QItemSelection ¶

QItemSelection class manages information about selected items in a model. 更多 …

概要 ¶

函数 ¶

def __add__ (l)
def __eq__ (l)
def __iadd__ (l)
def __iadd__ (t)
def __lshift__ (l)
def __lshift__ (t)
def __ne__ (l)
def append (t)
def append (t)
def at (i)
def back ()
def clear ()
def constFirst ()
def constLast ()
def contains (index)
def count ()
def count (t)
def detachShared ()
def empty ()
def endsWith (t)
def first ()
def front ()
def indexOf (t[, from=0])
def indexes ()
def insert (i, t)
def isEmpty ()
def isSharedWith (other)
def last ()
def lastIndexOf (t[, from=-1])
def length ()
def merge (other, command)
def mid (pos[, length=-1])
def move (from, to)
def operator[] (i)
def pop_back ()
def pop_front ()
def prepend (t)
def push_back (t)
def push_front (t)
def removeAll (t)
def removeAt (i)
def removeFirst ()
def removeLast ()
def removeOne (t)
def replace (i, t)
def reserve (size)
def select (topLeft, bottomRight)
def setSharable (sharable)
def size ()
def startsWith (t)
def swap (i, j)
def swap (other)
def swapItemsAt (i, j)
def takeAt (i)
def takeFirst ()
def takeLast ()
def toSet ()
def toVector ()
def value (i)
def value (i, defaultValue)

静态函数 ¶

def fromSet (set)
def fromVector (vector)
def split (range, other, result)

详细描述 ¶

A QItemSelection describes the items in a model that have been selected by the user. A QItemSelection is basically a list of selection ranges, see QItemSelectionRange . It provides functions for creating and manipulating selections, and selecting a range of items from a model.

QItemSelection class is one of the 模型/视图类 and is part of Qt’s 模型/视图框架 .

An item selection can be constructed and initialized to contain a range of items from an existing model. The following example constructs a selection that contains a range of items from the given model , beginning at the topLeft , and ending at the bottomRight .
selection = QItemSelection(topLeft, bottomRight)
											
An empty item selection can be constructed, and later populated as required. So, if the model is going to be unavailable when we construct the item selection, we can rewrite the above code in the following way:
selection = QItemSelection()
...
selection.select(topLeft, bottomRight)
											
QItemSelection saves memory, and avoids unnecessary work, by working with selection ranges rather than recording the model item index for each item in the selection. Generally, an instance of this class will contain a list of non-overlapping selection ranges.

使用 merge() to merge one item selection into another without making overlapping ranges. Use split() to split one selection range into smaller ranges based on a another selection range.

另请参阅

模型/视图编程 QItemSelectionModel

class QItemSelection ¶

QItemSelection(QItemSelection)

QItemSelection(topLeft, bottomRight)

param QItemSelection

QItemSelection

param topLeft

QModelIndex

param bottomRight

QModelIndex

Constructs an empty selection.

Constructs an item selection that extends from the top-left model item, specified by the topLeft index, to the bottom-right item, specified by bottomRight .

PySide2.QtCore.QItemSelection. append ( t ) ¶

参数: t – QItemSelectionRange

PySide2.QtCore.QItemSelection. append ( t ) ¶

参数: t –

PySide2.QtCore.QItemSelection. at ( i ) ¶

参数: i – int
返回类型: QItemSelectionRange

PySide2.QtCore.QItemSelection. back ( ) ¶

返回类型: QItemSelectionRange

PySide2.QtCore.QItemSelection. clear ( ) ¶

PySide2.QtCore.QItemSelection. constFirst ( ) ¶

返回类型: QItemSelectionRange

PySide2.QtCore.QItemSelection. constLast ( ) ¶

返回类型: QItemSelectionRange

PySide2.QtCore.QItemSelection. contains ( index ) ¶

参数: index – QModelIndex
返回类型: bool

返回 true if the selection contains the given index ；否则返回 false .

PySide2.QtCore.QItemSelection. count ( ) ¶

返回类型: int

PySide2.QtCore.QItemSelection. count ( t ) ¶

参数: t – QItemSelectionRange
返回类型: int

PySide2.QtCore.QItemSelection. detachShared ( ) ¶

PySide2.QtCore.QItemSelection. empty ( ) ¶

返回类型: bool

PySide2.QtCore.QItemSelection. endsWith ( t ) ¶

参数: t – QItemSelectionRange
返回类型: bool

PySide2.QtCore.QItemSelection. first ( ) ¶

返回类型: QItemSelectionRange

static PySide2.QtCore.QItemSelection. fromSet ( set ) ¶

参数: set –
返回类型

注意

此函数被弃用。

static PySide2.QtCore.QItemSelection. fromVector ( vector ) ¶

参数: vector –
返回类型

PySide2.QtCore.QItemSelection. front ( ) ¶

返回类型: QItemSelectionRange

PySide2.QtCore.QItemSelection. indexOf ( t [ , from=0 ] ) ¶

参数

t – QItemSelectionRange
from – int

返回类型

int

PySide2.QtCore.QItemSelection. indexes ( ) ¶

返回类型: QModelIndexList

Returns a list of model indexes that correspond to the selected items.

PySide2.QtCore.QItemSelection. insert ( i , t ) ¶

参数

i – int
t – QItemSelectionRange

PySide2.QtCore.QItemSelection. isEmpty ( ) ¶

返回类型: bool

PySide2.QtCore.QItemSelection. isSharedWith ( other ) ¶

参数: other –
返回类型: bool

PySide2.QtCore.QItemSelection. last ( ) ¶

返回类型: QItemSelectionRange

PySide2.QtCore.QItemSelection. lastIndexOf ( t [ , from=-1 ] ) ¶

参数

t – QItemSelectionRange
from – int

返回类型

int

PySide2.QtCore.QItemSelection. length ( ) ¶

返回类型: int

PySide2.QtCore.QItemSelection. merge ( other , command ) ¶

参数

other – QItemSelection
command – SelectionFlags

Merges the other selection with this QItemSelection 使用 command given. This method guarantees that no ranges are overlapping.

Note that only 选择 , Deselect ，和 Toggle are supported.

另请参阅

split()

PySide2.QtCore.QItemSelection. mid ( pos [ , length=-1 ] ) ¶

参数

pos – int
length – int

返回类型

PySide2.QtCore.QItemSelection. move ( from , to ) ¶

参数

from – int
to – int

PySide2.QtCore.QItemSelection. __ne__ ( l ) ¶

参数: l –
返回类型: bool

PySide2.QtCore.QItemSelection. __add__ ( l ) ¶

参数: l –
返回类型

PySide2.QtCore.QItemSelection. __iadd__ ( t ) ¶

参数: t – QItemSelectionRange
返回类型

PySide2.QtCore.QItemSelection. __iadd__ ( l ) ¶

参数: l –
返回类型

PySide2.QtCore.QItemSelection. __lshift__ ( t ) ¶

参数: t – QItemSelectionRange
返回类型

PySide2.QtCore.QItemSelection. __lshift__ ( l ) ¶

参数: l –
返回类型

PySide2.QtCore.QItemSelection. __eq__ ( l ) ¶

参数: l –
返回类型: bool

PySide2.QtCore.QItemSelection.operator[](i)

参数: i – int
返回类型: QItemSelectionRange

PySide2.QtCore.QItemSelection. pop_back ( ) ¶

PySide2.QtCore.QItemSelection. pop_front ( ) ¶

PySide2.QtCore.QItemSelection. prepend ( t ) ¶

参数: t – QItemSelectionRange

PySide2.QtCore.QItemSelection. push_back ( t ) ¶

参数: t – QItemSelectionRange

PySide2.QtCore.QItemSelection. push_front ( t ) ¶

参数: t – QItemSelectionRange

PySide2.QtCore.QItemSelection. removeAll ( t ) ¶

参数: t – QItemSelectionRange
返回类型: int

PySide2.QtCore.QItemSelection. removeAt ( i ) ¶

参数: i – int

PySide2.QtCore.QItemSelection. removeFirst ( ) ¶

PySide2.QtCore.QItemSelection. removeLast ( ) ¶

PySide2.QtCore.QItemSelection. removeOne ( t ) ¶

参数: t – QItemSelectionRange
返回类型: bool

PySide2.QtCore.QItemSelection. replace ( i , t ) ¶

参数

i – int
t – QItemSelectionRange

PySide2.QtCore.QItemSelection. reserve ( size ) ¶

参数: size – int

PySide2.QtCore.QItemSelection. select ( topLeft , bottomRight ) ¶

参数

topLeft – QModelIndex
bottomRight – QModelIndex

Adds the items in the range that extends from the top-left model item, specified by the topLeft index, to the bottom-right item, specified by bottomRight to the list.

注意

topLeft and bottomRight must have the same parent.

PySide2.QtCore.QItemSelection. setSharable ( sharable ) ¶

参数: sharable – bool

PySide2.QtCore.QItemSelection. size ( ) ¶

返回类型: int

static PySide2.QtCore.QItemSelection. split ( range , other , result ) ¶

参数

range – QItemSelectionRange
other – QItemSelectionRange
result – QItemSelection

Splits the selection range using the selection other range. Removes all items in other from range and puts the result in result . This can be compared with the semantics of the subtract operation of a set.

另请参阅

merge()

PySide2.QtCore.QItemSelection. startsWith ( t ) ¶

参数: t – QItemSelectionRange
返回类型: bool

PySide2.QtCore.QItemSelection. swap ( i , j ) ¶

参数

i – int
j – int

注意

此函数被弃用。

PySide2.QtCore.QItemSelection. swap ( other ) ¶

参数: other –

PySide2.QtCore.QItemSelection. swapItemsAt ( i , j ) ¶

参数

i – int
j – int

PySide2.QtCore.QItemSelection. takeAt ( i ) ¶

参数: i – int
返回类型: QItemSelectionRange

PySide2.QtCore.QItemSelection. takeFirst ( ) ¶

返回类型: QItemSelectionRange

PySide2.QtCore.QItemSelection. takeLast ( ) ¶

返回类型: QItemSelectionRange

PySide2.QtCore.QItemSelection. toSet ( ) ¶

返回类型

注意

此函数被弃用。

PySide2.QtCore.QItemSelection. toVector ( ) ¶

返回类型

PySide2.QtCore.QItemSelection. value ( i ) ¶

参数: i – int
返回类型: QItemSelectionRange

PySide2.QtCore.QItemSelection. value ( i , defaultValue ) ¶

参数

i – int
defaultValue – QItemSelectionRange

返回类型

QItemSelectionRange

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QItemSelection ¶

概要 ¶

函数 ¶

静态函数 ¶

详细描述 ¶