Example of creating sub panels in blender

sub_panels.py

# made in response to http://blender.stackexchange.com/q/60583/935

bl_info = {
    "version": (1, 0),
    "blender": (2, 75, 0),
    "author": "sambler",
    "name": "Sample Panel with subpanels addon",
    "description": """Sample addon to demonstrate displaying sub-panels within a panel""" ,
    "category": "test",
}

import bpy

class MultiDataPanel(bpy.types.Panel):
    """testing panel showing multiple subpanels"""
    bl_label = 'Multi data Panel'
    bl_idname = 'OBJECT_PT_multidata'
    bl_space_type = 'VIEW_3D'
    bl_region_type = 'TOOLS'

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

        box = layout.box()
        col = box.column()
        row = col.row()
        if scn.show_options_01:
            row.prop(scn, "show_options_01", icon="DOWNARROW_HLT", text="", emboss=False)
        else:
            row.prop(scn, "show_options_01", icon="RIGHTARROW", text="", emboss=False)

        row.label('First sub panel')
        if scn.show_options_01:
            # Add items from other panels draw method here
            row = col.row()
            row.label('Render resolution')
            row = col.row()
            col = row.column(align=True)
            col.prop(scn.render, 'resolution_x', text='X')
            col.prop(scn.render, 'resolution_y', text='Y')

            row = col.row()
            row.label('and more rows for other data')
            # end of other panels draw method

        box = layout.box()
        col = box.column()
        row = col.row()
        if scn.show_options_02:
            row.prop(scn, "show_options_02", icon="DOWNARROW_HLT", text="", emboss=False)
        else:
            row.prop(scn, "show_options_02", icon="RIGHTARROW", text="", emboss=False)

        row.label('Second sub panel')
        if scn.show_options_02:
            # Add items from other panels draw method here
            row = col.row()
            row.label('Frame range')
            row = col.row()
            col = row.column(align=True)
            col.prop(scn, 'frame_start', text='Start Frame')
            col.prop(scn, 'frame_end', text='End Frame')
            col.prop(scn, 'frame_step', text='Frame Step')
            row = col.row()
            row.label('and more rows for other data')
            # end of other panels draw method

        box = layout.box()
        col = box.column()
        row = col.row()
        if scn.show_options_03:
            row.prop(scn, "show_options_03", icon="DOWNARROW_HLT", text="", emboss=False)
        else:
            row.prop(scn, "show_options_03", icon="RIGHTARROW", text="", emboss=False)

        row.label('Third sub panel')
        if scn.show_options_03:
            # Add items from other panels draw method here
            row = col.row()
            row.label('Render output')
            row = col.row()
            col = row.column(align=True)
            col.prop(scn.render, 'filepath')
            row = col.row()
            row.label('and more rows for other data')
            # end of other panels draw method


def register():
    bpy.utils.register_class(MultiDataPanel)
    bpy.types.Scene.show_options_01 = bpy.props.BoolProperty(name='Show 1st panel', default=False)
    bpy.types.Scene.show_options_02 = bpy.props.BoolProperty(name='Show 2nd panel', default=False)
    bpy.types.Scene.show_options_03 = bpy.props.BoolProperty(name='Show 3rd panel', default=False)

def unregister():
    del bpy.types.Scene.show_options_01
    del bpy.types.Scene.show_options_02
    del bpy.types.Scene.show_options_03
    bpy.utils.unregister_class(MultiDataPanel)

if __name__ == "__main__":
    register()


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