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| 17. 18. 5. Add events to Text: MouseDown, MouseMove, MouseUp, KeyDown, KeyUp Resize |
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import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.ScrollBar;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class TextEventMouseDownMoveUpKey {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
final Text text = new Text(shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
for (int i = 0; i < 100; i++) {
text.append(i + "\n");
}
text.setSelection(0);
Listener listener = new Listener() {
int lastIndex = text.getTopIndex();
public void handleEvent(Event e) {
int index = text.getTopIndex();
if (index != lastIndex) {
lastIndex = index;
System.out.println("Scrolled, topIndex=" + index);
}
}
};
/* NOTE: Only detects scrolling by the user */
text.addListener(SWT.MouseDown, listener);
text.addListener(SWT.MouseMove, listener);
text.addListener(SWT.MouseUp, listener);
text.addListener(SWT.KeyDown, listener);
text.addListener(SWT.KeyUp, listener);
text.addListener(SWT.Resize, listener);
shell.pack();
Point size = shell.computeSize(SWT.DEFAULT, SWT.DEFAULT);
shell.setSize(size.x - 32, size.y / 2);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
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