package org.vaadin.hene.expandingtextarea.widgetset.client.ui;
   
   import org.vaadin.hene.expandingtextarea.ExpandingTextArea;
   import org.vaadin.hene.expandingtextarea.widgetset.client.ui.VExpandingTextArea.HeightChangedListener;
   
   import com.google.gwt.core.client.GWT;
   import com.google.gwt.core.client.Scheduler;
   import com.google.gwt.core.client.Scheduler.ScheduledCommand;
   import com.vaadin.client.ApplicationConnection;
  import com.vaadin.client.UIDL;
  import com.vaadin.client.communication.RpcProxy;
  import com.vaadin.v7.client.ui.VTextArea;
  import com.vaadin.v7.client.ui.textarea.TextAreaConnector;
  import com.vaadin.shared.ui.Connect;
  
  @Connect(ExpandingTextArea.class)
  public class ExpandingTextAreaConnector extends TextAreaConnector implements HeightChangedListener {
  
  	private ExpandingTextAreaServerRpc rpc = RpcProxy.create(ExpandingTextAreaServerRpc.class, this);
  
      private boolean sendRowsToServerWhenEnabled = false;
  
      @Override
      public void updateFromUIDL(UIDL uidl, ApplicationConnection client) {
          super.updateFromUIDL(uidl, client);
  
          if (uidl.hasAttribute("maxRows")) {
              getWidget().setMaxRows(uidl.getIntAttribute("maxRows"));
          } else {
          	getWidget().setMaxRows(null);
          }
  
          getWidget().addStyleName(VTextArea.CLASSNAME);
  
          Scheduler.get().scheduleDeferred(new ScheduledCommand() {
          	public void execute() {
          		getWidget().checkHeight();
          	}
          });
  
          if (sendRowsToServerWhenEnabled && isEnabled()) {
              rpc.setRows(getWidget().getRows());
              sendRowsToServerWhenEnabled = false;
          }
      }
  
      @Override
      protected void updateWidgetStyleNames() {
          super.updateWidgetStyleNames();
          getWidget().addStyleName(VExpandingTextArea.CLASSNAME);
      }
  
      @Override
      protected VExpandingTextArea createWidget() {
      	VExpandingTextArea widget = GWT.create(VExpandingTextArea.class);
      	widget.addHeightChangedListener(this);
          return widget;
      }
  
      @Override
      public VExpandingTextArea getWidget() {
          return (VExpandingTextArea) super.getWidget();
      }
  
  	public void heightChanged(int newHeight) {
          // Vaadin doesn't allow requests from disabled components.
          // If the component is disabled, set a flag to true so that row count
          // is transferred when component is enabled (see updateFromUIDL).
          if (isEnabled()) {
              rpc.setRows(newHeight);
          } else {
              sendRowsToServerWhenEnabled = true;
          }
  		getLayoutManager().setNeedsMeasure(this);
  	}
  
  }