class Gtk::GestureZoom
Overview
Gtk::GestureZoom
is a Gtk::Gesture
for 2-finger pinch/zoom gestures.
Whenever the distance between both tracked sequences changes, the [signal@Gtk.GestureZoom::scale-changed] signal is emitted to report the scale factor.
Defined in:
lib/gi-crystal/src/auto/gtk-4.0/gesture_zoom.crConstructors
-
.new : self
Returns a newly created
Gtk::Gesture
that recognizes pinch/zoom gestures. - .new(*, n_points : UInt32 | Nil = nil, name : String | Nil = nil, propagation_limit : Gtk::PropagationLimit | Nil = nil, propagation_phase : Gtk::PropagationPhase | Nil = nil, widget : Gtk::Widget | Nil = nil)
Class Method Summary
-
.g_type : UInt64
Returns the type id (GType) registered in GLib type system.
Instance Method Summary
-
#==(other : self)
Returns
true
if this reference is the same as other. -
#hash(hasher)
See
Object#hash(hasher)
- #scale_changed_signal
-
#scale_delta : Float64
Gets the scale delta.
Instance methods inherited from class Gtk::Gesture
==(other : self)
==,
begin_signal
begin_signal,
bounding_box : Gdk::Rectangle
bounding_box,
bounding_box_center(x : Float64, y : Float64) : Bool
bounding_box_center,
cancel_signal
cancel_signal,
device : Gdk::Device | Nil
device,
end_signal
end_signal,
group(gesture : Gtk::Gesture) : Nilgroup : GLib::List group, handles_sequence(sequence : Gdk::EventSequence | Nil) : Bool handles_sequence, hash(hasher) hash, is_active : Bool is_active, is_grouped_with(other : Gtk::Gesture) : Bool is_grouped_with, is_recognized : Bool is_recognized, last_event(sequence : Gdk::EventSequence | Nil) : Gdk::Event | Nil last_event, last_updated_sequence : Gdk::EventSequence | Nil last_updated_sequence, n_points : UInt32 n_points, n_points=(value : UInt32) : UInt32 n_points=, point(sequence : Gdk::EventSequence | Nil) : Bool point, sequence_state(sequence : Gdk::EventSequence) : Gtk::EventSequenceState sequence_state, sequence_state_changed_signal sequence_state_changed_signal, sequences : GLib::List sequences, set_sequence_state(sequence : Gdk::EventSequence, state : Gtk::EventSequenceState) : Bool set_sequence_state, state=(state : Gtk::EventSequenceState) : Bool state=, ungroup : Nil ungroup, update_signal update_signal
Constructor methods inherited from class Gtk::Gesture
newnew(*, n_points : UInt32 | Nil = nil, name : String | Nil = nil, propagation_limit : Gtk::PropagationLimit | Nil = nil, propagation_phase : Gtk::PropagationPhase | Nil = nil, widget : Gtk::Widget | Nil = nil) new
Class methods inherited from class Gtk::Gesture
g_type : UInt64
g_type
Instance methods inherited from class Gtk::EventController
==(other : self)
==,
current_event : Gdk::Event | Nil
current_event,
current_event_device : Gdk::Device | Nil
current_event_device,
current_event_state : Gdk::ModifierType
current_event_state,
current_event_time : UInt32
current_event_time,
hash(hasher)
hash,
name : String | Nil
name,
name=(value : String) : Stringname=(value : Nil) : Nil
name=(name : String | Nil) : Nil name=, name? : String | Nil name?, propagation_limit : Gtk::PropagationLimit propagation_limit, propagation_limit=(limit : Gtk::PropagationLimit) : Nil propagation_limit=, propagation_phase : Gtk::PropagationPhase propagation_phase, propagation_phase=(phase : Gtk::PropagationPhase) : Nil propagation_phase=, reset : Nil reset, widget : Gtk::Widget widget
Constructor methods inherited from class Gtk::EventController
newnew(*, name : String | Nil = nil, propagation_limit : Gtk::PropagationLimit | Nil = nil, propagation_phase : Gtk::PropagationPhase | Nil = nil, widget : Gtk::Widget | Nil = nil) new
Class methods inherited from class Gtk::EventController
g_type : UInt64
g_type
Instance methods inherited from class GObject::Object
==(other : self)
==,
bind_property(source_property : String, target : GObject::Object, target_property : String, flags : GObject::BindingFlags) : GObject::Binding
bind_property,
bind_property_full(source_property : String, target : GObject::Object, target_property : String, flags : GObject::BindingFlags, transform_to : GObject::Closure, transform_from : GObject::Closure) : GObject::Binding
bind_property_full,
data(key : String) : Pointer(Void) | Nil
data,
finalize
finalize,
freeze_notify : Nil
freeze_notify,
getv(names : Enumerable(String), values : Enumerable(_)) : Nil
getv,
hash(hasher)
hash,
notify(property_name : String) : Nil
notify,
notify_by_pspec(pspec : GObject::ParamSpec) : Nil
notify_by_pspec,
notify_signal
notify_signal,
property(property_name : String, value : _) : Nil
property,
qdata(quark : UInt32) : Pointer(Void) | Nil
qdata,
ref_count : UInt32
ref_count,
run_dispose : Nil
run_dispose,
set_data(key : String, data : Pointer(Void) | Nil) : Nil
set_data,
set_property(property_name : String, value : _) : Nil
set_property,
steal_data(key : String) : Pointer(Void) | Nil
steal_data,
steal_qdata(quark : UInt32) : Pointer(Void) | Nil
steal_qdata,
thaw_notify : Nil
thaw_notify,
to_unsafe : Pointer(Void)
to_unsafe,
watch_closure(closure : GObject::Closure) : Nil
watch_closure
Constructor methods inherited from class GObject::Object
cast(obj : GObject::Object) : self
cast,
new(pointer : Pointer(Void), transfer : GICrystal::Transfer)new new, newv(object_type : UInt64, parameters : Enumerable(GObject::Parameter)) : self newv
Class methods inherited from class GObject::Object
cast?(obj : GObject::Object) : self | Nil
cast?,
compat_control(what : UInt64, data : Pointer(Void) | Nil) : UInt64
compat_control,
g_type : UInt64
g_type,
interface_find_property(g_iface : GObject::TypeInterface, property_name : String) : GObject::ParamSpec
interface_find_property,
interface_list_properties(g_iface : GObject::TypeInterface) : Enumerable(GObject::ParamSpec)
interface_list_properties
Macros inherited from class GObject::Object
previous_vfunc(*args)
previous_vfunc,
previous_vfunc!(*args)
previous_vfunc!,
signal(signature)
signal
Constructor Detail
Class Method Detail
Returns the type id (GType) registered in GLib type system.
Instance Method Detail
Returns true
if this reference is the same as other. Invokes same?
.
Gets the 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.