Function

Gdkevents_get_angle

since: 3.0

Declaration [src]

gboolean
gdk_events_get_angle (
  GdkEvent* event1,
  GdkEvent* event2,
  gdouble* angle
)

Description [src]

If both events contain X/Y information, this function will return TRUE and return in angle the relative angle from event1 to event2. The rotation direction for positive angles is from the positive X axis towards the positive Y axis.

Available since: 3.0

Parameters

event1

Type: GdkEvent

First GdkEvent.

The data is owned by the caller of the function.

event2

Type: GdkEvent

Second GdkEvent.

The data is owned by the caller of the function.

angle

Type: gdouble*

Return location for the relative angle between both events.

The argument will be set by the function.

Return value

Type: gboolean

TRUE if the angle could be calculated.