() -> ( )

android-app-core/res/layout/cpp_simple_button_round_brackets.xml

@@ -8,5 +8,5 @@
 
 <Button xmlns:a="http://schemas.android.com/apk/res/android"
 	a:id="@id/cpp_button_round_brackets"
-	a:text="()"
+	a:text="(  )"
 	style="@style/cpp_simple_metro_digit_button_style" />

android-app/res/layout/cpp_drag_button_round_brackets.xml

@@ -10,7 +10,7 @@
 	xmlns:c="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
 	a:id="@id/cpp_button_round_brackets"
 	c:textUp="("
-	a:text="()"
+	a:text="(  )"
 	c:textDown=")"
 	c:textLeft="(…)"
 	c:directionTextScale="0.5;0.5;0.5;0.33"

core/src/main/java/org/solovyev/android/calculator/CalculatorKeyboardImpl.java

@@ -1,9 +1,10 @@
 package org.solovyev.android.calculator;
 
+import org.solovyev.android.calculator.math.MathType;
+import org.solovyev.common.text.Strings;
+
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
-import org.solovyev.android.calculator.math.MathType;
-import org.solovyev.common.text.Strings;
 
 /**
  * User: serso
@@ -29,6 +30,12 @@ public class CalculatorKeyboardImpl implements CalculatorKeyboard {
 			boolean processed = processSpecialButtons(text);
 
 			if (!processed) {
+				processText(prepareText(text));
+			}
+		}
+	}
+
+	private void processText(@Nonnull String text) {
 		int cursorPositionOffset = 0;
 		final StringBuilder textToBeInserted = new StringBuilder(text);
 
@@ -56,6 +63,13 @@ public class CalculatorKeyboardImpl implements CalculatorKeyboard {
 		final CalculatorEditor editor = Locator.getInstance().getEditor();
 		editor.insert(textToBeInserted.toString(), cursorPositionOffset);
 	}
+
+	@Nonnull
+	private String prepareText(@Nonnull String text) {
+		if ("(  )".equals(text)) {
+			return "()";
+		} else {
+			return text;
 		}
 	}