; --------------------------------------------------------------------------
; PROCEDURE clear_stack_panel
; --------------------------------------------------------------------------
; PURPOSE:
;   This procedure clears the window and all the checkboxes 
;   and radio buttons on the stack_panel.  
;
PRO clear_stack_panel

   COMMON CIPS_GLOBAL_STATE, cips_global_options   
   COMMON STACK_PANEL_BTNS, stack_panel_buttons
   COMMON STACK_WINDOW_STATE, stack_window_options

   if n_elements(stack_window_options) eq 0 then return

   if (cips_global_options.is_stack eq 0) then return

   stack_window_options.view = ''
   stack_window_options.show_coast = 0
   stack_window_options.show_solar_zenith_angles = 0
   stack_window_options.show_scattering_angles = 0
   stack_window_options.show_view_angles = 0
   stack_window_options.surf_view = 0
   stack_window_options.n_rows = 1
   
   widget_control, stack_panel_buttons.sza_contours_btn, set_button=0  
   widget_control, stack_panel_buttons.scattering_contours_btn, set_button=0
   widget_control, stack_panel_buttons.view_contours_btn, set_button=0          
   widget_control, stack_panel_buttons.contour_btns, set_button=0
   widget_control, stack_panel_buttons.map_proj_btn, set_button=0
   widget_control, stack_panel_buttons.surf_view_btn, set_button=0
   
return
end