MForms boxes rendering random indents (no replies)

Hello,

I am facing a problem with a Python plugin UI that randomly changes the MForms panel/box indent on subsequent dialog displays.

When executing the plugin a dialog is displayed:

https://pasteboard.co/I5pggx5.png

This is the correct rendering (the _ _ before the sub check boxes is just to show there is some intended indent).

Now closing the dialog and redisplaying the dialog results in random indents for all 4 sub boxes below the one with the dropdown box:

Wrongly rendered dialogs:

https://pasteboard.co/I5pgPNe.png
https://pasteboard.co/I5ph8Ea.png
https://pasteboard.co/I5phnPC.png
https://pasteboard.co/I5phwCE.png
https://pasteboard.co/I5pibOi.png

Notice the random left indents with all other images.

**QUESTION**:

What's wrong here? Why is this happening?

Here's the code for a full example. You only have to hook this into a Python plugin:

def ask_for_options():

    # main tab
    main_bx = create_relationships_box()

    # build tab view
    main_tv = TabView(False)
    main_tv.add_page(main_bx, 'Relationships')
    main_tv.set_active_tab(0)
    main_tv.relayout()

    # buttons
    export_btn = Button()
    export_btn.set_text('Export')

    cancel_btn = Button()
    cancel_btn.set_text('Cancel')

    # button box
    buttons_bx = Box(True)
    buttons_bx.set_spacing(5)
    buttons_bx.set_padding(3)

    # uses OS-specific positioning
    Utilities.add_end_ok_cancel_buttons(buttons_bx, export_btn, cancel_btn)

    # main + button boxes
    content_bx = Box(False)
    content_bx.set_spacing(5)
    content_bx.set_padding(5)

    content_bx.add(main_tv, True, True)
    content_bx.add(buttons_bx, False, True)

    # create centered options dialog
    form = Form(None, FormDialogFrame)
    form.set_title('Export Options')
    form.set_content(content_bx)
    form.set_size(500, 260)
    form.center()

    all_valid = False

    # check validity on return
    while not all_valid and form.run_modal(export_btn, cancel_btn):
        all_valid = True

    form.close()  # needed?

    return all_valid


def create_relationships_box():

    collection_full_class_name_se = Selector()

    # collection class name (x-to-many)
    collection_full_class_name_bx = Box(True)

    collection_full_class_name = Label('Default collection class for @XToMany:')
    collection_full_class_name.set_wrap_text(False)

    collection_type_names = ['Set', 'Collection', 'List', 'Map']

    collection_full_class_name_se.add_items(collection_type_names)
    collection_full_class_name_se.set_value(collection_type_names[0])

    collection_full_class_name_bx.add(collection_full_class_name, False, True)
    collection_full_class_name_bx.add(collection_full_class_name_se, False, True)

    # special collection mapping annotations
    special_collection_mappings_bx = Box(True)

    special_collection_mappings_ck = CheckBox()
    special_collection_mappings_ck.set_text('Detect special collection mapping annotations in foreign key comments')
    special_collection_mappings_ck.set_active(True)

    special_collection_mappings_bx.add(special_collection_mappings_ck, False, True)

    # special collection mapping writablility
    writable_on_order_or_map_key_column_bx = Box(True)

    writable_on_order_or_map_key_column_ck = CheckBox()
    writable_on_order_or_map_key_column_ck.set_text('Put writable onto @OrderColumn or @MapKeyColumn if detected')
    writable_on_order_or_map_key_column_ck.set_active(True)

    # add dummy indentation
    add_indentation_to(writable_on_order_or_map_key_column_bx)  # dummy indentation label
    writable_on_order_or_map_key_column_bx.add(writable_on_order_or_map_key_column_ck, False, True)

    # join tables
    pure_join_tables_bx = Box(True)

    pure_join_tables_as_many_to_many_ck = CheckBox()
    pure_join_tables_as_many_to_many_ck.set_text('Map pure join tables as @ManyToMany + @JoinTable')
    pure_join_tables_as_many_to_many_ck.set_active(True)

    pure_join_tables_bx.add(pure_join_tables_as_many_to_many_ck, False, True)

    # join table order columns
    join_table_special_collection_mappings_bx = Box(True)

    join_table_special_collection_mappings_ck = CheckBox()
    join_table_special_collection_mappings_ck.set_text('Consider special collection mapping annotations for pure join table detection')
    join_table_special_collection_mappings_ck.set_active(True)

    # add dummy indentation
    add_indentation_to(join_table_special_collection_mappings_bx)  # dummy indentation label
    join_table_special_collection_mappings_bx.add(join_table_special_collection_mappings_ck, False, True)

    collection_mapping_bx = Box(False)
    collection_mapping_bx.set_spacing(2)
    collection_mapping_bx.set_padding(3)
    collection_mapping_bx.set_homogeneous(True)
    collection_mapping_bx.add(collection_full_class_name_bx, False, True)
    collection_mapping_bx.add(special_collection_mappings_bx, False, True)
    collection_mapping_bx.add(writable_on_order_or_map_key_column_bx, False, True)
    collection_mapping_bx.add(pure_join_tables_bx, False, True)
    collection_mapping_bx.add(join_table_special_collection_mappings_bx, False, True)

    collection_mapping_pn = Panel(TitledGroupPanel)
    collection_mapping_pn.set_title('Collection Mapping')
    collection_mapping_pn.add(collection_mapping_bx)

    tab_bx = Box(False)
    tab_bx.set_spacing(3)
    tab_bx.set_padding(3)

    tab_bx.add(collection_mapping_pn, False, True)

    return tab_bx


def add_indentation_to(bx):
    """Add a (somewhat faked) indentation label to a box."""
    bx.add(Label('_ _'), False, True)

Can the team please look into this issue?

I have no idea why this is happening and the code looks correct to me.

Here's a plugin stub:

@ModuleInfo.plugin("wb.catalog.util.custom_plugin",
                   caption="Custom Plugin...",
                   input=[wbinputs.currentCatalog()],
                   pluginMenu='Catalog')
@ModuleInfo.export(grt.INT, grt.classes.db_Catalog)
def custom_plugin(catalog):

    print "Executing custom_plugin(catalog)..."

    ask_for_options()
    return 0

Please help.

Karsten