Status Bar

[M626]

I am having problems trying to create a status bar at the bottom that will be used to display all my event messages instead of using the JOptionPane.showMessageDialog. It get annoying after a while and I would rather have the diplay in a status bar. Can anyone help...i'll post the code I have now...

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

class Draw extends Frame implements
ActionListener, // menu item
ItemListener, // radio buttons
MouseListener, // mouse clicks
MouseMotionListener, // mouse movement
WindowListener { // Window

/* -------------------------------------------------------- */
/* */
/* FIELDS */
/* */
/* -------------------------------------------------------- */

static final int WIDTH = 800; // Sketch pad width
static final int HEIGHT = 600; // Sketch pad height
int upperLeftX, upperLeftY; // Rectangle upper left corner coords.
int width, height; // Rectangle size
int x1, y1, x2, y2; // Point coords.
boolean fillFlag = false;
boolean eraseFlag = false;
String drawColor = new String("black"
String drawShape = new String("line"

// Help

String helpText = "THIS APPLET ALLOWS YOU TO DRAW LIKE A PAINT PAD" +
"\n" + "PLUS INFORMS YOU WHEN VARIOUS EVENTS OCCUR";

// Components

TextField color = new TextField();
TextField shape = new TextField();
TextField position = new TextField();
CheckboxGroup fillOutline = new CheckboxGroup();
TextArea info = new TextArea(helpText,0,0,TextArea.SCROLLBARS_VERTICAL_ONLY);
Frame about = new Frame("About Terry's EventViewer"

// Menues

String[] colorNames = {"black","blue","cyan","gray","green","magenta","red","white"};
String[] shapeNames = {"line","square","rectangle","circle","ellipse"};
String[] toolNames = {"erase","clearpad"};
String[] helpNames = {"information","about"};


/* -------------------------------------------------------- */
/* */
/* CONSTRUCTORS */
/* */
/* -------------------------------------------------------- */

public Draw(String heading) {
super(heading);
setBackground(Color.yellow);
setLayout(null);

/* Initialise components */

initialiseTextFields();
initializeMenuComponents();
initializeRadioButtons();

addWindowListener(this);
addMouseListener(this);
addMouseMotionListener(this);
}

/* -------------------------------------------------------- */
/* */
/* METHODS */
/* */
/* -------------------------------------------------------- */

/* Initialise Text Fields */

private void initialiseTextFields() {
// Add text field to show colour of figure
color.setLocation(5,490);
color.setSize(80,30);
color.setBackground(Color.white);
color.setText(drawColor);
add(color);

// Add text field to show shape of figure
shape.setLocation(5,525);
shape.setSize(80,30);
shape.setBackground(Color.white);
shape.setText(drawShape);
add(shape);

// Add text field to show position of mouse
position.setLocation(5,560);
position.setSize(80,30);
position.setBackground(Color.white);
add(position);

// Set up text field for help
info.setLocation(150,250);
info.setSize(500,100);
info.setBackground(Color.white);
info.setEditable(false);
}

/* Initialize Menu Components */

private void initializeMenuComponents() {
// Create menu bar

MenuBar bar = new MenuBar();

// Add colurs menu

Menu colors = new Menu("COLORS"
for(int index=0;index < colorNames.length;index++)
colors.add(colorNames[index]);
bar.add(colors);
colors.addActionListener(this);

// Add shapes menu

Menu shapes = new Menu(&quot;SHAPES&quot;
for(int index=0;index < shapeNames.length;index++)
shapes.add(shapeNames[index]);
bar.add(shapes);
shapes.addActionListener(this);

// Add tools menu

Menu tools = new Menu(&quot;TOOLS&quot;
for(int index=0;index < toolNames.length;index++)
tools.add(toolNames[index]);
bar.add(tools);
tools.addActionListener(this);

// Add help menu

Menu help = new Menu(&quot;HELP&quot;
for(int index=0;index < helpNames.length;index++)
help.add(helpNames[index]);
bar.add(help);
help.addActionListener(this);

// Set up menu bar

setMenuBar(bar);
}

/* Initilalise Radio Buttons */

private void initializeRadioButtons() {

// Define checkbox

Checkbox fill = new Checkbox(&quot;fill&quot;,fillOutline,false);
Checkbox outline = new Checkbox(&quot;outline&quot;,fillOutline,true);

// Fill buttom

fill.setLocation(5,455);
fill.setSize(80,30);
add(fill);
fill.addItemListener(this);

// Outline button

outline.setLocation(5,420);
outline.setSize(80,30);
add(outline);
outline.addItemListener(this);
}

/* -------------------------------------------------------- */
/* */
/* LISTENERS */
/* */
/* -------------------------------------------------------- */

// ----------------------- ACTION LISTENERS -------------------

/* Action performed. Detects which item has been selected from a menu */

public void actionPerformed(ActionEvent event) {
{
JOptionPane.showMessageDialog(null, &quot;Action Listener In Process&quot;
}
Graphics g = getGraphics();

String source = event.getActionCommand();

// Identify chosen colour if any

for (int index=0;index < colorNames.length;index++) {
if (source.equals(colorNames[index])) {
drawColor = colorNames[index];
color.setText(drawColor);
return;
}
}

// Identify chosen shape if any

for (int index=0;index < shapeNames.length;index++) {
if (source.equals(shapeNames[index])) {
drawShape = shapeNames[index];
shape.setText(drawShape);
return;
}
}

// Identify chosen tools if any

if (source.equals(&quot;erase&quot) {
eraseFlag= true;
return;
}
else {
if (source.equals(&quot;clearpad&quot) {
remove(info);
g.clearRect(0,0,800,600);
return;
}
}

// Identify chosen help

if (source.equals(&quot;information&quot) {
add(info);
return;
}
else displayAboutWindow(about);
}

/* Dispaly About Window: Shows iformation aboutb Draw programme in
separate window */

private void displayAboutWindow(Frame about) {
about.setLocation(300,300);
about.setSize(350,160);
about.setBackground(Color.cyan);
about.setFont(new Font(&quot;Serif&quot;,Font.ITALIC,14));
about.setLayout(new FlowLayout(FlowLayout.LEFT));

about.add(new Label(&quot;Author: Terry Dhanraj&quot);
about.add(new Label(&quot;Title: Event Viewer&quot);
about.add(new Label(&quot;Date: Tuesday, 14 May 2002&quot);
about.add(new Label(&quot;FINAL PROJECT NEEDED TO GRADUATE&quot);
about.setVisible(true);
about.addWindowListener(this);
}

// ----------------------- ITEM LISTENERS -------------------

/* Item state changed: detect radio button presses. */

public void itemStateChanged(ItemEvent event) {
JOptionPane.showMessageDialog(null, &quot;Item Listener In Process&quot;
if (event.getItem() == &quot;fill&quot fillFlag=true;
else if (event.getItem() == &quot;outline&quot fillFlag=false;
}

// ---------------------- MOUSE LISTENERS -------------------

/* Blank mouse listener methods */

public void mouseClicked(MouseEvent event) {{
JOptionPane.showMessageDialog(null, &quot;Mouse Listener In Process&quot;
}}
public void mouseEntered(MouseEvent event) {}
public void mouseExited(MouseEvent event) {}

/* Mouse pressed: Get start coordinates */

public void mousePressed(MouseEvent event) {

// Cannot draw if erase flag switched on.

if (eraseFlag) return;

// Else set parameters to 0 and proceed
upperLeftX=0;
upperLeftY=0;
width=0;
height=0;

x1=event.getX();
y1=event.getY();

Graphics g = getGraphics();

// Display start point

g.drawString(&quot;.&quot;,x1,y1);
displayMouseCoordinates(x1,y1);
}

public void mouseReleased(MouseEvent event) {
Graphics g = getGraphics();

// Get and display mouse coordinates

x2=event.getX();
y2=event.getY();
displayMouseCoordinates(x2,y2);

// If erase flag set to true reset to false

if (eraseFlag) {
eraseFlag = false;
return;
}

// Else draw shape

selectColor(g);
if (drawShape.equals(&quot;line&quot) g.drawLine(x1,y1,x2,y2);
else drawClosedShape(drawShape,g);

// Remove reference point

g.setColor(Color.yellow);
g.drawString(&quot;.&quot;,x1,y1);
g.setColor(Color.black);
}

/* Display Mouse Coordinates */

private void displayMouseCoordinates(int x, int y) {
position.setText(&quot;[&quot; + String.valueOf(x) + &quot;,&quot; + String.valueOf + &quot;]&quot;
}

/* Select colour */

private void selectColor(Graphics g) {
for (int index=0;index < colorNames.length;index++) {
if (drawColor.equals(colorNames[index])) {
switch(index) {
case 0: g.setColor(Color.black);break;
case 1: g.setColor(Color.blue);break;
case 2: g.setColor(Color.cyan);break;
case 3: g.setColor(Color.gray);break;
case 4: g.setColor(Color.green);break;
case 5: g.setColor(Color.magenta);break;
case 6: g.setColor(Color.red);break;
case 7: g.setColor(Color.white);break;
default: g.setColor(Color.yellow);
}
}
}
}

/* Draw closed shape */

private void drawClosedShape(String shape,Graphics g) {
// Calculate correct parameters for shape

upperLeftX = Math.min(x1,x2);
upperLeftY = Math.min(y1,y2);
width = Math.abs(x1-x2);
height = Math.abs(y1-y2);

// Draw appropriate shape

if (shape.equals(&quot;square&quot) {
if (fillFlag) g.fillRect(upperLeftX,upperLeftY,width,width);
else g.drawRect(upperLeftX,upperLeftY,width,width);
}
else {
if (shape.equals(&quot;rectangle&quot) {
if (fillFlag) g.fillRect(upperLeftX,upperLeftY,width,height);
else g.drawRect(upperLeftX,upperLeftY,width,height);
}
else {
if (shape.equals(&quot;circle&quot) {
if (fillFlag) g.fillOval(upperLeftX,upperLeftY,width,width);
else g.drawOval(upperLeftX,upperLeftY,width,width);
}
else {
if (fillFlag) g.fillOval(upperLeftX,upperLeftY,width,height);
else g.drawOval(upperLeftX,upperLeftY,width,height);
}
}
}
}

// ----------------------- MOUSE MOVEMENT --------------------

/* Mouse moved */

public void mouseMoved(MouseEvent event){
//{
// JOptionPane.showMessageDialog( null , &quot;Mouse Motion Listener In Process&quot;
//}
displayMouseCoordinates(event.getX(),event.getY());
}

/* Mouse dragged */

public void mouseDragged(MouseEvent event) {
Graphics g = getGraphics();

x2=event.getX();
y2=event.getY();

if (eraseFlag) g.clearRect(x2,y2,5,5);
displayMouseCoordinates(x1,y1);
}

// ---------------------- WINDOW LISTENERS -------------------

/* Blank methods for window listener */

public void windowClosed(WindowEvent event) {}
public void windowDeiconified(WindowEvent event) {}
public void windowIconified(WindowEvent event) {}
public void windowActivated(WindowEvent event) {}
public void windowDeactivated(WindowEvent event) {}
public void windowOpened(WindowEvent event) {}

/* Window Closing */

public void windowClosing(WindowEvent event) {
if (event.getWindow() == about) {
about.dispose();
return;
}
else System.exit(0);
}
}

 

[idarke]

Before we dive into this ... what problems are you having?

 

[M626]

Thanks, I figured it out... but thanks for responding.

 

[ringd]

To M626,

What was the problem, and what did you do to correct it?

Cheers,
Dave (JAVA newbe tobe)