symbolic calculations added

res/layout-land/main.xml

@@ -25,9 +25,9 @@
 																   calc:directionTextScale="0.5"
 																   style="?controlButtonStyle"
 																   a:onClick="moveLeftButtonClickHandler"
-																   a:layout_width="fill_parent"
+																   a:layout_width="0dp"
 																   a:layout_height="fill_parent"
-																   a:layout_weight="1.5"/>
+																   a:layout_weight="1"/>
 
 
 			<org.solovyev.android.view.widgets.ColorButton xmlns:a="http://schemas.android.com/apk/res/android"
@@ -36,15 +36,15 @@
 														   a:drawableTop="@drawable/sym_keyboard_delete"
 														   style="?controlImageButtonStyle"
 														   a:onClick="eraseButtonClickHandler"
-														   a:layout_width="fill_parent"
+														   a:layout_width="0dp"
 														   a:layout_height="fill_parent"
-														   a:layout_weight="1.5"/>
+														   a:layout_weight="1"/>
 
 
 			<include layout="@layout/calc_display"
-					 a:layout_width="fill_parent"
+					 a:layout_width="0dp"
 					 a:layout_height="fill_parent"
-					 a:layout_weight="1"/>
+					 a:layout_weight="4"/>
 
 			<org.solovyev.android.view.widgets.ColorButton xmlns:a="http://schemas.android.com/apk/res/android"
 														   xmlns:calc="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
@@ -53,9 +53,9 @@
 														   a:textStyle="bold"
 														   style="?controlImageButtonStyle"
 														   a:onClick="clearButtonClickHandler"
-														   a:layout_width="fill_parent"
+														   a:layout_width="0dp"
 														   a:layout_height="fill_parent"
-														   a:layout_weight="1.5"/>
+														   a:layout_weight="1"/>
 
 			<org.solovyev.android.view.widgets.DirectionDragButton xmlns:a="http://schemas.android.com/apk/res/android"
 																   xmlns:calc="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
@@ -65,9 +65,9 @@
 																   calc:directionTextScale="0.5"
 																   style="?controlButtonStyle"
 																   a:onClick="moveRightButtonClickHandler"
-																   a:layout_width="fill_parent"
+																   a:layout_width="0dp"
 																   a:layout_height="fill_parent"
-																   a:layout_weight="1.5"/>
+																   a:layout_weight="1"/>
 
 		</LinearLayout>
 
@@ -80,6 +80,7 @@
 			<include layout="@layout/calc_three_digit_button"/>
 			<include layout="@layout/calc_multiplication_button"/>
 			<include layout="@layout/calc_division_button"/>
+			<include layout="@layout/calc_equals_button"/>
 
 		</LinearLayout>
 
@@ -92,19 +93,20 @@
 			<include layout="@layout/calc_six_digit_button"/>
 			<include layout="@layout/calc_plus_button"/>
 			<include layout="@layout/calc_subtraction_button"/>
+			<include layout="@layout/calc_empty_button"/>
 
 		</LinearLayout>
 
 		<LinearLayout a:layout_weight="1" a:layout_width="fill_parent" a:layout_height="0dp">
 
 			<include layout="@layout/calc_donate_button"/>
-			<include layout="@layout/calc_square_brackets_button"/>
+			<include layout="@layout/calc_empty_button"/>
 			<include layout="@layout/calc_seven_digit_button"/>
 			<include layout="@layout/calc_eight_digit_button"/>
 			<include layout="@layout/calc_nine_digit_button"/>
 			<include layout="@layout/calc_zero_digit_button"/>
 			<include layout="@layout/calc_round_brackets_button"/>
-
+			<include layout="@layout/calc_square_brackets_button"/>
 
 		</LinearLayout>
 

res/layout-port/main.xml

@@ -16,7 +16,13 @@
 
 		<LinearLayout a:layout_weight="1" a:layout_width="fill_parent" a:layout_height="0dp">
 
+			<include layout="@layout/calc_equals_button"
+					 a:layout_weight="4"
+					 a:layout_width="fill_parent"
+					 a:layout_height="fill_parent"/>
+
 			<include layout="@layout/calc_display"
+					 a:layout_weight="1"
 					 a:layout_width="fill_parent"
 					 a:layout_height="fill_parent"/>
 

res/layout/calc_display.xml

@@ -10,7 +10,6 @@
 		xmlns:a="http://schemas.android.com/apk/res/android"
 		a:id="@+id/calculatorDisplay"
 		style="@style/display_style"
-		a:layout_weight="1"
 		a:minLines="1"
 		a:maxLines="1"
 		a:textStyle="bold"

res/layout/calc_empty_button.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+<org.solovyev.android.view.widgets.DirectionDragButton xmlns:a="http://schemas.android.com/apk/res/android"
+													   xmlns:calc="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
+													   style="?controlButtonStyle"/>

res/layout/calc_equals_button.xml

@@ -7,8 +7,11 @@
   -->
 <org.solovyev.android.view.widgets.DirectionDragButton
 		xmlns:a="http://schemas.android.com/apk/res/android"
+		xmlns:calc="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
 		a:id="@+id/equalsButton"
+		calc:textUp="≡"
 		a:text="="
+		calc:directionTextScale="0.5"
 		a:layout_width="fill_parent"
 		a:layout_height="fill_parent"
 		style="?controlButtonStyle"