Moved and renamed some tool-related files.

(bzr r12785)

1 files changed, 0 insertions, 1404 deletions

diff --git a/src/pen-context.cpp b/src/pen-context.cpp
deleted file mode 100644
index 726034fac..000000000
--- a/src/pen-context.cpp
+++ /dev/null
@@ -1,1404 +0,0 @@
-/** \file
- * Pen event context implementation.
- */
-
-/*
- * Authors:
- *   Lauris Kaplinski <lauris@kaplinski.com>
- *   bulia byak <buliabyak@users.sf.net>
- *   Jon A. Cruz <jon@joncruz.org>
- *
- * Copyright (C) 2000 Lauris Kaplinski
- * Copyright (C) 2000-2001 Ximian, Inc.
- * Copyright (C) 2002 Lauris Kaplinski
- * Copyright (C) 2004 Monash University
- *
- * Released under GNU GPL, read the file 'COPYING' for more information
- */
-
-#include <gdk/gdkkeysyms.h>
-#include <cstring>
-#include <string>
-
-#include "pen-context.h"
-#include "sp-namedview.h"
-#include "desktop.h"
-#include "desktop-handles.h"
-#include "selection.h"
-#include "selection-chemistry.h"
-#include "draw-anchor.h"
-#include "message-stack.h"
-#include "message-context.h"
-#include "preferences.h"
-#include "sp-path.h"
-#include "display/sp-canvas.h"
-#include "display/curve.h"
-#include "pixmaps/cursor-pen.xpm"
-#include "display/canvas-bpath.h"
-#include "display/sp-ctrlline.h"
-#include "display/sodipodi-ctrl.h"
-#include <glibmm/i18n.h>
-#include "macros.h"
-#include "context-fns.h"
-#include "tools-switch.h"
-#include "ui/control-manager.h"
-#include "tool-factory.h"
-
-using Inkscape::ControlManager;
-
-namespace Inkscape {
-namespace UI {
-namespace Tools {
-
-static void spdc_pen_set_initial_point(PenTool *pc, Geom::Point const p);
-static void spdc_pen_set_subsequent_point(PenTool *const pc, Geom::Point const p, bool statusbar, guint status = 0);
-static void spdc_pen_set_ctrl(PenTool *pc, Geom::Point const p, guint state);
-static void spdc_pen_finish_segment(PenTool *pc, Geom::Point p, guint state);
-
-static void spdc_pen_finish(PenTool *pc, gboolean closed);
-
-static gint pen_handle_button_press(PenTool *const pc, GdkEventButton const &bevent);
-static gint pen_handle_motion_notify(PenTool *const pc, GdkEventMotion const &mevent);
-static gint pen_handle_button_release(PenTool *const pc, GdkEventButton const &revent);
-static gint pen_handle_2button_press(PenTool *const pc, GdkEventButton const &bevent);
-static gint pen_handle_key_press(PenTool *const pc, GdkEvent *event);
-static void spdc_reset_colors(PenTool *pc);
-
-static void pen_disable_events(PenTool *const pc);
-static void pen_enable_events(PenTool *const pc);
-
-static Geom::Point pen_drag_origin_w(0, 0);
-static bool pen_within_tolerance = false;
-
-static int pen_next_paraxial_direction(const PenTool *const pc, Geom::Point const &pt, Geom::Point const &origin, guint state);
-static void pen_set_to_nearest_horiz_vert(const PenTool *const pc, Geom::Point &pt, guint const state, bool snap);
-
-static int pen_last_paraxial_dir = 0; // last used direction in horizontal/vertical mode; 0 = horizontal, 1 = vertical
-
-namespace {
-	ToolBase* createPenContext() {
-		return new PenTool();
-	}
-
-	bool penContextRegistered = ToolFactory::instance().registerObject("/tools/freehand/pen", createPenContext);
-}
-
-const std::string& PenTool::getPrefsPath() {
-	return PenTool::prefsPath;
-}
-
-const std::string PenTool::prefsPath = "/tools/freehand/pen";
-
-PenTool::PenTool() : SPDrawContext() {
-	this->polylines_only = false;
-	this->polylines_paraxial = false;
-	this->expecting_clicks_for_LPE = 0;
-
-    this->cursor_shape = cursor_pen_xpm;
-    this->hot_x = 4;
-    this->hot_y = 4;
-
-    this->npoints = 0;
-    this->mode = MODE_CLICK;
-    this->state = POINT;
-
-    this->c0 = NULL;
-    this->c1 = NULL;
-    this->cl0 = NULL;
-    this->cl1 = NULL;
-
-    this->events_disabled = 0;
-
-    this->num_clicks = 0;
-    this->waiting_LPE = NULL;
-    this->waiting_item = NULL;
-}
-
-PenTool::~PenTool() {
-    if (this->c0) {
-        sp_canvas_item_destroy(this->c0);
-        this->c0 = NULL;
-    }
-    if (this->c1) {
-        sp_canvas_item_destroy(this->c1);
-        this->c1 = NULL;
-    }
-    if (this->cl0) {
-        sp_canvas_item_destroy(this->cl0);
-        this->cl0 = NULL;
-    }
-    if (this->cl1) {
-        sp_canvas_item_destroy(this->cl1);
-        this->cl1 = NULL;
-    }
-
-    if (this->expecting_clicks_for_LPE > 0) {
-        // we received too few clicks to sanely set the parameter path so we remove the LPE from the item
-        this->waiting_item->removeCurrentPathEffect(false);
-    }
-}
-
-void sp_pen_context_set_polyline_mode(PenTool *const pc) {
-    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-    guint mode = prefs->getInt("/tools/freehand/pen/freehand-mode", 0);
-    pc->polylines_only = (mode == 2 || mode == 3);
-    pc->polylines_paraxial = (mode == 3);
-}
-
-/**
- * Callback to initialize PenTool object.
- */
-void PenTool::setup() {
-    SPDrawContext::setup();
-
-    ControlManager &mgr = ControlManager::getManager();
-
-    // Pen indicators
-    this->c0 = mgr.createControl(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(this)), Inkscape::CTRL_TYPE_ADJ_HANDLE);
-    mgr.track(this->c0);
-
-    this->c1 = mgr.createControl(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(this)), Inkscape::CTRL_TYPE_ADJ_HANDLE);
-    mgr.track(this->c1);
-
-    this->cl0 = mgr.createControlLine(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(this)));
-    this->cl1 = mgr.createControlLine(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(this)));
-
-    sp_canvas_item_hide(this->c0);
-    sp_canvas_item_hide(this->c1);
-    sp_canvas_item_hide(this->cl0);
-    sp_canvas_item_hide(this->cl1);
-
-    sp_event_context_read(this, "mode");
-
-    this->anchor_statusbar = false;
-
-    sp_pen_context_set_polyline_mode(this);
-
-    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-    if (prefs->getBool("/tools/freehand/pen/selcue")) {
-        this->enableSelectionCue();
-    }
-}
-
-static void pen_cancel (PenTool *const pc)
-{
-    pc->num_clicks = 0;
-    pc->state = PenTool::STOP;
-    spdc_reset_colors(pc);
-    sp_canvas_item_hide(pc->c0);
-    sp_canvas_item_hide(pc->c1);
-    sp_canvas_item_hide(pc->cl0);
-    sp_canvas_item_hide(pc->cl1);
-    pc->message_context->clear();
-    pc->message_context->flash(Inkscape::NORMAL_MESSAGE, _("Drawing cancelled"));
-
-    pc->desktop->canvas->endForcedFullRedraws();
-}
-
-/**
- * Finalization callback.
- */
-void PenTool::finish() {
-    sp_event_context_discard_delayed_snap_event(this);
-
-    if (this->npoints != 0) {
-        pen_cancel(this);
-    }
-
-    SPDrawContext::finish();
-}
-
-/**
- * Callback that sets key to value in pen context.
- */
-void PenTool::set(const Inkscape::Preferences::Entry& val) {
-    Glib::ustring name = val.getEntryName();
-
-    if (name == "mode") {
-        if ( val.getString() == "drag" ) {
-            this->mode = MODE_DRAG;
-        } else {
-            this->mode = MODE_CLICK;
-        }
-    }
-}
-
-/**
- * Snaps new node relative to the previous node.
- */
-static void spdc_endpoint_snap(PenTool const *const pc, Geom::Point &p, guint const state)
-{
-    if ((state & GDK_CONTROL_MASK) && !pc->polylines_paraxial) { //CTRL enables angular snapping
-        if (pc->npoints > 0) {
-            spdc_endpoint_snap_rotation(pc, p, pc->p[0], state);
-        }
-    } else {
-        // We cannot use shift here to disable snapping because the shift-key is already used
-        // to toggle the paraxial direction; if the user wants to disable snapping (s)he will
-        // have to use the %-key, the menu, or the snap toolbar
-        if ((pc->npoints > 0) && pc->polylines_paraxial) {
-            // snap constrained
-            pen_set_to_nearest_horiz_vert(pc, p, state, true);
-        } else {
-            // snap freely
-            boost::optional<Geom::Point> origin = pc->npoints > 0 ? pc->p[0] : boost::optional<Geom::Point>();
-            spdc_endpoint_snap_free(pc, p, origin, state); // pass the origin, to allow for perpendicular / tangential snapping
-        }
-    }
-}
-
-/**
- * Snaps new node's handle relative to the new node.
- */
-static void spdc_endpoint_snap_handle(PenTool const *const pc, Geom::Point &p, guint const state)
-{
-    g_return_if_fail(( pc->npoints == 2 ||
-                       pc->npoints == 5   ));
-
-    if ((state & GDK_CONTROL_MASK)) { //CTRL enables angular snapping
-        spdc_endpoint_snap_rotation(pc, p, pc->p[pc->npoints - 2], state);
-    } else {
-        if (!(state & GDK_SHIFT_MASK)) { //SHIFT disables all snapping, except the angular snapping above
-            boost::optional<Geom::Point> origin = pc->p[pc->npoints - 2];
-            spdc_endpoint_snap_free(pc, p, origin, state);
-        }
-    }
-}
-
-bool PenTool::item_handler(SPItem* item, GdkEvent* event) {
-    gint ret = FALSE;
-
-    switch (event->type) {
-        case GDK_BUTTON_PRESS:
-            ret = pen_handle_button_press(this, event->button);
-            break;
-        case GDK_BUTTON_RELEASE:
-            ret = pen_handle_button_release(this, event->button);
-            break;
-        default:
-            break;
-    }
-
-    if (!ret) {
-    	ret = SPDrawContext::item_handler(item, event);
-    }
-
-    return ret;
-}
-
-/**
- * Callback to handle all pen events.
- */
-bool PenTool::root_handler(GdkEvent* event) {
-    gint ret = FALSE;
-
-    switch (event->type) {
-        case GDK_BUTTON_PRESS:
-            ret = pen_handle_button_press(this, event->button);
-            break;
-
-        case GDK_MOTION_NOTIFY:
-            ret = pen_handle_motion_notify(this, event->motion);
-            break;
-
-        case GDK_BUTTON_RELEASE:
-            ret = pen_handle_button_release(this, event->button);
-            break;
-
-        case GDK_2BUTTON_PRESS:
-            ret = pen_handle_2button_press(this, event->button);
-            break;
-
-        case GDK_KEY_PRESS:
-            ret = pen_handle_key_press(this, event);
-            break;
-
-        default:
-            break;
-    }
-
-    if (!ret) {
-    	ret = SPDrawContext::root_handler(event);
-    }
-
-    return ret;
-}
-
-/**
- * Handle mouse button press event.
- */
-static gint pen_handle_button_press(PenTool *const pc, GdkEventButton const &bevent)
-{
-    if (pc->events_disabled) {
-        // skip event processing if events are disabled
-        return FALSE;
-    }
-
-    SPDrawContext * const dc = SP_DRAW_CONTEXT(pc);
-    SPDesktop * const desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
-    Geom::Point const event_w(bevent.x, bevent.y);
-    Geom::Point event_dt(desktop->w2d(event_w));
-    ToolBase *event_context = SP_EVENT_CONTEXT(pc);
-
-    gint ret = FALSE;
-    if (bevent.button == 1 && !event_context->space_panning
-        // make sure this is not the last click for a waiting LPE (otherwise we want to finish the path)
-        && pc->expecting_clicks_for_LPE != 1) {
-
-        if (Inkscape::have_viable_layer(desktop, dc->message_context) == false) {
-            return TRUE;
-        }
-
-        if (!pc->grab ) {
-            // Grab mouse, so release will not pass unnoticed
-            pc->grab = SP_CANVAS_ITEM(desktop->acetate);
-            sp_canvas_item_grab(pc->grab, ( GDK_KEY_PRESS_MASK | GDK_BUTTON_PRESS_MASK   |
-                                            GDK_BUTTON_RELEASE_MASK |
-                                            GDK_POINTER_MOTION_MASK  ),
-                                NULL, bevent.time);
-        }
-
-        pen_drag_origin_w = event_w;
-        pen_within_tolerance = true;
-
-        // Test whether we hit any anchor.
-        SPDrawAnchor * const anchor = spdc_test_inside(pc, event_w);
-
-        switch (pc->mode) {
-            case PenTool::MODE_CLICK:
-                // In click mode we add point on release
-                switch (pc->state) {
-                    case PenTool::POINT:
-                    case PenTool::CONTROL:
-                    case PenTool::CLOSE:
-                        break;
-                    case PenTool::STOP:
-                        // This is allowed, if we just canceled curve
-                        pc->state = PenTool::POINT;
-                        break;
-                    default:
-                        break;
-                }
-                break;
-            case PenTool::MODE_DRAG:
-                switch (pc->state) {
-                    case PenTool::STOP:
-                        // This is allowed, if we just canceled curve
-                    case PenTool::POINT:
-                        if (pc->npoints == 0) {
-
-                            Geom::Point p;
-                            if ((bevent.state & GDK_CONTROL_MASK) && (pc->polylines_only || pc->polylines_paraxial)) {
-                                p = event_dt;
-                                if (!(bevent.state & GDK_SHIFT_MASK)) {
-                                    SnapManager &m = desktop->namedview->snap_manager;
-                                    m.setup(desktop);
-                                    m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_NODE_HANDLE);
-                                    m.unSetup();
-                                }
-                              spdc_create_single_dot(event_context, p, "/tools/freehand/pen", bevent.state);
-                              ret = TRUE;
-                              break;
-                            }
-
-                            // TODO: Perhaps it would be nicer to rearrange the following case
-                            // distinction so that the case of a waiting LPE is treated separately
-
-                            // Set start anchor
-                            pc->sa = anchor;
-                            if (anchor && !sp_pen_context_has_waiting_LPE(pc)) {
-                                // Adjust point to anchor if needed; if we have a waiting LPE, we need
-                                // a fresh path to be created so don't continue an existing one
-                                p = anchor->dp;
-                                desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Continuing selected path"));
-                            } else {
-                                // This is the first click of a new curve; deselect item so that
-                                // this curve is not combined with it (unless it is drawn from its
-                                // anchor, which is handled by the sibling branch above)
-                                Inkscape::Selection * const selection = sp_desktop_selection(desktop);
-                                if (!(bevent.state & GDK_SHIFT_MASK) || sp_pen_context_has_waiting_LPE(pc)) {
-                                    // if we have a waiting LPE, we need a fresh path to be created
-                                    // so don't append to an existing one
-                                    selection->clear();
-                                    desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new path"));
-                                } else if (selection->singleItem() && SP_IS_PATH(selection->singleItem())) {
-                                    desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Appending to selected path"));
-                                }
-
-                                // Create green anchor
-                                p = event_dt;
-                                spdc_endpoint_snap(pc, p, bevent.state);
-                                pc->green_anchor = sp_draw_anchor_new(pc, pc->green_curve, TRUE, p);
-                            }
-                            spdc_pen_set_initial_point(pc, p);
-                        } else {
-
-                            // Set end anchor
-                            pc->ea = anchor;
-                            Geom::Point p;
-                            if (anchor) {
-                                p = anchor->dp;
-                                // we hit an anchor, will finish the curve (either with or without closing)
-                                // in release handler
-                                pc->state = PenTool::CLOSE;
-
-                                if (pc->green_anchor && pc->green_anchor->active) {
-                                    // we clicked on the current curve start, so close it even if
-                                    // we drag a handle away from it
-                                    dc->green_closed = TRUE;
-                                }
-                                ret = TRUE;
-                                break;
-
-                            } else {
-                                p = event_dt;
-                                spdc_endpoint_snap(pc, p, bevent.state); // Snap node only if not hitting anchor.
-                                spdc_pen_set_subsequent_point(pc, p, true);
-                            }
-                        }
-
-                        pc->state = pc->polylines_only ? PenTool::POINT : PenTool::CONTROL;
-                        ret = TRUE;
-                        break;
-                    case PenTool::CONTROL:
-                        g_warning("Button down in CONTROL state");
-                        break;
-                    case PenTool::CLOSE:
-                        g_warning("Button down in CLOSE state");
-                        break;
-                    default:
-                        break;
-                }
-                break;
-            default:
-                break;
-        }
-    } else if (pc->expecting_clicks_for_LPE == 1 && pc->npoints != 0) {
-        // when the last click for a waiting LPE occurs we want to finish the path
-        spdc_pen_finish_segment(pc, event_dt, bevent.state);
-        if (pc->green_closed) {
-            // finishing at the start anchor, close curve
-            spdc_pen_finish(pc, TRUE);
-        } else {
-            // finishing at some other anchor, finish curve but not close
-            spdc_pen_finish(pc, FALSE);
-        }
-
-        ret = TRUE;
-    } else if (bevent.button == 3 && pc->npoints != 0) {
-        // right click - finish path
-        spdc_pen_finish(pc, FALSE);
-        ret = TRUE;
-    }
-
-    if (pc->expecting_clicks_for_LPE > 0) {
-        --pc->expecting_clicks_for_LPE;
-    }
-
-    return ret;
-}
-
-/**
- * Handle motion_notify event.
- */
-static gint pen_handle_motion_notify(PenTool *const pc, GdkEventMotion const &mevent)
-{
-    gint ret = FALSE;
-
-    ToolBase *event_context = SP_EVENT_CONTEXT(pc);
-    SPDesktop * const dt = SP_EVENT_CONTEXT_DESKTOP(event_context);
-
-    if (event_context->space_panning || mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
-        // allow scrolling
-        return FALSE;
-    }
-
-    if (pc->events_disabled) {
-        // skip motion events if pen events are disabled
-        return FALSE;
-    }
-
-    Geom::Point const event_w(mevent.x,
-                            mevent.y);
-    if (pen_within_tolerance) {
-        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-        gint const tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
-        if ( Geom::LInfty( event_w - pen_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)
-    pen_within_tolerance = false;
-
-    // Find desktop coordinates
-    Geom::Point p = dt->w2d(event_w);
-
-    // Test, whether we hit any anchor
-    SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
-
-    switch (pc->mode) {
-        case PenTool::MODE_CLICK:
-            switch (pc->state) {
-                case PenTool::POINT:
-                    if ( pc->npoints != 0 ) {
-                        // Only set point, if we are already appending
-                        spdc_endpoint_snap(pc, p, mevent.state);
-                        spdc_pen_set_subsequent_point(pc, p, true);
-                        ret = TRUE;
-                    } else if (!sp_event_context_knot_mouseover(pc)) {
-                        SnapManager &m = dt->namedview->snap_manager;
-                        m.setup(dt);
-                        m.preSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE));
-                        m.unSetup();
-                    }
-                    break;
-                case PenTool::CONTROL:
-                case PenTool::CLOSE:
-                    // Placing controls is last operation in CLOSE state
-                    spdc_endpoint_snap(pc, p, mevent.state);
-                    spdc_pen_set_ctrl(pc, p, mevent.state);
-                    ret = TRUE;
-                    break;
-                case PenTool::STOP:
-                    // This is perfectly valid
-                    break;
-                default:
-                    break;
-            }
-            break;
-        case PenTool::MODE_DRAG:
-            switch (pc->state) {
-                case PenTool::POINT:
-                    if ( pc->npoints > 0 ) {
-                        // Only set point, if we are already appending
-
-                        if (!anchor) {   // Snap node only if not hitting anchor
-                            spdc_endpoint_snap(pc, p, mevent.state);
-                            spdc_pen_set_subsequent_point(pc, p, true, mevent.state);
-                        } else {
-                            spdc_pen_set_subsequent_point(pc, anchor->dp, false, mevent.state);
-                        }
-
-                        if (anchor && !pc->anchor_statusbar) {
-                            pc->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path."));
-                            pc->anchor_statusbar = true;
-                        } else if (!anchor && pc->anchor_statusbar) {
-                            pc->message_context->clear();
-                            pc->anchor_statusbar = false;
-                        }
-
-                        ret = TRUE;
-                    } else {
-                        if (anchor && !pc->anchor_statusbar) {
-                            pc->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to continue the path from this point."));
-                            pc->anchor_statusbar = true;
-                        } else if (!anchor && pc->anchor_statusbar) {
-                            pc->message_context->clear();
-                            pc->anchor_statusbar = false;
-                        }
-                        if (!sp_event_context_knot_mouseover(pc)) {
-                            SnapManager &m = dt->namedview->snap_manager;
-                            m.setup(dt);
-                            m.preSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE));
-                            m.unSetup();
-                        }
-                    }
-                    break;
-                case PenTool::CONTROL:
-                case PenTool::CLOSE:
-                    // Placing controls is last operation in CLOSE state
-
-                    // snap the handle
-                    spdc_endpoint_snap_handle(pc, p, mevent.state);
-
-                    if (!pc->polylines_only) {
-                        spdc_pen_set_ctrl(pc, p, mevent.state);
-                    } else {
-                        spdc_pen_set_ctrl(pc, pc->p[1], mevent.state);
-                    }
-                    gobble_motion_events(GDK_BUTTON1_MASK);
-                    ret = TRUE;
-                    break;
-                case PenTool::STOP:
-                    // This is perfectly valid
-                    break;
-                default:
-                    if (!sp_event_context_knot_mouseover(pc)) {
-                        SnapManager &m = dt->namedview->snap_manager;
-                        m.setup(dt);
-                        m.preSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE));
-                        m.unSetup();
-                    }
-                    break;
-            }
-            break;
-        default:
-            break;
-    }
-    return ret;
-}
-
-/**
- * Handle mouse button release event.
- */
-static gint pen_handle_button_release(PenTool *const pc, GdkEventButton const &revent)
-{
-    if (pc->events_disabled) {
-        // skip event processing if events are disabled
-        return FALSE;
-    }
-
-    gint ret = FALSE;
-    ToolBase *event_context = SP_EVENT_CONTEXT(pc);
-    if ( revent.button == 1  && !event_context->space_panning) {
-
-        SPDrawContext *dc = SP_DRAW_CONTEXT (pc);
-
-        Geom::Point const event_w(revent.x,
-                                revent.y);
-        // Find desktop coordinates
-        Geom::Point p = pc->desktop->w2d(event_w);
-
-        // Test whether we hit any anchor.
-        SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
-
-        switch (pc->mode) {
-            case PenTool::MODE_CLICK:
-                switch (pc->state) {
-                    case PenTool::POINT:
-                        if ( pc->npoints == 0 ) {
-                            // Start new thread only with button release
-                            if (anchor) {
-                                p = anchor->dp;
-                            }
-                            pc->sa = anchor;
-                            spdc_pen_set_initial_point(pc, p);
-                        } else {
-                            // Set end anchor here
-                            pc->ea = anchor;
-                            if (anchor) {
-                                p = anchor->dp;
-                            }
-                        }
-                        pc->state = PenTool::CONTROL;
-                        ret = TRUE;
-                        break;
-                    case PenTool::CONTROL:
-                        // End current segment
-                        spdc_endpoint_snap(pc, p, revent.state);
-                        spdc_pen_finish_segment(pc, p, revent.state);
-                        pc->state = PenTool::POINT;
-                        ret = TRUE;
-                        break;
-                    case PenTool::CLOSE:
-                        // End current segment
-                        if (!anchor) {   // Snap node only if not hitting anchor
-                            spdc_endpoint_snap(pc, p, revent.state);
-                        }
-                        spdc_pen_finish_segment(pc, p, revent.state);
-                        spdc_pen_finish(pc, TRUE);
-                        pc->state = PenTool::POINT;
-                        ret = TRUE;
-                        break;
-                    case PenTool::STOP:
-                        // This is allowed, if we just canceled curve
-                        pc->state = PenTool::POINT;
-                        ret = TRUE;
-                        break;
-                    default:
-                        break;
-                }
-                break;
-            case PenTool::MODE_DRAG:
-                switch (pc->state) {
-                    case PenTool::POINT:
-                    case PenTool::CONTROL:
-                        spdc_endpoint_snap(pc, p, revent.state);
-                        spdc_pen_finish_segment(pc, p, revent.state);
-                        break;
-                    case PenTool::CLOSE:
-                        spdc_endpoint_snap(pc, p, revent.state);
-                        spdc_pen_finish_segment(pc, p, revent.state);
-                        if (pc->green_closed) {
-                            // finishing at the start anchor, close curve
-                            spdc_pen_finish(pc, TRUE);
-                        } else {
-                            // finishing at some other anchor, finish curve but not close
-                            spdc_pen_finish(pc, FALSE);
-                        }
-                        break;
-                    case PenTool::STOP:
-                        // This is allowed, if we just cancelled curve
-                        break;
-                    default:
-                        break;
-                }
-                pc->state = PenTool::POINT;
-                ret = TRUE;
-                break;
-            default:
-                break;
-        }
-
-        if (pc->grab) {
-            // Release grab now
-            sp_canvas_item_ungrab(pc->grab, revent.time);
-            pc->grab = NULL;
-        }
-
-        ret = TRUE;
-
-        dc->green_closed = FALSE;
-    }
-
-    // TODO: can we be sure that the path was created correctly?
-    // TODO: should we offer an option to collect the clicks in a list?
-    if (pc->expecting_clicks_for_LPE == 0 && sp_pen_context_has_waiting_LPE(pc)) {
-        sp_pen_context_set_polyline_mode(pc);
-
-        ToolBase *ec = SP_EVENT_CONTEXT(pc);
-        Inkscape::Selection *selection = sp_desktop_selection (ec->desktop);
-
-        if (pc->waiting_LPE) {
-            // we have an already created LPE waiting for a path
-            pc->waiting_LPE->acceptParamPath(SP_PATH(selection->singleItem()));
-            selection->add(SP_OBJECT(pc->waiting_item));
-            pc->waiting_LPE = NULL;
-        } else {
-            // the case that we need to create a new LPE and apply it to the just-drawn path is
-            // handled in spdc_check_for_and_apply_waiting_LPE() in draw-context.cpp
-        }
-    }
-
-    return ret;
-}
-
-static gint pen_handle_2button_press(PenTool *const pc, GdkEventButton const &bevent)
-{
-    gint ret = FALSE;
-    // only end on LMB double click. Otherwise horizontal scrolling causes ending of the path
-    if (pc->npoints != 0 && bevent.button == 1) {
-        spdc_pen_finish(pc, FALSE);
-        ret = TRUE;
-    }
-    return ret;
-}
-
-static void pen_redraw_all (PenTool *const pc)
-{
-    // green
-    if (pc->green_bpaths) {
-        // remove old piecewise green canvasitems
-        while (pc->green_bpaths) {
-            sp_canvas_item_destroy(SP_CANVAS_ITEM(pc->green_bpaths->data));
-            pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
-        }
-        // one canvas bpath for all of green_curve
-        SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), pc->green_curve);
-        sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
-        sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cshape), 0, SP_WIND_RULE_NONZERO);
-
-        pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
-    }
-
-    if (pc->green_anchor)
-        SP_CTRL(pc->green_anchor->ctrl)->moveto(pc->green_anchor->dp);
-
-    pc->red_curve->reset();
-    pc->red_curve->moveto(pc->p[0]);
-    pc->red_curve->curveto(pc->p[1], pc->p[2], pc->p[3]);
-    sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
-
-    // handles
-    if (pc->p[0] != pc->p[1]) {
-        SP_CTRL(pc->c1)->moveto(pc->p[1]);
-        pc->cl1->setCoords(pc->p[0], pc->p[1]);
-        sp_canvas_item_show(pc->c1);
-        sp_canvas_item_show(pc->cl1);
-    } else {
-        sp_canvas_item_hide(pc->c1);
-        sp_canvas_item_hide(pc->cl1);
-    }
-
-    Geom::Curve const * last_seg = pc->green_curve->last_segment();
-    if (last_seg) {
-        Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>( last_seg );
-        if ( cubic &&
-             (*cubic)[2] != pc->p[0] )
-        {
-            Geom::Point p2 = (*cubic)[2];
-            SP_CTRL(pc->c0)->moveto(p2);
-            pc->cl0->setCoords(p2, pc->p[0]);
-            sp_canvas_item_show(pc->c0);
-            sp_canvas_item_show(pc->cl0);
-        } else {
-            sp_canvas_item_hide(pc->c0);
-            sp_canvas_item_hide(pc->cl0);
-        }
-    }
-}
-
-static void pen_lastpoint_move (PenTool *const pc, gdouble x, gdouble y)
-{
-    if (pc->npoints != 5)
-        return;
-
-    // green
-    if (!pc->green_curve->is_empty()) {
-        pc->green_curve->last_point_additive_move( Geom::Point(x,y) );
-    } else {
-        // start anchor too
-        if (pc->green_anchor) {
-            pc->green_anchor->dp += Geom::Point(x, y);
-        }
-    }
-
-    // red
-    pc->p[0] += Geom::Point(x, y);
-    pc->p[1] += Geom::Point(x, y);
-    pen_redraw_all(pc);
-}
-
-static void pen_lastpoint_move_screen (PenTool *const pc, gdouble x, gdouble y)
-{
-    pen_lastpoint_move (pc, x / pc->desktop->current_zoom(), y / pc->desktop->current_zoom());
-}
-
-static void pen_lastpoint_tocurve (PenTool *const pc)
-{
-    if (pc->npoints != 5)
-        return;
-
-    Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>( pc->green_curve->last_segment() );
-    if ( cubic ) {
-        pc->p[1] = pc->p[0] + (Geom::Point)( (*cubic)[3] - (*cubic)[2] );
-    } else {
-        pc->p[1] = pc->p[0] + (1./3)*(pc->p[3] - pc->p[0]);
-    }
-
-    pen_redraw_all(pc);
-}
-
-static void pen_lastpoint_toline (PenTool *const pc)
-{
-    if (pc->npoints != 5)
-        return;
-
-    pc->p[1] = pc->p[0];
-
-    pen_redraw_all(pc);
-}
-
-
-static gint pen_handle_key_press(PenTool *const pc, GdkEvent *event)
-{
-
-    gint ret = FALSE;
-    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-    gdouble const nudge = prefs->getDoubleLimited("/options/nudgedistance/value", 2, 0, 1000, "px"); // in px
-
-    switch (get_group0_keyval (&event->key)) {
-
-        case GDK_KEY_Left: // move last point left
-        case GDK_KEY_KP_Left:
-            if (!MOD__CTRL(event)) { // not ctrl
-                if (MOD__ALT(event)) { // alt
-                    if (MOD__SHIFT(event)) pen_lastpoint_move_screen(pc, -10, 0); // shift
-                    else pen_lastpoint_move_screen(pc, -1, 0); // no shift
-                }
-                else { // no alt
-                    if (MOD__SHIFT(event)) pen_lastpoint_move(pc, -10*nudge, 0); // shift
-                    else pen_lastpoint_move(pc, -nudge, 0); // no shift
-                }
-                ret = TRUE;
-            }
-            break;
-        case GDK_KEY_Up: // move last point up
-        case GDK_KEY_KP_Up:
-            if (!MOD__CTRL(event)) { // not ctrl
-                if (MOD__ALT(event)) { // alt
-                    if (MOD__SHIFT(event)) pen_lastpoint_move_screen(pc, 0, 10); // shift
-                    else pen_lastpoint_move_screen(pc, 0, 1); // no shift
-                }
-                else { // no alt
-                    if (MOD__SHIFT(event)) pen_lastpoint_move(pc, 0, 10*nudge); // shift
-                    else pen_lastpoint_move(pc, 0, nudge); // no shift
-                }
-                ret = TRUE;
-            }
-            break;
-        case GDK_KEY_Right: // move last point right
-        case GDK_KEY_KP_Right:
-            if (!MOD__CTRL(event)) { // not ctrl
-                if (MOD__ALT(event)) { // alt
-                    if (MOD__SHIFT(event)) pen_lastpoint_move_screen(pc, 10, 0); // shift
-                    else pen_lastpoint_move_screen(pc, 1, 0); // no shift
-                }
-                else { // no alt
-                    if (MOD__SHIFT(event)) pen_lastpoint_move(pc, 10*nudge, 0); // shift
-                    else pen_lastpoint_move(pc, nudge, 0); // no shift
-                }
-                ret = TRUE;
-            }
-            break;
-        case GDK_KEY_Down: // move last point down
-        case GDK_KEY_KP_Down:
-            if (!MOD__CTRL(event)) { // not ctrl
-                if (MOD__ALT(event)) { // alt
-                    if (MOD__SHIFT(event)) pen_lastpoint_move_screen(pc, 0, -10); // shift
-                    else pen_lastpoint_move_screen(pc, 0, -1); // no shift
-                }
-                else { // no alt
-                    if (MOD__SHIFT(event)) pen_lastpoint_move(pc, 0, -10*nudge); // shift
-                    else pen_lastpoint_move(pc, 0, -nudge); // no shift
-                }
-                ret = TRUE;
-            }
-            break;
-
-/*TODO: this is not yet enabled?? looks like some traces of the Geometry tool
-        case GDK_KEY_P:
-        case GDK_KEY_p:
-            if (MOD__SHIFT_ONLY(event)) {
-                sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::PARALLEL, 2);
-                ret = TRUE;
-            }
-            break;
-
-        case GDK_KEY_C:
-        case GDK_KEY_c:
-            if (MOD__SHIFT_ONLY(event)) {
-                sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::CIRCLE_3PTS, 3);
-                ret = TRUE;
-            }
-            break;
-
-        case GDK_KEY_B:
-        case GDK_KEY_b:
-            if (MOD__SHIFT_ONLY(event)) {
-                sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::PERP_BISECTOR, 2);
-                ret = TRUE;
-            }
-            break;
-
-        case GDK_KEY_A:
-        case GDK_KEY_a:
-            if (MOD__SHIFT_ONLY(event)) {
-                sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::ANGLE_BISECTOR, 3);
-                ret = TRUE;
-            }
-            break;
-*/
-
-        case GDK_KEY_U:
-        case GDK_KEY_u:
-            if (MOD__SHIFT_ONLY(event)) {
-                pen_lastpoint_tocurve(pc);
-                ret = TRUE;
-            }
-            break;
-        case GDK_KEY_L:
-        case GDK_KEY_l:
-            if (MOD__SHIFT_ONLY(event)) {
-                pen_lastpoint_toline(pc);
-                ret = TRUE;
-            }
-            break;
-
-        case GDK_KEY_Return:
-        case GDK_KEY_KP_Enter:
-            if (pc->npoints != 0) {
-                spdc_pen_finish(pc, FALSE);
-                ret = TRUE;
-            }
-            break;
-        case GDK_KEY_Escape:
-            if (pc->npoints != 0) {
-                // if drawing, cancel, otherwise pass it up for deselecting
-                pen_cancel (pc);
-                ret = TRUE;
-            }
-            break;
-        case GDK_KEY_z:
-        case GDK_KEY_Z:
-            if (MOD__CTRL_ONLY(event) && pc->npoints != 0) {
-                // if drawing, cancel, otherwise pass it up for undo
-                pen_cancel (pc);
-                ret = TRUE;
-            }
-            break;
-        case GDK_KEY_g:
-        case GDK_KEY_G:
-            if (MOD__SHIFT_ONLY(event)) {
-                sp_selection_to_guides(SP_EVENT_CONTEXT(pc)->desktop);
-                ret = true;
-            }
-            break;
-        case GDK_KEY_BackSpace:
-        case GDK_KEY_Delete:
-        case GDK_KEY_KP_Delete:
-            if ( pc->green_curve->is_empty() || (pc->green_curve->last_segment() == NULL) ) {
-                if (!pc->red_curve->is_empty()) {
-                    pen_cancel (pc);
-                    ret = TRUE;
-                } else {
-                    // do nothing; this event should be handled upstream
-                }
-            } else {
-                // Reset red curve
-                pc->red_curve->reset();
-                // Destroy topmost green bpath
-                if (pc->green_bpaths) {
-                    if (pc->green_bpaths->data)
-                        sp_canvas_item_destroy(SP_CANVAS_ITEM(pc->green_bpaths->data));
-                    pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
-                }
-                // Get last segment
-                if ( pc->green_curve->is_empty() ) {
-                    g_warning("pen_handle_key_press, case GDK_KP_Delete: Green curve is empty");
-                    break;
-                }
-                // The code below assumes that pc->green_curve has only ONE path !
-                Geom::Curve const * crv = pc->green_curve->last_segment();
-                pc->p[0] = crv->initialPoint();
-                if ( Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>(crv)) {
-                    pc->p[1] = (*cubic)[1];
-                } else {
-                    pc->p[1] = pc->p[0];
-                }
-                Geom::Point const pt(( pc->npoints < 4
-                                     ? (Geom::Point)(crv->finalPoint())
-                                     : pc->p[3] ));
-                pc->npoints = 2;
-                pc->green_curve->backspace();
-                sp_canvas_item_hide(pc->c0);
-                sp_canvas_item_hide(pc->c1);
-                sp_canvas_item_hide(pc->cl0);
-                sp_canvas_item_hide(pc->cl1);
-                pc->state = PenTool::POINT;
-                spdc_pen_set_subsequent_point(pc, pt, true);
-                pen_last_paraxial_dir = !pen_last_paraxial_dir;
-                ret = TRUE;
-            }
-            break;
-        default:
-            break;
-    }
-    return ret;
-}
-
-static void spdc_reset_colors(PenTool *pc)
-{
-    // Red
-    pc->red_curve->reset();
-    sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
-    // Blue
-    pc->blue_curve->reset();
-    sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->blue_bpath), NULL);
-    // Green
-    while (pc->green_bpaths) {
-        sp_canvas_item_destroy(SP_CANVAS_ITEM(pc->green_bpaths->data));
-        pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
-    }
-    pc->green_curve->reset();
-    if (pc->green_anchor) {
-        pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
-    }
-    pc->sa = NULL;
-    pc->ea = NULL;
-    pc->npoints = 0;
-    pc->red_curve_is_valid = false;
-}
-
-
-static void spdc_pen_set_initial_point(PenTool *const pc, Geom::Point const p)
-{
-    g_assert( pc->npoints == 0 );
-
-    pc->p[0] = p;
-    pc->p[1] = p;
-    pc->npoints = 2;
-    sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
-
-    pc->desktop->canvas->forceFullRedrawAfterInterruptions(5);
-}
-
-/**
- * Show the status message for the current line/curve segment.
- * This type of message always shows angle/distance as the last
- * two parameters ("angle %3.2f&#176;, distance %s").
- */
-static void spdc_pen_set_angle_distance_status_message(PenTool *const pc, Geom::Point const p, int pc_point_to_compare, gchar const *message)
-{
-    g_assert(pc != NULL);
-    g_assert((pc_point_to_compare == 0) || (pc_point_to_compare == 3)); // exclude control handles
-    g_assert(message != NULL);
-
-    SPDesktop *desktop = SP_EVENT_CONTEXT(pc)->desktop;
-    Geom::Point rel = p - pc->p[pc_point_to_compare];
-    Inkscape::Util::Quantity q = Inkscape::Util::Quantity(Geom::L2(rel), "px");
-    GString *dist = g_string_new(q.string(desktop->namedview->doc_units).c_str());
-    double angle = atan2(rel[Geom::Y], rel[Geom::X]) * 180 / M_PI;
-    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-    if (prefs->getBool("/options/compassangledisplay/value", 0) != 0) {
-        angle = 90 - angle;
-        if (angle < 0) {
-            angle += 360;
-        }
-    }
-
-    pc->message_context->setF(Inkscape::IMMEDIATE_MESSAGE, message, angle, dist->str);
-    g_string_free(dist, FALSE);
-}
-
-static void spdc_pen_set_subsequent_point(PenTool *const pc, Geom::Point const p, bool statusbar, guint status)
-{
-    g_assert( pc->npoints != 0 );
-    // todo: Check callers to see whether 2 <= npoints is guaranteed.
-
-    pc->p[2] = p;
-    pc->p[3] = p;
-    pc->p[4] = p;
-    pc->npoints = 5;
-    pc->red_curve->reset();
-    bool is_curve;
-    pc->red_curve->moveto(pc->p[0]);
-    if (pc->polylines_paraxial && !statusbar) {
-        // we are drawing horizontal/vertical lines and hit an anchor;
-        Geom::Point const origin = pc->p[0];
-        // if the previous point and the anchor are not aligned either horizontally or vertically...
-        if ((abs(p[Geom::X] - origin[Geom::X]) > 1e-9) && (abs(p[Geom::Y] - origin[Geom::Y]) > 1e-9)) {
-            // ...then we should draw an L-shaped path, consisting of two paraxial segments
-            Geom::Point intermed = p;
-            pen_set_to_nearest_horiz_vert(pc, intermed, status, false);
-            pc->red_curve->lineto(intermed);
-        }
-        pc->red_curve->lineto(p);
-        is_curve = false;
-    } else {
-        // one of the 'regular' modes
-        if (pc->p[1] != pc->p[0]) {
-            pc->red_curve->curveto(pc->p[1], p, p);
-            is_curve = true;
-        } else {
-            pc->red_curve->lineto(p);
-            is_curve = false;
-        }
-    }
-
-    sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
-
-    if (statusbar) {
-        gchar *message = is_curve ?
-            _("<b>Curve segment</b>: angle %3.2f&#176;, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> to finish the path" ):
-            _("<b>Line segment</b>: angle %3.2f&#176;, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> to finish the path");
-        spdc_pen_set_angle_distance_status_message(pc, p, 0, message);
-    }
-}
-
-static void spdc_pen_set_ctrl(PenTool *const pc, Geom::Point const p, guint const state)
-{
-    sp_canvas_item_show(pc->c1);
-    sp_canvas_item_show(pc->cl1);
-
-    if ( pc->npoints == 2 ) {
-        pc->p[1] = p;
-        sp_canvas_item_hide(pc->c0);
-        sp_canvas_item_hide(pc->cl0);
-        SP_CTRL(pc->c1)->moveto(pc->p[1]);
-        pc->cl1->setCoords(pc->p[0], pc->p[1]);
-
-        spdc_pen_set_angle_distance_status_message(pc, p, 0, _("<b>Curve handle</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle"));
-    } else if ( pc->npoints == 5 ) {
-        pc->p[4] = p;
-        sp_canvas_item_show(pc->c0);
-        sp_canvas_item_show(pc->cl0);
-        bool is_symm = false;
-        if ( ( ( pc->mode == PenTool::MODE_CLICK ) && ( state & GDK_CONTROL_MASK ) ) ||
-             ( ( pc->mode == PenTool::MODE_DRAG ) &&  !( state & GDK_SHIFT_MASK  ) ) ) {
-            Geom::Point delta = p - pc->p[3];
-            pc->p[2] = pc->p[3] - delta;
-            is_symm = true;
-            pc->red_curve->reset();
-            pc->red_curve->moveto(pc->p[0]);
-            pc->red_curve->curveto(pc->p[1], pc->p[2], pc->p[3]);
-            sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
-        }
-        SP_CTRL(pc->c0)->moveto(pc->p[2]);
-        pc->cl0 ->setCoords(pc->p[3], pc->p[2]);
-        SP_CTRL(pc->c1)->moveto(pc->p[4]);
-        pc->cl1->setCoords(pc->p[3], pc->p[4]);
-
-        gchar *message = is_symm ?
-            _("<b>Curve handle, symmetric</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only") :
-            _("<b>Curve handle</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only");
-        spdc_pen_set_angle_distance_status_message(pc, p, 3, message);
-    } else {
-        g_warning("Something bad happened - npoints is %d", pc->npoints);
-    }
-}
-
-static void spdc_pen_finish_segment(PenTool *const pc, Geom::Point const p, guint const state)
-{
-    if (pc->polylines_paraxial) {
-        pen_last_paraxial_dir = pen_next_paraxial_direction(pc, p, pc->p[0], state);
-    }
-
-    ++pc->num_clicks;
-
-    if (!pc->red_curve->is_empty()) {
-        pc->green_curve->append_continuous(pc->red_curve, 0.0625);
-        SPCurve *curve = pc->red_curve->copy();
-        /// \todo fixme:
-        SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), curve);
-        curve->unref();
-        sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
-
-        pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
-
-        pc->p[0] = pc->p[3];
-        pc->p[1] = pc->p[4];
-        pc->npoints = 2;
-
-        pc->red_curve->reset();
-    }
-}
-
-static void spdc_pen_finish(PenTool *const pc, gboolean const closed)
-{
-    if (pc->expecting_clicks_for_LPE > 1) {
-        // don't let the path be finished before we have collected the required number of mouse clicks
-        return;
-    }
-
-    pc->num_clicks = 0;
-
-    pen_disable_events(pc);
-
-    SPDesktop *const desktop = pc->desktop;
-    pc->message_context->clear();
-    desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Drawing finished"));
-
-    pc->red_curve->reset();
-    spdc_concat_colors_and_flush(pc, closed);
-    pc->sa = NULL;
-    pc->ea = NULL;
-
-    pc->npoints = 0;
-    pc->state = PenTool::POINT;
-
-    sp_canvas_item_hide(pc->c0);
-    sp_canvas_item_hide(pc->c1);
-    sp_canvas_item_hide(pc->cl0);
-    sp_canvas_item_hide(pc->cl1);
-
-    if (pc->green_anchor) {
-        pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
-    }
-
-
-    pc->desktop->canvas->endForcedFullRedraws();
-
-    pen_enable_events(pc);
-}
-
-static void pen_disable_events(PenTool *const pc) {
-  pc->events_disabled++;
-}
-
-static void pen_enable_events(PenTool *const pc) {
-  g_return_if_fail(pc->events_disabled != 0);
-
-  pc->events_disabled--;
-}
-
-void sp_pen_context_wait_for_LPE_mouse_clicks(PenTool *pc, Inkscape::LivePathEffect::EffectType effect_type,
-                                         unsigned int num_clicks, bool use_polylines)
-{
-    if (effect_type == Inkscape::LivePathEffect::INVALID_LPE)
-        return;
-
-    pc->waiting_LPE_type = effect_type;
-    pc->expecting_clicks_for_LPE = num_clicks;
-    pc->polylines_only = use_polylines;
-    pc->polylines_paraxial = false; // TODO: think if this is correct for all cases
-}
-
-void sp_pen_context_cancel_waiting_for_LPE(PenTool *pc)
-{
-    pc->waiting_LPE_type = Inkscape::LivePathEffect::INVALID_LPE;
-    pc->expecting_clicks_for_LPE = 0;
-    sp_pen_context_set_polyline_mode(pc);
-}
-
-static int pen_next_paraxial_direction(const PenTool *const pc,
-                                       Geom::Point const &pt, Geom::Point const &origin, guint state) {
-    //
-    // after the first mouse click we determine whether the mouse pointer is closest to a
-    // horizontal or vertical segment; for all subsequent mouse clicks, we use the direction
-    // orthogonal to the last one; pressing Shift toggles the direction
-    //
-    // num_clicks is not reliable because spdc_pen_finish_segment is sometimes called too early
-    // (on first mouse release), in which case num_clicks immediately becomes 1.
-    // if (pc->num_clicks == 0) {
-
-    if (pc->green_curve->is_empty()) {
-        // first mouse click
-        double dist_h = fabs(pt[Geom::X] - origin[Geom::X]);
-        double dist_v = fabs(pt[Geom::Y] - origin[Geom::Y]);
-        int ret = (dist_h < dist_v) ? 1 : 0; // 0 = horizontal, 1 = vertical
-        pen_last_paraxial_dir = (state & GDK_SHIFT_MASK) ? 1 - ret : ret;
-        return pen_last_paraxial_dir;
-    } else {
-        // subsequent mouse click
-        return (state & GDK_SHIFT_MASK) ? pen_last_paraxial_dir : 1 - pen_last_paraxial_dir;
-    }
-}
-
-void pen_set_to_nearest_horiz_vert(const PenTool *const pc, Geom::Point &pt, guint const state, bool snap)
-{
-    Geom::Point const origin = pc->p[0];
-
-    int next_dir = pen_next_paraxial_direction(pc, pt, origin, state);
-
-    if (!snap) {
-        if (next_dir == 0) {
-            // line is forced to be horizontal
-            pt[Geom::Y] = origin[Geom::Y];
-        } else {
-            // line is forced to be vertical
-            pt[Geom::X] = origin[Geom::X];
-        }
-    } else {
-        // Create a horizontal or vertical constraint line
-        Inkscape::Snapper::SnapConstraint cl(origin, next_dir ? Geom::Point(0, 1) : Geom::Point(1, 0));
-
-        // Snap along the constraint line; if we didn't snap then still the constraint will be applied
-        SnapManager &m = pc->desktop->namedview->snap_manager;
-
-        Inkscape::Selection *selection = sp_desktop_selection (pc->desktop);
-        // selection->singleItem() is the item that is currently being drawn. This item will not be snapped to (to avoid self-snapping)
-        // TODO: Allow snapping to the stationary parts of the item, and only ignore the last segment
-
-        m.setup(pc->desktop, true, selection->singleItem());
-        m.constrainedSnapReturnByRef(pt, Inkscape::SNAPSOURCE_NODE_HANDLE, cl);
-        m.unSetup();
-    }
-}
-
-}
-}
-}
-
-/*
-  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:fileencoding=utf-8:textwidth=99 :