, SDLK_KP_DIVIDE,
SDLK_KP_MULTIPLY, SDLK_KP_MINUS, SDLK_KP_PLUS, SDLK_KP_ENTER, SDLK_KP_EQUALS,
SDLK_UP, SDLK_DOWN, SDLK_RIGHT, SDLK_LEFT, SDLK_INSERT,
SDLK_HOME, SDLK_END, SDLK_PAGEUP, SDLK_PAGEDOWN, SDLK_F1,
SDLK_F2, SDLK_F3, SDLK_F4, SDLK_F5, SDLK_F6,
SDLK_F7, SDLK_F8, SDLK_F9, SDLK_F10, SDLK_F11,
SDLK_F12, SDLK_F13, SDLK_F14, SDLK_F15, SDLK_NUMLOCK,
SDLK_CAPSLOCK, SDLK_SCROLLOCK, SDLK_RSHIFT, SDLK_LSHIFT, SDLK_RCTRL,
SDLK_LCTRL, SDLK_RALT, SDLK_LALT, SDLK_RMETA, SDLK_LMETA,
SDLK_LSUPER, SDLK_RSUPER, SDLK_MODE, SDLK_COMPOSE, SDLK_HELP,
SDLK_PRINT, SDLK_SYSREQ, SDLK_BREAK, SDLK_MENU, SDLK_POWER,
SDLK_EURO, SDLK_UNDO, SDLK_LAST, CURSOR_REMAP, CURSOR_N,
CURSOR_S, CURSOR_W, CURSOR_E, CURSOR_HIT};
/* Function prototypes */
void manage_cursor_input(void);
void manage_all_input(void);
void manage_dialog_input(void);
void manage_vkeyb_input(void);
void toggle_vkeyb_state(void);
void manage_runopts_input(void);
void toggle_runopts_state(void);
void manage_ldfile_input(void);
void manage_sstate_input(void);
/***************************************************************************
* Keyboard Initialise *
***************************************************************************/
/* This initialises the keyboard buffer, opens joystick 0 if available
* and sets up the control remappings. It's only called once */
void sdl_keyboard_init(void) {
int count, index;
/* Erase the keyboard buffer */
for (count = 0; count < MAX_KEYCODES; count++)
keyboard_buffer[count] = SDL_RELEASED;
/* Undefine all the control remappings */
for (count = 0; count < MAX_CTRL_REMAPS; count++) {
ctrl_remaps[count].components = UNDEFINED;
ctrl_remaps[count].protected = UNDEFINED;
ctrl_remaps[count].device = UNDEFINED;
ctrl_remaps[count].id = UNDEFINED;
ctrl_remaps[count].remap_device = UNDEFINED;
ctrl_remaps[count].remap_id = UNDEFINED;
ctrl_remaps[count].remap_mod_id = UNDEFINED;
}
/* Open joystick 0 if available */
SDL_JoystickEventState(SDL_ENABLE);
joystick = SDL_JoystickOpen(0);
if (joystick) {
fprintf(stdout, "Joystick opened: 0:%s\n", SDL_JoystickName(0));
/* Flush events as opening a joystick releases all the buttons */
while (SDL_PollEvent (&event));
#ifdef SDL_DEBUG_JOYSTICK
printf("%s: SDL_JoystickNumAxes=%i SDL_JoystickNumButtons=%i\n",
__func__, SDL_JoystickNumAxes(joystick),
SDL_JoystickNumButtons(joystick));
#endif
}
/* Set some default controls for platform */
index = -1;
/* Keyboard to keyboard */
/* Universally active */
ctrl_remaps[++index].components = COMP_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_RSHIFT;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_LSHIFT;
/* Active within emulator/vkeyb/ctb */
ctrl_remaps[++index].components = COMP_EMU | COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_UP;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_7;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
ctrl_remaps[++index].components = COMP_EMU | COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_DOWN;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_6;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
ctrl_remaps[++index].components = COMP_EMU | COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_LEFT;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_5;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
ctrl_remaps[++index].components = COMP_EMU | COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_RIGHT;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_8;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
ctrl_remaps[++index].components = COMP_EMU | COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_BACKSPACE;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_0;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
ctrl_remaps[++index].components = COMP_EMU | COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_COMMA;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_PERIOD;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
/* Active within the load selector only */
ctrl_remaps[++index].components = COMP_LOAD;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_PAGEUP;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_q;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
ctrl_remaps[++index].components = COMP_LOAD;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_PAGEDOWN;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_a;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
/* Active within dialog/ldfile/sstate/runopts */
ctrl_remaps[++index].components = COMP_DIALOG | COMP_LDFILE | COMP_SSTATE | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_LEFT;
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_W;
ctrl_remaps[++index].components = COMP_DIALOG | COMP_LDFILE | COMP_SSTATE | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_RIGHT;
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_E;
ctrl_remaps[++index].components = COMP_DIALOG | COMP_LDFILE | COMP_SSTATE | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_RETURN;
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_HIT;
/* Active within sstate/runopts */
ctrl_remaps[++index].components = COMP_SSTATE | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_UP;
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_N;
ctrl_remaps[++index].components = COMP_SSTATE | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_KEYBOARD;
ctrl_remaps[index].id = SDLK_DOWN;
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_S;
/* Joystick to some other device.
* Platform specific joysticks can be hardcoded with some defaults
* here but otherwise their configurations should be entirely read
* in from the rcfile since their button/axis layouts are unknown */
if (joystick) {
#if defined(PLATFORM_GP2X)
/* Universally active */
ctrl_remaps[++index].components = COMP_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_START;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_F1;
ctrl_remaps[++index].components = COMP_EMU | COMP_LDFILE;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_SELECT;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_F3;
/* Active within emulator only */
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_JOY_N;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_q;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_JOY_S;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_a;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_JOY_W;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_o;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_JOY_E;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_p;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_BTN_Y;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_0;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_BTN_X;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_SPACE;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_BTN_A;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_RETURN;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_BTN_B;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_RETURN;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_LTRIG;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_LSHIFT;
/* Active within the load selector only */
ctrl_remaps[++index].components = COMP_LOAD;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_JOY_N;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_q;
ctrl_remaps[++index].components = COMP_LOAD;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_JOY_S;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_a;
ctrl_remaps[++index].components = COMP_LOAD;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_LTRIG;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_q;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
ctrl_remaps[++index].components = COMP_LOAD;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_RTRIG;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_a;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
/* Active within ldfile only */
ctrl_remaps[++index].components = COMP_LDFILE;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_JOY_N;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_UP;
ctrl_remaps[++index].components = COMP_LDFILE;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_JOY_S;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_DOWN;
/* Active within load/ldfile/sstate/vkeyb/ctb/runopts */
ctrl_remaps[++index].components = COMP_VKEYB | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_SELECT;
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_REMAP;
ctrl_remaps[++index].components = COMP_SSTATE | COMP_VKEYB | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_JOY_N;
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_N;
ctrl_remaps[++index].components = COMP_SSTATE | COMP_VKEYB | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_JOY_S;
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_S;
ctrl_remaps[++index].components = COMP_ALL & ~COMP_EMU;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_JOY_W;
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_W;
ctrl_remaps[++index].components = COMP_ALL & ~COMP_EMU;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_JOY_E;
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_E;
ctrl_remaps[++index].components = COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_BTN_Y;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_0;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
ctrl_remaps[++index].components = COMP_LOAD | COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_BTN_X;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_SPACE;
ctrl_remaps[++index].components = COMP_ALL & ~COMP_EMU;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_BTN_A;
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_HIT;
ctrl_remaps[++index].components = COMP_LOAD | COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_BTN_B;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_RETURN;
ctrl_remaps[++index].components = COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_LTRIG;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_LSHIFT;
/* Active within ldfile/runopts */
ctrl_remaps[++index].components = COMP_LDFILE | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_LTRIG;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_PAGEUP;
ctrl_remaps[++index].components = COMP_LDFILE | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = GP2X_RTRIG;
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_PAGEDOWN;
#elif defined(PLATFORM_ZAURUS)
#elif defined(__amigaos4__)
#else
#ifdef SDL_DEBUG_JOYSTICK
if (strcmp(SDL_JoystickName(0),
"Microsoft SideWinder Game Pad Pro USB version 1.0") == 0) {
/* This is my own PC joystick which I've been using for testing */
/* Universally active */
ctrl_remaps[++index].components = COMP_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 5; /* Z */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_F1;
ctrl_remaps[++index].components = COMP_EMU | COMP_LDFILE;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 2; /* C */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_F3;
/* Active within emulator */
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 12; /* Up */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_q;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 13; /* Down */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_a;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 10; /* Left */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_o;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 11; /* Right */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_p;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 4; /* Y */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_0;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 0; /* A */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_SPACE;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 3; /* X */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_RETURN;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 1; /* B */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_RETURN;
ctrl_remaps[++index].components = COMP_EMU;
ctrl_remaps[index].protected = FALSE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 6; /* LTrig */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_LSHIFT;
/* Active within the load selector only */
ctrl_remaps[++index].components = COMP_LOAD;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 12; /* Up */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_q;
ctrl_remaps[++index].components = COMP_LOAD;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 13; /* Down */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_a;
ctrl_remaps[++index].components = COMP_LOAD;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 6; /* LTrig */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_q;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
ctrl_remaps[++index].components = COMP_LOAD;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 7; /* RTrig */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_a;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
/* Active within ldfile only */
ctrl_remaps[++index].components = COMP_LDFILE;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 12; /* Up */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_UP;
ctrl_remaps[++index].components = COMP_LDFILE;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 13; /* Down */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_DOWN;
/* Active within load/ldfile/sstate/vkeyb/ctb/runopts */
ctrl_remaps[++index].components = COMP_VKEYB | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 2; /* C */
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_REMAP;
ctrl_remaps[++index].components = COMP_SSTATE | COMP_VKEYB | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 12; /* Up */
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_N;
ctrl_remaps[++index].components = COMP_SSTATE | COMP_VKEYB | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 13; /* Down */
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_S;
ctrl_remaps[++index].components = COMP_ALL & ~COMP_EMU;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 10; /* Left */
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_W;
ctrl_remaps[++index].components = COMP_ALL & ~COMP_EMU;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 11; /* Right */
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_E;
ctrl_remaps[++index].components = COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 4; /* Y */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_0;
ctrl_remaps[index].remap_mod_id = SDLK_LSHIFT;
ctrl_remaps[++index].components = COMP_LOAD | COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 0; /* A */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_SPACE;
ctrl_remaps[++index].components = COMP_ALL & ~COMP_EMU;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 3; /* X */
ctrl_remaps[index].remap_device = DEVICE_CURSOR;
ctrl_remaps[index].remap_id = CURSOR_HIT;
ctrl_remaps[++index].components = COMP_LOAD | COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 1; /* B */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_RETURN;
ctrl_remaps[++index].components = COMP_VKEYB;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 6; /* LTrig */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_LSHIFT;
/* Active within ldfile/runopts */
ctrl_remaps[++index].components = COMP_LDFILE | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 6; /* LTrig */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_PAGEUP;
ctrl_remaps[++index].components = COMP_LDFILE | COMP_RUNOPTS_ALL;
ctrl_remaps[index].protected = TRUE;
ctrl_remaps[index].device = DEVICE_JOYSTICK;
ctrl_remaps[index].id = 7; /* RTrig */
ctrl_remaps[index].remap_device = DEVICE_KEYBOARD;
ctrl_remaps[index].remap_id = SDLK_PAGEDOWN;
}
#endif
#endif
}
#ifdef SDL_DEBUG_EVENTS
printf("%s: ctrl_remaps index=%i\n", __func__, index);
#endif
}
/***************************************************************************
* Keyboard Update *
***************************************************************************/
/* I was experiencing an issue that was highlighted by pointer hotspot input
* whereby the emulator or emulated machine wasn't processing the events
* quickly enough and key presses were getting released before the pressed
* state was recorded. I fixed this by adding a flag to skip every other
* update which solves this problem beautifully.
*
* +-------------------------+
* | Physical hardware input |
* +-------------------------+
* |
* v
* +-------------------------+
* | Dynamic virtual input |
* +-------------------------+
* |
* v
* +-------------------------+
* | Target actions |
* +-------------------------+
*
* On exit: returns non-zero if there are keyboard events else 0 */
int keyboard_update(void) {
static int skip_update = TRUE, skip_drag = TRUE, last_hs_pressed[2];
static int axisstates[MAX_JOY_AXES * 2], init = TRUE;
int eventfound = FALSE, count, found;
struct Notification notification;
int hs_vkeyb_ctb_selected;
int hs_runopts_selected;
int axis_end = 0;
SDLMod modstate;
#ifdef SDL_DEBUG_TIMING
static Uint32 lasttime = 0;
static int Hz = 0;
Hz++;
if (SDL_GetTicks() - lasttime >= 1000) {
printf("%s=%iHz\n", __func__, Hz);
lasttime = SDL_GetTicks();
Hz = 0;
}
#endif
/* Do some first time initialisation */
if (init) {
init = FALSE;
last_hs_pressed[0] = last_hs_pressed[1] = UNDEFINED;
for (count = 0; count < MAX_JOY_AXES; count++)
axisstates[count * 2] = axisstates[count * 2 + 1] = SDL_RELEASED;
/* Flush events (may have been done earlier too when opening a joystick */
while (SDL_PollEvent (&event));
event.type = SDL_NOEVENT; /* Important */
}
/* Process events every other call otherwise the emulator or the
* emulated machine has trouble keeping up with event creation */
if (!(skip_update = !skip_update)) {
/* If there's something to repeat then maybe do it now. As this
* is done inside the skip-update the default granularity is
* 40ms: 1000ms / (50Hz / 2) but this can change if the emulation
* speed is altered e.g. 1000ms / (80Hz / 2) = 25ms */
key_repeat_manager(KRM_FUNC_TICK, NULL, 0);
while (SDL_PollEvent(&event)) {
/* Get something we're interested in */
device = id = mod_id = state = UNDEFINED;
switch (event.type) {
case SDL_KEYUP:
case SDL_KEYDOWN:
device = DEVICE_KEYBOARD;
id = event.key.keysym.sym;
state = event.key.state;
break;
case SDL_MOUSEMOTION:
/* Added in 2.1.7: if a hotspot has the draggable property set
* then it can additionally experience mouse motion events.
* It's implemented here by setting SDL_DRAGGED as the state,
* therefore any control/hotspot processing code should expect
* to receive SDL_PRESSED, SDL_RELEASED and SDL_DRAGGED states.
*
* Note that I'm dropping many of the SDL_MOUSEMOTION events
* because by default this is running at 50Hz / 2 and they are
* far too numerous and flood the event queue and this system */
if (skip_drag++ >= 4) {
skip_drag = 0;
count = last_hs_pressed[0];
if (count == UNDEFINED) count = last_hs_pressed[1];
if (count != UNDEFINED) {
if (hotspots[count].gid != UNDEFINED &&
hotspots[count].flags & HS_PROP_VISIBLE &&
hotspots[count].flags & HS_PROP_DRAGGABLE &&
hotspots[count].remap_id != UNDEFINED &&
keyboard_buffer[hotspots[count].remap_id] == SDL_PRESSED) {
device = DEVICE_KEYBOARD;
id = hotspots[count].remap_id;
state = SDL_DRAGGED;
}
}
}
break;
case SDL_MOUSEBUTTONUP:
case SDL_MOUSEBUTTONDOWN:
/* This code is also visited by joystick button events
* masquerading as mouse button events. To enable them
* to coexit peacefully, the joy buttons start at 128 */
if (event.button.button % 128 == SDL_BUTTON_LEFT) {
device = DEVICE_KEYBOARD;
state = event.button.state;
/* Convert a hotspot hit into an id */
found = FALSE;
if (state == SDL_PRESSED) {
for (count = MAX_HOTSPOTS - 1; count >= 0; count--) {
if (hotspots[count].gid != UNDEFINED &&
hotspots[count].flags & HS_PROP_VISIBLE &&
event.button.x >= hotspots[count].hit_x &&
event.button.x < hotspots[count].hit_x + hotspots[count].hit_w &&
event.button.y >= hotspots[count].hit_y &&
event.button.y < hotspots[count].hit_y + hotspots[count].hit_h) {
if (hotspots[count].remap_id != UNDEFINED) {
/* Is the hotspot sticky or a toggle? */
if (hotspots[count].flags & HS_PROP_STICKY ||
hotspots[count].flags & HS_PROP_TOGGLE) {
/* If it's currently stuck then release it */
if (hotspots[count].flags & HS_PROP_STUCK) {
hotspots[count].flags &= ~HS_PROP_STUCK;
state = SDL_RELEASED;
} else {
hotspots[count].flags |= HS_PROP_STUCK;
}
}
id = hotspots[count].remap_id;
last_hs_pressed[event.button.button / 128] = count;
found = TRUE;
}
break;
}
}
} else {
if (hotspots[last_hs_pressed[event.button.button / 128]].flags &
HS_PROP_ONOFF) {
/* If a virtual keyboard hotspot was last pressed
* then release stuck sticky hotspots */
if (hotspots[last_hs_pressed[event.button.button / 128]].gid ==
HS_GRP_VKEYB) {
for (count = MAX_HOTSPOTS - 1; count >= 0; count--) {
if (hotspots[count].gid != UNDEFINED &&
hotspots[count].flags & HS_PROP_STICKY &&
hotspots[count].flags & HS_PROP_STUCK) {
hotspots[count].flags &= ~HS_PROP_STUCK;
virtualevent.type = SDL_KEYUP;
virtualevent.key.keysym.sym = hotspots[count].remap_id;
virtualevent.key.state = SDL_RELEASED;
SDL_PushEvent(&virtualevent);
}
}
}
id = hotspots[last_hs_pressed[event.button.button / 128]].remap_id;
last_hs_pressed[event.button.button / 128] = UNDEFINED;
found = TRUE;
}
}
if (!found) device = UNDEFINED; /* Ignore id */
} else if (event.button.button == SDL_BUTTON_WHEELUP ||
event.button.button == SDL_BUTTON_WHEELDOWN) {
/* Remap mouse wheel movement to SDLK_MULTIUP & SDLK_MULTIDOWN */
device = DEVICE_KEYBOARD;
if (event.button.button == SDL_BUTTON_WHEELUP) {
id = SDLK_MULTIUP;
} else {
id = SDLK_MULTIDOWN;
}
if (event.type == SDL_MOUSEBUTTONUP) {
state = SDL_RELEASED;
} else {
state = SDL_PRESSED;
}
}
break;
case SDL_JOYBUTTONUP:
case SDL_JOYBUTTONDOWN:
device = DEVICE_JOYSTICK;
id = event.jbutton.button;
state = event.jbutton.state;
break;
case SDL_JOYAXISMOTION:
/* The following joy axis code I wrote for the GNU Robbo project :-
*
* The axis motion will be reported as a value from -32768 to +32767
* with 0 being the theoretical middle point. Some analogue joysticks
* are actually digital and offer limited analogue functionality by
* firing off a few values throughout this range (these joysticks will
* tend to rest at 0) whilst a truly analogue joystick will fire lots
* of different values with the middle firing anything but 0. The
* JOYDEADZONE offers us a reasonable user configurable middle region.
*
* To simulate digital on/off button functionality from an analogue
* axis we need to record previous axis motion activity so that we can
* see if we've already generated an SDL_JOYBUTTONDOWN/UP event. This
* activity is stored within the axisstates array as pairs of values
* representing both ends of an axis, with each value belonging to a
* virtual button. The first integer records the up/down state of the
* negative end of an axis with the positive end stored in the other.
*
* Following are the situations that this code will account for :-
* SDL_JOYBUTTONDOWN - axis middle to any axis end
* SDL_JOYBUTTONDOWN - one axis end to another axis end with the
* opposite end generating SDL_JOYBUTTONUP
* SDL_JOYBUTTONUP - any axis end to the middle */
#ifdef SDL_DEBUG_JOYSTICK
printf("%s: axis=%i value=%i\n", __func__,
event.jaxis.axis, event.jaxis.value);
#endif
if (abs(event.jaxis.value) >= JOYDEADZONE) {
/* Identify which end of the axis we are operating upon:
* 0 for -32768 to JOYDEADZONE, 1 for JOYDEADZONE to +32767 */
axis_end = 0;
if (event.jaxis.value >= JOYDEADZONE) axis_end = 1;
if (axisstates[event.jaxis.axis * 2 + axis_end] == SDL_RELEASED) {
/* Generate a virtual joystick button event */
virtualevent.jbutton.button = event.jaxis.axis * 2 +
axis_end + SDL_JoystickNumButtons (joystick);
virtualevent.type = SDL_JOYBUTTONDOWN;
virtualevent.jbutton.state = SDL_PRESSED;
SDL_PushEvent(&virtualevent);
/* Record its SDL_PRESSED state within axisstates */
axisstates[event.jaxis.axis * 2 + axis_end] = SDL_PRESSED;
}
/* Do we need to release the opposite end of the axis? */
if (axisstates[event.jaxis.axis * 2 + (1 - axis_end)] == SDL_PRESSED) {
/* Generate a virtual joystick button event */
virtualevent.jbutton.button = event.jaxis.axis * 2 +
(1 - axis_end) + SDL_JoystickNumButtons (joystick);
virtualevent.type = SDL_JOYBUTTONUP;
virtualevent.jbutton.state = SDL_RELEASED;
SDL_PushEvent(&virtualevent);
/* Record its SDL_RELEASED state within axisstates */
axisstates[event.jaxis.axis * 2 + (1 - axis_end)] = SDL_RELEASED;
}
} else {