class QAbstractItemView

The QAbstractItemView class provides the basic functionality for item view classes. More

Inheritance diagram of PySide6.QtWidgets.QAbstractItemView

Inherited by: QTreeView, QTreeWidget, QHelpContentWidget, QTableView, QTableWidget, QListView, QUndoView, QListWidget, QHelpIndexWidget, QHeaderView, QColumnView

Synopsis

Properties

Methods

Virtual methods

Slots

Signals

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.

QAbstractItemView class is the base class for every standard view that uses a QAbstractItemModel. QAbstractItemView is an abstract class and cannot itself be instantiated. It provides a standard interface for interoperating with models through the signals and slots mechanism, enabling subclasses to be kept up-to-date with changes to their models. This class provides standard support for keyboard and mouse navigation, viewport scrolling, item editing, and selections. The keyboard navigation implements this functionality:

Keys

Functionality

Arrow keys

Changes the current item and selects it.

Ctrl+Arrow keys

Changes the current item but does not select it.

Shift+Arrow keys

Changes the current item and selects it. The previously selected item(s) is not deselected.

Ctrl+Space

Toggles selection of the current item.

Tab/Backtab

Changes the current item to the next/previous item.

Home/End

Selects the first/last item in the model.

Page up/Page down

Scrolls the rows shown up/down by the number of visible rows in the view.

Ctrl+A

Selects all items in the model.

Note that the above table assumes that the selection mode allows the operations. For instance, you cannot select items if the selection mode is NoSelection .

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

The view classes that inherit QAbstractItemView only need to implement their own view-specific functionality, such as drawing items, returning the geometry of items, finding items, etc.

QAbstractItemView provides common slots such as edit() and setCurrentIndex() . Many protected slots are also provided, including dataChanged() , rowsInserted() , rowsAboutToBeRemoved() , selectionChanged() , and currentChanged() .

The root item is returned by rootIndex() , and the current item by currentIndex() . To make sure that an item is visible use scrollTo() .

Some of QAbstractItemView ‘s functions are concerned with scrolling, for example setHorizontalScrollMode() and setVerticalScrollMode() . To set the range of the scroll bars, you can, for example, reimplement the view’s resizeEvent() function:

def resizeEvent(self, event):
    horizontalScrollBar().setRange(0, realWidth - width())
    ...

Note that the range is not updated until the widget is shown.

Several other functions are concerned with selection control; for example setSelectionMode() , and setSelectionBehavior() . This class provides a default selection model to work with ( selectionModel() ), but this can be replaced by using setSelectionModel() with an instance of QItemSelectionModel.

For complete control over the display and editing of items you can specify a delegate with setItemDelegate() .

QAbstractItemView provides a lot of protected functions. Some are concerned with editing, for example, edit() , and commitData() , whilst others are keyboard and mouse event handlers.

Note

If you inherit QAbstractItemView and intend to update the contents of the viewport, you should use viewport-> update() instead of update() as all painting operations take place on the viewport.

class SelectionMode

This enum indicates how the view responds to user selections:

Constant

Description

QAbstractItemView.SingleSelection

When the user selects an item, any already-selected item becomes unselected. It is possible for the user to deselect the selected item by pressing the Ctrl key when clicking the selected item.

QAbstractItemView.ContiguousSelection

When the user selects an item in the usual way, the selection is cleared and the new item selected. However, if the user presses the Shift key while clicking on an item, all items between the current item and the clicked item are selected or unselected, depending on the state of the clicked item.

QAbstractItemView.ExtendedSelection

When the user selects an item in the usual way, the selection is cleared and the new item selected. However, if the user presses the Ctrl key when clicking on an item, the clicked item gets toggled and all other items are left untouched. If the user presses the Shift key while clicking on an item, all items between the current item and the clicked item are selected or unselected, depending on the state of the clicked item. Multiple items can be selected by dragging the mouse over them.

QAbstractItemView.MultiSelection

When the user selects an item in the usual way, the selection status of that item is toggled and the other items are left alone. Multiple items can be toggled by dragging the mouse over them.

QAbstractItemView.NoSelection

Items cannot be selected.

The most commonly used modes are SingleSelection and ExtendedSelection.

class SelectionBehavior

Constant

Description

QAbstractItemView.SelectItems

Selecting single items.

QAbstractItemView.SelectRows

Selecting only rows.

QAbstractItemView.SelectColumns

Selecting only columns.

class ScrollHint

Constant

Description

QAbstractItemView.EnsureVisible

Scroll to ensure that the item is visible.

QAbstractItemView.PositionAtTop

Scroll to position the item at the top of the viewport.

QAbstractItemView.PositionAtBottom

Scroll to position the item at the bottom of the viewport.

QAbstractItemView.PositionAtCenter

Scroll to position the item at the center of the viewport.

class EditTrigger

(inherits enum.Flag) This enum describes actions which will initiate item editing.

Constant

Description

QAbstractItemView.NoEditTriggers

No editing possible.

QAbstractItemView.CurrentChanged

Editing start whenever current item changes.

QAbstractItemView.DoubleClicked

Editing starts when an item is double clicked.

QAbstractItemView.SelectedClicked

Editing starts when clicking on an already selected item.

QAbstractItemView.EditKeyPressed

Editing starts when the platform edit key has been pressed over an item.

QAbstractItemView.AnyKeyPressed

Editing starts when any key is pressed over an item.

QAbstractItemView.AllEditTriggers

Editing starts for all above actions.

class ScrollMode

Describes how the scrollbar should behave. When setting the scroll mode to ScrollPerPixel the single step size will adjust automatically unless it was set explicitly using setSingleStep() . The automatic adjustment can be restored by setting the single step size to -1.

Constant

Description

QAbstractItemView.ScrollPerItem

The view will scroll the contents one item at a time.

QAbstractItemView.ScrollPerPixel

The view will scroll the contents one pixel at a time.

class DragDropMode

Describes the various drag and drop events the view can act upon. By default the view does not support dragging or dropping (NoDragDrop).

Constant

Description

QAbstractItemView.NoDragDrop

Does not support dragging or dropping.

QAbstractItemView.DragOnly

The view supports dragging of its own items

QAbstractItemView.DropOnly

The view accepts drops

QAbstractItemView.DragDrop

The view supports both dragging and dropping

QAbstractItemView.InternalMove

The view accepts move (not copy) operations only from itself.

Note that the model used needs to provide support for drag and drop operations.

class CursorAction

This enum describes the different ways to navigate between items,

Constant

Description

QAbstractItemView.MoveUp

Move to the item above the current item.

QAbstractItemView.MoveDown

Move to the item below the current item.

QAbstractItemView.MoveLeft

Move to the item left of the current item.

QAbstractItemView.MoveRight

Move to the item right of the current item.

QAbstractItemView.MoveHome

Move to the top-left corner item.

QAbstractItemView.MoveEnd

Move to the bottom-right corner item.

QAbstractItemView.MovePageUp

Move one page up above the current item.

QAbstractItemView.MovePageDown

Move one page down below the current item.

QAbstractItemView.MoveNext

Move to the item after the current item.

QAbstractItemView.MovePrevious

Move to the item before the current item.

See also

moveCursor()

class State

Describes the different states the view can be in. This is usually only interesting when reimplementing your own view.

Constant

Description

QAbstractItemView.NoState

The is the default state.

QAbstractItemView.DraggingState

The user is dragging items.

QAbstractItemView.DragSelectingState

The user is selecting items.

QAbstractItemView.EditingState

The user is editing an item in a widget editor.

QAbstractItemView.ExpandingState

The user is opening a branch of items.

QAbstractItemView.CollapsingState

The user is closing a branch of items.

QAbstractItemView.AnimatingState

The item view is performing an animation.

class DropIndicatorPosition

This enum indicates the position of the drop indicator in relation to the index at the current mouse position:

Constant

Description

QAbstractItemView.OnItem

The item will be dropped on the index.

QAbstractItemView.AboveItem

The item will be dropped above the index.

QAbstractItemView.BelowItem

The item will be dropped below the index.

QAbstractItemView.OnViewport

The item will be dropped onto a region of the viewport with no items. The way each view handles items dropped onto the viewport depends on the behavior of the underlying model in use.

Note

Properties can be used directly when from __feature__ import true_property is used or via accessor functions otherwise.

property alternatingRowColorsᅟ: bool

This property holds whether to draw the background using alternating colors.

If this property is true, the item background will be drawn using QPalette::Base and QPalette::AlternateBase; otherwise the background will be drawn using the QPalette::Base color.

By default, this property is false.

Access functions:
property autoScrollᅟ: bool

This property holds whether autoscrolling in drag move events is enabled.

If this property is set to true (the default), the QAbstractItemView automatically scrolls the contents of the view if the user drags within 16 pixels of the viewport edge. If the current item changes, then the view will scroll automatically to ensure that the current item is fully visible.

This property only works if the viewport accepts drops. Autoscroll is switched off by setting this property to false.

Access functions:
property autoScrollMarginᅟ: int

This property holds the size of the area when auto scrolling is triggered.

This property controls the size of the area at the edge of the viewport that triggers autoscrolling. The default value is 16 pixels.

Access functions:
property defaultDropActionᅟ: Qt.DropAction

This property holds the drop action that will be used by default in QAbstractItemView::drag()..

If the property is not set, the drop action is CopyAction when the supported actions support CopyAction.

Access functions:
property dragDropModeᅟ: QAbstractItemView.DragDropMode

This property holds the drag and drop event the view will act upon.

Access functions:
property dragDropOverwriteModeᅟ: bool

This property holds the view’s drag and drop behavior.

If its value is true, the selected data will overwrite the existing item data when dropped, while moving the data will clear the item. If its value is false, the selected data will be inserted as a new item when the data is dropped. When the data is moved, the item is removed as well.

The default value is false, as in the QListView and QTreeView subclasses. In the QTableView subclass, on the other hand, the property has been set to true.

Note: This is not intended to prevent overwriting of items. The model’s implementation of flags() should do that by not returning Qt::ItemIsDropEnabled.

See also

dragDropMode

Access functions:
property dragEnabledᅟ: bool

This property holds whether the view supports dragging of its own items.

Access functions:
property editTriggersᅟ: Combination of QAbstractItemView.EditTrigger

This property holds which actions will initiate item editing.

This property is a selection of flags defined by EditTrigger , combined using the OR operator. The view will only initiate the editing of an item if the action performed is set in this property.

Access functions:
property horizontalScrollModeᅟ: QAbstractItemView.ScrollMode

This property holds how the view scrolls its contents in the horizontal direction.

This property controls how the view scroll its contents horizontally. Scrolling can be done either per pixel or per item. Its default value comes from the style via the SH_ItemView_ScrollMode style hint.

Access functions:
property iconSizeᅟ: QSize

This property holds the size of items’ icons.

Setting this property when the view is visible will cause the items to be laid out again.

Access functions:
property selectionBehaviorᅟ: QAbstractItemView.SelectionBehavior

This property holds which selection behavior the view uses.

This property holds whether selections are done in terms of single items, rows or columns.

Access functions:
property selectionModeᅟ: QAbstractItemView.SelectionMode

This property holds which selection mode the view operates in.

This property controls whether the user can select one or many items and, in many-item selections, whether the selection must be a continuous range of items.

Access functions:
property showDropIndicatorᅟ: bool

This property holds whether the drop indicator is shown when dragging items and dropping..

Access functions:
property tabKeyNavigationᅟ: bool

This property holds whether item navigation with tab and backtab is enabled..

Access functions:
property textElideModeᅟ: Qt.TextElideMode

This property holds the position of the “…” in elided text..

The default value for all item views is Qt::ElideRight.

Access functions:
property verticalScrollModeᅟ: QAbstractItemView.ScrollMode

This property holds how the view scrolls its contents in the vertical direction.

This property controls how the view scroll its contents vertically. Scrolling can be done either per pixel or per item. Its default value comes from the style via the SH_ItemView_ScrollMode style hint.

Access functions:
__init__([parent=None])
Parameters:

parentQWidget

Constructs an abstract item view with the given parent.

activated(index)
Parameters:

indexQModelIndex

This signal is emitted when the item specified by index is activated by the user. How to activate items depends on the platform; e.g., by single- or double-clicking the item, or by pressing the Return or Enter key when the item is current.

alternatingRowColors()
Return type:

bool

Getter of property alternatingRowColorsᅟ .

autoScrollMargin()
Return type:

int

Getter of property autoScrollMarginᅟ .

clearSelection()

Deselects all selected items. The current index will not be changed.

clicked(index)
Parameters:

indexQModelIndex

This signal is emitted when a mouse button is left-clicked. The item the mouse was clicked on is specified by index. The signal is only emitted when the index is valid.

closeEditor(editor, hint)
Parameters:

Closes the given editor, and releases it. The hint is used to specify how the view should respond to the end of the editing operation. For example, the hint may indicate that the next item in the view should be opened for editing.

See also

edit() commitData()

closePersistentEditor(index)
Parameters:

indexQModelIndex

Closes the persistent editor for the item at the given index.

commitData(editor)
Parameters:

editorQWidget

Commit the data in the editor to the model.

See also

closeEditor()

currentChanged(current, previous)
Parameters:

This slot is called when a new item becomes the current item. The previous current item is specified by the previous index, and the new item by the current index.

If you want to know about changes to items see the dataChanged() signal.

currentIndex()
Return type:

QModelIndex

Returns the model index of the current item.

dataChanged(topLeft, bottomRight[, roles=list()])
Parameters:

This slot is called when items with the given roles are changed in the model. The changed items are those from topLeft to bottomRight inclusive. If just one item is changed topLeft == bottomRight.

The roles which have been changed can either be an empty container (meaning everything has changed), or a non-empty container with the subset of roles which have changed.

Note

: Qt::ToolTipRole is not honored by dataChanged() in the views provided by Qt.

defaultDropAction()
Return type:

DropAction

Getter of property defaultDropActionᅟ .

dirtyRegionOffset()
Return type:

QPoint

Returns the offset of the dirty regions in the view.

If you use scrollDirtyRegion() and implement a paintEvent() in a subclass of QAbstractItemView , you should translate the area given by the paint event with the offset returned from this function.

doAutoScroll()
doItemsLayout()
doubleClicked(index)
Parameters:

indexQModelIndex

This signal is emitted when a mouse button is double-clicked. The item the mouse was double-clicked on is specified by index. The signal is only emitted when the index is valid.

dragDropMode()
Return type:

DragDropMode

Getter of property dragDropModeᅟ .

dragDropOverwriteMode()
Return type:

bool

Getter of property dragDropOverwriteModeᅟ .

dragEnabled()
Return type:

bool

See also

setDragEnabled()

Getter of property dragEnabledᅟ .

dropIndicatorPosition()
Return type:

DropIndicatorPosition

Returns the position of the drop indicator in relation to the closest item.

edit(index)
Parameters:

indexQModelIndex

Starts editing the item corresponding to the given index if it is editable.

Note that this function does not change the current index. Since the current index defines the next and previous items to edit, users may find that keyboard navigation does not work as expected. To provide consistent navigation behavior, call setCurrentIndex() before this function with the same model index.

See also

flags()

edit(index, trigger, event)
Parameters:
Return type:

bool

Starts editing the item at index, creating an editor if necessary, and returns true if the view’s State is now EditingState ; otherwise returns false.

The action that caused the editing process is described by trigger, and the associated event is specified by event.

Editing can be forced by specifying the trigger to be AllEditTriggers .

See also

closeEditor()

editTriggers()
Return type:

Combination of EditTrigger

Getter of property editTriggersᅟ .

editorDestroyed(editor)
Parameters:

editorQObject

This function is called when the given editor has been destroyed.

See also

closeEditor()

entered(index)
Parameters:

indexQModelIndex

This signal is emitted when the mouse cursor enters the item specified by index. Mouse tracking needs to be enabled for this feature to work.

executeDelayedItemsLayout()

Executes the scheduled layouts without waiting for the event processing to begin.

hasAutoScroll()
Return type:

bool

Getter of property autoScrollᅟ .

abstract horizontalOffset()
Return type:

int

Returns the horizontal offset of the view.

In the base class this is a pure virtual function.

See also

verticalOffset()

horizontalScrollMode()
Return type:

ScrollMode

Getter of property horizontalScrollModeᅟ .

horizontalScrollbarAction(action)
Parameters:

action – int

horizontalScrollbarValueChanged(value)
Parameters:

value – int

iconSize()
Return type:

QSize

See also

setIconSize()

Getter of property iconSizeᅟ .

iconSizeChanged(size)
Parameters:

sizeQSize

Notification signal of property iconSizeᅟ .

abstract indexAt(point)
Parameters:

pointQPoint

Return type:

QModelIndex

Returns the model index of the item at the viewport coordinates point.

In the base class this is a pure virtual function.

See also

visualRect()

indexWidget(index)
Parameters:

indexQModelIndex

Return type:

QWidget

Returns the widget for the item at the given index.

See also

setIndexWidget()

initViewItemOption(option)
Parameters:

optionQStyleOptionViewItem

Initialize the option structure with the view’s palette, font, state, alignments etc.

Note

Implementations of this methods should check the version of the structure received, populate all members the implementation is familiar with, and set the version member to the one supported by the implementation before returning.

abstract isIndexHidden(index)
Parameters:

indexQModelIndex

Return type:

bool

Returns true if the item referred to by the given index is hidden in the view, otherwise returns false.

Hiding is a view specific feature. For example in TableView a column can be marked as hidden or a row in the TreeView.

In the base class this is a pure virtual function.

isPersistentEditorOpen(index)
Parameters:

indexQModelIndex

Return type:

bool

Returns whether a persistent editor is open for the item at index index.

itemDelegate()
Return type:

QAbstractItemDelegate

Returns the item delegate used by this view and model. This is either one set with setItemDelegate() , or the default one.

itemDelegate(index)
Parameters:

indexQModelIndex

Return type:

QAbstractItemDelegate

Note

This function is deprecated.

Use itemDelegateForIndex() instead. Returns the item delegate used by this view and model for the given index.

itemDelegateForColumn(column)
Parameters:

column – int

Return type:

QAbstractItemDelegate

Returns the item delegate used by this view and model for the given column. You can call itemDelegate() to get a pointer to the current delegate for a given index.

itemDelegateForIndex(index)
Parameters:

indexQModelIndex

Return type:

QAbstractItemDelegate

Returns the item delegate used by this view and model for the given index.

itemDelegateForRow(row)
Parameters:

row – int

Return type:

QAbstractItemDelegate

Returns the item delegate used by this view and model for the given row, or None if no delegate has been assigned. You can call itemDelegate() to get a pointer to the current delegate for a given index.

keyboardSearch(search)
Parameters:

search – str

Moves to and selects the item best matching the string search. If no item is found nothing happens.

In the default implementation, the search is reset if search is empty, or the time interval since the last search has exceeded keyboardInputInterval() .

model()
Return type:

QAbstractItemModel

Returns the model that this view is presenting.

See also

setModel()

abstract moveCursor(cursorAction, modifiers)
Parameters:
Return type:

QModelIndex

Returns a QModelIndex object pointing to the next object in the view, based on the given cursorAction and keyboard modifiers specified by modifiers.

In the base class this is a pure virtual function.

openPersistentEditor(index)
Parameters:

indexQModelIndex

Opens a persistent editor on the item at the given index. If no editor exists, the delegate will create a new editor.

pressed(index)
Parameters:

indexQModelIndex

This signal is emitted when a mouse button is pressed. The item the mouse was pressed on is specified by index. The signal is only emitted when the index is valid.

Use the QGuiApplication::mouseButtons() function to get the state of the mouse buttons.

reset()

Reset the internal state of the view.

Warning

This function will reset open editors, scroll bar positions, selections, etc. Existing changes will not be committed. If you would like to save your changes when resetting the view, you can reimplement this function, commit your changes, and then call the superclass’ implementation.

resetHorizontalScrollMode()

Reset function of property horizontalScrollModeᅟ .

resetVerticalScrollMode()

Reset function of property verticalScrollModeᅟ .

rootIndex()
Return type:

QModelIndex

Returns the model index of the model’s root item. The root item is the parent item to the view’s toplevel items. The root can be invalid.

See also

setRootIndex()

rowsAboutToBeRemoved(parent, start, end)
Parameters:

This slot is called when rows are about to be removed. The deleted rows are those under the given parent from start to end inclusive.

See also

rowsInserted()

rowsInserted(parent, start, end)
Parameters:

This slot is called when rows are inserted. The new rows are those under the given parent from start to end inclusive. The base class implementation calls fetchMore() on the model to check for more data.

scheduleDelayedItemsLayout()

Schedules a layout of the items in the view to be executed when the event processing starts.

Even if scheduleDelayedItemsLayout() is called multiple times before events are processed, the view will only do the layout once.

scrollDirtyRegion(dx, dy)
Parameters:
  • dx – int

  • dy – int

Prepares the view for scrolling by (dx,``dy``) pixels by moving the dirty regions in the opposite direction. You only need to call this function if you are implementing a scrolling viewport in your view subclass.

If you implement scrollContentsBy() in a subclass of QAbstractItemView , call this function before you call scroll() on the viewport. Alternatively, just call update() .

abstract scrollTo(index[, hint=QAbstractItemView.ScrollHint.EnsureVisible])
Parameters:

Scrolls the view if necessary to ensure that the item at index is visible. The view will try to position the item according to the given hint.

In the base class this is a pure virtual function.

scrollToBottom()

Scrolls the view to the bottom.

scrollToTop()

Scrolls the view to the top.

selectAll()

Selects all items in the view. This function will use the selection behavior set on the view when selecting.

selectedIndexes()
Return type:

.list of QModelIndex

This convenience function returns a list of all selected and non-hidden item indexes in the view. The list contains no duplicates, and is not sorted.

selectionBehavior()
Return type:

SelectionBehavior

Getter of property selectionBehaviorᅟ .

selectionChanged(selected, deselected)
Parameters:

This slot is called when the selection is changed. The previous selection (which may be empty), is specified by deselected, and the new selection by selected.

See also

setSelection()

selectionCommand(index[, event=None])
Parameters:
Return type:

Combination of SelectionFlag

Returns the SelectionFlags to be used when updating a selection model for the specified index. The result depends on the current selectionMode() , and on the user input event event, which can be None.

Reimplement this function to define your own selection behavior.

See also

setSelection()

selectionMode()
Return type:

SelectionMode

Getter of property selectionModeᅟ .

selectionModel()
Return type:

QItemSelectionModel

Returns the current selection model.

setAlternatingRowColors(enable)
Parameters:

enable – bool

Setter of property alternatingRowColorsᅟ .

setAutoScroll(enable)
Parameters:

enable – bool

See also

hasAutoScroll()

Setter of property autoScrollᅟ .

setAutoScrollMargin(margin)
Parameters:

margin – int

Setter of property autoScrollMarginᅟ .

setCurrentIndex(index)
Parameters:

indexQModelIndex

Sets the current item to be the item at index.

Unless the current selection mode is NoSelection , the item is also selected. Note that this function also updates the starting position for any new selections the user performs.

To set an item as the current item without selecting it, call

selectionModel()->setCurrentIndex(index, QItemSelectionModel::NoUpdate);

setDefaultDropAction(dropAction)
Parameters:

dropActionDropAction

Setter of property defaultDropActionᅟ .

setDirtyRegion(region)
Parameters:

regionQRegion

Marks the given region as dirty and schedules it to be updated. You only need to call this function if you are implementing your own view subclass.

setDragDropMode(behavior)
Parameters:

behaviorDragDropMode

See also

dragDropMode()

Setter of property dragDropModeᅟ .

setDragDropOverwriteMode(overwrite)
Parameters:

overwrite – bool

Setter of property dragDropOverwriteModeᅟ .

setDragEnabled(enable)
Parameters:

enable – bool

See also

dragEnabled()

Setter of property dragEnabledᅟ .

setDropIndicatorShown(enable)
Parameters:

enable – bool

Setter of property showDropIndicatorᅟ .

setEditTriggers(triggers)
Parameters:

triggers – Combination of EditTrigger

See also

editTriggers()

Setter of property editTriggersᅟ .

setHorizontalScrollMode(mode)
Parameters:

modeScrollMode

Setter of property horizontalScrollModeᅟ .

setIconSize(size)
Parameters:

sizeQSize

See also

iconSize()

Setter of property iconSizeᅟ .

setIndexWidget(index, widget)
Parameters:

Warning

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

Sets the given widget on the item at the given index, passing the ownership of the widget to the viewport.

If index is invalid (e.g., if you pass the root index), this function will do nothing.

The given widget's autoFillBackground property must be set to true, otherwise the widget’s background will be transparent, showing both the model data and the item at the given index.

Note

The view takes ownership of the widget. This means if index widget A is replaced with index widget B, index widget A will be deleted. For example, in the code snippet below, the QLineEdit object will be deleted.

setIndexWidget(index, QLineEdit())
...
setIndexWidget(index, QTextEdit())

This function should only be used to display static content within the visible area corresponding to an item of data. If you want to display custom dynamic content or implement a custom editor widget, subclass QStyledItemDelegate instead.

setItemDelegate(delegate)
Parameters:

delegateQAbstractItemDelegate

Sets the item delegate for this view and its model to delegate. This is useful if you want complete control over the editing and display of items.

Any existing delegate will be removed, but not deleted. QAbstractItemView does not take ownership of delegate.

Warning

You should not share the same instance of a delegate between views. Doing so can cause incorrect or unintuitive editing behavior since each view connected to a given delegate may receive the closeEditor() signal, and attempt to access, modify or close an editor that has already been closed.

See also

itemDelegate()

setItemDelegateForColumn(column, delegate)
Parameters:

Sets the given item delegate used by this view and model for the given column. All items on column will be drawn and managed by delegate instead of using the default delegate (i.e., itemDelegate() ).

Any existing column delegate for column will be removed, but not deleted. QAbstractItemView does not take ownership of delegate.

Note

If a delegate has been assigned to both a row and a column, the row delegate will take precedence and manage the intersecting cell index.

Warning

You should not share the same instance of a delegate between views. Doing so can cause incorrect or unintuitive editing behavior since each view connected to a given delegate may receive the closeEditor() signal, and attempt to access, modify or close an editor that has already been closed.

setItemDelegateForRow(row, delegate)
Parameters:

Sets the given item delegate used by this view and model for the given row. All items on row will be drawn and managed by delegate instead of using the default delegate (i.e., itemDelegate() ).

Any existing row delegate for row will be removed, but not deleted. QAbstractItemView does not take ownership of delegate.

Note

If a delegate has been assigned to both a row and a column, the row delegate (i.e., this delegate) will take precedence and manage the intersecting cell index.

Warning

You should not share the same instance of a delegate between views. Doing so can cause incorrect or unintuitive editing behavior since each view connected to a given delegate may receive the closeEditor() signal, and attempt to access, modify or close an editor that has already been closed.

setModel(model)
Parameters:

modelQAbstractItemModel

Warning

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

Sets the model for the view to present.

This function will create and set a new selection model, replacing any model that was previously set with setSelectionModel() . However, the old selection model will not be deleted as it may be shared between several views. We recommend that you delete the old selection model if it is no longer required. This is done with the following code:

m = view.selectionModel()
view.setModel(model())
del m

If both the old model and the old selection model do not have parents, or if their parents are long-lived objects, it may be preferable to call their deleteLater() functions to explicitly delete them.

The view does not take ownership of the model unless it is the model’s parent object because the model may be shared between many different views.

setRootIndex(index)
Parameters:

indexQModelIndex

Sets the root item to the item at the given index.

See also

rootIndex()

abstract setSelection(rect, command)
Parameters:

Applies the selection flags to the items in or touched by the rectangle, rect.

When implementing your own itemview setSelection should call selectionModel() ->select(selection, flags) where selection is either an empty QModelIndex or a QItemSelection that contains all items that are contained in rect.

setSelectionBehavior(behavior)
Parameters:

behaviorSelectionBehavior

Setter of property selectionBehaviorᅟ .

setSelectionMode(mode)
Parameters:

modeSelectionMode

See also

selectionMode()

Setter of property selectionModeᅟ .

setSelectionModel(selectionModel)
Parameters:

selectionModelQItemSelectionModel

Sets the current selection model to the given selectionModel.

Note that, if you call setModel() after this function, the given selectionModel will be replaced by one created by the view.

Note

It is up to the application to delete the old selection model if it is no longer needed; i.e., if it is not being used by other views. This will happen automatically when its parent object is deleted. However, if it does not have a parent, or if the parent is a long-lived object, it may be preferable to call its deleteLater() function to explicitly delete it.

setState(state)
Parameters:

stateState

Sets the item view’s state to the given state.

See also

state()

setTabKeyNavigation(enable)
Parameters:

enable – bool

Setter of property tabKeyNavigationᅟ .

setTextElideMode(mode)
Parameters:

modeTextElideMode

See also

textElideMode()

Setter of property textElideModeᅟ .

setVerticalScrollMode(mode)
Parameters:

modeScrollMode

Setter of property verticalScrollModeᅟ .

showDropIndicator()
Return type:

bool

Getter of property showDropIndicatorᅟ .

sizeHintForColumn(column)
Parameters:

column – int

Return type:

int

Returns the width size hint for the specified column or -1 if there is no model.

This function is used in views with a horizontal header to find the size hint for a header section based on the contents of the given column.

See also

sizeHintForRow()

sizeHintForIndex(index)
Parameters:

indexQModelIndex

Return type:

QSize

Returns the size hint for the item with the specified index or an invalid size for invalid indexes.

sizeHintForRow(row)
Parameters:

row – int

Return type:

int

Returns the height size hint for the specified row or -1 if there is no model.

The returned height is calculated using the size hints of the given row's items, i.e. the returned value is the maximum height among the items. Note that to control the height of a row, you must reimplement the sizeHint() function.

This function is used in views with a vertical header to find the size hint for a header section based on the contents of the given row.

startAutoScroll()
startDrag(supportedActions)
Parameters:

supportedActions – Combination of DropAction

Starts a drag by calling drag->exec() using the given supportedActions.

state()
Return type:

State

Returns the item view’s state.

See also

setState()

stopAutoScroll()
tabKeyNavigation()
Return type:

bool

Getter of property tabKeyNavigationᅟ .

textElideMode()
Return type:

TextElideMode

Getter of property textElideModeᅟ .

update(index)
Parameters:

indexQModelIndex

Updates the area occupied by the given index.

updateEditorData()
updateEditorGeometries()
updateGeometries()

Updates the geometry of the child widgets of the view.

abstract verticalOffset()
Return type:

int

Returns the vertical offset of the view.

In the base class this is a pure virtual function.

verticalScrollMode()
Return type:

ScrollMode

Getter of property verticalScrollModeᅟ .

verticalScrollbarAction(action)
Parameters:

action – int

verticalScrollbarValueChanged(value)
Parameters:

value – int

viewportEntered()

This signal is emitted when the mouse cursor enters the viewport. Mouse tracking needs to be enabled for this feature to work.

See also

entered()

abstract visualRect(index)
Parameters:

indexQModelIndex

Return type:

QRect

Returns the rectangle on the viewport occupied by the item at index.

If your item is displayed in several areas then visualRect should return the primary area that contains index and not the complete area that index might encompasses, touch or cause drawing.

In the base class this is a pure virtual function.

abstract visualRegionForSelection(selection)
Parameters:

selectionQItemSelection

Return type:

QRegion

Returns the region from the viewport of the items in the given selection.

In the base class this is a pure virtual function.