Refactor Node selection for better UX and performance

Original PR #2605 by yann-lty
Original: alicevision/Meshroom#2605

Author: Shallow Copy Bot

.git-blame-ignore-revs

@@ -1,3 +1,5 @@
+# [GraphEditor] Indentation fix
+87c0cef605e4ef2b359d7e678155e79b65b2e762
 # [qt6][qml] Clean-up code and harmonize comments
 5a0b1c0c9547b0d00f3f10fae6994d6d8ea0b45e
 # [nodes] Linting: Clean-up files

meshroom/common/qt.py

@@ -283,6 +283,15 @@ def _referenceItem(self, item):
 
         self._objectByKey[key] = item
 
+    @QtCore.Slot(int, result=QtCore.QModelIndex)
+    def index(self, row: int, column: int = 0, parent=QtCore.QModelIndex()):
+        """ Returns the model index for the given row, column and parent index. """
+        if parent.isValid() or column != 0:
+            return QtCore.QModelIndex()
+        if row < 0 or row >= self.size():
+            return QtCore.QModelIndex()
+        return self.createIndex(row, column, self._objects[row])
+
     def _dereferenceItem(self, item):
         # Ask for object deletion if parented to the model
         if shiboken6.isValid(item) and item.parent() == self:

meshroom/ui/components/__init__.py

@@ -1,11 +1,12 @@
 
 def registerTypes():
-    from PySide6.QtQml import qmlRegisterType
+    from PySide6.QtQml import qmlRegisterType, qmlRegisterSingletonType
     from meshroom.ui.components.clipboard import ClipboardHelper
     from meshroom.ui.components.edge import EdgeMouseArea
     from meshroom.ui.components.filepath import FilepathHelper
     from meshroom.ui.components.scene3D import Scene3DHelper, TrackballController, Transformations3DHelper
     from meshroom.ui.components.csvData import CsvData
+    from meshroom.ui.components.geom2D import Geom2D
 
     qmlRegisterType(EdgeMouseArea, "GraphEditor", 1, 0, "EdgeMouseArea")
     qmlRegisterType(ClipboardHelper, "Meshroom.Helpers", 1, 0, "ClipboardHelper")  # TODO: uncreatable
@@ -14,3 +15,5 @@ def registerTypes():
     qmlRegisterType(Transformations3DHelper, "Meshroom.Helpers", 1, 0, "Transformations3DHelper")  # TODO: uncreatable
     qmlRegisterType(TrackballController, "Meshroom.Helpers", 1, 0, "TrackballController")
     qmlRegisterType(CsvData, "DataObjects", 1, 0, "CsvData")
+
+    qmlRegisterSingletonType(Geom2D, "Meshroom.Helpers", 1, 0, "Geom2D")

meshroom/ui/components/geom2D.py

@@ -0,0 +1,8 @@
+from PySide6.QtCore import QObject, Slot, QRectF
+
+
+class Geom2D(QObject):
+    @Slot(QRectF, QRectF, result=bool)
+    def rectRectIntersect(self, rect1: QRectF, rect2: QRectF) -> bool:
+        """Check if two rectangles intersect."""
+        return rect1.intersects(rect2)