#ifndef SEEN_SP_EVENT_CONTEXT_H

#define SEEN_SP_EVENT_CONTEXT_H

#include <glib-object.h>

#include <gdk/gdk.h>

#include <sigc++/trackable.h>

#include "knot.h"

#include "2geom/forward.h"

#include "preferences.h"

class GrDrag;

class SPDesktop;

class SPItem;

class ShapeEditor;

namespace Inkscape {

class MessageContext;

class SelCue;

namespace XML {

class Node;

}

}

#define SP_EVENT_CONTEXT(obj) (dynamic_cast<Inkscape::UI::Tools::ToolBase*>((Inkscape::UI::Tools::ToolBase*)obj))

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

namespace Inkscape {

namespace UI {

namespace Tools {

class ToolBase;

gboolean sp_event_context_snap_watchdog_callback(gpointer data);

void sp_event_context_discard_delayed_snap_event(ToolBase *ec);

class DelayedSnapEvent

{

public:

enum DelayedSnapEventOrigin {

UNDEFINED_HANDLER = 0,

EVENTCONTEXT_ROOT_HANDLER,

EVENTCONTEXT_ITEM_HANDLER,

KNOT_HANDLER,

CONTROL_POINT_HANDLER,

GUIDE_HANDLER,

GUIDE_HRULER,

GUIDE_VRULER

};

DelayedSnapEvent(ToolBase *event_context, gpointer const dse_item, gpointer dse_item2, GdkEventMotion const *event, DelayedSnapEvent::DelayedSnapEventOrigin const origin)

: _timer_id(0), _event(NULL), _item(dse_item), _item2(dse_item2), _origin(origin), _event_context(event_context)

{

Inkscape::Preferences *prefs = Inkscape::Preferences::get();

double value = prefs->getDoubleLimited("/options/snapdelay/value", 0, 0, 1000);

_timer_id = g_timeout_add(value, &sp_event_context_snap_watchdog_callback, this);

_event = gdk_event_copy((GdkEvent*) event);

((GdkEventMotion *)_event)->time = GDK_CURRENT_TIME;

}

~DelayedSnapEvent() {

if (_timer_id > 0) g_source_remove(_timer_id); // Kill the watchdog

if (_event != NULL) gdk_event_free(_event); // Remove the copy of the original event

}

ToolBase* getEventContext() {return _event_context;}

DelayedSnapEventOrigin getOrigin() {return _origin;}

GdkEvent* getEvent() {return _event;}

gpointer getItem() {return _item;}

gpointer getItem2() {return _item2;}

private:

guint _timer_id;

GdkEvent* _event;

gpointer _item;

gpointer _item2;

DelayedSnapEventOrigin _origin;

ToolBase* _event_context;

};

void sp_event_context_snap_delay_handler(ToolBase *ec, gpointer const dse_item, gpointer const dse_item2, GdkEventMotion *event, DelayedSnapEvent::DelayedSnapEventOrigin origin);

class ToolBase

: public sigc::trackable

{

public:

void enableSelectionCue (bool enable=true);

void enableGrDrag (bool enable=true);

bool deleteSelectedDrag(bool just_one);

ToolBase(gchar const *const *cursor_shape, gint hot_x, gint hot_y);

virtual ~ToolBase();

Inkscape::Preferences::Observer *pref_observer;

GdkCursor *cursor;

gint xp, yp; ///< where drag started

gint tolerance;

bool within_tolerance; ///< are we still within tolerance of origin

SPItem *item_to_select; ///< the item where mouse_press occurred, to

///< be selected if this is a click not drag

Inkscape::MessageContext *defaultMessageContext() {

return message_context;

}

Inkscape::MessageContext *message_context;

Inkscape::SelCue *_selcue;

GrDrag *_grdrag;

GrDrag *get_drag () {return _grdrag;}

ShapeEditor* shape_editor;

bool space_panning;

DelayedSnapEvent *_delayed_snap_event;

bool _dse_callback_in_process;

virtual void setup();

virtual void finish();

// Is called by our pref_observer if a preference has been changed.

virtual void set(const Inkscape::Preferences::Entry& val);

virtual bool root_handler(GdkEvent* event);

virtual bool item_handler(SPItem* item, GdkEvent* event);

virtual const std::string& getPrefsPath() = 0;

/**

class ToolPrefObserver: public Inkscape::Preferences::Observer {

public:

ToolPrefObserver(Glib::ustring const &path, ToolBase *ec) :

Inkscape::Preferences::Observer(path), ec(ec) {

}

virtual void notify(Inkscape::Preferences::Entry const &val) {

ec->set(val);

}

private:

ToolBase * const ec;

};

SPDesktop const& getDesktop() const;

void sp_event_context_update_cursor();

SPDesktop *desktop;

protected:

/// An xpm containing the shape of the tool's cursor.

gchar const *const *cursor_shape;

/// The cursor's hot spot

gint hot_x, hot_y;

bool sp_event_context_knot_mouseover() const;

private:

ToolBase(const ToolBase&);

ToolBase& operator=(const ToolBase&);

void sp_event_context_set_cursor(GdkCursorType cursor_type);

};

void sp_event_context_read(ToolBase *ec, gchar const *key);

gint sp_event_context_root_handler(ToolBase *ec, GdkEvent *event);

gint sp_event_context_virtual_root_handler(ToolBase *ec, GdkEvent *event);

gint sp_event_context_item_handler(ToolBase *ec, SPItem *item, GdkEvent *event);

gint sp_event_context_virtual_item_handler(ToolBase *ec, SPItem *item, GdkEvent *event);

void sp_event_root_menu_popup(SPDesktop *desktop, SPItem *item, GdkEvent *event);

gint gobble_key_events(guint keyval, gint mask);

gint gobble_motion_events(gint mask);

void sp_event_show_modifier_tip(Inkscape::MessageContext *message_context, GdkEvent *event,

gchar const *ctrl_tip, gchar const *shift_tip, gchar const *alt_tip);

guint get_group0_keyval(GdkEventKey *event);

SPItem *sp_event_context_find_item (SPDesktop *desktop, Geom::Point const &p, bool select_under, bool into_groups);

SPItem *sp_event_context_over_item (SPDesktop *desktop, SPItem *item, Geom::Point const &p);

void sp_toggle_dropper(SPDesktop *dt);

bool sp_event_context_knot_mouseover(ToolBase *ec);

} // namespace Tools

namespace Tool {

template<class Derived, typename T>

bool is_a(const T* t) {

//static_assert(std::is_base_of<Tools::ToolBase, Derived>(), "Destination type not derived from ToolBase.");

//static_assert(std::is_convertible<const Tools::ToolBase*, const T*>(), "Cannot cast passed pointer to ToolBase*.");

return dynamic_cast<const Derived*>(static_cast<const Tools::ToolBase*>(t)) != NULL;

}

template<class Derived, typename T>

Derived* to(T* t) {

//static_assert(std::is_base_of<Tools::ToolBase, Derived>(), "Destination type not derived from ToolBase.");

//static_assert(std::is_convertible<Tools::ToolBase*, T*>(), "Cannot cast passed pointer to ToolBase*.");

return dynamic_cast<Derived*>(static_cast<Tools::ToolBase*>(t));

}

} // namespace Tool

} // namespace UI

} // namespace Inkscape

#endif // SEEN_SP_EVENT_CONTEXT_H