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//
// Copyright(C) 2005-2014 Simon Howard
//
// 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.
//
#ifndef TXT_JOY_AXIS_H
#define TXT_JOY_AXIS_H
typedef struct txt_joystick_axis_s txt_joystick_axis_t;
typedef enum
{
JOYSTICK_AXIS_HORIZONTAL,
JOYSTICK_AXIS_VERTICAL,
} txt_joystick_axis_direction_t;
typedef enum
{
CONFIG_CENTER, // "Center the joystick and press a button..."
CONFIG_STAGE1, // "Top or left and press a button..."
CONFIG_STAGE2, // [Optional] "Bottom or right and press a button..."
} txt_joystick_axis_stage_t;
// Callback invoked when calibration is completed.
typedef void (*txt_joystick_axis_callback_t)(void);
#include "txt_widget.h"
#include "txt_window.h"
#include "SDL.h"
//
// A joystick axis.
//
struct txt_joystick_axis_s
{
txt_widget_t widget;
int *axis, *invert;
txt_joystick_axis_direction_t dir;
// Only used when configuring:
// Configuration prompt window and label.
txt_window_t *config_window;
txt_label_t *config_label;
// SDL joystick handle for reading joystick state.
SDL_Joystick *joystick;
// "Bad" joystick axes. Sometimes an axis can be stuck or "bad". An
// example I found is that if you unplug the nunchuck extension from
// a Wii remote, the axes from the nunchuck can be stuck at one of
// the maximum values. These have to be ignored, so when we ask the
// user to center the joystick, we look for bad axes that are not
// close to zero.
boolean *bad_axis;
// Stage we have reached in configuring joystick axis.
txt_joystick_axis_stage_t config_stage;
// Button to press to advance to next stage.
int config_button;
// Callback invoked when the axis is calibrated.
txt_joystick_axis_callback_t callback;
};
txt_joystick_axis_t *TXT_NewJoystickAxis(int *axis, int *invert,
txt_joystick_axis_direction_t dir);
// Configure a joystick axis widget.
// axis: The axis widget to configure.
// using_button: If non-negative, use this joystick button as the button
// to expect from the user. Otherwise, ask.
void TXT_ConfigureJoystickAxis(txt_joystick_axis_t *axis, int using_button,
txt_joystick_axis_callback_t callback);
#endif /* #ifndef TXT_JOY_AXIS_H */
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