Introduction To Javafx

Introduction to JavaFX
Why JavaFX
 JavaFX is a new framework for developing Java GUI Programs

 Graphical functionality is provided by the library, no need to write your own
 Some Java History
 Ancient code: AWT
 Until Java 7: Swing (Will never die, most current application still use it)
 Java 8 and later: JavaFX
JavaFX Architecture
JavaFX API
 javafx.animation − Contains classes to add transition based animations such as fill,

fade, rotate, scale and translation, to the JavaFX nodes.
 javafx.application − Contains a set of classes responsible for the JavaFX application
life cycle.
 javafx.css − Contains classes to add CSS–like styling to JavaFX GUI applications.
 javafx.event − Contains classes and interfaces to deliver and handle JavaFX events.
 javafx.geometry − Contains classes to define 2D objects and perform operations on
them.
 javafx.stage − This package holds the top level container classes for JavaFX
application.
 javafx.scene − This package provides classes and interfaces to support the scene
graph.
Scene Graph
 A Scene Graph is the starting point of the construction of the GUI Application. It holds
the (GUI) application primitives that are termed as nodes.
 Geometrical (Graphical) objects − (2D and 3D) such as circle, rectangle, polygon, etc.
 UI controls − such as Button, Checkbox, Choice box, Text Area, etc.
 Containers − (layout panes) such as Border Pane, Grid Pane, Flow Pane, etc.
 Media elements − such as audio, video and image objects.
Prism
 Prism is a high performance hardware–accelerated graphical pipeline that is used to
render the graphics in JavaFX. It can render both 2-D and 3-D graphics.
GWT (Glass Windowing Toolkit)
 As the name suggests, GWT provides services to manage Windows, Timers, Surfaces
and Event Queues. GWT connects the JavaFX Platform to the Native Operating
System.
Quantum Toolkit
 It is an abstraction over the low-level components of Prism, Glass, Media Engine, and
Web Engine. It ties Prism and GWT together and makes them available to JavaFX.
WebView
 Using JavaFX, you can also embed HTML content in to a scene graph. WebView is the
component of JavaFX which is used to process this content.
Media Engine
 The JavaFX media engine is based on an open-source engine known as a Streamer.
This media engine supports the playback of video and audio content.
JavaFX Application Structure
 Stage
 A stage (a window) contains all the objects of a JavaFX application.
 It is represented by Stage class of the package javafx.stage.
 The primary stage is created by the platform itself.
 The created stage object is passed as an argument to the start() method of
the Application class.
 You have to call the show() method to display the contents of a stage.
 Scene
 A scene represents the physical contents of a JavaFX application.
 It contains all the contents of a scene graph.
 The class Scene of the package javafx.scene represents the scene object.
 At an instance, the scene object is added to only one stage.
 Scene Graph and Nodes
 A scene graph is a tree-like data structure (hierarchical) representing the contents of a
scene.
 In contrast, a node is a visual/graphical object of a scene graph.
package application;
rect.setX(20);
import javafx.application.Application;
rect.setY(20);
import javafx.scene.Group;
rect.setWidth(100);
import javafx.scene.Scene;
rect.setHeight(100);
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
rect.setArcHeight(35);
import javafx.stage.Stage;
rect.setArcWidth(35);
public class Shape_Example extends Application{
rect.setFill(Color.RED);

group.getChildren().addAll(rect);
@Override
Scene scene = new Scene(group,200,300,Color.GRAY);
public void start(Stage primaryStage) throws Exception {
primaryStage.setScene(scene);
// TODO Auto-generated method stub primaryStage.show();
primaryStage.setTitle("Rectangle Example"); }
Group group = new Group(); public static void main(String[] args) {
Rectangle rect=new Rectangle(); launch(args);
}

}
JavaFX HelloWorld Example
//import javafx.scene.control.Button, not java.awt.Button!!!!!
public class HelloWorld extends Application {
public static void main(String[] args) {
launch(args);
}
// Override the start method in the Application class
@Override
public void start(Stage primaryStage) {
// Create a scene and place a button in the scene
Button btOK = new Button("OK");
Scene scene = new Scene(btOK, 200, 250);
primaryStage.setTitle("MyJavaFX"); // Set the stage title
primaryStage.setScene(scene); // Place the scene
primaryStage.show();
}
}
package application;
import javafx.application.Application;
RadioButton button3 = new RadioButton("option 3");
import javafx.scene.Scene; RadioButton button4 = new RadioButton("option 4");
import javafx.scene.control.RadioButton; }
}
import javafx.scene.control.ToggleGroup;

import javafx.scene.layout.VBox;
button1.setToggleGroup(group);
import javafx.stage.Stage;
public class RadioButtonTest extends Application {
launch(args);
VBox root=new VBox();
}
root.setSpacing(10);
@Override
root.getChildren().addAll(button1,button2,button3,butt
public void start(Stage primaryStage) throws Exception {
on4);
// TODO Auto-generated method stub Scene scene=new Scene(root,400,300);
ToggleGroup group = new ToggleGroup(); primaryStage.setScene(scene);
RadioButton button1 = new RadioButton("option 1"); primaryStage.setTitle("Radio Button Example");
RadioButton button2 = new RadioButton("option 2"); primaryStage.show();
}
}
package application; //Handling KeyEvent for textfield 1
import javafx.application.Application; tf1.setOnKeyPressed(new EventHandler<KeyEvent>()
import javafx.event.EventHandler; {
import javafx.scene.Group; @Override
import javafx.scene.Scene; public void handle(KeyEvent key) {
import javafx.scene.control.TextField; // TODO Auto-generated method stub
import javafx.scene.input.KeyEvent; tf2.setText("Key Pressed :"+" "+key.getText());
import javafx.scene.paint.Color; }
import javafx.stage.Stage; });
public class JavaFX_KeyEvent extends Application{ //setting group and scene
@Override Group root = new Group();
public void start(Stage primaryStage) throws Exception { root.getChildren().addAll(tf2,tf1);
// TODO Auto-generated method stub Scene scene = new Scene(root,500,200,Color.WHEAT)
;
//Creating TextFields and setting position for them
primaryStage.setScene(scene);
TextField tf1 = new TextField();
primaryStage.setTitle("Handling KeyEvent");
TextField tf2 = new TextField();
primaryStage.show();
tf1.setTranslateX(100);
}
tf1.setTranslateY(100);
tf2.setTranslateX(300);
launch(args); } }
tf2.setTranslateY(100);
}
Layout Panes
JavaFX provides many types of panes for organizing
nodes in a container.
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Introduction to JavaFX

 JavaFX is a new framework for developing Java GUI Programs

 javafx.animation − Contains classes to add transition based animations such as fill,

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