/* VowelEditor.c
 *
 * Copyright (C) 2008 David Weenink
 *
 * 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.
 */

/*
 djmw 20080202, 20080330
*/

/*
trajectory --> path ????
 The main part of the VowelEditor is a drawing area. 
 In this drawing area a cursor can be moved around by a mouse.
 The position of the cursor is related to the F1 and F2 frequencies.
 On_mouse_down the position of the cursor is sampled (Not a fixed intervals!).
 This results in a series of (x,y) values that will be transformed to (F1,F2) values in Hertz 
 The corresponding sound wil be made audible until the mouse is released.
 
 Graphics area is F1-F2 plane. Origin top-right with log(F2) horizontal and log(F1) vertical). 
 Axis orientation from topright: F1 down, F2 to the left.
 F1, F2 are always evaluated to Hz;
 In the Graphics part, the Graphics_window (0, 1, 0, 1), i.e. origin is bottom-left.
 log(fmin) -> 1; log(fmax)-> 0
 Transformations XY <=> F1F2: VowelEditor_getXYFromF1F2(...) and VowelEditor_getF1F2FromXY(...)
  For x direction F2 from right to left
   1 = a * log(f2min) +b 
   0 = a * log(f2max) +b
   x' = a (log(f2)-log(f2max))
	
   1 = a * log(f1min) +b
   0 = a * log(f1max) +b
   y' = a (log(f1)-log(f1max))
 TO DO:
 The third and higher formant frequencies can also be set indirectly by defining them as functions on the f1,f2 plane
 (for example, by an object of type Matrix).
 Make sound-follows-mouse real time!
*/

#include "praat.h"
#include "PitchTier_to_Sound.h"
#include "Polygon.h"
#include "TableOfReal_extensions.h"
#include "Table_extensions.h"
#include "VowelEditor.h"
#include "machine.h"
#include "Preferences.h"
#include "EditorM.h"
#include <time.h>

#if defined (macintosh)
	#include <sys/time.h>
#elif defined (linux)
	#include <sys/time.h>
	#include <signal.h>
#endif

// Male, Female, Child speaker
#define VG_SPEAKER_M 0
#define VG_SPEAKER_F 1
#define VG_SPEAKER_C 2

// STATUS_INFO >=Gui_LABEL_HEIGHT !!
#define STATUS_INFO (1.5*Gui_LABEL_HEIGHT)
#define MARGIN_RIGHT 10
#define MARGIN_LEFT 50
#define MARGIN_TOP 50
#define MARGIN_BOTTOM (60+STATUS_INFO)
#define BUFFER_SIZE_SEC 4
#define SAMPLING_FREQUENCY 44100

#define STATUSINFO_STARTINTR0 L"Start (F1,F2,F0) = ("
#define STATUSINFO_ENDINTR0 L"End (F1,F2,F0) = ("
#define STATUSINFO_ENDING L")"
#define MICROSECPRECISION(x) (round((x)*1000000)/1000000)

// Too prevent the generation of inaudible short Sounds we set a minimum duration
#define MINIMUM_SOUND_DURATION 0.01

// menu callbacks
static int menu_cb_help (EDITOR_ARGS);
static int menu_cb_prefs (EDITOR_ARGS);
static int menu_cb_publishSound (EDITOR_ARGS);
static int menu_cb_extract_FormantTier (EDITOR_ARGS);
static int menu_cb_extract_PitchTier (EDITOR_ARGS);
static int menu_cb_showOneVowelMark (EDITOR_ARGS);
static int menu_cb_showVowelMarks (EDITOR_ARGS);
static int menu_cb_setF0 (EDITOR_ARGS);
static int menu_cb_setF3F4 (EDITOR_ARGS);
static int menu_cb_reverseTrajectory (EDITOR_ARGS);
static int menu_cb_newTrajectory (EDITOR_ARGS);
static int menu_cb_extendTrajectory (EDITOR_ARGS);
static int menu_cb_modifyTrajectoryDuration (EDITOR_ARGS);
static int menu_cb_shiftTrajectory (EDITOR_ARGS);
static int menu_cb_showTrajectoryTimeMarkersEvery (EDITOR_ARGS);
// button callbacks
static void gui_button_cb_publish (I, GuiButtonEvent event);
static void gui_button_cb_play (I, GuiButtonEvent event);
static void gui_drawingarea_cb_resize (I, GuiDrawingAreaResizeEvent event);
static void gui_drawingarea_cb_click (I, GuiDrawingAreaClickEvent event);
static void gui_button_cb_reverse (I, GuiButtonEvent event);
static void gui_drawingarea_cb_expose (I, GuiDrawingAreaExposeEvent event);
// helpers
static double getRealFromTextWidget (Widget me);
static double getCoordinate (double fmin, double fmax, double f);
static double getF0 (struct structF0 *f0p, double time);
static void checkF1F2 (VowelEditor me, double *f1, double *f2);
static void checkF0 (struct structF0 *f0p, double *f0);
static void	checkXY (double *x, double *y);
static void Sound_fadeIn (Sound me, double duration, int fromFirstNonZeroSample);
static void Sound_fadeOut (Sound me, double duration);
static void PitchTier_newDuration (PitchTier me, struct structF0 *f0p, double newDuration);
static void FormantTier_newDuration (FormantTier me, double newDuration);
static void FormantTier_drawF1F2Trajectory (FormantTier me, Graphics g, double f1min, double f1max, double f2min, double f2max, double markTraceEvery, double width);
static void Vowel_newDuration (Vowel me, struct structF0 *f0p, double newDuration);
static PitchTier VowelEditor_to_PitchTier (VowelEditor me, double duration);
static void VowelEditor_updateF0Info (VowelEditor me);
static void VowelEditor_updateExtendDuration (VowelEditor me);
static double VowelEditor_updateDurationInfo (VowelEditor me);
static int VowelEditor_Vowel_updateTiers (VowelEditor me, Vowel thee, double time, double x, double y);
static int VowelEditor_Vowel_addData (VowelEditor me, Vowel thee, double time, double f1, double f2, double f0);
static void VowelEditor_getXYFromF1F2 (VowelEditor me, double f1, double f2, double *x, double *y);
static void VowelEditor_getF1F2FromXY (VowelEditor me, double x, double y, double *f1, double *f2);
static void VowelEditor_updateVowel (VowelEditor me);
static Sound VowelEditor_createTarget (VowelEditor me);
static void VowelEditor_Vowel_reverseFormantTier (VowelEditor me);
static void VowelEditor_shiftF1F2 (VowelEditor me, double f1_st, double f2_st);
static int VowelEditor_setSource (VowelEditor me);
static int VowelEditor_setMarks (VowelEditor me, int dataset, int speakerType);
static int VowelEditor_setF3F4 (VowelEditor me, double f3, double b3, double f4, double b4);
static void VowelEditor_getF3F4 (VowelEditor me, double f1, double f2, double *f3, double *b3, 
	double *f4, double *b4);
static double Matrix_getValue (Matrix me, double x, double y);
static void VowelEditor_drawBackground (VowelEditor me, Graphics g);
// forward declarations end

static void VowelEditor_getXYFromF1F2 (VowelEditor me, double f1, double f2, double *x, double *y)
{
	*x = log (f2 / my f2max) / log (my f2min / my f2max);
	*y = log (f1 / my f1max) / log (my f1min / my f1max); 
}

//Graphics_DCtoWC ????
static void VowelEditor_getF1F2FromXY (VowelEditor me, double x, double y, double *f1, double *f2)
{
	*f2 = my f2min * pow (my f2max / my f2min, 1 - x);
	*f1 = my f1min * pow (my f1max / my f1min, 1 - y);
}

#define REPRESENTNUMBER(x,i) (((x) == NUMundefined) ? L" undef" : ((swprintf(buffer[i], 7, L"%6.1f",x)), buffer[i]))
static void appendF1F2F0 (MelderString *statusInfo, wchar_t *intro, double f1, double f2, double f0, wchar_t *ending)
{
	wchar_t *komma = L", ";
	wchar_t buffer[4][10];
	MelderString_append7 (statusInfo, intro, REPRESENTNUMBER(f1,1), komma, REPRESENTNUMBER(f2,2), komma, REPRESENTNUMBER(f0,3), ending);
}

static double getRealFromTextWidget (Widget me)
{
	double value = NUMundefined;
	wchar_t *dirty = GuiText_getString (me);
	if (! Interpreter_numericExpression (NULL, dirty, & value)) value = NUMundefined;
	Melder_free (dirty);
	return value;
}

static void VowelEditor_updateF0Info (VowelEditor me)
{
	double f0 = getRealFromTextWidget (my f0TextField);
	checkF0 (&my f0, &f0);
	GuiText_setString (my f0TextField, Melder_double (f0));
	my f0.start = f0;
	my f0.slopeOctPerSec = getRealFromTextWidget (my f0SlopeTextField);
	GuiText_setString (my f0SlopeTextField, Melder_double (my f0.slopeOctPerSec));
}

static void VowelEditor_updateExtendDuration (VowelEditor me)
{
	double extend = getRealFromTextWidget (my extendTextField);
	if (extend <= MINIMUM_SOUND_DURATION || extend > my maximumDuration) extend = MINIMUM_SOUND_DURATION;
	GuiText_setString (my extendTextField, Melder_double (extend));
	my extendDuration = extend;
}

static double VowelEditor_updateDurationInfo (VowelEditor me)
{
	double duration = getRealFromTextWidget (my durationTextField);
	if (duration < MINIMUM_SOUND_DURATION) duration = MINIMUM_SOUND_DURATION;
	GuiText_setString (my durationTextField, Melder_double (MICROSECPRECISION(duration)));
	return duration;
}

static void Sound_fadeIn (Sound me, double duration, int fromFirstNonZeroSample)
{
	long istart = 1, numberOfSamples = duration / my dx;
	
	if (numberOfSamples < 2) return;
	if (fromFirstNonZeroSample != 0)
	{
		// If the first part of the sound is very low level we put sample values to zero and 
		// start windowing from the position where the amplitude is above the minimum level.
		// WARNING: this part is special for the artificial vowels because
		// 1. They have no offset
		// 2. They are already scaled to a maximum amplitude of 0.99
		// 3. For 16 bit precision
		double zmin = 0.5 / pow(2, 16);
		while (fabs (my z[1][istart]) < zmin && istart < my nx)
		{
			my z[1][istart] = 0; // To make sure 
			istart++;
		}
	}
	if (numberOfSamples > my nx - istart + 1) numberOfSamples = my nx - istart + 1;
	
	for (long i = 1; i <= numberOfSamples; i++)
	{
		double phase = NUMpi * (i - 1) / (numberOfSamples - 1);
			
		my z[1][istart + i -1] *= 0.5 * (1 - cos (phase));	
	}
}

static void Sound_fadeOut (Sound me, double duration)
{
	long istart, numberOfSamples = duration / my dx;
	
	if (numberOfSamples < 2) return;
	if (numberOfSamples > my nx) numberOfSamples = my nx;
	istart = my nx - numberOfSamples;
	// only one channel
	for (long i = 1; i <= numberOfSamples; i++)
	{
		double phase = NUMpi * (i - 1)/ (numberOfSamples - 1);
			
		my z[1][istart + i] *= 0.5 * (1 + cos (phase));	
	}
}

static double getF0 (struct structF0 *f0p, double time)
{
	double f0 = f0p -> start * pow (2, f0p -> slopeOctPerSec * time);
	if (f0 < f0p -> minimum) { f0 = f0p -> minimum; } else if (f0 > f0p -> maximum) { f0 = f0p -> maximum; }
	return f0;
}

static void VowelEditor_Vowel_reverseFormantTier (VowelEditor me)
{
	FormantTier ft = my vowel -> ft;
	FormantPoint fpt;
	double duration = ft -> xmax;
	long np = ft -> points -> size, np_2 = np / 2;
	
	for (long i = 1; i <= np_2; i++)
	{
		fpt = ft -> points -> item[i];
		ft -> points -> item[i] =  ft -> points -> item[np - i + 1];
		ft -> points -> item[np - i + 1] = fpt;
		fpt = ft -> points -> item[i];
		fpt -> time = duration - fpt -> time;  
		fpt = ft -> points -> item[np - i + 1];
		fpt -> time = duration - fpt -> time;
	}
	if (np % 2 == 1)
	{
		fpt = ft -> points -> item[np_2+1];
		fpt -> time = duration - fpt -> time;
	}
}

static void VowelEditor_shiftF1F2 (VowelEditor me, double f1_st, double f2_st)
{
	FormantTier ft = my vowel -> ft;
	for (long i = 1; i <= ft -> points -> size; i++)
	{
		FormantPoint fp = ft -> points -> item[i];
		double f1 = fp -> formant[0], f2 = fp -> formant[1];
		double f3, b3, f4, b4;
		
		f1 *= pow (2, f1_st / 12);
		if (f1 < my f1min) f1 = my f1min;
		if (f1 > my f1max) f1 = my f1max;
		fp -> formant[0] = f1;
		fp -> bandwidth[0] = f1 / 10;
		
		f2 *= pow (2, f2_st / 12);
		if (f2 < my f2min) f2 = my f2min;
		if (f2 > my f2max) f2 = my f2max;
		fp -> formant[1] = f2;
		fp -> bandwidth[1] = f2 / 10;
		VowelEditor_getF3F4 (me, f1, f2, &f3, &b3, &f4, &b4);
		fp -> formant[2] = f3;
		fp -> bandwidth[2] = b3;
		fp -> formant[3] = f4;
		fp -> bandwidth[3] = b4;
	}
}

static void Vowel_newDuration (Vowel me, struct structF0 *f0p, double newDuration)
{
	if (newDuration != my xmax)
	{
		double multiplier = newDuration / my xmax;
		FormantTier_newDuration (my ft, newDuration);
		my xmax *= multiplier;
	}
	PitchTier_newDuration (my pt, f0p, newDuration); // always update
	
}

static void FormantTier_newDuration (FormantTier me, double newDuration)
{
	if (newDuration != my xmax)
	{
		double multiplier = newDuration / my xmax;
		
		for (long i = 1; i <= my points -> size; i++)
		{
			FormantPoint fp = my points -> item[i];
			fp -> time *= multiplier;
		}
		my xmax *= multiplier;
	}
}

static void PitchTier_newDuration (PitchTier me, struct structF0 *f0p, double newDuration)
{
	// Always update; Widget text might have changed
	double multiplier = newDuration / my xmax;
	for (long i = 1; i <= my points -> size; i++)
	{
		RealPoint pp = my points -> item[i];
		pp -> time *= multiplier;
		pp -> value = getF0 (f0p, pp -> time);
	}
	my xmax *= multiplier;
}

static void VowelEditor_updateVowel (VowelEditor me)
{
	double newDuration = VowelEditor_updateDurationInfo (me); // Get new duration from TextWidget
	VowelEditor_updateF0Info (me); // Get new pitch and slope values from TextWidgets
	Vowel_newDuration (my vowel, & my f0, newDuration); 
}

static double getCoordinate (double fmin, double fmax, double f)
{
	return log (f / fmax) / log (fmin / fmax);
}

#define GETX(x) (getCoordinate (f2min, f2max, x))
#define GETY(y) (getCoordinate (f1min, f1max, y))
// Our FormantTiers always have a FormantPoint at t=xmin and t=xmax;
static void FormantTier_drawF1F2Trajectory (FormantTier me, Graphics g, double f1min, double f1max, double f2min, double f2max, double markTraceEvery, double width)
{
	int it, imark = 1, glt = Graphics_inqLineType (g);
	double glw = Graphics_inqLineWidth (g), x1, y1, x2, y2, t1, t2;
	int colour = Graphics_inqColour (g);
	long nfp = my points -> size;
	FormantPoint fp = my points -> item[1], fpn = my points -> item[nfp];

	Graphics_setInner (g);
	Graphics_setWindow (g, 0, 1, 0, 1);
	Graphics_setLineType (g, Graphics_DRAWN);
	// Too short too hear ?
	if ((my xmax - my xmin) < 0.005) Graphics_setColour (g, Graphics_RED);
	x1 = GETX(fp->formant[1]); y1 = GETY(fp->formant[0]); t1 = fp->time;
	for (it = 2; it <= nfp; it++)
	{
		double tm, markLength = 0.01;
		fp = my points -> item[it];
		x2 = GETX(fp->formant[1]); y2 = GETY(fp->formant[0]); t2 = fp->time;
		Graphics_setLineWidth (g, 3);
		Graphics_line (g, x1, y1, x2, y2);
		while (markTraceEvery > 0 && (tm = imark * markTraceEvery) < t2)
		{
			// line orthogonal to y = (y1/x1)*x is y = -(x1/y1)*x
			double fraction = (tm - t1) / (t2 - t1);
			double dx = x2 - x1, dy = y2 - y1;
			double xm = x1 + fraction * dx, ym = y1 + fraction * dy;
			double xl1 = dy * markLength / sqrt (dx * dx + dy * dy), xl2 = - xl1;
			double yl1 = dx * markLength / sqrt (dx * dx + dy * dy), yl2 = - yl1;
		
			if (dx * dy > 0)
			{
				xl1 = -fabs (xl1); yl1 = fabs(yl1);
				xl2 = fabs (xl1); yl2 = -fabs(yl1);
			}
			else if (dx * dy < 0)
			{
				xl1 = -fabs (xl1); yl1 = -fabs(yl1);
				xl2 = fabs (xl1); yl2 = fabs(yl1);
			}
			Graphics_setLineWidth (g, 1);
			Graphics_line (g, xm + xl1, ym + yl1, xm + xl2, ym + yl2);
		
			imark++;
		}
		x1 = x2; y1 = y2; t1 = t2;
	}
	// Arrow at end
	{
		double gas = Graphics_inqArrowSize (g), arrowSize = 1;
		double size = 10.0 * arrowSize * Graphics_getResolution (g) / 75.0 / width, size2 = size * size;
		Graphics_setArrowSize (g, arrowSize);
		it = 1;
		while (it <= (nfp -1))
		{
			fp = my points -> item[nfp - it];
			double dx = GETX(fpn->formant[1]) - GETX(fp->formant[1]);
			double dy = GETY(fpn->formant[0]) - GETY(fp->formant[0]);
			double d2 = dx * dx + dy * dy;
			if (d2 > size2) break;
			it++;
		}
		Graphics_arrow (g, GETX(fp->formant[1]), GETY(fp->formant[0]), GETX(fpn->formant[1]), GETY(fpn->formant[0]));
		Graphics_setArrowSize (g, gas);
	}
	Graphics_unsetInner (g);
	Graphics_setColour (g, colour);
	Graphics_setLineType (g, glt);
	Graphics_setLineWidth (g, glw);
}
#undef GETX
#undef GETY

static PitchTier VowelEditor_to_PitchTier (VowelEditor me, double duration)
{
	double t_end = duration;
	double f0_end = my f0.start * pow (2, my f0.slopeOctPerSec * t_end);
	PitchTier thee = PitchTier_create (0, t_end);
	
	if (thee == NULL) return NULL;
	if (! RealTier_addPoint (thee, 0, my f0.start)) goto end;
	if (my f0.slopeOctPerSec < 0)
	{
		if (f0_end < my f0.minimum)
		{
			t_end = log2 (my f0.minimum / my f0.start) / my f0.slopeOctPerSec;
			f0_end = my f0.minimum;
		}
	}
	else if (my f0.slopeOctPerSec > 0)
	{
		if (f0_end > my f0.maximum)
		{
			t_end = log2 (my f0.maximum / my f0.start) / my f0.slopeOctPerSec;
			f0_end = my f0.maximum;
		}
	}
	RealTier_addPoint (thee, t_end, f0_end);
end:
	if (Melder_hasError ()) forget (thee);
	return thee;
}

static struct {
	int soundFollowsMouse;
	double f1min, f1max, f2min, f2max;
	double f3, b3, f4, b4;
	int frequencyScale;
	int axisOrientation;
	int speakerType;
} prefs;

static struct structF0 f0default = { 140.0, 0.0, 40.0, 2000.0, SAMPLING_FREQUENCY, 1, 0.0, 2000 };
static struct structF1F2Grid griddefault = { 200, 500, 0, 1, 0, 1, 0.5 };
 
void VowelEditor_prefs (void)
{
	Preferences_addInt (L"VowelEditor.soundFollowsMouse", &prefs.soundFollowsMouse, 1);
	Preferences_addDouble (L"VowelEditor.f1min", &prefs.f1min, 200);
	Preferences_addDouble (L"VowelEditor.f1max", &prefs.f1max, 1200);
	Preferences_addDouble (L"VowelEditor.f2min", &prefs.f2min, 500);
	Preferences_addDouble (L"VowelEditor.f2max", &prefs.f2max, 3500);
	Preferences_addDouble (L"VowelEditor.f3", &prefs.f3, 2500);
	Preferences_addDouble (L"VowelEditor.b3", &prefs.b3, 250);
	Preferences_addDouble (L"VowelEditor.f4", &prefs.f4, 3500);
	Preferences_addDouble (L"VowelEditor.b4", &prefs.b4, 350);
	Preferences_addInt (L"VowelEditor.frequencyScale", &prefs.frequencyScale, 0);
	Preferences_addInt (L"VowelEditor.axisOrientation", &prefs.axisOrientation, 0);
	Preferences_addInt (L"VowelEditor.speakerType", &prefs.speakerType, 1);
}

static int VowelEditor_setMarks (VowelEditor me, int dataset, int speakerType)
{
	Table thee = NULL, te = NULL;
	wchar_t *Type[4] = { L"", L"m", L"w", L"c" };
	wchar_t *Sex[3] = { L"", L"m", L"f"};
	
	if (dataset == 1) // American-English
	{
		thee = Table_createFromPetersonBarneyData ();
		if (thee == NULL) return 0;
		te = Table_extractRowsWhereColumn_string (thee, 1, kMelder_string_EQUAL_TO, Type[speakerType]);
	}
	else if (dataset == 2) // Dutch
	{
		if (speakerType == 1 || speakerType == 2) // male + female from Pols van Nierop
		{
			thee = Table_createFromPolsVanNieropData ();
			if (thee == NULL) return 0;
			te = Table_extractRowsWhereColumn_string (thee, 1, kMelder_string_EQUAL_TO, Sex[speakerType]);
		}
		else
		{
			thee = Table_createFromWeeninkData ();
			if (thee == NULL) return 0;
			te = Table_extractRowsWhereColumn_string (thee, 1, kMelder_string_EQUAL_TO, Type[speakerType]);
		}
	}
	else
	{
		forget (my marks);
		return 1;
	}
	forget (thee);
	if (te == NULL) return 0;
	thee = Table_collapseRows (te, L"IPA", L"", L"F1 F2", L"", L"", L"");
	if (thee == NULL) return 0;

	forget (my marks);
	my marks = thee;
	return 1;
}

static int VowelEditor_setF3F4 (VowelEditor me, double f3, double b3, double f4, double b4)
{
	double xmin = my f2min, xmax = my f2max, dx = my f2max - my f2min, x1 = dx / 2;
	double dy = my f1max - my f1min, y1 = dy / 2; 

	if (my f3 == NULL)
	{
		my f3 = Matrix_create (xmin, xmax, 1, dx, x1, my f1min, my f1max, 1, dy, y1);
		if (my f3 == NULL) goto end;
	}
	if (my b3 == NULL)
	{
		my b3 = Matrix_create (xmin, xmax, 1, dx, x1, my f1min, my f1max, 1, dy, y1);
		if (my b3 == NULL) goto end;
	}
	if (my f4 == NULL)
	{
		my f4 = Matrix_create (xmin, xmax, 1, dx, x1, my f1min, my f1max, 1, dy, y1);
		if (my f4 == NULL) goto end;
	}
	if (my b4 == NULL) my b4 = Matrix_create (xmin, xmax, 1, dx, x1, my f1min, my f1max, 1, dy, y1);
	
end:

	if (Melder_hasError ())
	{
		forget (my f3); forget (my b3);
		forget (my f4); forget (my b4);
		return 0;
	}
	my f3 -> z[1][1] = f3; my b3 -> z[1][1] = b3;
	my f4 -> z[1][1] = f4; my b4 -> z[1][1] = b4;
	return 1;
}

static double Matrix_getValue (Matrix me, double x, double y)
{
	(void) x;
	(void) y;
	return my z[1][1];
}

static void VowelEditor_getF3F4 (VowelEditor me, double f1, double f2, double *f3, double *b3, double *f4, double *b4)
{
	*f3 = Matrix_getValue (my f3, f2, f1);
	*b3 = Matrix_getValue (my b3, f2, f1);
	*f4 = Matrix_getValue (my f4, f2, f1);
	*b4 = Matrix_getValue (my b4, f2, f1);
}

static void VowelEditor_drawBackground (VowelEditor me, Graphics g)
{
	Table thee = my marks;
	double x1, y1, x2, y2, f1, f2;
	
	Graphics_setInner (g);
	Graphics_setWindow (g, 0, 1, 0, 1);
	Graphics_setGrey (g, 0);
	Graphics_setLineType (g, Graphics_DRAWN);
	Graphics_setLineWidth (g, 2);
	Graphics_rectangle (g, 0, 1, 0, 1);
	Graphics_setLineWidth (g, 1);
	Graphics_setGrey (g, 0.5);
	
	// draw the markers
	if (thee != NULL)
	{
		for (int i = 1; i <= thy rows -> size; i++)
		{
			const wchar_t *label = Table_getStringValue (thee, i, 1);
			f1 = Table_getNumericValue (thee, i, 2);
			f2 = Table_getNumericValue (thee, i, 3);
			if (f1 >= my f1min && f1 <= my f1max && f2 >= my f2min && f2 <= my f2max)
			{
				VowelEditor_getXYFromF1F2 (me, f1, f2, &x1, &y1);
				Graphics_text (g, x1, y1, label);
			}
		}
	}
	// Draw the line F1=F2
	// 
	VowelEditor_getXYFromF1F2 (me, my f2min, my f2min, &x1, &y1);
	if (y1 >= 0 && y1 <=1)
	{
		VowelEditor_getXYFromF1F2 (me, my f1max, my f1max, &x2, &y2);
		if (x2 >= 0 && x2 <= 1)
		{
			Polygon p = Polygon_create (4);
			p -> x[1] = x1; p -> x[2] = x2;
			p -> y[1] = y1; p -> y[2] = y2;
			p -> x[3] =  1; p -> x[4] = x1;
			p -> y[3] =  0; p -> y[4] = y1;
			Graphics_fillArea (g, p -> numberOfPoints, & p -> x[1], & p -> y[1]);
			// Polygon_paint does not work because of use of Graphics_setInner.
			forget (p);
			Graphics_line (g, x1, y1, x2, y2);
		}
	}
	// Draw the grid
	if (my grid.df1 < (my f1max - my f1min)) // Horizontal lines
	{
		long iline = (my f1min + my grid.df1) / my grid.df1;
		Graphics_setGrey (g, 0.5);
		Graphics_setLineType (g, Graphics_DOTTED);
		while ((f1 = iline * my grid.df1) < my f1max)
		{
			if (f1 > my f1min)
			{
				VowelEditor_getXYFromF1F2 (me, f1, my f2min, &x1, &y1);
				VowelEditor_getXYFromF1F2 (me, f1, my f2max, &x2, &y2);
				Graphics_line (g, x1, y1, x2, y2);
			}
			iline++; 
		}
		Graphics_setLineType (g, Graphics_DRAWN);
		Graphics_setGrey (g, 0); // black
	}	
	if (my grid.df2 < (my f2max - my f2min))
	{
		long iline = (my f2min + my grid.df2) / my grid.df2;
		Graphics_setGrey (g, 0.5);
		Graphics_setLineType (g, Graphics_DOTTED);
		while ((f2 = iline * my grid.df2) < my f2max) // vert line
		{
			if (f2 > my f2min)
			{
				VowelEditor_getXYFromF1F2 (me, my f1min, f2, &x1, &y1);
				VowelEditor_getXYFromF1F2 (me, my f1max, f2, &x2, &y2);
				Graphics_line (g, x1, y1, x2, y2);
			}
			iline++; 
		}
		Graphics_setLineType (g, Graphics_DRAWN);
		Graphics_setGrey (g, 0); // black
	}
	Graphics_unsetInner (g);
	Graphics_setGrey (g, 0); // black
	Graphics_markLeft (g, 0, 0, 1, 0, Melder_double (my f1max));
	Graphics_markLeft (g, 1, 0, 1, 0, Melder_double (my f1min));
	Graphics_markTop (g, 0, 0, 1, 0, Melder_double (my f2max));
	Graphics_markTop (g, 1, 0, 1, 0, Melder_double (my f2min));

}

typedef struct
{
	long some_check_value;
	long istart;
	float *z;
} *paVowelData;
/* This routine will be called by the PortAudio engine when audio is needed.
** It may called at interrupt level on some machines so don't do anything
** that could mess up the system like calling malloc() or free().
*/
 
static int paCallback (const void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer,
	const PaStreamCallbackTimeInfo* timeInfo, PaStreamCallbackFlags statusFlags, I)
{
	iam (paVowelData);
	float *out = (float*) outputBuffer;
	unsigned int i;
	(void) inputBuffer; /* Prevent unused variable warning. */
	(void) timeInfo;
	(void) statusFlags;

	for (i = 0; i < framesPerBuffer; i++)
	{
		*out++ = my z[my istart+i];  /* left */
		*out++ = my z[my istart+i];  /* right */
	}
	my istart += framesPerBuffer;
	return 0;
}

/********** MENU METHODS **********/

static int menu_cb_help (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	(void) me;
	Melder_help (L"VowelEditor");
	return 1;
}

static int menu_cb_prefs (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	EDITOR_FORM (L"Preferences", 0);
		POSITIVE (L"left F1 range (Hz)", L"200.0")
		POSITIVE (L"right F1 range (Hz)", L"1000.0")
		POSITIVE (L"left F2 range (Hz)", L"500.0")
		POSITIVE (L"right F2 range (Hz)", L"2500.0")
		BOOLEAN (L"Sound-follows-mouse", 1)
	EDITOR_OK
		SET_REAL (L"left F1 range", prefs.f1min)
		SET_REAL (L"right F1 range", prefs.f1max)
		SET_REAL (L"left F2 range", prefs.f2min)
		SET_REAL (L"right F2 range", prefs.f2max)
		SET_INTEGER (L"Sound-follows-mouse", prefs.soundFollowsMouse)
	EDITOR_DO
		my frequencyScale = prefs.frequencyScale;
		my axisOrientation = prefs.axisOrientation;
		my f1min = prefs.f1min = GET_REAL (L"left F1 range");
		my f1max = prefs.f1max = GET_REAL (L"right F1 range");
		my f2min = prefs.f2min = GET_REAL (L"left F2 range");
		my f2max = prefs.f2max = GET_REAL (L"right F2 range");
		my soundFollowsMouse = prefs.soundFollowsMouse = GET_INTEGER (L"Sound-follows-mouse");
		Graphics_updateWs (my g);
	EDITOR_END
}

static int menu_cb_publishSound (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	Sound publish = VowelEditor_createTarget (me);
	if (publish == NULL) return 0;
	if (my publishCallback)	my publishCallback (me, my publishClosure, publish);
	return 1;
}

static int menu_cb_extract_FormantTier (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	VowelEditor_updateVowel (me);
	FormantTier publish = Data_copy (my vowel -> ft);
	if (publish == NULL) return 0;
	if (my publishCallback)	my publishCallback (me, my publishClosure, publish);
	return 1;
}

static int menu_cb_extract_PitchTier (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	VowelEditor_updateVowel (me);
	PitchTier publish = Data_copy (my vowel -> pt);
	if (publish == NULL) return 0;	
	if (my publishCallback)	my publishCallback (me, my publishClosure, publish);
	return 1;
}

static int menu_cb_drawTrajectory (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	EDITOR_FORM (L"Draw trajectory", 0)
		our form_pictureWindow (me, cmd);
		BOOLEAN (L"Garnish", 1)
	EDITOR_OK
		our ok_pictureWindow (me, cmd);
	EDITOR_DO
		int garnish = GET_INTEGER (L"Garnish");
		our do_pictureWindow (me, cmd);
		Editor_openPraatPicture (me);
		if (garnish) VowelEditor_drawBackground (me, my pictureGraphics);
		FormantTier_drawF1F2Trajectory (my vowel -> ft, my pictureGraphics, my f1min, my f1max, my f2min, my f2max, my markTraceEvery, my width);
		Editor_closePraatPicture (me);
	EDITOR_END
}

static int menu_cb_showOneVowelMark (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	EDITOR_FORM (L"Show one vowel mark", 0);
		POSITIVE (L"F1 (Hz)", L"300.0")
		POSITIVE (L"F2 (Hz)", L"600.0")
		WORD (L"Mark", L"u")
	EDITOR_OK
	EDITOR_DO
		double f1 = GET_REAL (L"F1");
		double f2 = GET_REAL (L"F2");
		wchar_t *label = GET_STRING (L"Mark");
		if (f1 >= my f1min && f1 <= my f1max && f2 >= my f2min && f2 <= my f2max)
		{
			long irow = 1;
			if (my marks == NULL)
			{
				my marks = Table_createWithColumnNames (1, L"IPA F1 F2 Colour");
				if (my marks == NULL) return 0;
			}
			else
			{
				if (! Table_appendRow (my marks)) return 0;
			}
			irow = my marks -> rows -> size;
			Table_setStringValue (my marks, irow, 1, label);
			Table_setNumericValue (my marks, irow, 2, f1);
			Table_setNumericValue (my marks, irow, 3, f2);
			Graphics_updateWs (my g);
		}
	EDITOR_END
}

static int menu_cb_showVowelMarks (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	EDITOR_FORM (L"Show vowel marks", 0);
		OPTIONMENU (L"Data set:", 1)
		OPTION (L"American English")
		OPTION (L"Dutch")
		OPTION (L"None")
		OPTIONMENU (L"Speaker:", 1)
		OPTION (L"Man")
		OPTION (L"Woman")
		OPTION (L"Child")
	EDITOR_OK
	EDITOR_DO
		if (! VowelEditor_setMarks (me, GET_INTEGER (L"Data set"), GET_INTEGER (L"Speaker"))) return 0;
		Graphics_updateWs (my g);
	EDITOR_END
}

static int menu_cb_setF0 (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	EDITOR_FORM (L"Set F0", 0);
		POSITIVE (L"Start F0 (Hz)", L"150.0")
		REAL (L"Slope (oct/s)", L"0.0")
	EDITOR_OK
	EDITOR_DO
		double f0 = GET_REAL (L"Start F0");
		checkF0 (&my f0, &f0);
		my f0.start = f0;
		my f0.slopeOctPerSec = GET_REAL (L"Slope");
		if (! VowelEditor_setSource (me)) return 0;
		GuiText_setString (my f0TextField, Melder_double (my f0.start));
		GuiText_setString (my f0SlopeTextField, Melder_double (my f0.slopeOctPerSec));
	EDITOR_END
}

static int menu_cb_setF3F4 (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	EDITOR_FORM (L"Set F3 & F4", 0);
		POSITIVE (L"F3 (Hz)", L"2500.0")
		POSITIVE (L"B3 (Hz)", L"250.0")
		POSITIVE (L"F4 (Hz)", L"3500.0")
		POSITIVE (L"B4 (Hz)", L"350.0")
	EDITOR_OK
	EDITOR_DO
		double f3 = GET_REAL (L"F3"), b3 = GET_REAL (L"B3");
		double f4 = GET_REAL (L"F4"), b4 = GET_REAL (L"B4");
		if (f3 >= f4 ) return Melder_error1 (L"F4 must be larger than F3.");
		if (! VowelEditor_setF3F4 (me, f3, b3, f4, b4)) return 0;
	EDITOR_END
}
static int menu_cb_reverseTrajectory (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	VowelEditor_Vowel_reverseFormantTier (me);

	Graphics_updateWs (my g);
	return 1;
}

static int VowelEditor_Vowel_addData (VowelEditor me, Vowel thee, double time, double f1, double f2, double f0)
{
	FormantPoint fp = FormantPoint_create (time);
	double f3, b3, f4, b4;
	
	if (fp == NULL) return 0;
	fp -> formant[0] = f1;
	fp -> bandwidth[0] = f1 / 10;
	fp -> formant[1] = f2;
	fp -> bandwidth[1] = f2 / 10;
	VowelEditor_getF3F4 (me, f1, f2, &f3, &b3, &f4, &b4);
	fp -> formant[2] = f3;
	fp -> bandwidth[2] = b3;
	fp -> formant[3] = f4;
	fp -> bandwidth[3] = b4;
	fp -> numberOfFormants = 4;

	if (! Collection_addItem (thy ft -> points, fp) ||
		! RealTier_addPoint (thy pt, time, f0)) return 0;
	return 1;
}

static void checkF1F2 (VowelEditor me, double *f1, double *f2)
{
	if (*f1 < my f1min) *f1 = my f1min;
	if (*f1 > my f1max) *f1 = my f1max;
	if (*f2 < my f2min) *f2 = my f2min;
	if (*f2 > my f2max) *f1 = my f2max;
}

static void checkF0 (struct structF0 *f0p, double *f0)
{
	if (*f0 > f0p -> maximum) *f0 = f0p -> maximum;
	if (*f0 < f0p -> minimum) *f0 = f0p -> minimum;
}

static void	checkXY (double *x, double *y)
{
	if (*x < 0) *x = 0;
	else if (*x > 1) *x = 1;
	if (*y < 0) *y = 0;
	else if (*y > 1) *y = 1;
}

static int menu_cb_newTrajectory (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	EDITOR_FORM (L"New Trajectory", 0);
		POSITIVE (L"Start F1 (Hz)", L"700.0")
		POSITIVE (L"Start F2 (Hz)", L"1200.0")
		POSITIVE (L"End F1 (Hz)", L"350.0")
		POSITIVE (L"End F2 (Hz)", L"800.0")
		POSITIVE (L"Duration (s)", L"0.25")
	EDITOR_OK
	EDITOR_DO
		double f0, f1, f2, time, duration = GET_REAL (L"Duration");
		Vowel vowel = Vowel_create (duration);
		if (vowel == NULL) goto end;

		time = 0;
		f0 =  getF0 (&my f0, time);
		f1 = GET_REAL (L"Start F1");
		f2 = GET_REAL (L"Start F2");
		checkF1F2 (me, &f1, &f2);
		if (! VowelEditor_Vowel_addData (me, vowel, time, f1, f2, f0)) goto end;
		time = duration;
		f0 =  getF0 (&my f0, time);
		f1 = GET_REAL (L"End F1");
		f2 = GET_REAL (L"End F2");
		checkF1F2 (me, &f1, &f2);
		if (! VowelEditor_Vowel_addData (me, vowel, time, f1, f2, f0)) goto end;
		
		GuiText_setString (my durationTextField, Melder_double (MICROSECPRECISION(duration)));
end:	
		if (Melder_hasError ())
		{
			forget (vowel);
			return 0;
		}
		
		forget (my vowel);
		my vowel = vowel;

		Graphics_updateWs (my g);	
	EDITOR_END
}

static int menu_cb_extendTrajectory (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	EDITOR_FORM (L"Extend Trajectory", 0);
		POSITIVE (L"To F1 (Hz)", L"500.0")
		POSITIVE (L"To F2 (Hz)", L"1500.0")
		POSITIVE (L"Extra duration (s)", L"0.1")
	EDITOR_OK
	EDITOR_DO
		Vowel thee = my vowel;
		double newDuration = thy xmax + GET_REAL (L"Extra duration");
		double f0 =  getF0 (&my f0, newDuration);
		double f1 = GET_REAL (L"To F1");
		double f2 = GET_REAL (L"To F2");
		thy xmax = thy pt -> xmax = thy ft -> xmax = newDuration;
		checkF1F2 (me, &f1, &f2);
		if (! VowelEditor_Vowel_addData (me, thee, newDuration, f1, f2, f0)) return 0;
		
		GuiText_setString (my durationTextField, Melder_double (MICROSECPRECISION(newDuration)));
		Graphics_updateWs (my g);
	EDITOR_END
}

static int menu_cb_modifyTrajectoryDuration (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	EDITOR_FORM (L"Modify duration", 0);
		POSITIVE (L"New duration (s)", L"0.5")
	EDITOR_OK
	EDITOR_DO
		GuiText_setString (my durationTextField, Melder_double (MICROSECPRECISION(GET_REAL (L"New duration"))));
	EDITOR_END
}

static int menu_cb_shiftTrajectory (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	EDITOR_FORM (L"Shift trajectory", 0);
		REAL (L"F1 (semitones)", L"0.5")
		REAL (L"F2 (semitones)", L"0.5")
	EDITOR_OK
	EDITOR_DO
		VowelEditor_shiftF1F2 (me, GET_REAL (L"F1"), GET_REAL (L"F2"));
		Graphics_updateWs (my g);
	EDITOR_END
}

static int menu_cb_showTrajectoryTimeMarkersEvery (EDITOR_ARGS)
{
	EDITOR_IAM (VowelEditor);
	EDITOR_FORM (L"Show trajectory time markers every", 0);
		REAL (L"Distance (s)", L"0.05")
	EDITOR_OK
	EDITOR_DO
		my markTraceEvery = GET_REAL (L"Distance");
		if (my markTraceEvery < 0) my markTraceEvery = 0;
		Graphics_updateWs (my g);
	EDITOR_END
}

/********** BUTTON METHODS **********/

static void gui_button_cb_play (I, GuiButtonEvent event)
{
	(void) event;
	iam (VowelEditor);
	Sound thee = VowelEditor_createTarget (me);
	Sound_play (thee, NULL, NULL);
	Graphics_updateWs (my g);
	forget (thee);
}

static void gui_button_cb_publish (I, GuiButtonEvent event)
{
	(void) event;
	iam (VowelEditor);
	Sound publish = VowelEditor_createTarget (me);
	if (publish == NULL) return;
	if (my publishCallback) my publishCallback (me, my publishClosure, publish);
}

static void gui_button_cb_reverse (I, GuiButtonEvent event)
{
	(void) event;
	iam (VowelEditor);
	
	VowelEditor_Vowel_reverseFormantTier (me);	
	struct structGuiButtonEvent play_event = { 0 };
	play_event.button = my playButton;
	gui_button_cb_play (me, &play_event);
}

/* Main drawing routine: it's been called after every call to Graphics_updateWs (g) */
static void gui_drawingarea_cb_expose (I, GuiDrawingAreaExposeEvent event) 
{
	iam (VowelEditor);
	(void) event;
	double ts = my vowel -> xmin, te = my vowel -> xmax;
	FormantTier ft = my vowel -> ft;
	static MelderString statusInfo = { 0 };
	if (my g == NULL) return;   // Could be the case in the very beginning.
	Graphics_clearWs (my g);
		
	appendF1F2F0 (&statusInfo, STATUSINFO_STARTINTR0, FormantTier_getValueAtTime (ft, 1, ts), 
		FormantTier_getValueAtTime (ft, 2, ts), getF0 (&my f0, ts), STATUSINFO_ENDING);
	GuiLabel_setString (my startInfo, statusInfo.string);
	MelderString_empty (&statusInfo);
	
	appendF1F2F0 (&statusInfo, STATUSINFO_ENDINTR0, FormantTier_getValueAtTime (ft, 1, te), 
		FormantTier_getValueAtTime (ft, 2, te), getF0 (&my f0, te), STATUSINFO_ENDING);
	GuiLabel_setString (my endInfo, statusInfo.string);
	MelderString_empty (&statusInfo);
	
	Graphics_setGrey (my g, 0.9);
	Graphics_fillRectangle (my g, 0, 1, 0, 1);
	Graphics_setInner (my g);
	Graphics_setWindow (my g, 0, 1, 0, 1);
	Graphics_setGrey (my g, 1);
	Graphics_fillRectangle (my g, 0, 1, 0, 1);
	Graphics_unsetInner (my g);
	Graphics_setGrey (my g, 0);

	VowelEditor_drawBackground (me, my g);
	FormantTier_drawF1F2Trajectory (my vowel -> ft, my g, my f1min, my f1max, my f2min, my f2max, my markTraceEvery, my width);
}

static void gui_drawingarea_cb_resize (I, GuiDrawingAreaResizeEvent event)
{
	iam (VowelEditor);
	(void) me;
	(void) event;
	if (me == NULL || my g == NULL) return;
	my height = GuiObject_getHeight (my drawingArea);
	my width = GuiObject_getWidth (my drawingArea);
	Graphics_setWsViewport (my g, 0, my width , 0, my height);
	Graphics_setWsWindow (my g, 0, my width, 0, my height);
	Graphics_setViewport (my g, 0, my width, 0, my height);
	Graphics_updateWs (my g);
}

static int VowelEditor_Vowel_updateTiers (VowelEditor me, Vowel thee, double time, double x, double y)
{
	double f3, b3, f4, b4;
	if (time > thy xmax)
	{
		thy xmax = time;
		thy ft -> xmax = time;
		thy pt -> xmax = time;
	}
	double f0 = getF0 (& my f0, time), f1, f2;
	FormantPoint point = FormantPoint_create (time);
	
	if (point == NULL) return 0;
	
	VowelEditor_getF1F2FromXY (me, x, y, &f1, &f2);
	VowelEditor_getF3F4 (me, f1, f2, &f3, &b3, &f4, &b4);
	
	point -> formant[0] = f1;
	point -> bandwidth[0] = f1 / 10;
	point -> formant[1] = f2;
	point -> bandwidth[1] = f2 / 10;
	point -> formant[2] = f3;
	point -> bandwidth[2] = b3;
	point -> formant[3] = f4;
	point -> bandwidth[3] = b4;
	point -> numberOfFormants = 4;
	return Collection_addItem (thy ft -> points, point) && RealTier_addPoint (thy pt, time, f0);
}

// shift key always extends what already is. 
// Special case : !soundFollowsMouse. The first click just defines the vowel's first f1f2-position, 
static void gui_drawingarea_cb_click (I, GuiDrawingAreaClickEvent event)
{
	iam (VowelEditor);
	(void) event;
	Vowel thee;
	double x, y, xb, yb, tb, t, dt = 0;
	double t0 = Melder_clock ();
	long iskipped = 0;
	struct structGuiButtonEvent gb_event = { 0 };
	Graphics_setInner (my g);
	#if motif
	Graphics_getMouseLocation (my g, & x, & y);
	checkXY (&x, &y);
	#endif
	
	if (event->shiftKeyPressed)
	{
		VowelEditor_updateExtendDuration (me);
		(my shiftKeyPressed)++;
		thee = my vowel;
		dt = thy xmax + my extendDuration;
		t = 0 + dt;
		VowelEditor_Vowel_updateTiers (me, thee, t, x, y);
		GuiText_setString (my durationTextField, Melder_double (t));
		if (! my soundFollowsMouse) goto end;
	}
	else
	{
		t = 0;
		my shiftKeyPressed = 0;
		thee = Vowel_create (MINIMUM_SOUND_DURATION);
		VowelEditor_Vowel_updateTiers (me, thee, t, x, y);
		GuiText_setString (my durationTextField, Melder_double (t));
		if (! my soundFollowsMouse)
		{
			VowelEditor_Vowel_updateTiers (me, thee, MINIMUM_SOUND_DURATION, x, y);
			goto end;
		}
	}
	
	#if motif
	Graphics_xorOn (my g, Graphics_BLUE);
	while (Graphics_mouseStillDown (my g))
	{
		xb = x, yb = y, tb = t;
		t = Melder_clock () - t0 + dt; // Get relative time in seconds from the clock
		Graphics_getMouseLocation (my g, & x, & y);
		checkXY (&x, &y);
		// If the new point equals the previous one: no tier update
		if (xb == x && yb == y)
		{
			iskipped++;
			continue;
		}
		// Add previous point only if at least one previous event was skipped... 
		if (iskipped > 0) VowelEditor_Vowel_updateTiers (me, thee, tb, xb, yb);
		iskipped = 0;
		Graphics_line (my g, xb, yb, x, y);
		
		VowelEditor_Vowel_updateTiers (me, thee, t, x, y);
		GuiText_setString (my durationTextField, Melder_double (MICROSECPRECISION(t)));
	}
	t = Melder_clock () - t0;
	// To prevent ultra short clicks we set a minimum of 0.01 s duration
	if (t < MINIMUM_SOUND_DURATION) t = MINIMUM_SOUND_DURATION;
	t += dt;
	GuiText_setString (my durationTextField, Melder_double (MICROSECPRECISION(t)));
	VowelEditor_Vowel_updateTiers (me, thee, t, x, y);
	
	Graphics_xorOff (my g);
	#endif
	
end:	
	Graphics_unsetInner (my g);

	if (my shiftKeyPressed == 0)
	{
		forget (my vowel);
		my vowel = thee;
	}
	gb_event.button = my drawingArea;
	gui_button_cb_play (me, & gb_event);
}

static void gui_drawingarea_cb_key (I, GuiDrawingAreaKeyEvent event)
{
	iam (VowelEditor);
	(void) me;
	(void) event;
}

static void cb_publish (Any editor, void *closure, Any publish)
{
	(void) editor;
	(void) closure;
	if (! praat_new1 (publish, NULL)) { Melder_flushError (NULL); return; }
	praat_updateSelection ();
}

static void updateWidgets (I)
{
	iam (VowelEditor);
	(void) me;
}

static void destroy (I)
{
	iam (VowelEditor);
	forget (my g);
	forget (my marks);
	forget (my source);
	forget (my target);
	forget (my vowel);
	inherited (VowelEditor) destroy (me);
}

static void createMenus (I)
{
	iam (VowelEditor);
	inherited (VowelEditor) createMenus (me);

	Editor_addCommand (me, L"File", L"Preferences...", 0, menu_cb_prefs);
	Editor_addCommand (me, L"File", L"-- publish data --", 0, NULL);
	Editor_addCommand (me, L"File", L"Publish Sound", 0, menu_cb_publishSound);
	Editor_addCommand (me, L"File", L"Extract formant tier", 0, menu_cb_extract_FormantTier);
	Editor_addCommand (me, L"File", L"Extract pitch tier", 0, menu_cb_extract_PitchTier);
	Editor_addCommand (me, L"File", L"-- script stuff --", 0, NULL);
	Editor_addCommand (me, L"File", L"Draw trajectory...", 0, menu_cb_drawTrajectory);
	Editor_addCommand (me, L"Edit", L"Show one vowel mark...", 0, menu_cb_showOneVowelMark);
	Editor_addCommand (me, L"Edit", L"Show vowel marks...", 0, menu_cb_showVowelMarks);
	Editor_addCommand (me, L"Edit", L"-- f0 --", 0, NULL);
	Editor_addCommand (me, L"Edit", L"Set F0...", 0, menu_cb_setF0);
	Editor_addCommand (me, L"Edit", L"Set F3 & F4...", 0, menu_cb_setF3F4);
	Editor_addCommand (me, L"Edit", L"-- trajectory commands --", 0, NULL);
	Editor_addCommand (me, L"Edit", L"Reverse trajectory", 0, menu_cb_reverseTrajectory);
	Editor_addCommand (me, L"Edit", L"Modify trajectory duration...", 0, menu_cb_modifyTrajectoryDuration);
	Editor_addCommand (me, L"Edit", L"New trajectory...", 0, menu_cb_newTrajectory);
	Editor_addCommand (me, L"Edit", L"Extend trajectory...", 0, menu_cb_extendTrajectory);
	Editor_addCommand (me, L"Edit", L"Shift trajectory...", 0, menu_cb_shiftTrajectory);
	Editor_addCommand (me, L"Edit", L"Show trajectory time markers every...", 0, menu_cb_showTrajectoryTimeMarkersEvery);
}

static void createHelpMenuItems (I, EditorMenu menu) {
	iam (VowelEditor);
	inherited (VowelEditor) createHelpMenuItems (me, menu);
	EditorMenu_addCommand (menu, L"VowelEditor help", '?', menu_cb_help);
}

static void createChildren (I)
{
	iam (VowelEditor);
	double button_width = 60, text_width = 95, status_info_width = 290;
	double left, right, top, bottom, bottom_widgets_top, bottom_widgets_bottom, bottom_widgets_halfway;
	Widget form;
	
	// Origin is top left!
	
	#if gtk
	form = my dialog; /* TODO: ?? */
	#elif motif
	form = XmCreateForm (my dialog, "buttons", NULL, 0);
	XtVaSetValues (form,
		XmNleftAttachment, XmATTACH_FORM, XmNrightAttachment, XmATTACH_FORM,
		XmNtopAttachment, XmATTACH_FORM, XmNtopOffset, Machine_getMenuBarHeight (),
		XmNbottomAttachment, XmATTACH_FORM,
		XmNtraversalOn, False,   /* Needed in order to redirect all keyboard input to the text widget?? */
		NULL);
	#endif
		
	// Three buttons on a row: Play, Reverse, Publish
	left = 10; right = left + button_width; 
	bottom_widgets_top = top = -MARGIN_BOTTOM +10; bottom_widgets_bottom = bottom = -STATUS_INFO;
	my playButton = GuiButton_createShown (form, left, right, top, bottom, L"Play", gui_button_cb_play, me, 0);
	left = right + 10; right = left + button_width;
	my reverseButton = GuiButton_createShown (form, left, right, top, bottom, L"Reverse", gui_button_cb_reverse, me, 0);
	left = right + 10; right = left + button_width;
	my publishButton = GuiButton_createShown (form, left, right, top, bottom, L"Publish", gui_button_cb_publish, me, 0);
	
	// Four Text widgets with the label on top: Duration, Extend, F0, Slope
	// Make the F0 slope button 10 wider to accomodate the text
	// We wil not use a callback from a Text widget. It will get called multiple times during the editing 
	// of the text. Better to have all editing done and then query the widget for its value!
	left = right + 10; right = left + text_width; bottom_widgets_halfway = bottom = (top + bottom) / 2; top = bottom_widgets_top; 
	my durationLabel = GuiLabel_createShown (form, left, right, top , bottom, L"Duration (s):", 0);
	top = bottom; bottom = bottom_widgets_bottom;
	my durationTextField = GuiText_createShown (form, left, right, top, bottom, 0);
	
	left = right + 10; right = left + text_width; top = bottom_widgets_top; bottom = bottom_widgets_halfway;
	my extendLabel = GuiLabel_createShown (form, left, right, top, bottom, L"Extend (s):", 0);
	top = bottom; bottom = bottom_widgets_bottom;
	my extendTextField = GuiText_createShown (form, left, right, top, bottom, 0);
	
	left = right + 10; right = left + text_width; top = bottom_widgets_top; bottom = bottom_widgets_halfway;
	my f0Label = GuiLabel_createShown (form, left, right, top, bottom, L"Start F0 (Hz):", 0);
	top = bottom; bottom = bottom_widgets_bottom;
	my f0TextField = GuiText_createShown (form, left, right, top, bottom, 0);
	
	left = right + 10; right = left + text_width + 10; top = bottom_widgets_top; bottom = bottom_widgets_halfway;
	my f0SlopeLabel = GuiLabel_createShown (form, left, right, top, bottom, L"F0 slope (oct/s):", 0);
	top = bottom; bottom = bottom_widgets_bottom;
	my f0SlopeTextField = GuiText_createShown (form, left, right, top, bottom, 0);
		
	// The status startInfo and endInfo widget at the bottom:
	
	bottom = -(STATUS_INFO - Gui_LABEL_HEIGHT) / 2; top = bottom - Gui_LABEL_HEIGHT; left = MARGIN_LEFT; right = left + status_info_width;
	my startInfo = GuiLabel_createShown (form, left, right, top, bottom, L"", 0);
	
	left = right; right = left + status_info_width;
	my endInfo = GuiLabel_createShown (form, left, right, top, bottom, L"", 0);
		
	/***** Create drawing area. *****/
	// Approximately square because for our defaults: f1min=200, f1max=1000 and f2min = 500, f2mx = 2500,
	// log distances are equal (log (1000/200) == log (2500/500) ).
	my drawingArea = GuiDrawingArea_createShown (form, 0, 0, 0, -MARGIN_BOTTOM,
		gui_drawingarea_cb_expose, gui_drawingarea_cb_click, gui_drawingarea_cb_key, gui_drawingarea_cb_resize, me, 0);
	my height = GuiObject_getHeight (my drawingArea);
	my width = GuiObject_getWidth (my drawingArea);
	
	GuiObject_show (form);
}

static void dataChanged (I)
{
	iam (VowelEditor);
	(void) me;
}

class_methods (VowelEditor, Editor) {
	class_method (destroy)
	class_method (dataChanged)
	class_method (createChildren)
	class_method (createMenus)
	class_method (createHelpMenuItems)
	class_methods_end
}

static int VowelEditor_setSource (VowelEditor me)
{
	PitchTier pt = NULL; Sound thee = NULL;
		
	pt = VowelEditor_to_PitchTier (me, my maximumDuration);
	if (pt == NULL) return 0;
	thee = PitchTier_to_Sound_pulseTrain (pt, my f0.samplingFrequency, my f0.adaptFactor, my f0.adaptTime, my f0.interpolationDepth, 0);
	if (thee == NULL) goto end;
	
	if (my source != NULL) forget (my source);
	my source = thee;

end:
	forget (pt); 
	return ! Melder_hasError ();
}
// 
static Sound VowelEditor_createTarget (VowelEditor me)
{
	Sound thee = NULL;
	VowelEditor_updateVowel (me); // update pitch and duration
	thee = Vowel_to_Sound_pulses (my vowel, 44100, 0.7, 0.05, 30);
	if (thee == NULL) return NULL;
	Vector_scale (thee, 0.99);
	Sound_fadeIn (thee, 0.005, 1);
	Sound_fadeOut(thee, 0.005);
	return thee;	
}

VowelEditor VowelEditor_create (Widget parent, const wchar_t *title, Any data)
{
	VowelEditor me = new (VowelEditor);
	if (me == NULL || ! Editor_init (me, parent, 20, 40, 650, 650, title, data)) goto end;
	#if motif
	Melder_assert (XtWindow (my drawingArea));
	#endif
	my g = Graphics_create_xmdrawingarea (my drawingArea);
	Graphics_setFontSize (my g, 10);
	VowelEditor_prefs ();
	Editor_setPublishCallback (me, cb_publish, NULL);
	
	my f1min = prefs.f1min;
	my f1max = prefs.f1max;
	my f2min = prefs.f2min;
	my f2max = prefs.f2max;
	my frequencyScale = prefs.frequencyScale;
	my axisOrientation = prefs.axisOrientation;
	my speakerType = prefs.speakerType;
	my soundFollowsMouse = prefs.soundFollowsMouse;
	if (! VowelEditor_setMarks (me, 2, my speakerType)) goto end;
	if (! VowelEditor_setF3F4 (me, prefs.f3, prefs.b3, prefs.f4, prefs.b4)) goto end;
	my maximumDuration = BUFFER_SIZE_SEC;
	my extendDuration = 0.05;
	if (my data != NULL)
	{
		my vowel = Data_copy (data);
		if (my vowel == NULL) goto end;
	}
	else
	{
		my vowel = Vowel_create_twoFormantSchwa (0.2);
	}
	my markTraceEvery = 0.05; 
	my f0 = f0default;
	if (! VowelEditor_setSource (me)) goto end;
	my target = Sound_createSimple (1, my maximumDuration, my f0.samplingFrequency);
	GuiText_setString (my f0TextField, Melder_double (my f0.start));
	GuiText_setString (my f0SlopeTextField, Melder_double (my f0.slopeOctPerSec));
	GuiText_setString (my durationTextField, L"0.2"); // Source has been created
	GuiText_setString (my extendTextField, Melder_double (my extendDuration));
	my grid = griddefault;
	struct structGuiDrawingAreaResizeEvent event = { 0 };
	event.widget = my drawingArea;
	gui_drawingarea_cb_resize (me, & event);
	updateWidgets (me);

end:
	if (Melder_hasError ()) forget (me);
	return me;
}

/* End of file VowelEditor.c */
