'Styling and organizing nodes inside a scene
I want to do the following things:
Organize my JavaFX code's nodes
Increase the size of my combo boxes a little bit
Change the scene background's color.
My current code actually looks like this:
welcome message
small combo boxes
submit reset
result message
The result should be like this:
Welcome message
combo boxes
submit reset
result message
Here is my code:
package com.example.team9project;
import javafx.application.Application;
import javafx.css.Size;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundFill;
import javafx.scene.layout.GridPane;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.stage.Stage;
import java.util.ArrayList;
public class MagicSquare2 extends Application {
// user-friendly text entries for the matrix
// using combo boxes to allow user to choose or type their choice
ComboBox<String> [][] fields = new ComboBox[3][3];
// labels to display messages to the user
Label welcome = new Label();
Label result = new Label();
GridPane gridPane = new GridPane(); // the appropriate pane for a matrix
final int correctSum = 15; // helpful variable for isMagicSquare method
public void start(Stage primaryStage) {
Background red = new Background(new BackgroundFill(Color.RED, null, null));
Background blue = new Background(new BackgroundFill(Color.BLUE, null, null));
// creating buttons
Button submit = new Button("Submit");
submit.backgroundProperty().set(red);
submit.setTextFill(Color.WHITE);
Button reset = new Button("Reset");
reset.backgroundProperty().set(blue);
reset.setTextFill(Color.WHITE);
// designing the labels
welcome.setAlignment(Pos.TOP_CENTER);
welcome.setFont(new Font("Arial",40));
welcome.setTextFill(Color.RED);
result.setFont(new Font("Arial",30));
result.setTextFill(Color.RED);
welcome.setText(" Welcome to Magic Square Game ");
// designing the pane
gridPane.setAlignment(Pos.CENTER);
gridPane.setPadding(new Insets(11.5,12.5,13.5,14.5));
gridPane.setHgap(5.5);
gridPane.setVgap(5.5);
// adding elements to the pane
gridPane.add(welcome, 0, 0);
gridPane.add(submit, 0, 4, 1, 1);
gridPane.add(reset, 1, 4, 1, 1);
gridPane.add(result, 1, 5, 1, 1);
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
fields[i][j] = new ComboBox<>();
fields[i][j].setEditable(true); // enabling user input for combo boxes
fields[i][j].getItems().addAll("1", "2", "3", "4", "5", "6", "7", "8", "9"); // adding the choices for the combo boxes
gridPane.add(fields[i][j], i+1, j+1);
}
}
// link reset button with its handler
reset.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent actionEvent) {
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
fields[i][j].setValue(""); // emptying the entries for the next attempt
}
}
// remove the previous result from the screen
result.setText(" Enter the numbers again please");
}
});
// link the submit button with its handler
SubmitHandler handler1 = new SubmitHandler();
submit.setOnAction(handler1);
// adding the grid pane to the scene
Scene scene = new Scene(gridPane, 550, 160, Color.rgb(153, 196, 200));
// adding the scene to the stage
primaryStage.setScene(scene);
// setting the title for the program
primaryStage.setTitle("Magic Square");
primaryStage.show();
}
// return true if the array represents a square matrix and false otherwise
public boolean isMagicSquare(int[][] myArray, ArrayList<Integer> arrayList) {
int sumRow = 0, sumMdg = 0, sumColumn = 0, sumSdg = 0; // creating useful variables
// using ArrayList check if elements are duplicated or out of the interval
for (int i = 0; i < arrayList.size(); i++) {
if (arrayList.get(i) > 9 || arrayList.get(i) < 0)
return false;
// check if numbers are repeated
int element = arrayList.get(i);
arrayList.remove(i);
if (arrayList.contains(element))
return false;
}
// check the sum of columns, rows, diagnols
for(int i = 0; i < myArray.length; i++) {
sumRow = sumColumn = 0;
sumMdg += myArray[i][i];
sumSdg += myArray[i][myArray.length - 1 - i];
for (int j = 0; j < myArray.length; j++) {
sumRow += myArray[i][j];
sumColumn += myArray[j][i];
}
if (sumColumn != correctSum || sumRow != correctSum)
return false;
}
return (sumMdg == correctSum) && (sumSdg == correctSum);
}
public static void main(String[] args) {
launch();
}
class SubmitHandler implements EventHandler<ActionEvent> {
@Override
public void handle(ActionEvent event) {
// Array full of the usre's choices that will be passed to isMagicSquare method.
int[][] values = new int[3][3];
// Array list to easily check if numbers are duplicated or >9 or<0
ArrayList<Integer> arrayList = new ArrayList<>(9);
// try statement to handle user's invalid inputs such as words("one","two",....)
try {
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
// check if the fields are empty
if (fields[i][j].getValue().compareTo("") == 0) {
fields[i][j].setValue("0");
}
values[i][j] = Integer.parseInt(fields[i][j].getValue()); // convert the user choices to integers
arrayList.add(values[i][j]); // add elemnts to the one-dimensional array
}
}
} catch (Exception NumberFormatException) {
result.setText(" You entered an invalid input. Please try again");
return;
}
if (isMagicSquare(values, arrayList)) {
result.setText("The matrix is a magic square ");
} else {
result.setText("The matrix is not a magic square. Try again please");
}
}
}
}
Solution 1:[1]
use columnSpam to spam a node horizontally
now label result and wellcome uses 4 columns size.
check columnSpam() at gridpane(javafx8)
to change scene color : scene.setFill()
I added comments where code was modified
public class MagicSquare2 extends Application {
// user-friendly text entries for the matrix
// using combo boxes to allow user to choose or type their choice
ComboBox<String> [][] fields = new ComboBox[3][3];
// labels to display messages to the user
Label welcome = new Label();
Label result = new Label();
GridPane gridPane = new GridPane(); // the appropriate pane for a matrix
final int correctSum = 15; // helpful variable for isMagicSquare method
public void start(Stage primaryStage) {
Background red = new Background(new BackgroundFill(Color.RED, null, null));
Background blue = new Background(new BackgroundFill(Color.BLUE, null, null));
// creating buttons
Button submit = new Button("Submit");
submit.backgroundProperty().set(red);
submit.setTextFill(Color.WHITE);
Button reset = new Button("Reset");
reset.backgroundProperty().set(blue);
reset.setTextFill(Color.WHITE);
// designing the labels
welcome.setAlignment(Pos.TOP_CENTER);
welcome.setFont(new Font("Arial",40));
welcome.setTextFill(Color.RED);
result.setFont(new Font("Arial",30));
result.setTextFill(Color.RED);
welcome.setText(" Welcome to Magic Square Game ");
// designing the pane
gridPane.setAlignment(Pos.CENTER);
gridPane.setPadding(new Insets(11.5,12.5,13.5,14.5));
gridPane.setHgap(5.5);
gridPane.setVgap(5.5);
// gridPane.setGridLinesVisible(true);
// adding elements to the pane
gridPane.setColumnSpan(welcome, 4); //columnspam
gridPane.add(welcome, 0, 0);
gridPane.add(submit, 1, 4, 1, 1);
gridPane.add(reset, 3, 4, 1, 1);
gridPane.setColumnSpan(result, 4);//columspam
gridPane.add(result, 0, 5);
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
fields[i][j] = new ComboBox<>();
fields[i][j].setEditable(true); // enabling user input for combo boxes
fields[i][j].getItems().addAll("1", "2", "3", "4", "5", "6", "7", "8", "9"); // adding the choices for the combo boxes
gridPane.add(fields[i][j], i+1, j+1);
}
}
// link reset button with its handler
reset.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent actionEvent) {
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
fields[i][j].setValue(""); // emptying the entries for the next attempt
}
}
// remove the previous result from the screen
result.setText(" Enter the numbers again please");
}
});
// link the submit button with its handler
SubmitHandler handler1 = new SubmitHandler();
submit.setOnAction(handler1);
// adding the grid pane to the scene
Scene scene = new Scene(gridPane, 550, 160, Color.rgb(153, 196, 200));
scene.setFill(Color.CYAN); // change color scene
// adding the scene to the stage
primaryStage.setScene(scene);
// setting the title for the program
primaryStage.setTitle("Magic Square");
primaryStage.show();
}
// return true if the array represents a square matrix and false otherwise
public boolean isMagicSquare(int[][] myArray, ArrayList<Integer> arrayList) {
int sumRow = 0, sumMdg = 0, sumColumn = 0, sumSdg = 0; // creating useful variables
// using ArrayList check if elements are duplicated or out of the interval
for (int i = 0; i < arrayList.size(); i++) {
if (arrayList.get(i) > 9 || arrayList.get(i) < 0)
return false;
// check if numbers are repeated
int element = arrayList.get(i);
arrayList.remove(i);
if (arrayList.contains(element))
return false;
}
// check the sum of columns, rows, diagnols
for(int i = 0; i < myArray.length; i++) {
sumRow = sumColumn = 0;
sumMdg += myArray[i][i];
sumSdg += myArray[i][myArray.length - 1 - i];
for (int j = 0; j < myArray.length; j++) {
sumRow += myArray[i][j];
sumColumn += myArray[j][i];
}
if (sumColumn != correctSum || sumRow != correctSum)
return false;
}
return (sumMdg == correctSum) && (sumSdg == correctSum);
}
public static void main(String[] args) {
launch();
}
class SubmitHandler implements EventHandler<ActionEvent> {
@Override
public void handle(ActionEvent event) {
// Array full of the usre's choices that will be passed to isMagicSquare method.
int[][] values = new int[3][3];
// Array list to easily check if numbers are duplicated or >9 or<0
ArrayList<Integer> arrayList = new ArrayList<>(9);
// try statement to handle user's invalid inputs such as words("one","two",....)
try {
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
// check if the fields are empty
if (fields[i][j].getValue().compareTo("") == 0) {
fields[i][j].setValue("0");
}
values[i][j] = Integer.parseInt(fields[i][j].getValue()); // convert the user choices to integers
arrayList.add(values[i][j]); // add elemnts to the one-dimensional array
}
}
} catch (Exception NumberFormatException) {
result.setText(" You entered an invalid input. Please try again");
return;
}
if (isMagicSquare(values, arrayList)) {
result.setText("The matrix is a magic square ");
} else {
result.setText("The matrix is not a magic square. Try again please");
}
}
}
}
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Giovanni Contreras |