QItemSelection Class Reference
[QtGui module]
The QItemSelection class manages information about selected
items in a model. More...
Methods
- __init__ (self)
- __init__ (self, QModelIndex topLeft, QModelIndex bottomRight)
- __init__ (self, QItemSelection)
- append (self, QItemSelectionRange range)
- clear (self)
- bool contains (self, QModelIndex index)
- int count (self, QItemSelectionRange range)
- int count (self)
- QItemSelectionRange first (self)
- list-of-QModelIndex indexes (self)
- int indexOf (self, QItemSelectionRange value, int from = 0)
- insert (self, int i, QItemSelectionRange range)
- bool isEmpty (self)
- QItemSelectionRange last (self)
- int lastIndexOf (self, QItemSelectionRange value, int from = -1)
- merge (self, QItemSelection other, QItemSelectionModel.SelectionFlags command)
- move (self, int from, int to)
- prepend (self, QItemSelectionRange range)
- int removeAll (self, QItemSelectionRange range)
- removeAt (self, int i)
- replace (self, int i, QItemSelectionRange range)
- select (self, QModelIndex topLeft, QModelIndex bottomRight)
- swap (self, int i, int j)
- QItemSelectionRange takeAt (self, int i)
- QItemSelectionRange takeFirst (self)
- QItemSelectionRange takeLast (self)
Static Methods
- split (QItemSelectionRange range, QItemSelectionRange other, QItemSelection result)
Special Methods
- int __contains__ (self, QModelIndex index)
- __delitem__ (self, int i)
- __delitem__ (self, slice slice)
- bool __eq__ (self, QItemSelection other)
- QItemSelectionRange __getitem__ (self, int i)
- QItemSelection __getitem__ (self, slice slice)
- QItemSelection __iadd__ (self, QItemSelection other)
- QItemSelection __iadd__ (self, QItemSelectionRange value)
- __len__ (self)
- bool __ne__ (self, QItemSelection other)
- __setitem__ (self, int i, QItemSelectionRange range)
- __setitem__ (self, slice slice, QItemSelection list)
Detailed Description
The QItemSelection class manages information about selected
items in a model.
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.
QItemSelection *selection = new 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:
QItemSelection *selection = new 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.
Method Documentation
QItemSelection.__init__ (self)
Constructs an empty selection.
QItemSelection.__init__ (self, QModelIndex topLeft, QModelIndex bottomRight)
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.
QItemSelection.__init__ (self, QItemSelection)
QItemSelection.clear (self)
bool QItemSelection.contains (self, QModelIndex index)
Returns true if the selection contains the given index;
otherwise returns false.
int QItemSelection.count (self, QItemSelectionRange range)
int QItemSelection.count (self)
list-of-QModelIndex QItemSelection.indexes (self)
Returns a list of model indexes that correspond to the selected
items.
int QItemSelection.indexOf (self, QItemSelectionRange value, int from = 0)
QItemSelection.insert (self, int i, QItemSelectionRange range)
bool QItemSelection.isEmpty (self)
int QItemSelection.lastIndexOf (self, QItemSelectionRange value, int from = -1)
Merges the other selection with this QItemSelection using the command
given. This method guarantees that no ranges are overlapping.
Note that only QItemSelectionModel.Select,
QItemSelectionModel.Deselect,
and QItemSelectionModel.Toggle
are supported.
See also split().
QItemSelection.move (self, int from, int to)
int QItemSelection.removeAll (self, QItemSelectionRange range)
QItemSelection.removeAt (self, int i)
QItemSelection.replace (self, int i, QItemSelectionRange range)
QItemSelection.select (self, QModelIndex topLeft, QModelIndex bottomRight)
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.
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().
QItemSelection.swap (self, int i, int j)
int QItemSelection.__contains__ (self, QModelIndex index)
QItemSelection.__delitem__ (self, int i)
QItemSelection.__delitem__ (self, slice slice)
bool QItemSelection.__eq__ (self, QItemSelection other)
QItemSelectionRange QItemSelection.__getitem__ (self, int i)
QItemSelection QItemSelection.__getitem__ (self, slice slice)
QItemSelection.__len__ (self)
bool QItemSelection.__ne__ (self, QItemSelection other)
QItemSelection.__setitem__ (self, int i, QItemSelectionRange range)
QItemSelection.__setitem__ (self, slice slice, QItemSelection list)
