PointerEventList

class PointerEventList

Bases: ParamValueBase

Records a set of pointer events that happened recently. This class is usually used only in the data graph, to transmit the recent pointer presses, but it may be used anywhere a list of PointerEvents is desired.

Inheritance diagram

PointerEventList(void)

void add_event(PointerData const &data, int seq, double time)

void add_event(bool in_win, int xpos, int ypos, int seq, double time)

void add_event(bool in_win, int xpos, int ypos, double xdelta, double ydelta, int seq, double time)

Adds a new event from the given PointerData object.

Adds a new event to the end of the list. Automatically calculates the dx, dy, length, direction, and rotation for all but the first event.

Adds a new event to the end of the list based on the given mouse movement.

void clear(void)

Empties all the events from the list.

bool encircles(int x, int y) const

Returns true if the trail loops around the specified point.

static TypeHandle get_class_type(void)

double get_direction(std::size_t n) const

Get the direction of the nth event.

double get_dx(std::size_t n) const

Get the x-delta of the nth event.

double get_dy(std::size_t n) const

Get the y-delta of the nth event.

bool get_in_window(std::size_t n) const

Get the in-window flag of the nth event.

double get_length(std::size_t n) const

Get the length of the nth event.

std::size_t get_num_events(void) const

Returns the number of events in the list.

double get_rotation(std::size_t n) const

Get the rotation of the nth event.

int get_sequence(std::size_t n) const

Get the sequence number of the nth event.

double get_time(std::size_t n) const

Get the timestamp of the nth event.

int get_xpos(std::size_t n) const

Get the x-coordinate of the nth event.

int get_ypos(std::size_t n) const

Get the y-coordinate of the nth event.

double match_pattern(std::string const &pattern, double rot, double seglen)

This function is not implemented yet. It is a work in progress. The intent is as follows:

Returns a nonzero value if the mouse movements match the specified pattern. The higher the value, the better the match. The pattern is a sequence of compass directions (ie, “E”, “NE”, etc) separated by spaces. If rot is nonzero, then the pattern is rotated counterclockwise by the specified amount before testing. Seglen is the minimum length a mouse movement needs to be in order to be considered significant.

void pop_front(void)

Discards the first event on the list.

double total_turns(double sec) const

returns the total angular deviation that the trail has made in the specified time period. A small number means that the trail is moving in a relatively straight line, a large number means that the trail is zig- zagging or spinning. The result is in degrees.