C:/mesDocs/QT_confDbVis_canvas/helper.py

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###################################################################################################################
# This module is a container class for functions that does not belong to any particular module. A collection of ###
# useful functions that can be used in any module.                                                              ###
###################################################################################################################

#from wxPython.wx import *

OC = __import__('objectclasses') # We have to import the objectclasses module this way (using the load module function)
                                 # because or else we will get a recursive including/importing of objectclasses and helper


##
#  Flattens a list. If we f.ex. have a list like [[[2],2],[[[3,3],4],4],5,6], 
#       then this function will convert it to [2,2,3,3,4,4,5,5] recursively. Because 
#       it is done recursively the list shouldn't have too many levels.
#       
def flatten(my_list):

        if type(my_list) != type([]): 
                return [my_list]
        if my_list == []: 
                return my_list

        return flatten(my_list[0]) + flatten(my_list[1:])

##
#  prepends and appends a quote sign to a string, and returns it.
# 
#       @string - the string that will be quoted
# 
#       !return - the quoted string
#       
def prepostquotes(thestring):

        return '"' + thestring + '"'
'''
##
#  Drag and drop text functionality class.
#       
#           Here we define what that should be done on drop
#       
class TextDropTarget(wxTextDropTarget):

        ##
        #  Constructor.
        # 
        #                   Parameters:
        #                   @obj     - The object associated with the drop
        #                   @mainwin - The MainWindow instance (for communication)
        #               
        def __init__(self,obj,mainwin):
                
                wxTextDropTarget.__init__(self)

                self.obj = obj
                self.appwin = mainwin

        ##
        #  Method that is invoked on the drop of an object.
        # 
        #                   Parameters:
        #                   @x - x position (coord) of the dropped object
        #                   @y - y position (coord) of the dropped object
        #                   @data - data (string) set to the dropped object
        #               
        def OnDropText(self,x,y,data):
                
                tmp_info = data.split("|") # We have defined a string to be associated with every drag and drop object
                                           # First part is the systemname, second part the name of the object type dropped
                                           # They are separated by a '|'.

                if tmp_info[2] == "Device":
                        tmp_devices = self.appwin.CreateDeviceClick(None) # Open Create Device Window

                        if tmp_devices != False and len(tmp_devices) > 0: # If we created one or more devices...
                                i = 0
                                for tmp_device in tmp_devices: # Lay them out nicely in the visual window
                                        x_offset,y_offset = self.appwin.GetVisWindow().CalcUnscrolledPosition(x,y+i)
                                        self.appwin.GetVisWindow().CreateNode(x_offset,y_offset,tmp_device)
                                        i += 5

                else: #So far, only support for Devices...
                        print "Dropped an unknown object type"
                                
'''

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