PythonScriptManager

"""
Python Script Manager

allows user to select a python (.py) script from directory and run it.
the script may be selected from a list and run in a command window or opened using a text editor
user can navigate folders in ROOT_DIRECTORY


TO DO:
    add 'troubleshoot' to open python intepreter in a separate cmd window
    integrate command window into GUI

"""
from Tkinter import *
import os
import subprocess

# ==== user specified configuration ===== #
# alter these constants to fit your desired root directory and text editor
ROOT_DIRECTORY = os.path.normpath('C:/PartyTime')
TEXT_EDITOR_PATH = os.path.normpath('C:/PROGRA~2/Vim/'+'vim74/gvim.exe')
TEXT_EDITOR_NAME = 'Vim'
#TEXT_EDITOR_PATH = os.path.normpath('C:/Windows/notepad.exe')
#TEXT_EDITOR_NAME = 'Notepad'


def main():
    """ starts up GUI """
    root = Tk()
    root.wm_title("Python Script Manager")
    app = App(root)
    root.mainloop()

class App:
    def __init__(self,master):
	"""
	initialises all GUI elements and populates with items from PartyTime folder
	"""
	self.master = master
	self.currentScript = StringVar()
	self.currentScript.set('-')
	self.currentPath = StringVar()
	self.path =  ROOT_DIRECTORY
	self.topDir = ROOT_DIRECTORY
	self.currentPath.set(self.path)

	frame = Frame(master)
	frame.grid(row=0)

	centre = Frame(frame,height = 380,width = 360)
	centre.grid(row=0,column = 1)

	# ===== padding ===== #
	leftPad = Frame(frame,height = 100,width = 10)
	leftPad.grid(row = 0,column =0)	
	rightPad = Frame(frame,height=100,width=10)
	rightPad.grid(row=0,column=2)
	botPad = Frame(frame,height=10,width = 300)
	botPad.grid(row=1,columnspan=3)

	# ===== controls region ===== #
	control = Frame(centre)
	control.grid(row=0)

	Button(control,text='Run',command=self.runScript,width=10).grid(row=3,column=0)
	Button(control,text=TEXT_EDITOR_NAME,command=self.openInTextEditor,width=10).grid(row=3,column=1)
	Button(control,text='Open',command=self.moveUp,width=10).grid(row=3,column=2)
	Button(control,text='Up',command=self.moveDown,width=10).grid(row=3,column=3)
	Button(control,text='Top Dir',command=self.setTopDir,width=10).grid(row=3,column=4)


	Label(control,text='Dir:').grid(row=0,column=0)
	Label(control,textvariable=self.currentPath,relief = SUNKEN,width=30).grid(row=0,column=1,columnspan=3)
	Button(control,text='View',command=self.openDir,width=8).grid(row=0,column=4)
	
	Label(control,text='Script:').grid(row=1,column=0)
	Label(control,textvariable=self.currentScript,relief = SUNKEN,width=30).grid(row=1,column=1,columnspan=3)
	
	Label(control,text='Arguments:').grid(row=2,column=0)
	self.argEntry = Entry(control,width=29)
	self.argEntry.grid(row=2,column=1,columnspan=3)
	
	# ===== folder contents ===== #
	boxHeight = 8
	browserFrame = Frame(centre)
	browserFrame.grid(row=1)
	folderScroll = Scrollbar(browserFrame)
	scriptScroll = Scrollbar(browserFrame)
	self.folderBox = Listbox(browserFrame,yscrollcommand=folderScroll.set,width=30,height =boxHeight)
	self.scriptBox = Listbox(browserFrame,yscrollcommand=scriptScroll.set,width=30,height =boxHeight)
	Label(browserFrame,text='Folders in current directory:').grid(row=0,column=2)
	Label(browserFrame,text='Scripts in current directory:').grid(row=0,column=0)
	self.folderBox.grid(row=1,column=2)
	folderScroll.grid(row=1,column=3)
	self.scriptBox.grid(row=1,column=0)
	scriptScroll.grid(row=1,column=1)
	
	folderScroll.config(command=self.folderBox.yview)
	scriptScroll.config(command=self.scriptBox.yview)
	
	self.updateLists()
	self.updateScriptDisplay()

    def updateLists(self):
	""" update lists of folders and scripts in current directory  """
	self.folderBox.delete(0, END) 
	self.scriptBox.delete(0, END)
	DIR = self.path
	folderList = [name for name in os.listdir(DIR)if not os.path.isfile(os.path.join(DIR, name))]
	scriptList = [name for name in os.listdir(DIR)if name[-3:]=='.py']

	for item in folderList:
	    self.folderBox.insert(END, item)

	for item in scriptList:
	    self.scriptBox.insert(END, item)

    def updateScriptDisplay(self):
	""" grabs and displays currently selected script in listbox """
	self.currentScript.set(self.scriptBox.get(ACTIVE))
        self.master.after(250, self.updateScriptDisplay)

    def setTopDir(self):
	""" changes current directory to ROOT_DIRECTORY """
	self.path = self.topDir
	self.currentPath.set(self.path)
	self.updateLists()
    
    def moveUp(self):
	""" includes selected folder in current directory  """
	(head,tail) = os.path.split(self.path)
	if self.folderBox.get(ACTIVE) != tail:
	    self.path = os.path.normpath(self.path+'/'+self.folderBox.get(ACTIVE))
	    self.currentPath.set(self.path)
	    self.updateLists()

    def moveDown(self):
	""" changes directory from current directory to parent directory, stops at ROOT_DIRECTORY"""
	if self.path != self.topDir:
	    (head,tail) = os.path.split(self.path)
	    self.path = head
	    self.currentPath.set(self.path)
	    self.updateLists()

    def runScript(self):
	""" runs script in cmd console """
	print '# ====== start script ====== #'
	args = self.argEntry.get()
	process = subprocess.Popen([sys.executable, self.currentScript.get(),args], cwd=self.path)
	process.wait()
	print '# ====== end script ====== #\n'

    def openInTextEditor(self):
	""" opens current script in text editor """
	target = os.path.normpath(self.path+'/'+self.currentScript.get())
	target = '"'+target+'"'
	#vimCmd = 
	textEditorCmd = TEXT_EDITOR_PATH
	commandString = textEditorCmd + ' ' + target
	subprocess.Popen(commandString)

    def openDir(self):
	""" opens current directory in windows explorer"""
	commandString = 'explorer '+self.path
	subprocess.Popen(commandString)


# ===== run main ===== #
if __name__ == '__main__':
    main()