#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 "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 "preferences.h" #include "context-fns.h" #include "shape-editor.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_finish(SPEventContext *ec); static void sp_spiral_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val); static gint sp_spiral_context_root_handler(SPEventContext *event_context, GdkEvent *event); static void sp_spiral_drag(SPSpiralContext *sc, Geom::Point p, guint state); static void sp_spiral_finish(SPSpiralContext *sc); static void sp_spiral_cancel(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->finish = sp_spiral_context_finish; 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; 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_finish(SPEventContext *ec) { SPSpiralContext *sc = SP_SPIRAL_CONTEXT(ec); SPDesktop *desktop = ec->desktop; sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), GDK_CURRENT_TIME); sp_spiral_finish(sc); sc->sel_changed_connection.disconnect(); if (((SPEventContextClass *) parent_class)->finish) { ((SPEventContextClass *) parent_class)->finish(ec); } } 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(); delete ec->shape_editor; ec->shape_editor = NULL; /* fixme: This is necessary because we do not grab */ if (sc->item) sp_spiral_finish(sc); if (sc->_message_context) { delete sc->_message_context; } G_OBJECT_CLASS(parent_class)->dispose(object); } /** \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); ec->shape_editor->unset_item(SH_KNOTHOLDER); SPItem *item = selection->singleItem(); ec->shape_editor->set_item(item, SH_KNOTHOLDER); } 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"); ec->shape_editor = new ShapeEditor(ec->desktop); SPItem *item = sp_desktop_selection(ec->desktop)->singleItem(); if (item) { ec->shape_editor->set_item(item, SH_KNOTHOLDER); } Inkscape::Selection *selection = sp_desktop_selection(ec->desktop); sc->sel_changed_connection.disconnect(); sc->sel_changed_connection = selection->connectChanged(sigc::bind(sigc::ptr_fun(&sp_spiral_context_selection_changed), (gpointer)sc)); Inkscape::Preferences *prefs = Inkscape::Preferences::get(); if (prefs->getBool("/tools/shapes/selcue")) { ec->enableSelectionCue(); } if (prefs->getBool("/tools/shapes/gradientdrag")) { ec->enableGrDrag(); } sc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack()); } static void sp_spiral_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val) { SPSpiralContext *sc = SP_SPIRAL_CONTEXT(ec); Glib::ustring name = val->getEntryName(); if (name == "expansion") { sc->exp = CLAMP(val->getDouble(), 0.0, 1000.0); } else if (name == "revolution") { sc->revo = CLAMP(val->getDouble(3.0), 0.05, 40.0); } else if (name == "t0") { sc->t0 = CLAMP(val->getDouble(), 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); Inkscape::Preferences *prefs = Inkscape::Preferences::get(); event_context->tolerance = prefs->getIntLimited("/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 &m = desktop->namedview->snap_manager; m.setup(desktop); m.freeSnapReturnByRef(sc->center, Inkscape::SNAPSOURCE_NODE_HANDLE); sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate), ( GDK_KEY_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_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; Geom::Point const motion_w(event->motion.x, event->motion.y); Geom::Point motion_dt(event_context->desktop->w2d(motion_w)); SnapManager &m = desktop->namedview->snap_manager; m.setup(desktop, true, sc->item); m.freeSnapReturnByRef(motion_dt, Inkscape::SNAPSOURCE_NODE_HANDLE); sp_spiral_drag(sc, from_2geom(motion_dt), event->motion.state); gobble_motion_events(GDK_BUTTON1_MASK); ret = TRUE; } else if (!sp_event_context_knot_mouseover(sc)) { SnapManager &m = desktop->namedview->snap_manager; m.setup(desktop); Geom::Point const motion_w(event->motion.x, event->motion.y); Geom::Point motion_dt(desktop->w2d(motion_w)); m.preSnap(Inkscape::SnapCandidatePoint(motion_dt, Inkscape::SNAPSOURCE_NODE_HANDLE)); } break; case GDK_BUTTON_RELEASE: event_context->xp = event_context->yp = 0; if (event->button.button == 1 && !event_context->space_panning) { dragging = FALSE; sp_event_context_discard_delayed_snap_event(event_context); 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: if (dragging) { dragging = false; sp_event_context_discard_delayed_snap_event(event_context); // if drawing, cancel, otherwise pass it up for deselecting sp_spiral_cancel(sc); ret = TRUE; } break; case GDK_space: if (dragging) { sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), event->button.time); dragging = false; sp_event_context_discard_delayed_snap_event(event_context); if (!event_context->within_tolerance) { // we've been dragging, finish the spiral 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, Geom::Point p, guint state) { SPDesktop *desktop = SP_EVENT_CONTEXT(sc)->desktop; Inkscape::Preferences *prefs = Inkscape::Preferences::get(); int const snaps = prefs->getInt("/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_i2doc_affine(SP_ITEM(desktop->currentLayer())).inverse(); sc->item->updateRepr(); sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5); } SnapManager &m = desktop->namedview->snap_manager; m.setup(desktop, true, sc->item); Geom::Point pt2g = to_2geom(p); m.freeSnapReturnByRef(pt2g, Inkscape::SNAPSOURCE_NODE_HANDLE); Geom::Point const p0 = desktop->dt2doc(sc->center); Geom::Point const p1 = desktop->dt2doc(pt2g); SPSpiral *spiral = SP_SPIRAL(sc->item); Geom::Point const delta = p1 - p0; gdouble const rad = Geom::L2(delta); gdouble arg = Geom::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[Geom::X], p0[Geom::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) { SPSpiral *spiral = SP_SPIRAL(sc->item); if (spiral->rad == 0) { sp_spiral_cancel(sc); // Don't allow the creating of zero sized spiral, for example when the start and and point snap to the snap grid point return; } SPDesktop *desktop = SP_EVENT_CONTEXT(sc)->desktop; 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; } } static void sp_spiral_cancel(SPSpiralContext *sc) { SPDesktop *desktop = SP_EVENT_CONTEXT(sc)->desktop; sp_desktop_selection(desktop)->clear(); sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), 0); if (sc->item != NULL) { SP_OBJECT(sc->item)->deleteObject(); sc->item = NULL; } sc->within_tolerance = false; sc->xp = 0; sc->yp = 0; sc->item_to_select = NULL; sp_canvas_end_forced_full_redraws(desktop->canvas); sp_document_cancel(sp_desktop_document(desktop)); } /* 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 :