Merge pull request #70 from biometrics/events

Something like this

Merge pull request #70 from biometrics/events
Something like this
jklontz
2 parents 82113eb9 331bf830
Showing 3 changed files with 75 additions and 0 deletions
openbr/openbr_plugin.cpp
openbr/openbr_plugin.h
openbr/plugins/misc.cpp
@@ -1192,6 +1192,33 @@ void Transform::backProject(const TemplateList &amp;dst, TemplateList &amp;src) const
     futures.waitForFinished();
 }
  
+QList<Transform *> Transform::getChildren() const
+{
+    QList<Transform *> output;
+    for (int i=0; i < metaObject()->propertyCount(); i++) {
+        const char * prop_name = metaObject()->property(i).name();
+        const QVariant & variant = this->property(prop_name);
+
+        if (variant.canConvert<Transform *>())
+            output.append(variant.value<Transform *>());
+        if (variant.canConvert<QList<Transform *> >())
+            output.append(variant.value<QList<Transform *> >());
+    }
+    return output;
+}
+
+TemplateEvent * Transform::getEvent(const QString & name)
+{
+    foreach(Transform * child, getChildren())
+    {
+        TemplateEvent * probe = child->getEvent(name);
+        if (probe)
+            return probe;
+    }
+
+    return NULL;
+}
+
 /* Distance - public methods */
 Distance *Distance::make(QString str, QObject *parent)
 {
@@ -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 +1159,17 @@ 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);
+
+    /*!
+     * \brief Get a list of child transforms of this transform, child transforms are considered to be
+     * any transforms stored as properties of this transform.
+     */
+    QList<Transform *> getChildren() const;
+
 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. */
@@ -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"