indexing description: "Help engine, displays help context, Windows implementation" class WIZARD_HELP_ENGINE_IMP inherit WIZARD_HELP_ENGINE_I WIZARD_SHARED create make feature {NONE} -- Initialization make is -- Create HTML Help handler. do create hh_handler internal_show_successful := True ensure hh_handler /= Void last_show_successful: last_show_successful end feature -- Status Report last_show_successful: BOOLEAN is -- Was last call to `show' successful? do Result := internal_show_successful end last_error_message: STRING is -- Last error message, if any do Result := internal_error_message end feature -- Basic Operations show (a_help_context: WIZARD_HELP_CONTEXT) is -- Show help with context `a_help_context'. do hh_handler.show (Url_prefix + a_help_context.url) internal_show_successful := hh_handler.last_show_successful if not internal_show_successful then internal_error_message := Generic_error_message end end feature -- Access Eiffel_key: STRING is "ISE_EIFFEL" -- Environment variable for Eiffel delivery Url_prefix: STRING is -- Path to `wizard.chm' (relatively to $ISE_EIFFEL value) once Result := wizard_source + "\wizard.chm::" ensure non_void_path: Result /= Void not_empty_path: not Result.is_empty end feature {NONE} -- Implementation internal_show_successful: BOOLEAN -- Was last call to `show' successful? internal_error_message: STRING -- Last error message, if any hh_handler: WIZARD_HTML_HELP_HANDLER -- Control content of Microsoft HTML Help Generic_error_message: STRING is "Could not display the help topic, please check your Eiffel installation." -- Error message displayed when topic could not be displayed end -- class WIZARD_HELP_ENGINE --|---------------------------------------------------------------- --| EiffelWizard: library of reusable components for ISE Eiffel. --| Copyright (C) 1986-2001 Interactive Software Engineering Inc. --| All rights reserved. Duplication and distribution prohibited. --| May be used only with ISE Eiffel, under terms of user license. --| Contact ISE for any other use. --| --| Interactive Software Engineering Inc. --| ISE Building --| 360 Storke Road, Goleta, CA 93117 USA --| Telephone 805-685-1006, Fax 805-685-6869 --| Electronic mail --| Customer support: http://support.eiffel.com> --| For latest info see award-winning pages: http://www.eiffel.com --|----------------------------------------------------------------