Returns the relative angle from event1 to event2.
The relative angle is the angle between the X axis and the line through both events' positions. The rotation direction for positive angles is from the positive X axis towards the positive Y axis.
This assumes that both events have X/Y information. If not, this function returns %FALSE.
Extracts all axis values from an event.
To find out which axes are used, use [methodGdk.DeviceTool.get_axes]
on the device tool returned by [methodGdk.Event.get_device_tool].
Extracts delta information from a touchpad event.
Returns a GdkDeviceTool representing the tool that
caused the event.
If the was not generated by a device that supports different tools (such as a tablet), this function will return %NULL.
Note: the GdkDeviceTool will be constant during
the application lifetime, if settings must be stored
persistently across runs, see [methodGdk.DeviceTool.get_serial].
Retuns the event sequence to which the event belongs.
Related touch events are connected in a sequence. Other events typically don't have event sequence information.
Extracts the touchpad gesture phase from a touchpad event.
Retrieves the history of the device that event is for, as a list of
time and coordinates.
The history includes positions that are not delivered as separate events
to the application because they occurred in the same frame as event.
Note that only motion and scroll events record history, and motion events do it only if one of the mouse buttons is down, or the device has a tool.
Returns the modifier state field of an event.
Extracts the number of fingers from a touchpad event.
Extracts the angle delta from a touchpad pinch event.
Extracts the scale from a touchpad pinch event.
Returns whether this event is an 'emulated' pointer event.
Emulated pointer events typically originate from a touch events.
Extract the event surface relative x/y coordinates from an event.
Returns the timestamp of event.
Not all events have timestamps. In that case, this function returns %GDK_CURRENT_TIME.
Returns whether a GdkEvent should trigger a context menu,
according to platform conventions.
The right mouse button typically triggers context menus.
This function should always be used instead of simply checking for event->button == %GDK_BUTTON_SECONDARY.
Decrease the ref count of event.
If the last reference is dropped, the structure is freed.
An event related to a gesture on a touchpad device.
Unlike touchscreens, where the windowing system sends basic sequences of begin, update, end events, and leaves gesture recognition to the clients, touchpad gestures are typically processed by the system, resulting in these events.