[core] PushButton attribute implemented

Add PushButtonParam class and implement onAttributeClicked method

meshroom/core/attribute.py

@@ -31,6 +31,8 @@ def attributeFactory(description, value, isOutput, node, root=None, parent=None)
         cls = ListAttribute
     elif isinstance(description, desc.ChoiceParam):
         cls = ChoiceParam
+    elif isinstance(description, desc.PushButtonParam):
+        cls = PushButtonParam
     else:
         cls = Attribute
     attr = cls(node, description, isOutput, root, parent)
@@ -398,6 +400,13 @@ def raiseIfLink(func):
         return func(attr, *args, **kwargs)
     return wrapper
 
+class PushButtonParam(Attribute):
+    def __init__(self, node, attributeDesc, isOutput, root=None, parent=None):
+        super(PushButtonParam, self).__init__(node, attributeDesc, isOutput, root, parent)
+    
+    @Slot()
+    def clicked(self):
+        self.node.onAttributeClicked(self)
 
 class ChoiceParam(Attribute):
 

meshroom/core/desc.py

@@ -301,6 +301,15 @@ class FloatParam(Param):
 
     range = Property(VariantList, lambda self: self._range, constant=True)
 
+class PushButtonParam(Param):
+    """
+    """
+    def __init__(self, name, label, description, uid, group='allParams', advanced=False, semantic='', enabled=True, visible=True):
+        super(PushButtonParam, self).__init__(name=name, label=label, description=description, value="", uid=uid, group=group, advanced=advanced, semantic=semantic, enabled=enabled, visible=visible)
+    def validateValue(self, value):
+        pass
+    def checkValueTypes(self):
+        pass
 
 class ChoiceParam(Param):
     """

meshroom/core/node.py

@@ -892,6 +892,19 @@ class BaseNode(BaseObject):
             if callable(m):
                 m(self)
 
+    def onAttributeClicked(self, attr):
+        """ When an attribute is clicked, a specific function can be defined in the descriptor and be called.
+
+        Args:
+            attr (Attribute): attribute that has been clicked
+        """
+        paramName = attr.name[:1].upper() + attr.name[1:]
+        methodName = f'on{paramName}Clicked'
+        if hasattr(self.nodeDesc, methodName):
+            m = getattr(self.nodeDesc, methodName)
+            if callable(m):
+                m(self)
+
     def updateInternals(self, cacheDir=None):
         """ Update Node's internal parameters and output attributes.