Question

13.2 State whether each of the following is true or false. If false, explain why: a) In general, a node's size should be defined explicitly. b) A node's position should be defined relative to its parent node and the other nodes in its parent. c) Most JavaFX layout panes use fixed positioning d) RadioButtons function as mutually exclusive options. e) Layout panes are container nodes that arrange their child nodes in a scene graph relative to one another, based on their sizes and positions. f) Togglegroup method get Toggle returns the Toggle that's currently selected. g) Each layout pane has a getChildren method that returns an Observablelist<Node> col- lection containing the layout's child nodes. h) The only way to respond to a property change is via a property binding, which enables a property of one object to be updated when a property of another object changes. i) JavaFX properties are observable when a property's value changes, other objects can respond accordingly. i) Property bindings are limited to JavaFX controls. k) In the RGBA color system, every color is represented by its red, green and blue color values, each ranging from 0 to 255, where 0 denotes no color and 255 full color. The alpha value (A)- which ranges from 0.0 to 1.0—represents a color's opacity, with 0.0 being completely transparent and 1.0 completely opaque. 1) To respond to ListView selection changes, you register a listener for the SingleSelec- tionModel's selected Item property. m) To create a custom ListView cell format, you must first define a subclass of the Cell Format generic class (package javafx.scene.control) that specifies how to create a ListView cell. n) You can build JavaFX GUIs only by using Scene Builder. o) JavaFX's TableView control (package javafx.scene.control) displays tabular data in rows and columns, and supports user interactions with that data. p) You can add Labels to a GUI that describe other controls. In such cases, you should set cach Label's describesControl property to the specific control the Label describes.

QUESTION G ONWARDS

Answer 1

Answer g:

True ,

the getchildren method return an Nodes that contain observable list .

Answer h:

True ,

property binding is a primary way to resopond the property changes which  also enables property of one object

to be updated when an property of another object changes.

Answer i:

True,

JavaFX properties are observable when a property's value changes, other objects can respond accordingly.

Answer j:

false,

JavaFX does not support thread-safe property-binding. Probably the reason it does not support thread-safe property binding is because it does not need to.

Answer k:

false,

it is the alpha component of a color. and it is in the range of 0 to 255 where 0 means fully transparent and 255 means fully opaque.

Answer n:

false,

because it can also be build by using FXML also.

Answer o:

true

Answer p:

True