scientific notation format

res/values-ru/text_strings.xml

@@ -20,6 +20,7 @@
 	<string name="c_prefs_main_category">Основные настройки</string>
 	<string name="c_prefs_calculations_category">Настройки вычислений</string>
 	<string name="c_prefs_appearance_category">Настройки внешнего вида</string>
+	<string name="c_prefs_other_category">Другие настройки</string>
 	<string name="c_prefs_drag_button_category">Настройки кнопок</string>
 
 
@@ -41,6 +42,8 @@
 	<string name="c_calc_color_display_title">Подсветка выражений</string>
 	<string name="c_calc_round_result_title">Округление результата</string>
 	<string name="c_calc_round_result_summary">Включает/выключает округление результата</string>
+	<string name="c_calc_science_notation_title">Результат в научной форме</string>
+	<string name="c_calc_science_notation_summary">Если включено - результат будет всегда записан в научной форме (12.34E-12)</string>
 	<string name="p_calc_result_precision_title">Точность результата</string>
 	<string name="c_exit">Выход</string>
 	<string name="c_add">Добавить</string>

res/values/preferences.xml

@@ -33,6 +33,9 @@
 	<string name="p_calc_round_result_key">org.solovyev.android.calculator.CalculatorModel_round_result</string>
 	<string name="p_calc_round_result">true</string>
 
+	<string name="p_calc_science_notation_key">calculation.output.science_notation</string>
+	<string name="p_calc_science_notation">false</string>
+
 	<string name="p_calc_functions">org.solovyev.android.calculator.CalculatorModel_functions</string>
 	<string name="p_calc_vars">org.solovyev.android.calculator.CalculatorModel_vars</string>
 	<string name="p_calc_history">org.solovyev.android.calculator.CalculatorModel_history</string>

res/values/text_strings.xml

@@ -20,6 +20,7 @@
 	<string name="c_prefs_main_category">Main settings</string>
 	<string name="c_prefs_calculations_category">Calculation settings</string>
 	<string name="c_prefs_appearance_category">Appearance settings</string>
+	<string name="c_prefs_other_category">Other settings</string>
 	<string name="c_prefs_drag_button_category">Drag buttons settings</string>
 
 
@@ -41,6 +42,8 @@
 	<string name="c_calc_color_display_title">Highlight expressions</string>
 	<string name="c_calc_round_result_title">Round result</string>
 	<string name="c_calc_round_result_summary">Toggles rounding of the result</string>
+	<string name="c_calc_science_notation_title">Always scientific notation</string>
+	<string name="c_calc_science_notation_summary">If turned on forces to use only scientific notation of output (12.34E-12)</string>
 	<string name="p_calc_result_precision_title">Precision of result</string>
 	<string name="c_exit">Exit</string>
 	<string name="c_add">Add</string>

res/xml/preferences.xml

@@ -10,12 +10,12 @@
 			a:defaultValue="false"
 			/>
 
-	<PreferenceCategory a:title="@string/c_prefs_calculations_category">
-
 	<org.solovyev.android.ads.AdViewPreference
 			a:key="admob_01"
 			a:layout="@layout/admob_pref"/>
 
+	<PreferenceScreen a:title="@string/c_prefs_calculations_category">
+
 		<android.preference.CheckBoxPreference
 				a:key="@string/p_calc_round_result_key"
 				a:summary="@string/c_calc_round_result_summary"
@@ -29,18 +29,18 @@
 				a:defaultValue="5"
 				range:boundaries="0;16"/>
 
+		<android.preference.CheckBoxPreference
+				a:key="@string/p_calc_science_notation_key"
+				a:summary="@string/c_calc_science_notation_summary"
+				a:title="@string/c_calc_science_notation_title"
+				a:defaultValue="false"/>
+
 		<ListPreference a:key="@string/p_calc_grouping_separator_key"
 						a:title="@string/c_calc_grouping_separator"
 						a:entries="@array/p_grouping_separator_names"
 						a:summary="@string/c_calc_grouping_separator_summary"
 						a:entryValues="@array/p_grouping_separator_values"/>
 
-		<ListPreference a:key="@string/p_calc_multiplication_sign_key"
-						a:title="@string/c_calc_multiplication_sign"
-						a:entries="@array/p_multiplication_sign_values"
-						a:summary="@string/c_calc_multiplication_sign_summary"
-						a:entryValues="@array/p_multiplication_sign_values"/>
-
 		<ListPreference a:key="@string/p_calc_angle_units_key"
 						a:title="@string/c_calc_angle_units"
 						a:entries="@array/p_angle_units_names"
@@ -53,14 +53,10 @@
 						a:summary="@string/c_numeral_bases_summary"
 						a:entryValues="@array/p_numeral_bases"/>
 
-	</PreferenceCategory>
+	</PreferenceScreen>
 
-
+	<PreferenceScreen
-	<PreferenceCategory a:title="@string/c_prefs_appearance_category">
+			a:title="@string/c_prefs_appearance_category">
-
-		<org.solovyev.android.ads.AdViewPreference
-			 a:key="admob_02"
-			 a:layout="@layout/admob_pref"/>
 
 		<android.preference.CheckBoxPreference
 				a:key="@string/p_calc_color_display_key"
@@ -80,6 +76,12 @@
 						a:summary="@string/p_calc_haptic_feedback_duration_summary"
 						a:entryValues="@array/p_calc_haptic_feedback_duration_values"/>
 
+		<ListPreference a:key="@string/p_calc_multiplication_sign_key"
+						a:title="@string/c_calc_multiplication_sign"
+						a:entries="@array/p_multiplication_sign_values"
+						a:summary="@string/c_calc_multiplication_sign_summary"
+						a:entryValues="@array/p_multiplication_sign_values"/>
+
 		<ListPreference a:key="@string/p_calc_theme_key"
 						a:title="@string/c_calc_theme"
 						a:entries="@array/p_theme_names"
@@ -102,19 +104,7 @@
 				range:steps="10"
 				range:boundaries="10;500"/>
 
-		<android.preference.CheckBoxPreference
+		<!--	  <org.solovyev.android.prefs.FloatRangeSeekBarPreference
-				a:key="@string/p_calc_show_release_notes_key"
-				a:summary="@string/c_calc_show_release_notes_summary"
-				a:title="@string/c_calc_show_release_notes_title"
-				a:defaultValue="true"/>
-
-		<android.preference.CheckBoxPreference
-				a:key="@string/p_calc_use_back_button_as_prev_key"
-				a:summary="@string/c_calc_use_back_button_as_prev_summary"
-				a:title="@string/c_calc_use_back_button_as_prev_title"
-				a:defaultValue="false"/>
-
-<!--	  <org.solovyev.android.prefs.FloatRangeSeekBarPreference
 									  a:key="@string/p_drag_duration_key"
 									  a:title="Duration of drag event"
 									  a:text=" ms"
@@ -129,6 +119,23 @@
 									  a:defaultValue="0;45"
 									  range:steps="5"
 									  range:boundaries="0;45"/>-->
-	</PreferenceCategory>
+	</PreferenceScreen>
+
+	<PreferenceScreen
+			a:title="@string/c_prefs_other_category">
+
+		<android.preference.CheckBoxPreference
+				a:key="@string/p_calc_show_release_notes_key"
+				a:summary="@string/c_calc_show_release_notes_summary"
+				a:title="@string/c_calc_show_release_notes_title"
+				a:defaultValue="true"/>
+
+		<android.preference.CheckBoxPreference
+				a:key="@string/p_calc_use_back_button_as_prev_key"
+				a:summary="@string/c_calc_use_back_button_as_prev_summary"
+				a:title="@string/c_calc_use_back_button_as_prev_title"
+				a:defaultValue="false"/>
+
+	</PreferenceScreen>
 
 </PreferenceScreen>

src/main/java/org/solovyev/android/calculator/model/CalculatorEngine.java

@@ -47,6 +47,9 @@ public enum CalculatorEngine {
 	private static final String MULTIPLICATION_SIGN_P_KEY = "org.solovyev.android.calculator.CalculatorActivity_calc_multiplication_sign";
 	private static final String MULTIPLICATION_SIGN_DEFAULT = "×";
 
+	private static final String SCIENCE_NOTATION_P_KEY = "calculation.output.science_notation";
+	private static final boolean SCIENCE_NOTATION_DEFAULT = false;
+
 	private static final String ROUND_RESULT_P_KEY = "org.solovyev.android.calculator.CalculatorModel_round_result";
 	private static final boolean ROUND_RESULT_DEFAULT = true;
 
@@ -66,8 +69,10 @@ public enum CalculatorEngine {
 		public static final Preference<Boolean> roundResult = new BooleanPreference(ROUND_RESULT_P_KEY, ROUND_RESULT_DEFAULT);
 		public static final Preference<NumeralBase> numeralBase = StringPreference.newInstance(NUMERAL_BASES_P_KEY, NUMERAL_BASES_DEFAULT, EnumMapper.newInstance(NumeralBase.class));
 		public static final Preference<AngleUnit> angleUnit = StringPreference.newInstance(ANGLE_UNITS_P_KEY, ANGLE_UNITS_DEFAULT, EnumMapper.newInstance(AngleUnit.class));
+		public static final Preference<Boolean> scienceNotation = new BooleanPreference(SCIENCE_NOTATION_P_KEY, SCIENCE_NOTATION_DEFAULT);
 
 		private static final List<String> preferenceKeys = new ArrayList<String>();
+
 		static {
 			preferenceKeys.add(groupingSeparator.getKey());
 			preferenceKeys.add(multiplicationSign.getKey());
@@ -75,6 +80,7 @@ public enum CalculatorEngine {
 			preferenceKeys.add(roundResult.getKey());
 			preferenceKeys.add(numeralBase.getKey());
 			preferenceKeys.add(angleUnit.getKey());
+			preferenceKeys.add(scienceNotation.getKey());
 		}
 
 		@NotNull
@@ -255,7 +261,7 @@ public enum CalculatorEngine {
 
 				if (parseExceptionObject != null || evalExceptionObject != null) {
 					if (operation == JsclOperation.numeric &&
-							( preparedExpression.isExistsUndefinedVar() || ( evalExceptionObject != null && evalExceptionObject.getCause() instanceof NumeralBaseException)) ) {
+							(preparedExpression.isExistsUndefinedVar() || (evalExceptionObject != null && evalExceptionObject.getCause() instanceof NumeralBaseException))) {
 						return evaluate(JsclOperation.simplify, expression, mr);
 					}
 
@@ -296,21 +302,7 @@ public enum CalculatorEngine {
 
 	public void reset(@Nullable Context context, @Nullable SharedPreferences preferences) {
 		synchronized (lock) {
-			if (preferences != null) {
+			softReset(context, preferences);
-				this.setPrecision(Preferences.precision.getPreference(preferences));
-				this.setRoundResult(Preferences.roundResult.getPreference(preferences));
-				this.setAngleUnits(getAngleUnitsFromPrefs(preferences));
-				this.setNumeralBase(getNumeralBaseFromPrefs(preferences));
-				this.setMultiplicationSign(Preferences.multiplicationSign.getPreference(preferences));
-
-				final String groupingSeparator = Preferences.groupingSeparator.getPreference(preferences);
-				if (StringUtils.isEmpty(groupingSeparator)) {
-					this.getEngine().setUseGroupingSeparator(false);
-				} else {
-					this.getEngine().setUseGroupingSeparator(true);
-					this.getEngine().setGroupingSeparator(groupingSeparator.charAt(0));
-				}
-			}
 
 			varsRegistry.load(context, preferences);
 			functionsRegistry.load(context, preferences);
@@ -327,6 +319,7 @@ public enum CalculatorEngine {
 				this.setAngleUnits(getAngleUnitsFromPrefs(preferences));
 				this.setNumeralBase(getNumeralBaseFromPrefs(preferences));
 				this.setMultiplicationSign(Preferences.multiplicationSign.getPreference(preferences));
+				this.setScienceNotation(Preferences.scienceNotation.getPreference(preferences));
 
 				final String groupingSeparator = Preferences.groupingSeparator.getPreference(preferences);
 				if (StringUtils.isEmpty(groupingSeparator)) {
@@ -391,6 +384,10 @@ public enum CalculatorEngine {
 		getEngine().setAngleUnits(angleUnits);
 	}
 
+	public void setScienceNotation(boolean scienceNotation) {
+		getEngine().setScienceNotation(scienceNotation);
+	}
+
 	public void setNumeralBase(@NotNull NumeralBase numeralBase) {
 		getEngine().setNumeralBase(numeralBase);
 	}

src/test/java/org/solovyev/android/calculator/model/CalculatorEngineTest.java

@@ -261,6 +261,14 @@ public class CalculatorEngineTest {
 		Assert.assertEquals("∫((ln(2)+ln(5))/ln(x), x)", cm.getEngine().simplify("∫(log(x, 10), x)"));
 	}
 
+	@Test
+	public void testFormatting() throws Exception {
+		final CalculatorEngine ce = CalculatorEngine.instance;
+
+		Assert.assertEquals("12 345", ce.evaluate(JsclOperation.simplify, "12345").getResult());
+
+	}
+
 	@Test
 	public void testI() throws CalculatorParseException, CalculatorEvalException {
 		final CalculatorEngine cm = CalculatorEngine.instance;