import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Stage;
import javafx.geometry.HPos;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import java.text.DecimalFormat;

//class TempConversionfx3
//15 Nov 2017
//
public class TempConversionfx3 extends Application
{
	private Label lblTemp = new Label(" Enter Temperature ");
	private Label lblAnswer = new Label(" ???  ");
	private TextField tfTemp = new TextField();
	private TextField tfAnswer = new TextField();
	private Button btCelsius = new Button("Calculate Celsius");
	private Button btFahren = new Button("Calculate Fahreheit");
	//
	@Override
	public void start(Stage primaryStage)
	{
		GridPane pane = new GridPane();
		pane.setAlignment(Pos.CENTER);
		pane.setGridLinesVisible(false);
		pane.setPadding(new Insets(15, 15, 15, 15));
		pane.setHgap(10);
		pane.setVgap(10);
		//
		pane.add(lblTemp, 0, 0);
		pane.add(tfTemp, 1, 0);
		pane.add(lblAnswer, 0, 1);
		pane.add(tfAnswer, 1, 1);
		pane.add(btFahren, 0, 2);
		pane.add(btCelsius, 1, 2);
		//
		btFahren.setOnAction(e -> calculateFahrenheit());
		btCelsius.setOnAction(e -> calculateCelsius());
		//
		//
		GridPane.setHalignment(btFahren, HPos.LEFT);
		GridPane.setHalignment(btCelsius, HPos.RIGHT);
		//
				tfTemp.setEditable(true);
				tfAnswer.setEditable(true);

		//
		Scene scene = new Scene(pane);
		primaryStage.setTitle("Fahrenheit & Celsius Converter");
		primaryStage.setScene(scene);
		primaryStage.show();
	}//end start
	//
	private void calculateCelsius()
	{
		DecimalFormat fmt = new DecimalFormat("0.##");
		//
		String strInput = tfTemp.getText();
		double fahren = Double.parseDouble(strInput);
		double celsius = (fahren - 32) / 1.8;
		lblAnswer.setText(" Celsius is ");
		tfAnswer.setText(fmt.format(celsius));
	}//end calculateCelsius
	//
	private void calculateFahrenheit()
	{
		DecimalFormat fmt = new DecimalFormat("0.##");
		//
		String strInput = tfTemp.getText();
		double celsius = Double.parseDouble(strInput);
		double fahren = (celsius * 1.8) + 32;
		lblAnswer.setText("Fahrenheit is ");
		tfAnswer.setText(fmt.format(fahren));
	}//end claculateFahreneheit

	//
	public static void main(String[] args)
	{
		Application.launch(args);
	}//end main
}//end class