Styling the operator panel

We know that the operator panel is displayed in these circumstances:

• When context.window_manager.invoke_props_dialog is called explicitly.
• When bl_options is set to {'REGISTER', 'UNDO'} and the operator has finished.
• When Edit | Adjust Last Operation is called. This circumstance too requires the presence of bl_options = {'REGISTER', 'UNDO'}.

By default, all properties are displayed in a column layout. Most property types can be declared with a hidden=True flag, but that’s not the case for BoolProperty, so we cannot do it with set_hours.

As a workaround, we could change set_hours to IntProperty, with a 0 to 1 range and hidden set to True, but by implementing the draw method for our operator, we can just omit the properties that we don’t want to display.

Writing the draw method

We want to change two things in the Create Hour/Minutes Text panel:

• The hour and minutes...