ui/tools/freehand-base.h

	freehand-base.h revision 80948ca1924abf76c230192be97b379a8aa5d46e
#ifndef SEEN_SP_DRAW_CONTEXT_H
#define SEEN_SP_DRAW_CONTEXT_H

/*
 * Generic drawing context
 *
 * Author:
 *   Lauris Kaplinski <lauris@kaplinski.com>
 *
 * Copyright (C) 2000 Lauris Kaplinski
 * Copyright (C) 2000-2001 Ximian, Inc.
 * Copyright (C) 2002 Lauris Kaplinski
 *
 * Released under GNU GPL
 */

#include <sigc++/connection.h>

#include "ui/tools/tool-base.h"
#include "live_effects/effect-enum.h"

struct SPCanvasItem;
class SPCurve;
struct SPDrawAnchor;

namespace Inkscape {
    class Selection;
}

namespace boost {
    template<class T>
    class optional;
}

/* Freehand context */

#define SP_DRAW_CONTEXT(obj) (dynamic_cast<Inkscape::UI::Tools::FreehandBase*>((Inkscape::UI::Tools::ToolBase*)obj))
#define SP_IS_DRAW_CONTEXT(obj) (dynamic_cast<const Inkscape::UI::Tools::FreehandBase*>((const Inkscape::UI::Tools::ToolBase*)obj) != NULL)


namespace Inkscape {
namespace UI {
namespace Tools {

class FreehandBase : public ToolBase {
public:
    FreehandBase(gchar const *const *cursor_shape, gint hot_x, gint hot_y);
    virtual ~FreehandBase();

    Inkscape::Selection *selection;
    SPCanvasItem *grab;

    bool attach;

    guint32 red_color;
    guint32 blue_color;
    guint32 green_color;

    // Red
    SPCanvasItem *red_bpath;
    SPCurve *red_curve;

    // Blue
    SPCanvasItem *blue_bpath;
    SPCurve *blue_curve;

    // Blue2
    SPCanvasItem *blue2_bpath;
    SPCurve *blue2_curve;

    // Green
    GSList *green_bpaths;
    SPCurve *green_curve;
    SPDrawAnchor *green_anchor;
    gboolean green_closed; // a flag meaning we hit the green anchor, so close the path on itself

    // White
    SPItem *white_item;
    GSList *white_curves;
    GSList *white_anchors;

    //ALternative curve to use on continuing exisiting curve in case of bspline or spirolive
    //because usigh anchor curves give memory and random bugs, - and obscure code- in some plataform reported by su_v in mac
    SPCurve *overwriteCurve;

    // Start anchor
    SPDrawAnchor *sa;

    // End anchor
    SPDrawAnchor *ea;


    /* type of the LPE that is to be applied automatically to a finished path (if any) */
    Inkscape::LivePathEffect::EffectType waiting_LPE_type;

    sigc::connection sel_changed_connection;
    sigc::connection sel_modified_connection;

    bool red_curve_is_valid;

    bool anchor_statusbar;

protected:
    virtual void setup();
    virtual void finish();
    virtual void set(const Inkscape::Preferences::Entry& val);
    virtual bool root_handler(GdkEvent* event);
};

/**
 * Returns FIRST active anchor (the activated one).
 */
SPDrawAnchor *spdc_test_inside(FreehandBase *dc, Geom::Point p);

/**
 * Concats red, blue and green.
 * If any anchors are defined, process these, optionally removing curves from white list
 * Invoke _flush_white to write result back to object.
 */
void spdc_concat_colors_and_flush(FreehandBase *dc, gboolean forceclosed);

/**
 *  Snaps node or handle to PI/rotationsnapsperpi degree increments.
 *
 *  @param dc draw context.
 *  @param p cursor point (to be changed by snapping).
 *  @param o origin point.
 *  @param state  keyboard state to check if ctrl or shift was pressed.
 */
void spdc_endpoint_snap_rotation(ToolBase const *const ec, Geom::Point &p, Geom::Point const &o, guint state);

void spdc_endpoint_snap_free(ToolBase const *ec, Geom::Point &p, boost::optional<Geom::Point> &start_of_line, guint state);

/**
 * If we have an item and a waiting LPE, apply the effect to the item
 * (spiro spline mode is treated separately).
 */
void spdc_check_for_and_apply_waiting_LPE(FreehandBase *dc, SPItem *item);

/**
 * Create a single dot represented by a circle.
 */
void spdc_create_single_dot(ToolBase *ec, Geom::Point const &pt, char const *tool, guint event_state);

}
}
}

#endif // SEEN_SP_DRAW_CONTEXT_H

/*
  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 :