#define __SP_GRADIENT_CONTEXT_C__

#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include <gdk/gdkkeysyms.h>

#include "macros.h"

#include "document.h"

#include "selection.h"

#include "desktop.h"

#include "desktop-handles.h"

#include "message-context.h"

#include "message-stack.h"

#include "pixmaps/cursor-gradient.xpm"

#include "pixmaps/cursor-gradient-add.xpm"

#include "pixmaps/cursor-gradient-delete.xpm"

#include "gradient-context.h"

#include "gradient-chemistry.h"

#include <glibmm/i18n.h>

#include "prefs-utils.h"

#include "gradient-drag.h"

#include "gradient-chemistry.h"

#include "xml/repr.h"

#include "sp-item.h"

#include "display/sp-ctrlline.h"

#include "sp-linear-gradient.h"

#include "sp-radial-gradient.h"

#include "sp-stop.h"

#include "svg/css-ostringstream.h"

#include "svg/svg-color.h"

#include "snap.h"

#include "sp-namedview.h"

static void sp_gradient_context_class_init(SPGradientContextClass *klass);

static void sp_gradient_context_init(SPGradientContext *gr_context);

static void sp_gradient_context_dispose(GObject *object);

static void sp_gradient_context_setup(SPEventContext *ec);

static gint sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event);

static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime);

static SPEventContextClass *parent_class;

GtkType sp_gradient_context_get_type()

{

static GType type = 0;

if (!type) {

GTypeInfo info = {

sizeof(SPGradientContextClass),

NULL, NULL,

(GClassInitFunc) sp_gradient_context_class_init,

NULL, NULL,

sizeof(SPGradientContext),

4,

(GInstanceInitFunc) sp_gradient_context_init,

NULL, /* value_table */

};

type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPGradientContext", &info, (GTypeFlags) 0);

}

return type;

}

static void sp_gradient_context_class_init(SPGradientContextClass *klass)

{

GObjectClass *object_class = (GObjectClass *) klass;

SPEventContextClass *event_context_class = (SPEventContextClass *) klass;

parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);

object_class->dispose = sp_gradient_context_dispose;

event_context_class->setup = sp_gradient_context_setup;

event_context_class->root_handler = sp_gradient_context_root_handler;

}

static void sp_gradient_context_init(SPGradientContext *gr_context)

{

SPEventContext *event_context = SP_EVENT_CONTEXT(gr_context);

gr_context->cursor_addnode = false;

event_context->cursor_shape = cursor_gradient_xpm;

event_context->hot_x = 4;

event_context->hot_y = 4;

event_context->xp = 0;

event_context->yp = 0;

event_context->tolerance = 6;

event_context->within_tolerance = false;

event_context->item_to_select = NULL;

}

static void sp_gradient_context_dispose(GObject *object)

{

SPGradientContext *rc = SP_GRADIENT_CONTEXT(object);

SPEventContext *ec = SP_EVENT_CONTEXT(object);

ec->enableGrDrag(false);

if (rc->_message_context) {

delete rc->_message_context;

}

G_OBJECT_CLASS(parent_class)->dispose(object);

}

static void sp_gradient_context_setup(SPEventContext *ec)

{

SPGradientContext *rc = SP_GRADIENT_CONTEXT(ec);

if (((SPEventContextClass *) parent_class)->setup) {

((SPEventContextClass *) parent_class)->setup(ec);

}

if (prefs_get_int_attribute("tools.gradient", "selcue", 1) != 0) {

ec->enableSelectionCue();

}

ec->enableGrDrag();

rc->_message_context = new Inkscape::MessageContext(sp_desktop_message_stack(ec->desktop));

}

sp_gradient_context_select_next (SPEventContext *event_context)

{

GrDrag *drag = event_context->_grdrag;

g_assert (drag);

drag->select_next();

}

sp_gradient_context_select_prev (SPEventContext *event_context)

{

GrDrag *drag = event_context->_grdrag;

g_assert (drag);

drag->select_prev();

}

static NR::Point

snap_vector_midpoint (NR::Point p, NR::Point begin, NR::Point end)

{

double length = NR::L2(end - begin);

NR::Point be = (end - begin) / length;

double r = NR::dot(p - begin, be);

if (r < 0.0) return begin;

if (r > length) return end;

return (begin + r * be);

}

static bool

sp_gradient_context_is_over_line (SPGradientContext *rc, SPItem *item, NR::Point event_p)

{

SPDesktop *desktop = SP_EVENT_CONTEXT (rc)->desktop;

//Translate mouse point into proper coord system

rc->mousepoint_doc = desktop->w2d(event_p);

SPCtrlLine* line = SP_CTRLLINE(item);

NR::Point nearest = snap_vector_midpoint (rc->mousepoint_doc, line->s, line->e);

double dist_screen = NR::L2 (rc->mousepoint_doc - nearest) * desktop->current_zoom();

double tolerance = (double) SP_EVENT_CONTEXT(rc)->tolerance;

bool close = (dist_screen < tolerance);

return close;

}

static guint32

average_color (guint32 c1, guint32 c2, gdouble p = 0.5)

{

guint32 r = (guint32) (SP_RGBA32_R_U (c1) * (1 - p) + SP_RGBA32_R_U (c2) * p);

guint32 g = (guint32) (SP_RGBA32_G_U (c1) * (1 - p) + SP_RGBA32_G_U (c2) * p);

guint32 b = (guint32) (SP_RGBA32_B_U (c1) * (1 - p) + SP_RGBA32_B_U (c2) * p);

guint32 a = (guint32) (SP_RGBA32_A_U (c1) * (1 - p) + SP_RGBA32_A_U (c2) * p);

return SP_RGBA32_U_COMPOSE (r, g, b, a);

}

static double

get_offset_between_points (NR::Point p, NR::Point begin, NR::Point end)

{

double length = NR::L2(end - begin);

NR::Point be = (end - begin) / length;

double r = NR::dot(p - begin, be);

if (r < 0.0) return 0.0;

if (r > length) return 1.0;

return (r / length);

}

static void

sp_gradient_context_add_stop_near_point (SPGradientContext *rc, SPItem *item, NR::Point mouse_p, guint32 etime)

{

// item is the selected item. mouse_p the location in doc coordinates of where to add the stop

SPEventContext *ec = SP_EVENT_CONTEXT(rc);

SPDesktop *desktop = SP_EVENT_CONTEXT (rc)->desktop;

double tolerance = (double) ec->tolerance;

gfloat offset; // type of SPStop.offset = gfloat

SPGradient *gradient;

bool fill_or_stroke = true;

bool r1_knot = false;

bool addknot = false;

do {

gradient = sp_item_gradient (item, fill_or_stroke);

if (SP_IS_LINEARGRADIENT(gradient)) {

NR::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);

NR::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);

NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end);

double dist_screen = NR::L2 (mouse_p - nearest) * desktop->current_zoom();

if ( dist_screen < tolerance ) {

// add the knot

offset = get_offset_between_points(nearest, begin, end);

addknot = true;

break; // break out of the while loop: add only one knot

}

} else if (SP_IS_RADIALGRADIENT(gradient)) {

NR::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);

NR::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);

NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end);

double dist_screen = NR::L2 (mouse_p - nearest) * desktop->current_zoom();

if ( dist_screen < tolerance ) {

offset = get_offset_between_points(nearest, begin, end);

addknot = true;

r1_knot = true;

break; // break out of the while loop: add only one knot

}

end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);

nearest = snap_vector_midpoint (mouse_p, begin, end);

dist_screen = NR::L2 (mouse_p - nearest) * desktop->current_zoom();

if ( dist_screen < tolerance ) {

offset = get_offset_between_points(nearest, begin, end);

addknot = true;

r1_knot = false;

break; // break out of the while loop: add only one knot

}

}

fill_or_stroke = !fill_or_stroke;

} while (!fill_or_stroke && !addknot) ;

if (addknot) {

SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);

SPStop* prev_stop = sp_first_stop(vector);

SPStop* next_stop = sp_next_stop(prev_stop);

while ( (next_stop) && (next_stop->offset < offset) ) {

prev_stop = next_stop;

next_stop = sp_next_stop(next_stop);

}

if (!next_stop) {

// logical error: the endstop should have offset 1 and should always be more than this offset here

return;

}

Inkscape::XML::Node *new_stop_repr = NULL;

new_stop_repr = SP_OBJECT_REPR(prev_stop)->duplicate(SP_OBJECT_REPR(vector)->document());

SP_OBJECT_REPR(vector)->addChild(new_stop_repr, SP_OBJECT_REPR(prev_stop));

SPStop *newstop = (SPStop *) SP_OBJECT_DOCUMENT(vector)->getObjectByRepr(new_stop_repr);

newstop->offset = offset;

sp_repr_set_css_double( SP_OBJECT_REPR(newstop), "offset", (double)offset);

guint32 const c1 = sp_stop_get_rgba32(prev_stop);

guint32 const c2 = sp_stop_get_rgba32(next_stop);

guint32 cnew = average_color (c1, c2, (offset - prev_stop->offset) / (next_stop->offset - prev_stop->offset));

Inkscape::CSSOStringStream os;

gchar c[64];

sp_svg_write_color (c, 64, cnew);

gdouble opacity = (gdouble) SP_RGBA32_A_F (cnew);

os << "stop-color:" << c << ";stop-opacity:" << opacity <<";";

SP_OBJECT_REPR (newstop)->setAttribute("style", os.str().c_str());

Inkscape::GC::release(new_stop_repr);

sp_document_done (SP_OBJECT_DOCUMENT (vector), SP_VERB_CONTEXT_GRADIENT,

_("Add gradient stop"));

ec->_grdrag->updateDraggers();

sp_gradient_ensure_vector (gradient);

if (vector->has_stops) {

int i = 0;

for ( SPObject *ochild = sp_object_first_child (SP_OBJECT(vector)) ; ochild != NULL ; ochild = SP_OBJECT_NEXT(ochild) ) {

if (SP_IS_STOP (ochild)) {

if ( SP_STOP(ochild) == newstop ) {

break;

} else {

i++;

}

}

}

gradient = sp_item_gradient (item, fill_or_stroke);

GrPointType pointtype = POINT_G_INVALID;

if (SP_IS_LINEARGRADIENT(gradient)) {

pointtype = POINT_LG_MID;

} else if (SP_IS_RADIALGRADIENT(gradient)) {

pointtype = r1_knot ? POINT_RG_MID1 : POINT_RG_MID2;

}

GrDragger *dragger = SP_EVENT_CONTEXT(rc)->_grdrag->getDraggerFor (item, pointtype, i, fill_or_stroke);

if (dragger && (etime == 0) ) {

ec->_grdrag->setSelected (dragger);

} else {

ec->_grdrag->grabKnot (item,

pointtype,

i,

fill_or_stroke, 99999, 99999, etime);

}

ec->_grdrag->local_change = true;

}

}

}

static gint

sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event)

{

static bool dragging;

SPDesktop *desktop = event_context->desktop;

Inkscape::Selection *selection = sp_desktop_selection (desktop);

SPGradientContext *rc = SP_GRADIENT_CONTEXT(event_context);

event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);

double const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px

GrDrag *drag = event_context->_grdrag;

g_assert (drag);

gint ret = FALSE;

switch (event->type) {

case GDK_2BUTTON_PRESS:

if ( event->button.button == 1 ) {

bool over_line = false;

SPCtrlLine *line = NULL;

if (drag->lines) {

for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {

line = (SPCtrlLine*) l->data;

over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) line, NR::Point(event->motion.x, event->motion.y));

}

}

if (over_line) {

sp_gradient_context_add_stop_near_point(rc, SP_ITEM(selection->itemList()->data), rc->mousepoint_doc, event->button.time);

} else {

for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {

SPItem *item = SP_ITEM(i->data);

SPGradientType new_type = (SPGradientType) prefs_get_int_attribute ("tools.gradient", "newgradient", SP_GRADIENT_TYPE_LINEAR);

guint new_fill = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);

SPGradient *vector = sp_gradient_vector_for_object(sp_desktop_document(desktop), desktop, SP_OBJECT (item), new_fill);

SPGradient *priv = sp_item_set_gradient(item, vector, new_type, new_fill);

sp_gradient_reset_to_userspace(priv, item);

}

sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,

_("Create default gradient"));

}

ret = TRUE;

}

break;

case GDK_BUTTON_PRESS:

if ( event->button.button == 1 && !event_context->space_panning ) {

NR::Point const button_w(event->button.x, event->button.y);

// save drag origin

event_context->xp = (gint) button_w[NR::X];

event_context->yp = (gint) button_w[NR::Y];

event_context->within_tolerance = true;

// remember clicked item, disregarding groups, honoring Alt; do nothing with Crtl to

// enable Ctrl+doubleclick of exactly the selected item(s)

if (!(event->button.state & GDK_CONTROL_MASK))

event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);

dragging = true;

/* Position center */

NR::Point const button_dt = desktop->w2d(button_w);

/* Snap center to nearest magnetic point */

SnapManager const &m = desktop->namedview->snap_manager;

rc->origin = m.freeSnap(Inkscape::Snapper::SNAPPOINT_BBOX | Inkscape::Snapper::SNAPPOINT_NODE, button_dt, NULL).getPoint();

ret = TRUE;

}

break;

case GDK_MOTION_NOTIFY:

if ( dragging

&& ( event->motion.state & GDK_BUTTON1_MASK ) && !event_context->space_panning )

{

if ( event_context->within_tolerance

&& ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )

&& ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {

break; // do not drag if we're within tolerance from origin

}

// Once the user has moved farther than tolerance from the original location

// (indicating they intend to draw, not click), then always process the

// motion notify coordinates as given (no snapping back to origin)

event_context->within_tolerance = false;

NR::Point const motion_w(event->motion.x,

event->motion.y);

NR::Point const motion_dt = event_context->desktop->w2d(motion_w);

sp_gradient_drag(*rc, motion_dt, event->motion.state, event->motion.time);

ret = TRUE;

} else {

bool over_line = false;

if (drag->lines) {

for (GSList *l = drag->lines; l != NULL; l = l->next) {

over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) l->data, NR::Point(event->motion.x, event->motion.y));

}

}

if (rc->cursor_addnode && !over_line) {

event_context->cursor_shape = cursor_gradient_xpm;

sp_event_context_update_cursor(event_context);

rc->cursor_addnode = false;

} else if (!rc->cursor_addnode && over_line) {

event_context->cursor_shape = cursor_gradient_add_xpm;

sp_event_context_update_cursor(event_context);

rc->cursor_addnode = true;

}

}

break;

case GDK_BUTTON_RELEASE:

event_context->xp = event_context->yp = 0;

if ( event->button.button == 1 && !event_context->space_panning ) {

if ( (event->button.state & GDK_CONTROL_MASK) && (event->button.state & GDK_MOD1_MASK ) ) {

bool over_line = false;

SPCtrlLine *line = NULL;

if (drag->lines) {

for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {

line = (SPCtrlLine*) l->data;

over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) line, NR::Point(event->motion.x, event->motion.y));

}

}

if (over_line) {

sp_gradient_context_add_stop_near_point(rc, SP_ITEM(selection->itemList()->data), rc->mousepoint_doc, 0);

ret = TRUE;

}

} else {

dragging = false;

// unless clicked with Ctrl (to enable Ctrl+doubleclick). (don't what this is for (johan))

if (event->button.state & GDK_CONTROL_MASK) {

ret = TRUE;

break;

}

if (!event_context->within_tolerance) {

// we've been dragging, do nothing (grdrag handles that)

} else if (event_context->item_to_select) {

// no dragging, select clicked item if any

if (event->button.state & GDK_SHIFT_MASK) {

selection->toggle(event_context->item_to_select);

} else {

selection->set(event_context->item_to_select);

}

} else {

// click in an empty space; do the same as Esc

if (drag->selected) {

drag->deselectAll();

} else {

selection->clear();

}

}

event_context->item_to_select = NULL;

ret = TRUE;

}

}

break;

case GDK_KEY_PRESS:

switch (get_group0_keyval (&event->key)) {

case GDK_Alt_L:

case GDK_Alt_R:

case GDK_Control_L:

case GDK_Control_R:

case GDK_Shift_L:

case GDK_Shift_R:

case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)

case GDK_Meta_R:

sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,

_("<b>Ctrl</b>: snap gradient angle"),

_("<b>Shift</b>: draw gradient around the starting point"),

NULL);

break;

case GDK_x:

case GDK_X:

if (MOD__ALT_ONLY) {

desktop->setToolboxFocusTo ("altx-grad");

ret = TRUE;

}

break;

case GDK_Escape:

if (drag->selected) {

drag->deselectAll();

} else {

selection->clear();

}

ret = TRUE;

//TODO: make dragging escapable by Esc

break;

case GDK_Left: // move handle left

case GDK_KP_Left:

case GDK_KP_4:

if (!MOD__CTRL) { // not ctrl

if (MOD__ALT) { // alt

if (MOD__SHIFT) drag->selected_move_screen(-10, 0); // shift

else drag->selected_move_screen(-1, 0); // no shift

}

else { // no alt

if (MOD__SHIFT) drag->selected_move(-10*nudge, 0); // shift

else drag->selected_move(-nudge, 0); // no shift

}

ret = TRUE;

}

break;

case GDK_Up: // move handle up

case GDK_KP_Up:

case GDK_KP_8:

if (!MOD__CTRL) { // not ctrl

if (MOD__ALT) { // alt

if (MOD__SHIFT) drag->selected_move_screen(0, 10); // shift

else drag->selected_move_screen(0, 1); // no shift

}

else { // no alt

if (MOD__SHIFT) drag->selected_move(0, 10*nudge); // shift

else drag->selected_move(0, nudge); // no shift

}

ret = TRUE;

}

break;

case GDK_Right: // move handle right

case GDK_KP_Right:

case GDK_KP_6:

if (!MOD__CTRL) { // not ctrl

if (MOD__ALT) { // alt

if (MOD__SHIFT) drag->selected_move_screen(10, 0); // shift

else drag->selected_move_screen(1, 0); // no shift

}

else { // no alt

if (MOD__SHIFT) drag->selected_move(10*nudge, 0); // shift

else drag->selected_move(nudge, 0); // no shift

}

ret = TRUE;

}

break;

case GDK_Down: // move handle down

case GDK_KP_Down:

case GDK_KP_2:

if (!MOD__CTRL) { // not ctrl

if (MOD__ALT) { // alt

if (MOD__SHIFT) drag->selected_move_screen(0, -10); // shift

else drag->selected_move_screen(0, -1); // no shift

}

else { // no alt

if (MOD__SHIFT) drag->selected_move(0, -10*nudge); // shift

else drag->selected_move(0, -nudge); // no shift

}

ret = TRUE;

}

break;

case GDK_r:

case GDK_R:

if (MOD__SHIFT_ONLY) {

// First try selected dragger

if (drag && drag->selected) {

drag->selected_reverse_vector();

} else { // If no drag or no dragger selected, act on selection (both fill and stroke gradients)

for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {

sp_item_gradient_reverse_vector (SP_ITEM(i->data), true);

sp_item_gradient_reverse_vector (SP_ITEM(i->data), false);

}

}

// we did an undoable action

sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,

_("Invert gradient"));

ret = TRUE;

}

break;

case GDK_Delete:

case GDK_KP_Delete:

case GDK_BackSpace:

if ( drag->selected ) {

drag->deleteSelected(MOD__CTRL_ONLY);

ret = TRUE;

}

break;

default:

break;

}

break;

case GDK_KEY_RELEASE:

switch (get_group0_keyval (&event->key)) {

case GDK_Alt_L:

case GDK_Alt_R:

case GDK_Control_L:

case GDK_Control_R:

case GDK_Shift_L:

case GDK_Shift_R:

case GDK_Meta_L: // Meta is when you press Shift+Alt

case GDK_Meta_R:

event_context->defaultMessageContext()->clear();

break;

default:

break;

}

break;

default:

break;

}

if (!ret) {

if (((SPEventContextClass *) parent_class)->root_handler) {

ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);

}

}

return ret;

}

static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime)

{

SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop;

Inkscape::Selection *selection = sp_desktop_selection(desktop);

SPDocument *document = sp_desktop_document(desktop);

SPEventContext *ec = SP_EVENT_CONTEXT(&rc);

if (!selection->isEmpty()) {

int type = prefs_get_int_attribute ("tools.gradient", "newgradient", 1);

int fill_or_stroke = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);

SPGradient *vector;

if (ec->item_to_select) {

vector = sp_gradient_vector_for_object(document, desktop, ec->item_to_select, fill_or_stroke);

} else {

vector = sp_gradient_vector_for_object(document, desktop, SP_ITEM(selection->itemList()->data), fill_or_stroke);

}

// HACK: reset fill-opacity - that 0.75 is annoying; BUT remove this when we have an opacity slider for all tabs

SPCSSAttr *css = sp_repr_css_attr_new();

sp_repr_css_set_property(css, "fill-opacity", "1.0");

for (GSList const *i = selection->itemList(); i != NULL; i = i->next) {

//FIXME: see above

sp_repr_css_change_recursive(SP_OBJECT_REPR(i->data), css, "style");

sp_item_set_gradient(SP_ITEM(i->data), vector, (SPGradientType) type, fill_or_stroke);

if (type == SP_GRADIENT_TYPE_LINEAR) {

sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_BEGIN, 0, rc.origin, fill_or_stroke, true, false);

sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_END, 0, pt, fill_or_stroke, true, false);

} else if (type == SP_GRADIENT_TYPE_RADIAL) {

sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_CENTER, 0, rc.origin, fill_or_stroke, true, false);

sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_R1, 0, pt, fill_or_stroke, true, false);

}

SP_OBJECT (i->data)->requestModified(SP_OBJECT_MODIFIED_FLAG);

}

if (ec->_grdrag) {

ec->_grdrag->updateDraggers();

// prevent regenerating draggers by selection modified signal, which sometimes

// comes too late and thus destroys the knot which we will now grab:

ec->_grdrag->local_change = true;

// give the grab out-of-bounds values of xp/yp because we're already dragging

// and therefore are already out of tolerance

ec->_grdrag->grabKnot (SP_ITEM(selection->itemList()->data),

type == SP_GRADIENT_TYPE_LINEAR? POINT_LG_END : POINT_RG_R1,

0, //point_i

fill_or_stroke, 99999, 99999, etime);

}

// We did an undoable action, but sp_document_done will be called by the knot when released

// status text; we do not track coords because this branch is run once, not all the time

// during drag

int n_objects = g_slist_length((GSList *) selection->itemList());

rc._message_context->setF(Inkscape::NORMAL_MESSAGE,

ngettext("<b>Gradient</b> for %d object; with <b>Ctrl</b> to snap angle",

"<b>Gradient</b> for %d objects; with <b>Ctrl</b> to snap angle", n_objects),

n_objects);

} else {

sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>objects</b> on which to create gradient."));

}

}