ObjectModel QML Type
Defines a set of items to be used as a model 更多...
| Import Statement: | import QtQml.Models 2.2 |
属性
- count : int
Attached Properties
- index : int
方法
- void append(object item)
- void clear()
- object get(int index)
- void insert(int index, object item)
- void move(int from, int to, int n)
- void remove(int index, int n)
详细描述
An ObjectModel contains the visual items to be used in a view. When an ObjectModel is used in a view, the view does not require a delegate since the ObjectModel already contains the visual delegate (items).
An item can determine its index within the model via the index attached property.
The example below places three colored rectangles in a ListView.
import QtQuick 2.0 import QtQml.Models 2.1 Rectangle { ObjectModel { id: itemModel Rectangle { height: 30; width: 80; color: "red" } Rectangle { height: 30; width: 80; color: "green" } Rectangle { height: 30; width: 80; color: "blue" } } ListView { anchors.fill: parent model: itemModel } }
属性
附加属性
This attached property holds the index of this delegate's item within the model.
It is attached to each instance of the delegate.
成员
Returns the item at index in the model. This allows the item to be accessed or modified from JavaScript:
Component.onCompleted: { objectModel.append(objectComponent.createObject()) console.log(objectModel.get(0).objectName); objectModel.get(0).objectName = "first"; }
The index must be an element in the list.
This QML method was introduced in Qt 5.6.
参见 append().
Moves n items from one position to another.
The from and to ranges must exist; for example, to move the first 3 items to the end of the model:
objectModel.move(0, objectModel.count - 3, 3)
This QML method was introduced in Qt 5.6.
参见 append().