CardPanel.java

package org.geogebra.web.html5.gui.util;

import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Widget;

public class CardPanel extends FlowPanel {
	private int selectedIndex;

	public CardPanel() {
		selectedIndex = 0;
	}

	public int getSelectedIndex() {
		return selectedIndex;
	}

	public void setSelectedIndex(int idx) {
		for (int i = 0; i < getWidgetCount(); i++) {
			getWidget(i).setVisible(i == idx);
		}
		selectedIndex = idx;
	}

	@Override
	public void add(Widget w) {
		// w.setVisible(false);
		super.add(w);
	}
}