Servis-Rhino 4211B Guia do Utilizador descarregar pdf (Página 262)

can access this list through the node's "getStyleClass()" method which returns an

ObservableList. We can add or remove class names from this list which will have the same

effect as adding or removing classes to be associated with the node.

To select a node within a scene graph we can use the following:

• .className – The name of a class that the node belongs to

• #idName – The CSS ID value of the node

A style may be explicit set on a node using the node's "setStyle()" method. Otherwise the

style is taken from the default and next from any loaded style sheet and next from any explicitly set

style.

Stylesheets can be applied to any container. A stylesheet can be loaded in a scene through:

scene.getStylesheets().add(<fileName>);

Some of the more interesting styles:

• -fx-text-fill - Text color

See also:

• JavaFX CSS Reference Guide

JavaFX Dialogs

Imagine we wish to display a new dialog. First we will create the FXML of the new dialog in a

new file. Next we will create its controller. These are the same steps that we would use to create

any new Scene.

In the application which wishes to show the dialog, we can now call:

Stage dialog = new Stage();

dialog.initStyle(StageStyle.UTILITY);

dialog.initModality(Modality.APPLICATION_MODAL);

dialog.setTitle("Error");

FXMLLoader loader = new FXMLLoader();

Parent root = (Parent)loader.load(getClass().getResource("ErrorDialog.fxml").openStream());

ErrorDialog_Controller edC = (ErrorDialog_Controller)loader.getController();

edC.setMessage(e.getMessage());

Scene scene = new Scene(root);

dialog.setScene(scene);

dialog.show();

From a high level, the story is that we create a new stage and set is style and modality. Next we

give it a title.

Now it is time to load its Scene graph. Once done, we can ask the loader for a handle to its

controller. We assume that the controller exposes a method to set the text on the dialog. Finally,

we can show the dialog.

Within the controller of the dialog, we may wish to provide a "close" button. It will be a button

with the following processing:

@FXML

private Button closeButton;

@FXML

void closeButtonAction(ActionEvent event){

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