A component provides a way of defining a new type that you can re-use in other QML files. A component is like a black box; it interacts with the outside world through properties, signals, and slots, and is generally defined in its own QML file. You can import components to screens and applications.
You can use the following QML elements to create components:
QML elements allow you to write cross-platform applications with custom look and feel. You can also use ready-made Qt Quick Components that enable you to create applications with a native look and feel for a particular target platform. You can install the components as part of the Qt 4 SDK.
When you use the Qt Creator project wizard to create Qt Quick applications, you can select which component set to use in your application.
Even if you use the Qt Quick Components, you can still write cross-platform applications, by using different sets of QML files for each platform.
Note: Components are listed in the QML Components section of the Library pane only if the filename begins with a capital letter.
The available properties depend on the item.
The following sections contain examples of how to create some common components:
Components can consist of several other components. To view the component hierarchy as a bread crumb path when you edit a component on the canvas, select Go into Component or press F2. Click the component names in the path to navigate to them. You can easily navigate back to the top level when you are done editing the component.