public void setupDBFields(String dbname) throws Exception {
viewPane.setLayout(null);
Dimension dimView = sp.getSize();
int height = 0, width = 50;
viewPane.removeAll();
db = new DBF(dbname);
setTitle(dbname);
gb = new GridBagLayout();
gbc = new GridBagConstraints();
viewPane.setLayout(gb);
int i, j;
fldObjects = new Vector(db.getFieldCount());
for (i = 1; i <= db.getFieldCount(); i++) {
j = i - 1;
f = db.getField(i);
if (f.isMemoField() || f.isPictureField()) {
b = new Button(db.getField(i).getName());
b.addActionListener(this);
addComponent(
viewPane, b, 1, j, 1, 1, GridBagConstraints.HORIZONTAL, GridBagConstraints.EAST);
fldObjects.addElement(b);
} else if (f.getType() == 'L') {
c = new Checkbox(db.getField(i).getName(), true);
addComponent(
viewPane, c, 1, j, 1, 1, GridBagConstraints.HORIZONTAL, GridBagConstraints.EAST);
fldObjects.addElement(c);
} else {
l = new Label(db.getField(i).getName(), Label.RIGHT);
addComponent(
viewPane, l, 0, j, 1, 1, GridBagConstraints.HORIZONTAL, GridBagConstraints.EAST);
int ln = f.getLength();
if (ln > 100) {
ln = 100;
}
t = new TextField(db.getField(i).getName(), ln);
if (width < ln * 10) {
width = ln * 10;
}
addComponent(
viewPane, t, 1, j, ln, 1, GridBagConstraints.HORIZONTAL, GridBagConstraints.EAST);
fldObjects.addElement(t);
t.setEditable(true);
}
height += 10;
}
crl.setText("Record " + db.getCurrentRecordNumber());
trl.setText(" of " + db.getRecordCount());
SBrecpos.setMaximum(db.getRecordCount());
addComponent(viewPane, crl, 0, i, 1, 1, GridBagConstraints.HORIZONTAL, GridBagConstraints.EAST);
addComponent(viewPane, trl, 1, i, 1, 1, GridBagConstraints.HORIZONTAL, GridBagConstraints.EAST);
i++;
addComponent(
viewPane, SBrecpos, 0, i, 2, 1, GridBagConstraints.HORIZONTAL, GridBagConstraints.EAST);
addComponent(
viewPane, delCB, 2, i, 1, 1, GridBagConstraints.HORIZONTAL, GridBagConstraints.EAST);
i++;
addComponent(
viewPane, Prev, 0, i, 1, 1, GridBagConstraints.HORIZONTAL, GridBagConstraints.EAST);
addComponent(
viewPane, Next, 1, i, 1, 1, GridBagConstraints.HORIZONTAL, GridBagConstraints.EAST);
i++;
addComponent(viewPane, Add, 0, i, 1, 1, GridBagConstraints.HORIZONTAL, GridBagConstraints.EAST);
addComponent(
viewPane, Update, 1, i, 1, 1, GridBagConstraints.HORIZONTAL, GridBagConstraints.EAST);
addComponent(
viewPane, Clear, 2, i, 1, 1, GridBagConstraints.HORIZONTAL, GridBagConstraints.EAST);
Prev.setEnabled(false);
prevRecord.setEnabled(false);
if (db.getRecordCount() == 0) {
Update.setEnabled(false);
updateRecord.setEnabled(false);
Next.setEnabled(false);
nextRecord.setEnabled(false);
}
dimView.setSize(width + 150, height + 150);
sp.setSize(dimView);
goTo(1);
}
/** Create the whole GUI, and set up event listeners */
public AllComponents(String title) {
super(title); // set frame title.
// Arrange to detect window close events
this.addWindowListener(
new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
// Set a default font
this.setFont(new Font("SansSerif", Font.PLAIN, 12));
// Create the menubar. Tell the frame about it.
MenuBar menubar = new MenuBar();
this.setMenuBar(menubar);
// Create the file menu. Add to menubar.
Menu file = new Menu("File");
menubar.add(file);
// Create two items for the file menu, setting their label, shortcut,
// action command and listener. Add them to File menu.
// Note that we use the frame itself as the action listener
MenuItem open = new MenuItem("Open", new MenuShortcut(KeyEvent.VK_O));
open.setActionCommand("open");
open.addActionListener(this);
file.add(open);
MenuItem quit = new MenuItem("Quit", new MenuShortcut(KeyEvent.VK_Q));
quit.setActionCommand("quit");
quit.addActionListener(this);
file.add(quit);
// Create Help menu; add an item; add to menubar
// Display the help menu in a special reserved place.
Menu help = new Menu("Help");
menubar.add(help);
menubar.setHelpMenu(help);
// Create and add an item to the Help menu
MenuItem about = new MenuItem("About", new MenuShortcut(KeyEvent.VK_A));
about.setActionCommand("about");
about.addActionListener(this);
help.add(about);
// Now that we've done the menu, we can begin work on the contents of
// the frame. Assign a BorderLayout manager with margins for this frame.
this.setLayout(new BorderLayout(10, 10));
// Create two panels to contain two columns of components. Use our custom
// ColumnLayout layout manager for each. Add them on the west and
// center of the frame's border layout
Panel column1 = new Panel();
column1.setLayout(new ColumnLayout(5, 10, 2, ColumnLayout.LEFT));
this.add(column1, "West");
Panel column2 = new Panel();
column2.setLayout(new ColumnLayout(5, 10, 2, ColumnLayout.LEFT));
this.add(column2, "Center");
// Create a panel to contain the buttons at the bottom of the window
// Give it a FlowLayout layout manager, and add it along the south border
Panel buttonbox = new Panel();
buttonbox.setLayout(new FlowLayout(FlowLayout.CENTER, 100, 10));
this.add(buttonbox, "South");
// Create pushbuttons and add them to the buttonbox
Button okay = new Button("Okay");
Button cancel = new Button("Cancel");
buttonbox.add(okay);
buttonbox.add(cancel);
// Handle events on the buttons
ActionListener buttonlistener =
new ActionListener() {
public void actionPerformed(ActionEvent e) {
textarea.append("You clicked: " + ((Button) e.getSource()).getLabel() + "\n");
}
};
okay.addActionListener(buttonlistener);
cancel.addActionListener(buttonlistener);
// Now start filling the left column.
// Create a 1-line text field and add to left column, with a label
TextField textfield = new TextField(15);
column1.add(new Label("Name:"));
column1.add(textfield);
// Handle events on the TextField
textfield.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
textarea.append("Your name is: " + ((TextField) e.getSource()).getText() + "\n");
}
});
textfield.addTextListener(
new TextListener() {
public void textValueChanged(TextEvent e) {
textarea.append("You have typed: " + ((TextField) e.getSource()).getText() + "\n");
}
});
// Create a dropdown list or option menu of choices
Choice choice = new Choice();
choice.addItem("red");
choice.addItem("green");
choice.addItem("blue");
column1.add(new Label("Favorite color:"));
column1.add(choice);
// Handle events on this choice
choice.addItemListener(
new ItemListener() {
public void itemStateChanged(ItemEvent e) {
textarea.append("Your favorite color is: " + e.getItem() + "\n");
}
});
// Create checkboxes, and group them in a CheckboxGroup to give them
// "radio button" behavior.
CheckboxGroup checkbox_group = new CheckboxGroup();
Checkbox[] checkboxes = new Checkbox[3];
checkboxes[0] = new Checkbox("vanilla", checkbox_group, false);
checkboxes[1] = new Checkbox("chocolate", checkbox_group, true);
checkboxes[2] = new Checkbox("strawberry", checkbox_group, false);
column1.add(new Label("Favorite flavor:"));
for (int i = 0; i < checkboxes.length; i++) column1.add(checkboxes[i]);
// Handle events on the checkboxes
ItemListener checkbox_listener =
new ItemListener() {
public void itemStateChanged(ItemEvent e) {
textarea.append(
"Your favorite flavor is: " + ((Checkbox) e.getItemSelectable()).getLabel() + "\n");
}
};
for (int i = 0; i < checkboxes.length; i++) checkboxes[i].addItemListener(checkbox_listener);
// Create a list of choices.
List list = new List(4, true);
list.addItem("Java");
list.addItem("C");
list.addItem("C++");
list.addItem("Smalltalk");
list.addItem("Lisp");
list.addItem("Modula-3");
list.addItem("Forth");
column1.add(new Label("Favorite languages:"));
column1.add(list);
// Handle events on this list
list.addItemListener(
new ItemListener() {
public void itemStateChanged(ItemEvent e) {
textarea.append("Your favorite languages are: ");
String[] languages = ((List) e.getItemSelectable()).getSelectedItems();
for (int i = 0; i < languages.length; i++) {
if (i > 0) textarea.append(",");
textarea.append(languages[i]);
}
textarea.append("\n");
}
});
// Create a multi-line text area in column 2
textarea = new TextArea(6, 40);
textarea.setEditable(false);
column2.add(new Label("Messages"));
column2.add(textarea);
// Create a scrollpane that displays portions of a larger component
ScrollPane scrollpane = new ScrollPane();
scrollpane.setSize(300, 150);
column2.add(new Label("Scrolling Window"));
column2.add(scrollpane);
// Create a custom MultiLineLabel with a really big font and make it
// a child of the ScrollPane container
String message =
"/*************************************************\n"
+ " * AllComponents.java *\n"
+ " * Written by David Flanagan *\n"
+ " * Copyright (c) 1997 by O'Reilly & Associates *\n"
+ " * *\n"
+ " *************************************************/\n";
MultiLineLabel biglabel = new MultiLineLabel(message);
biglabel.setFont(new Font("Monospaced", Font.BOLD + Font.ITALIC, 24));
scrollpane.add(biglabel);
}
