note description: "Object used to cache the DPI value, and provide scaled_size function." date: "$Date$" revision: "$Revision$" class EVS_DPI_SCALER create make, make_with_dpi feature {NONE} -- Initialization make do make_with_dpi ({EV_MONITOR_DPI_DETECTOR_IMP}.dpi) end make_with_dpi (a_dpi: like dpi) require a_dpi > 0 do update_dpi (a_dpi) end feature -- DPI handling dpi: NATURAL -- Return the dots per inch (dpi) of the monitor -- DPI sizes 96, 120, 144, 192, etc. do Result := dpi_cache end scaled_size (a_size: INTEGER): INTEGER -- Scaled size of `a_size`. local l_dpi: like dpi do Result := a_size l_dpi := dpi if l_dpi > 0 then Result := (Result * (l_dpi / 96)).rounded end end feature -- Element change update_dpi (a_dpi: NATURAL) require a_dpi > 0 do dpi_cache := a_dpi ensure dpi_cache_updated: dpi_cache = a_dpi.to_natural_32 or else dpi_cache /= 0 end feature {NONE} -- Implementation dpi_cache: like dpi ;note copyright: "Copyright (c) 1984-2021, Eiffel Software" license: "GPL version 2 (see http://www.eiffel.com/licensing/gpl.txt)" licensing_options: "http://www.eiffel.com/licensing" copying: "[ This file is part of Eiffel Software's Eiffel Development Environment. Eiffel Software's Eiffel Development Environment is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2 of the License (available at the URL listed under "license" above). Eiffel Software's Eiffel Development Environment is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Eiffel Software's Eiffel Development Environment; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ]" source: "[ Eiffel Software 5949 Hollister Ave., Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Website http://www.eiffel.com Customer support http://support.eiffel.com ]" end