pub struct Cursor { /* private fields */ }
Expand description
Cursor
is used to create and destroy cursors.
Cursors are immutable objects, so once you created them, there is no way to modify them later. You should create a new cursor when you want to change something about it.
Cursors by themselves are not very interesting: they must be bound to a
window for users to see them. This is done with SurfaceExt::set_cursor()
or SurfaceExt::set_device_cursor()
. Applications will typically
use higher-level GTK functions such as gtk_widget_set_cursor()
instead.
Cursors are not bound to a given Display
, so they can be shared.
However, the appearance of cursors may vary when used on different
platforms.
§Named and texture cursors
There are multiple ways to create cursors. The platform’s own cursors
can be created with from_name()
. That function lists
the commonly available names that are shared with the CSS specification.
Other names may be available, depending on the platform in use. On some
platforms, what images are used for named cursors may be influenced by
the cursor theme.
Another option to create a cursor is to use from_texture()
and provide an image to use for the cursor.
To ease work with unsupported cursors, a fallback cursor can be provided.
If a Surface
cannot use a cursor because of the reasons mentioned
above, it will try the fallback cursor. Fallback cursors can themselves have
fallback cursors again, so it is possible to provide a chain of progressively
easier to support cursors. If none of the provided cursors can be supported,
the default cursor will be the ultimate fallback.
§Properties
§fallback
Cursor to fall back to if this cursor cannot be displayed.
Readable | Writeable | Construct Only
§hotspot-x
X position of the cursor hotspot in the cursor image.
Readable | Writeable | Construct Only
§hotspot-y
Y position of the cursor hotspot in the cursor image.
Readable | Writeable | Construct Only
§name
Name of this this cursor.
The name will be None
if the cursor was created from a texture.
Readable | Writeable | Construct Only
§texture
The texture displayed by this cursor.
The texture will be None
if the cursor was created from a name.
Readable | Writeable | Construct Only
Implementations§
source§impl Cursor
impl Cursor
sourcepub fn from_name(name: &str, fallback: Option<&Cursor>) -> Option<Cursor>
pub fn from_name(name: &str, fallback: Option<&Cursor>) -> Option<Cursor>
Creates a new cursor by looking up @name in the current cursor theme.
A recommended set of cursor names that will work across different platforms can be found in the CSS specification:
“none” | ![]() | ![]() | ![]() |
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§name
the name of the cursor
§fallback
None
or the Cursor
to fall back to when
this one cannot be supported
§Returns
a new Cursor
, or None
if there is no
cursor with the given name
sourcepub fn from_texture(
texture: &impl IsA<Texture>,
hotspot_x: i32,
hotspot_y: i32,
fallback: Option<&Cursor>
) -> Cursor
pub fn from_texture( texture: &impl IsA<Texture>, hotspot_x: i32, hotspot_y: i32, fallback: Option<&Cursor> ) -> Cursor
Creates a new cursor from a Texture
.
§texture
the texture providing the pixel data
§hotspot_x
the horizontal offset of the “hotspot” of the cursor
§hotspot_y
the vertical offset of the “hotspot” of the cursor
§fallback
the Cursor
to fall back to when
this one cannot be supported
§Returns
a new Cursor
sourcepub fn builder() -> CursorBuilder
pub fn builder() -> CursorBuilder
Creates a new builder-pattern struct instance to construct Cursor
objects.
This method returns an instance of CursorBuilder
which can be used to create Cursor
objects.
sourcepub fn fallback(&self) -> Option<Cursor>
pub fn fallback(&self) -> Option<Cursor>
Returns the fallback for this @self.
The fallback will be used if this cursor is not available on a given
Display
. For named cursors, this can happen when using nonstandard
names or when using an incomplete cursor theme. For textured cursors,
this can happen when the texture is too large or when the Display
it is used on does not support textured cursors.
§Returns
the fallback of the cursor or None
to use the default cursor as fallback
sourcepub fn hotspot_x(&self) -> i32
pub fn hotspot_x(&self) -> i32
Returns the horizontal offset of the hotspot.
The hotspot indicates the pixel that will be directly above the cursor.
Note that named cursors may have a nonzero hotspot, but this function
will only return the hotspot position for cursors created with
from_texture()
.
§Returns
the horizontal offset of the hotspot or 0 for named cursors
sourcepub fn hotspot_y(&self) -> i32
pub fn hotspot_y(&self) -> i32
Returns the vertical offset of the hotspot.
The hotspot indicates the pixel that will be directly above the cursor.
Note that named cursors may have a nonzero hotspot, but this function
will only return the hotspot position for cursors created with
from_texture()
.
§Returns
the vertical offset of the hotspot or 0 for named cursors
Trait Implementations§
source§impl HasParamSpec for Cursor
impl HasParamSpec for Cursor
source§impl Ord for Cursor
impl Ord for Cursor
source§impl<OT: ObjectType> PartialEq<OT> for Cursor
impl<OT: ObjectType> PartialEq<OT> for Cursor
source§impl<OT: ObjectType> PartialOrd<OT> for Cursor
impl<OT: ObjectType> PartialOrd<OT> for Cursor
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moresource§impl StaticType for Cursor
impl StaticType for Cursor
source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for Cursor
Auto Trait Implementations§
impl Freeze for Cursor
impl RefUnwindSafe for Cursor
impl !Send for Cursor
impl !Sync for Cursor
impl Unpin for Cursor
impl UnwindSafe for Cursor
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) -> Option<Value>
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source§fn disconnect(&self, handler_id: SignalHandlerId)
fn disconnect(&self, handler_id: SignalHandlerId)
source§fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
notify
signal of the object. Read moresource§fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
notify
signal of the object. Read moresource§unsafe fn connect_notify_unsafe<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerId
unsafe fn connect_notify_unsafe<F>( &self, name: Option<&str>, f: F ) -> SignalHandlerId
notify
signal of the object. Read more