grid

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 */
package registration;

import javafx.geometry.Pos;
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.PasswordField;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.text.Text;
import javafx.stage.Stage;

/**
 *
 * @author PC
 */

public class Registration extends Application {

    boolean usernameSet;
    boolean pwSet;
    boolean emailSet;

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Registration");
        GridPane grid = new GridPane();
        grid.setAlignment(Pos.CENTER);
        grid.setHgap(10);
        grid.setVgap(5);

        Text scenetitle = new Text("create your account");
        scenetitle.setId("create-text");
        grid.add(scenetitle, 0, 0, 2, 1);

        Label userNameLabel = new Label("USERNAME");
        userNameLabel.setId("user-text");
        grid.add(userNameLabel, 0, 1);

        TextField userName = new TextField();
        userName.setId("userName");
        grid.add(userName, 0, 2);

        Label emailLabel = new Label("E-MAIL ADDRESS");
        emailLabel.setId("email-text");
        grid.add(emailLabel, 0, 3);

        TextField email = new TextField();
        userName.setId("email");
        grid.add(email, 0, 4);

        Label pwLabel = new Label("PASSWORD");
        pwLabel.setId("pw-text");
        grid.add(pwLabel, 0, 5);

        PasswordField password = new PasswordField();
        password.setId("password");
        grid.add(password, 0, 6);

        Button btn = new Button("Sign Up");
        btn.setId("button");
        btn.setDisable(true);
        HBox hbBtn = new HBox(10);
        hbBtn.setAlignment(Pos.BOTTOM_LEFT);
        hbBtn.getChildren().add(btn);
        grid.add(hbBtn, 0, 7);

        final Text actiontarget = new Text();
        grid.add(actiontarget, 1, 6);
        actiontarget.setId("actiontarget");



        btn.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent e) {
                System.out.print(String.format("%s, %s, %s", userName.getText(), email.getText(), password.getText()));
            }
        });

        Text downunder = new Text("By clicking 'Sign Up' above, you confirm that you");
        Text downunder2 = new Text("accept Terms of Use.");
        grid.add(downunder, 0, 8,2,1);
        grid.add(downunder2, 0, 9,2,1);
        downunder.setId("downunder");
        downunder2.setId("downunder");

        userName.textProperty().addListener(new ChangeListener<String>() {
            @Override
            public void changed(final ObservableValue<? extends String> observable, final String oldValue, final String newValue) {
                if(userName.getText().length() >= 5)
                    usernameSet = true;
                if(userName.getText().length() < 5)
                    usernameSet = false;

                if(usernameSet && pwSet && emailSet)
                    btn.setDisable(false);

                if(!usernameSet || !pwSet || !emailSet)
                    btn.setDisable(true);
            }
        });

        password.textProperty().addListener(new ChangeListener<String>() {
            @Override
            public void changed(final ObservableValue<? extends String> observable, final String oldValue, final String newValue) {
                if(password.getText().matches("^.*[a-zA-Z].*$") && password.getText().matches("^.*[^\\w\\d\\s].*$") && password.getText().matches("^.*\\d.*$"))
                    pwSet = true;
                else
                    pwSet = false;

                if(usernameSet && pwSet && emailSet)
                    btn.setDisable(false);
                if(!usernameSet || !pwSet || !emailSet)
                    btn.setDisable(true);

            }
        });

        email.textProperty().addListener(new ChangeListener<String>() {
            @Override
            public void changed(final ObservableValue<? extends String> observable, final String oldValue, final String newValue) {
                if(email.getText().length() >= 6 && email.getText().matches("^[^@]*@[^@]*\\.[^@]*$"))
                    emailSet = true;
                else
                    emailSet = false;

                if(usernameSet && pwSet && emailSet)
                    btn.setDisable(false);
                if(!usernameSet || !pwSet || !emailSet)
                    btn.setDisable(true);

            }
        });

        Scene scene = new Scene(grid, 300, 275);
        primaryStage.setScene(scene);
        scene.getStylesheets().add
        (Registration.class.getResource("Registration.css").toExternalForm());
        primaryStage.show();
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }

}