How do I make my custom Swing component visible?
- by Alex
I have no idea why it won't show. First I create an instance of the component and then add it to a certain element in a two-dimensional JPanel array. Then I loop through that array and add each JPanel to another JPanel container which is to hold all the JPanels.
I then add that final container to my JFrame window and set visibility to true, it should be visible?
public class View extends JFrame {
Board gameBoard;
JFrame gameWindow = new JFrame("Chess");
JPanel gamePanel = new JPanel();
JPanel[][] squarePanel = new JPanel[8][8];
JMenuBar gameMenu = new JMenuBar();
JButton restartGame = new JButton("Restart");
JButton pauseGame = new JButton("Pause");
JButton log = new JButton("Log");
View(Board board){
gameWindow.setDefaultCloseOperation(EXIT_ON_CLOSE);
gameWindow.setSize(400, 420);
gameWindow.getContentPane().add(gamePanel, BorderLayout.CENTER);
gameWindow.getContentPane().add(gameMenu, BorderLayout.NORTH);
gameMenu.add(restartGame);
gameMenu.add(pauseGame);
gameMenu.add(log);
gameBoard = board;
drawBoard(gameBoard);
gameWindow.setResizable(false);
gameWindow.setVisible(true);
}
public void drawBoard(Board board){
for(int row = 0; row < 8; row++){
for(int col = 0; col < 8; col++){
Box box = new Box(board.getSquare(col, row).getColour(), col, row);
squarePanel[col][row] = new JPanel();
squarePanel[col][row].add(box);
}
}
for(JPanel[] col : squarePanel){
for(JPanel square : col){
gamePanel.add(square);
}
}
}
}
@SuppressWarnings("serial")
class Box extends JComponent{
Color boxColour;
int col, row;
public Box(Color boxColour, int col, int row){
this.boxColour = boxColour;
this.col = col;
this.row = row;
repaint();
}
protected void paintComponent(Graphics drawBox){
drawBox.setColor(boxColour);
drawBox.drawRect(50*col, 50*row, 50, 50);
drawBox.fillRect(50*col, 50*row, 50, 50);
}
}
A final question as well. Notice how each Box component has a position, what happens to the position when I add the component to a JPanel and add the JPanel to my JFrame?
Does it still have the same position in relation to the other Box components?
