GestureZoom

Object Hierarchy:

Description:

[ CCode ( type_id = "gtk_gesture_zoom_get_type ()" ) ]
public class GestureZoom : Gesture

Recognizes 2-finger pinch/zoom gestures.

Whenever the distance between both tracked sequences changes, the [signal@Gtk.GestureZoom:GtkGestureZoom:scale-changed] signal is emitted to report the scale factor.

Namespace: Gtk

Package: gtk+-3.0

Content:

Creation methods:

public GestureZoom (Widget widget)
Returns a newly created `GtkGesture` that recognizes pinch/zoom gestures.

Methods:

public double get_scale_delta ()
Gets the scale delta.

Signals:

public signal void scale_changed (double scale)
Emitted whenever the distance between both tracked sequences changes.

Inherited Members:

All known members inherited from class Gtk.Gesture

begin
cancel
end
get_bounding_box
get_bounding_box_center
get_device
get_group
get_last_event
get_last_updated_sequence

get_point
get_sequence_state
get_sequences
get_window
group
handles_sequence
is_active
is_grouped_with
is_recognized

n_points
sequence_state_changed
set_sequence_state
set_state
set_window
ungroup
update
window

All known members inherited from class Gtk.EventController

get_propagation_phase
get_widget
handle_event

propagation_phase
reset

set_propagation_phase
widget

All known members inherited from class GLib.Object

@get
@new
@ref
@set
add_toggle_ref
add_weak_pointer
bind_property
connect
constructed
disconnect
dispose
dup_data
dup_qdata
force_floating
freeze_notify
get_class
get_data

get_property
get_qdata
get_type
getv
interface_find_property
interface_install_property
interface_list_properties
is_floating
new_valist
new_with_properties
newv
notify
notify_property
ref_count
ref_sink
remove_toggle_ref
remove_weak_pointer

replace_data
replace_qdata
set_data
set_data_full
set_property
set_qdata
set_qdata_full
set_valist
setv
steal_data
steal_qdata
thaw_notify
unref
watch_closure
weak_ref
weak_unref