我想在 RoundedRectangle 中添加一个滚动条。我在根图中有 3 个圆角矩形。现在我想为每个圆角矩形添加滚动条。是否可以将滚动条添加到圆角矩形或矩形图形?我使用了以下方式。但它没有向我显示任何数字。如何让它发挥作用?在下面的示例中,我只添加了一个矩形。
import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.Figure;
import org.eclipse.draw2d.FigureCanvas;
import org.eclipse.draw2d.LightweightSystem;
import org.eclipse.draw2d.RoundedRectangle;
import org.eclipse.draw2d.ScrollPane;
import org.eclipse.draw2d.XYLayout;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class RoundedRectangleTest {
public static void main(String args[]) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
shell.setText("Scrollpane Example");
// Create a root figure and simple layout to contain all other figures
Figure root = new Figure();
root.setFont(shell.getFont());
root.setLayoutManager(new XYLayout());
ScrollPane scrollPane = new ScrollPane();
RoundedRectangle r = new RoundedRectangle();
r.setBackgroundColor(ColorConstants.yellow);
Rectangle rect = new Rectangle(10, 10, 50, 50);
r.setBounds(rect);
scrollPane.setContents(r);
root.add(scrollPane);
FigureCanvas canvas = new FigureCanvas(shell, SWT.DOUBLE_BUFFERED);
canvas.setBackground(ColorConstants.white);
//canvas.setContents(scrollPane);
LightweightSystem lws = new LightweightSystem(canvas);
lws.setContents(root);
shell.setSize(400, 350);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}