#define __GRADIENT_DRAG_C__ /* * On-canvas gradient dragging * * Authors: * bulia byak * Johan Engelen * * Copyright (C) 2007 Johan Engelen * Copyright (C) 2005 Authors * * Released under GNU GPL, read the file 'COPYING' for more information */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "desktop-handles.h" #include "selection.h" #include "desktop.h" #include "desktop-style.h" #include "document.h" #include "display/sp-ctrlline.h" #include "xml/repr.h" #include "svg/css-ostringstream.h" #include "svg/svg.h" #include "prefs-utils.h" #include "sp-item.h" #include "style.h" #include "knot.h" #include "sp-linear-gradient.h" #include "sp-radial-gradient.h" #include "gradient-chemistry.h" #include "gradient-drag.h" #include "sp-stop.h" #include "snap.h" #include "sp-namedview.h" #define GR_KNOT_COLOR_NORMAL 0xffffff00 #define GR_KNOT_COLOR_SELECTED 0x0000ff00 #define GR_LINE_COLOR_FILL 0x0000ff7f #define GR_LINE_COLOR_STROKE 0x9999007f // screen pixels between knots when they snap: #define SNAP_DIST 5 // absolute distance between gradient points for them to become a single dragger when the drag is created: #define MERGE_DIST 0.1 // knot shapes corresponding to GrPointType enum SPKnotShapeType gr_knot_shapes [] = { SP_KNOT_SHAPE_SQUARE, //POINT_LG_BEGIN SP_KNOT_SHAPE_CIRCLE, //POINT_LG_END SP_KNOT_SHAPE_DIAMOND, //POINT_LG_MID SP_KNOT_SHAPE_SQUARE, // POINT_RG_CENTER SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R1 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R2 SP_KNOT_SHAPE_CROSS, // POINT_RG_FOCUS SP_KNOT_SHAPE_DIAMOND, //POINT_RG_MID1 SP_KNOT_SHAPE_DIAMOND //POINT_RG_MID2 }; const gchar *gr_knot_descr [] = { N_("Linear gradient start"), //POINT_LG_BEGIN N_("Linear gradient end"), N_("Linear gradient midstop"), N_("Radial gradient center"), N_("Radial gradient radius"), N_("Radial gradient radius"), N_("Radial gradient focus"), // POINT_RG_FOCUS N_("Linear gradient midstop"), N_("Linear gradient midstop") }; static void gr_drag_sel_changed(Inkscape::Selection *selection, gpointer data) { GrDrag *drag = (GrDrag *) data; drag->updateDraggers (); drag->updateLines (); drag->updateLevels (); } static void gr_drag_sel_modified (Inkscape::Selection *selection, guint flags, gpointer data) { GrDrag *drag = (GrDrag *) data; if (drag->local_change) { drag->local_change = false; } else { drag->updateDraggers (); } drag->updateLines (); drag->updateLevels (); } /** When a _query_style_signal is received, check that \a property requests fill/stroke/opacity (otherwise skip), and fill the \a style with the averaged color of all draggables of the selected dragger, if any. */ int gr_drag_style_query (SPStyle *style, int property, gpointer data) { GrDrag *drag = (GrDrag *) data; if (property != QUERY_STYLE_PROPERTY_FILL && property != QUERY_STYLE_PROPERTY_STROKE && property != QUERY_STYLE_PROPERTY_MASTEROPACITY) { return QUERY_STYLE_NOTHING; } if (!drag->selected) { return QUERY_STYLE_NOTHING; } else { int ret = QUERY_STYLE_NOTHING; float cf[4]; cf[0] = cf[1] = cf[2] = cf[3] = 0; int count = 0; for (GSList const* i = ((GrDragger*)drag->selected->data)->draggables; i != NULL; i = i->next) { // for all draggables of dragger GrDraggable *draggable = (GrDraggable *) i->data; if (ret == QUERY_STYLE_NOTHING) { ret = QUERY_STYLE_SINGLE; } else if (ret == QUERY_STYLE_SINGLE) { ret = QUERY_STYLE_MULTIPLE_AVERAGED; } guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke); cf[0] += SP_RGBA32_R_F (c); cf[1] += SP_RGBA32_G_F (c); cf[2] += SP_RGBA32_B_F (c); cf[3] += SP_RGBA32_A_F (c); count ++; } if (count) { cf[0] /= count; cf[1] /= count; cf[2] /= count; cf[3] /= count; // set both fill and stroke with our stop-color and stop-opacity sp_color_set_rgb_float((SPColor *) &style->fill.value.color, cf[0], cf[1], cf[2]); style->fill.set = TRUE; style->fill.type = SP_PAINT_TYPE_COLOR; sp_color_set_rgb_float((SPColor *) &style->stroke.value.color, cf[0], cf[1], cf[2]); style->stroke.set = TRUE; style->stroke.type = SP_PAINT_TYPE_COLOR; style->fill_opacity.value = SP_SCALE24_FROM_FLOAT (1.0); style->fill_opacity.set = TRUE; style->stroke_opacity.value = SP_SCALE24_FROM_FLOAT (1.0); style->stroke_opacity.set = TRUE; style->opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]); style->opacity.set = TRUE; } return ret; } } bool gr_drag_style_set (const SPCSSAttr *css, gpointer data) { GrDrag *drag = (GrDrag *) data; if (!drag->selected) return false; SPCSSAttr *stop = sp_repr_css_attr_new (); // See if the css contains interesting properties, and if so, translate them into the format // acceptable for gradient stops // any of color properties, in order of increasing priority: if (css->attribute("flood-color")) sp_repr_css_set_property (stop, "stop-color", css->attribute("flood-color")); if (css->attribute("lighting-color")) sp_repr_css_set_property (stop, "stop-color", css->attribute("lighting-color")); if (css->attribute("color")) sp_repr_css_set_property (stop, "stop-color", css->attribute("color")); if (css->attribute("stroke") && strcmp(css->attribute("stroke"), "none")) sp_repr_css_set_property (stop, "stop-color", css->attribute("stroke")); if (css->attribute("fill") && strcmp(css->attribute("fill"), "none")) sp_repr_css_set_property (stop, "stop-color", css->attribute("fill")); if (css->attribute("stop-color")) sp_repr_css_set_property (stop, "stop-color", css->attribute("stop-color")); if (css->attribute("stop-opacity")) { // direct setting of stop-opacity has priority sp_repr_css_set_property (stop, "stop-opacity", css->attribute("stop-opacity")); } else { // multiply all opacity properties: gdouble accumulated = 1.0; accumulated *= sp_svg_read_percentage(css->attribute("flood-opacity"), 1.0); accumulated *= sp_svg_read_percentage(css->attribute("opacity"), 1.0); accumulated *= sp_svg_read_percentage(css->attribute("stroke-opacity"), 1.0); accumulated *= sp_svg_read_percentage(css->attribute("fill-opacity"), 1.0); Inkscape::CSSOStringStream os; os << accumulated; sp_repr_css_set_property (stop, "stop-opacity", os.str().c_str()); if ((css->attribute("fill") && !strcmp(css->attribute("fill"), "none")) || (css->attribute("stroke") && !strcmp(css->attribute("stroke"), "none"))) sp_repr_css_set_property (stop, "stop-opacity", "0"); // if set to none, don't change color, set opacity to 0 } if (!stop->attributeList()) { // nothing for us here, pass it on sp_repr_css_attr_unref(stop); return false; } for (GList const* sel = drag->selected; sel != NULL; sel = sel->next) { // for all selected draggers GrDragger* dragger = (GrDragger*) sel->data; for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger GrDraggable *draggable = (GrDraggable *) i->data; drag->local_change = true; sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop); } } //sp_repr_css_print(stop); sp_repr_css_attr_unref(stop); return true; } GrDrag::GrDrag(SPDesktop *desktop) { this->desktop = desktop; this->selection = sp_desktop_selection(desktop); this->draggers = NULL; this->lines = NULL; this->selected = NULL; this->hor_levels.clear(); this->vert_levels.clear(); this->local_change = false; this->sel_changed_connection = this->selection->connectChanged( sigc::bind ( sigc::ptr_fun(&gr_drag_sel_changed), (gpointer)this ) ); this->sel_modified_connection = this->selection->connectModified( sigc::bind( sigc::ptr_fun(&gr_drag_sel_modified), (gpointer)this ) ); this->style_set_connection = this->desktop->connectSetStyle( sigc::bind( sigc::ptr_fun(&gr_drag_style_set), (gpointer)this ) ); this->style_query_connection = this->desktop->connectQueryStyle( sigc::bind( sigc::ptr_fun(&gr_drag_style_query), (gpointer)this ) ); this->updateDraggers (); this->updateLines (); this->updateLevels (); if (desktop->gr_item) { this->setSelected (getDraggerFor (desktop->gr_item, desktop->gr_point_type, desktop->gr_point_i, desktop->gr_fill_or_stroke)); } } GrDrag::~GrDrag() { this->sel_changed_connection.disconnect(); this->sel_modified_connection.disconnect(); this->style_set_connection.disconnect(); this->style_query_connection.disconnect(); if (this->selected) { GrDraggable *draggable = (GrDraggable *) ((GrDragger*)this->selected->data)->draggables->data; desktop->gr_item = draggable->item; desktop->gr_point_type = draggable->point_type; desktop->gr_point_i = draggable->point_i; desktop->gr_fill_or_stroke = draggable->fill_or_stroke; } else { desktop->gr_item = NULL; desktop->gr_point_type = 0; desktop->gr_point_i = 0; desktop->gr_fill_or_stroke = true; } deselect_all(); for (GList *l = this->draggers; l != NULL; l = l->next) { delete ((GrDragger *) l->data); } g_list_free (this->draggers); this->draggers = NULL; this->selected = NULL; for (GSList *l = this->lines; l != NULL; l = l->next) { gtk_object_destroy( GTK_OBJECT (l->data)); } g_slist_free (this->lines); this->lines = NULL; } GrDraggable::GrDraggable (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke) { this->item = item; this->point_type = point_type; this->point_i = point_i; this->fill_or_stroke = fill_or_stroke; g_object_ref (G_OBJECT (this->item)); } GrDraggable::~GrDraggable () { g_object_unref (G_OBJECT (this->item)); } // FIXME: make global function in libnr or somewhere. static NR::Point * get_snap_vector (NR::Point p, NR::Point o, double snap, double initial) { double r = NR::L2 (p - o); if (r < 1e-3) return NULL; double angle = NR::atan2 (p - o); // snap angle to snaps increments, starting from initial: double a_snapped = initial + floor((angle - initial)/snap + 0.5) * snap; // calculate the new position and subtract p to get the vector: return new NR::Point (o + r * NR::Point(cos(a_snapped), sin(a_snapped)) - p); } // FIXME: make global function in libnr or somewhere. static NR::Point snap_vector_midpoint (NR::Point p, NR::Point begin, NR::Point end, double snap) { 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; double snapdist = length * snap; double r_snapped = (snap==0) ? r : floor(r/(snapdist + 0.5)) * snapdist; return (begin + r_snapped * be); } static void gr_knot_moved_handler(SPKnot *knot, NR::Point const *ppointer, guint state, gpointer data) { GrDragger *dragger = (GrDragger *) data; GrDrag *drag = dragger->parent; NR::Point p = *ppointer; // FIXME: take from prefs double snap_dist = SNAP_DIST / dragger->parent->desktop->current_zoom(); if (state & GDK_SHIFT_MASK) { // with Shift; unsnap if we carry more than one draggable if (dragger->draggables && dragger->draggables->next) { // create a new dragger GrDragger *dr_new = new GrDragger (dragger->parent, dragger->point, NULL); dragger->parent->draggers = g_list_prepend (dragger->parent->draggers, dr_new); // relink to it all but the first draggable in the list for (GSList const* i = dragger->draggables->next; i != NULL; i = i->next) { GrDraggable *draggable = (GrDraggable *) i->data; dr_new->addDraggable (draggable); } dr_new->updateKnotShape(); g_slist_free (dragger->draggables->next); dragger->draggables->next = NULL; dragger->updateKnotShape(); dragger->updateTip(); } } else if (!(state & GDK_CONTROL_MASK)) { // without Shift or Ctrl; see if we need to snap to another dragger for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) { GrDragger *d_new = (GrDragger *) di->data; if (dragger->mayMerge(d_new) && NR::L2 (d_new->point - p) < snap_dist) { // Merge draggers: for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger GrDraggable *draggable = (GrDraggable *) i->data; // copy draggable to d_new: GrDraggable *da_new = new GrDraggable (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke); d_new->addDraggable (da_new); } // unlink and delete this dragger dragger->parent->draggers = g_list_remove (dragger->parent->draggers, dragger); delete dragger; // update the new merged dragger d_new->fireDraggables(true, false, true); d_new->parent->updateLines(); d_new->parent->setSelected (d_new); d_new->updateKnotShape (); d_new->updateTip (); d_new->updateDependencies(true); sp_document_done (sp_desktop_document (d_new->parent->desktop), SP_VERB_CONTEXT_GRADIENT, _("Merge gradient handles")); return; } } } if (!((state & GDK_SHIFT_MASK) || ((state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK)))) { // Try snapping to the grid or guides SnapManager const &m = dragger->parent->desktop->namedview->snap_manager; Inkscape::SnappedPoint s = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, p, NULL); if (s.getDistance() < 1e6) { p = s.getPoint(); sp_knot_moveto (knot, &p); } else { // No snapping so far, let's see if we need to snap to any of the levels for (guint i = 0; i < dragger->parent->hor_levels.size(); i++) { if (fabs(p[NR::Y] - dragger->parent->hor_levels[i]) < snap_dist) { p[NR::Y] = dragger->parent->hor_levels[i]; sp_knot_moveto (knot, &p); } } for (guint i = 0; i < dragger->parent->vert_levels.size(); i++) { if (fabs(p[NR::X] - dragger->parent->vert_levels[i]) < snap_dist) { p[NR::X] = dragger->parent->vert_levels[i]; sp_knot_moveto (knot, &p); } } } } if (state & GDK_CONTROL_MASK) { unsigned snaps = abs(prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12)); /* 0 means no snapping. */ // This list will store snap vectors from all draggables of dragger GSList *snap_vectors = NULL; for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { GrDraggable *draggable = (GrDraggable *) i->data; NR::Point *dr_snap = NULL; if (draggable->point_type == POINT_LG_BEGIN || draggable->point_type == POINT_LG_END) { for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) { GrDragger *d_new = (GrDragger *) di->data; if (d_new == dragger) continue; if (d_new->isA (draggable->item, draggable->point_type == POINT_LG_BEGIN? POINT_LG_END : POINT_LG_BEGIN, draggable->point_i, draggable->fill_or_stroke)) { // found the other end of the linear gradient; if (state & GDK_SHIFT_MASK) { // moving linear around center NR::Point center = NR::Point (0.5*(d_new->point + dragger->point)); dr_snap = ¢er; } else { // moving linear around the other end dr_snap = &d_new->point; } } } } else if (draggable->point_type == POINT_RG_R1 || draggable->point_type == POINT_RG_R2 || draggable->point_type == POINT_RG_FOCUS) { for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) { GrDragger *d_new = (GrDragger *) di->data; if (d_new == dragger) continue; if (d_new->isA (draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke)) { // found the center of the radial gradient; dr_snap = &(d_new->point); } } } else if (draggable->point_type == POINT_RG_CENTER) { // radial center snaps to hor/vert relative to its original position dr_snap = &(dragger->point_original); } NR::Point *snap_vector = NULL; if (dr_snap) { if (state & GDK_MOD1_MASK) { // with Alt, snap to the original angle and its perpendiculars snap_vector = get_snap_vector (p, *dr_snap, M_PI/2, NR::atan2 (dragger->point_original - *dr_snap)); } else { // with Ctrl, snap to M_PI/snaps snap_vector = get_snap_vector (p, *dr_snap, M_PI/snaps, 0); } } if (snap_vector) { snap_vectors = g_slist_prepend (snap_vectors, snap_vector); } } // Move by the smallest of snap vectors: NR::Point move(9999, 9999); for (GSList const *i = snap_vectors; i != NULL; i = i->next) { NR::Point *snap_vector = (NR::Point *) i->data; if (NR::L2(*snap_vector) < NR::L2(move)) move = *snap_vector; } if (move[NR::X] < 9999) { p += move; sp_knot_moveto (knot, &p); } g_slist_free(snap_vectors); } dragger->point = p; if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) { dragger->fireDraggables (false, true); } else { dragger->fireDraggables (false); } dragger->updateDependencies(false); drag->keep_selection = (bool) g_list_find(drag->selected, dragger); } /** Called when a midpoint knot is dragged. */ static void gr_knot_moved_midpoint_handler(SPKnot *knot, NR::Point const *ppointer, guint state, gpointer data) { GrDragger *dragger = (GrDragger *) data; GrDrag *drag = dragger->parent; // a midpoint dragger can (logically) only contain one GrDraggable GrDraggable *draggable = (GrDraggable *) dragger->draggables->data; // FIXME: take from prefs double snap_fraction = 0.1; NR::Point p = *ppointer; NR::Point begin(0,0), end(0,0); SPObject *server; if (draggable->fill_or_stroke) server = SP_OBJECT_STYLE_FILL_SERVER (draggable->item); else server = SP_OBJECT_STYLE_STROKE_SERVER (draggable->item); // get begin and end points between which dragging is allowed: // the draglimits are between knot(lowest_i - 1) and knot(highest_i + 1) GSList *moving = NULL; moving = g_slist_append(moving, dragger); guint lowest_i = draggable->point_i; guint highest_i = draggable->point_i; GrDragger *lowest_dragger = dragger; GrDragger *highest_dragger = dragger; bool is_selected = g_list_find(drag->selected, dragger); if (is_selected) { GrDragger* d_add; while ( true ) { d_add = drag->getDraggerFor(draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke); if ( d_add && g_list_find(drag->selected, d_add) ) { lowest_i = lowest_i - 1; moving = g_slist_prepend(moving, d_add); lowest_dragger = d_add; } else { break; } } while ( true ) { d_add = drag->getDraggerFor(draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke); if ( d_add && g_list_find(drag->selected, d_add) ) { highest_i = highest_i + 1; moving = g_slist_append(moving, d_add); highest_dragger = d_add; } else { break; } } } if ( SP_IS_LINEARGRADIENT(server) ) { GrDragger *d_temp; if (lowest_i == 1) { d_temp = drag->getDraggerFor (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke); } else { d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, lowest_i - 1, draggable->fill_or_stroke); } if (d_temp) begin = d_temp->point; d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, highest_i + 1, draggable->fill_or_stroke); if (d_temp == NULL) { d_temp = drag->getDraggerFor (draggable->item, POINT_LG_END, 0, draggable->fill_or_stroke); } if (d_temp) end = d_temp->point; } else if ( SP_IS_RADIALGRADIENT(server) ) { GrDragger *d_temp; if (lowest_i == 1) { d_temp = drag->getDraggerFor (draggable->item, POINT_RG_CENTER, 0, draggable->fill_or_stroke); } else { d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke); } if (d_temp) begin = d_temp->point; d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke); if (d_temp == NULL) { d_temp = drag->getDraggerFor (draggable->item, (draggable->point_type==POINT_RG_MID1) ? POINT_RG_R1 : POINT_RG_R2, 0, draggable->fill_or_stroke); } if (d_temp) end = d_temp->point; } NR::Point low_lim = dragger->point - (lowest_dragger->point - begin); NR::Point high_lim = dragger->point - (highest_dragger->point - end); if (state & GDK_CONTROL_MASK) { p = snap_vector_midpoint (p, low_lim, high_lim, snap_fraction); } else { p = snap_vector_midpoint (p, low_lim, high_lim, 0); } NR::Point displacement = p - dragger->point; for (GSList const* i = moving; i != NULL; i = i->next) { GrDragger *drg = (GrDragger*) i->data; SPKnot *drgknot = drg->knot; drg->point += displacement; sp_knot_moveto (drgknot, & drg->point); drg->fireDraggables (false); drg->updateDependencies(false); } drag->keep_selection = is_selected; } static void gr_knot_grabbed_handler (SPKnot *knot, unsigned int state, gpointer data) { GrDragger *dragger = (GrDragger *) data; sp_canvas_force_full_redraw_after_interruptions(dragger->parent->desktop->canvas, 5); } /** Called when the mouse releases a dragger knot; changes gradient writing to repr, updates other draggers if needed */ static void gr_knot_ungrabbed_handler (SPKnot *knot, unsigned int state, gpointer data) { GrDragger *dragger = (GrDragger *) data; sp_canvas_end_forced_full_redraws(dragger->parent->desktop->canvas); dragger->point_original = dragger->point = knot->pos; if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) { dragger->fireDraggables (true, true); } else { dragger->fireDraggables (true); } // make this dragger selected if (!dragger->parent->keep_selection) { dragger->parent->setSelected (dragger); } dragger->parent->keep_selection = false; dragger->updateDependencies(true); // we did an undoable action sp_document_done (sp_desktop_document (dragger->parent->desktop), SP_VERB_CONTEXT_GRADIENT, _("Move gradient handle")); } /** Called when a dragger knot is clicked; selects the dragger or deletes it depending on the state of the keyboard keys */ static void gr_knot_clicked_handler(SPKnot *knot, guint state, gpointer data) { GrDragger *dragger = (GrDragger *) data; GrDraggable *draggable = (GrDraggable *) dragger->draggables->data; if (!draggable) return; if ( (state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK ) ) { // delete this knot from vector SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke); gradient = sp_gradient_get_vector (gradient, false); if (gradient->vector.stops.size() > 2) { // 2 is the minimum SPStop *stop = NULL; switch (draggable->point_type) { // if we delete first or last stop, move the next/previous to the edge case POINT_LG_BEGIN: case POINT_RG_CENTER: stop = sp_first_stop(gradient); { SPStop *next = sp_next_stop (stop); if (next) { next->offset = 0; sp_repr_set_css_double (SP_OBJECT_REPR (next), "offset", 0); } } break; case POINT_LG_END: case POINT_RG_R1: case POINT_RG_R2: stop = sp_last_stop(gradient); { SPStop *prev = sp_prev_stop (stop, gradient); if (prev) { prev->offset = 1; sp_repr_set_css_double (SP_OBJECT_REPR (prev), "offset", 1); } } break; case POINT_LG_MID: case POINT_RG_MID1: case POINT_RG_MID2: stop = sp_get_stop_i(gradient, draggable->point_i); break; } SP_OBJECT_REPR(gradient)->removeChild(SP_OBJECT_REPR(stop)); sp_document_done (SP_OBJECT_DOCUMENT (gradient), SP_VERB_CONTEXT_GRADIENT, _("Delete gradient stop")); } } else { // select the dragger dragger->point_original = dragger->point; if ( state & GDK_SHIFT_MASK ) { dragger->parent->setSelected (dragger, true, false); } else { dragger->parent->setSelected (dragger); } } } /** Called when a dragger knot is doubleclicked; opens gradient editor with the stop from the first draggable */ static void gr_knot_doubleclicked_handler (SPKnot *knot, guint state, gpointer data) { GrDragger *dragger = (GrDragger *) data; dragger->point_original = dragger->point; if (dragger->draggables == NULL) return; GrDraggable *draggable = (GrDraggable *) dragger->draggables->data; sp_item_gradient_edit_stop (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke); } /** Act upon all draggables of the dragger, setting them to the dragger's point */ void GrDragger::fireDraggables (bool write_repr, bool scale_radial, bool merging_focus) { for (GSList const* i = this->draggables; i != NULL; i = i->next) { GrDraggable *draggable = (GrDraggable *) i->data; // set local_change flag so that selection_changed callback does not regenerate draggers this->parent->local_change = true; // change gradient, optionally writing to repr; prevent focus from moving if it's snapped // to the center, unless it's the first update upon merge when we must snap it to the point if (merging_focus || !(draggable->point_type == POINT_RG_FOCUS && this->isA(draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke))) { sp_item_gradient_set_coords (draggable->item, draggable->point_type, draggable->point_i, this->point, draggable->fill_or_stroke, write_repr, scale_radial); } } } /** Checks if the dragger has a draggable with this point_type */ bool GrDragger::isA (guint point_type) { for (GSList const* i = this->draggables; i != NULL; i = i->next) { GrDraggable *draggable = (GrDraggable *) i->data; if (draggable->point_type == point_type) { return true; } } return false; } /** Checks if the dragger has a draggable with this item, point_type, fill_or_stroke */ bool GrDragger::isA (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke) { for (GSList const* i = this->draggables; i != NULL; i = i->next) { GrDraggable *draggable = (GrDraggable *) i->data; if ( (draggable->point_type == point_type) && (draggable->point_i == point_i) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) { return true; } } return false; } bool GrDraggable::mayMerge (GrDraggable *da2) { if ((this->item == da2->item) && (this->fill_or_stroke == da2->fill_or_stroke)) { // we must not merge the points of the same gradient! if (!((this->point_type == POINT_RG_FOCUS && da2->point_type == POINT_RG_CENTER) || (this->point_type == POINT_RG_CENTER && da2->point_type == POINT_RG_FOCUS))) { // except that we can snap center and focus together return false; } } // disable merging of midpoints. if ( (this->point_type == POINT_LG_MID) || (da2->point_type == POINT_LG_MID) || (this->point_type == POINT_RG_MID1) || (da2->point_type == POINT_RG_MID1) || (this->point_type == POINT_RG_MID2) || (da2->point_type == POINT_RG_MID2) ) return false; return true; } bool GrDragger::mayMerge (GrDragger *other) { if (this == other) return false; for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this GrDraggable *da1 = (GrDraggable *) i->data; for (GSList const* j = other->draggables; j != NULL; j = j->next) { // for all draggables of other GrDraggable *da2 = (GrDraggable *) j->data; if (!da1->mayMerge(da2)) return false; } } return true; } bool GrDragger::mayMerge (GrDraggable *da2) { for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this GrDraggable *da1 = (GrDraggable *) i->data; if (!da1->mayMerge(da2)) return false; } return true; } /** Updates the statusbar tip of the dragger knot, based on its draggables */ void GrDragger::updateTip () { if (this->knot && this->knot->tip) { g_free (this->knot->tip); this->knot->tip = NULL; } if (g_slist_length (this->draggables) == 1) { GrDraggable *draggable = (GrDraggable *) this->draggables->data; char *item_desc = sp_item_description(draggable->item); switch (draggable->point_type) { case POINT_LG_MID: case POINT_RG_MID1: case POINT_RG_MID2: this->knot->tip = g_strdup_printf (_("%s %d for: %s%s; drag with Ctrl to snap offset; click with Ctrl+Alt to delete stop"), _(gr_knot_descr[draggable->point_type]), draggable->point_i, item_desc, draggable->fill_or_stroke == false ? _(" (stroke)") : ""); break; default: this->knot->tip = g_strdup_printf (_("%s for: %s%s; drag with Ctrl to snap angle, with Ctrl+Alt to preserve angle, with Ctrl+Shift to scale around center"), _(gr_knot_descr[draggable->point_type]), item_desc, draggable->fill_or_stroke == false ? _(" (stroke)") : ""); break; } g_free(item_desc); } else if (g_slist_length (draggables) == 2 && isA (POINT_RG_CENTER) && isA (POINT_RG_FOCUS)) { this->knot->tip = g_strdup_printf (_("Radial gradient center and focus; drag with Shift to separate focus")); } else { int length = g_slist_length (this->draggables); this->knot->tip = g_strdup_printf (ngettext("Gradient point shared by %d gradient; drag with Shift to separate", "Gradient point shared by %d gradients; drag with Shift to separate", length), length); } } /** Adds a draggable to the dragger */ void GrDragger::updateKnotShape () { if (!draggables) return; GrDraggable *last = (GrDraggable *) g_slist_last(draggables)->data; g_object_set (G_OBJECT (this->knot->item), "shape", gr_knot_shapes[last->point_type], NULL); } /** Adds a draggable to the dragger */ void GrDragger::addDraggable (GrDraggable *draggable) { this->draggables = g_slist_prepend (this->draggables, draggable); this->updateTip(); } /** Moves this dragger to the point of the given draggable, acting upon all other draggables */ void GrDragger::moveThisToDraggable (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke, bool write_repr) { this->point = sp_item_gradient_get_coords (item, point_type, point_i, fill_or_stroke); this->point_original = this->point; sp_knot_moveto (this->knot, &(this->point)); for (GSList const* i = this->draggables; i != NULL; i = i->next) { GrDraggable *da = (GrDraggable *) i->data; if ( (da->item == item) && (da->point_type == point_type) && (da->point_i == point_i) && (da->fill_or_stroke == fill_or_stroke) ) { continue; } sp_item_gradient_set_coords (da->item, da->point_type, da->point_i, this->point, da->fill_or_stroke, write_repr, false); } // FIXME: here we should also call this->updateDependencies(write_repr); to propagate updating, but how to prevent loops? } /** Moves all midstop draggables that depend on this one */ void GrDragger::updateMidstopDependencies (GrDraggable *draggable, bool write_repr) { SPObject *server; if (draggable->fill_or_stroke) server = SP_OBJECT_STYLE_FILL_SERVER (draggable->item); else server = SP_OBJECT_STYLE_STROKE_SERVER (draggable->item); guint num = SP_GRADIENT(server)->vector.stops.size(); if (num <= 2) return; if ( SP_IS_LINEARGRADIENT(server) ) { for ( guint i = 1; i < num - 1; i++ ) { this->moveOtherToDraggable (draggable->item, POINT_LG_MID, i, draggable->fill_or_stroke, write_repr); } } else if ( SP_IS_RADIALGRADIENT(server) ) { for ( guint i = 1; i < num - 1; i++ ) { this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, i, draggable->fill_or_stroke, write_repr); this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, i, draggable->fill_or_stroke, write_repr); } } } /** Moves all draggables that depend on this one */ void GrDragger::updateDependencies (bool write_repr) { for (GSList const* i = this->draggables; i != NULL; i = i->next) { GrDraggable *draggable = (GrDraggable *) i->data; switch (draggable->point_type) { case POINT_LG_BEGIN: { // the end point is dependent only when dragging with ctrl+shift this->moveOtherToDraggable (draggable->item, POINT_LG_END, 0, draggable->fill_or_stroke, write_repr); this->updateMidstopDependencies (draggable, write_repr); } break; case POINT_LG_END: { // the begin point is dependent only when dragging with ctrl+shift this->moveOtherToDraggable (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke, write_repr); this->updateMidstopDependencies (draggable, write_repr); } break; case POINT_LG_MID: // no other nodes depend on mid points. break; case POINT_RG_R2: this->moveOtherToDraggable (draggable->item, POINT_RG_R1, 0, draggable->fill_or_stroke, write_repr); this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, 0, draggable->fill_or_stroke, write_repr); this->updateMidstopDependencies (draggable, write_repr); break; case POINT_RG_R1: this->moveOtherToDraggable (draggable->item, POINT_RG_R2, 0, draggable->fill_or_stroke, write_repr); this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, 0, draggable->fill_or_stroke, write_repr); this->updateMidstopDependencies (draggable, write_repr); break; case POINT_RG_CENTER: this->moveOtherToDraggable (draggable->item, POINT_RG_R1, 0, draggable->fill_or_stroke, write_repr); this->moveOtherToDraggable (draggable->item, POINT_RG_R2, 0, draggable->fill_or_stroke, write_repr); this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, 0, draggable->fill_or_stroke, write_repr); this->updateMidstopDependencies (draggable, write_repr); break; case POINT_RG_FOCUS: // nothing can depend on that break; case POINT_RG_MID1: this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, draggable->point_i, draggable->fill_or_stroke, write_repr); break; case POINT_RG_MID2: this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, draggable->point_i, draggable->fill_or_stroke, write_repr); break; default: break; } } } GrDragger::GrDragger (GrDrag *parent, NR::Point p, GrDraggable *draggable) { this->draggables = NULL; this->parent = parent; this->point = p; this->point_original = p; // create the knot this->knot = sp_knot_new (parent->desktop, NULL); this->knot->setMode(SP_KNOT_MODE_XOR); this->knot->setFill(GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_NORMAL); this->knot->setStroke(0x000000ff, 0x000000ff, 0x000000ff); sp_knot_update_ctrl(this->knot); // move knot to the given point sp_knot_set_position (this->knot, &p, SP_KNOT_STATE_NORMAL); sp_knot_show (this->knot); // connect knot's signals if ( (draggable) // it can be NULL if a node in unsnapped (eg. focus point unsnapped from center) // luckily, midstops never snap to other nodes so are never unsnapped... && ( (draggable->point_type == POINT_LG_MID) || (draggable->point_type == POINT_RG_MID1) || (draggable->point_type == POINT_RG_MID2) ) ) { this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_midpoint_handler), this); } else { this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_handler), this); } g_signal_connect (G_OBJECT (this->knot), "clicked", G_CALLBACK (gr_knot_clicked_handler), this); g_signal_connect (G_OBJECT (this->knot), "doubleclicked", G_CALLBACK (gr_knot_doubleclicked_handler), this); g_signal_connect (G_OBJECT (this->knot), "grabbed", G_CALLBACK (gr_knot_grabbed_handler), this); g_signal_connect (G_OBJECT (this->knot), "ungrabbed", G_CALLBACK (gr_knot_ungrabbed_handler), this); // add the initial draggable if (draggable) this->addDraggable (draggable); updateKnotShape(); } GrDragger::~GrDragger () { // unselect if it was selected this->parent->setDeselected(this); // disconnect signals g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_moved_handler), this); g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_clicked_handler), this); g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_doubleclicked_handler), this); g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_grabbed_handler), this); g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_ungrabbed_handler), this); /* unref should call destroy */ g_object_unref (G_OBJECT (this->knot)); // delete all draggables for (GSList const* i = this->draggables; i != NULL; i = i->next) { delete ((GrDraggable *) i->data); } g_slist_free (this->draggables); this->draggables = NULL; } /** Select the dragger which has the given draggable. */ GrDragger * GrDrag::getDraggerFor (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke) { for (GList const* i = this->draggers; i != NULL; i = i->next) { GrDragger *dragger = (GrDragger *) i->data; for (GSList const* j = dragger->draggables; j != NULL; j = j->next) { GrDraggable *da2 = (GrDraggable *) j->data; if ( (da2->item == item) && (da2->point_type == point_type) && (da2->point_i == point_i) && (da2->fill_or_stroke == fill_or_stroke)) { return (dragger); } } } return NULL; } void GrDragger::moveOtherToDraggable (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke, bool write_repr) { GrDragger *d = this->parent->getDraggerFor (item, point_type, point_i, fill_or_stroke); if (d && d != this) { d->moveThisToDraggable (item, point_type, point_i, fill_or_stroke, write_repr); } } /** Draw this dragger as selected */ void GrDragger::select() { this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_SELECTED; g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_SELECTED, NULL); } /** Draw this dragger as normal (deselected) */ void GrDragger::deselect() { this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_NORMAL; g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_NORMAL, NULL); } /** \brief Deselect all stops/draggers (private) */ void GrDrag::deselect_all() { while (selected) { ( (GrDragger*) selected->data)->deselect(); selected = g_list_remove(selected, selected->data); } } /** \brief Deselect all stops/draggers (public; emits signal) */ void GrDrag::deselectAll() { deselect_all(); this->desktop->emitToolSubselectionChanged(NULL); } /** \brief Select a dragger \param dragger The dragger to select \param add_to_selection If true, add to selection, otherwise deselect others \param override If true, always select this node, otherwise toggle selected status */ void GrDrag::setSelected (GrDragger *dragger, bool add_to_selection, bool override) { GrDragger *seldragger = NULL; if (add_to_selection) { if (!dragger) return; if (override) { if (!g_list_find(selected, dragger)) { selected = g_list_prepend(selected, dragger); } dragger->select(); seldragger = dragger; } else { // toggle if (g_list_find(selected, dragger)) { selected = g_list_remove(selected, dragger); dragger->deselect(); if (selected) { seldragger = (GrDragger*) selected->data; // select the dragger that is first in the list } } else { selected = g_list_prepend(selected, dragger); dragger->select(); seldragger = dragger; } } } else { deselect_all(); if (dragger) { selected = g_list_prepend(selected, dragger); dragger->select(); seldragger = dragger; } } if (seldragger) { this->desktop->emitToolSubselectionChanged((gpointer) seldragger); } } /** \brief Deselect a dragger \param dragger The dragger to deselect */ void GrDrag::setDeselected (GrDragger *dragger) { if (g_list_find(selected, dragger)) { selected = g_list_remove(selected, dragger); dragger->deselect(); } this->desktop->emitToolSubselectionChanged((gpointer) (selected ? selected->data : NULL )); } /** Create a line from p1 to p2 and add it to the lines list */ void GrDrag::addLine (NR::Point p1, NR::Point p2, guint32 rgba) { SPCanvasItem *line = sp_canvas_item_new(sp_desktop_controls(this->desktop), SP_TYPE_CTRLLINE, NULL); sp_ctrlline_set_coords(SP_CTRLLINE(line), p1, p2); if (rgba != GR_LINE_COLOR_FILL) // fill is the default, so don't set color for it to speed up redraw sp_ctrlline_set_rgba32 (SP_CTRLLINE(line), rgba); sp_canvas_item_show (line); this->lines = g_slist_append (this->lines, line); } /** If there already exists a dragger within MERGE_DIST of p, add the draggable to it; otherwise create new dragger and add it to draggers list */ void GrDrag::addDragger (GrDraggable *draggable) { NR::Point p = sp_item_gradient_get_coords (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke); for (GList *i = this->draggers; i != NULL; i = i->next) { GrDragger *dragger = (GrDragger *) i->data; if (dragger->mayMerge (draggable) && NR::L2 (dragger->point - p) < MERGE_DIST) { // distance is small, merge this draggable into dragger, no need to create new dragger dragger->addDraggable (draggable); dragger->updateKnotShape(); return; } } GrDragger *new_dragger = new GrDragger(this, p, draggable); // fixme: draggers should be added AFTER the last one: this way tabbing through them will be from begin to end. this->draggers = g_list_append (this->draggers, new_dragger); } /** Add draggers for the radial gradient rg on item */ void GrDrag::addDraggersRadial (SPRadialGradient *rg, SPItem *item, bool fill_or_stroke) { addDragger (new GrDraggable (item, POINT_RG_CENTER, 0, fill_or_stroke)); guint num = rg->vector.stops.size(); if (num > 2) { for ( guint i = 1; i < num - 1; i++ ) { addDragger (new GrDraggable (item, POINT_RG_MID1, i, fill_or_stroke)); } } addDragger (new GrDraggable (item, POINT_RG_R1, 0, fill_or_stroke)); if (num > 2) { for ( guint i = 1; i < num - 1; i++ ) { addDragger (new GrDraggable (item, POINT_RG_MID2, i, fill_or_stroke)); } } addDragger (new GrDraggable (item, POINT_RG_R2, 0, fill_or_stroke)); addDragger (new GrDraggable (item, POINT_RG_FOCUS, 0, fill_or_stroke)); } /** Add draggers for the linear gradient lg on item */ void GrDrag::addDraggersLinear (SPLinearGradient *lg, SPItem *item, bool fill_or_stroke) { addDragger (new GrDraggable (item, POINT_LG_BEGIN, 0, fill_or_stroke)); guint num = lg->vector.stops.size(); if (num > 2) { for ( guint i = 1; i < num - 1; i++ ) { addDragger (new GrDraggable (item, POINT_LG_MID, i, fill_or_stroke)); } } addDragger (new GrDraggable (item, POINT_LG_END, 0, fill_or_stroke)); } /** Artificially grab the knot of the dragger with this draggable; used by the gradient context */ void GrDrag::grabKnot (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke, gint x, gint y, guint32 etime) { GrDragger *dragger = getDraggerFor (item, point_type, point_i, fill_or_stroke); if (dragger) { sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime); } } /** Regenerates the draggers list from the current selection; is called when selection is changed or modified, also when a radial dragger needs to update positions of other draggers in the gradient */ void GrDrag::updateDraggers () { while (selected) { selected = g_list_remove(selected, selected->data); } // delete old draggers for (GList const* i = this->draggers; i != NULL; i = i->next) { delete ((GrDragger *) i->data); } g_list_free (this->draggers); this->draggers = NULL; g_return_if_fail (this->selection != NULL); for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) { SPItem *item = SP_ITEM(i->data); SPStyle *style = SP_OBJECT_STYLE (item); if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) { SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item); if (SP_IS_LINEARGRADIENT (server)) { addDraggersLinear (SP_LINEARGRADIENT (server), item, true); } else if (SP_IS_RADIALGRADIENT (server)) { addDraggersRadial (SP_RADIALGRADIENT (server), item, true); } } if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) { SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item); if (SP_IS_LINEARGRADIENT (server)) { addDraggersLinear (SP_LINEARGRADIENT (server), item, false); } else if (SP_IS_RADIALGRADIENT (server)) { addDraggersRadial (SP_RADIALGRADIENT (server), item, false); } } } } /** Regenerates the lines list from the current selection; is called on each move of a dragger, so that lines are always in sync with the actual gradient */ void GrDrag::updateLines () { // delete old lines for (GSList const *i = this->lines; i != NULL; i = i->next) { gtk_object_destroy( GTK_OBJECT (i->data)); } g_slist_free (this->lines); this->lines = NULL; g_return_if_fail (this->selection != NULL); for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) { SPItem *item = SP_ITEM(i->data); SPStyle *style = SP_OBJECT_STYLE (item); if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) { SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item); if (SP_IS_LINEARGRADIENT (server)) { this->addLine (sp_item_gradient_get_coords (item, POINT_LG_BEGIN, 0, true), sp_item_gradient_get_coords (item, POINT_LG_END, 0, true), GR_LINE_COLOR_FILL); } else if (SP_IS_RADIALGRADIENT (server)) { NR::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, true); this->addLine (center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, true), GR_LINE_COLOR_FILL); this->addLine (center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, true), GR_LINE_COLOR_FILL); } } if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) { SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item); if (SP_IS_LINEARGRADIENT (server)) { this->addLine (sp_item_gradient_get_coords (item, POINT_LG_BEGIN, 0, false), sp_item_gradient_get_coords (item, POINT_LG_END, 0, false), GR_LINE_COLOR_STROKE); } else if (SP_IS_RADIALGRADIENT (server)) { NR::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, false); this->addLine (center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, false), GR_LINE_COLOR_STROKE); this->addLine (center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, false), GR_LINE_COLOR_STROKE); } } } } /** Regenerates the levels list from the current selection */ void GrDrag::updateLevels () { hor_levels.clear(); vert_levels.clear(); g_return_if_fail (this->selection != NULL); for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) { SPItem *item = SP_ITEM(i->data); NR::Maybe rect = sp_item_bbox_desktop (item); if (rect) { // Remember the edges of the bbox and the center axis hor_levels.push_back(rect->min()[NR::Y]); hor_levels.push_back(rect->max()[NR::Y]); hor_levels.push_back(0.5 * (rect->min()[NR::Y] + rect->max()[NR::Y])); vert_levels.push_back(rect->min()[NR::X]); vert_levels.push_back(rect->max()[NR::X]); vert_levels.push_back(0.5 * (rect->min()[NR::X] + rect->max()[NR::X])); } } } void GrDrag::selected_reverse_vector () { if (selected == NULL) return; for (GSList const* i = ( (GrDragger*) selected->data )->draggables; i != NULL; i = i->next) { GrDraggable *draggable = (GrDraggable *) i->data; sp_item_gradient_reverse_vector (draggable->item, draggable->fill_or_stroke); } } void GrDrag::selected_move (double x, double y) { /* if (selected == NULL) return; if ( (g_list_length(selected) == 1) ) selected->point += NR::Point (x, y); selected->point_original = selected->point; sp_knot_moveto (selected->knot, &(selected->point)); selected->fireDraggables (true); selected->updateDependencies(true); // we did an undoable action sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT, _("Move gradient handle")); */ } void GrDrag::selected_move_screen (double x, double y) { gdouble zoom = desktop->current_zoom(); gdouble zx = x / zoom; gdouble zy = y / zoom; selected_move (zx, zy); } /** Select the knot next to the last selected one and deselect all other selected. */ void GrDrag::select_next () { if (selected == NULL || g_list_find(draggers, selected->data)->next == NULL) { if (draggers) setSelected ((GrDragger *) draggers->data); } else { setSelected ((GrDragger *) g_list_find(draggers, selected->data)->next->data); } } /** Select the knot previous from the last selected one and deselect all other selected. */ void GrDrag::select_prev () { if (selected == NULL || g_list_find(draggers, selected->data)->prev == NULL) { if (draggers) setSelected ((GrDragger *) g_list_last (draggers)->data); } else { setSelected ((GrDragger *) g_list_find(draggers, selected->data)->prev->data); } } // FIXME: i.m.o. an ugly function that I just made to work, but... aargh! (Johan) void GrDrag::deleteSelected (bool just_one) { if (!selected) return; SPDocument *document = false; struct StructStopInfo { SPStop * spstop; GrDraggable * draggable; SPGradient * gradient; SPGradient * vector; }; GSList *midstoplist = NULL; // list of stops that must be deleted (will be deleted first) GSList *endstoplist = NULL; // list of stops that must be deleted while (selected) { GrDragger *dragger = (GrDragger*) selected->data; for (GSList * drgble = dragger->draggables; drgble != NULL; drgble = drgble->next) { GrDraggable *draggable = (GrDraggable*) drgble->data; SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke); SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false); switch (draggable->point_type) { case POINT_LG_MID: case POINT_RG_MID1: case POINT_RG_MID2: { SPStop *stop = sp_get_stop_i(vector, draggable->point_i); // check if already present in list. (e.g. when both RG_MID1 and RG_MID2 were selected) bool present = false; for (GSList const * l = midstoplist; l != NULL; l = l->next) { if ( (SPStop*)l->data == stop ) { present = true; break; // no need to search further. } } if (!present) midstoplist = g_slist_append(midstoplist, stop); } break; case POINT_LG_BEGIN: case POINT_LG_END: case POINT_RG_CENTER: case POINT_RG_R1: case POINT_RG_R2: { SPStop *stop = NULL; if ( (draggable->point_type == POINT_LG_BEGIN) || (draggable->point_type == POINT_RG_CENTER) ) { stop = sp_first_stop(vector); } else { stop = sp_last_stop(vector); } if (stop) { StructStopInfo *stopinfo = new StructStopInfo; stopinfo->spstop = stop; stopinfo->draggable = draggable; stopinfo->gradient = gradient; stopinfo->vector = vector; // check if already present in list. (e.g. when both R1 and R2 were selected) bool present = false; for (GSList const * l = endstoplist; l != NULL; l = l->next) { if ( ((StructStopInfo*)l->data)->spstop == stopinfo->spstop ) { present = true; break; // no need to search further. } } if (!present) endstoplist = g_slist_append(endstoplist, stopinfo); } } break; default: break; } } selected = g_list_remove(selected, dragger); if ( just_one ) break; // iterate once if just_one is set. } while (midstoplist) { SPStop *stop = (SPStop*) midstoplist->data; document = SP_OBJECT_DOCUMENT (stop); Inkscape::XML::Node * parent = SP_OBJECT_REPR(stop)->parent(); parent->removeChild(SP_OBJECT_REPR(stop)); midstoplist = g_slist_remove(midstoplist, stop); } while (endstoplist) { StructStopInfo *stopinfo = (StructStopInfo*) endstoplist->data; document = SP_OBJECT_DOCUMENT (stopinfo->spstop); // 2 is the minimum, cannot delete more than that without deleting the whole vector // cannot use vector->vector.stops.size() because the vector might be invalidated by deletion of a midstop // manually count the children, don't know if there already exists a function for this... int len = 0; for ( SPObject *child = sp_object_first_child(stopinfo->vector) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) { if ( SP_IS_STOP(child) ) len ++; } if (len > 2) { switch (stopinfo->draggable->point_type) { case POINT_LG_BEGIN: { SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop)); SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient); NR::Point oldbegin = NR::Point (lg->x1.computed, lg->y1.computed); NR::Point end = NR::Point (lg->x2.computed, lg->y2.computed); SPStop *stop = sp_first_stop(stopinfo->vector); gdouble offset = stop->offset; NR::Point newbegin = oldbegin + offset * (end - oldbegin); lg->x1.computed = newbegin[NR::X]; lg->y1.computed = newbegin[NR::Y]; Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient); sp_repr_set_svg_double(repr, "x1", lg->x1.computed); sp_repr_set_svg_double(repr, "y1", lg->y1.computed); stop->offset = 0; sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", 0); // iterate through midstops to set new offset values such that they won't move on canvas. SPStop *laststop = sp_last_stop(stopinfo->vector); stop = sp_next_stop(stop); while ( stop != laststop ) { stop->offset = (stop->offset - offset)/(1 - offset); sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset); stop = sp_next_stop(stop); } } break; case POINT_LG_END: { SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop)); SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient); NR::Point begin = NR::Point (lg->x1.computed, lg->y1.computed); NR::Point oldend = NR::Point (lg->x2.computed, lg->y2.computed); SPStop *laststop = sp_last_stop(stopinfo->vector); gdouble offset = laststop->offset; NR::Point newend = begin + offset * (oldend - begin); lg->x2.computed = newend[NR::X]; lg->y2.computed = newend[NR::Y]; Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient); sp_repr_set_svg_double(repr, "x2", lg->x2.computed); sp_repr_set_svg_double(repr, "y2", lg->y2.computed); laststop->offset = 1; sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1); // iterate through midstops to set new offset values such that they won't move on canvas. SPStop *stop = sp_first_stop(stopinfo->vector); stop = sp_next_stop(stop); while ( stop != laststop ) { stop->offset = stop->offset / offset; sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset); stop = sp_next_stop(stop); } } break; case POINT_RG_CENTER: { SPStop *newfirst = sp_next_stop (stopinfo->spstop); if (newfirst) { newfirst->offset = 0; sp_repr_set_css_double (SP_OBJECT_REPR (newfirst), "offset", 0); } SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop)); } break; case POINT_RG_R1: case POINT_RG_R2: SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop)); SPRadialGradient *rg = SP_RADIALGRADIENT(stopinfo->gradient); double oldradius = rg->r.computed; SPStop *laststop = sp_last_stop(stopinfo->vector); gdouble offset = laststop->offset; double newradius = offset * oldradius; rg->r.computed = newradius; Inkscape::XML::Node *repr = SP_OBJECT_REPR(rg); sp_repr_set_svg_double(repr, "r", rg->r.computed); laststop->offset = 1; sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1); // iterate through midstops to set new offset values such that they won't move on canvas. SPStop *stop = sp_first_stop(stopinfo->vector); stop = sp_next_stop(stop); while ( stop != laststop ) { stop->offset = stop->offset / offset; sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset); stop = sp_next_stop(stop); } break; } } else { // delete the gradient from the object. set fill to unset FIXME: set to fill of unselected node? SPCSSAttr *css = sp_repr_css_attr_new (); // stopinfo->spstop is the selected stop Inkscape::XML::Node *unselectedrepr = SP_OBJECT_REPR(stopinfo->vector)->firstChild(); if (unselectedrepr == SP_OBJECT_REPR(stopinfo->spstop) ) { unselectedrepr = unselectedrepr->next(); } if (unselectedrepr == NULL) { if (stopinfo->draggable->fill_or_stroke) { sp_repr_css_unset_property (css, "fill"); } else { sp_repr_css_unset_property (css, "stroke"); } } else { SPCSSAttr *stopcss = sp_repr_css_attr(unselectedrepr, "style"); if (stopinfo->draggable->fill_or_stroke) { sp_repr_css_set_property(css, "fill", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset")); sp_repr_css_set_property(css, "fill-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1")); } else { sp_repr_css_set_property(css, "stroke", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset")); sp_repr_css_set_property(css, "stroke-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1")); } sp_repr_css_attr_unref (stopcss); } sp_repr_css_change (SP_OBJECT_REPR (stopinfo->draggable->item), css, "style"); sp_repr_css_attr_unref (css); } endstoplist = g_slist_remove(endstoplist, stopinfo); delete stopinfo; } if (document) { sp_document_done ( document, SP_VERB_CONTEXT_GRADIENT, _("Delete gradient stop(s)") ); } } /* Local Variables: mode:c++ c-file-style:"stroustrup" c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) indent-tabs-mode:nil fill-column:99 End: */ // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :