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#ifndef SEEN_SP_KNOT_H
#define SEEN_SP_KNOT_H
/** \file
* Declarations for SPKnot: Desktop-bound visual control object.
*/
/*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
*
* Copyright (C) 1999-2002 authors
* Copyright (C) 2001-2002 Ximian, Inc.
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <2geom/point.h>
#include <sigc++/sigc++.h>
#include "knot-enums.h"
#include "enums.h"
class SPDesktop;
class SPItem;
struct SPCanvasItem;
typedef struct _GdkCursor GdkCursor;
typedef union _GdkEvent GdkEvent;
typedef unsigned int guint32;
#define SP_KNOT(obj) (dynamic_cast<SPKnot*>(static_cast<SPKnot*>(obj)))
#define SP_IS_KNOT(obj) (dynamic_cast<const SPKnot*>(static_cast<const SPKnot*>(obj)) != NULL)
/**
* Desktop-bound visual control object.
*
* A knot is a draggable object, with callbacks to change something by
* dragging it, visuably represented by a canvas item (mostly square).
*/
class SPKnot {
public:
SPKnot(SPDesktop *desktop, char const *tip);
virtual ~SPKnot();
int ref_count; // FIXME encapsulation
SPDesktop *desktop; /**< Desktop we are on. */
SPCanvasItem *item; /**< Our CanvasItem. */
SPItem *owner; /**< Optional Owner Item */
unsigned int flags;
unsigned int size; /**< Always square. */
double angle; /**< Angle of mesh handle. */
Geom::Point pos; /**< Our desktop coordinates. */
Geom::Point grabbed_rel_pos; /**< Grabbed relative position. */
Geom::Point drag_origin; /**< Origin of drag. */
SPAnchorType anchor; /**< Anchor. */
SPKnotShapeType shape; /**< Shape type. */
SPKnotModeType mode;
guint32 fill[SP_KNOT_VISIBLE_STATES];
guint32 stroke[SP_KNOT_VISIBLE_STATES];
unsigned char *image[SP_KNOT_VISIBLE_STATES];
GdkCursor *cursor[SP_KNOT_VISIBLE_STATES];
GdkCursor *saved_cursor;
void* pixbuf;
char *tip;
unsigned long _event_handler_id;
double pressure; /**< The tablet pen pressure when the knot is being dragged. */
// FIXME: signals should NOT need to emit the object they came from, the callee should
// be able to figure that out
sigc::signal<void, SPKnot *, unsigned int> click_signal;
sigc::signal<void, SPKnot*, unsigned int> doubleclicked_signal;
sigc::signal<void, SPKnot*, unsigned int> mousedown_signal;
sigc::signal<void, SPKnot*, unsigned int> grabbed_signal;
sigc::signal<void, SPKnot *, unsigned int> ungrabbed_signal;
sigc::signal<void, SPKnot *, Geom::Point const &, unsigned int> moved_signal;
sigc::signal<bool, SPKnot*, GdkEvent*> event_signal;
sigc::signal<bool, SPKnot*, Geom::Point*, unsigned int> request_signal;
//TODO: all the members above should eventualle become private, accessible via setters/getters
void setSize(unsigned int i);
void setShape(unsigned int i);
void setAnchor(unsigned int i);
void setMode(unsigned int i);
void setPixbuf(void* p);
void setAngle(double i);
void setFill(guint32 normal, guint32 mouseover, guint32 dragging);
void setStroke(guint32 normal, guint32 mouseover, guint32 dragging);
void setImage(unsigned char* normal, unsigned char* mouseover, unsigned char* dragging);
void setCursor(GdkCursor* normal, GdkCursor* mouseover, GdkCursor* dragging);
/**
* Show knot on its canvas.
*/
void show();
/**
* Hide knot on its canvas.
*/
void hide();
/**
* Set flag in knot, with side effects.
*/
void setFlag(unsigned int flag, bool set);
/**
* Update knot's pixbuf and set its control state.
*/
void updateCtrl();
/**
* Request or set new position for knot.
*/
void requestPosition(Geom::Point const &pos, unsigned int state);
/**
* Update knot for dragging and tell canvas an item was grabbed.
*/
void startDragging(Geom::Point const &p, int x, int y, guint32 etime);
/**
* Move knot to new position and emits "moved" signal.
*/
void setPosition(Geom::Point const &p, unsigned int state);
/**
* Move knot to new position, without emitting a MOVED signal.
*/
void moveto(Geom::Point const &p);
/**
* Returns position of knot.
*/
Geom::Point position() const;
private:
SPKnot(SPKnot const&);
SPKnot& operator=(SPKnot const&);
/**
* Set knot control state (dragging/mouseover/normal).
*/
void _setCtrlState();
};
void knot_ref(SPKnot* knot);
void knot_unref(SPKnot* knot);
#define SP_KNOT_IS_VISIBLE(k) ((k->flags & SP_KNOT_VISIBLE) != 0)
#define SP_KNOT_IS_MOUSEOVER(k) ((k->flags & SP_KNOT_MOUSEOVER) != 0)
#define SP_KNOT_IS_DRAGGING(k) ((k->flags & SP_KNOT_DRAGGING) != 0)
#define SP_KNOT_IS_GRABBED(k) ((k->flags & SP_KNOT_GRABBED) != 0)
void sp_knot_handler_request_position(GdkEvent *event, SPKnot *knot);
#endif // SEEN_SP_KNOT_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 :
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