/* * Connector creation tool * * Authors: * Michael Wybrow <mjwybrow@users.sourceforge.net> * * Copyright (C) 2005 Michael Wybrow * * Released under GNU GPL, read the file 'COPYING' for more information * * TODO: * o Have shapes avoid convex hulls of objects, rather than their * bounding box. Possibly implement the unfinished ConvexHull * class in libnr. * (HOWEVER, using the convex hull C of a shape S does the wrong thing if a * connector starts outside of S but inside C, or if the best route around * an object involves going inside C but without entering S.) * o Draw connectors to shape edges rather than bounding box. * o Show a visual indicator for objects with the 'avoid' property set. * o Allow user to change a object between a path and connector through * the interface. * o Create an interface for setting markers (arrow heads). * o Better distinguish between paths and connectors to prevent problems * in the node tool and paths accidently being turned into connectors * in the connector tool. Perhaps have a way to convert between. * o Only call libavoid's updateEndPoint as required. Currently we do it * for both endpoints, even if only one is moving. * o Allow user-placeable connection points. * o Deal sanely with connectors with both endpoints attached to the * same connection point, and drawing of connectors attaching * overlaping shapes (currently tries to adjust connector to be * outside both bounding boxes). * o Fix many special cases related to connectors updating, * e.g., copying a couple of shapes and a connector that are * attached to each other. * e.g., detach connector when it is moved or transformed in * one of the other contexts. * o Cope with shapes whose ids change when they have attached * connectors. * o gobble_motion_events(GDK_BUTTON1_MASK)?; * */ #include <gdk/gdkkeysyms.h> #include "connector-context.h" #include "pixmaps/cursor-connector.xpm" #include "xml/node-event-vector.h" #include "xml/repr.h" #include "svg/svg.h" #include "desktop.h" #include "desktop-style.h" #include "desktop-affine.h" #include "desktop-handles.h" #include "document.h" #include "message-context.h" #include "message-stack.h" #include "selection.h" #include "inkscape.h" #include "prefs-utils.h" #include "sp-path.h" #include "display/canvas-bpath.h" #include "display/sodipodi-ctrl.h" #include <glibmm/i18n.h> #include "snap.h" #include "knot.h" #include "sp-conn-end.h" #include "conn-avoid-ref.h" #include "libavoid/vertices.h" #include "context-fns.h" #include "sp-namedview.h" #include "sp-text.h" #include "sp-flowtext.h" static void sp_connector_context_class_init(SPConnectorContextClass *klass); static void sp_connector_context_init(SPConnectorContext *conn_context); static void sp_connector_context_dispose(GObject *object); static void sp_connector_context_setup(SPEventContext *ec); static void sp_connector_context_finish(SPEventContext *ec); static gint sp_connector_context_root_handler(SPEventContext *ec, GdkEvent *event); static gint sp_connector_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event); // Stuff borrowed from DrawContext static void spcc_connector_set_initial_point(SPConnectorContext *cc, NR::Point const p); static void spcc_connector_set_subsequent_point(SPConnectorContext *cc, NR::Point const p); static void spcc_connector_finish_segment(SPConnectorContext *cc, NR::Point p); static void spcc_reset_colors(SPConnectorContext *cc); static void spcc_connector_finish(SPConnectorContext *cc); static void spcc_concat_colors_and_flush(SPConnectorContext *cc); static void spcc_flush_white(SPConnectorContext *cc, SPCurve *gc); // Context event handlers static gint connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent); static gint connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent); static gint connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent); static gint connector_handle_key_press(SPConnectorContext *const cc, guint const keyval); static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item); static void cc_clear_active_shape(SPConnectorContext *cc); static void cc_set_active_conn(SPConnectorContext *cc, SPItem *item); static void cc_clear_active_conn(SPConnectorContext *cc); static gchar *conn_pt_handle_test(SPConnectorContext *cc, NR::Point& w); static bool cc_item_is_shape(SPItem *item); static void cc_selection_changed(Inkscape::Selection *selection, gpointer data); static void cc_connector_rerouting_finish(SPConnectorContext *const cc, NR::Point *const p); static void shape_event_attr_deleted(Inkscape::XML::Node *repr, Inkscape::XML::Node *child, Inkscape::XML::Node *ref, gpointer data); static void shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name, gchar const *old_value, gchar const *new_value, bool is_interactive, gpointer data); static NR::Point connector_drag_origin_w(0, 0); static bool connector_within_tolerance = false; static SPEventContextClass *parent_class; static Inkscape::XML::NodeEventVector shape_repr_events = { NULL, /* child_added */ NULL, /* child_added */ shape_event_attr_changed, NULL, /* content_changed */ NULL /* order_changed */ }; static Inkscape::XML::NodeEventVector layer_repr_events = { NULL, /* child_added */ shape_event_attr_deleted, NULL, /* child_added */ NULL, /* content_changed */ NULL /* order_changed */ }; GType sp_connector_context_get_type(void) { static GType type = 0; if (!type) { GTypeInfo info = { sizeof(SPConnectorContextClass), NULL, NULL, (GClassInitFunc) sp_connector_context_class_init, NULL, NULL, sizeof(SPConnectorContext), 4, (GInstanceInitFunc) sp_connector_context_init, NULL, /* value_table */ }; type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPConnectorContext", &info, (GTypeFlags)0); } return type; } static void sp_connector_context_class_init(SPConnectorContextClass *klass) { GObjectClass *object_class; SPEventContextClass *event_context_class; object_class = (GObjectClass *) klass; event_context_class = (SPEventContextClass *) klass; parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass); object_class->dispose = sp_connector_context_dispose; event_context_class->setup = sp_connector_context_setup; event_context_class->finish = sp_connector_context_finish; event_context_class->root_handler = sp_connector_context_root_handler; event_context_class->item_handler = sp_connector_context_item_handler; } static void sp_connector_context_init(SPConnectorContext *cc) { SPEventContext *ec = SP_EVENT_CONTEXT(cc); ec->cursor_shape = cursor_connector_xpm; ec->hot_x = 1; ec->hot_y = 1; ec->xp = 0; ec->yp = 0; cc->red_color = 0xff00007f; cc->newconn = NULL; cc->newConnRef = NULL; cc->sel_changed_connection = sigc::connection(); cc->active_shape = NULL; cc->active_shape_repr = NULL; cc->active_shape_layer_repr = NULL; cc->active_conn = NULL; cc->active_conn_repr = NULL; cc->active_handle = NULL; cc->clickeditem = NULL; cc->clickedhandle = NULL; cc->connpthandle = NULL; for (int i = 0; i < 2; ++i) { cc->endpt_handle[i] = NULL; cc->endpt_handler_id[i] = 0; } cc->sid = NULL; cc->eid = NULL; cc->npoints = 0; cc->state = SP_CONNECTOR_CONTEXT_IDLE; } static void sp_connector_context_dispose(GObject *object) { SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(object); cc->sel_changed_connection.disconnect(); if (cc->connpthandle) { g_object_unref(cc->connpthandle); cc->connpthandle = NULL; } for (int i = 0; i < 2; ++i) { if (cc->endpt_handle[1]) { g_object_unref(cc->endpt_handle[i]); cc->endpt_handle[i] = NULL; } } if (cc->sid) { g_free(cc->sid); cc->sid = NULL; } if (cc->eid) { g_free(cc->eid); cc->eid = NULL; } g_assert( cc->newConnRef == NULL ); G_OBJECT_CLASS(parent_class)->dispose(object); } static void sp_connector_context_setup(SPEventContext *ec) { SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec); SPDesktop *dt = ec->desktop; if (((SPEventContextClass *) parent_class)->setup) { ((SPEventContextClass *) parent_class)->setup(ec); } cc->selection = sp_desktop_selection(dt); cc->sel_changed_connection.disconnect(); cc->sel_changed_connection = cc->selection->connectChanged( sigc::bind(sigc::ptr_fun(&cc_selection_changed), (gpointer) cc)); /* Create red bpath */ cc->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL); sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cc->red_bpath), cc->red_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT); sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cc->red_bpath), 0x00000000, SP_WIND_RULE_NONZERO); /* Create red curve */ cc->red_curve = sp_curve_new_sized(4); /* Create green curve */ cc->green_curve = sp_curve_new_sized(64); // Notice the initial selection. cc_selection_changed(cc->selection, (gpointer) cc); if (prefs_get_int_attribute("tools.connector", "selcue", 0) != 0) { ec->enableSelectionCue(); } // Make sure we see all enter events for canvas items, // even if a mouse button is depressed. dt->canvas->gen_all_enter_events = true; } static void sp_connector_context_finish(SPEventContext *ec) { SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec); spcc_connector_finish(cc); if (((SPEventContextClass *) parent_class)->finish) { ((SPEventContextClass *) parent_class)->finish(ec); } if (cc->selection) { cc->selection = NULL; } cc_clear_active_shape(cc); cc_clear_active_conn(cc); // Restore the default event generating behaviour. SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(ec); desktop->canvas->gen_all_enter_events = false; } //----------------------------------------------------------------------------- static void cc_clear_active_shape(SPConnectorContext *cc) { if (cc->active_shape == NULL) { return; } g_assert( cc->active_shape_repr ); g_assert( cc->active_shape_layer_repr ); cc->active_shape = NULL; if (cc->active_shape_repr) { sp_repr_remove_listener_by_data(cc->active_shape_repr, cc); Inkscape::GC::release(cc->active_shape_repr); cc->active_shape_repr = NULL; sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc); Inkscape::GC::release(cc->active_shape_layer_repr); cc->active_shape_layer_repr = NULL; } // Hide the center connection point if it exists. if (cc->connpthandle) { sp_knot_hide(cc->connpthandle); } } static void cc_clear_active_conn(SPConnectorContext *cc) { if (cc->active_conn == NULL) { return; } g_assert( cc->active_conn_repr ); cc->active_conn = NULL; if (cc->active_conn_repr) { sp_repr_remove_listener_by_data(cc->active_conn_repr, cc); Inkscape::GC::release(cc->active_conn_repr); cc->active_conn_repr = NULL; } // Hide the endpoint handles. for (int i = 0; i < 2; ++i) { if (cc->endpt_handle[i]) { sp_knot_hide(cc->endpt_handle[i]); } } } static gchar * conn_pt_handle_test(SPConnectorContext *cc, NR::Point& p) { // TODO: this will need to change when there are more connection // points available for each shape. SPKnot *centerpt = cc->connpthandle; if (cc->active_handle && (cc->active_handle == centerpt)) { p = centerpt->pos; return g_strdup_printf("#%s", SP_OBJECT_ID(cc->active_shape)); } return NULL; } static gint sp_connector_context_item_handler(SPEventContext *ec, SPItem *item, GdkEvent *event) { gint ret = FALSE; SPDesktop *desktop = ec->desktop; SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec); NR::Point p(event->button.x, event->button.y); switch (event->type) { case GDK_BUTTON_RELEASE: if (event->button.button == 1) { if ((cc->state == SP_CONNECTOR_CONTEXT_DRAGGING) && (connector_within_tolerance)) { spcc_reset_colors(cc); cc->state = SP_CONNECTOR_CONTEXT_IDLE; } if (cc->state != SP_CONNECTOR_CONTEXT_IDLE) { // Doing simething else like rerouting. break; } // find out clicked item, disregarding groups, honoring Alt SPItem *item_ungrouped = sp_event_context_find_item(desktop, p, event->button.state & GDK_MOD1_MASK, TRUE); if (event->button.state & GDK_SHIFT_MASK) { cc->selection->toggle(item_ungrouped); } else { cc->selection->set(item_ungrouped); } ret = TRUE; } break; case GDK_ENTER_NOTIFY: { if (cc_item_is_shape(item)) { // This is a shape, so show connection point(s). if (!(cc->active_shape) || // Don't show handle for another handle. (item != ((SPItem *) cc->connpthandle))) { cc_set_active_shape(cc, item); } } ret = TRUE; break; } default: break; } return ret; } gint sp_connector_context_root_handler(SPEventContext *ec, GdkEvent *event) { SPConnectorContext *const cc = SP_CONNECTOR_CONTEXT(ec); gint ret = FALSE; switch (event->type) { case GDK_BUTTON_PRESS: ret = connector_handle_button_press(cc, event->button); break; case GDK_MOTION_NOTIFY: ret = connector_handle_motion_notify(cc, event->motion); break; case GDK_BUTTON_RELEASE: ret = connector_handle_button_release(cc, event->button); break; case GDK_KEY_PRESS: ret = connector_handle_key_press(cc, get_group0_keyval (&event->key)); break; default: break; } if (!ret) { gint (*const parent_root_handler)(SPEventContext *, GdkEvent *) = ((SPEventContextClass *) parent_class)->root_handler; if (parent_root_handler) { ret = parent_root_handler(ec, event); } } return ret; } static gint connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent) { NR::Point const event_w(bevent.x, bevent.y); /* Find desktop coordinates */ NR::Point p = cc->desktop->w2d(event_w); gint ret = FALSE; if ( bevent.button == 1 ) { SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc); if (Inkscape::have_viable_layer(desktop, cc->_message_context) == false) { return TRUE; } NR::Point const event_w(bevent.x, bevent.y); connector_drag_origin_w = event_w; connector_within_tolerance = true; NR::Point const event_dt = cc->desktop->w2d(event_w); switch (cc->state) { case SP_CONNECTOR_CONTEXT_STOP: /* This is allowed, if we just cancelled curve */ case SP_CONNECTOR_CONTEXT_IDLE: { if ( cc->npoints == 0 ) { /* Set start anchor */ NR::Point p; cc_clear_active_conn(cc); SP_EVENT_CONTEXT_DESKTOP(cc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new connector")); /* Create green anchor */ p = event_dt; // Test whether we clicked on a connection point cc->sid = conn_pt_handle_test(cc, p); if (!cc->sid) { // This is the first point, so just snap it to the grid // as there's no other points to go off. SnapManager const &m = cc->desktop->namedview->snap_manager; p = m.freeSnap(Inkscape::Snapper::SNAP_POINT | Inkscape::Snapper::BBOX_POINT, p, NULL).getPoint(); } spcc_connector_set_initial_point(cc, p); } cc->state = SP_CONNECTOR_CONTEXT_DRAGGING; ret = TRUE; break; } case SP_CONNECTOR_CONTEXT_DRAGGING: { // This is the second click of a connector creation. spcc_connector_set_subsequent_point(cc, p); spcc_connector_finish_segment(cc, p); // Test whether we clicked on a connection point cc->eid = conn_pt_handle_test(cc, p); if (cc->npoints != 0) { spcc_connector_finish(cc); } cc_set_active_conn(cc, cc->newconn); cc->state = SP_CONNECTOR_CONTEXT_IDLE; ret = TRUE; break; } case SP_CONNECTOR_CONTEXT_CLOSE: { g_warning("Button down in CLOSE state"); break; } default: break; } } else if (bevent.button == 3) { if (cc->state == SP_CONNECTOR_CONTEXT_REROUTING) { // A context menu is going to be triggered here, // so end the rerouting operation. cc_connector_rerouting_finish(cc, &p); cc->state = SP_CONNECTOR_CONTEXT_IDLE; // Don't set ret to TRUE, so we drop through to the // parent handler which will open the context menu. } else if (cc->npoints != 0) { spcc_connector_finish(cc); ret = TRUE; } } return ret; } static gint connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent) { gint ret = FALSE; if (mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) { // allow middle-button scrolling return FALSE; } NR::Point const event_w(mevent.x, mevent.y); if (connector_within_tolerance) { gint const tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100); if ( NR::LInfty( event_w - connector_drag_origin_w ) < tolerance ) { return FALSE; // 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 move the object, not click), then always process // the motion notify coordinates as given (no snapping back to origin) connector_within_tolerance = false; SPDesktop *const dt = cc->desktop; /* Find desktop coordinates */ NR::Point p = dt->w2d(event_w); switch (cc->state) { case SP_CONNECTOR_CONTEXT_DRAGGING: { // This is movement during a connector creation. if ( cc->npoints > 0 ) { cc->selection->clear(); spcc_connector_set_subsequent_point(cc, p); ret = TRUE; } break; } case SP_CONNECTOR_CONTEXT_REROUTING: { g_assert( SP_IS_PATH(cc->clickeditem)); // Update the hidden path NR::Matrix i2d = sp_item_i2d_affine(cc->clickeditem); NR::Matrix d2i = i2d.inverse(); SPPath *path = SP_PATH(cc->clickeditem); SPCurve *curve = (SP_SHAPE(path))->curve; if (cc->clickedhandle == cc->endpt_handle[0]) { NR::Point o = cc->endpt_handle[1]->pos; sp_curve_stretch_endpoints(curve, p * d2i, o * d2i); } else { NR::Point o = cc->endpt_handle[0]->pos; sp_curve_stretch_endpoints(curve, o * d2i, p * d2i); } sp_conn_adjust_path(path); // Copy this to the temporary visible path cc->red_curve = sp_curve_copy(SP_SHAPE(path)->curve); sp_curve_transform(cc->red_curve, i2d); sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve); ret = TRUE; break; } case SP_CONNECTOR_CONTEXT_STOP: /* This is perfectly valid */ break; default: break; } return ret; } static gint connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent) { gint ret = FALSE; if ( revent.button == 1 ) { SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc); SPDocument *doc = sp_desktop_document(desktop); NR::Point const event_w(revent.x, revent.y); /* Find desktop coordinates */ NR::Point p = cc->desktop->w2d(event_w); switch (cc->state) { //case SP_CONNECTOR_CONTEXT_POINT: case SP_CONNECTOR_CONTEXT_DRAGGING: { if (connector_within_tolerance) { spcc_connector_finish_segment(cc, p); return TRUE; } // Connector has been created via a drag, end it now. spcc_connector_set_subsequent_point(cc, p); spcc_connector_finish_segment(cc, p); // Test whether we clicked on a connection point cc->eid = conn_pt_handle_test(cc, p); if (cc->npoints != 0) { spcc_connector_finish(cc); } cc_set_active_conn(cc, cc->newconn); cc->state = SP_CONNECTOR_CONTEXT_IDLE; break; } case SP_CONNECTOR_CONTEXT_REROUTING: { cc_connector_rerouting_finish(cc, &p); sp_document_ensure_up_to_date(doc); cc->state = SP_CONNECTOR_CONTEXT_IDLE; return TRUE; break; } case SP_CONNECTOR_CONTEXT_STOP: /* This is allowed, if we just cancelled curve */ break; default: break; } ret = TRUE; } return ret; } static gint connector_handle_key_press(SPConnectorContext *const cc, guint const keyval) { gint ret = FALSE; /* fixme: */ switch (keyval) { case GDK_Return: case GDK_KP_Enter: if (cc->npoints != 0) { spcc_connector_finish(cc); ret = TRUE; } break; case GDK_Escape: if (cc->state == SP_CONNECTOR_CONTEXT_REROUTING) { SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc); SPDocument *doc = sp_desktop_document(desktop); cc_connector_rerouting_finish(cc, NULL); sp_document_undo(doc); cc->state = SP_CONNECTOR_CONTEXT_IDLE; desktop->messageStack()->flash( Inkscape::NORMAL_MESSAGE, _("Connector endpoint drag canceled.")); ret = TRUE; } else if (cc->npoints != 0) { // if drawing, cancel, otherwise pass it up for deselecting cc->state = SP_CONNECTOR_CONTEXT_STOP; spcc_reset_colors(cc); ret = TRUE; } break; default: break; } return ret; } static void cc_connector_rerouting_finish(SPConnectorContext *const cc, NR::Point *const p) { SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc); SPDocument *doc = sp_desktop_document(desktop); // Clear the temporary path: sp_curve_reset(cc->red_curve); sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL); if (p != NULL) { // Test whether we clicked on a connection point gchar *shape_label = conn_pt_handle_test(cc, *p); if (shape_label) { if (cc->clickedhandle == cc->endpt_handle[0]) { sp_object_setAttribute(cc->clickeditem, "inkscape:connection-start",shape_label, false); } else { sp_object_setAttribute(cc->clickeditem, "inkscape:connection-end",shape_label, false); } g_free(shape_label); } } cc->clickeditem->setHidden(false); sp_conn_adjust_path(SP_PATH(cc->clickeditem)); cc->clickeditem->updateRepr(); sp_document_done(doc, SP_VERB_CONTEXT_CONNECTOR, _("Reroute connector")); cc_set_active_conn(cc, cc->clickeditem); } static void spcc_reset_colors(SPConnectorContext *cc) { /* Red */ sp_curve_reset(cc->red_curve); sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL); sp_curve_reset(cc->green_curve); cc->npoints = 0; } static void spcc_connector_set_initial_point(SPConnectorContext *const cc, NR::Point const p) { g_assert( cc->npoints == 0 ); cc->p[0] = p; cc->p[1] = p; cc->npoints = 2; sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL); } static void spcc_connector_set_subsequent_point(SPConnectorContext *const cc, NR::Point const p) { g_assert( cc->npoints != 0 ); SPDesktop *dt = cc->desktop; NR::Point o = dt->dt2doc(cc->p[0]); NR::Point d = dt->dt2doc(p); Avoid::Point src(o[NR::X], o[NR::Y]); Avoid::Point dst(d[NR::X], d[NR::Y]); if (!cc->newConnRef) { Avoid::Router *router = sp_desktop_document(dt)->router; cc->newConnRef = new Avoid::ConnRef(router, 0, src, dst); cc->newConnRef->updateEndPoint(Avoid::VertID::src, src); } cc->newConnRef->updateEndPoint(Avoid::VertID::tar, dst); cc->newConnRef->makePathInvalid(); cc->newConnRef->generatePath(src, dst); Avoid::PolyLine route = cc->newConnRef->route(); cc->newConnRef->calcRouteDist(); sp_curve_reset(cc->red_curve); NR::Point pt(route.ps[0].x, route.ps[0].y); sp_curve_moveto(cc->red_curve, pt); for (int i = 1; i < route.pn; ++i) { NR::Point p(route.ps[i].x, route.ps[i].y); sp_curve_lineto(cc->red_curve, p); } sp_curve_transform(cc->red_curve, dt->doc2dt()); sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve); } /** * Concats red, blue and green. * If any anchors are defined, process these, optionally removing curves from white list * Invoke _flush_white to write result back to object. */ static void spcc_concat_colors_and_flush(SPConnectorContext *cc) { SPCurve *c = cc->green_curve; cc->green_curve = sp_curve_new_sized(64); sp_curve_reset(cc->red_curve); sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL); if (sp_curve_empty(c)) { sp_curve_unref(c); return; } spcc_flush_white(cc, c); sp_curve_unref(c); } /* * Flushes white curve(s) and additional curve into object * * No cleaning of colored curves - this has to be done by caller * No rereading of white data, so if you cannot rely on ::modified, do it in caller * */ static void spcc_flush_white(SPConnectorContext *cc, SPCurve *gc) { SPCurve *c; if (gc) { c = gc; sp_curve_ref(c); } else { return; } /* Now we have to go back to item coordinates at last */ sp_curve_transform(c, sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(cc))); SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc); SPDocument *doc = sp_desktop_document(desktop); if ( c && !sp_curve_empty(c) ) { /* We actually have something to write */ Inkscape::XML::Node *repr = sp_repr_new("svg:path"); /* Set style */ sp_desktop_apply_style_tool(desktop, repr, "tools.connector", false); gchar *str = sp_svg_write_path(SP_CURVE_BPATH(c)); g_assert( str != NULL ); repr->setAttribute("d", str); g_free(str); /* Attach repr */ cc->newconn = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr)); cc->selection->set(repr); Inkscape::GC::release(repr); cc->newconn->transform = i2i_affine(desktop->currentRoot(), desktop->currentLayer()); cc->newconn->updateRepr(); bool connection = false; sp_object_setAttribute(cc->newconn, "inkscape:connector-type", "polyline", false); if (cc->sid) { sp_object_setAttribute(cc->newconn, "inkscape:connection-start", cc->sid, false); connection = true; } if (cc->eid) { sp_object_setAttribute(cc->newconn, "inkscape:connection-end", cc->eid, false); connection = true; } cc->newconn->updateRepr(); if (connection) { // Adjust endpoints to shape edge. sp_conn_adjust_path(SP_PATH(cc->newconn)); } cc->newconn->updateRepr(); } sp_curve_unref(c); /* Flush pending updates */ sp_document_done(doc, SP_VERB_CONTEXT_CONNECTOR, _("Create connector")); sp_document_ensure_up_to_date(doc); } static void spcc_connector_finish_segment(SPConnectorContext *const cc, NR::Point const p) { if (!sp_curve_empty(cc->red_curve)) { sp_curve_append_continuous(cc->green_curve, cc->red_curve, 0.0625); cc->p[0] = cc->p[3]; cc->p[1] = cc->p[4]; cc->npoints = 2; sp_curve_reset(cc->red_curve); } } static void spcc_connector_finish(SPConnectorContext *const cc) { SPDesktop *const desktop = cc->desktop; desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing connector")); sp_curve_reset(cc->red_curve); spcc_concat_colors_and_flush(cc); cc->npoints = 0; if (cc->newConnRef) { cc->newConnRef->removeFromGraph(); delete cc->newConnRef; cc->newConnRef = NULL; } cc->state = SP_CONNECTOR_CONTEXT_IDLE; } static gboolean cc_generic_knot_handler(SPCanvasItem *, GdkEvent *event, SPKnot *knot) { g_assert (knot != NULL); g_object_ref(knot); SPConnectorContext *cc = SP_CONNECTOR_CONTEXT( knot->desktop->event_context); gboolean consumed = FALSE; switch (event->type) { case GDK_ENTER_NOTIFY: sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, TRUE); cc->active_handle = knot; if (knot->tip) { knot->desktop->event_context->defaultMessageContext()->set( Inkscape::NORMAL_MESSAGE, knot->tip); } consumed = TRUE; break; case GDK_LEAVE_NOTIFY: sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, FALSE); cc->active_handle = NULL; if (knot->tip) { knot->desktop->event_context->defaultMessageContext()->clear(); } consumed = TRUE; break; default: break; } g_object_unref(knot); return consumed; } static gboolean endpt_handler(SPKnot *knot, GdkEvent *event, SPConnectorContext *cc) { g_assert( SP_IS_CONNECTOR_CONTEXT(cc) ); gboolean consumed = FALSE; switch (event->type) { case GDK_BUTTON_PRESS: g_assert( (cc->active_handle == cc->endpt_handle[0]) || (cc->active_handle == cc->endpt_handle[1]) ); if (cc->state == SP_CONNECTOR_CONTEXT_IDLE) { cc->clickeditem = cc->active_conn; cc->clickedhandle = cc->active_handle; cc_clear_active_conn(cc); cc->state = SP_CONNECTOR_CONTEXT_REROUTING; // Disconnect from attached shape unsigned ind = (cc->active_handle == cc->endpt_handle[0]) ? 0 : 1; sp_conn_end_detach(cc->clickeditem, ind); NR::Point origin; if (cc->clickedhandle == cc->endpt_handle[0]) { origin = cc->endpt_handle[1]->pos; } else { origin = cc->endpt_handle[0]->pos; } // Show the red path for dragging. cc->red_curve = sp_curve_copy(SP_PATH(cc->clickeditem)->curve); NR::Matrix i2d = sp_item_i2d_affine(cc->clickeditem); sp_curve_transform(cc->red_curve, i2d); sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve); cc->clickeditem->setHidden(true); // The rest of the interaction rerouting the connector is // handled by the context root handler. consumed = TRUE; } break; default: break; } return consumed; } static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item) { g_assert(item != NULL ); cc->active_shape = item; // Remove existing active shape listeners if (cc->active_shape_repr) { sp_repr_remove_listener_by_data(cc->active_shape_repr, cc); Inkscape::GC::release(cc->active_shape_repr); sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc); Inkscape::GC::release(cc->active_shape_layer_repr); } // Listen in case the active shape changes cc->active_shape_repr = SP_OBJECT_REPR(item); if (cc->active_shape_repr) { Inkscape::GC::anchor(cc->active_shape_repr); sp_repr_add_listener(cc->active_shape_repr, &shape_repr_events, cc); cc->active_shape_layer_repr = cc->active_shape_repr->parent(); Inkscape::GC::anchor(cc->active_shape_layer_repr); sp_repr_add_listener(cc->active_shape_layer_repr, &layer_repr_events, cc); } // Set center connection point. if ( cc->connpthandle == NULL ) { SPKnot *knot = sp_knot_new(cc->desktop, _("<b>Connection point</b>: click or drag to create a new connector")); knot->setShape(SP_KNOT_SHAPE_SQUARE); knot->setSize(8); knot->setAnchor(GTK_ANCHOR_CENTER); knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff); sp_knot_update_ctrl(knot); // We don't want to use the standard knot handler, //since we don't want this knot to be draggable. g_signal_handler_disconnect(G_OBJECT(knot->item), knot->_event_handler_id); knot->_event_handler_id = 0; gtk_signal_connect(GTK_OBJECT(knot->item), "event", GTK_SIGNAL_FUNC(cc_generic_knot_handler), knot); cc->connpthandle = knot; } NR::Rect bbox = sp_item_bbox_desktop(cc->active_shape); NR::Point center = bbox.midpoint(); sp_knot_set_position(cc->connpthandle, ¢er, 0); sp_knot_show(cc->connpthandle); } static void cc_set_active_conn(SPConnectorContext *cc, SPItem *item) { g_assert( SP_IS_PATH(item) ); SPCurve *curve = SP_SHAPE(SP_PATH(item))->curve; NR::Matrix i2d = sp_item_i2d_affine(item); if (cc->active_conn == item) { // Just adjust handle positions. NR::Point startpt = sp_curve_first_point(curve) * i2d; sp_knot_set_position(cc->endpt_handle[0], &startpt, 0); NR::Point endpt = sp_curve_last_point(curve) * i2d; sp_knot_set_position(cc->endpt_handle[1], &endpt, 0); return; } cc->active_conn = item; // Remove existing active conn listeners if (cc->active_conn_repr) { sp_repr_remove_listener_by_data(cc->active_conn_repr, cc); Inkscape::GC::release(cc->active_conn_repr); cc->active_conn_repr = NULL; } // Listen in case the active conn changes cc->active_conn_repr = SP_OBJECT_REPR(item); if (cc->active_conn_repr) { Inkscape::GC::anchor(cc->active_conn_repr); sp_repr_add_listener(cc->active_conn_repr, &shape_repr_events, cc); } for (int i = 0; i < 2; ++i) { // Create the handle if it doesn't exist if ( cc->endpt_handle[i] == NULL ) { SPKnot *knot = sp_knot_new(cc->desktop, _("<b>Connector endpoint</b>: drag to reroute or connect to new shapes")); knot->setShape(SP_KNOT_SHAPE_SQUARE); knot->setSize(7); knot->setAnchor(GTK_ANCHOR_CENTER); knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff); knot->setStroke(0x000000ff, 0x000000ff, 0x000000ff); sp_knot_update_ctrl(knot); // We don't want to use the standard knot handler, //since we don't want this knot to be draggable. g_signal_handler_disconnect(G_OBJECT(knot->item), knot->_event_handler_id); knot->_event_handler_id = 0; gtk_signal_connect(GTK_OBJECT(knot->item), "event", GTK_SIGNAL_FUNC(cc_generic_knot_handler), knot); cc->endpt_handle[i] = knot; } // Remove any existing handlers if (cc->endpt_handler_id[i]) { g_signal_handlers_disconnect_by_func( G_OBJECT(cc->endpt_handle[i]->item), (void*)G_CALLBACK(endpt_handler), (gpointer) cc ); cc->endpt_handler_id[i] = 0; } // Setup handlers for connector endpoints, this is // is as 'after' so that cc_generic_knot_handler is // triggered first for any endpoint. cc->endpt_handler_id[i] = g_signal_connect_after( G_OBJECT(cc->endpt_handle[i]->item), "event", G_CALLBACK(endpt_handler), cc); } NR::Point startpt = sp_curve_first_point(curve) * i2d; sp_knot_set_position(cc->endpt_handle[0], &startpt, 0); NR::Point endpt = sp_curve_last_point(curve) * i2d; sp_knot_set_position(cc->endpt_handle[1], &endpt, 0); sp_knot_show(cc->endpt_handle[0]); sp_knot_show(cc->endpt_handle[1]); } static bool cc_item_is_shape(SPItem *item) { if (SP_IS_PATH(item)) { SPCurve *curve = (SP_SHAPE(item))->curve; if ( curve && !(curve->closed) ) { // Open paths are connectors. return false; } } else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) { if (prefs_get_int_attribute("tools.connector", "ignoretext", 1) == 1) { // Don't count text as a shape we can connect connector to. return false; } } return true; } bool cc_item_is_connector(SPItem *item) { if (SP_IS_PATH(item)) { if (SP_PATH(item)->connEndPair.isAutoRoutingConn()) { g_assert( !(SP_SHAPE(item)->curve->closed) ); return true; } } return false; } void cc_selection_set_avoid(bool const set_avoid) { SPDesktop *desktop = inkscape_active_desktop(); if (desktop == NULL) { return; } SPDocument *document = sp_desktop_document(desktop); Inkscape::Selection *selection = sp_desktop_selection(desktop); GSList *l = (GSList *) selection->itemList(); int changes = 0; while (l) { SPItem *item = (SPItem *) l->data; char const *value = (set_avoid) ? "true" : NULL; if (cc_item_is_shape(item)) { sp_object_setAttribute(item, "inkscape:connector-avoid", value, false); item->avoidRef->handleSettingChange(); changes++; } l = l->next; } if (changes == 0) { desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>at least one non-connector object</b>.")); return; } char *event_desc = (set_avoid) ? _("Make connectors avoid selected objects") : _("Make connectors ignore selected objects"); sp_document_done(document, SP_VERB_CONTEXT_CONNECTOR, event_desc); } static void cc_selection_changed(Inkscape::Selection *selection, gpointer data) { SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data); //SPEventContext *ec = SP_EVENT_CONTEXT(cc); SPItem *item = selection->singleItem(); if (cc->active_conn == item) { // Nothing to change. return; } if (item == NULL) { cc_clear_active_conn(cc); return; } if (cc_item_is_connector(item)) { cc_set_active_conn(cc, item); } } static void shape_event_attr_deleted(Inkscape::XML::Node *repr, Inkscape::XML::Node *child, Inkscape::XML::Node *ref, gpointer data) { g_assert(data); SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data); if (child == cc->active_shape_repr) { // The active shape has been deleted. Clear active shape. cc_clear_active_shape(cc); } } static void shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name, gchar const *old_value, gchar const *new_value, bool is_interactive, gpointer data) { g_assert(data); SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data); // Look for changes than result in onscreen movement. if (!strcmp(name, "d") || !strcmp(name, "x") || !strcmp(name, "y") || !strcmp(name, "width") || !strcmp(name, "height") || !strcmp(name, "transform")) { if (repr == cc->active_shape_repr) { // Active shape has moved. Clear active shape. cc_clear_active_shape(cc); } else if (repr == cc->active_conn_repr) { // The active conn has been moved. // Set it again, which just sets new handle positions. cc_set_active_conn(cc, cc->active_conn); } } } /* 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:encoding=utf-8:textwidth=99 :