spreadView-class           package:iSPlot           R Documentation

_C_l_a_s_s "_s_p_r_e_a_d_V_i_e_w": _A _c_l_a_s_s _t_o _r_e_p_r_e_s_e_n_t _a _s_p_r_e_a_d_s_h_e_e_t _v_i_e_w

_D_e_s_c_r_i_p_t_i_o_n:

     spreadView is a class to represent a view that is a spreadsheet.
     spreadView inherits from the virtual class, genView.

_O_b_j_e_c_t_s _f_r_o_m _t_h_e _C_l_a_s_s:

     Objects can be created by calls of the form 'new("spreadView",
     ...)'.

_S_l_o_t_s:

     '_c_l_i_s_t': an object of class '"GtkCList"', i.e. the spreadsheet 

     '_d_a_t_a_N_a_m_e': a character string describing what data is shown in
          the view 

     '_w_i_n': an object of class '"GtkWindow"' that holds the view 

     '_w_i_n_N_u_m': a number that tells what number view this is (for
          example, the first view created will have winNum=1)

_E_x_t_e_n_d_s:

     Class '"genView"', directly.

_M_e_t_h_o_d_s:

     _c_l_i_c_k_E_v_e_n_t Handles button press events on a spreadsheet:
          identifies the row clicked and creates and handles a
          gUpdateDataMessage object depending on the whether the row
          was selected or unselected

     _c_l_i_s_t Returns the 'clist' slot 

     _c_l_i_s_t<- Sets the 'clist' slot 

     _v_i_e_w_U_p_d_a_t_e_D_a_t_a Called by the initialize method when creating an
          object of class, gUpdateDataMessage.  The viewUpdateData
          method determines how the data will be updated based on the
          view mode, the view object, and the location of the event
          (which row was selected in this case).  A list containing the
          slot values for the gUpdateDataMessage object is returned.

_A_u_t_h_o_r(_s):

     Elizabeth Whalen

_S_e_e _A_l_s_o:

     'genView-class', 'plotView-class', 'sPlotView-class',
     'gUpdateDataMessage-class'

_E_x_a_m_p_l_e_s:

       if (interactive())
       {
         createControlWindow()
         # should load data through Open Data or Open File under the File menu
         data(USArrests)
         loadDFData(USArrests,"USArrests")
         # plotting the data should occur through Plot Data under 
         # the Display menu
         createView(type = "spreadView", dataName = "USArrests") 
         # this will create an object of class, spreadView
         is(get("viewList",viewEnv)[[1]],"spreadView")  
       }

