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// SPDX-License-Identifier: GPL-2.0-or-later
/** @file
* Control point selection - stores a set of control points and applies transformations
* to them
*/
/* Authors:
* Krzysztof Kosiński <tweenk.pl@gmail.com>
*
* Copyright (C) 2009 Authors
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#ifndef SEEN_UI_TOOL_CONTROL_POINT_SELECTION_H
#define SEEN_UI_TOOL_CONTROL_POINT_SELECTION_H
#include <list>
#include <memory>
#include <unordered_map>
#include <unordered_set>
#include <optional>
#include <cstddef>
#include <sigc++/sigc++.h>
#include <2geom/forward.h>
#include <2geom/point.h>
#include <2geom/rect.h>
#include "ui/tool/commit-events.h"
#include "ui/tool/manipulator.h"
#include "ui/tool/node-types.h"
#include "snap-candidate.h"
class SPDesktop;
namespace Inkscape {
class CanvasItemGroup;
namespace UI {
class TransformHandleSet;
class SelectableControlPoint;
}
}
namespace Inkscape {
namespace UI {
class ControlPointSelection : public Manipulator, public sigc::trackable {
public:
ControlPointSelection(SPDesktop *d, Inkscape::CanvasItemGroup *th_group);
~ControlPointSelection() override;
typedef std::unordered_set<SelectableControlPoint *> set_type;
typedef set_type Set; // convenience alias
typedef set_type::iterator iterator;
typedef set_type::const_iterator const_iterator;
typedef set_type::size_type size_type;
typedef SelectableControlPoint *value_type;
typedef SelectableControlPoint *key_type;
// size
bool empty() { return _points.empty(); }
size_type size() { return _points.size(); }
// iterators
iterator begin() { return _points.begin(); }
const_iterator begin() const { return _points.begin(); }
iterator end() { return _points.end(); }
const_iterator end() const { return _points.end(); }
// insert
std::pair<iterator, bool> insert(const value_type& x, bool notify = true, bool to_update = true);
template <class InputIterator>
void insert(InputIterator first, InputIterator last) {
for (; first != last; ++first) {
insert(*first, false, false);
}
_update();
signal_selection_changed.emit(std::vector<key_type>(first, last), true);
}
// erase
void clear();
void erase(iterator pos, bool to_update = true);
size_type erase(const key_type& k, bool notify = true);
void erase(iterator first, iterator last);
// find
iterator find(const key_type &k) {
return _points.find(k);
}
// Sometimes it is very useful to keep a list of all selectable points.
set_type const &allPoints() const { return _all_points; }
set_type &allPoints() { return _all_points; }
// ...for example in these methods. Another useful case is snapping.
void selectAll();
void selectArea(Geom::Rect const &, bool invert = false);
void invertSelection();
void spatialGrow(SelectableControlPoint *origin, int dir);
bool event(Inkscape::UI::Tools::ToolBase *, GdkEvent *) override;
void transform(Geom::Affine const &m);
void align(Geom::Dim2 d, AlignTargetNode target = AlignTargetNode::MID_NODE);
void distribute(Geom::Dim2 d);
Geom::OptRect pointwiseBounds();
Geom::OptRect bounds();
bool transformHandlesEnabled() { return _handles_visible; }
void showTransformHandles(bool v, bool one_node);
// the two methods below do not modify the state; they are for use in manipulators
// that need to temporarily hide the handles, for example when moving a node
void hideTransformHandles();
void restoreTransformHandles();
void toggleTransformHandlesMode();
sigc::signal<void> signal_update;
// It turns out that emitting a signal after every point is selected or deselected is not too efficient,
// so this can be done in a massive group once the selection is finally changed.
sigc::signal<void, std::vector<SelectableControlPoint *>, bool> signal_selection_changed;
sigc::signal<void, CommitEvent> signal_commit;
void getOriginalPoints(std::vector<Inkscape::SnapCandidatePoint> &pts);
void getUnselectedPoints(std::vector<Inkscape::SnapCandidatePoint> &pts);
void setOriginalPoints();
//the purpose of this list is to keep track of first and last selected
std::list<SelectableControlPoint *> _points_list;
private:
// The functions below are invoked from SelectableControlPoint.
// Previously they were connected to handlers when selecting, but this
// creates problems when dragging a point that was not selected.
void _pointGrabbed(SelectableControlPoint *);
void _pointDragged(Geom::Point &, GdkEventMotion *);
void _pointUngrabbed();
bool _pointClicked(SelectableControlPoint *, GdkEventButton *);
void _mouseoverChanged();
void _update();
void _updateTransformHandles(bool preserve_center);
void _updateBounds();
bool _keyboardMove(GdkEventKey const &, Geom::Point const &);
bool _keyboardRotate(GdkEventKey const &, int);
bool _keyboardScale(GdkEventKey const &, int);
bool _keyboardFlip(Geom::Dim2);
void _keyboardTransform(Geom::Affine const &);
void _commitHandlesTransform(CommitEvent ce);
double _rotationRadius(Geom::Point const &);
set_type _points;
set_type _all_points;
std::unordered_map<SelectableControlPoint *, Geom::Point> _original_positions;
std::unordered_map<SelectableControlPoint *, Geom::Affine> _last_trans;
std::optional<double> _rot_radius;
std::optional<double> _mouseover_rot_radius;
Geom::OptRect _bounds;
TransformHandleSet *_handles;
SelectableControlPoint *_grabbed_point, *_farthest_point;
unsigned _dragging : 1;
unsigned _handles_visible : 1;
unsigned _one_node_handles : 1;
friend class SelectableControlPoint;
};
} // namespace UI
} // namespace Inkscape
#endif
/*
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 :
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