complete first version

__init__.py

@@ -1,19 +1,42 @@
-from gp_interpolate.interpolate_strokes import operators, properties
+bl_info = {
+    "name": "gp interpolate",
+    "author": "Christophe Seux, Samuel Bernou",
+    "version": (0, 1, 0),
+    "blender": (3, 6, 0),
+    "location": "",
+    "description": "Interpolate Grease pencil strokes",
+    "warning": "",
+    "wiki_url": "",
+    "tracker_url": "",
+    "category": "Animation"}
+
+
+import sys
+from pathlib import Path
+import importlib
+
+# Ensure the name of the module in python import
+module_name = Path(__file__).parent.name
+sys.modules.update({'gp_interpolate': importlib.import_module(module_name)})
+
+
+from gp_interpolate import interpolate_strokes, ui
 
 modules = (
-    properties,
-    operators,
+    interpolate_strokes,
+    ui,
 )
 
-if "bpy" in locals():
-    import importlib
+# if "bpy" in locals():
+#     import importlib
 
-    for mod in modules:
-        importlib.reload(mod)
+#     for mod in modules:
+#         importlib.reload(mod)
 
 import bpy
 
 def register():
+    print('Register gp_interpolate')
     for mod in modules:
         mod.register()
 

interpolate_strokes/__init__.py

@@ -0,0 +1,22 @@
+from gp_interpolate.interpolate_strokes import operators, properties
+
+modules = (
+    properties,
+    operators,
+)
+
+if "bpy" in locals():
+    import importlib
+
+    for mod in modules:
+        importlib.reload(mod)
+
+import bpy
+
+def register():
+    for mod in modules:
+        mod.register()
+
+def unregister():
+    for mod in reversed(modules):
+        mod.unregister()

ui.py

@@ -0,0 +1,51 @@
+import bpy
+
+class GP_PT_interpolate(bpy.types.Panel):
+    bl_label = "Interpolate"
+    bl_category = "Gpencil"
+    bl_space_type = 'VIEW_3D'
+    bl_region_type = 'UI'
+
+    @classmethod
+    def poll(cls, context):
+        return context.object and context.object.type == 'GPENCIL'
+
+    def draw(self, context):
+        settings = bpy.context.scene.gp_interpo_settings
+
+        layout = self.layout
+        col = layout.column(align=False)
+
+        if settings.mode == 'FRAME':
+            prev_icon, next_icon = 'FRAME_PREV', 'FRAME_NEXT'
+        else:
+            prev_icon, next_icon = 'PREV_KEYFRAME', 'NEXT_KEYFRAME'
+
+
+        row = col.row(align=True)
+        row.scale_x = 3
+        row.operator("gp.interpolate_stroke", text="", icon=prev_icon).next = False
+        row.operator("gp.interpolate_stroke", text="", icon=next_icon).next = True
+        # col.separator()
+
+        col.prop(settings, 'target_collection', text='Collection')
+        col.prop(settings, 'search_range')
+        col = layout.column(align=True)
+
+        row = col.row(align=True)
+        row.prop(settings, 'mode', expand=True)
+
+        if settings.mode == 'FRAME':
+            col.prop(settings, 'padding')
+
+classes = (
+    GP_PT_interpolate,
+)
+
+def register():
+    for c in classes:
+        bpy.utils.register_class(c)
+
+def unregister():
+    for c in reversed(classes) :
+        bpy.utils.unregister_class(c)