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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Rubberbanding selector.
*
* Author:
* Lauris Kaplinski <lauris@kaplinski.com>
* Jon A. Cruz <jon@joncruz.org>
*
* Copyright (C) 1999-2002 Lauris Kaplinski
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "desktop.h"
#include "rubberband.h"
#include "2geom/path.h"
#include "display/curve.h"
#include "display/control/canvas-item-bpath.h"
#include "display/control/canvas-item-rect.h"
#include "ui/widget/canvas.h" // autoscroll
Inkscape::Rubberband *Inkscape::Rubberband::_instance = nullptr;
Inkscape::Rubberband::Rubberband(SPDesktop *dt)
: _desktop(dt)
{
_touchpath_curve = new SPCurve();
}
void Inkscape::Rubberband::delete_canvas_items()
{
_rect.reset();
_touchpath.reset();
}
Geom::Path Inkscape::Rubberband::getPath() const
{
g_assert(_started);
if (_mode == RUBBERBAND_MODE_TOUCHPATH) {
return _path * _desktop->w2d();
}
return Geom::Path(*getRectangle());
}
std::vector<Geom::Point> Inkscape::Rubberband::getPoints() const
{
return _path.nodes();
}
void Inkscape::Rubberband::start(SPDesktop *d, Geom::Point const &p, bool tolerance)
{
_desktop = d;
_start = p;
_started = true;
_moved = false;
auto prefs = Inkscape::Preferences::get();
_tolerance = tolerance ? prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100) : 0.0;
_touchpath_curve->reset();
_touchpath_curve->moveto(p);
_path = Geom::Path(_desktop->d2w(p));
delete_canvas_items();
}
void Inkscape::Rubberband::stop()
{
_started = false;
_moved = false;
defaultMode(); // restore the default
_touchpath_curve->reset();
_path.clear();
delete_canvas_items();
resetColor();
}
void Inkscape::Rubberband::move(Geom::Point const &p)
{
if (!_started)
return;
if (!_moved) {
if (Geom::are_near(_start, p, _tolerance/_desktop->current_zoom()))
return;
}
_end = p;
_moved = true;
_desktop->getCanvas()->enable_autoscroll();
_touchpath_curve->lineto(p);
Geom::Point next = _desktop->d2w(p);
// we want the points to be at most 0.5 screen pixels apart,
// so that we don't lose anything small;
// if they are farther apart, we interpolate more points
auto prev = _path.finalPoint();
if (Geom::L2(next-prev) > 0.5) {
int subdiv = 2 * (int) round(Geom::L2(next-prev) + 0.5);
for (int i = 1; i <= subdiv; i ++) {
_path.appendNew<Geom::LineSegment>(prev + ((double)i/subdiv) * (next - prev));
}
} else {
_path.appendNew<Geom::LineSegment>(next);
}
if (_touchpath) _touchpath->hide();
if (_rect) _rect->hide();
switch (_mode) {
case RUBBERBAND_MODE_RECT:
if (!_rect) {
_rect = make_canvasitem<CanvasItemRect>(_desktop->getCanvasControls());
_rect->set_stroke(_color.value_or(0x808080ff));
_rect->set_shadow(0xffffffff, 0); // Not a shadow
_rect->set_dashed(false);
_rect->set_inverted(true);
}
_rect->set_rect(Geom::Rect(_start, _end));
_rect->show();
break;
case RUBBERBAND_MODE_TOUCHRECT:
if (!_rect) {
_rect = make_canvasitem<CanvasItemRect>(_desktop->getCanvasControls());
_rect->set_stroke(_color.value_or(0xff0000ff));
_rect->set_shadow(0xffffffff, 0); // Not a shadow
_rect->set_dashed(false);
_rect->set_inverted(false);
}
_rect->set_rect(Geom::Rect(_start, _end));
_rect->show();
break;
case RUBBERBAND_MODE_TOUCHPATH:
if (!_touchpath) {
_touchpath = make_canvasitem<CanvasItemBpath>(_desktop->getCanvasControls()); // Should be sketch?
_touchpath->set_stroke(_color.value_or(0xff0000ff));
_touchpath->set_fill(0x0, SP_WIND_RULE_NONZERO);
}
_touchpath->set_bpath(_touchpath_curve);
_touchpath->show();
break;
default:
break;
}
}
void Inkscape::Rubberband::setColor(uint32_t color)
{
_color = color;
if (_mode == RUBBERBAND_MODE_TOUCHPATH) {
if (_touchpath) {
_touchpath->set_stroke(color);
}
} else {
if (_rect) {
_rect->set_stroke(color);
}
}
}
void Inkscape::Rubberband::setMode(int mode)
{
_mode = mode;
}
/**
* Set the default mode (usually rect or touchrect)
*/
void Inkscape::Rubberband::defaultMode()
{
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
if (prefs->getBool("/tools/select/touch_box", false)) {
_mode = RUBBERBAND_MODE_TOUCHRECT;
} else {
_mode = RUBBERBAND_MODE_RECT;
}
}
/**
* @return Rectangle in desktop coordinates
*/
Geom::OptRect Inkscape::Rubberband::getRectangle() const
{
if (!_started) {
return Geom::OptRect();
}
return Geom::Rect(_start, _end);
}
Inkscape::Rubberband *Inkscape::Rubberband::get(SPDesktop *desktop)
{
if (!_instance) {
_instance = new Inkscape::Rubberband(desktop);
}
return _instance;
}
/*
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 :
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