Re: How do I tie my image to my panel ?

From:
Lew <noone@lewscanon.com>
Newsgroups:
comp.lang.java.gui
Date:
Fri, 17 Apr 2009 21:02:50 -0400
Message-ID:
<gsb8rs$dv5$1@news.albasani.net>
Iain wrote:

I have some code that I have cobbled together from various sources on
the web (Thanks to all those whose source has helped me get this far).
I am attempting to write a small test application using MVC which will
open a small window and display an image as a background and then
allow me to move an object around using the keyboard..

I have the code below which opens a window in the middle of the
screen. However, I do not know how to attach the image (img) to the
panel (jpanel).
+++++++++++++++++++++++++++++++++++++++++++++++++++


A small part of

The relev[a]nt code.

        /* Variables required. */
        private Model model; // The Model to register with
and
                                       // receive updates from


Use narrower indentation for Usenet posts: four spaces or fewer, and no TABs.

        private Controller controller; // The controller for events
        private Canvas canvas; // The canvas to be drawn on

        Image img;

        public ViewGraphical(Model m)
          {
          super("Test Application Using MVC");


What is the parent class?

<http://sscce.org/>

          JPanel p = new JPanel();

          try
            {
            String filePath = "C:\\Documents and Settings..............
\
\ThePen.jpg";
            img = ImageIO.read(new File(filePath));
            }
          catch (IOException e)
            {
            String lerror = e.getMessage();


How does a message that is never logged or displayed help you?

            }

// this.setBackground(new Color(124, 100, 95));

          this.setContentPane(p);

          this.pack();
          this.setVisible(true);


Don't 'pack()' and 'setVisible(true)' so early. Wait until the GUI is
constructed.

          this.setSize(500, 500);

          // This will set the panel in the middle of the screen
          // First get the actual screen size
          Dimension screenSize = Toolkit.getDefaultToolkit
().getScreenSize();

          // Get the size and height of the frame object
          Dimension size = this.getSize();
          // assign the height and width of the screen as half of the
actual
size
          screenSize.height = screenSize.height/2;
          screenSize.width = screenSize.width/2;
          // Assign the frame height and size as half of the current
frame
size
          size.height = size.height/2;
          size.width = size.width/2;
          // Now set the co-ordinates of the frame
          int y = screenSize.height - size.height;
          int x = screenSize.width - size.width;
          // Set the location of the panel
          this.setLocation(x, y);

          // Make sure that the frame is on top
          this.setAlwaysOnTop(true);


Now you can 'pack()' and 'setVisible()'.

          model = m;
          model.addObserver(this); // Register this class with the
Model


Don't let 'this' escape from the constructor. Use a method on the fully
constructed instance to do these things.

          controller = new Controller(model); // Make the Controller
using
the same Model
          }


--
Lew

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