[ui] GraphEditor: select pipelines imported through the node menu

Add all the nodes from a pipeline imported through the node menu to the
node selection.
This involves changing the return value of ImportProjectCommand from a
boolean to a list of imported nodes.

meshroom/ui/commands.py

@@ -245,7 +245,7 @@ class ImportProjectCommand(GraphCommand):
             else:
                 self.graph.node(node.name).position = Position(node.x, node.y + lowestY + self.yOffset)
 
-        return status
+        return importedNodes
 
     def undoImpl(self):
         for nodeName in self.importedNames:

meshroom/ui/graph.py

@@ -353,8 +353,8 @@ class UIGraph(QObject):
         self.setGraph(g)
         return status
 
-    @Slot(QUrl, result=bool)
-    @Slot(QUrl, QPoint, result=bool)
+    @Slot(QUrl, result="QVariantList")
+    @Slot(QUrl, QPoint, result="QVariantList")
     def importProject(self, filepath, position=None):
         if isinstance(filepath, (QUrl)):
             # depending how the QUrl has been initialized,

meshroom/ui/qml/GraphEditor/GraphEditor.qml

@@ -234,7 +234,9 @@ Item {
             {
                 if (MeshroomApp.pipelineTemplateNames.includes(pipeline)) {
                     var url = MeshroomApp.pipelineTemplateFiles[MeshroomApp.pipelineTemplateNames.indexOf(pipeline)]["path"]
-                    uigraph.importProject(Filepath.stringToUrl(url), spawnPosition)
+                    var nodes = uigraph.importProject(Filepath.stringToUrl(url), spawnPosition)
+                    uigraph.selectedNode = nodes[0]
+                    uigraph.selectNodes(nodes)
                     return true
                 }
                 return false