🚀 go-pugleaf

The GUI is not updated during the FOR loop. That's why the progressbar is
either empty or full. You need to perform your for loop in a separate
thread. Read about the javax.swing.JProgressBar control for some additional
info.

Jeroen

"Matt Stevens" <mhstevens@mmm.com> wrote in message
news:394673A9.F203FA29@mmm.com...
> Hi all,
>
> I can not seem to update a  progressBar in Real-Time.  I wrote a simple
> app (below) to show the problem.  I put a PB.setValue() inside a FOR
> loop, the the PB doesn't update until the FOR loop finishes.  Does
> anyone know what the problems is?
>
> Matt
> ---------------------------------------
> import java.awt.*;
> import java.awt.event.*;
> import com.borland.jbcl.control.*;
> import com.borland.jbcl.layout.*;
> import javax.swing.*;
> import jclass.bwt.JCProgressMeter;
>
> file://=============================================
> public class progressApp extends JFrame
> {
>   ButtonControl buttonControl1 = new ButtonControl();
>   XYLayout xYLayout1 = new XYLayout();
>   ButtonControl buttonControl2 = new ButtonControl();
>   file://JProgressBar jProgressBar1 = new JProgressBar();
>   JCProgressMeter jProgressBar1 = new JCProgressMeter();
>   JButton jButton1 = new JButton();
>   progressDLG pd = new progressDLG(this,"Test Progress Bar DLG",false);
>   JMenuBar menuBar1 = new JMenuBar();
>   JMenu menu1 = new JMenu();
>   JMenuItem menuItem1 = new JMenuItem();
>
>
>   file://Main method ---------------------------------------------
>   public static void main(String[] args) {
>     try  {
>
> UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
>     }
>     catch(Exception e) {
>     }
>     new progressApp();
>   }
>
>   file://Construct the application -----------------------------
>   public progressApp()
>   {
>     file://enableEvents(AWTEvent.WINDOW_EVENT_MASK);
>     try  {
>       jbInit();
>     }
>     catch(Exception e) {
>       e.printStackTrace();
>     }
>     pack();
>     validate();
>     this.setVisible(true);
>   }
>
>    file://Component initialization -------------------------
>   private void jbInit() throws Exception  {
>     buttonControl1.setLabel("showDLG");
>     buttonControl1.addMouseListener(new java.awt.event.MouseAdapter() {
>
>       public void mouseClicked(MouseEvent e) {
>         buttonControl1_mouseClicked(e);
>       }
>     });
>     this.getContentPane().setLayout(xYLayout1);
>     this.setJMenuBar(menuBar1);
>     this.setTitle("Test  Prog Bar");
>     xYLayout1.setHeight(200);
>     xYLayout1.setWidth(300);
>     this.setSize(300,200);
>     this.setLocation(200,200);
>     buttonControl2.setLabel("start pBar");
>     buttonControl2.addMouseListener(new java.awt.event.MouseAdapter() {
>       public void mouseClicked(MouseEvent e) {
>         buttonControl2_mouseClicked(e);
>       }
>     });
>     jButton1.setText("start");
>     jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
>
>       public void mouseClicked(MouseEvent e) {
>         jButton1_mouseClicked(e);
>       }
>     });
>     menu1.setLabel("File");
>     menuItem1.setLabel("exit");
>     menuItem1.addActionListener(new java.awt.event.ActionListener() {
>
>       public void actionPerformed(ActionEvent e) {
>         menuItem1_actionPerformed(e);
>       }
>     });
>     this.getContentPane().add(jProgressBar1, new XYConstraints(11, 41,
> 226, 34));
>     this.getContentPane().add(buttonControl1, new XYConstraints(8, 97,
> 77, -1));
>     this.getContentPane().add(jButton1, new XYConstraints(104, 98, 73,
> -1));
>     this.getContentPane().add(buttonControl2, new XYConstraints(194, 99,
> -1, -1));
>     menuBar1.add(menu1);
>     menu1.add(menuItem1);
>   }
>
>
>
>   void buttonControl1_mouseClicked( MouseEvent e )
>   {
>      file://System.out.println("Show the Dialog");
>      pd.setValue(0);
>      pd.setVisible(true);
>      if (pd.isVisible())
>      {
>              file://System.out.println("PD dlg is visible");
>      } else {
>               file://System.out.println("PD dlg is not visible");
>      }
>   }
>
>
>
>   file://----------------------------------------------
>   void buttonControl2_mouseClicked(MouseEvent e) {
>
>      try {
>          for (int i = 0; i < 101; i++)
>          {
>             System.out.println("In JProgress Bar FOR loop I = "+i);
>             Thread.sleep(100);
>             jProgressBar1.setValue(i);
>             file://jProgressBar1.repaint();
>          }
>      } catch (Throwable t) { }
>   }
>
>   file://--------------------------------------
>   void jButton1_mouseClicked(MouseEvent e)
>   {
>     try {
>          for (int i = 0; i < 101; i++)
>          {
>             System.out.println("In DLG FOR loop I = "+i);
>             Thread.sleep(100);
>             pd.setValue(i);
>          }
>      } catch (Throwable t) { }
>      file://pd.setVisible(false);
>
>   }
>
>   void menuItem1_actionPerformed(ActionEvent e) {
>       System.exit(0);
>   }
> }
>
>
>
> file://-----------------------------
>
> import java.awt.*;
> import javax.swing.*;
> import com.borland.jbcl.layout.*;
> import java.awt.event.*;
>
> public class progressDLG extends JDialog {
>   JPanel panel1 = new JPanel();
>   XYLayout xYLayout1 = new XYLayout();
>   JProgressBar jProgressBar1 = new JProgressBar();
>   public int totFonts = 0;
>   public int curFonts = 0;
>   public int col = 100;
>   public int row = 100;
>
>   public progressDLG(Frame frame, String title, boolean modal) {
>     super(frame, title, modal);
>     try  {
>       jbInit();
>       pack();
>     }
>     catch(Exception ex) {
>       ex.printStackTrace();
>     }
>   }
>
>   public progressDLG() {
>     this(null, "Adding Fonts...", false);
>   }
>
>   void jbInit() throws Exception {
>     jProgressBar1.setValue(0);
>     panel1.setLayout(xYLayout1);
>     xYLayout1.setHeight(93);
>     xYLayout1.setWidth(452);
>     getContentPane().add(panel1);
>     panel1.add(jProgressBar1, new XYConstraints(12, 34, 421, 29));
>     this.setLocation(col,row);
>   }
>
>   public void setValue( int n ) {
>          jProgressBar1.setValue( n );
>   }
>
>   public void incrValue() {
>          curFonts++;
>          int p = (curFonts * 100) / totFonts;
>          jProgressBar1.setValue(p);
>          jProgressBar1.repaint();
>   }
>
>   public void setNumFonts( int n ) {
>        totFonts = n;
>   }
>
>
>   public void setULHC( Point p ) {
>      this.setLocation( p );
>   }
>
>
>
>   public static void main() {
>      JFrame fr = new JFrame("test");
>      progressDLG pd = new progressDLG(fr,"Wait",false);
>      pd.setValue(0);
>      fr.setVisible(true);
>      pd.setVisible(true);
>      try {
>             for (int i = 0; i < 101; i++) {
>                Thread.sleep(10000);
>                pd.setValue(i);
>             }
>           }
>             catch (Throwable t) {}
>   }
>
> }
>
>
> --
> __________________________________
> Dr. Matt H. Stevens
> GUI Development Specialist
> 3M Company
> 3M Center, Bldg 235-2AWS-63
> Saint Paul, MN  55144-1000  USA
>
> TEL:   651-736-1344
> FAX:   651-737-0410
> email: mhstevens@mmm.com
> __________________________________
>
>