You can now perform reciprocal conversions (e.g. s <-> Hz)

Fixed some bugs in unit-number ordering ("10 m^2" was interpreted as
"(10 m)^2", e-notation was ignored)

1 files changed, 19 insertions, 10 deletions

diff --git a/src/org/unitConverter/converterGUI/UnitConverterGUI.java b/src/org/unitConverter/converterGUI/UnitConverterGUI.java
index 0be6c9b..b84e730 100644
--- a/src/org/unitConverter/converterGUI/UnitConverterGUI.java
+++ b/src/org/unitConverter/converterGUI/UnitConverterGUI.java
@@ -247,20 +247,29 @@ final class UnitConverterGUI {
 				return;
 			}
 
-			// if I can't convert, leave
-			if (!from.canConvertTo(to)) {
+			if (from.canConvertTo(to)) {
+				value = from.convertTo(to, 1);
+
+				// round value
+				final String output = this.getRoundedString(value);
+
+				this.view.setExpressionConverterOutputText(
+						String.format("%s = %s %s", fromUnitString, output, toUnitString));
+			} else if (from instanceof LinearUnit && SI.ONE.dividedBy((LinearUnit) from).canConvertTo(to)) {
+				// reciprocal conversion (like seconds to hertz)
+				value = SI.ONE.dividedBy((LinearUnit) from).convertTo(to, 1);
+
+				// round value
+				final String output = this.getRoundedString(value);
+
+				this.view.setExpressionConverterOutputText(
+						String.format("1 / %s = %s %s", fromUnitString, output, toUnitString));
+			} else {
+				// if I can't convert, leave
 				this.view.showErrorDialog("Conversion Error",
 						String.format("Cannot convert between %s and %s", fromUnitString, toUnitString));
-				return;
 			}
 
-			value = from.convertTo(to, 1);
-
-			// round value
-			final String output = this.getRoundedString(value);
-
-			this.view.setExpressionConverterOutputText(
-					String.format("%s = %s %s", fromUnitString, output, toUnitString));
 		}
 
 		/**