Qt5 Virtual Slot

The QItemSelectionModel class keeps track of a view's selected items. More..

1. Qt Virtual Slot
2. Qt5 Virtual Slots

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Public Types

Properties

• selectedIndexes : const QModelIndexList

• 1 property inherited from QObject

Public Functions

• 32 public functions inherited from QObject

Public Slots

• 1 public slot inherited from QObject

Signals

• 2 signals inherited from QObject

Protected Functions

• 9 protected functions inherited from QObject

Additional Inherited Members

• 11 static public members inherited from QObject

Detailed Description

The QItemSelectionModel class keeps track of a view's selected items.

A QItemSelectionModel keeps track of the selected items in a view, or in several views onto the same model. It also keeps track of the currently selected item in a view.

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

The selected items are stored using ranges. Whenever you want to modify the selected items use select() and provide either a QItemSelection, or a QModelIndex and a QItemSelectionModel::SelectionFlag.

The QItemSelectionModel takes a two layer approach to selection management, dealing with both selected items that have been committed and items that are part of the current selection. The current selected items are part of the current interactive selection (for example with rubber-band selection or keyboard-shift selections).

To update the currently selected items, use the bitwise OR of QItemSelectionModel::Current and any of the other SelectionFlags. If you omit the QItemSelectionModel::Current command, a new current selection will be created, and the previous one added to the whole selection. All functions operate on both layers; for example, selecteditems() will return items from both layers.

Note: Since 5.5, model, hasSelection, and currentIndex are meta-object properties.

See also Model/View Programming, QAbstractItemModel, and Chart Example.

Member Type Documentation

enum QItemSelectionModel::SelectionFlag
flags QItemSelectionModel::SelectionFlags

This enum describes the way the selection model will be updated.

The SelectionFlags type is a typedef for QFlags. It stores an OR combination of SelectionFlag values.

Property Documentation

selectedIndexes : const QModelIndexList

This property was introduced in Qt 5.5.

Access functions:

Notifier signal:

Member Function Documentation

QItemSelectionModel::QItemSelectionModel(QAbstractItemModel *model = Q_NULLPTR)

Constructs a selection model that operates on the specified item model.

QItemSelectionModel::QItemSelectionModel(QAbstractItemModel *model, QObject *parent)

Constructs a selection model that operates on the specified item model with parent.

[virtual] QItemSelectionModel::~QItemSelectionModel()

Destroys the selection model.

[virtual slot] void QItemSelectionModel::clear()

Clears the selection model. Emits selectionChanged() and currentChanged().

[virtual slot] void QItemSelectionModel::clearCurrentIndex()

Clears the current index. Emits currentChanged().

[slot] void QItemSelectionModel::clearSelection()

Clears the selection in the selection model. Emits selectionChanged().

This function was introduced in Qt 4.2.

bool QItemSelectionModel::columnIntersectsSelection(intcolumn, const QModelIndex &parent) const

Returns true if there are any items selected in the column with the given parent.

[signal] void QItemSelectionModel::currentChanged(const QModelIndex &current, const QModelIndex &previous)

This signal is emitted whenever the current item changes. The previous model item index is replaced by the current index as the selection's current item.

Note that this signal will not be emitted when the item model is reset.

See also currentIndex(), setCurrentIndex(), and selectionChanged().

[signal] void QItemSelectionModel::currentColumnChanged(const QModelIndex &current, const QModelIndex &previous)

This signal is emitted if the current item changes and its column is different to the column of the previous current item.

Note that this signal will not be emitted when the item model is reset.

See also currentChanged(), currentRowChanged(), currentIndex(), and setCurrentIndex().

QModelIndex QItemSelectionModel::currentIndex() const

Returns the model item index for the current item, or an invalid index if there is no current item.

See also setCurrentIndex().

[signal] void QItemSelectionModel::currentRowChanged(const QModelIndex &current, const QModelIndex &previous)

This signal is emitted if the current item changes and its row is different to the row of the previous current item.

Note that this signal will not be emitted when the item model is reset.

See also currentChanged(), currentColumnChanged(), currentIndex(), and setCurrentIndex().

[protected] void QItemSelectionModel::emitSelectionChanged(const QItemSelection &newSelection, const QItemSelection &oldSelection)

Compares the two selections newSelection and oldSelection and emits selectionChanged() with the deselected and selected items.

bool QItemSelectionModel::hasSelection() const

Returns true if the selection model contains any selection ranges; otherwise returns false.

This function was introduced in Qt 4.2.

bool QItemSelectionModel::isColumnSelected(intcolumn, const QModelIndex &parent) const

Returns true if all items are selected in the column with the given parent.

Note that this function is usually faster than calling isSelected() on all items in the same column and that unselectable items are ignored.

bool QItemSelectionModel::isRowSelected(introw, const QModelIndex &parent) const

Returns true if all items are selected in the row with the given parent.

Note that this function is usually faster than calling isSelected() on all items in the same row and that unselectable items are ignored.

bool QItemSelectionModel::isSelected(const QModelIndex &index) const

Returns true if the given model item index is selected.

const QAbstractItemModel *QItemSelectionModel::model() const

Returns the item model operated on by the selection model.

See also setModel().

QAbstractItemModel *QItemSelectionModel::model()

Returns the item model operated on by the selection model.

This function was introduced in Qt 5.5.

[signal] void QItemSelectionModel::modelChanged(QAbstractItemModel *model)

This signal is emitted when the model is successfully set with setModel().

This function was introduced in Qt 5.5.

See also model() and setModel().

[virtual slot] void QItemSelectionModel::reset()

Clears the selection model. Does not emit any signals.

bool QItemSelectionModel::rowIntersectsSelection(introw, const QModelIndex &parent) const

Returns true if there are any items selected in the row with the given parent.

[virtual slot] void QItemSelectionModel::select(const QModelIndex &index, QItemSelectionModel::SelectionFlagscommand)

Selects the model item index using the specified command, and emits selectionChanged().

See also QItemSelectionModel::SelectionFlags.

[virtual slot] void QItemSelectionModel::select(const QItemSelection &selection, QItemSelectionModel::SelectionFlagscommand)

Selects the item selection using the specified command, and emits selectionChanged().

See also QItemSelectionModel::SelectionFlag.

QModelIndexList QItemSelectionModel::selectedColumns(introw = 0) const

Returns the indexes in the given row for columns where all rows are selected.

This function was introduced in Qt 4.2.

See also selectedIndexes() and selectedRows().

QModelIndexList QItemSelectionModel::selectedIndexes() const

Returns a list of all selected model item indexes. The list contains no duplicates, and is not sorted.

Note: Getter function for property selectedIndexes.

QModelIndexList QItemSelectionModel::selectedRows(intcolumn = 0) const

Returns the indexes in the given column for the rows where all columns are selected.

This function was introduced in Qt 4.2.

See also selectedIndexes() and selectedColumns().

const QItemSelection QItemSelectionModel::selection() const

Returns the selection ranges stored in the selection model.

[signal] void QItemSelectionModel::selectionChanged(const QItemSelection &selected, const QItemSelection &deselected)

This signal is emitted whenever the selection changes. The change in the selection is represented as an item selection of deselected items and an item selection of selected items.

Note the that the current index changes independently from the selection. Also note that this signal will not be emitted when the item model is reset.

Note: Notifier signal for property selectedIndexes.

See also select() and currentChanged().

[virtual slot] void QItemSelectionModel::setCurrentIndex(const QModelIndex &index, QItemSelectionModel::SelectionFlagscommand)

Sets the model item index to be the current item, and emits currentChanged(). The current item is used for keyboard navigation and focus indication; it is independent of any selected items, although a selected item can also be the current item.

Depending on the specified command, the index can also become part of the current selection.

See also currentIndex() and select().

void QItemSelectionModel::setModel(QAbstractItemModel *model)

Sets the model to model. The modelChanged() signal will be emitted.

This function was introduced in Qt 5.5.

See also model() and modelChanged().

© 2020 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.

Provides a styling interface for the Virtual Keyboard. More..

Properties

• alternateKeysListBackground : Component
• alternateKeysListBottomMargin : real
• alternateKeysListDelegate : Component
• alternateKeysListHighlight : Component
• alternateKeysListItemHeight : real
• alternateKeysListItemWidth : real
• alternateKeysListLeftMargin : real
• alternateKeysListRightMargin : real
• alternateKeysListTopMargin : real
• backspaceKeyPanel : Component
• characterPreviewDelegate : Component
• characterPreviewMargin : real
• enterKeyPanel : Component
• fullScreenInputBackground : Component
• fullScreenInputColor : color
• fullScreenInputContainerBackground : Component
• fullScreenInputCursor : Component
• fullScreenInputFont : font
• fullScreenInputMargins : real
• fullScreenInputPadding : real
• fullScreenInputPasswordCharacter : string
• fullScreenInputSelectedTextColor : color
• fullScreenInputSelectionColor : color
• handwritingKeyPanel : Component
• hideKeyPanel : Component
• keyPanel : Component
• keyboardBackground : Component
• keyboardDesignHeight : real
• keyboardDesignWidth : real
• keyboardHeight : real
• keyboardRelativeBottomMargin : real
• keyboardRelativeLeftMargin : real
• keyboardRelativeRightMargin : real
• keyboardRelativeTopMargin : real
• languageKeyPanel : Component
• languageListAdd : Transition
• languageListBackground : Component
• languageListDelegate : Component
• languageListHighlight : Component
• languageListRemove : Transition
• languagePopupListEnabled : bool
• modeKeyPanel : Component
• navigationHighlight : Component
• popupListAdd : Transition
• popupListBackground : Component
• popupListDelegate : Component
• popupListHighlight : Component
• popupListRemove : Transition
• scaleHint : real
• selectionHandle : Component
• selectionListAdd : Transition
• selectionListBackground : Component
• selectionListDelegate : Component
• selectionListHeight : real
• selectionListHighlight : Component
• selectionListRemove : Transition
• shiftKeyPanel : Component
• spaceKeyPanel : Component
• symbolKeyPanel : Component
• traceCanvasDelegate : Component
• traceInputKeyPanelDelegate : Component

Detailed Description

The style type provides the style definitions that are used by the InputPanel to decorate the virtual keyboard.

The design size specifies the aspect ratio of the virtual keyboard. Styles are scalable according to scaleHint, which is calculated from the keyboard's actual height and design height.

Property Documentation

Template for the alternative keys list background.

Bottom margin for the alternate keys list panel.

Template for the alternative keys list item.

Note: The delegate is used in a ListView.

Template for the alternative keys list highlight.

Note: The delegate is used as ListView.highlight.

Height of the alternate keys list item.

Width of the alternate keys list item.

Left margin for the alternate keys list panel.

Right margin for the alternate keys list panel.

Top margin for the alternate keys list panel.

Template for the backspace key.

Note: The delegate must be based on the KeyPanel type.

Template for the character preview popup.

If the delegate contains the text property, the property is updated with the display text when the component becomes active.

Example:

Number of pixels between the top of each key and the bottom of the characterPreviewDelegate.

Template for the enter key.

Note: The delegate must be based on the KeyPanel type.

This property holds the delegate for the background of the full screen input.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the text color for the full screen input field.

The default color is black.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the delegate for the background of the full screen input container.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the delegate for the cursor in the full screen input field.

The delegate should toggle the visibility of the cursor according to the parent.blinkStatus property defined for the full screen input field. For example:

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the font for the full screen input field.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the margins around the full screen input field.

The default value is 0.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the padding around the full screen input content.

The default value is 0.

Qt Virtual Slot

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the password mask character for the full screen input field.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the selected text color for the full screen input field.

The default color is set to fullScreenInputColor.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the selection color for the full screen input field.

The default color is semi-transparent black.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

Template for the handwriting mode key.

Note: The delegate must be based on the KeyPanel type.

Template for the hide key.

Note: The delegate must be based on the KeyPanel type.

Template for the regular keys.

Note: The delegate must be based on the KeyPanel type.

Example:

Template for the keyboard background.

Example:

The design height of the keyboard.

The design width of the keyboard.

The current height of the keyboard.

The distance between the bottom-most keys and the bottom edge of the keyboard container, expressed as a percentage (0.0 - 1.0) of the keyboard's height.

Qt5 Virtual Slots

The distance between the left-most keys and the left edge of the keyboard, expressed as a percentage (0.0 - 1.0) of the keyboard's width.

The distance between the right-most keys and the right edge of the keyboard, expressed as a percentage (0.0 - 1.0) of the keyboard's width.

This value is proportional to the keyboard's width.

The distance between the top-most keys and the top edge of the keyboard, expressed as a percentage (0.0 - 1.0) of the keyboard's height.

Template for the language key.

Note: The delegate must be based on the KeyPanel type.

Depending on the specified command, the index can also become part of the current selection.

See also currentIndex() and select().

void QItemSelectionModel::setModel(QAbstractItemModel *model)

Sets the model to model. The modelChanged() signal will be emitted.

This function was introduced in Qt 5.5.

See also model() and modelChanged().

© 2020 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.

Provides a styling interface for the Virtual Keyboard. More..

Properties

• alternateKeysListBackground : Component
• alternateKeysListBottomMargin : real
• alternateKeysListDelegate : Component
• alternateKeysListHighlight : Component
• alternateKeysListItemHeight : real
• alternateKeysListItemWidth : real
• alternateKeysListLeftMargin : real
• alternateKeysListRightMargin : real
• alternateKeysListTopMargin : real
• backspaceKeyPanel : Component
• characterPreviewDelegate : Component
• characterPreviewMargin : real
• enterKeyPanel : Component
• fullScreenInputBackground : Component
• fullScreenInputColor : color
• fullScreenInputContainerBackground : Component
• fullScreenInputCursor : Component
• fullScreenInputFont : font
• fullScreenInputMargins : real
• fullScreenInputPadding : real
• fullScreenInputPasswordCharacter : string
• fullScreenInputSelectedTextColor : color
• fullScreenInputSelectionColor : color
• handwritingKeyPanel : Component
• hideKeyPanel : Component
• keyPanel : Component
• keyboardBackground : Component
• keyboardDesignHeight : real
• keyboardDesignWidth : real
• keyboardHeight : real
• keyboardRelativeBottomMargin : real
• keyboardRelativeLeftMargin : real
• keyboardRelativeRightMargin : real
• keyboardRelativeTopMargin : real
• languageKeyPanel : Component
• languageListAdd : Transition
• languageListBackground : Component
• languageListDelegate : Component
• languageListHighlight : Component
• languageListRemove : Transition
• languagePopupListEnabled : bool
• modeKeyPanel : Component
• navigationHighlight : Component
• popupListAdd : Transition
• popupListBackground : Component
• popupListDelegate : Component
• popupListHighlight : Component
• popupListRemove : Transition
• scaleHint : real
• selectionHandle : Component
• selectionListAdd : Transition
• selectionListBackground : Component
• selectionListDelegate : Component
• selectionListHeight : real
• selectionListHighlight : Component
• selectionListRemove : Transition
• shiftKeyPanel : Component
• spaceKeyPanel : Component
• symbolKeyPanel : Component
• traceCanvasDelegate : Component
• traceInputKeyPanelDelegate : Component

Detailed Description

The style type provides the style definitions that are used by the InputPanel to decorate the virtual keyboard.

The design size specifies the aspect ratio of the virtual keyboard. Styles are scalable according to scaleHint, which is calculated from the keyboard's actual height and design height.

Property Documentation

Template for the alternative keys list background.

Bottom margin for the alternate keys list panel.

Template for the alternative keys list item.

Note: The delegate is used in a ListView.

Template for the alternative keys list highlight.

Note: The delegate is used as ListView.highlight.

Height of the alternate keys list item.

Width of the alternate keys list item.

Left margin for the alternate keys list panel.

Right margin for the alternate keys list panel.

Top margin for the alternate keys list panel.

Template for the backspace key.

Note: The delegate must be based on the KeyPanel type.

Template for the character preview popup.

If the delegate contains the text property, the property is updated with the display text when the component becomes active.

Example:

Number of pixels between the top of each key and the bottom of the characterPreviewDelegate.

Template for the enter key.

Note: The delegate must be based on the KeyPanel type.

This property holds the delegate for the background of the full screen input.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the text color for the full screen input field.

The default color is black.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the delegate for the background of the full screen input container.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the delegate for the cursor in the full screen input field.

The delegate should toggle the visibility of the cursor according to the parent.blinkStatus property defined for the full screen input field. For example:

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the font for the full screen input field.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the margins around the full screen input field.

The default value is 0.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the padding around the full screen input content.

The default value is 0.

Qt Virtual Slot

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the password mask character for the full screen input field.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the selected text color for the full screen input field.

The default color is set to fullScreenInputColor.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

This property holds the selection color for the full screen input field.

The default color is semi-transparent black.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.2.

Template for the handwriting mode key.

Note: The delegate must be based on the KeyPanel type.

Template for the hide key.

Note: The delegate must be based on the KeyPanel type.

Template for the regular keys.

Note: The delegate must be based on the KeyPanel type.

Example:

Template for the keyboard background.

Example:

The design height of the keyboard.

The design width of the keyboard.

The current height of the keyboard.

The distance between the bottom-most keys and the bottom edge of the keyboard container, expressed as a percentage (0.0 - 1.0) of the keyboard's height.

Qt5 Virtual Slots

The distance between the left-most keys and the left edge of the keyboard, expressed as a percentage (0.0 - 1.0) of the keyboard's width.

The distance between the right-most keys and the right edge of the keyboard, expressed as a percentage (0.0 - 1.0) of the keyboard's width.

This value is proportional to the keyboard's width.

The distance between the top-most keys and the top edge of the keyboard, expressed as a percentage (0.0 - 1.0) of the keyboard's height.

Template for the language key.

Note: The delegate must be based on the KeyPanel type.

This property holds the transition to apply to items that are added to the language list view.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

Template for the language list background.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

Template for the language list item.

Note: The delegate is used in a ListView.

Note: The delegate must be based on the SelectionListItem type.

The following properties are available to the item:

• display Display text for the current item.
• wordCompletionLength Word completion length measured from the end of the display text.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

Template for the language list highlight.

Note: The delegate is used as ListView.highlight.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

This property holds the transition to apply to items that are removed from the language list view.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

This property determines whether a popup list will be shown when the language key is clicked. If this property is false, clicking the language key cycles through the available languages one at a time.

The default value is false.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

Template for the generic mode key.

This template provides a visualization of the key in which the state can be on or off. This template is used in situations where the key label will remain the same regardless of status.

The current state is available in the control.mode property.

Note: The delegate must be based on the KeyPanel type.

Template for the navigation highlight item.

This item is used in arrow-key-navigation mode to highlight the navigation focus on the keyboard.

The item is typically a transparent rectangle with a high contrast border.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 1.1.

This property holds the transition to apply to items that are added to the popup list view.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

Template for the popup list background.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

Template for the popup list item.

Note: The delegate is used in a ListView.

Note: The delegate must be based on the SelectionListItem type.

The following properties are available to the item:

• display Display text for the current item.
• wordCompletionLength Word completion length measured from the end of the display text.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

Template for the popup list highlight.

Note: The delegate is used as ListView.highlight.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

This property holds the transition to apply to items that are removed from the popup list view.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

The keyboard style scale hint. This value is determined by dividing keyboardHeight by keyboardDesignHeight. All pixel dimensions must be proportional to this value.

This item is used to indicate where the bounds of the text selection is and to be able to interactively move the start or end of the selection. The same item is used for both start and end selection.

Selection handles are currently only supported for the application-based integration method.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

This property holds the transition to apply to items that are added to the selection list view.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 1.3.

Template for the selection list background.

Template for the selection list item.

Note: The delegate is used in a ListView.

Note: The delegate must be based on the SelectionListItem type.

The following properties are available to the item:

• display Display text for the current item.
• wordCompletionLength Word completion length measured from the end of the display text.

Selection list height.

Template for the selection list highlight.

Note: The delegate is used as ListView.highlight.

This property holds the transition to apply to items that are removed from the selection list view.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 1.3.

Template for the shift key.

Note: The delegate must be based on the KeyPanel type.

Template for the space key.

Note: The delegate must be based on the KeyPanel type.

Template for the symbol mode key.

Note: The delegate must be based on the KeyPanel type.

Template for rendering a Trace object.

Note: The delegate must be based on the TraceCanvas type.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

Template for the trace input key.

Note: The delegate must be based on the TraceInputKeyPanel type.

This QML property was introduced in QtQuick.VirtualKeyboard.Styles 2.1.

Poker graph software. © 2020 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.