Internally, the FXML loader uses an instance of .BeanAdapter to wrap an instantiated object and invoke its setter methods. Builders are discussed in more detail later. Property attributes are discussed in a later section.Ĭlasses that don't conform to Bean conventions can also be constructed in FXML, using an object called a "builder". Property elements are discussed in more detail later in this section. Properties can also be set using nested property elements. Note that the Label’s "text" property in this example is set using an XML attribute. The following is a simple but complete example that creates an instance of and sets its "text" property to "Hello, World!": This PI imports all classes from the package into the current namespace:Īny class that adheres to JavaBean constructor and property naming conventions can be readily instantiated and configured using FXML. For example, the following PI imports the class into the current FXML document’s namespace: Importing a class is done using the "import" processing instruction (PI). When the FXML loader (also introduced later) encounters such an element, it creates an instance of that class. If an element's tag is considered an instance declaration if the tag begins with uppercase letter (and the class is imported) or, as in Java, it denotes a fully-qualified (including the package name) name of a class. Other ways of creating class instances include referencing existing values, copying existing values, and including external FXML files. The most common is via instance declaration elements, which simply create a new instance of a class by name. Class Instance ElementsĬlass instances can be constructed in FXML in several ways. Scripting is discussed in a later section. In FXML, an XML element represents one of the following:Ĭlass instances, instance properties, static properties, and define blocks are discussed in this section below. This document introduces the FXML markup language and explains how it can be used to simplify development of JavaFX applications. It provides a convenient alternative to constructing such graphs in procedural code, and is ideally suited to defining the user interface of a JavaFX application, since the hierarchical structure of an XML document closely parallels the structure of the JavaFX scene graph. Special handlers for collections and propertiesįXML is a scriptable, XML-based markup language for constructing Java object graphs.
0 Comments
Leave a Reply. |