diff options
Diffstat (limited to 'src/ui/tool/path-manipulator.h')
| -rw-r--r-- | src/ui/tool/path-manipulator.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/src/ui/tool/path-manipulator.h b/src/ui/tool/path-manipulator.h new file mode 100644 index 0000000..ca861c6 --- /dev/null +++ b/src/ui/tool/path-manipulator.h @@ -0,0 +1,186 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** @file + * Path manipulator - a component that edits a single path on-canvas + */ +/* 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_PATH_MANIPULATOR_H +#define SEEN_UI_TOOL_PATH_MANIPULATOR_H + +#include <string> +#include <memory> +#include <2geom/pathvector.h> +#include <2geom/path-sink.h> +#include <2geom/affine.h> +#include "ui/tool/node.h" +#include "ui/tool/manipulator.h" +#include "live_effects/lpe-bspline.h" + +struct SPCanvasItem; +class SPCurve; +class SPPath; + +namespace Inkscape { + +class CanvasItemBpath; + +namespace XML { class Node; } + +namespace UI { + +class PathManipulator; +class ControlPointSelection; +class PathManipulatorObserver; +class CurveDragPoint; +class PathCanvasGroups; +class MultiPathManipulator; +class Node; +class Handle; + +struct PathSharedData { + NodeSharedData node_data; + Inkscape::CanvasItemGroup *outline_group; + Inkscape::CanvasItemGroup *dragpoint_group; +}; + +/** + * Manipulator that edits a single path using nodes with handles. + * Currently only cubic bezier and linear segments are supported, but this might change + * some time in the future. + */ +class PathManipulator : public PointManipulator { +public: + typedef SPPath *ItemType; + + PathManipulator(MultiPathManipulator &mpm, SPObject *path, Geom::Affine const &edit_trans, + guint32 outline_color, Glib::ustring lpe_key); + ~PathManipulator() override; + bool event(Inkscape::UI::Tools::ToolBase *, GdkEvent *) override; + + bool empty(); + void writeXML(); + void update(bool alert_LPE = false); // update display, but don't commit + void clear(); // remove all nodes from manipulator + SPObject *item() { return _path; } + + void selectSubpaths(); + void invertSelectionInSubpaths(); + + void insertNodeAtExtremum(ExtremumType extremum); + void insertNodes(); + void insertNode(Geom::Point); + void insertNode(NodeList::iterator first, double t, bool take_selection); + void duplicateNodes(); + void copySelectedPath(Geom::PathBuilder *builder); + void weldNodes(NodeList::iterator preserve_pos = NodeList::iterator()); + void weldSegments(); + void breakNodes(); + void deleteNodes(bool keep_shape = true); + void deleteSegments(); + void reverseSubpaths(bool selected_only); + void setSegmentType(SegmentType); + + void scaleHandle(Node *n, int which, int dir, bool pixel); + void rotateHandle(Node *n, int which, int dir, bool pixel); + + void showOutline(bool show); + void showHandles(bool show); + void showPathDirection(bool show); + void setLiveOutline(bool set); + void setLiveObjects(bool set); + void updateHandles(); + void updatePath(); + void setControlsTransform(Geom::Affine const &); + void hideDragPoint(); + MultiPathManipulator &mpm() { return _multi_path_manipulator; } + + NodeList::iterator subdivideSegment(NodeList::iterator after, double t); + NodeList::iterator extremeNode(NodeList::iterator origin, bool search_selected, + bool search_unselected, bool closest); + + int _bsplineGetSteps() const; + // this is necessary for Tab-selection in MultiPathManipulator + SubpathList &subpathList() { return _subpaths; } + + static bool is_item_type(void *item); +private: + typedef NodeList Subpath; + typedef std::shared_ptr<NodeList> SubpathPtr; + + void _createControlPointsFromGeometry(); + + void _recalculateIsBSpline(); + bool _isBSpline() const; + double _bsplineHandlePosition(Handle *h, bool check_other = true); + Geom::Point _bsplineHandleReposition(Handle *h, bool check_other = true); + Geom::Point _bsplineHandleReposition(Handle *h, double pos); + void _createGeometryFromControlPoints(bool alert_LPE = false); + unsigned _deleteStretch(NodeList::iterator first, NodeList::iterator last, bool keep_shape); + std::string _createTypeString(); + void _updateOutline(); + //void _setOutline(Geom::PathVector const &); + void _getGeometry(); + void _setGeometry(); + Glib::ustring _nodetypesKey(); + Inkscape::XML::Node *_getXMLNode(); + + void _selectionChangedM(std::vector<SelectableControlPoint *> pvec, bool selected); + void _selectionChanged(SelectableControlPoint * p, bool selected); + bool _nodeClicked(Node *, GdkEventButton *); + void _handleGrabbed(); + bool _handleClicked(Handle *, GdkEventButton *); + void _handleUngrabbed(); + + void _externalChange(unsigned type); + void _removeNodesFromSelection(); + void _commit(Glib::ustring const &annotation); + void _commit(Glib::ustring const &annotation, gchar const *key); + Geom::Coord _updateDragPoint(Geom::Point const &); + void _updateOutlineOnZoomChange(); + double _getStrokeTolerance(); + Handle *_chooseHandle(Node *n, int which); + + SubpathList _subpaths; + MultiPathManipulator &_multi_path_manipulator; + SPObject *_path; ///< can be an SPPath or an Inkscape::LivePathEffect::Effect !!! + std::unique_ptr<SPCurve> _spcurve; // in item coordinates + Inkscape::CanvasItemBpath *_outline = nullptr; + CurveDragPoint *_dragpoint; // an invisible control point hovering over curve + PathManipulatorObserver *_observer; + Geom::Affine _d2i_transform; ///< desktop-to-item transform + Geom::Affine _i2d_transform; ///< item-to-desktop transform, inverse of _d2i_transform + Geom::Affine _edit_transform; ///< additional transform to apply to editing controls + bool _show_handles = true; + bool _show_outline = false; + bool _show_path_direction = false; + bool _live_outline = true; + bool _live_objects = true; + bool _is_bspline = false; + Glib::ustring _lpe_key; + + friend class PathManipulatorObserver; + friend class CurveDragPoint; + friend class Node; + friend class Handle; +}; + +} // 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:textwidth=99 : |