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Diffstat (limited to 'src/measure-context.cpp')
| -rw-r--r-- | src/measure-context.cpp | 511 |
1 files changed, 0 insertions, 511 deletions
diff --git a/src/measure-context.cpp b/src/measure-context.cpp deleted file mode 100644 index e522c44a5..000000000 --- a/src/measure-context.cpp +++ /dev/null @@ -1,511 +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 "helper/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" - - -static void sp_measure_context_class_init(SPMeasureContextClass *klass); -static void sp_measure_context_init(SPMeasureContext *measure_context); -static void sp_measure_context_setup(SPEventContext *ec); -static void sp_measure_context_finish(SPEventContext *ec); - -static gint sp_measure_context_root_handler(SPEventContext *event_context, GdkEvent *event); -static gint sp_measure_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event); - -static SPEventContextClass *parent_class; - -static gint xp = 0; // where drag started -static gint yp = 0; -static gint tolerance = 0; -static bool within_tolerance = false; - -Geom::Point start_point; - -std::vector<Inkscape::Display::TemporaryItem*> measure_tmp_items; - -GType sp_measure_context_get_type(void) -{ - static GType type = 0; - - if (!type) { - GTypeInfo info = { - sizeof(SPMeasureContextClass), - NULL, NULL, - reinterpret_cast<GClassInitFunc>(sp_measure_context_class_init), // TODO needs two params? - NULL, NULL, - sizeof(SPMeasureContext), - 4, - reinterpret_cast<GInstanceInitFunc>(sp_measure_context_init), // TODO needs two params? - NULL, // value_table - }; - type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPMeasureContext", &info, static_cast<GTypeFlags>(0)); - } - - return type; -} - -static void sp_measure_context_class_init(SPMeasureContextClass *klass) -{ - SPEventContextClass *event_context_class = reinterpret_cast<SPEventContextClass *>(klass); - - parent_class = static_cast<SPEventContextClass*>(g_type_class_peek_parent(klass)); - - event_context_class->setup = sp_measure_context_setup; - event_context_class->finish = sp_measure_context_finish; - - event_context_class->root_handler = sp_measure_context_root_handler; - event_context_class->item_handler = sp_measure_context_item_handler; -} - -static void sp_measure_context_init(SPMeasureContext *measure_context) -{ - SPEventContext *event_context = SP_EVENT_CONTEXT(measure_context); - - event_context->cursor_shape = cursor_measure_xpm; - event_context->hot_x = 4; - event_context->hot_y = 4; -} - -static void sp_measure_context_finish(SPEventContext *ec) -{ - SPMeasureContext *mc = SP_MEASURE_CONTEXT(ec); - - ec->enableGrDrag(false); - - if (mc->grabbed) { - sp_canvas_item_ungrab(mc->grabbed, GDK_CURRENT_TIME); - mc->grabbed = NULL; - } -} - -static void sp_measure_context_setup(SPEventContext *ec) -{ - if (parent_class->setup) { - parent_class->setup(ec); - } -} - -static gint sp_measure_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event) -{ - gint ret = FALSE; - - if (parent_class->item_handler) { - ret = parent_class->item_handler(event_context, item, event); - } - - return ret; -} - -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]; - } -} - -void calculate_intersections(SPDesktop * /*desktop*/, SPItem* item, Geom::PathVector *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 - } -} - -static gint sp_measure_context_root_handler(SPEventContext *event_context, GdkEvent *event) -{ - SPDesktop *desktop = event_context->desktop; - Inkscape::Preferences *prefs = Inkscape::Preferences::get(); - tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100); - - SPMeasureContext *mc = SP_MEASURE_CONTEXT(event_context); - gint ret = FALSE; - - switch (event->type) { - case GDK_BUTTON_PRESS: - { - Geom::Point const button_w(event->button.x, event->button.y); - start_point = desktop->w2d(button_w); - if (event->button.button == 1 && !event_context->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); - mc->grabbed = SP_CANVAS_ITEM(desktop->acetate); - break; - } - - case GDK_MOTION_NOTIFY: - { - if (!((event->motion.state & GDK_BUTTON1_MASK) && !event_context->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(event_context, 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(); - } - } - - - //draw control line - SPCtrlLine *control_line = SP_CTRLLINE(sp_canvas_item_new(sp_desktop_tempgroup(desktop), SP_TYPE_CTRLLINE, NULL)); - control_line->setCoords(start_point, end_point); - measure_tmp_items.push_back(desktop->add_temporary_canvasitem(control_line, 0)); - - 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); - -//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)); - } - - // 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()); - Geom::PathVector pathv = curve->get_pathvector(); - - 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); - } - - for (size_t idx = 0; idx < intersections.size(); ++idx) { - // Display the intersection indicator (i.e. the cross) - SPCanvasItem * canvasitem = NULL; - 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)); - } - - SPUnitId unitid = static_cast<SPUnitId>(prefs->getInt("/tools/measure/unitid", SP_UNIT_PX)); - SPUnit unit = sp_unit_get_by_id(unitid); - - double fontsize = prefs->getInt("/tools/measure/fontsize"); - - Geom::Point previous_point; - if (!intersections.empty()) { - previous_point = intersections[0]; - } - - for (size_t idx = 1; idx < intersections.size(); ++idx) { - Geom::Point measure_text_pos = (previous_point + intersections[idx]) / 2; -//TODO: shift label a few pixels in the y coordinate - - double lengthval = (intersections[idx] - previous_point).length(); - sp_convert_distance(&lengthval, &sp_unit_get_by_id(SP_UNIT_PX), &unit); - - // TODO cleanup memory, Glib::ustring, etc.: - char* measure_str = static_cast<char*>(malloc(20)); - sprintf(measure_str, "%.2f %s", lengthval, unit.abbr); - SPCanvasItem *canvas_tooltip = sp_canvastext_new(sp_desktop_tempgroup(desktop), desktop, desktop->doc2dt(measure_text_pos), measure_str); - - sp_canvastext_set_fontsize(SP_CANVASTEXT(canvas_tooltip), fontsize); - SP_CANVASTEXT(canvas_tooltip)->rgba = 0xffffffff; - SP_CANVASTEXT(canvas_tooltip)->rgba_background = 0x0000007f; - SP_CANVASTEXT(canvas_tooltip)->outline = false; - SP_CANVASTEXT(canvas_tooltip)->background = true; - SP_CANVASTEXT(canvas_tooltip)->anchor_position = TEXT_ANCHOR_CENTER; - - measure_tmp_items.push_back(desktop->add_temporary_canvasitem(canvas_tooltip, 0)); - free(measure_str); - previous_point = intersections[idx]; - } - - { - // TODO cleanup memory, Glib::ustring, etc.: - char* angle_str = static_cast<char*>(malloc(20)); - sprintf(angle_str, "%.2f °", angle * 180/M_PI); - SPCanvasItem *canvas_tooltip = sp_canvastext_new(sp_desktop_tempgroup(desktop), desktop, end_point + desktop->w2d(Geom::Point(3*fontsize, fontsize)), angle_str); - sp_canvastext_set_fontsize(SP_CANVASTEXT(canvas_tooltip), fontsize); - SP_CANVASTEXT(canvas_tooltip)->rgba = 0xffffffff; - SP_CANVASTEXT(canvas_tooltip)->rgba_background = 0x337f337f; - SP_CANVASTEXT(canvas_tooltip)->outline = false; - SP_CANVASTEXT(canvas_tooltip)->background = true; - SP_CANVASTEXT(canvas_tooltip)->anchor_position = TEXT_ANCHOR_LEFT; - - measure_tmp_items.push_back(desktop->add_temporary_canvasitem(canvas_tooltip, 0)); - free(angle_str); - } - { - double totallengthval = (end_point - start_point).length(); - sp_convert_distance(&totallengthval, &sp_unit_get_by_id(SP_UNIT_PX), &unit); - - char* totallength_str = static_cast<char*>(malloc(20)); - sprintf(totallength_str, "%.2f %s", totallengthval, unit.abbr); - SPCanvasItem *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(SP_CANVASTEXT(canvas_tooltip), fontsize); - SP_CANVASTEXT(canvas_tooltip)->rgba = 0xffffffff; - SP_CANVASTEXT(canvas_tooltip)->rgba_background = 0x3333337f; - SP_CANVASTEXT(canvas_tooltip)->outline = false; - SP_CANVASTEXT(canvas_tooltip)->background = true; - SP_CANVASTEXT(canvas_tooltip)->anchor_position = TEXT_ANCHOR_LEFT; - - measure_tmp_items.push_back(desktop->add_temporary_canvasitem(canvas_tooltip, 0)); - free(totallength_str); - } - - Geom::Point normal = desktop->w2d(Geom::unit_vector(Geom::rot90(desktop->d2w(end_point - start_point)))); - if (intersections.size() > 2) { - control_line = SP_CTRLLINE(sp_canvas_item_new(sp_desktop_tempgroup (desktop), SP_TYPE_CTRLLINE, NULL)); - control_line->setCoords(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 = SP_CTRLLINE(sp_canvas_item_new(sp_desktop_tempgroup (desktop), SP_TYPE_CTRLLINE, NULL)); - control_line->setCoords(desktop->doc2dt(intersections[0]), desktop->doc2dt(intersections[0]) + normal*65); - measure_tmp_items.push_back(desktop->add_temporary_canvasitem(control_line, 0)); - - control_line = SP_CTRLLINE(sp_canvas_item_new(sp_desktop_tempgroup (desktop), SP_TYPE_CTRLLINE, NULL)); - control_line->setCoords(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)); - - double totallengthval = (intersections[intersections.size()-1] - intersections[0]).length(); - sp_convert_distance(&totallengthval, &sp_unit_get_by_id(SP_UNIT_PX), &unit); - - // TODO cleanup memory, Glib::ustring, etc.: - char* total_str = static_cast<char*>(malloc(20)); - sprintf(total_str, "%.2f %s", totallengthval, unit.abbr); - - SPCanvasItem *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(SP_CANVASTEXT(canvas_tooltip), fontsize); - SP_CANVASTEXT(canvas_tooltip)->rgba = 0xffffffff; - SP_CANVASTEXT(canvas_tooltip)->rgba_background = 0x33337f7f; - SP_CANVASTEXT(canvas_tooltip)->outline = false; - SP_CANVASTEXT(canvas_tooltip)->background = true; - SP_CANVASTEXT(canvas_tooltip)->anchor_position = TEXT_ANCHOR_CENTER; - - measure_tmp_items.push_back(desktop->add_temporary_canvasitem(canvas_tooltip, 0)); - free(total_str); - } - - gobble_motion_events(GDK_BUTTON1_MASK); - } - break; - } - - case GDK_BUTTON_RELEASE: - { - sp_event_context_discard_delayed_snap_event(event_context); - - //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 (mc->grabbed) { - sp_canvas_item_ungrab(mc->grabbed, event->button.time); - mc->grabbed = NULL; - } - xp = 0; - yp = 0; - break; - } - default: - break; - } - - if (!ret) { - if (parent_class->root_handler) { - ret = parent_class->root_handler(event_context, 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 : |