JComponent Placement
 

Hi. When I add a JComponent to my JFrame, it isn't the size of the remaining space in the frame. I want it to work in a way so that when i add a JComponent, it (and it's contents) stretches to fill the remaining space in the screen... Is there anyway to do that?

Re: JComponent Placement
 

This will depend on your LayoutManager. What LayoutManager are you using?

Re: JComponent Placement
 

I'm not... But I found a way that works. I have a thread that has static copies of the JFrame and the JComponent, and is always watching to see if the height or width is changing, then resizes the JComponent. I don't know it that is the way it's supposed to be done (probably not), but it is working. I only have 2 Components in the frame, so i think this way should be fine....

Re: JComponent Placement
 

VernonDozier>What LayoutManager are you using?
llemes4011>I'm not... But I found a way that works.
Can I see the way you have used?
Do you know BorderLayout, GridBagLayout & GridBagConstraints?

Re: JComponent Placement
 

Yeah here's the code:

package JEmail.util;



import java.util.*;

import java.awt.*;

import javax.swing.*;



public class FrameResizeHandler extends Thread

{

    //consists of 2 JSplitPanes (one nested)

    private static ContentViewer cv;

    //components to resize

    private static ArrayList<JComponent> components;

    // JFrame to resize to

    private static JFrame watching; 

    

    private static int width;  // JFrame width to check against

    private static int height; // JFrame height to check against

    

    /**

     * I used an ArrayList and JComponents because I want to 

     * get it so that it can deal with multiple resizings at once

     */

    public FrameResizeHandler(JFrame jf, JComponent jc){

        watching = jf;

        components = new ArrayList<JComponent>();

        components.add(jc);

        width = watching.getWidth();

        height = watching.getHeight();

    }

    

    public void run(){

        while(true){

            if(width!=watching.getWidth() || height!=watching.getHeight()){

                if(components.get(0) instanceof ContentViewer){

                          // I know what the first element is so that's why it looks like this

                    cv = (ContentViewer)components.get(0); 

                    // adjust the JComponents' size

                    cv.setNewSize(watching.getWidth()-watching.getInsets().left-watching.getInsets().right, 

                                  watching.getHeight()-watching.getInsets().top-watching.getInsets().bottom-57);

                }

                width = watching.getWidth();  // re-adjust the dimensions to check against

                height = watching.getHeight();

            }

        }

    }

}

Note that this is still VERY sloppy. It doesn't completely work (It doesn't fix the size when the MAXIMIZE button is pressed), and is slow. I need to put in checks to determine when the thread actually goes through its loop so it doesn't eat up processor space (WHICH IT DOES! >=[ )

But Yes. I do know about BorderLayout, and I hate GridBagLayout. It's a total pain in the butt. But it does have its perks. I used it in another section of my program and it worked well there. I couldn't get it to work here.

Re: JComponent Placement
 

Use BorderLayout and add a component with CENTER position. Do not forget to issue validate() method of container after component has been added to that container.

Re: JComponent Placement
 

I tried that and it didn't resize it. ( I tried it as a JPanel too...)

Re: JComponent Placement
 

Please post complete code with bb code tags.

Re: JComponent Placement
 

Okay, Here's what I have:

package JEmail.util;



import java.awt.*;

import javax.swing.*;



public class ContentViewer extends JPanel

{

    public ContentViewer(){

        createAndShowGUI();

    }

    

    public void createAndShowGUI(){

        

        WindowComponents.vertSplitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);

        WindowComponents.horiSplitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);

        WindowComponents.files = new JTree();

        WindowComponents.tabs = new JTabbedPane();

        WindowComponents.display = new JPanel();

        WindowComponents.tabs.add(new InboxTab(), "Inbox");

        WindowComponents.tabs.add(new ContactsTab(), "Contacts");

        WindowComponents.tabs.add(new NotesTab(), "Notes");

        

        WindowComponents.vertSplitPane.setTopComponent(WindowComponents.tabs);

        WindowComponents.vertSplitPane.setBottomComponent(WindowComponents.display);

        WindowComponents.vertSplitPane.setDividerLocation(.5);

        WindowComponents.horiSplitPane.setLeftComponent(WindowComponents.files);

        WindowComponents.horiSplitPane.setRightComponent(WindowComponents.vertSplitPane);

                

        this.add(WindowComponents.horiSplitPane);

        

    }

}

package JEmail;

import JEmail.util.*;

import javax.swing.*;

import java.awt.*;

/**

 * Write a description of class JMail_Runner here.

 * 

 * @author (your name) 

 * @version (a version number or a date)

 */

public class JMail_Runner{



    private static final int PWIDTH = 600;

    private static final int PHEIGHT = 500;



    JFrame jMailWindow;

    JEmailMenuBar menuBar;

    ContentViewer content;

    FrameResizeHandler frh;

    

    Insets windowInsets;

    

    public JMail_Runner(){

        createAndShowGUI();

    }

    

    public void createAndShowGUI(){

        try{ // Set the L&F to match the System - will have option to change later.

            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

        }catch(Exception e){

            e.printStackTrace();

        }



        jMailWindow = new JFrame("JEmail");

        jMailWindow.setPreferredSize(new Dimension(PWIDTH, PHEIGHT));

        jMailWindow.setLocation(150,100);

        jMailWindow.setSize(PWIDTH, PHEIGHT);

        

        Container pane = jMailWindow.getContentPane();

        pane.setLayout(new BorderLayout());

        

        menuBar = new JEmailMenuBar();

        content = new ContentViewer();

        

        // The MenuBar stretches fine... just not the content object

        pane.add(menuBar, BorderLayout.NORTH);

        pane.validate();

        pane.add(content, BorderLayout.CENTER);

        pane.validate();

        

        jMailWindow.setVisible(true);

    }

    

    public static void main(String[] args) {

        //Schedule a job for the event-dispatching thread:

        //creating and showing this application's GUI.

        javax.swing.SwingUtilities.invokeLater(new Runnable() {

            public void run() {

                new JMail_Runner();

            }

        });

    }

}

Re: JComponent Placement
 

As per your post I did't find any ambiguity in your code. I have added JMenuBar and ContentView and some components into ContentView - There is no problem.

I am not sure about JEmailMenuBar class. If it is JMenuBar then use setJMenuBar method of JFrame.