pen-tool.cpp revision 2e3651cfff3c5a3633954c5598779a6e4d7a2406
/** \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 "ui/tools/pen-tool.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"
// we include the necessary files for BSpline & Spiro
#include "live_effects/effect.h"
#include "live_effects/lpeobject.h"
#include "live_effects/lpeobject-reference.h"
#include "live_effects/parameter/path.h"
#define INKSCAPE_LPE_SPIRO_C
#include "live_effects/lpe-spiro.h"
#include <typeinfo>
#include <2geom/pathvector.h>
#include <2geom/affine.h>
#include <2geom/bezier-curve.h>
#include <2geom/hvlinesegment.h>
#include "helper/geom-nodetype.h"
#include "helper/geom-curves.h"
// For handling un-continuous paths:
#include "message-stack.h"
#include "inkscape.h"
#include "desktop.h"
#include "live_effects/spiro.h"
#define INKSCAPE_LPE_BSPLINE_C
#include "live_effects/lpe-bspline.h"
#include <2geom/nearest-point.h>
#include "tool-factory.h"
#include "live_effects/effect.h"
using Inkscape::ControlManager;
namespace Inkscape {
namespace UI {
namespace Tools {
static Geom::Point pen_drag_origin_w(0, 0);
static bool pen_within_tolerance = false;
static int pen_last_paraxial_dir = 0; // last used direction in horizontal/vertical mode; 0 = horizontal, 1 = vertical
const double handleCubicGap = 0.01;
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()
: FreehandBase(cursor_pen_xpm, 4, 4)
, p()
, npoints(0)
, mode(MODE_CLICK)
, state(POINT)
, polylines_only(false)
, polylines_paraxial(false)
, num_clicks(0)
, expecting_clicks_for_LPE(0)
, waiting_LPE(NULL)
, waiting_item(NULL)
, c0(NULL)
, c1(NULL)
, cl0(NULL)
, cl1(NULL)
, events_disabled(false)
{
}
PenTool::PenTool(gchar const *const *cursor_shape, gint hot_x, gint hot_y)
: FreehandBase(cursor_shape, hot_x, hot_y)
, p()
, npoints(0)
, mode(MODE_CLICK)
, state(POINT)
, polylines_only(false)
, polylines_paraxial(false)
, num_clicks(0)
, expecting_clicks_for_LPE(0)
, waiting_LPE(NULL)
, waiting_item(NULL)
, c0(NULL)
, c1(NULL)
, cl0(NULL)
, cl1(NULL)
, events_disabled(false)
{
}
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 PenTool::setPolylineMode() {
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
guint mode = prefs->getInt("/tools/freehand/pen/freehand-mode", 0);
// change the nodes to make space for bspline mode
this->polylines_only = (mode == 3 || mode == 4);
this->polylines_paraxial = (mode == 4);
//we call the function which defines the Spiro modes and the BSpline
//todo: merge to one function only
this->_pen_context_set_mode(mode);
}
/*
*.Set the mode of draw spiro, and bsplines
*/
void PenTool::_pen_context_set_mode(guint mode) {
// define the nodes
this->spiro = (mode == 1);
this->bspline = (mode == 2);
}
/**
* Callback to initialize PenTool object.
*/
void PenTool::setup() {
FreehandBase::setup();
ControlManager &mgr = ControlManager::getManager();
// Pen indicators
this->c0 = mgr.createControl(sp_desktop_controls(this->desktop), Inkscape::CTRL_TYPE_ADJ_HANDLE);
mgr.track(this->c0);
this->c1 = mgr.createControl(sp_desktop_controls(this->desktop), Inkscape::CTRL_TYPE_ADJ_HANDLE);
mgr.track(this->c1);
this->cl0 = mgr.createControlLine(sp_desktop_controls(this->desktop));
this->cl1 = mgr.createControlLine(sp_desktop_controls(this->desktop));
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;
this->setPolylineMode();
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
if (prefs->getBool("/tools/freehand/pen/selcue")) {
this->enableSelectionCue();
}
}
void PenTool::_cancel() {
this->num_clicks = 0;
this->state = PenTool::STOP;
this->_resetColors();
sp_canvas_item_hide(this->c0);
sp_canvas_item_hide(this->c1);
sp_canvas_item_hide(this->cl0);
sp_canvas_item_hide(this->cl1);
this->message_context->clear();
this->message_context->flash(Inkscape::NORMAL_MESSAGE, _("Drawing cancelled"));
this->desktop->canvas->endForcedFullRedraws();
}
/**
* Finalization callback.
*/
void PenTool::finish() {
sp_event_context_discard_delayed_snap_event(this);
if (this->npoints != 0) {
// switching context - finish path
this->ea = NULL; // unset end anchor if set (otherwise crashes)
this->_finish(false);
}
FreehandBase::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;
}
}
}
bool PenTool::hasWaitingLPE() {
// note: waiting_LPE_type is defined in SPDrawContext
return (this->waiting_LPE != NULL ||
this->waiting_LPE_type != Inkscape::LivePathEffect::INVALID_LPE);
}
/**
* Snaps new node relative to the previous node.
*/
void PenTool::_endpointSnap(Geom::Point &p, guint const state) const {
if ((state & GDK_CONTROL_MASK) && !this->polylines_paraxial) { //CTRL enables angular snapping
if (this->npoints > 0) {
spdc_endpoint_snap_rotation(this, p, this->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 ((this->npoints > 0) && this->polylines_paraxial) {
// snap constrained
this->_setToNearestHorizVert(p, state, true);
} else {
// snap freely
boost::optional<Geom::Point> origin = this->npoints > 0 ? this->p[0] : boost::optional<Geom::Point>();
spdc_endpoint_snap_free(this, p, origin, state); // pass the origin, to allow for perpendicular / tangential snapping
}
}
}
/**
* Snaps new node's handle relative to the new node.
*/
void PenTool::_endpointSnapHandle(Geom::Point &p, guint const state) const {
g_return_if_fail(( this->npoints == 2 ||
this->npoints == 5 ));
if ((state & GDK_CONTROL_MASK)) { //CTRL enables angular snapping
spdc_endpoint_snap_rotation(this, p, this->p[this->npoints - 2], state);
} else {
if (!(state & GDK_SHIFT_MASK)) { //SHIFT disables all snapping, except the angular snapping above
boost::optional<Geom::Point> origin = this->p[this->npoints - 2];
spdc_endpoint_snap_free(this, p, origin, state);
}
}
}
bool PenTool::item_handler(SPItem* item, GdkEvent* event) {
bool ret = false;
switch (event->type) {
case GDK_BUTTON_PRESS:
ret = this->_handleButtonPress(event->button);
break;
case GDK_BUTTON_RELEASE:
ret = this->_handleButtonRelease(event->button);
break;
default:
break;
}
if (!ret) {
ret = FreehandBase::item_handler(item, event);
}
return ret;
}
/**
* Callback to handle all pen events.
*/
bool PenTool::root_handler(GdkEvent* event) {
bool ret = false;
switch (event->type) {
case GDK_BUTTON_PRESS:
ret = this->_handleButtonPress(event->button);
break;
case GDK_MOTION_NOTIFY:
ret = this->_handleMotionNotify(event->motion);
break;
case GDK_BUTTON_RELEASE:
ret = this->_handleButtonRelease(event->button);
break;
case GDK_2BUTTON_PRESS:
ret = this->_handle2ButtonPress(event->button);
break;
case GDK_KEY_PRESS:
ret = this->_handleKeyPress(event);
break;
default:
break;
}
if (!ret) {
ret = FreehandBase::root_handler(event);
}
return ret;
}
/**
* Handle mouse button press event.
*/
bool PenTool::_handleButtonPress(GdkEventButton const &bevent) {
if (this->events_disabled) {
// skip event processing if events are disabled
return false;
}
Geom::Point const event_w(bevent.x, bevent.y);
Geom::Point event_dt(desktop->w2d(event_w));
//Test whether we hit any anchor.
SPDrawAnchor * const anchor = spdc_test_inside(this, event_w);
//with this we avoid creating a new point over the existing one
if(bevent.button != 3 && (this->spiro || this->bspline) && this->npoints > 0 && this->p[0] == this->p[3]){
if( anchor && anchor == this->sa && this->green_curve->is_empty()){
//remove the following line to avoid having one node on top of another
_finishSegment(event_dt, bevent.state);
_finish( false);
return true;
}
return false;
}
bool ret = false;
if (bevent.button == 1 && !this->space_panning
// make sure this is not the last click for a waiting LPE (otherwise we want to finish the path)
&& this->expecting_clicks_for_LPE != 1) {
if (Inkscape::have_viable_layer(desktop, this->message_context) == false) {
return true;
}
if (!this->grab ) {
// Grab mouse, so release will not pass unnoticed
this->grab = SP_CANVAS_ITEM(desktop->acetate);
sp_canvas_item_grab(this->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;
switch (this->mode) {
case PenTool::MODE_CLICK:
// In click mode we add point on release
switch (this->state) {
case PenTool::POINT:
case PenTool::CONTROL:
case PenTool::CLOSE:
break;
case PenTool::STOP:
// This is allowed, if we just canceled curve
this->state = PenTool::POINT;
break;
default:
break;
}
break;
case PenTool::MODE_DRAG:
switch (this->state) {
case PenTool::STOP:
// This is allowed, if we just canceled curve
case PenTool::POINT:
if (this->npoints == 0) {
Geom::Point p;
if ((bevent.state & GDK_CONTROL_MASK) && (this->polylines_only || this->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(this, 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
this->sa = anchor;
if(anchor){
this->_bspline_spiro_start_anchor(bevent.state & GDK_SHIFT_MASK);
}
if (anchor && (!this->hasWaitingLPE()|| this->bspline || this->spiro)) {
// 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) || this->hasWaitingLPE()) {
// 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;
this->_endpointSnap(p, bevent.state);
this->green_anchor = sp_draw_anchor_new(this, this->green_curve, true, p);
}
this->_setInitialPoint(p);
} else {
// Set end anchor
this->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
this->state = PenTool::CLOSE;
if (this->green_anchor && this->green_anchor->active) {
// we clicked on the current curve start, so close it even if
// we drag a handle away from it
this->green_closed = true;
}
ret = true;
break;
} else {
p = event_dt;
this->_endpointSnap(p, bevent.state); // Snap node only if not hitting anchor.
this->_setSubsequentPoint(p, true);
}
}
// avoid the creation of a control point so a node is created in the release event
this->state = (this->spiro || this->bspline || this->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 (this->expecting_clicks_for_LPE == 1 && this->npoints != 0) {
// when the last click for a waiting LPE occurs we want to finish the path
this->_finishSegment(event_dt, bevent.state);
if (this->green_closed) {
// finishing at the start anchor, close curve
this->_finish(true);
} else {
// finishing at some other anchor, finish curve but not close
this->_finish(false);
}
ret = true;
} else if (bevent.button == 3 && this->npoints != 0) {
// right click - finish path
this->ea = NULL; // unset end anchor if set (otherwise crashes)
this->_finish(false);
ret = true;
}
if (this->expecting_clicks_for_LPE > 0) {
--this->expecting_clicks_for_LPE;
}
return ret;
}
/**
* Handle motion_notify event.
*/
bool PenTool::_handleMotionNotify(GdkEventMotion const &mevent) {
bool ret = false;
if (this->space_panning || mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
// allow scrolling
return false;
}
if (this->events_disabled) {
// skip motion events if pen events are disabled
return false;
}
Geom::Point const event_w(mevent.x, mevent.y);
//we take out the function the const "tolerance" because we need it later
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
gint const tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
if (pen_within_tolerance) {
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 = desktop->w2d(event_w);
// Test, whether we hit any anchor
SPDrawAnchor *anchor = spdc_test_inside(this, event_w);
switch (this->mode) {
case PenTool::MODE_CLICK:
switch (this->state) {
case PenTool::POINT:
if ( this->npoints != 0 ) {
// Only set point, if we are already appending
this->_endpointSnap(p, mevent.state);
this->_setSubsequentPoint(p, true);
ret = true;
} else if (!this->sp_event_context_knot_mouseover()) {
SnapManager &m = desktop->namedview->snap_manager;
m.setup(desktop);
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
this->_endpointSnap(p, mevent.state);
this->_setCtrl(p, mevent.state);
ret = true;
break;
case PenTool::STOP:
// This is perfectly valid
break;
default:
break;
}
break;
case PenTool::MODE_DRAG:
switch (this->state) {
case PenTool::POINT:
if ( this->npoints > 0 ) {
// Only set point, if we are already appending
if (!anchor) { // Snap node only if not hitting anchor
this->_endpointSnap(p, mevent.state);
this->_setSubsequentPoint(p, true, mevent.state);
} else {
this->_setSubsequentPoint(anchor->dp, false, mevent.state);
}
if (anchor && !this->anchor_statusbar) {
if(!this->spiro && !this->bspline){
this->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path."));
}else{
this->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path. Shift+Click make a cusp node"));
}
this->anchor_statusbar = true;
} else if (!anchor && this->anchor_statusbar) {
this->message_context->clear();
this->anchor_statusbar = false;
}
ret = true;
} else {
if (anchor && !this->anchor_statusbar) {
if(!this->spiro && !this->bspline){
this->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to continue the path from this point."));
}else{
this->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to continue the path from this point. Shift+Click make a cusp node"));
}
this->anchor_statusbar = true;
} else if (!anchor && this->anchor_statusbar) {
this->message_context->clear();
this->anchor_statusbar = false;
}
if (!this->sp_event_context_knot_mouseover()) {
SnapManager &m = desktop->namedview->snap_manager;
m.setup(desktop);
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
this->_endpointSnapHandle(p, mevent.state);
if (!this->polylines_only) {
this->_setCtrl(p, mevent.state);
} else {
this->_setCtrl(this->p[1], mevent.state);
}
gobble_motion_events(GDK_BUTTON1_MASK);
ret = true;
break;
case PenTool::STOP:
// This is perfectly valid
break;
default:
if (!this->sp_event_context_knot_mouseover()) {
SnapManager &m = desktop->namedview->snap_manager;
m.setup(desktop);
m.preSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE));
m.unSetup();
}
break;
}
break;
default:
break;
}
// calls the function "bspline_spiro_motion" when the mouse starts or stops moving
if(this->bspline){
this->_bspline_spiro_color();
this->_bspline_spiro_motion(mevent.state & GDK_SHIFT_MASK);
}else{
if ( Geom::LInfty( event_w - pen_drag_origin_w ) > (tolerance/2) || mevent.time == 0) {
this->_bspline_spiro_color();
this->_bspline_spiro_motion(mevent.state & GDK_SHIFT_MASK);
pen_drag_origin_w = event_w;
}
}
return ret;
}
/**
* Handle mouse button release event.
*/
bool PenTool::_handleButtonRelease(GdkEventButton const &revent) {
if (this->events_disabled) {
// skip event processing if events are disabled
return false;
}
bool ret = false;
if (revent.button == 1 && !this->space_panning) {
Geom::Point const event_w(revent.x, revent.y);
// Find desktop coordinates
Geom::Point p = this->desktop->w2d(event_w);
// Test whether we hit any anchor.
SPDrawAnchor *anchor = spdc_test_inside(this, event_w);
// if we try to create a node in the same place as another node, we skip
if((!anchor || anchor == this->sa) && (this->spiro || this->bspline) && this->npoints > 0 && this->p[0] == this->p[3]){
return true;
}
switch (this->mode) {
case PenTool::MODE_CLICK:
switch (this->state) {
case PenTool::POINT:
if ( this->npoints == 0 ) {
// Start new thread only with button release
if (anchor) {
p = anchor->dp;
}
this->sa = anchor;
// continue the existing curve
if (anchor) {
if(this->bspline || this->spiro){
this->_bspline_spiro_start_anchor(revent.state & GDK_SHIFT_MASK);;
}
}
this->_setInitialPoint(p);
} else {
// Set end anchor here
this->ea = anchor;
if (anchor) {
p = anchor->dp;
}
}
this->state = PenTool::CONTROL;
ret = true;
break;
case PenTool::CONTROL:
// End current segment
this->_endpointSnap(p, revent.state);
this->_finishSegment(p, revent.state);
this->state = PenTool::POINT;
ret = true;
break;
case PenTool::CLOSE:
// End current segment
if (!anchor) { // Snap node only if not hitting anchor
this->_endpointSnap(p, revent.state);
}
this->_finishSegment(p, revent.state);
// hude the guide of the penultimate node when closing the curve
if(this->spiro){
sp_canvas_item_hide(this->c1);
}
this->_finish(true);
this->state = PenTool::POINT;
ret = true;
break;
case PenTool::STOP:
// This is allowed, if we just canceled curve
this->state = PenTool::POINT;
ret = true;
break;
default:
break;
}
break;
case PenTool::MODE_DRAG:
switch (this->state) {
case PenTool::POINT:
case PenTool::CONTROL:
this->_endpointSnap(p, revent.state);
this->_finishSegment(p, revent.state);
break;
case PenTool::CLOSE:
this->_endpointSnap(p, revent.state);
this->_finishSegment(p, revent.state);
// hide the penultimate node guide when closing the curve
if(this->spiro){
sp_canvas_item_hide(this->c1);
}
if (this->green_closed) {
// finishing at the start anchor, close curve
this->_finish(true);
} else {
// finishing at some other anchor, finish curve but not close
this->_finish(false);
}
break;
case PenTool::STOP:
// This is allowed, if we just cancelled curve
break;
default:
break;
}
this->state = PenTool::POINT;
ret = true;
break;
default:
break;
}
if (this->grab) {
// Release grab now
sp_canvas_item_ungrab(this->grab, revent.time);
this->grab = NULL;
}
ret = true;
this->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 (this->expecting_clicks_for_LPE == 0 && this->hasWaitingLPE()) {
this->setPolylineMode();
Inkscape::Selection *selection = sp_desktop_selection(this->desktop);
if (this->waiting_LPE) {
// we have an already created LPE waiting for a path
this->waiting_LPE->acceptParamPath(SP_PATH(selection->singleItem()));
selection->add(this->waiting_item);
this->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;
}
bool PenTool::_handle2ButtonPress(GdkEventButton const &bevent) {
bool ret = false;
// only end on LMB double click. Otherwise horizontal scrolling causes ending of the path
if (this->npoints != 0 && bevent.button == 1) {
this->_finish(false);
ret = true;
}
return ret;
}
void PenTool::_redrawAll() {
// green
if (this->green_bpaths) {
// remove old piecewise green canvasitems
while (this->green_bpaths) {
sp_canvas_item_destroy(SP_CANVAS_ITEM(this->green_bpaths->data));
this->green_bpaths = g_slist_remove(this->green_bpaths, this->green_bpaths->data);
}
// one canvas bpath for all of green_curve
SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(this->desktop), this->green_curve);
sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), this->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);
this->green_bpaths = g_slist_prepend(this->green_bpaths, cshape);
}
if (this->green_anchor)
SP_CTRL(this->green_anchor->ctrl)->moveto(this->green_anchor->dp);
this->red_curve->reset();
this->red_curve->moveto(this->p[0]);
this->red_curve->curveto(this->p[1], this->p[2], this->p[3]);
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->red_bpath), this->red_curve);
// handles
// hide the handlers in bspline and spiro modes
if (this->p[0] != this->p[1] && !this->spiro && !this->bspline) {
SP_CTRL(this->c1)->moveto(this->p[1]);
this->cl1->setCoords(this->p[0], this->p[1]);
sp_canvas_item_show(this->c1);
sp_canvas_item_show(this->cl1);
} else {
sp_canvas_item_hide(this->c1);
sp_canvas_item_hide(this->cl1);
}
Geom::Curve const * last_seg = this->green_curve->last_segment();
if (last_seg) {
Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>( last_seg );
// hide the handlers in bspline and spiro modes
if ( cubic &&
(*cubic)[2] != this->p[0] && !this->spiro && !this->bspline )
{
Geom::Point p2 = (*cubic)[2];
SP_CTRL(this->c0)->moveto(p2);
this->cl0->setCoords(p2, this->p[0]);
sp_canvas_item_show(this->c0);
sp_canvas_item_show(this->cl0);
} else {
sp_canvas_item_hide(this->c0);
sp_canvas_item_hide(this->cl0);
}
}
// simply redraw the spiro. because its a redrawing, we don't call the global function,
// but we call the redrawing at the ending.
this->_bspline_spiro_build();
}
void PenTool::_lastpointMove(gdouble x, gdouble y) {
if (this->npoints != 5)
return;
// green
if (!this->green_curve->is_empty()) {
this->green_curve->last_point_additive_move( Geom::Point(x,y) );
} else {
// start anchor too
if (this->green_anchor) {
this->green_anchor->dp += Geom::Point(x, y);
}
}
// red
this->p[0] += Geom::Point(x, y);
this->p[1] += Geom::Point(x, y);
this->_redrawAll();
}
void PenTool::_lastpointMoveScreen(gdouble x, gdouble y) {
this->_lastpointMove(x / this->desktop->current_zoom(), y / this->desktop->current_zoom());
}
void PenTool::_lastpointToCurve() {
// avoid that if the "red_curve" contains only two points ( rect ), it doesn't stop here.
if (this->npoints != 5 && !this->spiro && !this->bspline)
return;
this->p[1] = this->red_curve->last_segment()->initialPoint() + (1./3.)*(this->red_curve->last_segment()->finalPoint() - this->red_curve->last_segment()->initialPoint());
//modificate the last segment of the green curve so it creates the type of node we need
if (this->spiro||this->bspline) {
if (!this->green_curve->is_empty()) {
Geom::Point A(0,0);
Geom::Point B(0,0);
Geom::Point C(0,0);
Geom::Point D(0,0);
Geom::CubicBezier const *cubic = dynamic_cast<Geom::CubicBezier const *>( this->green_curve->last_segment() );
//We obtain the last segment 4 points in the previous curve
if ( cubic ){
A = (*cubic)[0];
B = (*cubic)[1];
if (this->spiro) {
C = this->p[0] + (this->p[0] - this->p[1]);
} else {
C = this->green_curve->last_segment()->finalPoint() + (1./3.)*(this->green_curve->last_segment()->initialPoint() - this->green_curve->last_segment()->finalPoint());
}
D = (*cubic)[3];
} else {
A = this->green_curve->last_segment()->initialPoint();
B = this->green_curve->last_segment()->initialPoint();
if (this->spiro) {
C = this->p[0] + (this->p[0] - this->p[1]);
} else {
C = this->green_curve->last_segment()->finalPoint() + (1./3.)*(this->green_curve->last_segment()->initialPoint() - this->green_curve->last_segment()->finalPoint());
}
D = this->green_curve->last_segment()->finalPoint();
}
SPCurve *previous = new SPCurve();
previous->moveto(A);
previous->curveto(B, C, D);
if ( this->green_curve->get_segment_count() == 1) {
this->green_curve = previous;
} else {
//we eliminate the last segment
this->green_curve->backspace();
//and we add it again with the recreation
this->green_curve->append_continuous(previous, 0.0625);
}
}
//if the last node is an union with another curve
if (this->green_curve->is_empty() && this->sa && !this->sa->curve->is_empty()) {
this->_bspline_spiro_start_anchor(false);
}
}
this->_redrawAll();
}
void PenTool::_lastpointToLine() {
// avoid that if the "red_curve" contains only two points ( rect) it doesn't stop here.
if (this->npoints != 5 && !this->bspline)
return;
// modify the last segment of the green curve so the type of node we want is created.
if(this->spiro || this->bspline){
if(!this->green_curve->is_empty()){
Geom::Point A(0,0);
Geom::Point B(0,0);
Geom::Point C(0,0);
Geom::Point D(0,0);
SPCurve * previous = new SPCurve();
Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>( this->green_curve->last_segment() );
if ( cubic ) {
A = this->green_curve->last_segment()->initialPoint();
B = (*cubic)[1];
C = this->green_curve->last_segment()->finalPoint();
D = C;
} else {
//We obtain the last segment 4 points in the previous curve
A = this->green_curve->last_segment()->initialPoint();
B = A;
C = this->green_curve->last_segment()->finalPoint();
D = C;
}
previous->moveto(A);
previous->curveto(B, C, D);
if( this->green_curve->get_segment_count() == 1){
this->green_curve = previous;
}else{
//we eliminate the last segment
this->green_curve->backspace();
//and we add it again with the recreation
this->green_curve->append_continuous(previous, 0.0625);
}
}
// if the last node is an union with another curve
if(this->green_curve->is_empty() && this->sa && !this->sa->curve->is_empty()){
this->_bspline_spiro_start_anchor(true);
}
}
this->p[1] = this->p[0];
this->_redrawAll();
}
bool PenTool::_handleKeyPress(GdkEvent *event) {
bool 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)) {
this->_lastpointMoveScreen(-10, 0); // shift
}
else {
this->_lastpointMoveScreen(-1, 0); // no shift
}
}
else { // no alt
if (MOD__SHIFT(event)) {
this->_lastpointMove(-10*nudge, 0); // shift
}
else {
this->_lastpointMove(-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)) {
this->_lastpointMoveScreen(0, 10); // shift
}
else {
this->_lastpointMoveScreen(0, 1); // no shift
}
}
else { // no alt
if (MOD__SHIFT(event)) {
this->_lastpointMove(0, 10*nudge); // shift
}
else {
this->_lastpointMove(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)) {
this->_lastpointMoveScreen(10, 0); // shift
}
else {
this->_lastpointMoveScreen(1, 0); // no shift
}
}
else { // no alt
if (MOD__SHIFT(event)) {
this->_lastpointMove(10*nudge, 0); // shift
}
else {
this->_lastpointMove(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)) {
this->_lastpointMoveScreen(0, -10); // shift
}
else {
this->_lastpointMoveScreen(0, -1); // no shift
}
}
else { // no alt
if (MOD__SHIFT(event)) {
this->_lastpointMove(0, -10*nudge); // shift
}
else {
this->_lastpointMove(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)) {
this->_lastpointToCurve();
ret = true;
}
break;
case GDK_KEY_L:
case GDK_KEY_l:
if (MOD__SHIFT_ONLY(event)) {
this->_lastpointToLine();
ret = true;
}
break;
case GDK_KEY_Return:
case GDK_KEY_KP_Enter:
if (this->npoints != 0) {
this->ea = NULL; // unset end anchor if set (otherwise crashes)
this->_finish(false);
ret = true;
}
break;
case GDK_KEY_Escape:
if (this->npoints != 0) {
// if drawing, cancel, otherwise pass it up for deselecting
this->_cancel ();
ret = true;
}
break;
case GDK_KEY_z:
case GDK_KEY_Z:
if (MOD__CTRL_ONLY(event) && this->npoints != 0) {
// if drawing, cancel, otherwise pass it up for undo
this->_cancel ();
ret = true;
}
break;
case GDK_KEY_g:
case GDK_KEY_G:
if (MOD__SHIFT_ONLY(event)) {
sp_selection_to_guides(this->desktop);
ret = true;
}
break;
case GDK_KEY_BackSpace:
case GDK_KEY_Delete:
case GDK_KEY_KP_Delete:
if ( this->green_curve->is_empty() || (this->green_curve->last_segment() == NULL) ) {
if (!this->red_curve->is_empty()) {
this->_cancel ();
ret = true;
} else {
// do nothing; this event should be handled upstream
}
} else {
// Reset red curve
this->red_curve->reset();
// Destroy topmost green bpath
if (this->green_bpaths) {
if (this->green_bpaths->data) {
sp_canvas_item_destroy(SP_CANVAS_ITEM(this->green_bpaths->data));
}
this->green_bpaths = g_slist_remove(this->green_bpaths, this->green_bpaths->data);
}
// Get last segment
if ( this->green_curve->is_empty() ) {
g_warning("pen_handle_key_press, case GDK_KP_Delete: Green curve is empty");
break;
}
// The code below assumes that this->green_curve has only ONE path !
Geom::Curve const * crv = this->green_curve->last_segment();
this->p[0] = crv->initialPoint();
if ( Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>(crv)) {
this->p[1] = (*cubic)[1];
} else {
this->p[1] = this->p[0];
}
// asign the value in a third of the distance of the last segment.
if (this->bspline){
this->p[1] = this->p[0] + (1./3)*(this->p[3] - this->p[0]);
}
Geom::Point const pt( (this->npoints < 4) ? crv->finalPoint() : this->p[3] );
this->npoints = 2;
// delete the last segment of the green curve
if (this->green_curve->get_segment_count() == 1) {
this->npoints = 5;
if (this->green_bpaths) {
if (this->green_bpaths->data) {
sp_canvas_item_destroy(SP_CANVAS_ITEM(this->green_bpaths->data));
}
this->green_bpaths = g_slist_remove(this->green_bpaths, this->green_bpaths->data);
}
this->green_curve->reset();
} else {
this->green_curve->backspace();
}
// assign the value of this->p[1] to the oposite of the green line last segment
if (this->spiro){
Geom::CubicBezier const *cubic = dynamic_cast<Geom::CubicBezier const *>(this->green_curve->last_segment());
if ( cubic ) {
this->p[1] = (*cubic)[3] + (*cubic)[3] - (*cubic)[2];
SP_CTRL(this->c1)->moveto(this->p[0]);
} else {
this->p[1] = this->p[0];
}
}
sp_canvas_item_hide(this->c0);
sp_canvas_item_hide(this->c1);
sp_canvas_item_hide(this->cl0);
sp_canvas_item_hide(this->cl1);
this->state = PenTool::POINT;
this->_setSubsequentPoint(pt, true);
pen_last_paraxial_dir = !pen_last_paraxial_dir;
//redraw
this->_bspline_spiro_build();
ret = true;
}
break;
default:
break;
}
return ret;
}
void PenTool::_resetColors() {
// Red
this->red_curve->reset();
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->red_bpath), NULL);
// Blue
this->blue_curve->reset();
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->blue_bpath), NULL);
// Blue2
this->blue2_curve->reset();
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->blue2_bpath), NULL);
// Green
while (this->green_bpaths) {
sp_canvas_item_destroy(SP_CANVAS_ITEM(this->green_bpaths->data));
this->green_bpaths = g_slist_remove(this->green_bpaths, this->green_bpaths->data);
}
this->green_curve->reset();
if (this->green_anchor) {
this->green_anchor = sp_draw_anchor_destroy(this->green_anchor);
}
this->sa = NULL;
this->ea = NULL;
this->npoints = 0;
this->red_curve_is_valid = false;
}
void PenTool::_setInitialPoint(Geom::Point const p) {
g_assert( this->npoints == 0 );
this->p[0] = p;
this->p[1] = p;
this->npoints = 2;
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->red_bpath), NULL);
this->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").
*/
void PenTool::_setAngleDistanceStatusMessage(Geom::Point const p, int pc_point_to_compare, gchar const *message) {
g_assert(this != NULL);
g_assert((pc_point_to_compare == 0) || (pc_point_to_compare == 3)); // exclude control handles
g_assert(message != NULL);
Geom::Point rel = p - this->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;
}
}
this->message_context->setF(Inkscape::IMMEDIATE_MESSAGE, message, angle, dist->str);
g_string_free(dist, false);
}
// this function changes the colors red, green and blue making them transparent or not, depending on if spiro is being used.
void PenTool::_bspline_spiro_color()
{
bool remake_green_bpaths = false;
if(this->spiro){
//If the colour is not defined as trasparent, por example when changing
//from drawing to spiro mode or when selecting the pen tool
if(this->green_color != 0x00ff000){
//We change the green and red colours to transparent, so this lines are not necessary
//to the drawing with spiro
this->red_color = 0xff00000;
this->green_color = 0x00ff000;
remake_green_bpaths = true;
}
}else if(this->bspline){
//If we come from working with the spiro curve and change the mode the "green_curve" colour is transparent
if(this->green_color != 0xff00007f){
//since we are not im spiro mode, we assign the original colours
//to the red and the green curve, removing their transparency
this->red_color = 0xff00007f;
//Damos color rojo a la linea verde
this->green_color = 0xff00007f;
remake_green_bpaths = true;
}
}else{
//If we come from working with the spiro curve and change the mode the "green_curve" colour is transparent
if(this->green_color != 0x00ff007f){
//since we are not im spiro mode, we assign the original colours
//to the red and the green curve, removing their transparency
this->red_color = 0xff00007f;
this->green_color = 0x00ff007f;
remake_green_bpaths = true;
}
//we hide the spiro/bspline rests
sp_canvas_item_hide(this->blue2_bpath);
}
//We erase all the "green_bpaths" to recreate them after with the colour
//transparency recently modified
if (this->green_bpaths && remake_green_bpaths) {
// remove old piecewise green canvasitems
while (this->green_bpaths) {
sp_canvas_item_destroy(SP_CANVAS_ITEM(this->green_bpaths->data));
this->green_bpaths = g_slist_remove(this->green_bpaths, this->green_bpaths->data);
}
// one canvas bpath for all of green_curve
SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(this->desktop), this->green_curve);
sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), this->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);
this->green_bpaths = g_slist_prepend(this->green_bpaths, cshape);
}
sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(this->red_bpath), this->red_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
}
void PenTool::_bspline_spiro(bool shift)
{
if(!this->spiro && !this->bspline)
return;
shift?this->_bspline_spiro_off():this->_bspline_spiro_on();
this->_bspline_spiro_build();
}
void PenTool::_bspline_spiro_on()
{
if(!this->red_curve->is_empty()){
using Geom::X;
using Geom::Y;
this->npoints = 5;
this->p[0] = this->red_curve->first_segment()->initialPoint();
this->p[3] = this->red_curve->first_segment()->finalPoint();
this->p[2] = this->p[3] + (1./3)*(this->p[0] - this->p[3]);
this->p[2] = Geom::Point(this->p[2][X] + handleCubicGap,this->p[2][Y] + handleCubicGap);
}
}
void PenTool::_bspline_spiro_off()
{
if(!this->red_curve->is_empty()){
this->npoints = 5;
this->p[0] = this->red_curve->first_segment()->initialPoint();
this->p[3] = this->red_curve->first_segment()->finalPoint();
this->p[2] = this->p[3];
}
}
void PenTool::_bspline_spiro_start_anchor(bool shift)
{
if(this->sa->curve->is_empty()){
return;
}
LivePathEffect::LPEBSpline *lpe_bsp = NULL;
if (SP_IS_LPE_ITEM(this->white_item) && SP_LPE_ITEM(this->white_item)->hasPathEffect()){
Inkscape::LivePathEffect::Effect* thisEffect = SP_LPE_ITEM(this->white_item)->getPathEffectOfType(Inkscape::LivePathEffect::BSPLINE);
if(thisEffect){
lpe_bsp = dynamic_cast<LivePathEffect::LPEBSpline*>(thisEffect->getLPEObj()->get_lpe());
}
}
if(lpe_bsp){
this->bspline = true;
}else{
this->bspline = false;
}
LivePathEffect::LPESpiro *lpe_spi = NULL;
if (SP_IS_LPE_ITEM(this->white_item) && SP_LPE_ITEM(this->white_item)->hasPathEffect()){
Inkscape::LivePathEffect::Effect* thisEffect = SP_LPE_ITEM(this->white_item)->getPathEffectOfType(Inkscape::LivePathEffect::SPIRO);
if(thisEffect){
lpe_spi = dynamic_cast<LivePathEffect::LPESpiro*>(thisEffect->getLPEObj()->get_lpe());
}
}
if(lpe_spi){
this->spiro = true;
}else{
this->spiro = false;
}
if(!this->spiro && !this->bspline)
return;
if(shift)
this->_bspline_spiro_start_anchor_off();
else
this->_bspline_spiro_start_anchor_on();
}
void PenTool::_bspline_spiro_start_anchor_on()
{
using Geom::X;
using Geom::Y;
SPCurve *tmpCurve = new SPCurve();
tmpCurve = this->sa->curve->copy();
if(this->sa->start)
tmpCurve = tmpCurve->create_reverse();
Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*tmpCurve->last_segment());
SPCurve *lastSeg = new SPCurve();
Geom::Point A = tmpCurve->last_segment()->initialPoint();
Geom::Point D = tmpCurve->last_segment()->finalPoint();
Geom::Point C = D + (1./3)*(A - D);
C = Geom::Point(C[X] + handleCubicGap,C[Y] + handleCubicGap);
if(cubic){
lastSeg->moveto(A);
lastSeg->curveto((*cubic)[1],C,D);
}else{
lastSeg->moveto(A);
lastSeg->curveto(A,C,D);
}
if( tmpCurve->get_segment_count() == 1){
tmpCurve = lastSeg;
}else{
//we eliminate the last segment
tmpCurve->backspace();
//and we add it again with the recreation
tmpCurve->append_continuous(lastSeg, 0.0625);
}
if (this->sa->start) {
tmpCurve = tmpCurve->create_reverse();
}
this->overwriteCurve = tmpCurve;
}
void PenTool::_bspline_spiro_start_anchor_off()
{
SPCurve *tmpCurve = new SPCurve();
tmpCurve = this->sa->curve->copy();
if(this->sa->start)
tmpCurve = tmpCurve->create_reverse();
Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*tmpCurve->last_segment());
if(cubic){
SPCurve *lastSeg = new SPCurve();
lastSeg->moveto((*cubic)[0]);
lastSeg->curveto((*cubic)[1],(*cubic)[3],(*cubic)[3]);
if( tmpCurve->get_segment_count() == 1){
tmpCurve = lastSeg;
}else{
//we eliminate the last segment
tmpCurve->backspace();
//and we add it again with the recreation
tmpCurve->append_continuous(lastSeg, 0.0625);
}
}
if (this->sa->start) {
tmpCurve = tmpCurve->create_reverse();
}
this->overwriteCurve = tmpCurve;
}
void PenTool::_bspline_spiro_motion(bool shift){
if(!this->spiro && !this->bspline)
return;
using Geom::X;
using Geom::Y;
if(this->red_curve->is_empty()) return;
this->npoints = 5;
SPCurve *tmpCurve = new SPCurve();
this->p[2] = this->p[3] + (1./3)*(this->p[0] - this->p[3]);
this->p[2] = Geom::Point(this->p[2][X] + handleCubicGap,this->p[2][Y] + handleCubicGap);
if(this->green_curve->is_empty() && !this->sa){
this->p[1] = this->p[0] + (1./3)*(this->p[3] - this->p[0]);
this->p[1] = Geom::Point(this->p[1][X] + handleCubicGap,this->p[1][Y] + handleCubicGap);
}else if(!this->green_curve->is_empty()){
tmpCurve = this->green_curve->copy();
}else{
tmpCurve = this->overwriteCurve->copy();
if(this->sa->start)
tmpCurve = tmpCurve->create_reverse();
}
if(!tmpCurve->is_empty()){
Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*tmpCurve->last_segment());
if(cubic){
if(this->bspline){
SPCurve * WPower = new SPCurve();
Geom::D2< Geom::SBasis > SBasisWPower;
WPower->moveto(tmpCurve->last_segment()->finalPoint());
WPower->lineto(tmpCurve->last_segment()->initialPoint());
float WP = Geom::nearest_point((*cubic)[2],*WPower->first_segment());
WPower->reset();
WPower->moveto(this->red_curve->last_segment()->initialPoint());
WPower->lineto(this->red_curve->last_segment()->finalPoint());
SBasisWPower = WPower->first_segment()->toSBasis();
WPower->reset();
this->p[1] = SBasisWPower.valueAt(WP);
if(!Geom::are_near(this->p[1],this->p[0]))
this->p[1] = Geom::Point(this->p[1][X] + handleCubicGap,this->p[1][Y] + handleCubicGap);
if(shift)
this->p[2] = this->p[3];
}else{
this->p[1] = (*cubic)[3] + ((*cubic)[3] - (*cubic)[2] );
}
}else{
this->p[1] = this->p[0];
if(shift)
this->p[2] = this->p[3];
}
}
if(this->anchor_statusbar && !this->red_curve->is_empty()){
if(shift){
this->_bspline_spiro_end_anchor_off();
}else{
this->_bspline_spiro_end_anchor_on();
}
}
this->_bspline_spiro_build();
}
void PenTool::_bspline_spiro_end_anchor_on()
{
using Geom::X;
using Geom::Y;
this->p[2] = this->p[3] + (1./3)*(this->p[0] - this->p[3]);
this->p[2] = Geom::Point(this->p[2][X] + handleCubicGap,this->p[2][Y] + handleCubicGap);
SPCurve *tmpCurve = new SPCurve();
SPCurve *lastSeg = new SPCurve();
Geom::Point C(0,0);
bool reverse = false;
if( this->green_anchor && this->green_anchor->active ){
tmpCurve = this->green_curve->create_reverse();
if(this->green_curve->get_segment_count()==0){
return;
}
reverse = true;
} else if(this->sa){
tmpCurve = this->overwriteCurve->copy();
if(!this->sa->start){
tmpCurve = tmpCurve->create_reverse();
reverse = true;
}
}else{
return;
}
Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*tmpCurve->last_segment());
if(this->bspline){
C = tmpCurve->last_segment()->finalPoint() + (1./3)*(tmpCurve->last_segment()->initialPoint() - tmpCurve->last_segment()->finalPoint());
C = Geom::Point(C[X] + handleCubicGap,C[Y] + handleCubicGap);
}else{
C = this->p[3] + this->p[3] - this->p[2];
}
if(cubic){
lastSeg->moveto((*cubic)[0]);
lastSeg->curveto((*cubic)[1],C,(*cubic)[3]);
}else{
lastSeg->moveto(tmpCurve->last_segment()->initialPoint());
lastSeg->lineto(tmpCurve->last_segment()->finalPoint());
}
if( tmpCurve->get_segment_count() == 1){
tmpCurve = lastSeg;
}else{
//we eliminate the last segment
tmpCurve->backspace();
//and we add it again with the recreation
tmpCurve->append_continuous(lastSeg, 0.0625);
}
if (reverse) {
tmpCurve = tmpCurve->create_reverse();
}
if( this->green_anchor && this->green_anchor->active )
{
this->green_curve->reset();
this->green_curve = tmpCurve;
}else{
this->overwriteCurve->reset();
this->overwriteCurve = tmpCurve;
}
}
void PenTool::_bspline_spiro_end_anchor_off()
{
SPCurve *tmpCurve = new SPCurve();
SPCurve *lastSeg = new SPCurve();
bool reverse = false;
this->p[2] = this->p[3];
if( this->green_anchor && this->green_anchor->active ){
tmpCurve = this->green_curve->create_reverse();
if(this->green_curve->get_segment_count()==0){
return;
}
reverse = true;
} else if(this->sa){
tmpCurve = this->overwriteCurve->copy();
if(!this->sa->start){
tmpCurve = tmpCurve->create_reverse();
reverse = true;
}
}else{
return;
}
Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*tmpCurve->last_segment());
if(cubic){
lastSeg->moveto((*cubic)[0]);
lastSeg->curveto((*cubic)[1],(*cubic)[3],(*cubic)[3]);
}else{
lastSeg->moveto(tmpCurve->last_segment()->initialPoint());
lastSeg->lineto(tmpCurve->last_segment()->finalPoint());
}
if( tmpCurve->get_segment_count() == 1){
tmpCurve = lastSeg;
}else{
//we eliminate the last segment
tmpCurve->backspace();
//and we add it again with the recreation
tmpCurve->append_continuous(lastSeg, 0.0625);
}
if (reverse) {
tmpCurve = tmpCurve->create_reverse();
}
if( this->green_anchor && this->green_anchor->active )
{
this->green_curve->reset();
this->green_curve = tmpCurve;
}else{
this->overwriteCurve->reset();
this->overwriteCurve = tmpCurve;
}
}
//prepares the curves for its transformation into BSpline curve.
void PenTool::_bspline_spiro_build()
{
if(!this->spiro && !this->bspline){
return;
}
//We create the base curve
SPCurve *curve = new SPCurve();
//If we continuate the existing curve we add it at the start
if(this->sa && !this->sa->curve->is_empty()){
curve = this->overwriteCurve->copy();
if (this->sa->start) {
curve = curve->create_reverse();
}
}
if (!this->green_curve->is_empty()){
curve->append_continuous(this->green_curve, 0.0625);
}
//and the red one
if (!this->red_curve->is_empty()){
this->red_curve->reset();
this->red_curve->moveto(this->p[0]);
if(this->anchor_statusbar && !this->sa && !(this->green_anchor && this->green_anchor->active)){
this->red_curve->curveto(this->p[1],this->p[3],this->p[3]);
}else{
this->red_curve->curveto(this->p[1],this->p[2],this->p[3]);
}
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->red_bpath), this->red_curve);
curve->append_continuous(this->red_curve, 0.0625);
}
if(!curve->is_empty()){
// close the curve if the final points of the curve are close enough
if(Geom::are_near(curve->first_path()->initialPoint(), curve->last_path()->finalPoint())){
curve->closepath_current();
}
//TODO: CALL TO CLONED FUNCTION SPIRO::doEffect IN lpe-spiro.cpp
//For example
//using namespace Inkscape::LivePathEffect;
//LivePathEffectObject *lpeobj = static_cast<LivePathEffectObject*> (curve);
//Effect *spr = static_cast<Effect*> ( new LPEbspline(lpeobj) );
//spr->doEffect(curve);
if(this->bspline){
this->_bspline_doEffect(curve);
}else{
this->_spiro_doEffect(curve);
}
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->blue2_bpath), curve);
sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(this->blue2_bpath), this->blue_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
sp_canvas_item_show(this->blue2_bpath);
curve->unref();
this->blue2_curve->reset();
//We hide the holders that doesn't contribute anything
if(this->spiro){
sp_canvas_item_show(this->c1);
SP_CTRL(this->c1)->moveto(this->p[0]);
}else
sp_canvas_item_hide(this->c1);
sp_canvas_item_hide(this->cl1);
sp_canvas_item_hide(this->c0);
sp_canvas_item_hide(this->cl0);
}else{
//if the curve is empty
sp_canvas_item_hide(this->blue2_bpath);
}
}
void PenTool::_bspline_doEffect(SPCurve * curve)
{
// commenting the function doEffect in src/live_effects/lpe-bspline.cpp
Geom::PathVector const original_pathv = curve->get_pathvector();
if (curve->get_segment_count() < 1)
return;
curve->reset();
for(Geom::PathVector::const_iterator path_it = original_pathv.begin(); path_it != original_pathv.end(); ++path_it) {
if (path_it->empty())
continue;
Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
Geom::Path::const_iterator curve_endit = path_it->end_default(); // this determines when the loop has to stop
SPCurve *nCurve = new SPCurve();
Geom::Point previousNode(0,0);
Geom::Point node(0,0);
Geom::Point pointAt1(0,0);
Geom::Point pointAt2(0,0);
Geom::Point nextPointAt1(0,0);
Geom::Point nextPointAt2(0,0);
Geom::Point nextPointAt3(0,0);
Geom::D2< Geom::SBasis > SBasisIn;
Geom::D2< Geom::SBasis > SBasisOut;
Geom::D2< Geom::SBasis > SBasisHelper;
Geom::CubicBezier const *cubic = NULL;
if (path_it->closed()) {
const Geom::Curve &closingline = path_it->back_closed(); // the closing line segment is always of type Geom::LineSegment.
if (are_near(closingline.initialPoint(), closingline.finalPoint())) {
curve_endit = path_it->end_open();
}
}
while ( curve_it2 != curve_endit )
{
SPCurve * in = new SPCurve();
in->moveto(curve_it1->initialPoint());
in->lineto(curve_it1->finalPoint());
cubic = dynamic_cast<Geom::CubicBezier const*>(&*curve_it1);
if(cubic){
SBasisIn = in->first_segment()->toSBasis();
pointAt1 = SBasisIn.valueAt(Geom::nearest_point((*cubic)[1],*in->first_segment()));
pointAt2 = SBasisIn.valueAt(Geom::nearest_point((*cubic)[2],*in->first_segment()));
}else{
pointAt1 = in->first_segment()->initialPoint();
pointAt2 = in->first_segment()->finalPoint();
}
in->reset();
delete in;
SPCurve * out = new SPCurve();
out->moveto(curve_it2->initialPoint());
out->lineto(curve_it2->finalPoint());
cubic = dynamic_cast<Geom::CubicBezier const*>(&*curve_it2);
if(cubic){
SBasisOut = out->first_segment()->toSBasis();
nextPointAt1 = SBasisOut.valueAt(Geom::nearest_point((*cubic)[1],*out->first_segment()));
nextPointAt2 = SBasisOut.valueAt(Geom::nearest_point((*cubic)[2],*out->first_segment()));;
nextPointAt3 = (*cubic)[3];
}else{
nextPointAt1 = out->first_segment()->initialPoint();
nextPointAt2 = out->first_segment()->finalPoint();
nextPointAt3 = out->first_segment()->finalPoint();
}
out->reset();
delete out;
SPCurve *lineHelper = new SPCurve();
lineHelper->moveto(pointAt2);
lineHelper->lineto(nextPointAt1);
SBasisHelper = lineHelper->first_segment()->toSBasis();
lineHelper->reset();
delete lineHelper;
previousNode = node;
node = SBasisHelper.valueAt(0.5);
SPCurve *curveHelper = new SPCurve();
curveHelper->moveto(previousNode);
curveHelper->curveto(pointAt1, pointAt2, node);
nCurve->append_continuous(curveHelper, 0.0625);
curveHelper->reset();
delete curveHelper;
++curve_it1;
++curve_it2;
}
SPCurve *out = new SPCurve();
out->moveto(curve_it1->initialPoint());
out->lineto(curve_it1->finalPoint());
cubic = dynamic_cast<Geom::CubicBezier const *>(&*curve_it1);
if (cubic) {
SBasisOut = out->first_segment()->toSBasis();
nextPointAt1 = SBasisOut.valueAt(Geom::nearest_point((*cubic)[1], *out->first_segment()));
nextPointAt2 = SBasisOut.valueAt(Geom::nearest_point((*cubic)[2], *out->first_segment()));
nextPointAt3 = out->first_segment()->finalPoint();
} else {
nextPointAt1 = out->first_segment()->initialPoint();
nextPointAt2 = out->first_segment()->finalPoint();
nextPointAt3 = out->first_segment()->finalPoint();
}
out->reset();
delete out;
SPCurve *curveHelper = new SPCurve();
curveHelper->moveto(node);
Geom::Point startNode = path_it->begin()->initialPoint();
if (path_it->closed()) {
SPCurve * start = new SPCurve();
start->moveto(path_it->begin()->initialPoint());
start->lineto(path_it->begin()->finalPoint());
Geom::D2< Geom::SBasis > SBasisStart = start->first_segment()->toSBasis();
SPCurve *lineHelper = new SPCurve();
cubic = dynamic_cast<Geom::CubicBezier const*>(&*path_it->begin());
if(cubic){
lineHelper->moveto(SBasisStart.valueAt(Geom::nearest_point((*cubic)[1],*start->first_segment())));
}else{
lineHelper->moveto(start->first_segment()->initialPoint());
}
start->reset();
delete start;
SPCurve * end = new SPCurve();
end->moveto(curve_it1->initialPoint());
end->lineto(curve_it1->finalPoint());
Geom::D2< Geom::SBasis > SBasisEnd = end->first_segment()->toSBasis();
cubic = dynamic_cast<Geom::CubicBezier const*>(&*curve_it1);
if(cubic){
lineHelper->lineto(SBasisEnd.valueAt(Geom::nearest_point((*cubic)[2],*end->first_segment())));
}else{
lineHelper->lineto(end->first_segment()->finalPoint());
}
end->reset();
delete end;
SBasisHelper = lineHelper->first_segment()->toSBasis();
lineHelper->reset();
delete lineHelper;
startNode = SBasisHelper.valueAt(0.5);
curveHelper->curveto(nextPointAt1, nextPointAt2, startNode);
nCurve->append_continuous(curveHelper, 0.0625);
nCurve->move_endpoints(startNode,startNode);
}else{
SPCurve * start = new SPCurve();
start->moveto(path_it->begin()->initialPoint());
start->lineto(path_it->begin()->finalPoint());
startNode = start->first_segment()->initialPoint();
start->reset();
delete start;
curveHelper->curveto(nextPointAt1, nextPointAt2, nextPointAt3);
nCurve->append_continuous(curveHelper, 0.0625);
nCurve->move_endpoints(startNode,nextPointAt3);
}
curveHelper->reset();
delete curveHelper;
if (path_it->closed()) {
nCurve->closepath_current();
}
curve->append(nCurve,false);
nCurve->reset();
delete nCurve;
}
}
//Spiro function cloned from lpe-spiro.cpp
// commenting the function "doEffect" from src/live_effects/lpe-spiro.cpp
void PenTool::_spiro_doEffect(SPCurve * curve)
{
using Geom::X;
using Geom::Y;
Geom::PathVector const original_pathv = curve->get_pathvector();
guint len = curve->get_segment_count() + 2;
curve->reset();
Spiro::spiro_cp *path = g_new (Spiro::spiro_cp, len);
int ip = 0;
for(Geom::PathVector::const_iterator path_it = original_pathv.begin(); path_it != original_pathv.end(); ++path_it) {
if (path_it->empty())
continue;
{
Geom::Point p = path_it->front().pointAt(0);
path[ip].x = p[X];
path[ip].y = p[Y];
path[ip].ty = '{' ;
ip++;
}
Geom::Path::const_iterator curve_it1 = path_it->begin();
Geom::Path::const_iterator curve_it2 = ++(path_it->begin());
Geom::Path::const_iterator curve_endit = path_it->end_default();
if (path_it->closed()) {
const Geom::Curve &closingline = path_it->back_closed();
if (are_near(closingline.initialPoint(), closingline.finalPoint())) {
curve_endit = path_it->end_open();
}
}
while ( curve_it2 != curve_endit )
{
Geom::Point p = curve_it1->finalPoint();
path[ip].x = p[X];
path[ip].y = p[Y];
bool this_is_line = is_straight_curve(*curve_it1);
bool next_is_line = is_straight_curve(*curve_it2);
Geom::NodeType nodetype = Geom::get_nodetype(*curve_it1, *curve_it2);
if ( nodetype == Geom::NODE_SMOOTH || nodetype == Geom::NODE_SYMM )
{
if (this_is_line && !next_is_line) {
path[ip].ty = ']';
} else if (next_is_line && !this_is_line) {
path[ip].ty = '[';
} else {
path[ip].ty = 'c';
}
} else {
path[ip].ty = 'v';
}
++curve_it1;
++curve_it2;
ip++;
}
Geom::Point p = curve_it1->finalPoint();
path[ip].x = p[X];
path[ip].y = p[Y];
if (path_it->closed()) {
Geom::NodeType nodetype = Geom::get_nodetype(*curve_it1, path_it->front());
switch (nodetype) {
case Geom::NODE_NONE:
path[ip].ty = '}';
ip++;
break;
case Geom::NODE_CUSP:
path[0].ty = path[ip].ty = 'v';
break;
case Geom::NODE_SMOOTH:
case Geom::NODE_SYMM:
path[0].ty = path[ip].ty = 'c';
break;
}
} else {
path[ip].ty = '}';
ip++;
}
int sp_len = ip;
Spiro::spiro_run(path, sp_len, *curve);
ip = 0;
}
g_free (path);
}
void PenTool::_setSubsequentPoint(Geom::Point const p, bool statusbar, guint status) {
g_assert( this->npoints != 0 );
// todo: Check callers to see whether 2 <= npoints is guaranteed.
this->p[2] = p;
this->p[3] = p;
this->p[4] = p;
this->npoints = 5;
this->red_curve->reset();
bool is_curve;
this->red_curve->moveto(this->p[0]);
if (this->polylines_paraxial && !statusbar) {
// we are drawing horizontal/vertical lines and hit an anchor;
Geom::Point const origin = this->p[0];
// if the previous point and the anchor are not aligned either horizontally or vertically...
if ((std::abs(p[Geom::X] - origin[Geom::X]) > 1e-9) && (std::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;
this->_setToNearestHorizVert(intermed, status, false);
this->red_curve->lineto(intermed);
}
this->red_curve->lineto(p);
is_curve = false;
} else {
// one of the 'regular' modes
if (this->p[1] != this->p[0] || this->spiro) {
this->red_curve->curveto(this->p[1], p, p);
is_curve = true;
} else {
this->red_curve->lineto(p);
is_curve = false;
}
}
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->red_bpath), this->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");
if(this->spiro || this->bspline){
message = is_curve ?
_("<b>Curve segment</b>: angle %3.2f&#176;, distance %s; with <b>Shift+Click</b> make a cusp node, <b>Enter</b> to finish the path" ):
_("<b>Line segment</b>: angle %3.2f&#176;, distance %s; with <b>Shift+Click</b> make a cusp node, <b>Enter</b> to finish the path");
}
this->_setAngleDistanceStatusMessage(p, 0, message);
}
}
void PenTool::_setCtrl(Geom::Point const p, guint const state) {
sp_canvas_item_show(this->c1);
sp_canvas_item_show(this->cl1);
if ( this->npoints == 2 ) {
this->p[1] = p;
sp_canvas_item_hide(this->c0);
sp_canvas_item_hide(this->cl0);
SP_CTRL(this->c1)->moveto(this->p[1]);
this->cl1->setCoords(this->p[0], this->p[1]);
this->_setAngleDistanceStatusMessage(p, 0, _("<b>Curve handle</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle"));
} else if ( this->npoints == 5 ) {
this->p[4] = p;
sp_canvas_item_show(this->c0);
sp_canvas_item_show(this->cl0);
bool is_symm = false;
if ( ( ( this->mode == PenTool::MODE_CLICK ) && ( state & GDK_CONTROL_MASK ) ) ||
( ( this->mode == PenTool::MODE_DRAG ) && !( state & GDK_SHIFT_MASK ) ) ) {
Geom::Point delta = p - this->p[3];
this->p[2] = this->p[3] - delta;
is_symm = true;
this->red_curve->reset();
this->red_curve->moveto(this->p[0]);
this->red_curve->curveto(this->p[1], this->p[2], this->p[3]);
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->red_bpath), this->red_curve);
}
SP_CTRL(this->c0)->moveto(this->p[2]);
this->cl0 ->setCoords(this->p[3], this->p[2]);
SP_CTRL(this->c1)->moveto(this->p[4]);
this->cl1->setCoords(this->p[3], this->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");
this->_setAngleDistanceStatusMessage(p, 3, message);
} else {
g_warning("Something bad happened - npoints is %d", this->npoints);
}
}
void PenTool::_finishSegment(Geom::Point const p, guint const state) {
if (this->polylines_paraxial) {
pen_last_paraxial_dir = this->nextParaxialDirection(p, this->p[0], state);
}
++num_clicks;
if (!this->red_curve->is_empty()) {
this->_bspline_spiro(state & GDK_SHIFT_MASK);
this->green_curve->append_continuous(this->red_curve, 0.0625);
SPCurve *curve = this->red_curve->copy();
/// \todo fixme:
SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(this->desktop), curve);
curve->unref();
sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), this->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
this->green_bpaths = g_slist_prepend(this->green_bpaths, cshape);
this->p[0] = this->p[3];
this->p[1] = this->p[4];
this->npoints = 2;
this->red_curve->reset();
}
}
void PenTool::_finish(gboolean const closed) {
if (this->expecting_clicks_for_LPE > 1) {
// don't let the path be finished before we have collected the required number of mouse clicks
return;
}
this->num_clicks = 0;
this->_disableEvents();
this->message_context->clear();
desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Drawing finished"));
// cancelate line without a created segment
this->red_curve->reset();
spdc_concat_colors_and_flush(this, closed);
this->overwriteCurve = NULL;
this->sa = NULL;
this->ea = NULL;
this->npoints = 0;
this->state = PenTool::POINT;
sp_canvas_item_hide(this->c0);
sp_canvas_item_hide(this->c1);
sp_canvas_item_hide(this->cl0);
sp_canvas_item_hide(this->cl1);
if (this->green_anchor) {
this->green_anchor = sp_draw_anchor_destroy(this->green_anchor);
}
this->desktop->canvas->endForcedFullRedraws();
this->_enableEvents();
}
void PenTool::_disableEvents() {
this->events_disabled = true;
}
void PenTool::_enableEvents() {
g_return_if_fail(this->events_disabled != 0);
this->events_disabled = false;
}
void PenTool::waitForLPEMouseClicks(Inkscape::LivePathEffect::EffectType effect_type, unsigned int num_clicks, bool use_polylines) {
if (effect_type == Inkscape::LivePathEffect::INVALID_LPE)
return;
this->waiting_LPE_type = effect_type;
this->expecting_clicks_for_LPE = num_clicks;
this->polylines_only = use_polylines;
this->polylines_paraxial = false; // TODO: think if this is correct for all cases
}
int PenTool::nextParaxialDirection(Geom::Point const &pt, Geom::Point const &origin, guint state) const {
//
// 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 (this->num_clicks == 0) {
if (this->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 PenTool::_setToNearestHorizVert(Geom::Point &pt, guint const state, bool snap) const {
Geom::Point const origin = this->p[0];
int next_dir = this->nextParaxialDirection(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 = this->desktop->namedview->snap_manager;
Inkscape::Selection *selection = sp_desktop_selection (this->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(this->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 :