Class

PhocGestureZoom

[−]

Description [src]

class Phoc.GestureZoom : Phoc.Gesture
{
  /* No available fields */
}

A zoom gesture

PhocGestureZoom is a PhocGesture implementation able to recognize pinch/zoom gestures, whenever the distance between both tracked sequences changes, the PhocGestureZoom::scale-changed signal is emitted to report the scale factor.

[−]

Ancestors

[−]

Constructors

phoc_gesture_zoom_new

Returns a newly created PhocGesture that recognizes zoom in/out gestures (usually known as pinch/zoom).

[−]

Instance methods

phoc_gesture_zoom_get_scale_delta

If gesture is active, this function returns the zooming difference since the gesture was recognized (hence the starting point is considered 1:1). If gesture is not active, 1 is returned.

[+]

Methods inherited from GObject (43)

[−]

Properties

[+]

Properties inherited from PhocGesture (1)

[−]

Signals

Phoc.GestureZoom::scale-changed

This signal is emitted whenever the distance between both tracked sequences changes.

[+]

Signals inherited from PhocGesture (5)

[+]

Signals inherited from GObject (1)

[+]

Class structure

struct PhocGestureZoomClass {
  PhocGestureClass parent_class;
  void (* scale_changed) (
    PhocGestureZoom* self,
    gdouble scale
  );
  
}

[−]

Virtual methods

Phoc.GestureZoomClass.scale_changed

No description available.