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-rw-r--r--src/rubberband.cpp188
1 files changed, 188 insertions, 0 deletions
diff --git a/src/rubberband.cpp b/src/rubberband.cpp
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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 :