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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 "display/curve.h"
#include "display/control/canvas-item-bpath.h"
#include "display/control/canvas-item-rect.h"
#include "ui/widget/canvas.h" // Forced redraws
Inkscape::Rubberband *Inkscape::Rubberband::_instance = nullptr;
Inkscape::Rubberband::Rubberband(SPDesktop *dt)
: _desktop(dt)
{
_touchpath_curve = new SPCurve();
}
void Inkscape::Rubberband::delete_canvas_items()
{
if (_rect) {
delete _rect;
_rect = nullptr;
}
if (_touchpath) {
delete _touchpath;
_touchpath = nullptr;
}
}
void Inkscape::Rubberband::start(SPDesktop *d, Geom::Point const &p)
{
_desktop = d;
_start = p;
_started = true;
_touchpath_curve->reset();
_touchpath_curve->moveto(p);
_points.clear();
_points.push_back(_desktop->d2w(p));
delete_canvas_items();
}
void Inkscape::Rubberband::stop()
{
_started = false;
defaultMode(); // restore the default
_points.clear();
_touchpath_curve->reset();
delete_canvas_items();
}
void Inkscape::Rubberband::move(Geom::Point const &p)
{
if (!_started)
return;
_end = p;
_desktop->scroll_to_point(p);
_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
if (!_points.empty() && Geom::L2(next-_points.back()) > 0.5) {
Geom::Point prev = _points.back();
int subdiv = 2 * (int) round(Geom::L2(next-prev) + 0.5);
for (int i = 1; i <= subdiv; i ++) {
_points.push_back(prev + ((double)i/subdiv) * (next - prev));
}
} else {
_points.push_back(next);
}
if (_touchpath) _touchpath->hide();
if (_rect) _rect->hide();
switch (_mode) {
case RUBBERBAND_MODE_RECT:
if (_rect == nullptr) {
_rect = new Inkscape::CanvasItemRect(_desktop->getCanvasControls());
_rect->set_stroke(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 == nullptr) {
_rect = new Inkscape::CanvasItemRect(_desktop->getCanvasControls());
_rect->set_stroke(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 == nullptr) {
_touchpath = new Inkscape::CanvasItemBpath(_desktop->getCanvasControls()); // Should be sketch?
_touchpath->set_stroke(0xff0000ff);
_touchpath->set_fill(0x0, SP_WIND_RULE_NONZERO);
}
_touchpath->set_bpath(_touchpath_curve);
_touchpath->show();
break;
default:
break;
}
}
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 == nullptr) {
_instance = new Inkscape::Rubberband(desktop);
}
return _instance;
}
bool Inkscape::Rubberband::is_started()
{
return _started;
}
/*
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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