I'm trying to resize the size of my Jframe to fit the contents but it's not working. The setSize command has no effect on my window size (always very small)
privatestaticvoid createAndShowGUI()
{
JFrame frame =new JFrame("GameDisplay");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new GameDisplay());
frame.setSize(800,600);
frame.pack();
frame.setVisible(true);
}
From the javadoc
public void pack()
Causes this Window to be sized to fit the preferred size and layouts of its subcomponents.
If the window and/or its owner are not yet displayable, both are made displayable before calculating the preferred size.
The Window will be validated after the preferredSize is calculated.
you are setting the size, then resetting the size again.
> Because I thought you needed it to get JFrames to work
When you make an assumtion you make an ss out of u and mtion.
Then why not read up about it and make sure?
Now that the frame is the right size I need to but the buttons in the correct locations but b/c of how my code is set up it won't let me do anything. Because I have a static method, I'm not allowed to touch reset. If I put the creation of the button into the static method though, I'm not allowed to use addActionListener(this)
public class GameDisplay extends JPanel implements MouseListener, ActionListener
{
private GamePlay game;
public static Image[] images;
private JButton reset;
public GameDisplay()
{
super();
//Load Images
images = loadImages();
//Start Game
game = new GamePlay();
//Add Components
reset = new JButton("Reset");
reset.addActionListener(this);
addMouseListener(this);
add(reset);
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame("GameDisplay");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new GameDisplay());
frame.setSize(800,700);
reset.setBounds(200,200,200,200);//Won't let me do this
//frame.pack();
frame.setVisible(true);
}
I did read up on it, I looked at example source code and stuff and everything had frame.pack(). I didn't realize it just resized I thought it actually "packed" stuff together that I needed.
Movereset.setBounds(200,200,200,200);
into the GameDisplay constructor.
Why aren't you using layout managers?
http://java.sun.com/docs/books/tutorial/uiswing/layout/using.html
I don't really understand what they are. I've seen that site but I'm not understanding
I moved the button code into the GameDisplay constructor and it compiles and runs but the button doesn't go anywhere, it stays where it was
In GameDisplay constructor you call super() which invokes JPanel's default constructor which initializes the panel to use FlowLayout as it's layout manager.
If you want to use absolute positioning you can try calling super(null) instead, effectively using no layout manager. This however forces you to position all components on that panel absolutely.
That worked. So I was using a layout manager then? The default one. If I'm not allowed to put a button where I want it, whats the point of a layout manager?
Generally speaking, absolute positioning is considered bad practice.
Layout managers help you layout components in some specific way, e.g. FlowLayout lays out components flowing from left to right (the default) or from right to left. This layout is ideal to use for instance in toolbars.
That makes sense, but since I'm using an image, and I need the buttons to not be on top of the image, I guess in this case its ok to do it?
