Demonstrates TableCursor : Table « SWT JFace Eclipse « Java






Demonstrates TableCursor

Demonstrates TableCursor

//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.layout.*;
import org.eclipse.swt.widgets.*;

/**
 * This class demonstrates TableCursor
 */
public class TableCursorTest {
  // The number of rows and columns
  private static final int NUM = 5;

  /**
   * Runs the program
   */
  public void run() {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("Table Cursor Test");
    createContents(shell);
    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
    display.dispose();
  }

  /**
   * Creates the main window's contents
   * 
   * @param shell the main window
   */
  private void createContents(Shell shell) {
    shell.setLayout(new FillLayout());

    // Create the table
    final Table table = new Table(shell, SWT.SINGLE | SWT.FULL_SELECTION);
    table.setHeaderVisible(true);
    table.setLinesVisible(true);

    // Create the columns
    for (int i = 0; i < NUM; i++) {
      TableColumn column = new TableColumn(table, SWT.CENTER);
      column.setText("Column " + (i + 1));
      column.pack();
    }

    // Create the rows
    for (int i = 0; i < NUM; i++) {
      new TableItem(table, SWT.NONE);
    }

    // Create the TableCursor
    final TableCursor cursor = new TableCursor(table, SWT.NONE);

    // Create the editor
    // Use a ControlEditor, not a TableEditor, because the cursor is the parent
    final ControlEditor editor = new ControlEditor(cursor);
    editor.grabHorizontal = true;
    editor.grabVertical = true;

    // Add the event handling
    cursor.addSelectionListener(new SelectionAdapter() {
      // This is called as the user navigates around the table
      public void widgetSelected(SelectionEvent event) {
        // Select the row in the table where the TableCursor is
        table.setSelection(new TableItem[] { cursor.getRow()});
      }

      // This is called when the user hits Enter
      public void widgetDefaultSelected(SelectionEvent event) {
        // Begin an editing session
        // Notice that the parent of the Text is the TableCursor, not the Table
        final Text text = new Text(cursor, SWT.NONE);
        text.setFocus();

        // Copy the text from the cell to the Text
        text.setText(cursor.getRow().getText(cursor.getColumn()));
        text.setFocus();

        // Add a handler to detect key presses
        text.addKeyListener(new KeyAdapter() {
          public void keyPressed(KeyEvent event) {
            // End the editing and save the text if the user presses Enter
            // End the editing and throw away the text if the user presses Esc
            switch (event.keyCode) {
            case SWT.CR:
              cursor.getRow().setText(cursor.getColumn(), text.getText());
            case SWT.ESC:
              text.dispose();
              break;
            }
          }
        });
        editor.setEditor(text);
      }
    });
  }

  /**
   * The application entry point
   * 
   * @param args the command line arguments
   */
  public static void main(String[] args) {
    new TableCursorTest().run();
  }
}
           
       








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