import java.util.ArrayList;
import java.util.List;

import org.zkoss.bind.BindUtils;
import org.zkoss.bind.annotation.AfterCompose;
import org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.ContextParam;
import org.zkoss.bind.annotation.ContextType;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.select.Selectors;
import org.zkoss.zul.DefaultTreeModel;
import org.zkoss.zul.DefaultTreeNode;
import org.zkoss.zul.TreeNode;


public class DynColTreeVM {

  @AfterCompose
  public void afterCompose(@ContextParam(ContextType.VIEW) Component view) {
    Selectors.wireComponents(view, this, false);
  }

  public DefaultTreeModel<String> getTreeModel() {
    List<DefaultTreeNode<String>> children = new ArrayList<DefaultTreeNode<String>>();
    TreeNode<String> root = new DefaultTreeNode<String>("root", children);
    for (int i = 0; i < 10; i++) {
      root.getChildren().add(new DefaultTreeNode<String>("c" + i));
    }
    DefaultTreeModel<String> model = new DefaultTreeModel<String>(root);

    return model;
  }

  public List<String> getCols() {
    List<String> result = new ArrayList<String>();
    result.add("col_1");
    result.add("col_2");
    result.add("col_3");
    return result;
  }

  public List<String> getItems() {
    List<String> result = new ArrayList<String>();
    result.add("item_1");
    result.add("item_2");
    result.add("item_3");
    return result;
  }

  @Command
  public void doSomething() {
    BindUtils.postNotifyChange(null, null, this, "cols");
  }

  public boolean isVisible(String name) {
    return true;
//     return name.indexOf("_2") == -1;
  }
}