Moved and renamed some tool-related files.

(bzr r12785)

1 files changed, 0 insertions, 777 deletions

diff --git a/src/measure-context.cpp b/src/measure-context.cpp
deleted file mode 100644
index 11161dc8f..000000000
--- a/src/measure-context.cpp
+++ /dev/null
@@ -1,777 +0,0 @@
-/*
- * Our nice measuring tool
- *
- * Authors:
- *   Felipe Correa da Silva Sanches <juca@members.fsf.org>
- *   Jon A. Cruz <jon@joncruz.org>
- *
- * Copyright (C) 2011 Authors
- *
- * Released under GNU GPL, read the file 'COPYING' for more information
- */
-
-
-#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 "desktop-handles.h"
-#include "measure-context.h"
-#include "draw-context.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"
-
-using Inkscape::ControlManager;
-using Inkscape::CTLINE_SECONDARY;
-using Inkscape::Util::unit_table;
-
-#include "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";
-
-namespace
-{
-
-gint const DIMENSION_OFFSET = 35;
-
-/**
- * Simple class to use for removing label overlap.
- */
-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);
-    }
-}
-
-/**
- * Calculates where to place the anchor for the display text and arc.
- *
- * @param desktop the desktop that is being used.
- * @param angle the angle to be displaying.
- * @param baseAngle the angle of the initial baseline.
- * @param startPoint the point that is the vertex of the selected angle.
- * @param endPoint the point that is the end the user is manipulating for measurement.
- * @param fontsize the size to display the text label at.
- */
-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;
-}
-
-/**
- * Given an angle, the arc center and edge point, draw an arc segment centered around that edge point.
- *
- * @param desktop the desktop that is being used.
- * @param center the center point for the arc.
- * @param end the point that ends at the edge of the arc segment.
- * @param anchor the anchor point for displaying the text label.
- * @param angle the angle of the arc segment to draw.
- */
-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(sp_desktop_tempgroup(desktop), 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() {
-	this->grabbed = 0;
-
-    this->cursor_shape = cursor_measure_xpm;
-    this->hot_x = 4;
-    this->hot_y = 4;
-}
-
-MeasureTool::~MeasureTool() {
-}
-
-void MeasureTool::finish() {
-    this->enableGrDrag(false);
-
-    if (this->grabbed) {
-        sp_canvas_item_ungrab(this->grabbed, GDK_CURRENT_TIME);
-        this->grabbed = NULL;
-    }
-}
-
-//void MeasureTool::setup() {
-//	ToolBase* ec = this;
-//
-////    if (SP_EVENT_CONTEXT_CLASS(sp_measure_context_parent_class)->setup) {
-////        SP_EVENT_CONTEXT_CLASS(sp_measure_context_parent_class)->setup(ec);
-////    }
-//	ToolBase::setup();
-//}
-
-//gint MeasureTool::item_handler(SPItem* item, GdkEvent* event) {
-//    gint ret = FALSE;
-//
-////    if (SP_EVENT_CONTEXT_CLASS(sp_measure_context_parent_class)->item_handler) {
-////        ret = SP_EVENT_CONTEXT_CLASS(sp_measure_context_parent_class)->item_handler(event_context, item, event);
-////    }
-//    ret = ToolBase::item_handler(item, event);
-//
-//    return ret;
-//}
-
-static bool GeomPointSortPredicate(const Geom::Point& p1, const Geom::Point& p2)
-{
-    if (p1[Geom::Y] == p2[Geom::Y]) {
-        return p1[Geom::X] < p2[Geom::X];
-    } else {
-        return p1[Geom::Y] < p2[Geom::Y];
-    }
-}
-
-static void calculate_intersections(SPDesktop * /*desktop*/, SPItem* item, Geom::PathVector const &lineseg, SPCurve *curve, std::vector<Geom::Point> &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());
-
-    // Reconstruct and store the points of intersection
-    for (Geom::Crossings::const_iterator m = cs[0].begin(); m != cs[0].end(); ++m) {
-#if 0
-//TODO: consider only visible intersections
-        Geom::Point intersection = lineseg[0].pointAt((*m).ta);
-        double eps = 0.0001;
-        SPDocument* doc = sp_desktop_document(desktop);
-        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(intersection);
-        }
-#else
-        intersections.push_back(lineseg[0].pointAt((*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;
-                    }
-                }
-
-//TODO: calculate NPOINTS
-//800 seems to be a good value for 800x600 resolution
-#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? E.g. bbox_of_measurement_line.intersects(*bbox_of_item).
-// That's also how the object-snapper works, see _findCandidates() in object-snapper.cpp.
-
-                //select elements crossed by line segment:
-                GSList *items = sp_desktop_document(desktop)->getItemsAtPoints(desktop->dkey, points);
-                std::vector<Geom::Point> intersections;
-                Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-                bool ignore_1st_and_last = prefs->getBool("/tools/measure/ignore_1st_and_last", true);
-
-                if (!ignore_1st_and_last) {
-                    intersections.push_back(desktop->dt2doc(start_point));
-                }
-
-                std::vector<LabelPlacement> placements;
-
-                // TODO switch to a different variable name. The single letter 'l' is easy to misread.
-                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(), intersections);
-                    } 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, intersections);
-
-                                if (iter == te_get_layout(item)->end()) {
-                                    break;
-                                }
-                            } while (true);
-                        }
-                    }
-                }
-
-                if (!ignore_1st_and_last) {
-                    intersections.push_back(desktop->dt2doc(end_point));
-                }
-
-                //sort intersections
-                if (intersections.size() > 2) {
-                    std::sort(intersections.begin(), intersections.end(), GeomPointSortPredicate);
-                }
-
-                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);
-
-                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(sp_desktop_tempgroup(desktop),
-                                                                     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(sp_desktop_tempgroup(desktop),
-                                                                     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(sp_desktop_tempgroup(desktop),
-                                                                     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(sp_desktop_tempgroup(desktop),
-                                                                     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(sp_desktop_tempgroup(desktop),
-                                                                   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(sp_desktop_tempgroup(desktop),
-                                                                                              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(sp_desktop_tempgroup(desktop),
-                                                                                                  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(sp_desktop_tempgroup(desktop),
-                                                         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(sp_desktop_tempgroup(desktop),
-                                                         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(sp_desktop_tempgroup(desktop),
-                                                         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(sp_desktop_tempgroup(desktop),
-                                                                     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(sp_desktop_tempgroup(desktop),
-                                                                         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(sp_desktop_tempgroup(desktop),
-                                                                   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;
-}
-
-}
-}
-}
-
-/*
-  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 :