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#ifndef SP_ERASER_CONTEXT_H_SEEN
#define SP_ERASER_CONTEXT_H_SEEN
/*
* Handwriting-like drawing mode
*
* Authors:
* Mitsuru Oka <oka326@parkcity.ne.jp>
* Lauris Kaplinski <lauris@kaplinski.com>
*
* The original dynadraw code:
* Paul Haeberli <paul@sgi.com>
*
* Copyright (C) 1998 The Free Software Foundation
* Copyright (C) 1999-2002 authors
* Copyright (C) 2001-2002 Ximian, Inc.
* Copyright (C) 2008 Jon A. Cruz
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "display/curve.h"
#include "event-context.h"
#include <display/display-forward.h>
#include <libnr/nr-point.h>
#define SP_TYPE_ERASER_CONTEXT (sp_eraser_context_get_type())
#define SP_ERASER_CONTEXT(o) (GTK_CHECK_CAST((o), SP_TYPE_ERASER_CONTEXT, SPEraserContext))
#define SP_ERASER_CONTEXT_CLASS(k) (GTK_CHECK_CLASS_CAST((k), SP_TYPE_ERASER_CONTEXT, SPEraserContextClass))
#define SP_IS_ERASER_CONTEXT(o) (GTK_CHECK_TYPE((o), SP_TYPE_ERASER_CONTEXT))
#define SP_IS_ERASER_CONTEXT_CLASS(k) (GTK_CHECK_CLASS_TYPE((k), SP_TYPE_ERASER_CONTEXT))
class SPEraserContext;
class SPEraserContextClass;
#define SAMPLING_SIZE 8 /* fixme: ?? */
#define ERC_MIN_PRESSURE 0.0
#define ERC_MAX_PRESSURE 1.0
#define ERC_DEFAULT_PRESSURE 1.0
#define ERC_MIN_TILT -1.0
#define ERC_MAX_TILT 1.0
#define ERC_DEFAULT_TILT 0.0
struct SPEraserContext
{
SPEventContext event_context;
/** accumulated shape which ultimately goes in svg:path */
SPCurve *accumulated;
/** canvas items for "comitted" segments */
GSList *segments;
/** canvas item for red "leading" segment */
SPCanvasItem *currentshape;
/** shape of red "leading" segment */
SPCurve *currentcurve;
/** left edge of the stroke; combined to get accumulated */
SPCurve *cal1;
/** right edge of the stroke; combined to get accumulated */
SPCurve *cal2;
/** left edge points for this segment */
NR::Point point1[SAMPLING_SIZE];
/** right edge points for this segment */
NR::Point point2[SAMPLING_SIZE];
/** number of edge points for this segment */
gint npoints;
/* repr */
Inkscape::XML::Node *repr;
/* Eraser */
NR::Point cur;
NR::Point vel;
double vel_max;
NR::Point acc;
NR::Point ang;
NR::Point last;
NR::Point del;
/* extended input data */
gdouble pressure;
gdouble xtilt;
gdouble ytilt;
/* attributes */
guint dragging : 1; /* mouse state: mouse is dragging */
guint usepressure : 1;
guint usetilt : 1;
double mass, drag;
double angle;
double width;
double vel_thin;
double flatness;
double tremor;
double cap_rounding;
Inkscape::MessageContext *_message_context;
bool is_drawing;
/** uses absolute width independent of zoom */
bool abs_width;
};
struct SPEraserContextClass
{
SPEventContextClass parent_class;
};
GtkType sp_eraser_context_get_type(void);
#endif // SP_ERASER_CONTEXT_H_SEEN
/*
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:encoding=utf-8:textwidth=99 :
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