class QItemSelection#

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

Synopsis#

Methods#

def __init__()
def append()
def at()
def back()
def capacity()
def clear()
def constData()
def constFirst()
def constLast()
def contains()
def count()
def data()
def empty()
def first()
def front()
def indexes()
def insert()
def isEmpty()
def isSharedWith()
def last()
def length()
def merge()
def mid()
def move()
def __ne__()
def __add__()
def __iadd__()
def __lshift__()
def __eq__()
def operator[]()
def pop_back()
def pop_front()
def prepend()
def push_back()
def push_front()
def remove()
def removeAll()
def removeAt()
def removeFirst()
def removeLast()
def removeOne()
def reserve()
def resize()
def select()
def shrink_to_fit()
def size()
def sliced()
def squeeze()
def swap()
def swapItemsAt()
def takeAt()
def toList()
def toVector()
def value()

Static functions#

def fromList()
def fromVector()
def split()

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

Detailed Description#

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

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.

The QItemSelection class is one of the Model/View Classes and is part of Qt’s model/view framework.

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.

Use 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.

See also

QItemSelectionModel

__init__(topLeft, bottomRight)#

Parameters:

topLeft – QModelIndex
bottomRight – QModelIndex

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.

__init__()

Constructs an empty selection.

append(l)#

Parameters:: l – .list of QItemSelectionRange

append(arg__1)

Parameters:: arg__1 – QItemSelectionRange

at(i)#

Parameters:: i – int
Return type:: QItemSelectionRange

back()#

Return type:: QItemSelectionRange

capacity()#

Return type:: int

clear()#

constData()#

Return type:: QItemSelectionRange

constFirst()#

Return type:: QItemSelectionRange

constLast()#

Return type:: QItemSelectionRange

contains(index)#

Parameters:: index – QModelIndex
Return type:: bool

Returns true if the selection contains the given index; otherwise returns false.

count()#

Return type:: int

data()#

Return type:: QItemSelectionRange

empty()#

Return type:: bool

first()#

Return type:: QItemSelectionRange

first(n)

Parameters:: n – int
Return type:: .list of QItemSelectionRange

static fromList(list)#

Parameters:: list – .list of QItemSelectionRange
Return type:: .list of QItemSelectionRange

static fromVector(vector)#

Parameters:: vector – .list of QItemSelectionRange
Return type:: .list of QItemSelectionRange

front()#

Return type:: QItemSelectionRange

indexes()#

Return type:: .list of QModelIndex

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

insert(arg__1, arg__2)#

Parameters:

arg__1 – int
arg__2 – QItemSelectionRange

isEmpty()#

Return type:: bool

isSharedWith(other)#

Parameters:: other – .list of QItemSelectionRange
Return type:: bool

last()#

Return type:: QItemSelectionRange

last(n)

Parameters:: n – int
Return type:: .list of QItemSelectionRange

length()#

Return type:: int

merge(other, command)#

Parameters:

other – QItemSelection
command – Combination of SelectionFlag

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

Note that only Select , Deselect , and Toggle are supported.

See also

split()

mid(pos[, len=-1])#

Parameters:

pos – int
len – int

Return type:

.list of QItemSelectionRange

move(from, to)#

Parameters:

from – int
to – int

__ne__(arg__1)#

Parameters:: arg__1 – QItemSelection
Return type:: bool

__add__(arg__1)#

Parameters:: arg__1 – QItemSelection
Return type:: QItemSelection

__iadd__(l)#

Parameters:: l – .list of QItemSelectionRange
Return type:: .list of QItemSelectionRange

__lshift__(l)#

Parameters:: l – .list of QItemSelectionRange
Return type:: .list of QItemSelectionRange

__eq__(arg__1)#

Parameters:: arg__1 – QItemSelection
Return type:: bool

operator(i)#

Parameters:: i – int
Return type:: QItemSelectionRange

pop_back()#

pop_front()#

prepend(arg__1)#

Parameters:: arg__1 – QItemSelectionRange

push_back(arg__1)#

Parameters:: arg__1 – QItemSelectionRange

push_front(arg__1)#

Parameters:: arg__1 – QItemSelectionRange

remove(i[, n=1])#

Parameters:

i – int
n – int

removeAll(arg__1)#

Parameters:: arg__1 – QItemSelectionRange

removeAt(i)#

Parameters:: i – int

removeFirst()#

removeLast()#

removeOne(arg__1)#

Parameters:: arg__1 – QItemSelectionRange

reserve(size)#

Parameters:: size – int

resize(size)#

Parameters:: size – int

select(topLeft, bottomRight)#

Parameters:

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.

Note

topLeft and bottomRight must have the same parent.

shrink_to_fit()#

size()#

Return type:: int

sliced(pos)#

Parameters:: pos – int
Return type:: .list of QItemSelectionRange

sliced(pos, n)

Parameters:

pos – int
n – int

Return type:

.list of QItemSelectionRange

static split(range, other, result)#

Parameters:

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.

See also

merge()

squeeze()#

swap(other)#

Parameters:: other – .list of QItemSelectionRange

swapItemsAt(i, j)#

Parameters:

i – int
j – int

takeAt(i)#

Parameters:: i – int
Return type:: QItemSelectionRange

toList()#

Return type:: .list of QItemSelectionRange

toVector()#

Return type:: .list of QItemSelectionRange

value(i)#

Parameters:: i – int
Return type:: QItemSelectionRange