Object: new add object tool, currently for primitive types

- Interactively adding primitives with two clicks.
- Scene orientation used for new objects.
- Depth [view-plane, axis-plane, surface]
- Origin [base, center]
- Primitive types [cube, cylinder, cone, uv-sphere, ico-sphere ]
- Settings for object types in the top-bar.

Shortcuts:

- Snapping (Ctrl).
- Constrain 1:1 aspect (Shift).
- Toggle center (Alt).

Part of T57210 design task.

release/scripts/startup/bl_ui/space_toolsystem_toolbar.py

@@ -436,10 +436,124 @@ class _defs_view3d_select:
         )
 
 
+class _defs_view3d_add:
+
+    # Layout tweaks here would be good to avoid,
+    # this shows limits in layout engine, as buttons are using a lot of space.
+    @staticmethod
+    def draw_settings_interactive_add(layout, tool):
+        props = tool.operator_properties("view3d.interactive_add")
+        row = layout.row()
+        row.scale_x = 0.8
+        row.label(text="Depth:")
+        row = layout.row()
+        row.scale_x = 0.9
+        row.prop(props, "plane_depth", text="")
+        row = layout.row()
+        row.prop(props, "plane_axis", text="")
+        row = layout.row()
+        row.scale_x = 0.7
+        row.prop(props, "plane_origin")
+
+    @ToolDef.from_fn
+    def cube_add():
+        def draw_settings(_context, layout, tool):
+            _defs_view3d_add.draw_settings_interactive_add(layout, tool)
+        return dict(
+            idname="builtin.primitive_cube_add",
+            label="Add Cube",
+            icon="ops.mesh.primitive_cube_add_gizmo",
+            description=(
+                "Add cube to mesh interactively"
+            ),
+            widget="VIEW3D_GGT_placement",
+            keymap="3D View Tool: Object, Add Primitive",
+            draw_settings=draw_settings,
+        )
+
+    @ToolDef.from_fn
+    def cone_add():
+        def draw_settings(_context, layout, tool):
+            _defs_view3d_add.draw_settings_interactive_add(layout, tool)
+
+            props = tool.operator_properties("mesh.primitive_cone_add")
+            layout.prop(props, "vertices")
+            layout.prop(props, "end_fill_type")
+        return dict(
+            idname="builtin.primitive_cone_add",
+            label="Add Cone",
+            icon="ops.mesh.primitive_cube_add_gizmo",
+            description=(
+                "Add cone to mesh interactively"
+            ),
+            widget="VIEW3D_GGT_placement",
+            keymap="3D View Tool: Object, Add Primitive",
+            draw_settings=draw_settings,
+        )
+
+    @ToolDef.from_fn
+    def cylinder_add():
+        def draw_settings(_context, layout, tool):
+            _defs_view3d_add.draw_settings_interactive_add(layout, tool)
+
+            props = tool.operator_properties("mesh.primitive_cylinder_add")
+            layout.prop(props, "vertices")
+            layout.prop(props, "end_fill_type")
+        return dict(
+            idname="builtin.primitive_cylinder_add",
+            label="Add Cylinder",
+            icon="ops.mesh.primitive_cylinder_add_gizmo",
+            description=(
+                "Add cylinder to mesh interactively"
+            ),
+            widget="VIEW3D_GGT_placement",
+            keymap="3D View Tool: Object, Add Primitive",
+            draw_settings=draw_settings,
+        )
+
+    @ToolDef.from_fn
+    def uv_sphere_add():
+        def draw_settings(_context, layout, tool):
+            _defs_view3d_add.draw_settings_interactive_add(layout, tool)
+
+            props = tool.operator_properties("mesh.primitive_uv_sphere_add")
+            layout.prop(props, "segments")
+            layout.prop(props, "ring_count")
+        return dict(
+            idname="builtin.primitive_uv_sphere_add",
+            label="Add UV Sphere",
+            icon="ops.mesh.primitive_sphere_add_gizmo",
+            description=(
+                "Add cylinder to mesh interactively"
+            ),
+            widget="VIEW3D_GGT_placement",
+            keymap="3D View Tool: Object, Add Primitive",
+            draw_settings=draw_settings,
+        )
+
+    @ToolDef.from_fn
+    def ico_sphere_add():
+        def draw_settings(_context, layout, tool):
+            _defs_view3d_add.draw_settings_interactive_add(layout, tool)
+
+            props = tool.operator_properties("mesh.primitive_ico_sphere_add")
+            layout.prop(props, "subdivisions")
+        return dict(
+            idname="builtin.primitive_ico_sphere_add",
+            label="Add Ico Sphere",
+            icon="ops.mesh.primitive_sphere_add_gizmo",
+            description=(
+                "Add cylinder to mesh interactively"
+            ),
+            widget="VIEW3D_GGT_placement",
+            keymap="3D View Tool: Object, Add Primitive",
+            draw_settings=draw_settings,
+        )
+
+
 # -----------------------------------------------------------------------------
 # Object Modes (named based on context.mode)
 
-
 class _defs_edit_armature:
 
     @ToolDef.from_fn
@@ -497,19 +611,6 @@ class _defs_edit_armature:
 
 class _defs_edit_mesh:
 
-    @ToolDef.from_fn
-    def cube_add():
-        return dict(
-            idname="builtin.add_cube",
-            label="Add Cube",
-            icon="ops.mesh.primitive_cube_add_gizmo",
-            description=(
-                "Add cube to mesh interactively"
-            ),
-            widget=None,
-            keymap=(),
-        )
-
     @ToolDef.from_fn
     def rip_region():
         def draw_settings(_context, layout, tool):
@@ -2147,6 +2248,14 @@ class VIEW3D_PT_tools_active(ToolSelectPanelHelper, Panel):
         ),
     )
 
+    _tools_view3d_add = (
+        _defs_view3d_add.cube_add,
+        _defs_view3d_add.cone_add,
+        _defs_view3d_add.cylinder_add,
+        _defs_view3d_add.uv_sphere_add,
+        _defs_view3d_add.ico_sphere_add,
+    )
+
     _tools_default = (
         *_tools_select,
         _defs_view3d_generic.cursor,
@@ -2165,6 +2274,9 @@ class VIEW3D_PT_tools_active(ToolSelectPanelHelper, Panel):
         ],
         'OBJECT': [
             *_tools_default,
+
+            None,
+            _tools_view3d_add,
         ],
         'POSE': [
             *_tools_default,
@@ -2193,6 +2305,8 @@ class VIEW3D_PT_tools_active(ToolSelectPanelHelper, Panel):
         'EDIT_MESH': [
             *_tools_default,
             None,
+            _tools_view3d_add,
+            None,
             (
                 _defs_edit_mesh.extrude,
                 _defs_edit_mesh.extrude_dissolve_and_intersect,