#include <gdk/gdkkeysyms.h>

#include <boost/none_t.hpp>

#include "util/units.h"

#include "macros.h"

#include "display/curve.h"

#include "sp-shape.h"

#include "sp-text.h"

#include "sp-flowtext.h"

#include "text-editing.h"

#include "display/sp-ctrlline.h"

#include "display/sodipodi-ctrl.h"

#include "display/sp-canvas-item.h"

#include "display/sp-canvas-util.h"

#include "desktop.h"

#include "document.h"

#include "pixmaps/cursor-measure.xpm"

#include "preferences.h"

#include "inkscape.h"

#include "ui/tools/measure-tool.h"

#include "ui/tools/freehand-base.h"

#include "display/canvas-text.h"

#include "path-chemistry.h"

#include "2geom/line.h"

#include <2geom/path-intersection.h>

#include <2geom/pathvector.h>

#include <2geom/crossing.h>

#include <2geom/angle.h>

#include "snap.h"

#include "sp-namedview.h"

#include "enums.h"

#include "ui/control-manager.h"

#include "knot-enums.h"

using Inkscape::ControlManager;

using Inkscape::CTLINE_SECONDARY;

using Inkscape::Util::unit_table;

#include "ui/tool-factory.h"

namespace Inkscape {

namespace UI {

namespace Tools {

std::vector<Inkscape::Display::TemporaryItem*> measure_tmp_items;

namespace {

ToolBase* createMeasureContext() {

return new MeasureTool();

}

bool measureContextRegistered = ToolFactory::instance().registerObject("/tools/measure", createMeasureContext);

}

const std::string& MeasureTool::getPrefsPath() {

return MeasureTool::prefsPath;

}

const std::string MeasureTool::prefsPath = "/tools/measure";

{

gint const DIMENSION_OFFSET = 35;

class LabelPlacement {

public:

double lengthVal;

double offset;

Geom::Point start;

Geom::Point end;

};

bool SortLabelPlacement(LabelPlacement const &first, LabelPlacement const &second)

{

if (first.end[Geom::Y] == second.end[Geom::Y]) {

return first.end[Geom::X] < second.end[Geom::X];

} else {

return first.end[Geom::Y] < second.end[Geom::Y];

}

}

void repositionOverlappingLabels(std::vector<LabelPlacement> &placements, SPDesktop *desktop, Geom::Point const &normal, double fontsize)

{

std::sort(placements.begin(), placements.end(), SortLabelPlacement);

double border = 3;

Geom::Rect box;

{

Geom::Point tmp(fontsize * 8 + (border * 2), fontsize + (border * 2));

tmp = desktop->w2d(tmp);

box = Geom::Rect(-tmp[Geom::X] / 2, -tmp[Geom::Y] / 2, tmp[Geom::X] / 2, tmp[Geom::Y] / 2);

}

// Using index since vector may be re-ordered as we go.

// Starting at one, since the first item can't overlap itself

for (size_t i = 1; i < placements.size(); i++) {

LabelPlacement &place = placements[i];

bool changed = false;

do {

Geom::Rect current(box + place.end);

changed = false;

bool overlaps = false;

for (size_t j = i; (j > 0) && !overlaps; --j) {

LabelPlacement &otherPlace = placements[j - 1];

Geom::Rect target(box + otherPlace.end);

if (current.intersects(target)) {

overlaps = true;

}

}

if (overlaps) {

place.offset += (fontsize + border);

place.end = place.start - desktop->w2d(normal * place.offset);

changed = true;

}

} while (changed);

std::sort(placements.begin(), placements.begin() + i + 1, SortLabelPlacement);

}

}

Geom::Point calcAngleDisplayAnchor(SPDesktop *desktop, double angle, double baseAngle,

Geom::Point const &startPoint, Geom::Point const &endPoint,

double fontsize)

{

// Time for the trick work of figuring out where things should go, and how.

double lengthVal = (endPoint - startPoint).length();

double effective = baseAngle + (angle / 2);

Geom::Point where(lengthVal, 0);

where *= Geom::Affine(Geom::Rotate(effective)) * Geom::Affine(Geom::Translate(startPoint));

// When the angle is tight, the label would end up under the cursor and/or lines. Bump it

double scaledFontsize = std::abs(fontsize * desktop->w2d(Geom::Point(0, 1.0))[Geom::Y]);

if (std::abs((where - endPoint).length()) < scaledFontsize) {

where[Geom::Y] += scaledFontsize * 2;

}

// We now have the ideal position, but need to see if it will fit/work.

Geom::Rect visibleArea = desktop->get_display_area();

// Bring it in to "title safe" for the anchor point

Geom::Point textBox = desktop->w2d(Geom::Point(fontsize * 3, fontsize / 2));

textBox[Geom::Y] = std::abs(textBox[Geom::Y]);

visibleArea = Geom::Rect(visibleArea.min()[Geom::X] + textBox[Geom::X],

visibleArea.min()[Geom::Y] + textBox[Geom::Y],

visibleArea.max()[Geom::X] - textBox[Geom::X],

visibleArea.max()[Geom::Y] - textBox[Geom::Y]);

where[Geom::X] = std::min(where[Geom::X], visibleArea.max()[Geom::X]);

where[Geom::X] = std::max(where[Geom::X], visibleArea.min()[Geom::X]);

where[Geom::Y] = std::min(where[Geom::Y], visibleArea.max()[Geom::Y]);

where[Geom::Y] = std::max(where[Geom::Y], visibleArea.min()[Geom::Y]);

return where;

}

void createAngleDisplayCurve(SPDesktop *desktop, Geom::Point const &center, Geom::Point const &end, Geom::Point const &anchor, double angle)

{

// Given that we have a point on the arc's edge and the angle of the arc, we need to get the two endpoints.

double textLen = std::abs((anchor - center).length());

double sideLen = std::abs((end - center).length());

if (sideLen > 0.0) {

double factor = std::min(1.0, textLen / sideLen);

// arc start

Geom::Point p1 = end * (Geom::Affine(Geom::Translate(-center))

* Geom::Affine(Geom::Scale(factor))

* Geom::Affine(Geom::Translate(center)));

// arc end

Geom::Point p4 = p1 * (Geom::Affine(Geom::Translate(-center))

* Geom::Affine(Geom::Rotate(-angle))

* Geom::Affine(Geom::Translate(center)));

// from Riskus

double xc = center[Geom::X];

double yc = center[Geom::Y];

double ax = p1[Geom::X] - xc;

double ay = p1[Geom::Y] - yc;

double bx = p4[Geom::X] - xc;

double by = p4[Geom::Y] - yc;

double q1 = (ax * ax) + (ay * ay);

double q2 = q1 + (ax * bx) + (ay * by);

double k2 = (4.0 / 3.0) * (std::sqrt(2 * q1 * q2) - q2) / ((ax * by) - (ay * bx));

Geom::Point p2(xc + ax - (k2 * ay),

yc + ay + (k2 * ax));

Geom::Point p3(xc + bx + (k2 * by),

yc + by - (k2 * bx));

SPCtrlCurve *curve = ControlManager::getManager().createControlCurve(desktop->getTempGroup(), p1, p2, p3, p4, CTLINE_SECONDARY);

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(SP_CANVAS_ITEM(curve), 0, true));

}

}

} // namespace

MeasureTool::MeasureTool()

: ToolBase(cursor_measure_xpm, 4, 4)

, grabbed(NULL)

{

}

MeasureTool::~MeasureTool() {

}

void MeasureTool::finish() {

this->enableGrDrag(false);

if (this->grabbed) {

sp_canvas_item_ungrab(this->grabbed, GDK_CURRENT_TIME);

this->grabbed = NULL;

}

ToolBase::finish();

}

static void calculate_intersections(SPDesktop * /*desktop*/, SPItem* item, Geom::PathVector const &lineseg, SPCurve *curve, std::vector<double> &intersections)

{

curve->transform(item->i2doc_affine());

// Find all intersections of the control-line with this shape

Geom::CrossingSet cs = Geom::crossings(lineseg, curve->get_pathvector());

Geom::delete_duplicates(cs[0]);

// Reconstruct and store the points of intersection

for (Geom::Crossings::const_iterator m = cs[0].begin(); m != cs[0].end(); ++m) {

#if 0

Geom::Point intersection = lineseg[0].pointAt((*m).ta);

double eps = 0.0001;

SPDocument* doc = desktop->getDocument();

if (((*m).ta > eps &&

item == doc->getItemAtPoint(desktop->dkey, lineseg[0].pointAt((*m).ta - eps), false, NULL)) ||

((*m).ta + eps < 1 &&

item == doc->getItemAtPoint(desktop->dkey, lineseg[0].pointAt((*m).ta + eps), false, NULL)) ) {

intersections.push_back((*m).ta);

}

#else

intersections.push_back((*m).ta);

#endif

}

}

bool MeasureTool::root_handler(GdkEvent* event) {

Inkscape::Preferences *prefs = Inkscape::Preferences::get();

tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);

gint ret = FALSE;

switch (event->type) {

case GDK_BUTTON_PRESS: {

Geom::Point const button_w(event->button.x, event->button.y);

explicitBase = boost::none;

lastEnd = boost::none;

start_point = desktop->w2d(button_w);

if (event->button.button == 1 && !this->space_panning) {

// save drag origin

xp = static_cast<gint>(event->button.x);

yp = static_cast<gint>(event->button.y);

within_tolerance = true;

ret = TRUE;

}

SnapManager &m = desktop->namedview->snap_manager;

m.setup(desktop);

m.freeSnapReturnByRef(start_point, Inkscape::SNAPSOURCE_OTHER_HANDLE);

m.unSetup();

sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),

GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK,

NULL, event->button.time);

this->grabbed = SP_CANVAS_ITEM(desktop->acetate);

break;

}

case GDK_KEY_PRESS: {

if ((event->key.keyval == GDK_KEY_Shift_L) || (event->key.keyval == GDK_KEY_Shift_R)) {

if (lastEnd) {

explicitBase = lastEnd;

}

}

break;

}

case GDK_MOTION_NOTIFY: {

if (!((event->motion.state & GDK_BUTTON1_MASK) && !this->space_panning)) {

if (!(event->motion.state & GDK_SHIFT_MASK)) {

Geom::Point const motion_w(event->motion.x, event->motion.y);

Geom::Point const motion_dt(desktop->w2d(motion_w));

SnapManager &m = desktop->namedview->snap_manager;

m.setup(desktop);

Inkscape::SnapCandidatePoint scp(motion_dt, Inkscape::SNAPSOURCE_OTHER_HANDLE);

scp.addOrigin(start_point);

m.preSnap(scp);

m.unSetup();

}

} else {

ret = TRUE;

if ( within_tolerance

&& ( abs( static_cast<gint>(event->motion.x) - xp ) < tolerance )

&& ( abs( static_cast<gint>(event->motion.y) - yp ) < tolerance ) ) {

break; // do not drag if we're within tolerance from origin

}

// Once the user has moved farther than tolerance from the original location

// (indicating they intend to move the object, not click), then always process the

// motion notify coordinates as given (no snapping back to origin)

within_tolerance = false;

//clear previous temporary canvas items, we'll draw new ones

for (size_t idx = 0; idx < measure_tmp_items.size(); ++idx) {

desktop->remove_temporary_canvasitem(measure_tmp_items[idx]);

}

measure_tmp_items.clear();

Geom::Point const motion_w(event->motion.x, event->motion.y);

Geom::Point const motion_dt(desktop->w2d(motion_w));

Geom::Point end_point = motion_dt;

if (event->motion.state & GDK_CONTROL_MASK) {

spdc_endpoint_snap_rotation(this, end_point, start_point, event->motion.state);

} else {

if (!(event->motion.state & GDK_SHIFT_MASK)) {

SnapManager &m = desktop->namedview->snap_manager;

m.setup(desktop);

Inkscape::SnapCandidatePoint scp(end_point, Inkscape::SNAPSOURCE_OTHER_HANDLE);

scp.addOrigin(start_point);

Inkscape::SnappedPoint sp = m.freeSnap(scp);

end_point = sp.getPoint();

m.unSetup();

}

}

Geom::PathVector lineseg;

Geom::Path p;

p.start(desktop->dt2doc(start_point));

p.appendNew<Geom::LineSegment>(desktop->dt2doc(end_point));

lineseg.push_back(p);

double deltax = end_point[Geom::X] - start_point[Geom::X];

double deltay = end_point[Geom::Y] - start_point[Geom::Y];

double angle = atan2(deltay, deltax);

double baseAngle = 0;

if (explicitBase) {

double deltax2 = explicitBase.get()[Geom::X] - start_point[Geom::X];

double deltay2 = explicitBase.get()[Geom::Y] - start_point[Geom::Y];

baseAngle = atan2(deltay2, deltax2);

angle -= baseAngle;

if (angle < -M_PI) {

angle += 2 * M_PI;

} else if (angle > M_PI) {

angle -= 2 * M_PI;

}

}

#define NPOINTS 800

std::vector<Geom::Point> points;

for (double i = 0; i < NPOINTS; i++) {

points.push_back(desktop->d2w(start_point + (i / NPOINTS) * (end_point - start_point)));

}

// TODO: Felipe, why don't you simply iterate over all items, and test whether their bounding boxes intersect

// with the measurement line, instead of interpolating over 800 points? E.g. bbox_of_measurement_line.intersects(*bbox_of_item).

// That's also how the object-snapper works, see _findCandidates() in object-snapper.cpp.

// TODO switch to a different variable name. The single letter 'l' is easy to misread.

//select elements crossed by line segment:

GSList *items = desktop->getDocument()->getItemsAtPoints(desktop->dkey, points);

std::vector<double> intersection_times;

for (GSList *l = items; l != NULL; l = l->next) {

SPItem *item = static_cast<SPItem*>(l->data);

if (SP_IS_SHAPE(item)) {

calculate_intersections(desktop, item, lineseg, SP_SHAPE(item)->getCurve(), intersection_times);

} else {

if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {

Inkscape::Text::Layout::iterator iter = te_get_layout(item)->begin();

do {

Inkscape::Text::Layout::iterator iter_next = iter;

iter_next.nextGlyph(); // iter_next is one glyph ahead from iter

if (iter == iter_next) {

break;

}

// get path from iter to iter_next:

SPCurve *curve = te_get_layout(item)->convertToCurves(iter, iter_next);

iter = iter_next; // shift to next glyph

if (!curve) {

continue; // error converting this glyph

}

if (curve->is_empty()) { // whitespace glyph?

curve->unref();

continue;

}

curve->transform(item->i2doc_affine());

calculate_intersections(desktop, item, lineseg, curve, intersection_times);

if (iter == te_get_layout(item)->end()) {

break;

}

} while (true);

}

}

}

Inkscape::Preferences *prefs = Inkscape::Preferences::get();

if (!prefs->getBool("/tools/measure/ignore_1st_and_last", true)) {

intersection_times.push_back(0);

intersection_times.push_back(1);

}

Glib::ustring unit_name = prefs->getString("/tools/measure/unit");

if (!unit_name.compare("")) {

unit_name = "px";

}

double fontsize = prefs->getInt("/tools/measure/fontsize");

// Normal will be used for lines and text

Geom::Point windowNormal = Geom::unit_vector(Geom::rot90(desktop->d2w(end_point - start_point)));

Geom::Point normal = desktop->w2d(windowNormal);

std::vector<Geom::Point> intersections;

std::sort(intersection_times.begin(), intersection_times.end());

for (std::vector<double>::iterator iter_t = intersection_times.begin(); iter_t != intersection_times.end(); iter_t++) {

intersections.push_back(lineseg[0].pointAt(*iter_t));

}

std::vector<LabelPlacement> placements;

for (size_t idx = 1; idx < intersections.size(); ++idx) {

LabelPlacement placement;

placement.lengthVal = (intersections[idx] - intersections[idx - 1]).length();

placement.lengthVal = Inkscape::Util::Quantity::convert(placement.lengthVal, "px", unit_name);

placement.offset = DIMENSION_OFFSET;

placement.start = desktop->doc2dt( (intersections[idx - 1] + intersections[idx]) / 2 );

placement.end = placement.start - (normal * placement.offset);

placements.push_back(placement);

}

// Adjust positions

repositionOverlappingLabels(placements, desktop, windowNormal, fontsize);

for (std::vector<LabelPlacement>::iterator it = placements.begin(); it != placements.end(); ++it)

{

LabelPlacement &place = *it;

// TODO cleanup memory, Glib::ustring, etc.:

gchar *measure_str = g_strdup_printf("%.2f %s", place.lengthVal, unit_name.c_str());

SPCanvasText *canvas_tooltip = sp_canvastext_new(desktop->getTempGroup(),

desktop,

place.end,

measure_str);

sp_canvastext_set_fontsize(canvas_tooltip, fontsize);

canvas_tooltip->rgba = 0xffffffff;

canvas_tooltip->rgba_background = 0x0000007f;

canvas_tooltip->outline = false;

canvas_tooltip->background = true;

canvas_tooltip->anchor_position = TEXT_ANCHOR_CENTER;

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(canvas_tooltip, 0));

g_free(measure_str);

}

Geom::Point angleDisplayPt = calcAngleDisplayAnchor(desktop, angle, baseAngle,

start_point, end_point,

fontsize);

{

// TODO cleanup memory, Glib::ustring, etc.:

gchar *angle_str = g_strdup_printf("%.2f °", angle * 180/M_PI);

SPCanvasText *canvas_tooltip = sp_canvastext_new(desktop->getTempGroup(),

desktop,

angleDisplayPt,

angle_str);

sp_canvastext_set_fontsize(canvas_tooltip, fontsize);

canvas_tooltip->rgba = 0xffffffff;

canvas_tooltip->rgba_background = 0x337f337f;

canvas_tooltip->outline = false;

canvas_tooltip->background = true;

canvas_tooltip->anchor_position = TEXT_ANCHOR_CENTER;

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(canvas_tooltip, 0));

g_free(angle_str);

}

{

double totallengthval = (end_point - start_point).length();

totallengthval = Inkscape::Util::Quantity::convert(totallengthval, "px", unit_name);

// TODO cleanup memory, Glib::ustring, etc.:

gchar *totallength_str = g_strdup_printf("%.2f %s", totallengthval, unit_name.c_str());

SPCanvasText *canvas_tooltip = sp_canvastext_new(desktop->getTempGroup(),

desktop,

end_point + desktop->w2d(Geom::Point(3*fontsize, -fontsize)),

totallength_str);

sp_canvastext_set_fontsize(canvas_tooltip, fontsize);

canvas_tooltip->rgba = 0xffffffff;

canvas_tooltip->rgba_background = 0x3333337f;

canvas_tooltip->outline = false;

canvas_tooltip->background = true;

canvas_tooltip->anchor_position = TEXT_ANCHOR_LEFT;

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(canvas_tooltip, 0));

g_free(totallength_str);

}

if (intersections.size() > 2) {

double totallengthval = (intersections[intersections.size()-1] - intersections[0]).length();

totallengthval = Inkscape::Util::Quantity::convert(totallengthval, "px", unit_name);

// TODO cleanup memory, Glib::ustring, etc.:

gchar *total_str = g_strdup_printf("%.2f %s", totallengthval, unit_name.c_str());

SPCanvasText *canvas_tooltip = sp_canvastext_new(desktop->getTempGroup(),

desktop,

desktop->doc2dt((intersections[0] + intersections[intersections.size()-1])/2) + normal * 60,

total_str);

sp_canvastext_set_fontsize(canvas_tooltip, fontsize);

canvas_tooltip->rgba = 0xffffffff;

canvas_tooltip->rgba_background = 0x33337f7f;

canvas_tooltip->outline = false;

canvas_tooltip->background = true;

canvas_tooltip->anchor_position = TEXT_ANCHOR_CENTER;

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(canvas_tooltip, 0));

g_free(total_str);

}

// Now that text has been added, we can add lines and controls so that they go underneath

for (size_t idx = 0; idx < intersections.size(); ++idx) {

// Display the intersection indicator (i.e. the cross)

SPCanvasItem * canvasitem = sp_canvas_item_new(desktop->getTempGroup(),

SP_TYPE_CTRL,

"anchor", SP_ANCHOR_CENTER,

"size", 8.0,

"stroked", TRUE,

"stroke_color", 0xff0000ff,

"mode", SP_KNOT_MODE_XOR,

"shape", SP_KNOT_SHAPE_CROSS,

NULL );

SP_CTRL(canvasitem)->moveto(desktop->doc2dt(intersections[idx]));

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(canvasitem, 0));

}

// Since adding goes to the bottom, do all lines last.

// draw main control line

{

SPCtrlLine *control_line = ControlManager::getManager().createControlLine(desktop->getTempGroup(),

start_point,

end_point);

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(control_line, 0));

if ((end_point[Geom::X] != start_point[Geom::X]) && (end_point[Geom::Y] != start_point[Geom::Y])) {

double length = std::abs((end_point - start_point).length());

Geom::Point anchorEnd = start_point;

anchorEnd[Geom::X] += length;

if (explicitBase) {

anchorEnd *= (Geom::Affine(Geom::Translate(-start_point))

* Geom::Affine(Geom::Rotate(baseAngle))

* Geom::Affine(Geom::Translate(start_point)));

}

SPCtrlLine *control_line = ControlManager::getManager().createControlLine(desktop->getTempGroup(),

start_point,

anchorEnd,

CTLINE_SECONDARY);

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(control_line, 0));

createAngleDisplayCurve(desktop, start_point, end_point, angleDisplayPt, angle);

}

}

if (intersections.size() > 2) {

ControlManager &mgr = ControlManager::getManager();

SPCtrlLine *control_line = 0;

control_line = mgr.createControlLine(desktop->getTempGroup(),

desktop->doc2dt(intersections[0]) + normal * 60,

desktop->doc2dt(intersections[intersections.size() - 1]) + normal * 60);

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(control_line, 0));

control_line = mgr.createControlLine(desktop->getTempGroup(),

desktop->doc2dt(intersections[0]),

desktop->doc2dt(intersections[0]) + normal * 65);

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(control_line, 0));

control_line = mgr.createControlLine(desktop->getTempGroup(),

desktop->doc2dt(intersections[intersections.size() - 1]),

desktop->doc2dt(intersections[intersections.size() - 1]) + normal * 65);

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(control_line, 0));

}

// call-out lines

for (std::vector<LabelPlacement>::iterator it = placements.begin(); it != placements.end(); ++it)

{

LabelPlacement &place = *it;

ControlManager &mgr = ControlManager::getManager();

SPCtrlLine *control_line = mgr.createControlLine(desktop->getTempGroup(),

place.start,

place.end,

CTLINE_SECONDARY);

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(control_line, 0));

}

{

for (size_t idx = 1; idx < intersections.size(); ++idx) {

Geom::Point measure_text_pos = (intersections[idx - 1] + intersections[idx]) / 2;

ControlManager &mgr = ControlManager::getManager();

SPCtrlLine *control_line = mgr.createControlLine(desktop->getTempGroup(),

desktop->doc2dt(measure_text_pos),

desktop->doc2dt(measure_text_pos) - (normal * DIMENSION_OFFSET),

CTLINE_SECONDARY);

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(control_line, 0));

}

}

// Initial point

{

SPCanvasItem * canvasitem = sp_canvas_item_new(desktop->getTempGroup(),

SP_TYPE_CTRL,

"anchor", SP_ANCHOR_CENTER,

"size", 8.0,

"stroked", TRUE,

"stroke_color", 0xff0000ff,

"mode", SP_KNOT_MODE_XOR,

"shape", SP_KNOT_SHAPE_CROSS,

NULL );

SP_CTRL(canvasitem)->moveto(start_point);

measure_tmp_items.push_back(desktop->add_temporary_canvasitem(canvasitem, 0));

}

lastEnd = end_point; // track in case we get a anchoring key-press later

gobble_motion_events(GDK_BUTTON1_MASK);

}

break;

}

case GDK_BUTTON_RELEASE: {

sp_event_context_discard_delayed_snap_event(this);

explicitBase = boost::none;

lastEnd = boost::none;

//clear all temporary canvas items related to the measurement tool.

for (size_t idx = 0; idx < measure_tmp_items.size(); ++idx) {

desktop->remove_temporary_canvasitem(measure_tmp_items[idx]);

}

measure_tmp_items.clear();

if (this->grabbed) {

sp_canvas_item_ungrab(this->grabbed, event->button.time);

this->grabbed = NULL;

}

xp = 0;

yp = 0;

break;

}

default:

break;

}

if (!ret) {

ret = ToolBase::root_handler(event);

}

return ret;

}

}

}

}