7042N/A#define __SP_GRADIENT_CONTEXT_C__

7042N/A

7042N/A

7042N/A#ifdef HAVE_CONFIG_H

7042N/A# include "config.h"

7042N/A#endif

7042N/A

7042N/A

7042N/A#include <gdk/gdkkeysyms.h>

7042N/A

7042N/A#include "macros.h"

7042N/A#include "document.h"

7042N/A#include "selection.h"

7042N/A#include "desktop.h"

7042N/A#include "desktop-handles.h"

7042N/A#include "message-context.h"

7042N/A#include "message-stack.h"

7042N/A#include "pixmaps/cursor-gradient.xpm"

7042N/A#include "pixmaps/cursor-gradient-add.xpm"

7042N/A#include "gradient-context.h"

7042N/A#include "gradient-chemistry.h"

7042N/A#include <glibmm/i18n.h>

7042N/A#include "prefs-utils.h"

7042N/A#include "gradient-drag.h"

7042N/A#include "gradient-chemistry.h"

7042N/A#include "xml/repr.h"

7042N/A#include "sp-item.h"

7042N/A#include "display/sp-ctrlline.h"

7042N/A#include "sp-linear-gradient.h"

7042N/A#include "sp-radial-gradient.h"

7042N/A#include "sp-stop.h"

7042N/A#include "svg/css-ostringstream.h"

7042N/A#include "svg/svg-color.h"

7042N/A#include "snap.h"

7042N/A#include "sp-namedview.h"

7042N/A#include "rubberband.h"

7042N/A

7042N/A

7042N/A

7042N/Astatic void sp_gradient_context_class_init(SPGradientContextClass *klass);

7042N/Astatic void sp_gradient_context_init(SPGradientContext *gr_context);

7042N/Astatic void sp_gradient_context_dispose(GObject *object);

7042N/A

7042N/Astatic void sp_gradient_context_setup(SPEventContext *ec);

7042N/A

7042N/Astatic gint sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event);

7042N/A

7042N/Astatic void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime);

7042N/A

7042N/Astatic SPEventContextClass *parent_class;

7042N/A

7042N/A

7042N/AGtkType sp_gradient_context_get_type()

7042N/A{

7042N/A static GType type = 0;

7042N/A if (!type) {

7042N/A GTypeInfo info = {

7042N/A sizeof(SPGradientContextClass),

7042N/A NULL, NULL,

7042N/A (GClassInitFunc) sp_gradient_context_class_init,

7042N/A NULL, NULL,

7042N/A sizeof(SPGradientContext),

7042N/A 4,

7042N/A (GInstanceInitFunc) sp_gradient_context_init,

7042N/A NULL, /* value_table */

7042N/A };

7042N/A type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPGradientContext", &info, (GTypeFlags) 0);

7042N/A }

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;

}

rc->selcon->disconnect();

delete rc->selcon;

rc->subselcon->disconnect();

delete rc->subselcon;

G_OBJECT_CLASS(parent_class)->dispose(object);

}

const gchar *gr_handle_descr [] = {

N_("Linear gradient <b>start</b>"), //POINT_LG_BEGIN

N_("Linear gradient <b>end</b>"),

N_("Linear gradient <b>mid stop</b>"),

N_("Radial gradient <b>center</b>"),

N_("Radial gradient <b>radius</b>"),

N_("Radial gradient <b>radius</b>"),

N_("Radial gradient <b>focus</b>"), // POINT_RG_FOCUS

N_("Radial gradient <b>mid stop</b>"),

N_("Radial gradient <b>mid stop</b>")

};

static void

gradient_selection_changed (Inkscape::Selection *, gpointer data)

{

SPGradientContext *rc = (SPGradientContext *) data;

GrDrag *drag = rc->_grdrag;

Inkscape::Selection *selection = sp_desktop_selection(SP_EVENT_CONTEXT(rc)->desktop);

guint n_obj = g_slist_length((GSList *) selection->itemList());

if (!drag->isNonEmpty() || selection->isEmpty())

return;

guint n_tot = drag->numDraggers();

guint n_sel = drag->numSelected();

//The use of ngettext in the following code is intentional even if the English singular form would never be used

if (n_sel == 1) {

if (drag->singleSelectedDraggerNumDraggables() == 1) {

gchar * message = g_strconcat(

//TRANSLATORS: %s will be substituted with the point name (see previous messages); This is part of a compound message

_("%s selected"),

//TRANSLATORS: Mind the space in front. This is part of a compound message

ngettext(" out of %d gradient handle"," out of %d gradient handles",n_tot),

ngettext(" on %d selected object"," on %d selected objects",n_obj),NULL);

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

message,_(gr_handle_descr[drag->singleSelectedDraggerSingleDraggableType()]), n_tot, n_obj);

} else {

gchar * message = g_strconcat(

//TRANSLATORS: This is a part of a compound message (out of two more indicating: grandint handle count & object count)

ngettext("One handle merging %d stop (drag with <b>Shift</b> to separate) selected",

"One handle merging %d stops (drag with <b>Shift</b> to separate) selected",drag->singleSelectedDraggerNumDraggables()),

ngettext(" out of %d gradient handle"," out of %d gradient handles",n_tot),

ngettext(" on %d selected object"," on %d selected objects",n_obj),NULL);

rc->_message_context->setF(Inkscape::NORMAL_MESSAGE,message,drag->singleSelectedDraggerNumDraggables(), n_tot, n_obj);

}

} else if (n_sel > 1) {

//TRANSLATORS: The plural refers to number of selected gradient handles. This is part of a compound message (part two indicates selected object count)

gchar * message = g_strconcat(ngettext("<b>%d</b> gradient handle selected out of %d","<b>%d</b> gradient handles selected out of %d",n_sel),

//TRANSLATORS: Mind the space in front. (Refers to gradient handles selected). This is part of a compound message

ngettext(" on %d selected object"," on %d selected objects",n_obj),NULL);

rc->_message_context->setF(Inkscape::NORMAL_MESSAGE,message, n_sel, n_tot, n_obj);

} else if (n_sel == 0) {

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

//TRANSLATORS: The plural refers to number of selected objects

ngettext("<b>No</b> gradient handles selected out of %d on %d selected object",

"<b>No</b> gradient handles selected out of %d on %d selected objects",n_obj), n_tot, n_obj);

}

}

static void

gradient_subselection_changed (gpointer, gpointer data)

{

gradient_selection_changed (NULL, data);

}

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();

Inkscape::Selection *selection = sp_desktop_selection(ec->desktop);

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

rc->selcon = new sigc::connection (selection->connectChanged( sigc::bind (sigc::ptr_fun(&gradient_selection_changed), rc)));

rc->subselcon = new sigc::connection (ec->desktop->connectToolSubselectionChanged(sigc::bind (sigc::ptr_fun(&gradient_subselection_changed), rc)));

gradient_selection_changed(selection, rc);

}

sp_gradient_context_select_next (SPEventContext *event_context)

{

GrDrag *drag = event_context->_grdrag;

g_assert (drag);

GrDragger *d = drag->select_next();

event_context->desktop->scroll_to_point(d->point, 1.0);

}

sp_gradient_context_select_prev (SPEventContext *event_context)

{

GrDrag *drag = event_context->_grdrag;

g_assert (drag);

GrDragger *d = drag->select_prev();

event_context->desktop->scroll_to_point(d->point, 1.0);

}

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, 0);

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;

}

std::vector<NR::Point>

sp_gradient_context_get_stop_intervals (GrDrag *drag, GSList **these_stops, GSList **next_stops)

{

std::vector<NR::Point> coords;

// for all selected draggers

for (GList *i = drag->selected; i != NULL; i = i->next) {

GrDragger *dragger = (GrDragger *) i->data;

// remember the coord of the dragger to reselect it later

coords.push_back(dragger->point);

// for all draggables of dragger

for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {

GrDraggable *d = (GrDraggable *) j->data;

// find the gradient

SPGradient *gradient = sp_item_gradient (d->item, d->fill_or_stroke);

SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);

// these draggable types cannot have a next draggabe to insert a stop between them

if (d->point_type == POINT_LG_END ||

d->point_type == POINT_RG_FOCUS ||

d->point_type == POINT_RG_R1 ||

d->point_type == POINT_RG_R2) {

continue;

}

// from draggables to stops

SPStop *this_stop = sp_get_stop_i (vector, d->point_i);

SPStop *next_stop = sp_next_stop (this_stop);

SPStop *last_stop = sp_last_stop (vector);

gint fs = d->fill_or_stroke;

SPItem *item = d->item;

gint type = d->point_type;

gint p_i = d->point_i;

// if there's a next stop,

if (next_stop) {

GrDragger *dnext = NULL;

// find its dragger

// (complex because it may have different types, and because in radial,

// more than one dragger may correspond to a stop, so we must distinguish)

if (type == POINT_LG_BEGIN || type == POINT_LG_MID) {

if (next_stop == last_stop)

dnext = drag->getDraggerFor (item, POINT_LG_END, p_i+1, fs);

else

dnext = drag->getDraggerFor (item, POINT_LG_MID, p_i+1, fs);

} else { // radial

if (type == POINT_RG_CENTER || type == POINT_RG_MID1) {

if (next_stop == last_stop)

dnext = drag->getDraggerFor (item, POINT_RG_R1, p_i+1, fs);

else

dnext = drag->getDraggerFor (item, POINT_RG_MID1, p_i+1, fs);

}

if ((type == POINT_RG_MID2) ||

(type == POINT_RG_CENTER && dnext && !dnext->isSelected())) {

if (next_stop == last_stop)

dnext = drag->getDraggerFor (item, POINT_RG_R2, p_i+1, fs);

else

dnext = drag->getDraggerFor (item, POINT_RG_MID2, p_i+1, fs);

}

}

// if both adjacent draggers selected,

if (!g_slist_find(*these_stops, this_stop) && dnext && dnext->isSelected()) {

// remember the coords of the future dragger to select it

coords.push_back(0.5*(dragger->point + dnext->point));

// do not insert a stop now, it will confuse the loop;

// just remember the stops

*these_stops = g_slist_prepend (*these_stops, this_stop);

*next_stops = g_slist_prepend (*next_stops, next_stop);

}

}

}

}

return coords;

}

static void

sp_gradient_context_add_stops_between_selected_stops (SPGradientContext *rc)

{

SPDocument *doc = NULL;

GrDrag *drag = rc->_grdrag;

GSList *these_stops = NULL;

GSList *next_stops = NULL;

std::vector<NR::Point> coords = sp_gradient_context_get_stop_intervals (drag, &these_stops, &next_stops);

if (g_slist_length(these_stops) == 0 && drag->numSelected() == 1) {

// if a single stop is selected, add between that stop and the next one

GrDragger *dragger = (GrDragger *) drag->selected->data;

for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {

GrDraggable *d = (GrDraggable *) j->data;

SPGradient *gradient = sp_item_gradient (d->item, d->fill_or_stroke);

SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);

SPStop *this_stop = sp_get_stop_i (vector, d->point_i);

SPStop *next_stop = sp_next_stop (this_stop);

if (this_stop && next_stop) {

these_stops = g_slist_prepend (these_stops, this_stop);

next_stops = g_slist_prepend (next_stops, next_stop);

}

}

}

// now actually create the new stops

GSList *i = these_stops;

GSList *j = next_stops;

for (; i != NULL && j != NULL; i = i->next, j = j->next) {

SPStop *this_stop = (SPStop *) i->data;

SPStop *next_stop = (SPStop *) j->data;

gfloat offset = 0.5*(this_stop->offset + next_stop->offset);

SPObject *parent = SP_OBJECT_PARENT(this_stop);

if (SP_IS_GRADIENT (parent)) {

doc = SP_OBJECT_DOCUMENT (parent);

sp_vector_add_stop (SP_GRADIENT (parent), this_stop, next_stop, offset);

sp_gradient_ensure_vector (SP_GRADIENT (parent));

}

}

if (g_slist_length(these_stops) > 0 && doc) {

sp_document_done (doc, SP_VERB_CONTEXT_GRADIENT, _("Add gradient stop"));

drag->updateDraggers();

// so that it does not automatically update draggers in idle loop, as this would deselect

drag->local_change = true;

// select all the old selected and new created draggers

drag->selectByCoords(coords);

}

g_slist_free (these_stops);

g_slist_free (next_stops);

}

double sqr(double x) {return x*x;}

static void

sp_gradient_simplify(SPGradientContext *rc, double tolerance)

{

SPDocument *doc = NULL;

GrDrag *drag = rc->_grdrag;

GSList *these_stops = NULL;

GSList *next_stops = NULL;

std::vector<NR::Point> coords = sp_gradient_context_get_stop_intervals (drag, &these_stops, &next_stops);

GSList *todel = NULL;

GSList *i = these_stops;

GSList *j = next_stops;

for (; i != NULL && j != NULL; i = i->next, j = j->next) {

SPStop *stop0 = (SPStop *) i->data;

SPStop *stop1 = (SPStop *) j->data;

gint i1 = g_slist_index(these_stops, stop1);

if (i1 != -1) {

GSList *next_next = g_slist_nth (next_stops, i1);

if (next_next) {

SPStop *stop2 = (SPStop *) next_next->data;

if (g_slist_find(todel, stop0) || g_slist_find(todel, stop2))

continue;

guint32 const c0 = sp_stop_get_rgba32(stop0);

guint32 const c2 = sp_stop_get_rgba32(stop2);

guint32 const c1r = sp_stop_get_rgba32(stop1);

guint32 c1 = average_color (c0, c2,

(stop1->offset - stop0->offset) / (stop2->offset - stop0->offset));

double diff =

sqr(SP_RGBA32_R_F(c1) - SP_RGBA32_R_F(c1r)) +

sqr(SP_RGBA32_G_F(c1) - SP_RGBA32_G_F(c1r)) +

sqr(SP_RGBA32_B_F(c1) - SP_RGBA32_B_F(c1r)) +

sqr(SP_RGBA32_A_F(c1) - SP_RGBA32_A_F(c1r));

if (diff < tolerance)

todel = g_slist_prepend (todel, stop1);

}

}

}

for (i = todel; i != NULL; i = i->next) {

SPStop *stop = (SPStop*) i->data;

doc = SP_OBJECT_DOCUMENT (stop);

Inkscape::XML::Node * parent = SP_OBJECT_REPR(stop)->parent();

parent->removeChild(SP_OBJECT_REPR(stop));

}

if (g_slist_length(todel) > 0) {

sp_document_done (doc, SP_VERB_CONTEXT_GRADIENT, _("Simplify gradient"));

drag->local_change = true;

drag->updateDraggers();

drag->selectByCoords(coords);

}

g_slist_free (todel);

g_slist_free (these_stops);

g_slist_free (next_stops);

}

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;

ec->get_drag()->addStopNearPoint (item, mouse_p, tolerance/desktop->current_zoom());

sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,

_("Add gradient stop"));

ec->get_drag()->updateDraggers();

}

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) {

// we take the first item in selection, because with doubleclick, the first click

// always resets selection to the single object under cursor

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 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;

dragging = true;

Geom::Point button_dt = to_2geom(desktop->w2d(button_w));

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

Inkscape::Rubberband::get(desktop)->start(desktop, from_2geom(button_dt));

} else {

// 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);

/* Snap center to nearest magnetic point */

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

m.setup(desktop);

m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, button_dt);

rc->origin = from_2geom(button_dt);

}

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);

if (Inkscape::Rubberband::get(desktop)->is_started()) {

Inkscape::Rubberband::get(desktop)->move(motion_dt);

event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw around</b> handles to select them"));

} else {

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

}

gobble_motion_events(GDK_BUTTON1_MASK);

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)

break;

}

}

if (over_line && line) {

sp_gradient_context_add_stop_near_point(rc, line->item, rc->mousepoint_doc, 0);

ret = TRUE;

}

} else {

dragging = false;

// unless clicked with Ctrl (to enable Ctrl+doubleclick).

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

ret = TRUE;

break;

}

if (!event_context->within_tolerance) {

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

// or rubberband-select if we have rubberband

Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get(desktop);

if (r->is_started() && !event_context->within_tolerance) {

// this was a rubberband drag

if (r->getMode() == RUBBERBAND_MODE_RECT) {

boost::optional<NR::Rect> const b = r->getRectangle();

drag->selectRect(*b);

}

}

} 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;

}

Inkscape::Rubberband::get(desktop)->stop();

}

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_A:

case GDK_a:

if (MOD__CTRL_ONLY && drag->isNonEmpty()) {

drag->selectAll();

ret = TRUE;

}

break;

case GDK_L:

case GDK_l:

if (MOD__CTRL_ONLY && drag->isNonEmpty() && drag->hasSelection()) {

sp_gradient_simplify(rc, 1e-4);

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

gint mul = 1 + gobble_key_events(

get_group0_keyval(&event->key), 0); // with any mask

if (MOD__ALT) { // alt

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

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

}

else { // no alt

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

else drag->selected_move(mul*-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

gint mul = 1 + gobble_key_events(

get_group0_keyval(&event->key), 0); // with any mask

if (MOD__ALT) { // alt

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

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

}

else { // no alt

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

else drag->selected_move(0, mul*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

gint mul = 1 + gobble_key_events(

get_group0_keyval(&event->key), 0); // with any mask

if (MOD__ALT) { // alt

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

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

}

else { // no alt

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

else drag->selected_move(mul*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

gint mul = 1 + gobble_key_events(

get_group0_keyval(&event->key), 0); // with any mask

if (MOD__ALT) { // alt

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

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

}

else { // no alt

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

else drag->selected_move(0, mul*-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_Insert:

case GDK_KP_Insert:

// with any modifiers:

sp_gradient_context_add_stops_between_selected_stops (rc);

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) {

// pick color from the object where drag started

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

} else {

// Starting from empty space:

// Sort items so that the topmost comes last

GSList *items = g_slist_copy ((GSList *) selection->itemList());

items = g_slist_sort(items, (GCompareFunc) sp_item_repr_compare_position);

// take topmost

vector = sp_gradient_vector_for_object(document, desktop, SP_ITEM(g_slist_last(items)->data), fill_or_stroke);

g_slist_free (items);

}

// 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,

-1, // ignore number (though it is always 1)

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."));

}

}