¿Cómo puedo saber qué eventos se disparan desde GXT?

Question

Parece que no puedo encontrar ninguna documentación de qué eventos se disparan y cuándo en GXT.

Los documentos API tienen listas de todos los eventos que podrían desencadenarse (en Events). Y describe cómo manejar eventos que capturas. Pero estoy interesado en el lado opuesto, que eventos se disparan cuando tomo cierta acción.

Puedo configurar algunos oyentes para diferentes componentes, o puedo usar addListener con un código de evento específico para detectar eventos individuales. Eso es irregular, y parece que estoy usando prueba y error para adivinar lo que podría querer atrapar.

¿Hay alguna forma de registrar todos los eventos que se activan? ¿O atraparlos a todos para poder verlos en un depurador?

¿O hay alguna documentación que me falta que tenga la información? Algo similar a "cuando hace clic en un widget, se dispara ButtonEvent. Events.x se activa en el control deslizante, Events.y en el clic".

Answer 1

Terminé usando la fuerza bruta: creó un mapa de EventType y el nombre, a continuación, adjuntar un oyente para cada tipo de evento que el componente podría recibir. Luego, establecí un punto de interrupción dentro del Oyente, y pude ver qué eventos se recibieron cuando sucedió algo.

Si no hubiera sido un código descartable, lo habría limpiado en una clase de utilidad, no habría usado una clase de Escucha anónima, etc.

final Map<EventType, String> eventTypeNames = new HashMap<EventType, String>(); 
    eventTypeNames.put(Events.BeforeExpand, "BeforeExpand"); 
    eventTypeNames.put(Events.Expand, "Expand"); 
    ... 
    eventTypeNames.put(Events.BeforeStateSave, "BeforeStateSave"); 
    eventTypeNames.put(Events.StateSave, "StateSave"); 

    for (EventType eventType : Arrays.asList(
      Events.BeforeExpand, 
      Events.Expand, 
      ... 
      Events.BeforeStateSave, 
      Events.StateSave 
    )) { 
     this.addListener(eventType, new Listener<BaseEvent>() { 
      public void handleEvent(final BaseEvent be) { 
       String type = eventTypeNames.get(be.getType()); 
       String ev = be.toString(); 
      } 
     }); 
    } 

Answer 2

Los documentos API para los diversos widgets describen qué eventos se dispararán y cuándo se dispararán. Por ejemplo, supongamos que queríamos realizar una acción cada vez que un usuario elige un nuevo TabItem en un TabPanel.

TabPanel La documentación de la API (que se encuentra en http://extjs.com/deploy/gxtdocs/com/extjs/gxt/ui/client/widget/TabPanel.html) muestra varios eventos; estamos interesados ​​en Select:

Seleccionar: se selecciona

dispara al cabo del artículo TabPanelEvent (contenedor, elemento).

• container:
• elemento: el elemento seleccionado

Así, para capturar el evento (que aparece a entender, pero voy a incluir por el bien integridad) del proceso consiste en añadir un oyente a la TabPanel, observando específicamente para el evento Events.Select:

tp.addListener(Events.Select, new Listener<TabPanelEvent>(){ 
    public void handleEvent(TabPanelEvent be) 
    { 
    MessageBox.alert("Test", be.item.getText(), null); 
    } 
}); 

Tenga en cuenta que muchos eventos tienen una propiedad llamada doit que puede establecer en falso para cancelar el evento.

Una lista completa de código:

package edu.fresno.client; 

import com.extjs.gxt.ui.client.Events; 
import com.extjs.gxt.ui.client.event.Listener; 
import com.extjs.gxt.ui.client.event.TabPanelEvent; 
import com.extjs.gxt.ui.client.widget.ContentPanel; 
import com.extjs.gxt.ui.client.widget.MessageBox; 
import com.extjs.gxt.ui.client.widget.TabItem; 
import com.extjs.gxt.ui.client.widget.TabPanel; 
import com.extjs.gxt.ui.client.widget.layout.FitLayout; 
import com.google.gwt.core.client.EntryPoint; 
import com.google.gwt.user.client.ui.RootPanel; 

public class GWTSandbox implements EntryPoint { 
    public void onModuleLoad() { 

     TabPanel tp = new TabPanel(); 

     TabItem ti1 = new TabItem("TabItem1"); 
     TabItem ti2 = new TabItem("TabItem2"); 

     tp.add(ti1); 
     tp.add(ti2); 

     tp.addListener(Events.Select, new Listener<TabPanelEvent>(){ 
      public void handleEvent(TabPanelEvent be) 
      { 
       MessageBox.alert("Test", be.item.getText(), null); 
      } 
     }); 


     ContentPanel panel = new ContentPanel(); 
     panel.setLayout(new FitLayout()); 
     panel.add(tp); 
     RootPanel.get().add(panel); 

    } 
} 

Answer 3

Se podría añadir siguiente código para el constructor:

ContentPanel panel =new ContentPanel(){ 
     public boolean fireEvent(EventType type) { 
      System.out.println(type.getEventCode()); 
      return super.fireEvent(type); 
     } 
     public boolean fireEvent(EventType eventType, BaseEvent be) { 
      System.out.println(eventType.getEventCode()); 
      return super.fireEvent(eventType, be); 
     } 
     public boolean fireEvent(EventType type, ComponentEvent ce) { 
      System.out.println(type.getEventCode()); 
      return super.fireEvent(type, ce); 
     } 
    }; 

entonces se imprimirá todo caso, este componente puede recibir.

Answer 4

Tal vez alguien lo encuentre útil, he creado una clase de utilidad para ver qué tipo de eventos se han levantado. La idea de curso fue propuesta en una respuesta aceptada.

import java.util.HashMap; 
import java.util.Map; 

import com.extjs.gxt.ui.client.event.BaseEvent; 
import com.extjs.gxt.ui.client.event.EventType; 
import com.extjs.gxt.ui.client.event.Events; 
import com.extjs.gxt.ui.client.event.Listener; 
import com.extjs.gxt.ui.client.widget.Component; 

/** 
* Class for debugging purposes. Sometimes it is hard to tell what type of event 
* is invoked and when. During debug process you can just do: 
* 
* EventUtils.attachDebugListeners(c); 
* EventUtils.attachDebugListeners(c, "NAME"); 
* 
* You'll then get information about events as they are invoked. 
* 
* List of events copied from {@link Events} class. 
* 
*/ 
public class EventUtils { 

    public static void attachDebugListeners(final Component c) { 
     attachDebugListeners(c, null); 
    } 

    public static void attachDebugListeners(final Component c, final String msg) { 
     for (final EventType type : eventTypeNames.keySet()) { 
      c.addListener(type, new Listener<BaseEvent>() { 
       @Override 
       public void handleEvent(BaseEvent be) { 
        String typeName = eventTypeNames.get(type); 
        if (msg != null) 
         System.out.print(msg + " -> "); 
        System.out.println(typeName); 
       } 
      }); 
     } 
    } 

    final static Map<EventType, String> eventTypeNames = new HashMap<EventType, String>(); 
    static { 
     eventTypeNames.put(Events.Activate, "Events.Activate"); 
     eventTypeNames.put(Events.Add, "Events.Add"); 
     eventTypeNames.put(Events.Adopt, "Events.Adopt"); 
     eventTypeNames.put(Events.AfterEdit, "Events.AfterEdit"); 
     eventTypeNames.put(Events.AfterLayout, "Events.AfterLayout"); 
     eventTypeNames.put(Events.ArrowClick, "Events.ArrowClick"); 
     eventTypeNames.put(Events.Attach, "Events.Attach"); 
     eventTypeNames.put(Events.AutoHide, "Events.AutoHide"); 
     eventTypeNames.put(Events.BeforeAdd, "Events.BeforeAdd"); 
     eventTypeNames.put(Events.BeforeAdopt, "Events.BeforeAdopt"); 
     eventTypeNames.put(Events.BeforeBind, "Events.BeforeBind"); 
     eventTypeNames.put(Events.BeforeCancelEdit, "Events.BeforeCancelEdit"); 
     eventTypeNames.put(Events.BeforeChange, "Events.BeforeChange"); 
     eventTypeNames 
       .put(Events.BeforeCheckChange, "Events.BeforeCheckChange"); 
     eventTypeNames.put(Events.BeforeClose, "Events.BeforeClose"); 
     eventTypeNames.put(Events.BeforeCollapse, "Events.BeforeCollapse"); 
     eventTypeNames.put(Events.BeforeComplete, "Events.BeforeComplete"); 
     eventTypeNames.put(Events.BeforeEdit, "Events.BeforeEdit"); 
     eventTypeNames.put(Events.BeforeExpand, "Events.BeforeExpand"); 
     eventTypeNames.put(Events.BeforeHide, "Events.BeforeHide"); 
     eventTypeNames.put(Events.BeforeLayout, "Events.BeforeLayout"); 
     eventTypeNames.put(Events.BeforeOpen, "Events.BeforeOpen"); 
     eventTypeNames.put(Events.BeforeOrphan, "Events.BeforeOrphan"); 
     eventTypeNames.put(Events.BeforeQuery, "Events.BeforeQuery"); 
     eventTypeNames.put(Events.BeforeRemove, "Events.BeforeRemove"); 
     eventTypeNames.put(Events.BeforeRender, "Events.BeforeRender"); 
     eventTypeNames.put(Events.BeforeSelect, "Events.BeforeSelect"); 
     eventTypeNames.put(Events.BeforeShow, "Events.BeforeShow"); 
     eventTypeNames.put(Events.BeforeStartEdit, "Events.BeforeStartEdit"); 
     eventTypeNames.put(Events.BeforeStateRestore, 
       "Events.BeforeStateRestore"); 
     eventTypeNames.put(Events.BeforeStateSave, "Events.BeforeStateSave"); 
     eventTypeNames.put(Events.BeforeSubmit, "Events.BeforeSubmit"); 
     eventTypeNames.put(Events.Bind, "Events.Bind"); 
     eventTypeNames.put(Events.Blur, "Events.Blur"); 
     eventTypeNames.put(Events.BodyScroll, "Events.BodyScroll"); 
     eventTypeNames.put(Events.BrowserEvent, "Events.BrowserEvent"); 
     eventTypeNames.put(Events.CancelEdit, "Events.CancelEdit"); 
     eventTypeNames.put(Events.CellClick, "Events.CellClick"); 
     eventTypeNames.put(Events.CellDoubleClick, "Events.CellDoubleClick"); 
     eventTypeNames.put(Events.CellMouseDown, "Events.CellMouseDown"); 
     eventTypeNames.put(Events.CellMouseUp, "Events.CellMouseUp"); 
     eventTypeNames.put(Events.Change, "Events.Change"); 
     eventTypeNames.put(Events.CheckChange, "Events.CheckChange"); 
     eventTypeNames.put(Events.CheckChanged, "Events.CheckChanged"); 
     eventTypeNames.put(Events.Clear, "Events.Clear"); 
     eventTypeNames.put(Events.Close, "Events.Close"); 
     eventTypeNames.put(Events.Collapse, "Events.Collapse"); 
     eventTypeNames.put(Events.ColumnClick, "Events.ColumnClick"); 
     eventTypeNames.put(Events.ColumnResize, "Events.ColumnResize"); 
     eventTypeNames.put(Events.Complete, "Events.Complete"); 
     eventTypeNames.put(Events.ContextMenu, "Events.ContextMenu"); 
     eventTypeNames.put(Events.Deactivate, "Events.Deactivate"); 
     eventTypeNames.put(Events.Detach, "Events.Detach"); 
     eventTypeNames.put(Events.Disable, "Events.Disable"); 
     eventTypeNames.put(Events.DoubleClick, "Events.DoubleClick"); 
     eventTypeNames.put(Events.DragCancel, "Events.DragCancel"); 
     eventTypeNames.put(Events.DragEnd, "Events.DragEnd"); 
     eventTypeNames.put(Events.DragEnter, "Events.DragEnter"); 
     eventTypeNames.put(Events.DragFail, "Events.DragFail"); 
     eventTypeNames.put(Events.DragLeave, "Events.DragLeave"); 
     eventTypeNames.put(Events.DragMove, "Events.DragMove"); 
     eventTypeNames.put(Events.DragStart, "Events.DragStart"); 
     eventTypeNames.put(Events.Drop, "Events.Drop"); 
     eventTypeNames.put(Events.EffectCancel, "Events.EffectCancel"); 
     eventTypeNames.put(Events.EffectComplete, "Events.EffectComplete"); 
     eventTypeNames.put(Events.EffectStart, "Events.EffectStart"); 
     eventTypeNames.put(Events.Enable, "Events.Enable"); 
     eventTypeNames.put(Events.Exception, "Events.Exception"); 
     eventTypeNames.put(Events.Expand, "Events.Expand"); 
     eventTypeNames.put(Events.Focus, "Events.Focus"); 
     eventTypeNames.put(Events.HeaderChange, "Events.HeaderChange"); 
     eventTypeNames.put(Events.HeaderClick, "Events.HeaderClick"); 
     eventTypeNames 
       .put(Events.HeaderContextMenu, "Events.HeaderContextMenu"); 
     eventTypeNames 
       .put(Events.HeaderDoubleClick, "Events.HeaderDoubleClick"); 
     eventTypeNames.put(Events.HeaderMouseDown, "Events.HeaderMouseDown"); 
     eventTypeNames.put(Events.HiddenChange, "Events.HiddenChange"); 
     eventTypeNames.put(Events.Hide, "Events.Hide"); 
     eventTypeNames.put(Events.Invalid, "Events.Invalid"); 
     eventTypeNames.put(Events.KeyDown, "Events.KeyDown"); 
     eventTypeNames.put(Events.KeyPress, "Events.KeyPress"); 
     eventTypeNames.put(Events.KeyUp, "Events.KeyUp"); 
     eventTypeNames.put(Events.LiveGridViewUpdate, 
       "Events.LiveGridViewUpdate"); 
     eventTypeNames.put(Events.Maximize, "Events.Maximize"); 
     eventTypeNames.put(Events.MenuHide, "Events.MenuHide"); 
     eventTypeNames.put(Events.MenuShow, "Events.MenuShow"); 
     eventTypeNames.put(Events.Minimize, "Events.Minimize"); 
     eventTypeNames.put(Events.Move, "Events.Move"); 
     eventTypeNames.put(Events.OnBlur, "Events.OnBlur"); 
     eventTypeNames.put(Events.OnChange, "Events.OnChange"); 
     eventTypeNames.put(Events.OnClick, "Events.OnClick"); 
     eventTypeNames.put(Events.OnContextMenu, "Events.OnContextMenu"); 
     eventTypeNames.put(Events.OnDoubleClick, "Events.OnDoubleClick"); 
     eventTypeNames.put(Events.OnError, "Events.OnError"); 
     eventTypeNames.put(Events.OnFocus, "Events.OnFocus"); 
     eventTypeNames.put(Events.OnKeyDown, "Events.OnKeyDown"); 
     eventTypeNames.put(Events.OnKeyPress, "Events.OnKeyPress"); 
     eventTypeNames.put(Events.OnKeyUp, "Events.OnKeyUp"); 
     eventTypeNames.put(Events.OnLoad, "Events.OnLoad"); 
     eventTypeNames.put(Events.OnLoseCapture, "Events.OnLoseCapture"); 
     eventTypeNames.put(Events.OnMouseDown, "Events.OnMouseDown"); 
     eventTypeNames.put(Events.OnMouseMove, "Events.OnMouseMove"); 
     eventTypeNames.put(Events.OnMouseOut, "Events.OnMouseOut"); 
     eventTypeNames.put(Events.OnMouseOver, "Events.OnMouseOver"); 
     eventTypeNames.put(Events.OnMouseUp, "Events.OnMouseUp"); 
     eventTypeNames.put(Events.OnMouseWheel, "Events.OnMouseWheel"); 
     eventTypeNames.put(Events.OnScroll, "Events.OnScroll"); 
     eventTypeNames.put(Events.Open, "Events.Open"); 
     eventTypeNames.put(Events.Orphan, "Events.Orphan"); 
     eventTypeNames.put(Events.Ready, "Events.Ready"); 
     eventTypeNames.put(Events.Refresh, "Events.Refresh"); 
     eventTypeNames.put(Events.Register, "Events.Register"); 
     eventTypeNames.put(Events.Remove, "Events.Remove"); 
     eventTypeNames.put(Events.Render, "Events.Render"); 
     eventTypeNames.put(Events.Resize, "Events.Resize"); 
     eventTypeNames.put(Events.ResizeEnd, "Events.ResizeEnd"); 
     eventTypeNames.put(Events.ResizeStart, "Events.ResizeStart"); 
     eventTypeNames.put(Events.Restore, "Events.Restore"); 
     eventTypeNames.put(Events.RowClick, "Events.RowClick"); 
     eventTypeNames.put(Events.RowDoubleClick, "Events.RowDoubleClick"); 
     eventTypeNames.put(Events.RowMouseDown, "Events.RowMouseDown"); 
     eventTypeNames.put(Events.RowMouseUp, "Events.RowMouseUp"); 
     eventTypeNames.put(Events.RowUpdated, "Events.RowUpdated"); 
     eventTypeNames.put(Events.Scroll, "Events.Scroll"); 
     eventTypeNames.put(Events.Select, "Events.Select"); 
     eventTypeNames.put(Events.SelectionChange, "Events.SelectionChange"); 
     eventTypeNames.put(Events.Show, "Events.Show"); 
     eventTypeNames.put(Events.SortChange, "Events.SortChange"); 
     eventTypeNames.put(Events.SpecialKey, "Events.SpecialKey"); 
     eventTypeNames.put(Events.StartEdit, "Events.StartEdit"); 
     eventTypeNames.put(Events.StateChange, "Events.StateChange"); 
     eventTypeNames.put(Events.StateRestore, "Events.StateRestore"); 
     eventTypeNames.put(Events.StateSave, "Events.StateSave"); 
     eventTypeNames.put(Events.Submit, "Events.Submit"); 
     eventTypeNames.put(Events.Toggle, "Events.Toggle"); 
     eventTypeNames.put(Events.TriggerClick, "Events.TriggerClick"); 
     eventTypeNames.put(Events.TwinTriggerClick, "Events.TwinTriggerClick"); 
     eventTypeNames.put(Events.UnBind, "Events.UnBind"); 
     eventTypeNames.put(Events.Unregister, "Events.Unregister"); 
     eventTypeNames.put(Events.Update, "Events.Update"); 
     eventTypeNames.put(Events.Valid, "Events.Valid"); 
     eventTypeNames.put(Events.ValidateDrop, "Events.ValidateDrop"); 
     eventTypeNames.put(Events.ValidateEdit, "Events.ValidateEdit"); 
     eventTypeNames.put(Events.ViewReady, "Events.ViewReady"); 
    } 
}