improve call selection

There were corner cases that did not trigger the call view, or with
an invalid selected call.
Improves call switching by properly changing the call selected when
an incoming call arrives and disconnecting the preivous one.

Change-Id: I32db7c9e6bc4a2df45544ddb7fad5e344d8839d7
Tuleap: #70

src/CurrentCallVC.mm

@@ -96,6 +96,7 @@
 @property RendererConnectionsHolder* previewHolder;
 @property RendererConnectionsHolder* videoHolder;
 @property QMetaObject::Connection videoStarted;
+@property QMetaObject::Connection selectedCallChanged;
 @property QMetaObject::Connection messageConnection;
 @property QMetaObject::Connection mediaAddedConnection;
 
@@ -248,7 +249,7 @@
                              return;
                          }
 
-                         CallModel::instance().selectCall(call);
+                         [self changeCallSelection:call];
 
                          if (call->state() == Call::State::HOLD) {
                              call << Call::Action::HOLD;
@@ -281,7 +282,25 @@
                                  [self updateCall];
                              }
                          }
-    });
+                     });
+
+    QObject::connect(&CallModel::instance(),
+                     &CallModel::incomingCall,
+                     [self](Call* c) {
+                         [self changeCallSelection:c];
+                         [self animateIn];
+                     });
+}
+
+- (void) changeCallSelection:(Call* )c
+{
+    QObject::disconnect(self.selectedCallChanged);
+    CallModel::instance().selectCall(c);
+    self.selectedCallChanged = QObject::connect(CallModel::instance().selectedCall(),
+                                                &Call::changed,
+                                                [=]() {
+                                                    [self updateCall];
+                                                });
 }
 
 - (void) monitorIncomingTextMessages:(Media::Text*) media
@@ -424,7 +443,6 @@
 
 -(void) animateIn
 {
-    NSLog(@"animateIn");
     CGRect frame = CGRectOffset(self.view.superview.bounds, -self.view.superview.bounds.size.width, 0);
     [self.view setHidden:NO];
 
@@ -444,11 +462,8 @@
         if(!CallModel::instance().selectedCall())
             return;
 
-        QObject::connect(CallModel::instance().selectedCall(),
-                            &Call::changed,
-                            [=]() {
-                                [self updateCall];
-                            });
+        [self updateCall];
+
         if (CallModel::instance().selectedCall()->hasMedia(Media::Media::Type::TEXT, Media::Media::Direction::IN)) {
             Media::Text *text = CallModel::instance().selectedCall()->firstMedia<Media::Text>(Media::Media::Direction::IN);
             [self monitorIncomingTextMessages:text];