QItemSelectionRange Class
The QItemSelectionRange class manages information about a range of selected items in a model. More...
| Header: | #include <QItemSelectionRange> |
| qmake: | QT += core |
Public Functions
| QItemSelectionRange(const QModelIndex &index) | |
| QItemSelectionRange(const QModelIndex &topLeft, const QModelIndex &bottomRight) | |
| QItemSelectionRange(const QItemSelectionRange &other) | |
| QItemSelectionRange() | |
| int | bottom() const |
| const QPersistentModelIndex & | bottomRight() const |
| bool | contains(const QModelIndex &index) const |
| bool | contains(int row, int column, const QModelIndex &parentIndex) const |
| int | height() const |
| QModelIndexList | indexes() const |
| QItemSelectionRange | intersected(const QItemSelectionRange &other) const |
| bool | intersects(const QItemSelectionRange &other) const |
| bool | isEmpty() const |
| bool | isValid() const |
| int | left() const |
| const QAbstractItemModel * | model() const |
| QModelIndex | parent() const |
| int | right() const |
| void | swap(QItemSelectionRange &other) |
| int | top() const |
| const QPersistentModelIndex & | topLeft() const |
| int | width() const |
| bool | operator!=(const QItemSelectionRange &other) const |
| bool | operator<(const QItemSelectionRange &other) const |
| bool | operator==(const QItemSelectionRange &other) const |
Detailed Description
A QItemSelectionRange contains information about a range of selected items in a model. A range of items is a contiguous array of model items, extending to cover a number of adjacent rows and columns with a common parent item; this can be visualized as a two-dimensional block of cells in a table. A selection range has a top(), left() a bottom(), right() and a parent().
The QItemSelectionRange class is one of the Model/View Classes and is part of Qt's model/view framework.
The model items contained in the selection range can be obtained using the indexes() function. Use QItemSelectionModel::selectedIndexes() to get a list of all selected items for a view.
You can determine whether a given model item lies within a particular range by using the contains() function. Ranges can also be compared using the overloaded operators for equality and inequality, and the intersects() function allows you to determine whether two ranges overlap.
See also Model/View Programming, QAbstractItemModel, QItemSelection, and QItemSelectionModel.
Member Function Documentation
QItemSelectionRange::QItemSelectionRange(const QModelIndex &index)
Constructs a new selection range containing only the model item specified by the model index index.
QItemSelectionRange::QItemSelectionRange(const QModelIndex &topLeft, const QModelIndex &bottomRight)
Constructs a new selection range containing only the index specified by the topLeft and the index bottomRight.
QItemSelectionRange::QItemSelectionRange(const QItemSelectionRange &other)
Copy constructor. Constructs a new selection range with the same contents as the other range given.
QItemSelectionRange::QItemSelectionRange()
Constructs an empty selection range.
int QItemSelectionRange::bottom() const
Returns the row index corresponding to the lowermost selected row in the selection range.
const QPersistentModelIndex &QItemSelectionRange::bottomRight() const
Returns the index for the item located at the bottom-right corner of the selection range.
See also bottom(), right(), and topLeft().
bool QItemSelectionRange::contains(const QModelIndex &index) const
Returns true if the model item specified by the index lies within the range of selected items; otherwise returns false.
bool QItemSelectionRange::contains(int row, int column, const QModelIndex &parentIndex) const
This is an overloaded function.
Returns true if the model item specified by (row, column) and with parentIndex as the parent item lies within the range of selected items; otherwise returns false.
int QItemSelectionRange::height() const
Returns the number of selected rows in the selection range.
QModelIndexList QItemSelectionRange::indexes() const
Returns the list of model index items stored in the selection.
QItemSelectionRange QItemSelectionRange::intersected(const QItemSelectionRange &other) const
Returns a new selection range containing only the items that are found in both the selection range and the other selection range.
This function was introduced in Qt 4.2.
bool QItemSelectionRange::intersects(const QItemSelectionRange &other) const
Returns true if this selection range intersects (overlaps with) the other range given; otherwise returns false.
bool QItemSelectionRange::isEmpty() const
Returns true if the selection range contains no selectable item
This function was introduced in Qt 4.7.
bool QItemSelectionRange::isValid() const
Returns true if the selection range is valid; otherwise returns false.
int QItemSelectionRange::left() const
Returns the column index corresponding to the leftmost selected column in the selection range.
const QAbstractItemModel *QItemSelectionRange::model() const
Returns the model that the items in the selection range belong to.
QModelIndex QItemSelectionRange::parent() const
Returns the parent model item index of the items in the selection range.
int QItemSelectionRange::right() const
Returns the column index corresponding to the rightmost selected column in the selection range.
void QItemSelectionRange::swap(QItemSelectionRange &other)
Swaps this selection range's contents with other. This function is very fast and never fails.
This function was introduced in Qt 5.6.
int QItemSelectionRange::top() const
Returns the row index corresponding to the uppermost selected row in the selection range.
const QPersistentModelIndex &QItemSelectionRange::topLeft() const
Returns the index for the item located at the top-left corner of the selection range.
See also top(), left(), and bottomRight().
int QItemSelectionRange::width() const
Returns the number of selected columns in the selection range.
bool QItemSelectionRange::operator!=(const QItemSelectionRange &other) const
Returns true if the selection range differs from the other range given; otherwise returns false.
bool QItemSelectionRange::operator<(const QItemSelectionRange &other) const
Returns true if the selection range is less than the other range given; otherwise returns false.
The less than calculation is not directly useful to developers - the way that ranges with different parents compare is not defined. This operator only exists so that the class can be used with QMap.
bool QItemSelectionRange::operator==(const QItemSelectionRange &other) const
Returns true if the selection range is exactly the same as the other range given; otherwise returns false.
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