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Diffstat (limited to 'src/connector-context.cpp')
| -rw-r--r-- | src/connector-context.cpp | 1350 |
1 files changed, 1350 insertions, 0 deletions
diff --git a/src/connector-context.cpp b/src/connector-context.cpp new file mode 100644 index 000000000..34f5ba3ed --- /dev/null +++ b/src/connector-context.cpp @@ -0,0 +1,1350 @@ +/* + * 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 coonvex 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 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 Cleanup to remove unecessary borrowed DrawContext code. + * 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" + + + +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 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_DT_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_DT_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(); + } +} + + +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); +} + + +//----------------------------------------------------------------------------- + + +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); + 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->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_DT_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: + { + // Clear the temporary path: + sp_curve_reset(cc->red_curve); + sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), 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); + cc_set_active_conn(cc, cc->clickeditem); + 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->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 +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) { + cc->newConnRef = new Avoid::ConnRef(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_DT_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_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); + + SPConnectorContext *cc = SP_CONNECTOR_CONTEXT( + knot->desktop->event_context); + + gboolean consumed = FALSE; + + switch (event->type) { + case GDK_ENTER_NOTIFY: + gtk_object_set (GTK_OBJECT (knot->item), "fill_color", + knot->fill [SP_KNOT_STATE_MOUSEOVER], NULL); + gtk_object_set (GTK_OBJECT (knot->item), "stroke_color", + knot->stroke [SP_KNOT_STATE_MOUSEOVER], NULL); + + 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: + gtk_object_set (GTK_OBJECT (knot->item), "fill_color", + knot->fill [SP_KNOT_STATE_NORMAL], NULL); + gtk_object_set (GTK_OBJECT (knot->item), "stroke_color", + knot->stroke [SP_KNOT_STATE_NORMAL], NULL); + + cc->active_handle = NULL; + + if (knot->tip) { + knot->desktop->event_context->defaultMessageContext()->clear(); + } + + consumed = TRUE; + break; + default: + break; + } + + 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 = (SPKnot*)g_object_new (SP_TYPE_KNOT, 0); + + knot->desktop = cc->desktop; + knot->flags = SP_KNOT_VISIBLE; + + knot->item = sp_canvas_item_new (SP_DT_CONTROLS(cc->desktop), + SP_TYPE_CTRL, + "anchor", GTK_ANCHOR_CENTER, + "filled", TRUE, + "stroked", TRUE, + "mode", SP_KNOT_MODE_XOR, + NULL); + + gtk_signal_connect (GTK_OBJECT (knot->item), "event", + GTK_SIGNAL_FUNC (cc_generic_knot_handler), knot); + + knot->fill [SP_KNOT_STATE_NORMAL] = 0xffffff00; + knot->fill [SP_KNOT_STATE_MOUSEOVER] = 0xff0000ff; + knot->stroke [SP_KNOT_STATE_NORMAL] = 0x01000000; + + g_object_set(G_OBJECT(knot), + "shape", SP_KNOT_SHAPE_SQUARE, + "size", 8, + "anchor", GTK_ANCHOR_CENTER, + "tip", _("<b>Connection point</b>: click or drag to create a new connector"), + NULL); + + 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 = (SPKnot*) g_object_new (SP_TYPE_KNOT, 0); + + knot->desktop = cc->desktop; + knot->flags = SP_KNOT_VISIBLE; + + knot->item = sp_canvas_item_new (SP_DT_CONTROLS (cc->desktop), + SP_TYPE_CTRL, + "anchor", GTK_ANCHOR_CENTER, + "filled", TRUE, + "stroked", TRUE, + "mode", SP_KNOT_MODE_XOR, + NULL); + + knot->fill [SP_KNOT_STATE_NORMAL] = 0xffffff00; + knot->stroke [SP_KNOT_STATE_NORMAL] = 0x000000ff; + knot->stroke [SP_KNOT_STATE_DRAGGING] = 0x000000ff; + knot->stroke [SP_KNOT_STATE_MOUSEOVER] = 0x000000ff; + + g_object_set(G_OBJECT(knot), + "shape", SP_KNOT_SHAPE_DIAMOND, + "size", 10, + "tip", _("<b>Connector endpoint</b>: drag to reroute or connect to new shapes"), + NULL); + + 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; + } + } + 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_DT_DOCUMENT(desktop); + + Inkscape::Selection *selection = SP_DT_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; + } + + sp_document_done(document); +} + + +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) + { + // Noting 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 : |