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Thread: How can i adjust TextArea size automatically

  1. #1
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    Default How can i adjust TextArea size automatically

    [Consider the program below]

    /*
    * To change this template, choose Tools | Templates
    * and open the template in the editor.
    */

    package scheduling;

    /**
    *
    * @author ThankGod
    */
    import javax.swing.*;
    import java.awt.event.*;
    public class DualQuery extends JFrame implements ActionListener
    {
    JMenuBar jmb = new JMenuBar();
    JMenu file = new JMenu("File");
    JMenuItem exe = new JMenuItem("Execute Query",new ImageIcon("execute.jpg"));
    JPanel querypanel = new JPanel();
    JPanel resultpanel = new JPanel();
    JTextArea textArea = new JTextArea(10,60);
    JLabel resultlabel = new JLabel(" Query Result");

    public DualQuery()
    {

    textArea.setText("Query");
    resultpanel.add(resultlabel);
    exe.addActionListener(this);
    file.add(exe);
    jmb.add(file);
    JScrollPane scrollPane = new JScrollPane(textArea);
    scrollPane.setVerticalScrollBarPolicy(JScrollPane. VERTICAL_SCROLLBAR_ALWAYS);
    querypanel.add(scrollPane);
    JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, true, querypanel, resultpanel);
    splitPane.setOneTouchExpandable(true);
    getContentPane().add(splitPane);
    setSize(700, 650);// here's the part where i center the jframe on screen
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setVisible(true);
    }//end of constructor
    public void actionPerformed(ActionEvent e)
    {
    if(e.getSource()==exe){
    //Executing Engine here
    MySQLController mysql = new MySQLController(resultpanel,textArea.getText());

    }
    }//end main
    }

    public class MySQLController(JPanel panel,String query){
    JLabel fname = new JLabel("First Name:");
    JTextField nametf = new JTextField();

    public MySQLControler(){
    panel.add(fname);
    panel.add(namef);
    jpanel.add(fname);
    }

    }
    1. I want the content of the firstname label and text field from the MySQLController class to automatically updated in the DualQuery class when a user click on execute menuitem But its not given me the desired result

    2. Is it possible to make the JTextArea's size adjust automatically when the user adjust the splitpane up and down?


  2. #2
    Member Zyrion's Avatar
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    Default Re: How can i adjust TextArea size automatically

    Indent your code and wrap code blocks around it for readability.

    1. What results are you expecting? What results have been produced?

    2. Yes it is possible to adjust the size of a JTextArea.

    Java API: JTextArea

    java.awt.TextArea has two properties rows and columns that are used to determine the preferred size. JTextArea uses these properties to indicate the preferred size of the viewport when placed inside a JScrollPane to match the functionality provided by java.awt.TextArea. JTextArea has a preferred size of what is needed to display all of the text, so that it functions properly inside of a JScrollPane. If the value for rows or columns is equal to zero, the preferred size along that axis is used for the viewport preferred size along the same axis.

  3. #3
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    Default Re: How can i adjust TextArea size automatically

    1. Actually i am expecting records to be read from MySQL table, placed in the resultpanel and automatically updated in the resultpanel of the main class.

    2. Yes. But when you scroll down the split pane, you see empty panel under the textarea instead of the textarea adjusting automatically to fill the space

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