Add-on Example

Add Objects.py

bl_info = {
    "name": "Add Objects",
    "author": "Demohero",
    "version": (1, 0),
    "blender": (3, 3, 0),
    "location": "View3D > Sidebar",
    "description": "Adds objects to the scene",
    "warning": "",
    "doc_url": "",
    "category": "Add Objects",
}

import bpy


class AddObjects(bpy.types.Panel):
    """Creates a Panel in the UI"""
    bl_label = "Add Objects"
    bl_space_type = 'VIEW_3D'
    bl_region_type = 'UI'
    bl_category = "Add Objects"

    def draw(self, context):
        layout = self.layout

        row = layout.row()
        row.label(text="Add Mesh Objects:")

        row = layout.row(align=True)
        row.operator("mesh.primitive_cube_add", text="Cube", icon="MESH_CUBE")
        row.operator("mesh.primitive_plane_add", text="Plane", icon="MESH_PLANE")
        row = layout.row(align=True)
        row.operator("mesh.primitive_uv_sphere_add", text="UV Sphere", icon="MESH_UVSPHERE")
        row.operator("mesh.primitive_cylinder_add", text="Cylinder", icon="MESH_CYLINDER")
        
        row = layout.row()
        row.label(text="Add Curve Objects:")
        
        row = layout.row(align=True)
        row.operator("curve.primitive_bezier_curve_add", text="Bezier", icon="IPO_BEZIER")
        row.operator("curve.primitive_bezier_circle_add", text="Circle", icon="CURVE_BEZCIRCLE")
        
        row = layout.row()
        row.label(text="Mixed:")
        
        row = layout.row(align=True)
        row.operator("object.armature_add", text="Armature", icon="OUTLINER_OB_ARMATURE")
        row.operator("object.camera_add", text="Camera", icon="VIEW_CAMERA")


def register():
    bpy.utils.register_class(AddObjects)


def unregister():
    bpy.utils.unregister_class(AddObjects)


if __name__ == "__main__":
    register()