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Diffstat (limited to 'src/display/canvas-grid.h')
| -rw-r--r-- | src/display/canvas-grid.h | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/src/display/canvas-grid.h b/src/display/canvas-grid.h new file mode 100644 index 0000000..73fe587 --- /dev/null +++ b/src/display/canvas-grid.h @@ -0,0 +1,216 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** @file + * Cartesian grid item for the Inkscape canvas. + *//* + * Authors: see git history + * + * Copyright (C) 2018 Authors + * Copyright (C) Johan Engelen 2006-2007 <johan@shouraizou.nl> + * Copyright (C) Lauris Kaplinski 2000 + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#ifndef INKSCAPE_CANVAS_GRID_H +#define INKSCAPE_CANVAS_GRID_H + +#include "sp-canvas-item.h" +#include "ui/widget/alignment-selector.h" +#include "ui/widget/registered-widget.h" +#include "ui/widget/registry.h" +#include "line-snapper.h" + +class SPDesktop; +class SPNamedView; +struct SPCanvasBuf; +class SPDocument; + +namespace Gtk { + class Widget; +} + +namespace Inkscape { +class Snapper; + +namespace XML { +class Node; +} + +namespace Util { +class Unit; +} + +enum GridType { + GRID_RECTANGULAR = 0, + GRID_AXONOMETRIC = 1 +}; +#define GRID_MAXTYPENR 1 + +#define INKSCAPE_TYPE_GRID_CANVASITEM (Inkscape::grid_canvasitem_get_type ()) +#define INKSCAPE_GRID_CANVASITEM(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), INKSCAPE_TYPE_GRID_CANVASITEM, GridCanvasItem)) +#define INKSCAPE_GRID_CANVASITEM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), INKSCAPE_TYPE_GRID_CANVASITEM, GridCanvasItem)) +#define INKSCAPE_IS_GRID_CANVASITEM(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), INKSCAPE_TYPE_GRID_CANVASITEM)) +#define INKSCAPE_IS_GRID_CANVASITEM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), INKSCAPE_TYPE_GRID_CANVASITEM)) + +#define GRID_DEFAULT_COLOR 0x3F3FFF20 +#define GRID_DEFAULT_EMPCOLOR 0x3F3FFF40 + +class CanvasGrid; + +/** All the variables that are tracked for a grid specific canvas item. */ +struct GridCanvasItem : public SPCanvasItem{ + CanvasGrid *grid; // the owning grid object +}; + +struct GridCanvasItemClass { + SPCanvasItemClass parent_class; +}; + +/* Standard Gtk function */ +GType grid_canvasitem_get_type (); + + + +class CanvasGrid { +public: + virtual ~CanvasGrid(); + + // TODO: see effect.h and effect.cpp from live_effects how to link enums to SVGname to typename properly. (johan) + const char * getName() const; + const char * getSVGName() const; + GridType getGridType() const; + static const char * getName(GridType type); + static const char * getSVGName(GridType type); + static GridType getGridTypeFromSVGName(const char * typestr); + static GridType getGridTypeFromName(const char * typestr); + + static CanvasGrid* NewGrid(SPNamedView * nv, Inkscape::XML::Node * repr, SPDocument *doc, GridType gridtype); + static void writeNewGridToRepr(Inkscape::XML::Node * repr, SPDocument * doc, GridType gridtype); + + GridCanvasItem * createCanvasItem(SPDesktop * desktop); + + virtual void Update (Geom::Affine const &affine, unsigned int flags) = 0; + virtual void Render (SPCanvasBuf *buf) = 0; + + virtual void readRepr() = 0; + virtual void onReprAttrChanged (Inkscape::XML::Node * /*repr*/, char const */*key*/, char const */*oldval*/, char const */*newval*/, bool /*is_interactive*/) = 0; + + Gtk::Widget * newWidget(); + + void setOrigin(Geom::Point const &origin_px); /**< writes new origin (specified in px units) to SVG */ + Geom::Point origin; /**< Origin of the grid */ + + guint32 color; /**< Color for normal lines */ + guint32 empcolor; /**< Color for emphasis lines */ + gint empspacing; /**< Spacing between emphasis lines */ + + Inkscape::Util::Unit const* gridunit; /**< points to Unit object in UnitTable (so don't delete it) */ + + Inkscape::XML::Node * repr; + SPDocument *doc; + + Inkscape::Snapper* snapper; + + static void on_repr_attr_changed (Inkscape::XML::Node * repr, const gchar *key, const gchar *oldval, const gchar *newval, bool is_interactive, void * data); + + bool isLegacy() const { return legacy; } + bool isPixel() const { return pixel; } + + bool isVisible() const { return (isEnabled() &&visible); }; + bool isEnabled() const; + + void align_clicked(int align); + +protected: + CanvasGrid(SPNamedView * nv, Inkscape::XML::Node * in_repr, SPDocument *in_doc, GridType type); + + virtual Gtk::Widget * newSpecificWidget() = 0; + + std::vector<SPCanvasItem*> canvasitems; // list of created canvasitems + + SPNamedView * namedview; + + Inkscape::UI::Widget::Registry _wr; + bool visible; + bool render_dotted; + + GridType gridtype; + + // For dealing with old Inkscape SVG files (pre 0.92) + bool legacy; + bool pixel; + + Inkscape::UI::Widget::RegisteredCheckButton *_rcb_enabled = nullptr; + Inkscape::UI::Widget::RegisteredCheckButton *_rcb_snap_visible_only = nullptr; + Inkscape::UI::Widget::RegisteredCheckButton *_rcb_visible = nullptr; + Inkscape::UI::Widget::RegisteredCheckButton *_rcb_dotted = nullptr; + Inkscape::UI::Widget::AlignmentSelector *_as_alignment = nullptr; + +private: + CanvasGrid(const CanvasGrid&) = delete; + CanvasGrid& operator=(const CanvasGrid&) = delete; +}; + + +class CanvasXYGrid : public CanvasGrid { +public: + CanvasXYGrid(SPNamedView * nv, Inkscape::XML::Node * in_repr, SPDocument * in_doc); + ~CanvasXYGrid() override; + + virtual void Scale (Geom::Scale const &scale); + void Update (Geom::Affine const &affine, unsigned int flags) override; + void Render (SPCanvasBuf *buf) override; + + void readRepr() override; + void onReprAttrChanged (Inkscape::XML::Node * repr, char const *key, char const *oldval, char const *newval, bool is_interactive) override; + + Geom::Point spacing; /**< Spacing between elements of the grid */ + bool scaled[2]; /**< Whether the grid is in scaled mode, which can + be different in the X or Y direction, hence two + variables */ + Geom::Point ow; /**< Transformed origin by the affine for the zoom */ + Geom::Point sw[2]; /**< Transformed spacing by the affine for the zoom */ + +protected: + Gtk::Widget * newSpecificWidget() override; + +private: + CanvasXYGrid(const CanvasXYGrid&) = delete; + CanvasXYGrid& operator=(const CanvasXYGrid&) = delete; + + void updateWidgets(); + + Inkscape::UI::Widget::RegisteredUnitMenu *_rumg = nullptr; + Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_ox = nullptr; + Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_oy = nullptr; + Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_sx = nullptr; + Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_sy = nullptr; + Inkscape::UI::Widget::RegisteredColorPicker *_rcp_gcol = nullptr; + Inkscape::UI::Widget::RegisteredColorPicker *_rcp_gmcol = nullptr; + Inkscape::UI::Widget::RegisteredSuffixedInteger *_rsi = nullptr; +}; + + + +class CanvasXYGridSnapper : public LineSnapper +{ +public: + CanvasXYGridSnapper(CanvasXYGrid *grid, SnapManager *sm, Geom::Coord const d); + bool ThisSnapperMightSnap() const override; + + Geom::Coord getSnapperTolerance() const override; //returns the tolerance of the snapper in screen pixels (i.e. independent of zoom) + bool getSnapperAlwaysSnap() const override; //if true, then the snapper will always snap, regardless of its tolerance + +private: + LineList _getSnapLines(Geom::Point const &p) const override; + void _addSnappedLine(IntermSnapResults &isr, Geom::Point const &snapped_point, Geom::Coord const &snapped_distance, SnapSourceType const &source, long source_num, Geom::Point const &normal_to_line, const Geom::Point &point_on_line) const override; + void _addSnappedPoint(IntermSnapResults &isr, Geom::Point const &snapped_point, Geom::Coord const &snapped_distance, SnapSourceType const &source, long source_num, bool constrained_snap) const override; + void _addSnappedLinePerpendicularly(IntermSnapResults &isr, Geom::Point const &snapped_point, Geom::Coord const &snapped_distance, SnapSourceType const &source, long source_num, bool constrained_snap) const override; + CanvasXYGrid *grid; +}; + +}; /* namespace Inkscape */ + + + + +#endif |