[WIP] Instanciation of "back end"

Creation of Iteration Nodes for each instance that are not displayed in the graph

meshroom/core/graph.py

@@ -898,7 +898,6 @@ def addEdge(self, srcAttr, dstAttr):
         dstAttr.valueChanged.emit()
         dstAttr.isLinkChanged.emit()
         srcAttr.hasOutputConnectionsChanged.emit()
-        dstAttr.node.countForLoopChanged.emit()
         return edge
 
     def addEdges(self, *edges):
@@ -915,7 +914,6 @@ def removeEdge(self, dstAttr):
         dstAttr.valueChanged.emit()
         dstAttr.isLinkChanged.emit()
         edge.src.hasOutputConnectionsChanged.emit()
-        dstAttr.node.countForLoopChanged.emit()
 
     def getDepth(self, node, minimal=False):
         """ Return node's depth in this Graph.
@@ -1486,7 +1484,6 @@ def markNodesDirty(self, fromNode):
         nodes, edges = self.dfsOnDiscover(startNodes=[fromNode], reverse=True)
         for node in nodes:
             node.dirty = True
-            node.countForLoopChanged.emit()
 
     def stopExecution(self):
         """ Request graph execution to be stopped by terminating running chunks"""

meshroom/core/node.py

@@ -58,6 +58,55 @@ class ExecMode(Enum):
     LOCAL = 1
     EXTERN = 2
 
+class ForLoopData(BaseObject):
+    """
+    """
+
+    def __init__(self, parentNode=None, connectedAttribute=None, parent=None):
+        super(ForLoopData, self).__init__(parent)
+        self._countForLoop = 0
+        self._iterations = ListModel(parent=self) # list of nodes for each iteration
+        self._parentNode = parentNode  # parent node
+        self.connectedAttribute = connectedAttribute  # attribute connected to the ForLoop node from parent node
+
+    def update(self, currentNode=None):
+        # set the connectedAttribute
+        if currentNode is not None:
+            for attr in currentNode._attributes:
+                if attr.isInput and attr.isLink:
+                    srcAttr = attr.getLinkParam()
+                    # If the srcAttr is a ListAttribute, it means that the node is in a ForLoop
+                    if isinstance(srcAttr.root, ListAttribute) and srcAttr.type == attr.type:
+                        self.connectedAttribute = srcAttr.root
+                        self._parentNode = srcAttr.root.node
+                        break
+
+        # set the countForLoop
+        if self.connectedAttribute is not None:
+            self._countForLoop = self._parentNode._forLoopData._countForLoop + 1
+            if self.connectedAttribute.isInput:
+                self._countForLoop -= 1 if self._countForLoop > 1 else 1
+
+            # set the iterations by creating iteration nodes for each connected attribute value and will add them to the core graph and not the ui one
+            for i in range(len(self.connectedAttribute.value)):
+                iterationNode = IterationNode(currentNode, i)
+                # check if node already exists
+                if iterationNode.name not in [n.name for n in self._parentNode.graph.nodes]:
+                    self._parentNode.graph.addNode(iterationNode, iterationNode.name)
+                self._iterations.append(iterationNode)
+
+            self.parentNodeChanged.emit()
+            self.iterationsChanged.emit()
+            self.countForLoopChanged.emit()
+
+    countForLoopChanged = Signal()
+    countForLoop = Property(int, lambda self: self._countForLoop, notify=countForLoopChanged)
+    iterationsChanged = Signal()
+    iterations = Property(Variant, lambda self: self._iterations, notify=iterationsChanged)
+    parentNodeChanged = Signal()
+    parentNode = Property(Variant, lambda self: self._parentNode, notify=parentNodeChanged)
+
+
 
 class StatusData(BaseObject):
     """
@@ -513,6 +562,7 @@ def __init__(self, nodeType, position=None, parent=None, uids=None, **kwargs):
         self._locked = False
         self._duplicates = ListModel(parent=self)  # list of nodes with the same uid
         self._hasDuplicates = False
+        self._forLoopData = ForLoopData()
 
         self.globalStatusChanged.connect(self.updateDuplicatesStatusAndLocked)
 
@@ -967,6 +1017,10 @@ def updateInternals(self, cacheDir=None):
 
         # Update chunks splitting
         self._updateChunks()
+
+        # try to update for loopdata as node is created
+        self._forLoopData.update(self)
+
         # Retrieve current internal folder (if possible)
         try:
             folder = self.internalFolder
@@ -1321,23 +1375,11 @@ def has3DOutputAttribute(self):
                 return True
         return False
 
-    def _countForLoop(self):
+    def getForLoopData(self):
         """
-        Return in how many ForLoop nodes this node is.
+        Return the ForLoopData of the node.
         """
-        count = 0
-        # Access to the input attributes of the node
-        for attr in self._attributes:
-            if attr.isInput and attr.isLink:
-                # Access to the attribute connected to the input attribute
-                srcAttr = attr.getLinkParam()
-                # If the srcAttr is a ListAttribute, it means that the node is in a ForLoop
-                if isinstance(srcAttr.root, ListAttribute) and srcAttr.type == attr.type:
-                    # Access the countForLoop of the node of the ListAttribute
-                    count = srcAttr.root.node.countForLoop + 1
-                    if srcAttr.root.isInput:
-                        count = count - 1 if count > 1 else 1
-        return count
+        return self._forLoopData
 
 
 
@@ -1392,8 +1434,8 @@ def _countForLoop(self):
     hasSequenceOutput = Property(bool, hasSequenceOutputAttribute, notify=outputAttrEnabledChanged)
     has3DOutput = Property(bool, has3DOutputAttribute, notify=outputAttrEnabledChanged)
 
-    countForLoopChanged = Signal()
-    countForLoop = Property(int, _countForLoop, notify=countForLoopChanged)
+    forLoopDataChanged = Signal()
+    forLoopData = Property(Variant, getForLoopData, notify=forLoopDataChanged)
 
 class Node(BaseNode):
     """
@@ -1535,6 +1577,22 @@ def _updateChunks(self):
                 self._chunks[0].range = desc.Range()
 
 
+class IterationNode(BaseNode):
+    """
+    A node that is not added to the graph but used to process a specific iteration of a ForLoop node.
+    """
+    def __init__(self, node, iteration):
+        super(IterationNode, self).__init__(node.nodeType, parent=node.graph, uids=node._uids)
+        self._name = f"{node.name}_{iteration}"
+
+        self._chunks.setObjectList([NodeChunk(self, desc.Range(iteration, iteration))])
+
+        # if iteration is 3 set status to success
+        if iteration == 3 or iteration == 12:
+            self._chunks.at(0).status.status = Status.SUCCESS
+
+        # print(self._attributes.at(0))
+
 class CompatibilityIssue(Enum):
     """
     Enum describing compatibility issues when deserializing a Node.

meshroom/ui/graph.py

@@ -17,7 +17,7 @@
 
 from meshroom.core.taskManager import TaskManager
 
-from meshroom.core.node import NodeChunk, Node, Status, ExecMode, CompatibilityNode, Position
+from meshroom.core.node import NodeChunk, Node, Status, ExecMode, CompatibilityNode, Position, IterationNode
 from meshroom.core import submitters
 from meshroom.ui import commands
 from meshroom.ui.utils import makeProperty
@@ -776,7 +776,6 @@ def expandForLoop(self, currentEdge):
                 newNode = duplicates[0]
                 previousEdge = self.graph.edge(newNode.attribute(dst.name))
                 self.replaceEdge(previousEdge, listAttribute.at(i), previousEdge.dst)
-                newNode.countForLoopChanged.emit()
 
     @Slot(Edge)
     def collapseForLoop(self, currentEdge):
@@ -1119,12 +1118,26 @@ def pasteNodes(self, clipboardContent, position=None, centerPosition=False):
             positions.append(finalPosition)
 
         return self.push(commands.PasteNodesCommand(self.graph, d, position=positions))
+
+    def getNodes(self):
+        """
+        Return all the nodes that are not Iteration nodes.
+        """
+        nodes = self._graph.nodes
+        toRemove = []
+        for node in nodes.values():
+            if isinstance(node, IterationNode):
+                toRemove.append(node)
+        for node in toRemove:
+            nodes.pop(node.name)
+        return nodes
+
 
     undoStack = Property(QObject, lambda self: self._undoStack, constant=True)
     graphChanged = Signal()
     graph = Property(Graph, lambda self: self._graph, notify=graphChanged)
     taskManager = Property(TaskManager, lambda self: self._taskManager, constant=True)
-    nodes = Property(QObject, lambda self: self._graph.nodes, notify=graphChanged)
+    nodes = Property(QObject, getNodes, notify=graphChanged)
     layout = Property(GraphLayout, lambda self: self._layout, constant=True)
 
     computeStatusChanged = Signal()

meshroom/ui/qml/GraphEditor/GraphEditor.qml

@@ -1066,7 +1066,7 @@ Item {
         Repeater {
             id: filteredNodes
             model: SortFilterDelegateModel {
-                model: root.graph ? root.graph.nodes : undefined
+                model: root.uigraph ? root.uigraph.nodes : undefined
                 sortRole: "label"
                 filters: [{role: "label", value: graphSearchBar.text}]
                 delegate: Item {

meshroom/ui/qml/GraphEditor/Node.qml

@@ -278,12 +278,12 @@ Item {
 
                             // Is in for loop indicator
                             MaterialLabel {
-                                visible: node.countForLoop > 0
+                                visible: node.forLoopData.countForLoop > 0
                                 text: MaterialIcons.loop
                                 padding: 2
                                 font.pointSize: 7
                                 palette.text: Colors.sysPalette.text
-                                ToolTip.text: "Is in " + node.countForLoop + " for loop(s)"
+                                ToolTip.text: "Is in " + node.forLoopData.countForLoop + " for loop(s)"
                             }
 
                             // Submitted externally indicator
@@ -386,14 +386,15 @@ Item {
                         // so if the count is 0 we display only one iteration
                         // else we display the number of iterations
                         model: {
-                            if (node.countForLoop === 0)
-                                return 1
-
-                            for (let i = 0; i < node.attributes.count; ++i) {
-                                if (node.attributes.at(i).isLink) {
-                                    var srcAttr = node.attributes.at(i).linkParam
-                                    return srcAttr.root.value.count
+                            if (node.forLoopData.countForLoop === 0) {
+                                return node
+                            } else {
+                                // convert the iterations to a list
+                                let list = []
+                                for (let i = 0; i < node.forLoopData.iterations.count; ++i) {
+                                    list.push(node.forLoopData.iterations.at(i))
                                 }
+                                return list
                             }
                         }
 
@@ -402,7 +403,9 @@ Item {
                             defaultColor: Colors.sysPalette.mid
                             height: 3
                             width: parent.width
-                            model: node ? node.chunks : undefined
+                            model: {
+                                return modelData.chunks
+                            }
 
                             Rectangle {
                                 anchors.fill: parent

meshroom/ui/qml/GraphEditor/NodeEditor.qml

@@ -258,29 +258,40 @@ Panel {
                     anchors.fill: parent
 
                     // The list of iterations
-                    NodeEditorElementsListView {
-                        id: iterationsLV
-                        visible: root.node.countForLoop > 0
-                        elements: {
-                            if (root.node.countForLoop == 0)
-                                return []
-                            var elements = []
-                            for (let i = 0; i < node.attributes.count; ++i) {
-                                if (node.attributes.at(i).isLink) {
-                                    var srcAttr = node.attributes.at(i).linkParam
-                                    for (let j = 0; j < srcAttr.root.value.count; ++j) {
-                                        elements.push(j)
-                                    }
-                                    return elements
-                                }
+
+                    Repeater {
+                        id: iterationsRepeater
+                        visible: root.node.forLoopData.countForLoop > 0
+
+                        model: {
+                            let currentNode = root.node
+                            let count = root.node.forLoopData.countForLoop
+                            let list = []
+                            for (let i = 0; i < count; i++) {
+                                let parent = currentNode.forLoopData.parentNode
+                                list.push(currentNode.forLoopData.iterations)
+                                currentNode = parent
                             }
+
+                            // reverse the list
+                            list.reverse()
+                            return list
                         }
 
-                        // TODO to remove when the elements would be correct
-                        currentElement: elements[0]
-
-                        isChunk: false
-                        title: "Iterations"
+                        NodeEditorElementsListView {
+                            id: iterationsLV
+                            elements: {
+                                if (root.node.forLoopData.countForLoop == 0)
+                                    return []
+                                return modelData
+                            }
+
+                            // TODO to remove when the elements would be correct
+                            // currentElement: elements[0]
+
+                            isChunk: false
+                            title: "Iterations"
+                        }
                     }
 
                     // The list of chunks

meshroom/ui/qml/GraphEditor/NodeEditorElementsListView.qml

@@ -92,7 +92,13 @@ ColumnLayout {
             Rectangle {
                 width: 4
                 height: parent.height
-                color: isChunk ? Common.getChunkColor(parent.element) : palette.mid
+                color: {
+                    if (isChunk) {
+                        return Common.getChunkColor(parent.element)
+                    } else {
+                        return Common.getChunkColor(parent.element.chunks.at(0))
+                    }
+                }
             }
         }
     }