UI: move gpencil tool-draw code to topbar

The grease pencil UI was showing twice in tool properties space.
Move to top-bar because this UI is meant as quick convenience access
which is expanded on in the tool properties editor.

release/scripts/startup/bl_ui/space_toolsystem_toolbar.py

@@ -1328,56 +1328,9 @@ class _defs_gpencil_paint:
 
         row.prop(gp_settings, "use_material_pin", text="")
 
-    @staticmethod
-    def draw_settings_common(context, layout, tool):
-        ob = context.active_object
-        if ob and ob.mode == 'GPENCIL_PAINT':
-            brush = context.active_gpencil_brush
-            if brush is None:
-                return
-            gp_settings = brush.gpencil_settings
-
-            row = layout.row(align=True)
-            ts = context.scene.tool_settings
-            settings = ts.gpencil_paint
-            row.template_ID_preview(settings, "brush", rows=3, cols=8, hide_buttons=True)
-
-            if brush.gpencil_tool == 'ERASE':
-                row = layout.row(align=True)
-                row.prop(brush, "size", text="Radius")
-                row.prop(gp_settings, "use_pressure", text="", icon='STYLUS_PRESSURE')
-                if gp_settings.eraser_mode == 'SOFT':
-                    row = layout.row(align=True)
-                    row.prop(gp_settings, "pen_strength", slider=True)
-                    row.prop(gp_settings, "use_strength_pressure", text="", icon='STYLUS_PRESSURE')
-            elif brush.gpencil_tool == 'FILL':
-                row = layout.row()
-                row.prop(gp_settings, "fill_leak", text="Leak Size")
-                row.prop(brush, "size", text="Thickness")
-                row.prop(gp_settings, "fill_simplify_level", text="Simplify")
-
-                _defs_gpencil_paint.draw_color_selector(context, layout)
-
-                row = layout.row(align=True)
-                row.prop(gp_settings, "fill_draw_mode", text="")
-                row.prop(gp_settings, "show_fill_boundary", text="", icon='GRID')
-
-            else:  # bgpsettings.tool == 'DRAW':
-                row = layout.row(align=True)
-                row.prop(brush, "size", text="Radius")
-                row.prop(gp_settings, "use_pressure", text="", icon='STYLUS_PRESSURE')
-                row = layout.row(align=True)
-                row.prop(gp_settings, "pen_strength", slider=True)
-                row.prop(gp_settings, "use_strength_pressure", text="", icon='STYLUS_PRESSURE')
-
-                _defs_gpencil_paint.draw_color_selector(context, layout)
-
     @staticmethod
     def generate_from_brushes(context):
 
-        def draw_settings(context, layout, tool):
-            _defs_gpencil_paint.draw_settings_common(context, layout, tool)
-
         return generate_from_brushes_tool_slots_ex(
             context, context.tool_settings.gpencil_paint,
             icon_prefix="brush.gpencil_draw.",
@@ -1389,7 +1342,6 @@ class _defs_gpencil_paint:
             ),
             tooldef_keywords=dict(
                 operator="gpencil.draw",
-                draw_settings=draw_settings,
             ),
         )
 
@@ -2044,6 +1996,7 @@ class VIEW3D_PT_tools_active(ToolSelectPanelHelper, Panel):
         ],
     }
 
+
 class TOPBAR_PT_annotation_layers(Panel, AnnotationDataPanel):
     bl_space_type = 'VIEW_3D'
     bl_region_type = 'HEADER'

release/scripts/startup/bl_ui/space_topbar.py

@@ -241,6 +241,7 @@ class _draw_left_context_mode:
             UnifiedPaintPanel.prop_unified_strength(layout, context, brush, "strength", slider=True, text="Strength")
             layout.prop(brush, "direction", text="", expand=True)
 
+        @staticmethod
         def PAINT_TEXTURE(context, layout, tool):
             if (tool is None) or (not tool.has_datablock):
                 return
@@ -258,6 +259,7 @@ class _draw_left_context_mode:
             UnifiedPaintPanel.prop_unified_size(layout, context, brush, "size", slider=True, text="Radius")
             UnifiedPaintPanel.prop_unified_strength(layout, context, brush, "strength", slider=True, text="Strength")
 
+        @staticmethod
         def PAINT_VERTEX(context, layout, tool):
             if (tool is None) or (not tool.has_datablock):
                 return
@@ -275,6 +277,7 @@ class _draw_left_context_mode:
             UnifiedPaintPanel.prop_unified_size(layout, context, brush, "size", slider=True, text="Radius")
             UnifiedPaintPanel.prop_unified_strength(layout, context, brush, "strength", slider=True, text="Strength")
 
+        @staticmethod
         def PAINT_WEIGHT(context, layout, tool):
             if (tool is None) or (not tool.has_datablock):
                 return
@@ -291,6 +294,80 @@ class _draw_left_context_mode:
             UnifiedPaintPanel.prop_unified_size(layout, context, brush, "size", slider=True, text="Radius")
             UnifiedPaintPanel.prop_unified_strength(layout, context, brush, "strength", slider=True, text="Strength")
 
+        @staticmethod
+        def GPENCIL_PAINT(context, layout, tool):
+
+            if (tool is None) or (not tool.has_datablock):
+                return
+
+            paint = context.tool_settings.gpencil_paint
+            brush = paint.brush
+            if brush is None:
+                return
+
+            gp_settings = brush.gpencil_settings
+
+            def draw_color_selector():
+                ma = gp_settings.material
+                row = layout.row(align=True)
+
+                icon_id = 0
+                if ma:
+                    icon_id = ma.id_data.preview.icon_id
+                    txt_ma = ma.name
+                    maxw = 25
+                    if len(txt_ma) > maxw:
+                        txt_ma = txt_ma[:maxw - 5] + '..' + txt_ma[-3:]
+                else:
+                    txt_ma = ""
+
+                row.label(text="Material:")
+                sub = row.row()
+                sub.ui_units_x = 8
+                sub.popover(
+                    panel="TOPBAR_PT_gpencil_materials",
+                    text=txt_ma,
+                    icon_value=icon_id,
+                )
+
+                row.prop(gp_settings, "use_material_pin", text="")
+
+            row = layout.row(align=True)
+            ts = context.scene.tool_settings
+            settings = ts.gpencil_paint
+            row.template_ID_preview(settings, "brush", rows=3, cols=8, hide_buttons=True)
+
+            if brush.gpencil_tool == 'ERASE':
+                row = layout.row(align=True)
+                row.prop(brush, "size", text="Radius")
+                row.prop(gp_settings, "use_pressure", text="", icon='STYLUS_PRESSURE')
+                if gp_settings.eraser_mode == 'SOFT':
+                    row = layout.row(align=True)
+                    row.prop(gp_settings, "pen_strength", slider=True)
+                    row.prop(gp_settings, "use_strength_pressure", text="", icon='STYLUS_PRESSURE')
+            elif brush.gpencil_tool == 'FILL':
+                row = layout.row()
+                row.prop(gp_settings, "fill_leak", text="Leak Size")
+                row.prop(brush, "size", text="Thickness")
+                row.prop(gp_settings, "fill_simplify_level", text="Simplify")
+
+                draw_color_selector()
+
+                row = layout.row(align=True)
+                row.prop(gp_settings, "fill_draw_mode", text="")
+                row.prop(gp_settings, "show_fill_boundary", text="", icon='GRID')
+
+            else:  # bgpsettings.tool == 'DRAW':
+                row = layout.row(align=True)
+                row.prop(brush, "size", text="Radius")
+                row.prop(gp_settings, "use_pressure", text="", icon='STYLUS_PRESSURE')
+                row = layout.row(align=True)
+                row.prop(gp_settings, "pen_strength", slider=True)
+                row.prop(gp_settings, "use_strength_pressure", text="", icon='STYLUS_PRESSURE')
+
+                draw_color_selector()
+
+        @staticmethod
         def PARTICLE(context, layout, tool):
             # See: 'VIEW3D_PT_tools_brush', basically a duplicate
             settings = context.tool_settings.particle_edit
@@ -323,6 +400,7 @@ class _draw_left_context_mode:
                         sub.prop(settings, "emitter_distance", text="Distance")
 
     class IMAGE_EDITOR:
+        @staticmethod
         def VIEW(context, layout, tool):
             tool_settings = context.tool_settings
             if tool_settings.use_uv_sculpt:
@@ -340,6 +418,7 @@ class _draw_left_context_mode:
                         UnifiedPaintPanel.prop_unified_strength(row, context, brush, "strength", slider=True, text="Strength")
                         UnifiedPaintPanel.prop_unified_strength(row, context, brush, "use_pressure_strength")
 
+        @staticmethod
         def PAINT(context, layout, tool):
             if (tool is None) or (not tool.has_datablock):
                 return