usbloadergx/source/GUI/gui_trigger.cpp

/****************************************************************************
 * libwiigui
 *
 * Tantric 2009
 *
 * gui_trigger.cpp
 *
 * GUI class definitions
 ***************************************************************************/

#include "gui.h"

static int scrollDelay = 0;

/**
 * Constructor for the GuiTrigger class.
 */
GuiTrigger::GuiTrigger()
{
	chan = -1;
	memset(&wpad, 0, sizeof(WPADData));
	memset(&pad, 0, sizeof(PADData));
}

/**
 * Destructor for the GuiTrigger class.
 */
GuiTrigger::~GuiTrigger()
{
}

/**
 * Sets a simple trigger. Requires:
 * - Element is selected
 * - Trigger button is pressed
 */
void GuiTrigger::SetSimpleTrigger(s32 ch, u32 wiibtns, u16 gcbtns)
{
	type = TRIGGER_SIMPLE;
	chan = ch;
	wpad.btns_d = wiibtns;
	pad.btns_d = gcbtns;
}

/**
 * Sets a held trigger. Requires:
 * - Element is selected
 * - Trigger button is pressed and held
 */
void GuiTrigger::SetHeldTrigger(s32 ch, u32 wiibtns, u16 gcbtns)
{
	type = TRIGGER_HELD;
	chan = ch;
	wpad.btns_h = wiibtns;
	pad.btns_h = gcbtns;
}

/**
 * Sets a button trigger. Requires:
 * - Trigger button is pressed
 */
void GuiTrigger::SetButtonOnlyTrigger(s32 ch, u32 wiibtns, u16 gcbtns)
{
	type = TRIGGER_BUTTON_ONLY;
	chan = ch;
	wpad.btns_d = wiibtns;
	pad.btns_d = gcbtns;
}

/****************************************************************************
 * WPAD_Stick
 *
 * Get X/Y value from Wii Joystick (classic, nunchuk) input
 ***************************************************************************/

s8 GuiTrigger::WPAD_Stick(u8 right, int axis)
{
	float mag = 0.0;
	float ang = 0.0;

	switch ( wpad.exp.type )
	{
		case WPAD_EXP_NUNCHUK:
		case WPAD_EXP_GUITARHERO3:
		{
			if ( right == 0 )
			{
				mag = wpad.exp.nunchuk.js.mag;
				ang = wpad.exp.nunchuk.js.ang;
			}
			break;
		}
		case WPAD_EXP_CLASSIC:
		{
			if ( right == 0 )
			{
				mag = wpad.exp.classic.ljs.mag;
				ang = wpad.exp.classic.ljs.ang;
			}
			else
			{
				mag = wpad.exp.classic.rjs.mag;
				ang = wpad.exp.classic.rjs.ang;
			}
			break;
		}
		default:
			break;
	}

	/* calculate x/y value (angle need to be converted into radian) */
	if ( mag > 1.0 )
		mag = 1.0;
	else if ( mag < -1.0 )
		mag = -1.0;

	float val;

	if ( axis == 0 ) // x-axis
		val = (float) (mag * sin( (PI * ang) / 180.0f ));
	else // y-axis
		val = (float) (mag * cos( (PI * ang) / 180.0f ));

	return ( s8 )( val * 128.0f );
}

bool GuiTrigger::Left()
{
	u32 wiibtn = WPAD_BUTTON_LEFT;
	if(wpad.exp.type == WPAD_EXP_CLASSIC)
		wiibtn = WPAD_CLASSIC_BUTTON_LEFT;

	if (   ((wpad.btns_d | wpad.btns_h) & wiibtn)
		|| ((pad.btns_d | pad.btns_h) & PAD_BUTTON_LEFT)
		|| (wpad.exp.type == WPAD_EXP_NUNCHUK &&  WPAD_Stick(0, 0) < -PADCAL))
	{
		if ((wpad.btns_d & wiibtn) || (pad.btns_d & PAD_BUTTON_LEFT))
		{
			scrollDelay = SCROLL_INITIAL_DELAY; // reset scroll delay.
			return true;
		}
		else if (--scrollDelay <= 0)
		{
			scrollDelay = SCROLL_LOOP_DELAY;
			return true;
		}
	}
	return false;
}

bool GuiTrigger::Right()
{
	u32 wiibtn = WPAD_BUTTON_RIGHT;
	if(wpad.exp.type == WPAD_EXP_CLASSIC)
		wiibtn = WPAD_CLASSIC_BUTTON_RIGHT;

	if (   ((wpad.btns_d | wpad.btns_h) & wiibtn)
		|| ((pad.btns_d | pad.btns_h) & PAD_BUTTON_RIGHT)
		|| (wpad.exp.type == WPAD_EXP_NUNCHUK &&  WPAD_Stick(0, 0) > PADCAL))
	{
		if ((wpad.btns_d & wiibtn) || (pad.btns_d & PAD_BUTTON_RIGHT))
		{
			scrollDelay = SCROLL_INITIAL_DELAY; // reset scroll delay.
			return true;
		}
		else if (--scrollDelay <= 0)
		{
			scrollDelay = SCROLL_LOOP_DELAY;
			return true;
		}
	}
	return false;
}

bool GuiTrigger::Up()
{
	u32 wiibtn = WPAD_BUTTON_UP;
	if(wpad.exp.type == WPAD_EXP_CLASSIC)
		wiibtn = WPAD_CLASSIC_BUTTON_UP;

	if (   ((wpad.btns_d | wpad.btns_h) & wiibtn)
		|| ((pad.btns_d | pad.btns_h) & PAD_BUTTON_UP)
		|| (wpad.exp.type == WPAD_EXP_NUNCHUK &&  WPAD_Stick(0, 1) > PADCAL))
	{
		if ((wpad.btns_d & wiibtn) || (pad.btns_d & PAD_BUTTON_UP))
		{
			scrollDelay = SCROLL_INITIAL_DELAY; // reset scroll delay.
			return true;
		}
		else if (--scrollDelay <= 0)
		{
			scrollDelay = SCROLL_LOOP_DELAY;
			return true;
		}
	}
	return false;
}

bool GuiTrigger::Down()
{
	u32 wiibtn = WPAD_BUTTON_DOWN;
	if(wpad.exp.type == WPAD_EXP_CLASSIC)
		wiibtn = WPAD_CLASSIC_BUTTON_DOWN;

	if (   ((wpad.btns_d | wpad.btns_h) & wiibtn)
		|| ((pad.btns_d | pad.btns_h) & PAD_BUTTON_DOWN)
		|| (wpad.exp.type == WPAD_EXP_NUNCHUK &&  WPAD_Stick(0, 1) < -PADCAL))
	{
		if ((wpad.btns_d & wiibtn) || (pad.btns_d & PAD_BUTTON_DOWN))
		{
			scrollDelay = SCROLL_INITIAL_DELAY; // reset scroll delay.
			return true;
		}
		else if (--scrollDelay <= 0)
		{
			scrollDelay = SCROLL_LOOP_DELAY;
			return true;
		}
	}
	return false;
}