Preliminary support for accessing named events through a Transform method

Charles Otto
1 parent 4c0fea7e
Showing 4 changed files with 65 additions and 0 deletions
openbr/openbr_plugin.h
openbr/plugins/meta.cpp
openbr/plugins/misc.cpp
openbr/plugins/openbr_internal.h
@@ -1040,6 +1040,21 @@ private:
  *  @{
  */
  
+class TemplateEvent : public QObject
+{
+    Q_OBJECT
+
+public:
+    void pulseSignal(const Template & output) const
+    {
+        emit theSignal(output);
+    }
+
+signals:
+    void theSignal(const Template & output) const;
+};
+
+
 /*!
  * \brief Plugin base class for processing a template.
  *
@@ -1144,6 +1159,15 @@ public:
      */
     virtual Transform * smartCopy() { return this;}
  
+    /*!
+     * \brief Recursively retrieve a named event, returns NULL if an event is not found.
+     */
+    virtual TemplateEvent * getEvent(const QString & name)
+    {
+        (void) name;
+        return NULL;
+    }
+
 protected:
     Transform(bool independent = true, bool trainable = true); /*!< \brief Construct a transform. */
     inline Transform *make(const QString &description) { return make(description, this); } /*!< \brief Make a subtransform. */
@@ -615,6 +615,12 @@ public:
         return output;
     }
  
+    virtual TemplateEvent * getEvent(const QString & name)
+    {
+        return transform->getEvent(name);
+    }
+
+
     void train(const TemplateList &data)
     {
         transform->train(data);
@@ -562,6 +562,28 @@ class ExpandRectTransform : public UntrainableTransform
  
 BR_REGISTER(Transform, ExpandRectTransform)
  
+
+class EventTransform : public UntrainableMetaTransform
+{
+    Q_OBJECT
+    Q_PROPERTY(QString eventName READ get_eventName WRITE set_eventName RESET reset_eventName STORED false)
+    BR_PROPERTY(QString, eventName, "")
+
+    TemplateEvent event;
+
+    void project(const Template &src, Template &dst) const
+    {
+        dst = src;
+        event.pulseSignal(dst);
+    }
+
+    TemplateEvent * getEvent(const QString & name)
+    {
+        return name == eventName ? &event : NULL;
+    }
+};
+BR_REGISTER(Transform, EventTransform)
+
 }
  
 #include "misc.moc"
@@ -234,6 +234,19 @@ public:
         return output;
     }
  
+    virtual TemplateEvent * getEvent(const QString & name)
+    {
+        foreach(Transform* t, transforms )
+        {
+            TemplateEvent * probe = t->getEvent(name);
+            if (probe)
+                return probe;
+        }
+
+        return NULL;
+    }
+
+
 protected:
     bool isTimeVarying;