diff options
| -rw-r--r-- | setup/joystick.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/setup/joystick.c b/setup/joystick.c index ce6a81ec..8a7ff012 100644 --- a/setup/joystick.c +++ b/setup/joystick.c @@ -26,6 +26,13 @@ #include "joystick.h" +typedef enum +{ + CALIBRATE_CENTER, + CALIBRATE_LEFT, + CALIBRATE_UP, +} calibration_stage_t; + // Joystick enable/disable int usejoystick = 0; @@ -55,6 +62,159 @@ int joystick_y_invert = 0; static txt_button_t *joystick_button; +// +// Calibration +// + +static txt_window_t *calibration_window; +static txt_label_t *calibration_label; +static calibration_stage_t calibrate_stage; +static SDL_Joystick **all_joysticks = NULL; + +// Try to open all joysticks visible to SDL. + +static int OpenAllJoysticks(void) +{ + int i; + int num_joysticks; + int result; + + // SDL_JoystickOpen() all joysticks. + + num_joysticks = SDL_NumJoysticks(); + + all_joysticks = malloc(sizeof(SDL_Joystick *) * num_joysticks); + + result = 0; + + for (i=0; i<num_joysticks; ++i) + { + all_joysticks[i] = SDL_JoystickOpen(i); + + // If any joystick is successfully opened, return true. + + if (all_joysticks[i] != NULL) + { + result = 1; + } + } + + if (!result) + { + free(all_joysticks); + all_joysticks = NULL; + } + + return result; +} + +// Close all the joysticks opened with OpenAllJoysticks() + +static void CloseAllJoysticks(void) +{ + int i; + int num_joysticks; + + num_joysticks = SDL_NumJoysticks(); + + for (i=0; i<num_joysticks; ++i) + { + if (all_joysticks[i] != NULL) + { + SDL_JoystickClose(all_joysticks[i]); + } + } + + free(all_joysticks); + all_joysticks = NULL; +} + +static void SetCalibrationLabel(void) +{ + char *message = "???"; + + switch (calibrate_stage) + { + case CALIBRATE_CENTER: + message = "Move the joystick to the\n" + "center, and press fire."; + break; + case CALIBRATE_UP: + message = "Move the joystick up,\n" + "and press fire."; + break; + case CALIBRATE_LEFT: + message = "Move the joystick to the\n" + "left, and press fire."; + break; + } + + TXT_SetLabel(calibration_label, message); +} + +static int CalibrationEventCallback(SDL_Event *event, void *user_data) +{ + return 0; +} + +static void NoJoystick(void) +{ + txt_window_t *window; + + window = TXT_NewWindow(NULL); + + TXT_AddWidget(window, + TXT_NewLabel("No joysticks could be opened.\n\n" + "Try configuring your joystick from within\n" + "your OS first.")); + + TXT_SetWindowAction(window, TXT_HORIZ_LEFT, NULL); + TXT_SetWindowAction(window, TXT_HORIZ_CENTER, + TXT_NewWindowEscapeAction(window)); + TXT_SetWindowAction(window, TXT_HORIZ_RIGHT, NULL); +} + +static void CalibrateWindowClosed(TXT_UNCAST_ARG(widget), TXT_UNCAST_ARG(unused)) +{ + CloseAllJoysticks(); + TXT_SDL_SetEventCallback(NULL, NULL); +} + +static void CalibrateJoystick(TXT_UNCAST_ARG(widget), TXT_UNCAST_ARG(unused)) +{ + calibrate_stage = CALIBRATE_CENTER; + + // Try to open all available joysticks. If none are opened successfully, + // bomb out with an error. + + if (!OpenAllJoysticks()) + { + NoJoystick(); + return; + } + + calibration_window = TXT_NewWindow("Joystick calibration"); + + TXT_AddWidgets(calibration_window, + TXT_NewLabel("Please follow the following instructions\n" + "in order to calibrate your joystick."), + TXT_NewStrut(0, 1), + calibration_label = TXT_NewLabel("zzz"), + TXT_NewStrut(0, 1), + NULL); + + TXT_SetWidgetAlign(calibration_label, TXT_HORIZ_CENTER); + SetCalibrationLabel(); + TXT_SDL_SetEventCallback(CalibrationEventCallback, NULL); + + TXT_SignalConnect(calibration_window, "closed", CalibrateWindowClosed, NULL); +} + + +// +// GUI +// + static void SetJoystickButtonLabel(void) { char *name; @@ -116,6 +276,8 @@ void ConfigJoystick(void) NULL); } + TXT_SignalConnect(joystick_button, "pressed", CalibrateJoystick, NULL); + SetJoystickButtonLabel(); } |