Layer actions and navigations features

1.9.0

- feat: New shortcuts:
  - `F2` in Paint and Edit to rename active layer
  - `Insert` add a new layer (same as Krita)
  - `Shift + Insert` add a new layer and immediately pop-up a rename box
  - `page up / page down` change active layer up/down with a temporary fade (settings in addon prefs)
- fix: error when tweaking `gp.duplicate_send_to_layer` shortcut

__init__.py

@@ -15,7 +15,7 @@ bl_info = {
 "name": "GP toolbox",
 "description": "Tool set for Grease Pencil in animation production",
 "author": "Samuel Bernou, Christophe Seux",
-"version": (1, 8, 1),
+"version": (1, 9, 0),
 "blender": (2, 91, 0),
 "location": "Sidebar (N menu) > Gpencil > Toolbox / Gpencil properties",
 "warning": "",
@@ -51,6 +51,7 @@ from . import OP_depth_move
 from . import OP_key_duplicate_send
 from . import OP_layer_manager
 from . import OP_layer_picker
+from . import OP_layer_nav
 from . import OP_material_picker
 from . import OP_eraser_brush
 from . import TOOL_eraser_brush
@@ -310,6 +311,38 @@ class GPTB_prefs(bpy.types.AddonPreferences):
 
     fixprops: bpy.props.PointerProperty(type = GP_PG_FixSettings)
 
+    ## GP Layer navigator
+
+    nav_use_fade : BoolProperty(
+        name='Fade Inactive Layers',
+        description='Fade Inactive layers to determine active layer in a glimpse',
+        default=True)    
+
+    nav_fade_val : FloatProperty(
+        name='Fade Value',
+        description='Fade value for other layers when navigating (0=invisible)',
+        default=0.35, min=0.0, max=0.95, step=1, precision=2)
+    
+    nav_limit : FloatProperty(
+        name='Fade Duration',
+        description='Time of other layer faded when using layer navigation',
+        default=1.4, min=0.1, max=5, step=2, precision=1, subtype='TIME', unit='TIME')
+    
+    nav_use_fade_in : BoolProperty(
+        name='Progressive Fade Back',
+        description='Use a fade on other layer when navigating',
+        default=True)
+
+    nav_fade_in_time : FloatProperty(
+        name='Fade-In Time',
+        description='Duration of the fade',
+        default=0.5, min=0.1, max=5, step=2, precision=2, subtype='TIME', unit='TIME')
+
+    nav_interval : FloatProperty(
+        name='Refresh Rate',
+        description='Refresh rate for fade updating (upper value means stepped fade)',
+        default=0.04, min=0.01, max=0.5, step=3, precision=2, subtype='TIME', unit='TIME')
+
     ## Temp cutter
     # temp_cutter_use_shortcut: BoolProperty(
     #     name = "Use temp cutter Shortcut",
@@ -415,6 +448,21 @@ class GPTB_prefs(bpy.types.AddonPreferences):
 
             box = layout.box()
             box.label(text='Tools options:')
+            
+            subbox= box.box()
+            subbox.label(text='Layer Navigation')
+            col = subbox.column()
+            col.prop(self, 'nav_use_fade')
+            if self.nav_use_fade:
+                row = col.row()
+                row.prop(self, 'nav_fade_val')
+                row.prop(self, 'nav_limit')
+                row = subbox.row(align=False)
+                row.prop(self, 'nav_use_fade_in')
+                if self.nav_use_fade_in:
+                    row.prop(self, 'nav_fade_in_time', text='Fade Back Time')
+                    # row.prop(self, 'nav_interval') # Do not expose refresh rate for now, not usefull to user...
+
             box.prop(self, 'use_precise_eraser')
             
         if self.pref_tabs == 'KEYS':
@@ -427,14 +475,15 @@ class GPTB_prefs(bpy.types.AddonPreferences):
             ## TOOL_eraser_brush.addon_keymaps # has a checkbox in
 
             prev_key_category = ''
-            kmi_see_list = []
             for kms in [
                         OP_keyframe_jump.addon_keymaps,
                         OP_copy_paste.addon_keymaps,
-                        OP_breakdowner.breakdowner_addon_keymaps,
+                        OP_breakdowner.addon_keymaps,
                         OP_key_duplicate_send.addon_keymaps,
                         OP_layer_picker.addon_keymaps,
                         OP_material_picker.addon_keymaps,
+                        OP_layer_nav.addon_keymaps,
+                        # OP_layer_manager.addon_keymaps, # Do not display, wm.call_panel call panel ops mixed with natives shortcut (F2)
                         ]:
 
                 ct = 0
@@ -644,6 +693,7 @@ def register():
     OP_eraser_brush.register()
     OP_material_picker.register()
     OP_layer_picker.register()
+    OP_layer_nav.register()
     TOOL_eraser_brush.register()
     handler_draw_cam.register()
     UI_tools.register()
@@ -670,6 +720,7 @@ def unregister():
     UI_tools.unregister()
     handler_draw_cam.unregister()
     TOOL_eraser_brush.unregister()
+    OP_layer_nav.unregister()
     OP_layer_picker.unregister()
     OP_material_picker.unregister()
     OP_eraser_brush.unregister()