MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CCombo;
import org.eclipse.swt.custom.TableEditor;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;

public class MainClass {

    public static void main(String[] a) {

        final Display d = new Display();
        final Shell shell = new Shell(d);

        shell.setSize(250, 200);

        shell.setLayout(new FillLayout());
        final int NUM = 5;

        final String[] options = { "Option 1", "Option 2", "Option 3" };

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

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

        TableEditor[] colorEditors = new TableEditor[NUM];

        Button[] colorButtons = new Button[NUM];

        for (int i = 0; i < NUM; i++) {
            final TableItem item = new TableItem(table, SWT.NONE);

            colorEditors[i] = new TableEditor(table);
            colorButtons[i] = new Button(table, SWT.PUSH);

            colorEditors[i].setEditor(colorButtons[i], item, 0);
        }

        final TableEditor editor = new TableEditor(table);
        editor.horizontalAlignment = SWT.LEFT;
        editor.grabHorizontal = true;

        table.addMouseListener(new MouseAdapter() {
            public void mouseDown(MouseEvent event) {
                Control old = editor.getEditor();
                if (old != null)
                    old.dispose();

                Point pt = new Point(event.x, event.y);

                final TableItem item = table.getItem(pt);
                if (item != null) {
                    int column = -1;
                    for (int i = 0, n = table.getColumnCount(); i < n; i++) {
                        Rectangle rect = item.getBounds(i);
                        if (rect.contains(pt)) {
                            column = i;
                            break;
                        }
                    }
                    if (column == 1) {
                        final CCombo combo = new CCombo(table, SWT.READ_ONLY);
                        for (int i = 0, n = options.length; i < n; i++) {
                            combo.add(options[i]);
                        }

                        combo.select(combo.indexOf(item.getText(column)));

                        editor.minimumWidth = combo.computeSize(SWT.DEFAULT, SWT.DEFAULT).x;
                        table.getColumn(column).setWidth(editor.minimumWidth);

                        combo.setFocus();
                        editor.setEditor(combo, item, column);

                    } else if (column > 1) {
                        final Text text = new Text(table, SWT.NONE);
                        text.setForeground(item.getForeground());

                        text.setText(item.getText(column));
                        text.setForeground(item.getForeground());
                        text.selectAll();
                        text.setFocus();

                        editor.minimumWidth = text.getBounds().width;

                        editor.setEditor(text, item, column);

                    }
                }
            }
        });

        shell.open();
        while (!shell.isDisposed()) {
            if (!d.readAndDispatch())
                d.sleep();
        }
        d.dispose();
    }
}