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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 "display/sodipodi-ctrlrect.h"
#include "desktop.h"
#include "rubberband.h"
#include "display/sp-canvas.h"
#include "display/canvas-bpath.h"
#include "display/curve.h"
Inkscape::Rubberband *Inkscape::Rubberband::_instance = nullptr;
Inkscape::Rubberband::Rubberband(SPDesktop *dt)
: _desktop(dt), _rect(nullptr), _touchpath(nullptr), _started(false)
{
_points.clear();
_mode = RUBBERBAND_MODE_RECT;
_touchpath_curve = new SPCurve();
}
void Inkscape::Rubberband::delete_canvas_items()
{
if (_rect) {
SPCanvasItem *temp = _rect;
_rect = nullptr;
sp_canvas_item_destroy(temp);
}
if (_touchpath) {
SPCanvasItem *temp = _touchpath;
_touchpath = nullptr;
sp_canvas_item_destroy(temp);
}
}
void Inkscape::Rubberband::start(SPDesktop *d, Geom::Point const &p)
{
_points.clear();
_touchpath_curve->reset();
delete_canvas_items();
_desktop = d;
_start = p;
_started = true;
_points.push_back(_desktop->d2w(p));
_touchpath_curve->moveto(p);
_desktop->canvas->forceFullRedrawAfterInterruptions(5);
}
void Inkscape::Rubberband::stop()
{
_started = false;
_mode = RUBBERBAND_MODE_RECT; // restore the default
_points.clear();
_touchpath_curve->reset();
delete_canvas_items();
if (_desktop) {
_desktop->canvas->endForcedFullRedraws();
}
}
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 (_mode == RUBBERBAND_MODE_RECT) {
if (_rect == nullptr) {
_rect = static_cast<CtrlRect *>(sp_canvas_item_new(_desktop->getControls(), SP_TYPE_CTRLRECT, nullptr));
_rect->setColor(0x808080ff, false, 0x0);
_rect->setInvert(true);
}
_rect->setRectangle(Geom::Rect(_start, _end));
sp_canvas_item_show(_rect);
if (_touchpath)
sp_canvas_item_hide(_touchpath);
} else if (_mode == RUBBERBAND_MODE_TOUCHPATH) {
if (_touchpath == nullptr) {
_touchpath = sp_canvas_bpath_new(_desktop->getSketch(), nullptr);
sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(_touchpath), 0xff0000ff, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(_touchpath), 0, SP_WIND_RULE_NONZERO);
}
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(_touchpath), _touchpath_curve);
sp_canvas_item_show(_touchpath);
if (_rect)
sp_canvas_item_hide(_rect);
}
}
void Inkscape::Rubberband::setMode(int mode)
{
_mode = mode;
}
/**
* @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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