#define __SP_PAINT_SELECTOR_C__

/*
 * SPPaintSelector
 *
 * Generic paint selector widget
 *
 * Copyright (C) Lauris 2002
 *
 */

#define noSP_PS_VERBOSE

#include <config.h>

#include <math.h>
#include <string.h>
#include <stdlib.h>

#include <libnr/nr-values.h>
#include <libnr/nr-matrix.h>

#include <gtk/gtksignal.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtkradiobutton.h>
#include <gtk/gtkhseparator.h>
#include <gtk/gtkframe.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkoptionmenu.h>
#include "menu.h"
#include <gtk/gtkmenuitem.h>
#include <gtk/gtkimage.h>

#include "../sp-item.h"
#include "../sp-gradient.h"
#include "../helper/sp-intl.h"
#include "../inkscape-stock.h"

#include "sp-color-selector.h"
#include "sp-color-notebook.h"
/* fixme: Move it from dialogs to here */
#include "gradient-selector.h"

#include "paint-selector.h"

enum {
	MODE_CHANGED,
	GRABBED,
	DRAGGED,
	RELEASED,
	CHANGED,
	LAST_SIGNAL
};

static void sp_paint_selector_class_init (SPPaintSelectorClass *klass);
static void sp_paint_selector_init (SPPaintSelector *slider);
static void sp_paint_selector_destroy (GtkObject *object);

static GtkWidget *sp_paint_selector_style_button_add (SPPaintSelector *psel, const gchar *px, SPPaintSelectorMode mode, GtkRadioButton *last);
static void sp_paint_selector_style_button_toggled (GtkToggleButton *tb, SPPaintSelector *psel);

static void sp_paint_selector_set_mode_empty (SPPaintSelector *psel);
static void sp_paint_selector_set_mode_multiple (SPPaintSelector *psel);
static void sp_paint_selector_set_mode_none (SPPaintSelector *psel);
static void sp_paint_selector_set_mode_color (SPPaintSelector *psel, SPPaintSelectorMode mode);
static void sp_paint_selector_set_mode_gradient (SPPaintSelector *psel, SPPaintSelectorMode mode);

static void sp_paint_selector_set_style_buttons (SPPaintSelector *psel, GtkWidget *active);

static GtkVBoxClass *parent_class;
static guint psel_signals[LAST_SIGNAL] = {0};

GtkType
sp_paint_selector_get_type (void)
{
	static GtkType type = 0;
	if (!type) {
		GtkTypeInfo info = {
			"SPPaintSelector",
			sizeof (SPPaintSelector),
			sizeof (SPPaintSelectorClass),
			(GtkClassInitFunc) sp_paint_selector_class_init,
			(GtkObjectInitFunc) sp_paint_selector_init,
			NULL, NULL, NULL
		};
		type = gtk_type_unique (GTK_TYPE_VBOX, &info);
	}
	return type;
}

static void
sp_paint_selector_class_init (SPPaintSelectorClass *klass)
{
	GtkObjectClass *object_class;
	GtkWidgetClass *widget_class;

	object_class = (GtkObjectClass *) klass;
	widget_class = (GtkWidgetClass *) klass;

	parent_class = (GtkVBoxClass*)gtk_type_class (GTK_TYPE_VBOX);

	psel_signals[MODE_CHANGED] = gtk_signal_new ("mode_changed",
						 (GtkSignalRunType)(GTK_RUN_FIRST | GTK_RUN_NO_RECURSE),
						 GTK_CLASS_TYPE(object_class),
						 GTK_SIGNAL_OFFSET (SPPaintSelectorClass, mode_changed),
						 gtk_marshal_NONE__UINT,
						 GTK_TYPE_NONE, 1, GTK_TYPE_UINT);
	psel_signals[GRABBED] =  gtk_signal_new ("grabbed",
						 (GtkSignalRunType)(GTK_RUN_FIRST | GTK_RUN_NO_RECURSE),
						 GTK_CLASS_TYPE(object_class),
						 GTK_SIGNAL_OFFSET (SPPaintSelectorClass, grabbed),
						 gtk_marshal_NONE__NONE,
						 GTK_TYPE_NONE, 0);
	psel_signals[DRAGGED] =  gtk_signal_new ("dragged",
						 (GtkSignalRunType)(GTK_RUN_FIRST | GTK_RUN_NO_RECURSE),
						 GTK_CLASS_TYPE(object_class),
						 GTK_SIGNAL_OFFSET (SPPaintSelectorClass, dragged),
						 gtk_marshal_NONE__NONE,
						 GTK_TYPE_NONE, 0);
	psel_signals[RELEASED] = gtk_signal_new ("released",
						 (GtkSignalRunType)(GTK_RUN_FIRST | GTK_RUN_NO_RECURSE),
						 GTK_CLASS_TYPE(object_class),
						 GTK_SIGNAL_OFFSET (SPPaintSelectorClass, released),
						 gtk_marshal_NONE__NONE,
						 GTK_TYPE_NONE, 0);
	psel_signals[CHANGED] =  gtk_signal_new ("changed",
						 (GtkSignalRunType)(GTK_RUN_FIRST | GTK_RUN_NO_RECURSE),
						 GTK_CLASS_TYPE(object_class),
						 GTK_SIGNAL_OFFSET (SPPaintSelectorClass, changed),
						 gtk_marshal_NONE__NONE,
						 GTK_TYPE_NONE, 0);

	object_class->destroy = sp_paint_selector_destroy;
}

#define XPAD 4
#define YPAD 1

static void
sp_paint_selector_init (SPPaintSelector *psel)
{
	GtkWidget *w;

	psel->mode = (SPPaintSelectorMode)-1; // huh?  do you mean 0xff?

	/* Paint style button box */
	psel->style = gtk_hbox_new (FALSE, 0);
	gtk_widget_show (psel->style);
	gtk_container_set_border_width (GTK_CONTAINER (psel->style), 4);
	gtk_box_pack_start (GTK_BOX (psel), psel->style, FALSE, FALSE, 0);

	/* Buttons */
	psel->none = sp_paint_selector_style_button_add (psel, INKSCAPE_STOCK_FILL_NONE,
							 SP_PAINT_SELECTOR_MODE_NONE, NULL);
	psel->solid = sp_paint_selector_style_button_add (psel, INKSCAPE_STOCK_FILL_SOLID,
							  SP_PAINT_SELECTOR_MODE_COLOR_RGB, GTK_RADIO_BUTTON (psel->none));
	psel->gradient = sp_paint_selector_style_button_add (psel, INKSCAPE_STOCK_FILL_GRADIENT,
							     SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR, GTK_RADIO_BUTTON (psel->solid));
	psel->radial = sp_paint_selector_style_button_add (psel, INKSCAPE_STOCK_FILL_RADIAL,
							   SP_PAINT_SELECTOR_MODE_GRADIENT_RADIAL, GTK_RADIO_BUTTON (psel->gradient));

	/* Horizontal separator */
	w = gtk_hseparator_new ();
	gtk_widget_show (w);
	gtk_box_pack_start (GTK_BOX (psel), w, FALSE, FALSE, 0);

	/* Frame */
	psel->frame = gtk_frame_new ("");
	gtk_widget_show (psel->frame);
	gtk_container_set_border_width (GTK_CONTAINER (psel->frame), 4);
	gtk_box_pack_start (GTK_BOX (psel), psel->frame, TRUE, TRUE, 0);

	/* Last used color */
	sp_color_set_rgb_float (&psel->color, 0.0, 0.0, 0.0);
	psel->alpha = 1.0;
}

static void
sp_paint_selector_destroy (GtkObject *object)
{
	SPPaintSelector *psel;

	psel = SP_PAINT_SELECTOR (object);

	if (((GtkObjectClass *) (parent_class))->destroy)
		(* ((GtkObjectClass *) (parent_class))->destroy) (object);
}

static GtkWidget *
sp_paint_selector_style_button_add (SPPaintSelector *psel, const gchar *pixmap, SPPaintSelectorMode mode, GtkRadioButton *last)
{
	GtkWidget *b, *w;

	b = gtk_radio_button_new ((last) ? gtk_radio_button_group (last) : NULL);
	gtk_widget_show (b);
	gtk_toggle_button_set_mode (GTK_TOGGLE_BUTTON (b), FALSE);
	gtk_object_set_data (GTK_OBJECT (b), "mode", GUINT_TO_POINTER (mode));
	w = gtk_image_new_from_stock (pixmap, GTK_ICON_SIZE_LARGE_TOOLBAR);
	gtk_widget_show (w);
	gtk_container_add (GTK_CONTAINER (b), w);
	gtk_box_pack_start (GTK_BOX (psel->style), b, FALSE, FALSE, 0);
	gtk_signal_connect (GTK_OBJECT (b), "toggled", GTK_SIGNAL_FUNC (sp_paint_selector_style_button_toggled), psel);

	return b;
}

static void
sp_paint_selector_style_button_toggled (GtkToggleButton *tb, SPPaintSelector *psel)
{
	if (!psel->update && gtk_toggle_button_get_active (tb)) {
		sp_paint_selector_set_mode (psel, (SPPaintSelectorMode)GPOINTER_TO_UINT (gtk_object_get_data (GTK_OBJECT (tb), "mode")));
	}
}

GtkWidget *
sp_paint_selector_new (void)
{
	SPPaintSelector *psel;

	psel = (SPPaintSelector*)gtk_type_new (SP_TYPE_PAINT_SELECTOR);

	sp_paint_selector_set_mode (psel, SP_PAINT_SELECTOR_MODE_MULTIPLE);

	return GTK_WIDGET (psel);
}

void
sp_paint_selector_set_mode (SPPaintSelector *psel, SPPaintSelectorMode mode)
{
	if (psel->mode != mode) {
		psel->update = TRUE;
#ifdef SP_PS_VERBOSE
		g_print ("Mode change %d -> %d\n", psel->mode, mode);
#endif
		switch (mode) {
		case SP_PAINT_SELECTOR_MODE_EMPTY:
			sp_paint_selector_set_mode_empty (psel);
			break;
		case SP_PAINT_SELECTOR_MODE_MULTIPLE:
			sp_paint_selector_set_mode_multiple (psel);
			break;
		case SP_PAINT_SELECTOR_MODE_NONE:
			sp_paint_selector_set_mode_none (psel);
			break;
		case SP_PAINT_SELECTOR_MODE_COLOR_RGB:
		case SP_PAINT_SELECTOR_MODE_COLOR_CMYK:
			sp_paint_selector_set_mode_color (psel, mode);
			break;
		case SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR:
		case SP_PAINT_SELECTOR_MODE_GRADIENT_RADIAL:
			sp_paint_selector_set_mode_gradient (psel, mode);
			break;
		default:
			g_warning ("file %s: line %d: Unknown paint mode %d", __FILE__, __LINE__, mode);
			break;
		}
		psel->mode = mode;
		gtk_signal_emit (GTK_OBJECT (psel), psel_signals[MODE_CHANGED], psel->mode);
		psel->update = FALSE;
	}
}

void
sp_paint_selector_set_color_alpha (SPPaintSelector *psel, const SPColor *color, float alpha)
{
	g_return_if_fail( ( 0.0 <= alpha ) && ( alpha <= 1.0 ) );
	SPColorSelector *csel;
	SPColor oldColor;
	gfloat oldAlpha;
	guint32 oldRgba;
	guint32 rgba;

	if ( sp_color_get_colorspace_type (color) == SP_COLORSPACE_TYPE_CMYK )
	{
#ifdef SP_PS_VERBOSE
		g_print ("PaintSelector set CMYKA\n");
#endif
		sp_paint_selector_set_mode (psel, SP_PAINT_SELECTOR_MODE_COLOR_CMYK);
	}
	else
	{
#ifdef SP_PS_VERBOSE
		g_print ("PaintSelector set RGBA\n");
#endif
		sp_paint_selector_set_mode (psel, SP_PAINT_SELECTOR_MODE_COLOR_RGB);
	}

	csel = (SPColorSelector*)gtk_object_get_data (GTK_OBJECT (psel->selector), "color-selector");
	csel->base->getColorAlpha( oldColor, &oldAlpha );
	oldRgba = sp_color_get_rgba32_falpha( &oldColor, oldAlpha );
	rgba = sp_color_get_rgba32_falpha( &*color, alpha );
	if ( rgba != oldRgba )
	{
		csel->base->setColorAlpha( *color, alpha );
	}
}

void
sp_paint_selector_set_gradient_linear (SPPaintSelector *psel, SPGradient *vector)
{
	SPGradientSelector *gsel;
#ifdef SP_PS_VERBOSE
	g_print ("PaintSelector set GRADIENT LINEAR\n");
#endif
	sp_paint_selector_set_mode (psel, SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR);

	gsel = (SPGradientSelector*)gtk_object_get_data (GTK_OBJECT (psel->selector), "gradient-selector");

	sp_gradient_selector_set_mode (gsel, SP_GRADIENT_SELECTOR_MODE_LINEAR);
	sp_gradient_selector_set_vector (gsel, (vector) ? SP_OBJECT_DOCUMENT (vector) : NULL, vector);
}

void
sp_paint_selector_set_lgradient_position (SPPaintSelector *psel, gdouble x0, gdouble y0, gdouble x1, gdouble y1)
{
	SPGradientSelector *gsel;

	g_return_if_fail (psel != NULL);
	g_return_if_fail (SP_IS_PAINT_SELECTOR (psel));
	g_return_if_fail (psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR);

	gsel = (SPGradientSelector*)gtk_object_get_data (GTK_OBJECT (psel->selector), "gradient-selector");

	sp_gradient_selector_set_lgradient_position (gsel, x0, y0, x1, y1);
}

void
sp_paint_selector_set_gradient_radial (SPPaintSelector *psel, SPGradient *vector)
{
	SPGradientSelector *gsel;
#ifdef SP_PS_VERBOSE
	g_print ("PaintSelector set GRADIENT RADIAL\n");
#endif
	sp_paint_selector_set_mode (psel, SP_PAINT_SELECTOR_MODE_GRADIENT_RADIAL);

	gsel = (SPGradientSelector*)gtk_object_get_data (GTK_OBJECT (psel->selector), "gradient-selector");

	sp_gradient_selector_set_mode (gsel, SP_GRADIENT_SELECTOR_MODE_RADIAL);
	sp_gradient_selector_set_vector (gsel, (vector) ? SP_OBJECT_DOCUMENT (vector) : NULL, vector);
}

void
sp_paint_selector_set_rgradient_position (SPPaintSelector *psel, gdouble cx, gdouble cy, gdouble fx, gdouble fy, gdouble r)
{
	SPGradientSelector *gsel;

	g_return_if_fail (psel != NULL);
	g_return_if_fail (SP_IS_PAINT_SELECTOR (psel));
	g_return_if_fail (psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_RADIAL);

	gsel = (SPGradientSelector*)gtk_object_get_data (GTK_OBJECT (psel->selector), "gradient-selector");

	sp_gradient_selector_set_rgradient_position (gsel, cx, cy, fx, fy, r);
}

void
sp_paint_selector_set_gradient_bbox (SPPaintSelector *psel, gdouble x0, gdouble y0, gdouble x1, gdouble y1)
{
	SPGradientSelector *gsel;

	g_return_if_fail (psel != NULL);
	g_return_if_fail (SP_IS_PAINT_SELECTOR (psel));
	g_return_if_fail ((psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR) ||
			  (psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_RADIAL));

	gsel = (SPGradientSelector*)gtk_object_get_data (GTK_OBJECT (psel->selector), "gradient-selector");

	sp_gradient_selector_set_bbox (gsel, x0, y0, x1, y1);
}

void
sp_paint_selector_set_gradient_gs2d_matrix_f (SPPaintSelector *psel, NRMatrix *gs2d)
{
	SPGradientSelector *gsel;

	g_return_if_fail (psel != NULL);
	g_return_if_fail (SP_IS_PAINT_SELECTOR (psel));
	g_return_if_fail ((psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR) ||
			  (psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_RADIAL));

	gsel = (SPGradientSelector*)gtk_object_get_data (GTK_OBJECT (psel->selector), "gradient-selector");

	sp_gradient_selector_set_gs2d_matrix_f (gsel, gs2d);
}

void
sp_paint_selector_get_gradient_gs2d_matrix_f (SPPaintSelector *psel, NRMatrix *gs2d)
{
	SPGradientSelector *gsel;

	g_return_if_fail (psel != NULL);
	g_return_if_fail (SP_IS_PAINT_SELECTOR (psel));
	g_return_if_fail ((psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR) ||
			  (psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_RADIAL));

	gsel = (SPGradientSelector*)gtk_object_get_data (GTK_OBJECT (psel->selector), "gradient-selector");

	sp_gradient_selector_get_gs2d_matrix_f (gsel, gs2d);
}

void
sp_paint_selector_set_gradient_properties (SPPaintSelector *psel, SPGradientUnits units, SPGradientSpread spread)
{
	SPGradientSelector *gsel;
	g_return_if_fail (SP_IS_PAINT_SELECTOR (psel));
	g_return_if_fail ((psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR) ||
			  (psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_RADIAL));
	gsel = (SPGradientSelector*)gtk_object_get_data (GTK_OBJECT (psel->selector), "gradient-selector");
	sp_gradient_selector_set_units (gsel, units);
	sp_gradient_selector_set_spread (gsel, spread);
}

void
sp_paint_selector_get_gradient_properties (SPPaintSelector *psel, SPGradientUnits *units, SPGradientSpread *spread)
{
	SPGradientSelector *gsel;
	g_return_if_fail (SP_IS_PAINT_SELECTOR (psel));
	g_return_if_fail ((psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR) ||
			  (psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_RADIAL));
	gsel = (SPGradientSelector*)gtk_object_get_data (GTK_OBJECT (psel->selector), "gradient-selector");
	if (units) *units = (SPGradientUnits)gsel->gradientUnits;
	if (spread) *spread = (SPGradientSpread)gsel->gradientSpread;
}

/**
 * Ensures: (alpha == NULL) || (*alpha in [0.0, 1.0]).
 */
void
sp_paint_selector_get_color_alpha (SPPaintSelector *psel, SPColor *color, gfloat *alpha)
{
	SPColorSelector *csel;

	csel = (SPColorSelector*)gtk_object_get_data (GTK_OBJECT (psel->selector), "color-selector");

	csel->base->getColorAlpha( *color, alpha );

	g_assert( !alpha
		  || ( ( 0.0 <= *alpha )
		       && ( *alpha <= 1.0 ) ) );
}

SPGradient *
sp_paint_selector_get_gradient_vector (SPPaintSelector *psel)
{
	SPGradientSelector *gsel;

	g_return_val_if_fail ((psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR) ||
			      (psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_RADIAL), NULL);

	gsel = (SPGradientSelector*)gtk_object_get_data (GTK_OBJECT (psel->selector), "gradient-selector");

	return sp_gradient_selector_get_vector (gsel);
}

void
sp_paint_selector_get_gradient_position_floatv (SPPaintSelector *psel, gfloat *pos)
{
	SPGradientSelector *gsel;

	g_return_if_fail ((psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR) ||
			  (psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_RADIAL));

	gsel = (SPGradientSelector*)gtk_object_get_data (GTK_OBJECT (psel->selector), "gradient-selector");

	if (psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR) {
		sp_gradient_selector_get_lgradient_position_floatv (gsel, pos);
	} else {
		sp_gradient_selector_get_rgradient_position_floatv (gsel, pos);
	}
}

void
sp_paint_selector_write_lineargradient (SPPaintSelector *psel, SPLinearGradient *lg, SPItem *item)
{
	gfloat p[4], gp[4];
	NRMatrix fctm, gs2d, g2d, d2g, gs2g, g2gs;
	NRRect fbb;
	double e;
	SPGradientUnits units;
	SPGradientSpread spread;

	g_return_if_fail (psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR);

	/* Units have to be set before position calculations */
	sp_paint_selector_get_gradient_properties (psel, &units, &spread);
	sp_gradient_set_units (SP_GRADIENT (lg), units);
	sp_gradient_set_spread (SP_GRADIENT (lg), spread);
	/* Now position */
	sp_paint_selector_get_gradient_position_floatv (psel, p);
	/* Calculate raw gradient transform */
	sp_item_invoke_bbox (item, &fbb, NULL, TRUE);
	sp_item_i2doc_affine (item, &fctm);
	sp_paint_selector_get_gradient_gs2d_matrix_f (psel, &gs2d);
	sp_gradient_get_g2d_matrix_f (SP_GRADIENT (lg), &fctm, &fbb, &g2d);
	nr_matrix_invert (&d2g, &g2d);
	nr_matrix_multiply (&gs2g, &gs2d, &d2g);
	/* Normalize transform */
	gp[0] = NR_MATRIX_DF_TRANSFORM_X (&gs2g, p[0], p[1]);
	gp[1] = NR_MATRIX_DF_TRANSFORM_Y (&gs2g, p[0], p[1]);
	gp[2] = NR_MATRIX_DF_TRANSFORM_X (&gs2g, p[2], p[3]);
	gp[3] = NR_MATRIX_DF_TRANSFORM_Y (&gs2g, p[2], p[3]);
	e = NR_MATRIX_DF_EXPANSION (&gs2g);
	if (e < 0.001) e = 0.001;
	gs2g.c[0] /= e;
	gs2g.c[1] /= e;
	gs2g.c[2] /= e;
	gs2g.c[3] /= e;
	gs2g.c[4] = 0.0;
	gs2g.c[5] = 0.0;
	nr_matrix_multiply (&gs2d, &gs2g, &g2d);
	sp_gradient_set_gs2d_matrix_f (SP_GRADIENT (lg), &fctm, &fbb, &gs2d);
	nr_matrix_invert (&g2gs, &gs2g);
	p[0] = NR_MATRIX_DF_TRANSFORM_X (&g2gs, gp[0], gp[1]);
	p[1] = NR_MATRIX_DF_TRANSFORM_Y (&g2gs, gp[0], gp[1]);
	p[2] = NR_MATRIX_DF_TRANSFORM_X (&g2gs, gp[2], gp[3]);
	p[3] = NR_MATRIX_DF_TRANSFORM_Y (&g2gs, gp[2], gp[3]);
	sp_lineargradient_set_position (lg, p[0], p[1], p[2], p[3]);
}

void
sp_paint_selector_write_radialgradient (SPPaintSelector *psel, SPRadialGradient *rg, SPItem *item)
{
	gfloat p[5], gp[4];
	NRMatrix fctm, gs2d, g2d, d2g, gs2g, g2gs;
	NRRect fbb;
	double e;
	SPGradientUnits units;
	SPGradientSpread spread;

	g_return_if_fail (psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_RADIAL);

	sp_paint_selector_get_gradient_properties (psel, &units, &spread);
	sp_gradient_set_units (SP_GRADIENT (rg), units);
	sp_gradient_set_spread (SP_GRADIENT (rg), spread);
	/* Now position */
	sp_paint_selector_get_gradient_position_floatv (psel, p);
	/* Calculate raw gradient transform */
	sp_item_invoke_bbox (item, &fbb, NULL, TRUE);
	sp_item_i2doc_affine (item, &fctm);
	sp_paint_selector_get_gradient_gs2d_matrix_f (psel, &gs2d);
	sp_gradient_get_g2d_matrix_f (SP_GRADIENT (rg), &fctm, &fbb, &g2d);
	nr_matrix_invert (&d2g, &g2d);
	nr_matrix_multiply (&gs2g, &gs2d, &d2g);
	/* Normalize transform */
	gp[0] = NR_MATRIX_DF_TRANSFORM_X (&gs2g, p[0], p[1]);
	gp[1] = NR_MATRIX_DF_TRANSFORM_Y (&gs2g, p[0], p[1]);
	gp[2] = NR_MATRIX_DF_TRANSFORM_X (&gs2g, p[2], p[3]);
	gp[3] = NR_MATRIX_DF_TRANSFORM_Y (&gs2g, p[2], p[3]);
#if 1
	e = NR_MATRIX_DF_EXPANSION (&gs2g);
	if (e < 0.001) e = 0.001;
#else
	e = 1.0;
#endif
	gs2g.c[0] /= e;
	gs2g.c[1] /= e;
	gs2g.c[2] /= e;
	gs2g.c[3] /= e;
#if 1
	gs2g.c[4] = 0.0;
	gs2g.c[5] = 0.0;
#endif
	nr_matrix_multiply (&gs2d, &gs2g, &g2d);
	sp_gradient_set_gs2d_matrix_f (SP_GRADIENT (rg), &fctm, &fbb, &gs2d);
	nr_matrix_invert (&g2gs, &gs2g);
	p[0] = NR_MATRIX_DF_TRANSFORM_X (&g2gs, gp[0], gp[1]);
	p[1] = NR_MATRIX_DF_TRANSFORM_Y (&g2gs, gp[0], gp[1]);
	p[2] = NR_MATRIX_DF_TRANSFORM_X (&g2gs, gp[2], gp[3]);
	p[3] = NR_MATRIX_DF_TRANSFORM_Y (&g2gs, gp[2], gp[3]);
	p[4] *= e;
	sp_radialgradient_set_position (rg, p[0], p[1], p[2], p[3], p[4]);
}

void
sp_paint_selector_system_color_set (SPPaintSelector *psel, const SPColor *color, float opacity)
{
	g_return_if_fail( ( 0.0 <= opacity ) && ( opacity <= 1.0 ) );
	if ((psel->mode == SP_PAINT_SELECTOR_MODE_COLOR_RGB) ||
	    (psel->mode == SP_PAINT_SELECTOR_MODE_COLOR_CMYK)) {
		GtkToggleButton *gd;
		gd = (GtkToggleButton*)g_object_get_data (G_OBJECT (psel->selector), "get_dropper");
		if (gtk_toggle_button_get_active (gd)) {
			sp_paint_selector_set_color_alpha (psel, color, opacity);
		}
	}
}

static void
sp_paint_selector_set_mode_empty (SPPaintSelector *psel)
{
	sp_paint_selector_set_style_buttons (psel, NULL);
	gtk_widget_set_sensitive (psel->style, FALSE);

	if (psel->selector) {
		gtk_widget_destroy (psel->selector);
		psel->selector = NULL;
	}

	gtk_frame_set_label (GTK_FRAME (psel->frame), _("No objects"));
}

static void
sp_paint_selector_set_mode_multiple (SPPaintSelector *psel)
{
	sp_paint_selector_set_style_buttons (psel, NULL);
	gtk_widget_set_sensitive (psel->style, TRUE);

	if (psel->selector) {
		gtk_widget_destroy (psel->selector);
		psel->selector = NULL;
	}

	gtk_frame_set_label (GTK_FRAME (psel->frame), _("Multiple styles"));
}

static void
sp_paint_selector_set_mode_none (SPPaintSelector *psel)
{
	sp_paint_selector_set_style_buttons (psel, psel->none);
	gtk_widget_set_sensitive (psel->style, TRUE);

	if (psel->selector) {
		gtk_widget_destroy (psel->selector);
		psel->selector = NULL;
	}

	gtk_frame_set_label (GTK_FRAME (psel->frame), _("No paint"));
}

/* Color paint */

static void
sp_paint_selector_color_grabbed (SPColorSelector *csel, SPPaintSelector *psel)
{
	gtk_signal_emit (GTK_OBJECT (psel), psel_signals[GRABBED]);
}

static void
sp_paint_selector_color_dragged (SPColorSelector *csel, SPPaintSelector *psel)
{
	gtk_signal_emit (GTK_OBJECT (psel), psel_signals[DRAGGED]);
}

static void
sp_paint_selector_color_released (SPColorSelector *csel, SPPaintSelector *psel)
{
	gtk_signal_emit (GTK_OBJECT (psel), psel_signals[RELEASED]);
}

static void
sp_paint_selector_color_changed (SPColorSelector *csel, SPPaintSelector *psel)
{
	csel->base->getColorAlpha( psel->color, &psel->alpha );

	gtk_signal_emit (GTK_OBJECT (psel), psel_signals[CHANGED]);
}

static void
sp_paint_selector_set_mode_color (SPPaintSelector *psel, SPPaintSelectorMode mode)
{
	GtkWidget *csel;
	GtkWidget *cselmode;

	sp_paint_selector_set_style_buttons (psel, psel->solid);
	gtk_widget_set_sensitive (psel->style, TRUE);

	if ((psel->mode == SP_PAINT_SELECTOR_MODE_COLOR_RGB) || (psel->mode == SP_PAINT_SELECTOR_MODE_COLOR_CMYK)) {
		/* Already have color selector */
		csel = (GtkWidget*)gtk_object_get_data (GTK_OBJECT (psel->selector), "color-selector");
	} else {
		GtkWidget *vb;
		GtkWidget *hb;
		GtkWidget *cb;
		GtkWidget* l;
		GtkWidget* m;
		if (psel->selector) {
			gtk_widget_destroy (psel->selector);
			psel->selector = NULL;
		}
		/* Create new color selector */
		/* Create vbox */
		vb = gtk_vbox_new (FALSE, 4);
		gtk_widget_show (vb);

		/* Create hbox */
		hb = gtk_hbox_new (FALSE, 4);
		gtk_widget_show (hb);
		gtk_box_pack_start (GTK_BOX (vb), hb, FALSE, FALSE, 4);
		/* Label */
		l = gtk_label_new (_("Mode:"));
		gtk_widget_show (l);
		gtk_misc_set_alignment (GTK_MISC (l), 1.0, 0.5);
		gtk_box_pack_start (GTK_BOX (hb), l, FALSE, FALSE, 4);
		/* Create option menu */
		cselmode = gtk_option_menu_new ();
		gtk_widget_show (cselmode);
		/* Create menu */
		m = sp_menu_new ();
		gtk_widget_show (m);
		sp_menu_append (SP_MENU (m), _("RGB"), _("RGB Colorspace"), GUINT_TO_POINTER (SP_PAINT_SELECTOR_MODE_COLOR_RGB));
/* 		sp_menu_append (SP_MENU (m), _("HSV"), _("RGB Colorspace"), GUINT_TO_POINTER (SP_PAINT_SELECTOR_MODE_HSV)); */
		sp_menu_append (SP_MENU (m), _("CMYK"), _("CMYK Colorspace"), GUINT_TO_POINTER (SP_PAINT_SELECTOR_MODE_COLOR_CMYK));
/* 		gtk_signal_connect (GTK_OBJECT (m), "selected", */
/* 				    GTK_SIGNAL_FUNC (sp_paint_selector_color_mode_select), psel); */
		gtk_option_menu_set_menu (GTK_OPTION_MENU (cselmode), m);
		gtk_object_set_data (GTK_OBJECT (vb), "mode-menu", cselmode);
		gtk_box_pack_start (GTK_BOX (hb), cselmode, FALSE, FALSE, 0);
		/* Use dropper */
		cb = gtk_check_button_new_with_label (_("Get from dropper"));
		gtk_widget_show (cb);
		gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (cb), TRUE);
		gtk_box_pack_end (GTK_BOX (hb), cb, FALSE, FALSE, 4);
		g_object_set_data (G_OBJECT (vb), "get_dropper", cb);

		/* Color selector */
		csel = sp_color_selector_new (SP_TYPE_COLOR_NOTEBOOK, SP_COLORSPACE_TYPE_NONE);
		gtk_widget_show (csel);
		gtk_object_set_data (GTK_OBJECT (vb), "color-selector", csel);
		gtk_box_pack_start (GTK_BOX (vb), csel, TRUE, TRUE, 0);
		gtk_signal_connect (GTK_OBJECT (csel), "grabbed", GTK_SIGNAL_FUNC (sp_paint_selector_color_grabbed), psel);
		gtk_signal_connect (GTK_OBJECT (csel), "dragged", GTK_SIGNAL_FUNC (sp_paint_selector_color_dragged), psel);
		gtk_signal_connect (GTK_OBJECT (csel), "released", GTK_SIGNAL_FUNC (sp_paint_selector_color_released), psel);
		gtk_signal_connect (GTK_OBJECT (csel), "changed", GTK_SIGNAL_FUNC (sp_paint_selector_color_changed), psel);
		/* Pack everything to frame */
		gtk_container_add (GTK_CONTAINER (psel->frame), vb);
		psel->selector = vb;

		/* Set color */
		SP_COLOR_SELECTOR( csel )->base->setColorAlpha( psel->color, psel->alpha );

/*
		if (mode == SP_PAINT_SELECTOR_MODE_COLOR_RGB) {
			gtk_option_menu_set_history (GTK_OPTION_MENU (cselmode), (default_rgb_mode == SP_COLOR_SELECTOR_MODE_RGB) ? 0 : 1);
			sp_color_selector_set_mode (SP_COLOR_SELECTOR (csel), default_rgb_mode);
		} else {
			gtk_option_menu_set_history (GTK_OPTION_MENU (cselmode), 2);
			sp_color_selector_set_mode (SP_COLOR_SELECTOR (csel), SP_COLOR_SELECTOR_MODE_CMYK);
		}
*/
	}

	gtk_frame_set_label (GTK_FRAME (psel->frame), _("Color paint"));
#ifdef SP_PS_VERBOSE
	g_print ("Color req\n");
#endif
}

/* Gradient */

static void
sp_paint_selector_gradient_grabbed (SPColorSelector *csel, SPPaintSelector *psel)
{
	gtk_signal_emit (GTK_OBJECT (psel), psel_signals[GRABBED]);
}

static void
sp_paint_selector_gradient_dragged (SPColorSelector *csel, SPPaintSelector *psel)
{
	gtk_signal_emit (GTK_OBJECT (psel), psel_signals[DRAGGED]);
}

static void
sp_paint_selector_gradient_released (SPColorSelector *csel, SPPaintSelector *psel)
{
	gtk_signal_emit (GTK_OBJECT (psel), psel_signals[RELEASED]);
}

static void
sp_paint_selector_gradient_changed (SPColorSelector *csel, SPPaintSelector *psel)
{
	gtk_signal_emit (GTK_OBJECT (psel), psel_signals[CHANGED]);
}

static void
sp_paint_selector_set_mode_gradient (SPPaintSelector *psel, SPPaintSelectorMode mode)
{
	GtkWidget *gsel;

	/* fixme: We do not need function-wide gsel at all */

	if (mode == SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR) {
		sp_paint_selector_set_style_buttons (psel, psel->gradient);
	} else {
		sp_paint_selector_set_style_buttons (psel, psel->radial);
	}
	gtk_widget_set_sensitive (psel->style, TRUE);

	if ((psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR) || (psel->mode == SP_PAINT_SELECTOR_MODE_GRADIENT_RADIAL)) {
		/* Already have gradient selector */
		gsel = (GtkWidget*)gtk_object_get_data (GTK_OBJECT (psel->selector), "gradient-selector");
	} else {
		if (psel->selector) {
			gtk_widget_destroy (psel->selector);
			psel->selector = NULL;
		}
		/* Create new gradient selector */
		gsel = sp_gradient_selector_new ();
		gtk_widget_show (gsel);
		gtk_signal_connect (GTK_OBJECT (gsel), "grabbed", GTK_SIGNAL_FUNC (sp_paint_selector_gradient_grabbed), psel);
		gtk_signal_connect (GTK_OBJECT (gsel), "dragged", GTK_SIGNAL_FUNC (sp_paint_selector_gradient_dragged), psel);
		gtk_signal_connect (GTK_OBJECT (gsel), "released", GTK_SIGNAL_FUNC (sp_paint_selector_gradient_released), psel);
		gtk_signal_connect (GTK_OBJECT (gsel), "changed", GTK_SIGNAL_FUNC (sp_paint_selector_gradient_changed), psel);
		/* Pack everything to frame */
		gtk_container_add (GTK_CONTAINER (psel->frame), gsel);
		psel->selector = gsel;
		gtk_object_set_data (GTK_OBJECT (psel->selector), "gradient-selector", gsel);
	}

	/* Actually we have to set optiomenu history here */
	if (mode == SP_PAINT_SELECTOR_MODE_GRADIENT_LINEAR) {
		sp_gradient_selector_set_mode (SP_GRADIENT_SELECTOR (gsel), SP_GRADIENT_SELECTOR_MODE_LINEAR);
		gtk_frame_set_label (GTK_FRAME (psel->frame), _("Linear gradient"));
	} else {
		sp_gradient_selector_set_mode (SP_GRADIENT_SELECTOR (gsel), SP_GRADIENT_SELECTOR_MODE_RADIAL);
		gtk_frame_set_label (GTK_FRAME (psel->frame), _("Radial gradient"));
	}
#ifdef SP_PS_VERBOSE
	g_print ("Gradient req\n");
#endif
}

static void
sp_paint_selector_set_style_buttons (SPPaintSelector *psel, GtkWidget *active)
{
	gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (psel->none), (active == psel->none));
	gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (psel->solid), (active == psel->solid));
	gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (psel->gradient), (active == psel->gradient));
	gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (psel->radial), (active == psel->radial));
}

