Mega Code Archive
Demonstrates TableEditor
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//Send questions, comments, bug reports, etc. to the authors:
//Rob Warner (rwarner@interspatial.com)
//Robert Harris (rbrt_harris@yahoo.com)
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
/**
* This class demonstrates TableEditor.
*/
public class TextTableEditor {
// Number of rows and columns
private static final int NUM = 5;
// Colors for each row
private Color[] colors = new Color[NUM];
// Options for each dropdown
private String[] options = { "Option 1", "Option 2", "Option 3"};
/**
* Runs the application
*/
public void run() {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Text Table Editor");
createContents(shell);
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
// Dispose any created colors
for (int i = 0; i < NUM; i++) {
if (colors[i] != null) colors[i].dispose();
}
display.dispose();
}
/**
* Creates the main window's contents
*
* @param shell the main window
*/
private void createContents(final Shell shell) {
shell.setLayout(new FillLayout());
// Create the table
final Table table = new Table(shell, SWT.SINGLE | SWT.FULL_SELECTION
| SWT.HIDE_SELECTION);
table.setHeaderVisible(true);
table.setLinesVisible(true);
// Create five columns
for (int i = 0; i < NUM; i++) {
TableColumn column = new TableColumn(table, SWT.CENTER);
column.setText("Column " + (i + 1));
column.pack();
}
// Create five table editors for color
TableEditor[] colorEditors = new TableEditor[NUM];
// Create five buttons for changing color
Button[] colorButtons = new Button[NUM];
// Create five rows and the editors for those rows. The first column has the
// color change buttons. The second column has dropdowns. The final three
// have text fields.
for (int i = 0; i < NUM; i++) {
// Create the row
final TableItem item = new TableItem(table, SWT.NONE);
// Create the editor and button
colorEditors[i] = new TableEditor(table);
colorButtons[i] = new Button(table, SWT.PUSH);
// Set attributes of the button
colorButtons[i].setText("Color...");
colorButtons[i].computeSize(SWT.DEFAULT, table.getItemHeight());
// Set attributes of the editor
colorEditors[i].grabHorizontal = true;
colorEditors[i].minimumHeight = colorButtons[i].getSize().y;
colorEditors[i].minimumWidth = colorButtons[i].getSize().x;
// Set the editor for the first column in the row
colorEditors[i].setEditor(colorButtons[i], item, 0);
// Create a handler for the button
final int index = i;
colorButtons[i].addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
ColorDialog dialog = new ColorDialog(shell);
if (colors[index] != null) dialog.setRGB(colors[index].getRGB());
RGB rgb = dialog.open();
if (rgb != null) {
if (colors[index] != null) colors[index].dispose();
colors[index] = new Color(shell.getDisplay(), rgb);
item.setForeground(colors[index]);
}
}
});
}
// Create an editor object to use for text editing
final TableEditor editor = new TableEditor(table);
editor.horizontalAlignment = SWT.LEFT;
editor.grabHorizontal = true;
// Use a mouse listener, not a selection listener, since we're interested
// in the selected column as well as row
table.addMouseListener(new MouseAdapter() {
public void mouseDown(MouseEvent event) {
// Dispose any existing editor
Control old = editor.getEditor();
if (old != null) old.dispose();
// Determine where the mouse was clicked
Point pt = new Point(event.x, event.y);
// Determine which row was selected
final TableItem item = table.getItem(pt);
if (item != null) {
// Determine which column was selected
int column = -1;
for (int i = 0, n = table.getColumnCount(); i < n; i++) {
Rectangle rect = item.getBounds(i);
if (rect.contains(pt)) {
// This is the selected column
column = i;
break;
}
}
// Column 2 holds dropdowns
if (column == 1) {
// Create the dropdown and add data to it
final CCombo combo = new CCombo(table, SWT.READ_ONLY);
for (int i = 0, n = options.length; i < n; i++) {
combo.add(options[i]);
}
// Select the previously selected item from the cell
combo.select(combo.indexOf(item.getText(column)));
// Compute the width for the editor
// Also, compute the column width, so that the dropdown fits
editor.minimumWidth = combo.computeSize(SWT.DEFAULT, SWT.DEFAULT).x;
table.getColumn(column).setWidth(editor.minimumWidth);
// Set the focus on the dropdown and set into the editor
combo.setFocus();
editor.setEditor(combo, item, column);
// Add a listener to set the selected item back into the cell
final int col = column;
combo.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
item.setText(col, combo.getText());
// They selected an item; end the editing session
combo.dispose();
}
});
} else if (column > 1) {
// Create the Text object for our editor
final Text text = new Text(table, SWT.NONE);
text.setForeground(item.getForeground());
// Transfer any text from the cell to the Text control,
// set the color to match this row, select the text,
// and set focus to the control
text.setText(item.getText(column));
text.setForeground(item.getForeground());
text.selectAll();
text.setFocus();
// Recalculate the minimum width for the editor
editor.minimumWidth = text.getBounds().width;
// Set the control into the editor
editor.setEditor(text, item, column);
// Add a handler to transfer the text back to the cell
// any time it's modified
final int col = column;
text.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent event) {
// Set the text of the editor's control back into the cell
item.setText(col, text.getText());
}
});
}
}
}
});
}
/**
* The application entry point
*
* @param args the command line arguments
*/
public static void main(String[] args) {
new TextTableEditor().run();
}
}
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