static void sp_grd_ed_del_stop(GtkWidget */*widget*/, GtkWidget *vb)
{
SPGradient *gradient = static_cast<SPGradient *>(g_object_get_data(G_OBJECT(vb), "gradient"));
SPStop *stop = get_selected_stop(vb);
if (!stop) {
return;
}
if (gradient->vector.stops.size() > 2) { // 2 is the minimum
// if we delete first or last stop, move the next/previous to the edge
if (stop->offset == 0) {
SPStop *next = stop->getNextStop();
if (next) {
next->offset = 0;
sp_repr_set_css_double(next->getRepr(), "offset", 0);
}
} else if (stop->offset == 1) {
SPStop *prev = stop->getPrevStop();
if (prev) {
prev->offset = 1;
sp_repr_set_css_double(prev->getRepr(), "offset", 1);
}
}
gradient->getRepr()->removeChild(stop->getRepr());
sp_gradient_vector_widget_load_gradient(vb, gradient);
update_stop_list(GTK_WIDGET(vb), gradient, NULL);
DocumentUndo::done(gradient->document, SP_VERB_CONTEXT_GRADIENT,
_("Delete gradient stop"));
}
}
static void sp_grd_ed_add_stop(GtkWidget */*widget*/, GtkWidget *vb)
{
SPGradient *gradient = static_cast<SPGradient *>(g_object_get_data(G_OBJECT(vb), "gradient"));
verify_grad(gradient);
SPStop *stop = get_selected_stop(vb);
if (!stop) {
return;
}
Inkscape::XML::Node *new_stop_repr = NULL;
SPStop *next = stop->getNextStop();
if (next == NULL) {
SPStop *prev = stop->getPrevStop();
if (prev != NULL) {
next = stop;
stop = prev;
}
}
if (next != NULL) {
new_stop_repr = stop->getRepr()->duplicate(gradient->getRepr()->document());
gradient->getRepr()->addChild(new_stop_repr, stop->getRepr());
} else {
next = stop;
new_stop_repr = stop->getPrevStop()->getRepr()->duplicate(gradient->getRepr()->document());
gradient->getRepr()->addChild(new_stop_repr, stop->getPrevStop()->getRepr());
}
SPStop *newstop = reinterpret_cast<SPStop *>(gradient->document->getObjectByRepr(new_stop_repr));
newstop->offset = (stop->offset + next->offset) * 0.5 ;
guint32 const c1 = stop->get_rgba32();
guint32 const c2 = next->get_rgba32();
guint32 cnew = sp_average_color(c1, c2);
Inkscape::CSSOStringStream os;
gchar c[64];
sp_svg_write_color(c, sizeof(c), cnew);
gdouble opacity = static_cast<gdouble>(SP_RGBA32_A_F(cnew));
os << "stop-color:" << c << ";stop-opacity:" << opacity <<";";
newstop->getRepr()->setAttribute("style", os.str().c_str());
sp_repr_set_css_double( newstop->getRepr(), "offset", (double)newstop->offset);
sp_gradient_vector_widget_load_gradient(vb, gradient);
Inkscape::GC::release(new_stop_repr);
update_stop_list(GTK_WIDGET(vb), gradient, newstop);
GtkWidget *offspin = GTK_WIDGET(g_object_get_data(G_OBJECT(vb), "offspn"));
GtkWidget *offslide =GTK_WIDGET(g_object_get_data(G_OBJECT(vb), "offslide"));
gtk_widget_set_sensitive(offslide, TRUE);
gtk_widget_set_sensitive(GTK_WIDGET(offspin), TRUE);
DocumentUndo::done(gradient->document, SP_VERB_CONTEXT_GRADIENT,
_("Add gradient stop"));
}
/**
* return true if this gradient is "equivalent" to that gradient.
* Equivalent meaning they have the same stop count, same stop colors and same stop opacity
* @param that - A gradient to compare this to
*/
bool SPGradient::isEquivalent(SPGradient *that)
{
//TODO Make this work for mesh gradients
bool status = false;
while(1){ // not really a loop, used to avoid deep nesting or multiple exit points from function
if (this->getStopCount() != that->getStopCount()) { break; }
if (this->hasStops() != that->hasStops()) { break; }
if (!this->getVector() || !that->getVector()) { break; }
if (this->isSwatch() != that->isSwatch()) { break; }
if ( this->isSwatch() ){
// drop down to check stops.
}
else if (
(SP_IS_LINEARGRADIENT(this) && SP_IS_LINEARGRADIENT(that)) ||
(SP_IS_RADIALGRADIENT(this) && SP_IS_RADIALGRADIENT(that)) ||
(SP_IS_MESH(this) && SP_IS_MESH(that))) {
if(!this->isAligned(that))break;
}
else { break; } // this should never happen, some unhandled type of gradient
SPStop *as = this->getVector()->getFirstStop();
SPStop *bs = that->getVector()->getFirstStop();
bool effective = true;
while (effective && (as && bs)) {
if (!as->getEffectiveColor().isClose(bs->getEffectiveColor(), 0.001) ||
as->offset != bs->offset) {
effective = false;
break;
}
else {
as = as->getNextStop();
bs = bs->getNextStop();
}
}
if (!effective) break;
status = true;
break;
}
return status;
}
int SPGradient::getStopCount() const
{
int count = 0;
for (SPStop *stop = const_cast<SPGradient*>(this)->getFirstStop(); stop && stop->getNextStop(); stop = stop->getNextStop()) {
count++;
}
return count;
}
// user selected existing stop from list
static void sp_grad_edit_combo_box_changed (GtkComboBox * /*widget*/, GtkWidget *tbl)
{
SPStop *stop = get_selected_stop(tbl);
if (!stop) {
return;
}
blocked = TRUE;
SelectedColor *csel = static_cast<SelectedColor*>(g_object_get_data(G_OBJECT(tbl), "cselector"));
// set its color, from the stored array
g_object_set_data(G_OBJECT(tbl), "updating_color", reinterpret_cast<void*>(1));
csel->setColorAlpha(stop->getEffectiveColor(), stop->opacity);
g_object_set_data(G_OBJECT(tbl), "updating_color", reinterpret_cast<void*>(0));
GtkWidget *offspin = GTK_WIDGET(g_object_get_data(G_OBJECT(tbl), "offspn"));
GtkWidget *offslide =GTK_WIDGET(g_object_get_data(G_OBJECT(tbl), "offslide"));
GtkAdjustment *adj = static_cast<GtkAdjustment*>(g_object_get_data(G_OBJECT(tbl), "offset"));
bool isEndStop = false;
SPStop *prev = NULL;
prev = stop->getPrevStop();
if (prev != NULL ) {
gtk_adjustment_set_lower (adj, prev->offset);
} else {
isEndStop = true;
gtk_adjustment_set_lower (adj, 0);
}
SPStop *next = NULL;
next = stop->getNextStop();
if (next != NULL ) {
gtk_adjustment_set_upper (adj, next->offset);
} else {
isEndStop = true;
gtk_adjustment_set_upper (adj, 1.0);
}
//fixme: does this work on all possible input gradients?
if (!isEndStop) {
gtk_widget_set_sensitive(offslide, TRUE);
gtk_widget_set_sensitive(GTK_WIDGET(offspin), TRUE);
} else {
gtk_widget_set_sensitive(offslide, FALSE);
gtk_widget_set_sensitive(GTK_WIDGET(offspin), FALSE);
}
gtk_adjustment_set_value(adj, stop->offset);
gtk_adjustment_changed(adj);
blocked = FALSE;
}
static void gr_stop_set_offset(GtkComboBox * /*widget*/, GtkWidget *data)
{
SPStop *stop = get_selected_stop(data);
if (!stop) {
return;
}
EgeAdjustmentAction* act = (EgeAdjustmentAction *)g_object_get_data( G_OBJECT(data), "offset_action");
if (!act) {
return;
}
GtkAdjustment *adj = ege_adjustment_action_get_adjustment(act);
bool isEndStop = false;
SPStop *prev = NULL;
prev = stop->getPrevStop();
if (prev != NULL ) {
gtk_adjustment_set_lower(adj, prev->offset);
} else {
isEndStop = true;
gtk_adjustment_set_lower(adj, 0);
}
SPStop *next = NULL;
next = stop->getNextStop();
if (next != NULL ) {
gtk_adjustment_set_upper(adj, next->offset);
} else {
isEndStop = true;
gtk_adjustment_set_upper(adj, 1.0);
}
blocked = TRUE;
gtk_adjustment_set_value(adj, stop->offset);
gtk_action_set_sensitive( GTK_ACTION(act), !isEndStop );
gtk_adjustment_changed(adj);
blocked = FALSE;
}