fix bug with TextViewer instance in debug mode, appears after transferring new program on PLC
TextViewer isn't able to display debug values, so calling for this class SubscribeAllDataConsumers method causes error
<?xml version="1.0"?>
<!-- generated by wxGlade HG on Wed Oct 02 23:48:24 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>wxCAPTION|wxCLOSE_BOX|wxMINIMIZE_BOX|wxMAXIMIZE|wxMAXIMIZE_BOX|wxSYSTEM_MENU|wxRESIZE_BORDER|wxCLIP_CHILDREN</style>
<title>frame_1</title>
<object class="wxFlexGridSizer" name="grid_sizer_1" base="EditFlexGridSizer">
<hgap>0</hgap>
<growable_rows>0</growable_rows>
<rows>1</rows>
<growable_cols>0</growable_cols>
<cols>2</cols>
<vgap>0</vgap>
<object class="sizeritem">
<flag>wxEXPAND</flag>
<border>0</border>
<option>1</option>
<object class="ThreeDee" name="window_1" base="CustomWidget">
<arguments>
<argument>$parent</argument>
<argument>$id</argument>
</arguments>
<size>400,400</size>
</object>
</object>
<object class="sizeritem">
<flag>wxEXPAND</flag>
<border>0</border>
<option>1</option>
<object class="wxFlexGridSizer" name="sizer_1" base="EditFlexGridSizer">
<hgap>0</hgap>
<rows>2</rows>
<cols>1</cols>
<vgap>0</vgap>
<object class="sizeritem">
<flag>wxEXPAND</flag>
<border>0</border>
<option>1</option>
<object class="wxBoxSizer" name="sizer_2" base="EditBoxSizer">
<orient>wxVERTICAL</orient>
<object class="sizerslot" />
<object class="sizerslot" />
<object class="sizerslot" />
<object class="sizerslot" />
</object>
</object>
<object class="sizeritem">
<flag>wxEXPAND</flag>
<border>0</border>
<option>1</option>
<object class="wxGridSizer" name="sizer_3" base="EditGridSizer">
<hgap>0</hgap>
<rows>4</rows>
<cols>2</cols>
<vgap>0</vgap>
<object class="sizerslot" />
<object class="sizerslot" />
<object class="sizerslot" />
<object class="sizerslot" />
<object class="sizerslot" />
<object class="sizerslot" />
<object class="sizerslot" />
<object class="sizerslot" />
</object>
</object>
</object>
</object>
</object>
</object>
</application>