#define __SP_SPIRAL_CONTEXT_C__ /* * Spiral drawing context * * Authors: * Mitsuru Oka * Lauris Kaplinski <lauris@kaplinski.com> * bulia byak <buliabyak@users.sf.net> * * Copyright (C) 1999-2001 Lauris Kaplinski * Copyright (C) 2001-2002 Mitsuru Oka * * Released under GNU GPL */ #include "config.h" #include <gdk/gdkkeysyms.h> #include <cstring> #include <string> #include "macros.h" #include "display/sp-canvas.h" #include "sp-spiral.h" #include "document.h" #include "sp-namedview.h" #include "selection.h" #include "desktop-handles.h" #include "desktop-affine.h" #include "snap.h" #include "desktop.h" #include "desktop-style.h" #include "message-context.h" #include "pixmaps/cursor-spiral.xpm" #include "spiral-context.h" #include "sp-metrics.h" #include <glibmm/i18n.h> #include "object-edit.h" #include "xml/repr.h" #include "xml/node-event-vector.h" #include "prefs-utils.h" #include "context-fns.h" static void sp_spiral_context_class_init(SPSpiralContextClass * klass); static void sp_spiral_context_init(SPSpiralContext *spiral_context); static void sp_spiral_context_dispose(GObject *object); static void sp_spiral_context_setup(SPEventContext *ec); static void sp_spiral_context_set(SPEventContext *ec, gchar const *key, gchar const *val); static gint sp_spiral_context_root_handler(SPEventContext *event_context, GdkEvent *event); static void sp_spiral_drag(SPSpiralContext *sc, NR::Point p, guint state); static void sp_spiral_finish(SPSpiralContext *sc); static SPEventContextClass *parent_class; GtkType sp_spiral_context_get_type() { static GType type = 0; if (!type) { GTypeInfo info = { sizeof(SPSpiralContextClass), NULL, NULL, (GClassInitFunc) sp_spiral_context_class_init, NULL, NULL, sizeof(SPSpiralContext), 4, (GInstanceInitFunc) sp_spiral_context_init, NULL, /* value_table */ }; type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPSpiralContext", &info, (GTypeFlags)0); } return type; } static void sp_spiral_context_class_init(SPSpiralContextClass *klass) { GObjectClass *object_class = (GObjectClass *) klass; SPEventContextClass *event_context_class = (SPEventContextClass *) klass; parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass); object_class->dispose = sp_spiral_context_dispose; event_context_class->setup = sp_spiral_context_setup; event_context_class->set = sp_spiral_context_set; event_context_class->root_handler = sp_spiral_context_root_handler; } static void sp_spiral_context_init(SPSpiralContext *spiral_context) { SPEventContext *event_context = SP_EVENT_CONTEXT(spiral_context); event_context->cursor_shape = cursor_spiral_xpm; event_context->hot_x = 4; event_context->hot_y = 4; event_context->xp = 0; event_context->yp = 0; event_context->tolerance = 0; event_context->within_tolerance = false; event_context->item_to_select = NULL; event_context->shape_repr = NULL; event_context->shape_knot_holder = NULL; spiral_context->item = NULL; spiral_context->revo = 3.0; spiral_context->exp = 1.0; spiral_context->t0 = 0.0; new (&spiral_context->sel_changed_connection) sigc::connection(); } static void sp_spiral_context_dispose(GObject *object) { SPSpiralContext *sc = SP_SPIRAL_CONTEXT(object); SPEventContext *ec = SP_EVENT_CONTEXT(object); ec->enableGrDrag(false); sc->sel_changed_connection.disconnect(); sc->sel_changed_connection.~connection(); /* fixme: This is necessary because we do not grab */ if (sc->item) sp_spiral_finish(sc); if (ec->shape_knot_holder) { sp_knot_holder_destroy(ec->shape_knot_holder); ec->shape_knot_holder = NULL; } if (ec->shape_repr) { // remove old listener sp_repr_remove_listener_by_data(ec->shape_repr, ec); Inkscape::GC::release(ec->shape_repr); ec->shape_repr = 0; } if (sc->_message_context) { delete sc->_message_context; } G_OBJECT_CLASS(parent_class)->dispose(object); } static Inkscape::XML::NodeEventVector ec_shape_repr_events = { NULL, /* child_added */ NULL, /* child_removed */ ec_shape_event_attr_changed, NULL, /* content_changed */ NULL /* order_changed */ }; /** \brief Callback that processes the "changed" signal on the selection; destroys old and creates new knotholder */ void sp_spiral_context_selection_changed(Inkscape::Selection *selection, gpointer data) { SPSpiralContext *sc = SP_SPIRAL_CONTEXT(data); SPEventContext *ec = SP_EVENT_CONTEXT(sc); if (ec->shape_knot_holder) { // desktroy knotholder sp_knot_holder_destroy(ec->shape_knot_holder); ec->shape_knot_holder = NULL; } if (ec->shape_repr) { // remove old listener sp_repr_remove_listener_by_data(ec->shape_repr, ec); Inkscape::GC::release(ec->shape_repr); ec->shape_repr = 0; } SPItem *item = selection->singleItem(); if (item) { ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop); Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item); if (shape_repr) { ec->shape_repr = shape_repr; Inkscape::GC::anchor(shape_repr); sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec); } } } static void sp_spiral_context_setup(SPEventContext *ec) { SPSpiralContext *sc = SP_SPIRAL_CONTEXT(ec); if (((SPEventContextClass *) parent_class)->setup) ((SPEventContextClass *) parent_class)->setup(ec); sp_event_context_read(ec, "expansion"); sp_event_context_read(ec, "revolution"); sp_event_context_read(ec, "t0"); Inkscape::Selection *selection = sp_desktop_selection(ec->desktop); SPItem *item = selection->singleItem(); if (item) { ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop); Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item); if (shape_repr) { ec->shape_repr = shape_repr; Inkscape::GC::anchor(shape_repr); sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec); } } sc->sel_changed_connection.disconnect(); sc->sel_changed_connection = selection->connectChanged(sigc::bind(sigc::ptr_fun(&sp_spiral_context_selection_changed), (gpointer)sc)); if (prefs_get_int_attribute("tools.shapes", "selcue", 0) != 0) { ec->enableSelectionCue(); } if (prefs_get_int_attribute("tools.shapes", "gradientdrag", 0) != 0) { ec->enableGrDrag(); } sc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack()); } static void sp_spiral_context_set(SPEventContext *ec, gchar const *key, gchar const *val) { SPSpiralContext *sc = SP_SPIRAL_CONTEXT(ec); if (!strcmp(key, "expansion")) { sc->exp = (val) ? g_ascii_strtod(val, NULL) : 1.0; sc->exp = CLAMP(sc->exp, 0.0, 1000.0); } else if (!strcmp(key, "revolution")) { sc->revo = (val) ? g_ascii_strtod(val, NULL) : 3.0; sc->revo = CLAMP(sc->revo, 0.05, 40.0); } else if (!strcmp(key, "t0")) { sc->t0 = (val) ? g_ascii_strtod(val, NULL) : 0.0; sc->t0 = CLAMP(sc->t0, 0.0, 0.999); } } static gint sp_spiral_context_root_handler(SPEventContext *event_context, GdkEvent *event) { static gboolean dragging; SPDesktop *desktop = event_context->desktop; Inkscape::Selection *selection = sp_desktop_selection (desktop); SPSpiralContext *sc = SP_SPIRAL_CONTEXT(event_context); event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100); gint ret = FALSE; switch (event->type) { case GDK_BUTTON_PRESS: if (event->button.button == 1 && !event_context->space_panning) { dragging = TRUE; sc->center = Inkscape::setup_for_drag_start(desktop, event_context, event); SnapManager const &m = desktop->namedview->snap_manager; sc->center = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, sc->center, sc->item).getPoint(); sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate), ( GDK_KEY_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK ), NULL, event->button.time); ret = TRUE; } break; case GDK_MOTION_NOTIFY: if (dragging && (event->motion.state & GDK_BUTTON1_MASK) && !event_context->space_panning) { if ( event_context->within_tolerance && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance ) && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) { break; // do not drag if we're within tolerance from origin } // Once the user has moved farther than tolerance from the original location // (indicating they intend to draw, not click), then always process the // motion notify coordinates as given (no snapping back to origin) event_context->within_tolerance = false; NR::Point const motion_w(event->motion.x, event->motion.y); NR::Point motion_dt(event_context->desktop->w2d(motion_w)); SnapManager const &m = desktop->namedview->snap_manager; motion_dt = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, motion_dt, sc->item).getPoint(); sp_spiral_drag(sc, motion_dt, event->motion.state); gobble_motion_events(GDK_BUTTON1_MASK); ret = TRUE; } break; case GDK_BUTTON_RELEASE: event_context->xp = event_context->yp = 0; if (event->button.button == 1 && !event_context->space_panning) { dragging = FALSE; if (!event_context->within_tolerance) { // we've been dragging, finish the spiral sp_spiral_finish(sc); } else if (event_context->item_to_select) { // no dragging, select clicked item if any if (event->button.state & GDK_SHIFT_MASK) { selection->toggle(event_context->item_to_select); } else { selection->set(event_context->item_to_select); } } else { // click in an empty space selection->clear(); } event_context->item_to_select = NULL; ret = TRUE; sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), event->button.time); } break; case GDK_KEY_PRESS: switch (get_group0_keyval(&event->key)) { case GDK_Alt_R: case GDK_Control_L: case GDK_Control_R: case GDK_Shift_L: case GDK_Shift_R: case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine) case GDK_Meta_R: sp_event_show_modifier_tip(event_context->defaultMessageContext(), event, _("<b>Ctrl</b>: snap angle"), NULL, _("<b>Alt</b>: lock spiral radius")); break; case GDK_Up: case GDK_Down: case GDK_KP_Up: case GDK_KP_Down: // prevent the zoom field from activation if (!MOD__CTRL_ONLY) ret = TRUE; break; case GDK_x: case GDK_X: if (MOD__ALT_ONLY) { desktop->setToolboxFocusTo ("altx-spiral"); ret = TRUE; } break; case GDK_Escape: sp_desktop_selection(desktop)->clear(); //TODO: make dragging escapable by Esc break; case GDK_space: if (dragging) { sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), event->button.time); dragging = false; if (!event_context->within_tolerance) { // we've been dragging, finish the rect sp_spiral_finish(sc); } // do not return true, so that space would work switching to selector } break; default: break; } break; case GDK_KEY_RELEASE: switch (get_group0_keyval(&event->key)) { case GDK_Alt_L: case GDK_Alt_R: case GDK_Control_L: case GDK_Control_R: case GDK_Shift_L: case GDK_Shift_R: case GDK_Meta_L: // Meta is when you press Shift+Alt case GDK_Meta_R: event_context->defaultMessageContext()->clear(); break; default: break; } break; default: break; } if (!ret) { if (((SPEventContextClass *) parent_class)->root_handler) ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event); } return ret; } static void sp_spiral_drag(SPSpiralContext *sc, NR::Point p, guint state) { SPDesktop *desktop = SP_EVENT_CONTEXT(sc)->desktop; int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12); if (!sc->item) { if (Inkscape::have_viable_layer(desktop, sc->_message_context) == false) { return; } /* Create object */ Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(sc)); Inkscape::XML::Node *repr = xml_doc->createElement("svg:path"); repr->setAttribute("sodipodi:type", "spiral"); /* Set style */ sp_desktop_apply_style_tool(desktop, repr, "tools.shapes.spiral", false); sc->item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr); Inkscape::GC::release(repr); sc->item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer()); sc->item->updateRepr(); sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5); } NR::Point const p0 = sp_desktop_dt2root_xy_point(desktop, sc->center); NR::Point p1 = sp_desktop_dt2root_xy_point(desktop, p); SnapManager const &m = desktop->namedview->snap_manager; p1 = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, p1, sc->item).getPoint(); SPSpiral *spiral = SP_SPIRAL(sc->item); NR::Point const delta = p1 - p0; gdouble const rad = NR::L2(delta); gdouble arg = NR::atan2(delta) - 2.0*M_PI*spiral->revo; if (state & GDK_CONTROL_MASK) { arg = sp_round(arg, M_PI/snaps); } /* Fixme: these parameters should be got from dialog box */ sp_spiral_position_set(spiral, p0[NR::X], p0[NR::Y], /*expansion*/ sc->exp, /*revolution*/ sc->revo, rad, arg, /*t0*/ sc->t0); /* status text */ GString *rads = SP_PX_TO_METRIC_STRING(rad, desktop->namedview->getDefaultMetric()); sc->_message_context->setF(Inkscape::IMMEDIATE_MESSAGE, _("<b>Spiral</b>: radius %s, angle %5g°; with <b>Ctrl</b> to snap angle"), rads->str, sp_round((arg + 2.0*M_PI*spiral->revo)*180/M_PI, 0.0001)); g_string_free(rads, FALSE); } static void sp_spiral_finish(SPSpiralContext *sc) { sc->_message_context->clear(); if (sc->item != NULL) { SPDesktop *desktop = SP_EVENT_CONTEXT(sc)->desktop; SPSpiral *spiral = SP_SPIRAL(sc->item); sp_shape_set_shape(SP_SHAPE(spiral)); SP_OBJECT(spiral)->updateRepr(SP_OBJECT_WRITE_EXT); sp_canvas_end_forced_full_redraws(desktop->canvas); sp_desktop_selection(desktop)->set(sc->item); sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_SPIRAL, _("Create spiral")); sc->item = NULL; } } /* 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 :