ref: 57ad83802bd66f6f3346cdeddd6e7e474b793511
parent: b5ca5da5f73f49a382e5db3e3f5449676ca999db
author: Simon Howard <fraggle@gmail.com>
date: Sat Jun 9 13:51:16 EDT 2007
Initial joystick calibration code. Subversion-branch: /trunk/chocolate-doom Subversion-revision: 898
--- 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 @@
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;
@@ -115,6 +275,8 @@
TXT_NewJoystickInput(&joybspeed),
NULL);
}
+
+ TXT_SignalConnect(joystick_button, "pressed", CalibrateJoystick, NULL);
SetJoystickButtonLabel();
}