clear variable location cell in variable panel, if variable class or type changed
if variable class is not local or global, or variable type is not locatable, variable location cell would be empty and read-only
<?xml version="1.0"?>
<!-- generated by wxGlade 0.6.4 on Thu May 16 13:24:16 2013 -->
<application path="" name="" class="" option="0" language="python" top_window="wxglade_hmi" encoding="UTF-8" use_gettext="0" overwrite="0" use_new_namespace="1" for_version="2.8" is_template="0" indent_amount="4" indent_symbol="space" source_extension=".cpp" header_extension=".h">
<object class="Class_wxglade_hmi" name="wxglade_hmi" base="EditFrame">
<style>wxDEFAULT_FRAME_STYLE</style>
<title>frame_1</title>
<object class="wxStaticBoxSizer" name="sizer_1" base="EditStaticBoxSizer">
<orient>wxVERTICAL</orient>
<label>Wiimote Test</label>
<object class="sizeritem">
<flag>wxEXPAND</flag>
<border>0</border>
<option>0</option>
<object class="wxButton" name="button_1" base="EditButton">
<label>Connect Wiimote</label>
<events>
<handler event="EVT_BUTTON">OnConnectButton</handler>
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</object>
<object class="sizeritem">
<flag>wxEXPAND</flag>
<border>0</border>
<option>0</option>
<object class="wxButton" name="button_2" base="EditButton">
<label>Disconnect Wiimote</label>
<events>
<handler event="EVT_BUTTON">OnDisconnectButton</handler>
</events>
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</object>
<object class="sizeritem">
<flag>wxEXPAND</flag>
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<object class="wxStaticText" name="label_1" base="EditStaticText">
<attribute>1</attribute>
<label>Status :</label>
</object>
</object>
<object class="sizeritem">
<flag>wxEXPAND</flag>
<border>0</border>
<option>0</option>
<object class="wxStaticText" name="label_2" base="EditStaticText">
<attribute>1</attribute>
<label>no status</label>
</object>
</object>
</object>
</object>
</application>