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pythonnet/src/runtime/eventbinding.cs at precise-API-references · ra2003/pythonnet · GitHub
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eventbinding.cs
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runtime
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eventbinding.cs
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using
System
;
namespace
Python
.
Runtime
{
/// <summary>
/// Implements a Python event binding type, similar to a method binding.
/// </summary>
[
Serializable
]
internal
class
EventBinding
:
ExtensionType
{
private
EventObject
e
;
private
PyObject
?
target
;
public
EventBinding
(
EventObject
e
,
PyObject
?
target
)
{
this
.
target
=
target
;
this
.
e
=
e
;
}
/// <summary>
/// EventBinding += operator implementation.
/// </summary>
public
static
NewReference
nb_inplace_add
(
BorrowedReference
ob
,
BorrowedReference
arg
)
{
var
self
=
(
EventBinding
)
GetManagedObject
(
ob
)
!
;
if
(
Runtime
.
PyCallable_Check
(
arg
)
<
1
)
{
Exceptions
.
SetError
(
Exceptions
.
TypeError
,
"event handlers must be callable"
)
;
return
default
;
}
if
(
!
self
.
e
.
AddEventHandler
(
self
.
target
.
BorrowNullable
(
)
,
new
PyObject
(
arg
)
)
)
{
return
default
;
}
return
new
NewReference
(
self
.
pyHandle
)
;
}
/// <summary>
/// EventBinding -= operator implementation.
/// </summary>
public
static
NewReference
nb_inplace_subtract
(
BorrowedReference
ob
,
BorrowedReference
arg
)
{
var
self
=
(
EventBinding
)
GetManagedObject
(
ob
)
!
;
if
(
Runtime
.
PyCallable_Check
(
arg
)
<
1
)
{
Exceptions
.
SetError
(
Exceptions
.
TypeError
,
"invalid event handler"
)
;
return
default
;
}
if
(
!
self
.
e
.
RemoveEventHandler
(
self
.
target
.
BorrowNullable
(
)
,
arg
)
)
{
return
default
;
}
return
new
NewReference
(
self
.
pyHandle
)
;
}
/// <summary>
/// EventBinding __hash__ implementation.
/// </summary>
public
static
nint
tp_hash
(
BorrowedReference
ob
)
{
var
self
=
(
EventBinding
)
GetManagedObject
(
ob
)
!
;
nint
x
=
0
;
if
(
self
.
target
!=
null
)
{
x
=
Runtime
.
PyObject_Hash
(
self
.
target
)
;
if
(
x
==
-
1
)
{
return
x
;
}
}
nint
y
=
Runtime
.
PyObject_Hash
(
self
.
e
.
pyHandle
)
;
if
(
y
==
-
1
)
{
return
y
;
}
return
x
^
y
;
}
/// <summary>
/// EventBinding __repr__ implementation.
/// </summary>
public
static
NewReference
tp_repr
(
BorrowedReference
ob
)
{
var
self
=
(
EventBinding
)
GetManagedObject
(
ob
)
!
;
string
type
=
self
.
target
==
null
?
"unbound"
:
"bound"
;
string
s
=
string
.
Format
(
"<{0} event '{1}'>"
,
type
,
self
.
e
.
name
)
;
return
Runtime
.
PyString_FromString
(
s
)
;
}
protected
override
void
Clear
(
BorrowedReference
ob
)
{
Runtime
.
Py_CLEAR
(
ref
this
.
target
)
;
base
.
Clear
(
ob
)
;
}
}
}
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