Curve tools: Calculate length on multiple curves

Added support for multiple curves on the curve length tool.

Pull Request: https://projects.blender.org/blender/blender-addons/pulls/104836

Author: sigmike

curve_tools/__init__.py

@@ -6,7 +6,7 @@
     "name": "Curve Tools",
     "description": "Adds some functionality for bezier/nurbs curve/surface modeling",
     "author": "Mackraken, Spivak Vladimir (cwolf3d)",
-    "version": (0, 4, 5),
+    "version": (0, 4, 6),
     "blender": (2, 80, 0),
     "location": "View3D > Tool Shelf > Edit Tab",
     "doc_url": "{BLENDER_MANUAL_URL}/addons/add_curve/curve_tools.html",

curve_tools/operators.py

@@ -52,18 +52,23 @@ def execute(self, context):
 class OperatorCurveLength(bpy.types.Operator):
     bl_idname = "curvetools.operatorcurvelength"
     bl_label = "Length"
-    bl_description = "Calculates the length of the active/selected curve"
+    bl_description = "Calculates the length of the active/selected curves"
 
 
     @classmethod
     def poll(cls, context):
-        return util.Selected1Curve()
+        return util.Selected1OrMoreCurves()
 
 
     def execute(self, context):
-        curve = curves.Curve(context.active_object)
+        selCurves = util.GetSelectedCurves()
+
+        length = 0
+        for blCurve in selCurves:
+            curve = curves.Curve(blCurve)
+            length += curve.length
 
-        context.scene.curvetools.CurveLength = curve.length
+        context.scene.curvetools.CurveLength = length
 
         return {'FINISHED'}