Function: spd_ui_add_variable Purpose: Widget for selecting a variable in the GUI Input: guiId: standard ID of the master widget loadedData: object containing loadedData guiTree: pointer to the widget tree historywin: history window object statusBar: status bar object Output: Returns an array of strings containing the selected data Keywords: multi: allow multple selections control: no interpolation; match the selected data to the control variable point-by-point leafonly: only allow the user to select a leaf treemode: selection mode for the tree widget. See the header of the spd_ui_widget_tree object for details windowtitle: override the default window title $LastChangedBy: jimm $ $LastChangedDate: 2014-02-11 10:54:32 -0800 (Tue, 11 Feb 2014) $ $LastChangedRevision: 14326 $ $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/spedas/gui/panels/spd_ui_add_variable.pro $