[gcalctool] Put Arg into scientific buttons

[Robert Ancell <rancell src gnome org>]

commit aa663f5e0cb588d5d6d938ef89db950732978fc2
Author: Robert Ancell <robert ancell gmail com>
Date:   Mon Jun 7 10:59:51 2010 +1000

    Put Arg into scientific buttons

 data/buttons-advanced.ui |    8 ++++----
 src/math-buttons.c       |    3 +++
 2 files changed, 7 insertions(+), 4 deletions(-)
---
diff --git a/data/buttons-advanced.ui b/data/buttons-advanced.ui
index 35d08ed..b0d7777 100644
--- a/data/buttons-advanced.ui
+++ b/data/buttons-advanced.ui
@@ -762,8 +762,8 @@
               </packing>
             </child>
             <child>
-              <object class="GtkButton" id="calc_real_portion_button">
-                <property name="label">&#x211C;</property>
+              <object class="GtkButton" id="calc_conjugate_button">
+                <property name="label">conj</property>
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="receives_default">True</property>
@@ -800,8 +800,8 @@
               </packing>
             </child>
             <child>
-              <object class="GtkButton" id="calc_conjugate_button">
-                <property name="label">conj</property>
+              <object class="GtkButton" id="calc_arg_button">
+                <property name="label">Arg</property>
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="receives_default">True</property>
diff --git a/src/math-buttons.c b/src/math-buttons.c
index f67523b..60bec85 100644
--- a/src/math-buttons.c
+++ b/src/math-buttons.c
@@ -142,6 +142,9 @@ static ButtonData button_data[] = {
     {"abs",                "|", FUNCTION,
       /* Tooltip for the absolute value button */
       N_("Absolute value [|]")},
+    {"arg",                "Arg ", FUNCTION,
+      /* Tooltip for the complex argument component button */
+      N_("Complex argument")},
     {"conjugate",          "conj ", FUNCTION,
       /* Tooltip for the complex conjugate button */
       N_("Complex conjugate")},