Struct gdk::DeviceManager
source · [−]#[repr(transparent)]pub struct DeviceManager { /* private fields */ }
Expand description
In addition to a single pointer and keyboard for user interface input, GDK contains support for a variety of input devices, including graphics tablets, touchscreens and multiple pointers/keyboards interacting simultaneously with the user interface. Such input devices often have additional features, such as sub-pixel positioning information and additional device-dependent information.
In order to query the device hierarchy and be aware of changes in the
device hierarchy (such as virtual devices being created or removed, or
physical devices being plugged or unplugged), GDK provides
DeviceManager
.
By default, and if the platform supports it, GDK is aware of multiple
keyboard/pointer pairs and multitouch devices. This behavior can be
changed by calling gdk_disable_multidevice()
before Display::open()
.
There should rarely be a need to do that though, since GDK defaults
to a compatibility mode in which it will emit just one enter/leave
event pair for all devices on a window. To enable per-device
enter/leave events and other multi-pointer interaction features,
Window::set_support_multidevice()
must be called on
GdkWindows
(or gtk_widget_set_support_multidevice()
on widgets).
window. See the Window::set_support_multidevice()
documentation
for more information.
On X11, multi-device support is implemented through XInput 2.
Unless gdk_disable_multidevice()
is called, the XInput 2
DeviceManager
implementation will be used as the input source.
Otherwise either the core or XInput 1 implementations will be used.
For simple applications that don’t have any special interest in
input devices, the so-called “client pointer”
provides a reasonable approximation to a simple setup with a single
pointer and keyboard. The device that has been set as the client
pointer can be accessed via gdk_device_manager_get_client_pointer()
.
Conceptually, in multidevice mode there are 2 device types. Virtual devices (or master devices) are represented by the pointer cursors and keyboard foci that are seen on the screen. Physical devices (or slave devices) represent the hardware that is controlling the virtual devices, and thus have no visible cursor on the screen.
Virtual devices are always paired, so there is a keyboard device for every
pointer device. Associations between devices may be inspected through
Device::associated_device()
.
There may be several virtual devices, and several physical devices could be controlling each of these virtual devices. Physical devices may also be “floating”, which means they are not attached to any virtual device.
Master and slave devices
carlos@sacarino:~$ xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ Wacom ISDv4 E6 Pen stylus id=10 [slave pointer (2)]
⎜ ↳ Wacom ISDv4 E6 Finger touch id=11 [slave pointer (2)]
⎜ ↳ SynPS/2 Synaptics TouchPad id=13 [slave pointer (2)]
⎜ ↳ TPPS/2 IBM TrackPoint id=14 [slave pointer (2)]
⎜ ↳ Wacom ISDv4 E6 Pen eraser id=16 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ Video Bus id=7 [slave keyboard (3)]
↳ Sleep Button id=8 [slave keyboard (3)]
↳ Integrated Camera id=9 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=12 [slave keyboard (3)]
↳ ThinkPad Extra Buttons id=15 [slave keyboard (3)]
By default, GDK will automatically listen for events coming from all
master devices, setting the Device
for all events coming from input
devices. Events containing device information are EventType::MotionNotify
,
EventType::ButtonPress
, [EventType::_2buttonPress
][crate::EventType::_2buttonPress], [EventType::_3buttonPress
][crate::EventType::_3buttonPress],
EventType::ButtonRelease
, EventType::Scroll
, EventType::KeyPress
, EventType::KeyRelease
,
EventType::EnterNotify
, EventType::LeaveNotify
, EventType::FocusChange
,
EventType::ProximityIn
, EventType::ProximityOut
, EventType::DragEnter
, EventType::DragLeave
,
EventType::DragMotion
, EventType::DragStatus
, EventType::DropStart
, EventType::DropFinished
and EventType::GrabBroken
. When dealing with an event on a master device,
it is possible to get the source (slave) device that the event originated
from via gdk_event_get_source_device()
.
On a standard session, all physical devices are connected by default to the “Virtual Core Pointer/Keyboard” master devices, hence routing all events through these. This behavior is only modified by device grabs, where the slave device is temporarily detached for as long as the grab is held, and more permanently by user modifications to the device hierarchy.
On certain application specific setups, it may make sense
to detach a physical device from its master pointer, and mapping it to
an specific window. This can be achieved by the combination of
gdk_device_grab()
and Device::set_mode()
.
In order to listen for events coming from devices
other than a virtual device, Window::set_device_events()
must be
called. Generally, this function can be used to modify the event mask
for any given device.
Input devices may also provide additional information besides X/Y.
For example, graphics tablets may also provide pressure and X/Y tilt
information. This information is device-dependent, and may be
queried through gdk_device_get_axis()
. In multidevice mode, virtual
devices will change axes in order to always represent the physical
device that is routing events through it. Whenever the physical device
changes, the property::Device::n-axes
property will be notified, and
Device::list_axes()
will return the new device axes.
Devices may also have associated “keys” or
macro buttons. Such keys can be globally set to map into normal X
keyboard events. The mapping is set using Device::set_key()
.
In GTK+ 3.20, a new Seat
object has been introduced that
supersedes DeviceManager
and should be preferred in newly
written code.
This is an Abstract Base Class, you cannot instantiate it.
Implementations
sourceimpl DeviceManager
impl DeviceManager
sourcepub fn connect_device_added<F: Fn(&Self, &Device) + 'static>(
&self,
f: F
) -> SignalHandlerId
pub fn connect_device_added<F: Fn(&Self, &Device) + 'static>(
&self,
f: F
) -> SignalHandlerId
sourcepub fn connect_device_changed<F: Fn(&Self, &Device) + 'static>(
&self,
f: F
) -> SignalHandlerId
pub fn connect_device_changed<F: Fn(&Self, &Device) + 'static>(
&self,
f: F
) -> SignalHandlerId
The ::device-changed signal is emitted whenever a device has changed in the hierarchy, either slave devices being disconnected from their master device or connected to another one, or master devices being added or removed a slave device.
If a slave device is detached from all master devices
(Device::associated_device()
returns None
), its
DeviceType
will change to DeviceType::Floating
,
if it’s attached, it will change to DeviceType::Slave
.
device
the Device
that changed.
sourcepub fn connect_device_removed<F: Fn(&Self, &Device) + 'static>(
&self,
f: F
) -> SignalHandlerId
pub fn connect_device_removed<F: Fn(&Self, &Device) + 'static>(
&self,
f: F
) -> SignalHandlerId
sourceimpl DeviceManager
impl DeviceManager
pub fn disable_multidevice()
Trait Implementations
sourceimpl Clone for DeviceManager
impl Clone for DeviceManager
sourceimpl Debug for DeviceManager
impl Debug for DeviceManager
sourceimpl Display for DeviceManager
impl Display for DeviceManager
sourceimpl Hash for DeviceManager
impl Hash for DeviceManager
sourceimpl Ord for DeviceManager
impl Ord for DeviceManager
1.21.0 · sourceconst fn max(self, other: Self) -> Self
const fn max(self, other: Self) -> Self
1.21.0 · sourceconst fn min(self, other: Self) -> Self
const fn min(self, other: Self) -> Self
1.50.0 · sourceconst fn clamp(self, min: Self, max: Self) -> Selfwhere
Self: PartialOrd<Self>,
const fn clamp(self, min: Self, max: Self) -> Selfwhere
Self: PartialOrd<Self>,
sourceimpl ParentClassIs for DeviceManager
impl ParentClassIs for DeviceManager
sourceimpl<OT: ObjectType> PartialEq<OT> for DeviceManager
impl<OT: ObjectType> PartialEq<OT> for DeviceManager
sourceimpl<OT: ObjectType> PartialOrd<OT> for DeviceManager
impl<OT: ObjectType> PartialOrd<OT> for DeviceManager
sourcefn partial_cmp(&self, other: &OT) -> Option<Ordering>
fn partial_cmp(&self, other: &OT) -> Option<Ordering>
1.0.0 · sourceconst fn le(&self, other: &Rhs) -> bool
const fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moresourceimpl StaticType for DeviceManager
impl StaticType for DeviceManager
sourcefn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for DeviceManager
Auto Trait Implementations
impl RefUnwindSafe for DeviceManager
impl !Send for DeviceManager
impl !Sync for DeviceManager
impl Unpin for DeviceManager
impl UnwindSafe for DeviceManager
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
sourceimpl<T> Cast for Twhere
T: ObjectType,
impl<T> Cast for Twhere
T: ObjectType,
sourcefn upcast<T>(self) -> Twhere
T: ObjectType,
Self: IsA<T>,
fn upcast<T>(self) -> Twhere
T: ObjectType,
Self: IsA<T>,
T
. Read moresourcefn upcast_ref<T>(&self) -> &Twhere
T: ObjectType,
Self: IsA<T>,
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T: ObjectType,
Self: IsA<T>,
T
. Read moresourcefn downcast<T>(self) -> Result<T, Self>where
T: ObjectType,
Self: CanDowncast<T>,
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T: ObjectType,
Self: CanDowncast<T>,
T
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and upcast
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T: ObjectType,
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T: ObjectType,
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unconditionally. Read moresourceimpl<U> IsSubclassableExt for Uwhere
U: IsClass + ParentClassIs,
impl<U> IsSubclassableExt for Uwhere
U: IsClass + ParentClassIs,
fn parent_class_init<T>(class: &mut Class<U>)where
T: ObjectSubclass,
<U as ParentClassIs>::Parent: IsSubclassable<T>,
fn parent_instance_init<T>(instance: &mut InitializingObject<T>)where
T: ObjectSubclass,
<U as ParentClassIs>::Parent: IsSubclassable<T>,
sourceimpl<T> ObjectExt for Twhere
T: ObjectType,
impl<T> ObjectExt for Twhere
T: ObjectType,
sourcefn is<U>(&self) -> boolwhere
U: StaticType,
fn is<U>(&self) -> boolwhere
U: StaticType,
true
if the object is an instance of (can be cast to) T
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V: ToValue,
sourcefn set_property_from_value(&self, property_name: &str, value: &Value)
fn set_property_from_value(&self, property_name: &str, value: &Value)
sourcefn set_properties(&self, property_values: &[(&str, &dyn ToValue)])
fn set_properties(&self, property_values: &[(&str, &dyn ToValue)])
sourcefn set_properties_from_value(&self, property_values: &[(&str, Value)])
fn set_properties_from_value(&self, property_values: &[(&str, Value)])
sourcefn property<V>(&self, property_name: &str) -> Vwhere
V: 'static + for<'b> FromValue<'b>,
fn property<V>(&self, property_name: &str) -> Vwhere
V: 'static + for<'b> FromValue<'b>,
property_name
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ParamSpec
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fn list_properties(&self) -> PtrSlice<ParamSpec>
ParamSpec
of the properties of this object.sourcefn freeze_notify(&self) -> PropertyNotificationFreezeGuard
fn freeze_notify(&self) -> PropertyNotificationFreezeGuard
sourceunsafe fn set_qdata<QD>(&self, key: Quark, value: QD)where
QD: 'static,
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QD: 'static,
key
. Read moresourceunsafe fn qdata<QD>(&self, key: Quark) -> Option<NonNull<QD>>where
QD: 'static,
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QD: 'static,
key
. Read moresourceunsafe fn steal_qdata<QD>(&self, key: Quark) -> Option<QD>where
QD: 'static,
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QD: 'static,
key
. Read moresourceunsafe fn set_data<QD>(&self, key: &str, value: QD)where
QD: 'static,
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QD: 'static,
key
. Read moresourceunsafe fn data<QD>(&self, key: &str) -> Option<NonNull<QD>>where
QD: 'static,
unsafe fn data<QD>(&self, key: &str) -> Option<NonNull<QD>>where
QD: 'static,
key
. Read moresourceunsafe fn steal_data<QD>(&self, key: &str) -> Option<QD>where
QD: 'static,
unsafe fn steal_data<QD>(&self, key: &str) -> Option<QD>where
QD: 'static,
key
. Read moresourcefn block_signal(&self, handler_id: &SignalHandlerId)
fn block_signal(&self, handler_id: &SignalHandlerId)
sourcefn unblock_signal(&self, handler_id: &SignalHandlerId)
fn unblock_signal(&self, handler_id: &SignalHandlerId)
sourcefn stop_signal_emission(&self, signal_id: SignalId, detail: Option<Quark>)
fn stop_signal_emission(&self, signal_id: SignalId, detail: Option<Quark>)
sourcefn stop_signal_emission_by_name(&self, signal_name: &str)
fn stop_signal_emission_by_name(&self, signal_name: &str)
sourcefn connect<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value> + Send + Sync,
fn connect<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value> + Send + Sync,
signal_name
on this object. Read moresourcefn connect_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value> + Send + Sync,
fn connect_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value> + Send + Sync,
signal_id
on this object. Read moresourcefn connect_local<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value>,
fn connect_local<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value>,
signal_name
on this object. Read moresourcefn connect_local_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value>,
fn connect_local_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value>,
signal_id
on this object. Read moresourceunsafe fn connect_unsafe<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value>,
unsafe fn connect_unsafe<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value>,
signal_name
on this object. Read moresourceunsafe fn connect_unsafe_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value>,
unsafe fn connect_unsafe_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value>,
signal_id
on this object. Read moresourcefn connect_closure(
&self,
signal_name: &str,
after: bool,
closure: RustClosure
) -> SignalHandlerId
fn connect_closure(
&self,
signal_name: &str,
after: bool,
closure: RustClosure
) -> SignalHandlerId
signal_name
on this object. Read moresourcefn connect_closure_id(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
closure: RustClosure
) -> SignalHandlerId
fn connect_closure_id(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
closure: RustClosure
) -> SignalHandlerId
signal_id
on this object. Read moresourcefn watch_closure(&self, closure: &impl AsRef<Closure>)
fn watch_closure(&self, closure: &impl AsRef<Closure>)
closure
to the lifetime of the object. When
the object’s reference count drops to zero, the closure will be
invalidated. An invalidated closure will ignore any calls to
invoke_with_values
, or
invoke
when using Rust closures. Read moresourcefn emit<R>(&self, signal_id: SignalId, args: &[&dyn ToValue]) -> Rwhere
R: TryFromClosureReturnValue,
fn emit<R>(&self, signal_id: SignalId, args: &[&dyn ToValue]) -> Rwhere
R: TryFromClosureReturnValue,
sourcefn emit_with_values(&self, signal_id: SignalId, args: &[Value]) -> Option<Value>
fn emit_with_values(&self, signal_id: SignalId, args: &[Value]) -> Option<Value>
Self::emit
but takes Value
for the arguments.sourcefn emit_by_name<R>(&self, signal_name: &str, args: &[&dyn ToValue]) -> Rwhere
R: TryFromClosureReturnValue,
fn emit_by_name<R>(&self, signal_name: &str, args: &[&dyn ToValue]) -> Rwhere
R: TryFromClosureReturnValue,
sourcefn emit_by_name_with_values(
&self,
signal_name: &str,
args: &[Value]
) -> Option<Value>
fn emit_by_name_with_values(
&self,
signal_name: &str,
args: &[Value]
) -> Option<Value>
sourcefn emit_by_name_with_details<R>(
&self,
signal_name: &str,
details: Quark,
args: &[&dyn ToValue]
) -> Rwhere
R: TryFromClosureReturnValue,
fn emit_by_name_with_details<R>(
&self,
signal_name: &str,
details: Quark,
args: &[&dyn ToValue]
) -> Rwhere
R: TryFromClosureReturnValue,
sourcefn emit_by_name_with_details_and_values(
&self,
signal_name: &str,
details: Quark,
args: &[Value]
) -> Option<Value>
fn emit_by_name_with_details_and_values(
&self,
signal_name: &str,
details: Quark,
args: &[Value]
) -> Option<Value>
sourcefn emit_with_details<R>(
&self,
signal_id: SignalId,
details: Quark,
args: &[&dyn ToValue]
) -> Rwhere
R: TryFromClosureReturnValue,
fn emit_with_details<R>(
&self,
signal_id: SignalId,
details: Quark,
args: &[&dyn ToValue]
) -> Rwhere
R: TryFromClosureReturnValue,
sourcefn emit_with_details_and_values(
&self,
signal_id: SignalId,
details: Quark,
args: &[Value]
) -> Option<Value>
fn emit_with_details_and_values(
&self,
signal_id: SignalId,
details: Quark,
args: &[Value]
) -> Option<Value>
sourcefn disconnect(&self, handler_id: SignalHandlerId)
fn disconnect(&self, handler_id: SignalHandlerId)
sourcefn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: 'static + Fn(&T, &ParamSpec) + Send + Sync,
fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: 'static + Fn(&T, &ParamSpec) + Send + Sync,
notify
signal of the object. Read moresourcefn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: 'static + Fn(&T, &ParamSpec),
fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: 'static + Fn(&T, &ParamSpec),
notify
signal of the object. Read moresourceunsafe fn connect_notify_unsafe<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerIdwhere
F: Fn(&T, &ParamSpec),
unsafe fn connect_notify_unsafe<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerIdwhere
F: Fn(&T, &ParamSpec),
notify
signal of the object. Read more