brush palette loading feature

1.4.3

- feat: load brushes from blend (behave like a Brush palette)
- ui: add load brushes within tool brush dropdown panel and in the top bar in drawmode
- pref: Set project brushes folder in addon preferences

CHANGELOG.md

@@ -1,6 +1,12 @@
 # Changelog
 
 
+1.4.3
+
+- feat: load brushes from blend
+- ui: add load brushes within tool brush dropdown panel and in the top bar in drawmode
+- pref: Set project brushes folder in addon preferences
+
 1.4.2
 
 - feat: new material cleaner in GP layer menu with 3 options

OP_brushes.py

@@ -0,0 +1,77 @@
+import bpy
+from bpy_extras.io_utils import ImportHelper
+from pathlib import Path
+from .utils import get_addon_prefs
+
+
+def get_brushes(blend_fp):
+    '''Get all brush from passed blend that aren't already in there (can take Path object)'''
+    cur_brushes = [b.name for b in bpy.data.brushes]
+    with bpy.data.libraries.load(str(blend_fp), link=False) as (data_from, data_to):
+        # load brushes if not already there
+        data_to.brushes = [b for b in data_from.brushes if not b in cur_brushes]
+
+    ## force fake user for appended the brushes
+    for b in data_to.brushes:
+        print(f'Append Brush: {b.name}')
+        b.use_fake_user = True
+
+    return len(data_to.brushes)
+
+
+class GPTB_OT_load_brushes(bpy.types.Operator, ImportHelper):
+    bl_idname = "gp.load_brushes"
+    bl_label = "Load Brushes"
+    bl_description = "Load all brushes from chosen blend file in current if brushes aren't already there\nIf a replacement is needed, delete the prefious brush before"
+    #bl_options = {"REGISTER", "INTERNAL"}
+
+    # @classmethod
+    # def poll(cls, context):
+    #     return context.object and context.object.type == 'GPENCIL'
+
+    filename_ext = '.blend'
+
+    filter_glob: bpy.props.StringProperty(default='*.blend', options={'HIDDEN'} )
+    
+    filepath : bpy.props.StringProperty(
+        name="File Path", 
+        description="File path used for import", 
+        maxlen= 1024)
+
+    def execute(self, context):
+        print(f'Appending brushes from file : {self.filepath}')
+        bct = get_brushes(self.filepath)
+        if bct:
+            self.report({'INFO'}, f'{bct} brushes appended')
+        else:
+            self.report({'WARNING'}, 'Brushes are already there (if need to re-import, delete first)')
+        return {"FINISHED"}
+
+
+### -- MENU ENTRY --
+
+def load_brush_ui(self, context):
+    if context.mode == 'PAINT_GPENCIL':
+        self.layout.operator('gp.load_brushes', icon='SMALL_TRI_RIGHT_VEC') # KEYTYPE_JITTER_VEC
+
+def load_brush_top_bar_ui(self, context):
+    if context.mode == 'PAINT_GPENCIL':
+        self.layout.operator('gp.load_brushes')
+
+classes = (
+GPTB_OT_load_brushes,
+)
+
+def register():
+    for cl in classes:
+        bpy.utils.register_class(cl)
+
+    bpy.types.VIEW3D_MT_brush_gpencil_context_menu.append(load_brush_ui)
+    bpy.types.VIEW3D_HT_tool_header.append(load_brush_top_bar_ui)
+
+def unregister():
+    bpy.types.VIEW3D_HT_tool_header.remove(load_brush_top_bar_ui)
+    bpy.types.VIEW3D_MT_brush_gpencil_context_menu.remove(load_brush_ui)
+    
+    for cl in reversed(classes):
+        bpy.utils.unregister_class(cl)

__init__.py

@@ -15,7 +15,7 @@ bl_info = {
 "name": "GP toolbox",
 "description": "Set of tools for Grease Pencil in animation production",
 "author": "Samuel Bernou",
-"version": (1, 4, 2),
+"version": (1, 4, 3),
 "blender": (2, 91, 0),
 "location": "Sidebar (N menu) > Gpencil > Toolbox / Gpencil properties",
 "warning": "",
@@ -41,6 +41,7 @@ from . import OP_helpers
 from . import OP_keyframe_jump
 from . import OP_cursor_snap_canvas
 from . import OP_palettes
+from . import OP_brushes
 from . import OP_file_checker
 from . import OP_render
 from . import OP_copy_paste
@@ -192,6 +193,11 @@ class GPTB_prefs(bpy.types.AddonPreferences):
         description="Path to palette containing palette.json files to save and load",
         default="//", maxlen=0, subtype='DIR_PATH')#, update = set_palette_path
 
+    brush_path : StringProperty(
+        name="Brushes directory",
+        description="Path to brushes containing the blends holding the brushes",
+        default="//", maxlen=0, subtype='DIR_PATH')#, update = set_palette_path
+
     ## Playblast prefs
     playblast_auto_play : BoolProperty(
         name="Playblast auto play",
@@ -311,8 +317,9 @@ class GPTB_prefs(bpy.types.AddonPreferences):
             row.prop(self, 'render_res_x', text='Width')
             row.prop(self, 'render_res_y', text='Height')
             ## Palette
-            box.label(text='Palette library folder:')
+            box.label(text='Project folders:')
             box.prop(self, 'palette_path')
+            box.prop(self, 'brush_path')
 
             ## render output
             box.prop(self, 'output_path')
@@ -443,6 +450,7 @@ def register():
     OP_playblast_bg.register()
     OP_playblast.register()
     OP_palettes.register()
+    OP_brushes.register()
     OP_cursor_snap_canvas.register()
     OP_render.register()
     OP_copy_paste.register()
@@ -478,6 +486,7 @@ def unregister():
     OP_copy_paste.unregister()
     OP_render.unregister()
     OP_cursor_snap_canvas.unregister()
+    OP_brushes.unregister()
     OP_palettes.unregister()
     OP_file_checker.unregister()
     OP_helpers.unregister()