The model index of the current row in the tree view.

This property defines a delegate to draw a specific cell.

In the item delegate you have access to the following special properties:

• styleData.selected - if the item is currently selected
• styleData.value - the value or text for this item
• styleData.textColor - the default text color for an item
• styleData.row - the index of the view row
• styleData.column - the index of the view column
• styleData.elideMode - the elide mode of the column
• styleData.textAlignment - the horizontal text alignment of the column
• styleData.pressed - true when the item is pressed
• styleData.hasActiveFocus - true when the row has focus
• styleData.index - the QModelIndex of the current item in the model
• styleData.depth - the depth of the current item in the model
• styleData.isExpanded - true when the item is expanded
• styleData.hasChildren - true if the model index of the current item has or can have children
• styleData.hasSibling - true if the model index of the current item has a sibling

Example:

itemDelegate: Item {
    Text {
        anchors.verticalCenter: parent.verticalCenter
        color: styleData.textColor
        elide: styleData.elideMode
        text: styleData.value
    }
}

Note: For performance reasons, created delegates can be recycled across multiple table rows. This implies that when you make use of implicit properties such as styleData.row or model, these values can change after the delegate has been constructed. This means that you should not assume that content is fixed when Component.onCompleted is called, but instead rely on bindings to such properties.

This property holds the model providing data for the tree view.

The model provides the set of data that is displayed by the view. The TreeView accept models derived from the QAbstractItemModel class.

The model index of the root item in the tree view. The root item is the parent item to the view's top-level items. Only items descending from the root item will be visible in the view.

Its default value is an invalid QModelIndex, which means the whole model data is shown by the tree view (assigning undefined to this proprety resets it to its default value.)

This property was introduced in QtQuick.Controls 1.5.

These properties determine the section labels.

See also ListView.section.

By default the selection model is null and only single selection is supported.

To use a different selection mode as described in selectionMode, an ItemSelectionModel must by set to the selection.

For example:

TreeView {
   model: myModel
   selection: ItemSelectionModel {
        model: myModel
   }
   TableViewColumn {
       role: "name"
       title: "Name
   }
}

See also selectionMode.

Emitted when the user activates a row in the tree by mouse or keyboard interaction. Mouse activation is triggered by single- or double-clicking, depending on the platform.

index is the model index of the activated row in the tree.

Note: This signal is only emitted for mouse interaction that is not blocked in the row or item delegate.

The corresponding handler is onActivated.

Emitted when the user clicks a valid row in the tree by single clicking

index is the model index of the clicked row in the tree.

Note: This signal is only emitted if the row or item delegate does not accept mouse events.

The corresponding handler is onClicked.

Emitted when a valid row in the tree is collapsed, hiding its children.

index is the model index of the collapsed row in the tree.

Note: This signal is only emitted if the row or item delegate does not accept mouse events.

The corresponding handler is onCollapsed.

Emitted when the user double clicks a valid row.

index is the model index of the double clicked row in the tree.

Note: This signal is only emitted if the row or item delegate does not accept mouse events.

The corresponding handler is onDoubleClicked.

Emitted when a valid row in the tree is expanded, displaying its children.

index is the model index of the expanded row in the tree.

Note: This signal is only emitted if the row or item delegate does not accept mouse events.

The corresponding handler is onExpanded.

Emitted when the user presses and holds a valid row in the tree.

index is the model index of the pressed row in the tree.

Note: This signal is only emitted if the row or item delegate does not accept mouse events.

The corresponding handler is onPressAndHold.

Collapses the model item specified by the index.

See also collapsed and isExpanded.

Expands the model item specified by the index.

See also expanded and isExpanded.

Returns the model index of the visible row at the point x, y in content coordinates. If there is no visible row at the point specified, an invalid QModelIndex is returned.

Note: This method should only be called after the component has completed.

Returns true if the model item index is expanded; otherwise returns false.

See also expanded and expand.