src/trigger.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * trigger.cpp
   4  *
   5  * Copyright 2007 Novell, Inc. (http://www.novell.com)
   6  *
   7  * See the LICENSE file included with the distribution for details.
   8  *
   9  */
  10
  11 #include <config.h>
  12
  13 #include "runtime.h"
  14 #include "trigger.h"
  15 #include "collection.h"
  16 #include "uielement.h"
  17
  18
  19 EventTrigger::EventTrigger ()
  20 {
  21         SetObjectType (Type::EVENTTRIGGER);
  22         registered_event_id = -1;
  23 }
  24
  25 EventTrigger::~EventTrigger ()
  26 {
  27 }
  28
  29 void
  30 EventTrigger::SetTarget (DependencyObject *target)
  31 {
  32         g_return_if_fail (target);
  33
  34 #if AT_SOME_POINT_SILVERLIGHT_GETS_ITS_HEAD_OUT_OF_ITS_
  35         const char *event = GetRoutedEvent ();
  36         const char *dot;
  37
  38         if (event && (dot = strchr (event, '.'))) {
  39                 char *type = g_strndup (event, dot-event);
  40                 const char *event_name = dot + 1;
  41
  42                 Type *event_type = Type::Find (type);
  43                 g_free (type);
  44
  45                 if (event_type) {
  46                         // event type has to exist
  47                         if (target->GetType()->IsSubclassOf (event_type->GetKind ())) {
  48                                 // the type of the target has
  49                                 // to be a subclass of the
  50                                 // event type for the event to
  51                                 // be available.
  52                                 registered_event_id = event_type->LookupEvent (event_name);
  53                         }
  54                 }
  55         } else if (event) {
  56                 registered_event_id = target->GetType ()->LookupEvent (event);
  57         }
  58 #else
  59         registered_event_id = UIElement::LoadedEvent;
  60 #endif
  61
  62         if (registered_event_id == -1)
  63                 g_warning ("failed to set target");
  64
  65         if (registered_event_id != -1)
  66                 target->AddHandler (registered_event_id, event_trigger_fire_actions, this);
  67 }
  68
  69 void
  70 EventTrigger::RemoveTarget (DependencyObject *target)
  71 {
  72         g_return_if_fail (target);
  73
  74         if (registered_event_id != -1) {
  75                 target->RemoveHandler (registered_event_id, event_trigger_fire_actions, this);
  76                 registered_event_id = -1;
  77         }
  78 }
  79
  80 void
  81 EventTrigger::event_trigger_fire_actions (EventObject *sender, EventArgs *calldata, gpointer closure)
  82 {
  83         EventTrigger *trigger = (EventTrigger *) closure;
  84
  85         g_return_if_fail (trigger);
  86
  87         TriggerActionCollection *actions = trigger->GetActions();
  88
  89         for (int i = 0; i < actions->GetCount (); i++) {
  90                 TriggerAction *action = actions->GetValueAt (i)->AsTriggerAction ();
  91                 action->Fire ();
  92         }
  93 }
  94
  95
  96 void
  97 event_trigger_action_add (EventTrigger *trigger, TriggerAction *action)
  98 {
  99         trigger->GetActions()->Add (action);
 100 }