class Application(tk.Frame):
__is_verbose = s.IS_VERBOSE
__is_saved = False
__parking_spaces = None
__control_points = None
__camera = None
__camera_is_active = False
SETUP_IMAGE = "./images/setup.jpeg"
DEFAULT_IMAGE = "./images/default.jpeg"
def __init__(self, master=None):
tk.Frame.__init__(self, master)
self.grid()
self.__createDisplay()
self.__createMenu()
self.__parking_spaces = Boxes(self.display, type=0)
self.__control_points = Boxes(self.display, type=1)
self.bind("<Return>", self.returnPressHandler)
self.bind("<Key>", self.keyPressHandler)
self.bind("<Escape>", self.escapePressHandler)
self.display.bind("<Button-1>", self.leftClickHandler)
self.display.bind("<Button-3>", self.rightClickHandler)
self.focus_set()
def loadImage(self, image_address, canvas, width, height):
canvas.delete(tk.ALL)
try:
if not isinstance(canvas, tk.Canvas): raise TypeError
if not isinstance(image_address, str): raise TypeError
if not isinstance(width, int): raise TypeError
if not isinstance(height, int): raise TypeError
photo = ImageTk.PhotoImage(Image.open(image_address))
canvas.create_image((width, height), image=photo)
canvas.image = photo
return True
except TypeError:
if self.__is_verbose:
print "ERROR: loadImage() arguments of incorrect data type."
return False
except:
# image failed to load
if self.__is_verbose:
print "ERROR: loadImage() failed to load image " + image_address
return False
def turnOnCamera(self):
tkMessageBox.showinfo(
title="",
message="Press the ENTER key to take a new setup image " +
"or the ESCAPE key to cancel.")
try:
self.__camera = imageread.setup_camera(is_fullscreen=True)
self.__camera.awb_mode = 'auto'
self.__camera.exposure_mode = 'auto'
self.__camera.start_preview()
self.__camera_is_active = True
except:
tkMessageBox.showerror(
title="Error!",
message="Error: Failed to setup and start PiCam.")
def saveData(self):
f1 = open('./setup_data.py', 'w+')
print >> f1, 'boxes = ['
for i in range(self.__parking_spaces.length()):
space = self.__parking_spaces.get(i).getOutput()
if space != None:
o = (i)
print >> f1, space, ','
for j in range(self.__control_points.length()):
cp = self.__control_points.get(j).getOutput()
if cp != None:
o = (i)
print >> f1, cp, ','
print >> f1, ']'
self.__is_saved = True
if self.__is_verbose: print 'INFO: Data saved in file setup_data.py.'
tkMessageBox.showinfo(title="Setup",
message="Data saved successfully.")
def loadData(self):
try:
import setup_data
reload(setup_data)
except:
if self.__is_verbose:
print "ERROR: Problem loading data from ./setup_data.py"
tkMessageBox.showerror(
title="Error!",
message="Problem loading data from setup_data.py")
self.__is_saved = True
return setup_data.boxes
def checkData(self):
if self.__is_verbose: print "INFO: Data is being checked for validity."
try:
import setup_data
reload(setup_data)
box_data = setup_data.boxes
if not box_data: raise ValueError
except ImportError:
if self.__is_verbose:
print "ERROR: Problem loading data from ./setup_data.py"
except ValueError:
if self.__is_verbose:
print "ERROR: ./setup_data.py 'boxes' is empty."
except:
if self.__is_verbose:
print "ERROR: ./setup_data.py does not contain 'boxes'."
space_boxes = []
control_boxes = []
for data_set in box_data:
if data_set[1] == 0:
space_boxes.append(data_set)
elif data_set[1] == 1:
control_boxes.append(data_set)
elif self.__is_verbose:
print "ERROR: Box-type not set to either 0 or 1."
if len(space_boxes) > 0 and len(control_boxes) == 3:
valid_data = True
else:
valid_data = False
if self.__is_verbose: print "INFO: Data checked. Data is", valid_data
return valid_data
def register(self):
if not self.__is_saved:
response = tkMessageBox.askokcancel(
title="Save Setup",
message="Setup data must be saved before the registration" +
" process can be completed. Would you like to save now?")
if response:
self.saveData()
else:
tkMessageBox.showinfo(title="Setup",
message="Registration not completed.")
return
if not self.checkData():
tkMessageBox.showinfo(
title="Setup",
message="Registration not complete.\n\nSaved data is " +
"invalid. Please ensure that there are 3 control points and " +
"at least 1 parking spaces marked.")
return
try:
import setup_data
reload(setup_data)
boxes = setup_data.boxes
if not isinstance(boxes, list): raise ValueError()
except:
print "ERROR: Setup data does not exist. Please run options 1 and 2 first."
return
try:
import senddata
except:
print "ERROR: Could not import send data file."
return
# start fresh
out = senddata.deregister_pi()
try:
out['error']
print "ERROR: Error in connecting to server. Please update settings.py."
return
except:
pass
for box in boxes:
if box[1] == 0:
output = senddata.register_area(box[0])
if "error" in output.keys():
if self.__is_verbose: print "ERROR:", output["error"]
return
else:
if self.__is_verbose:
print "INFO: Registering area", box[0], "on server."
# print success message
if self.__is_verbose: print "\nINFO: Server registration successful."
def returnPressHandler(self, event):
self.focus_set()
if not self.__camera_is_active or not self.__camera: return
try:
self.__camera.capture(self.SETUP_IMAGE)
self.__camera.stop_preview()
self.__camera.close()
self.__camera_is_active = False
if self.__is_verbose:
print "INFO: New setup image captured."
print "INFO: PiCam deactivated."
except:
# image failed to capture, show error message
tkMessageBox.showerror(
title="Error!",
message="Error: Failed to capture new setup image.")
# load the new setup image
self.loadImage(self.SETUP_IMAGE, self.display,
s.PICTURE_RESOLUTION[0] / 2,
s.PICTURE_RESOLUTION[1] / 2)
self.cps_button.config(state=tk.ACTIVE)
self.spaces_button.config(state=tk.ACTIVE)
def escapePressHandler(self, event):
self.focus_set()
if not self.__camera_is_active or not self.__camera: return
try:
# close the camera without taking new image
self.__camera.stop_preview()
self.__camera.close()
self.__camera_is_active = False
if self.__is_verbose:
print "INFO: PiCam deactivated."
except:
# image failed to close for some reason, show error message
if self.__is_verbose:
print "ERROR: PiCam failed to close correctly."
def keyPressHandler(self, event):
"""Handle key-press events for numeric keys. """
key = event.char
NUM_KEYS = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '0']
if key in NUM_KEYS:
if self.spaces_button.getIsActive():
self.__parking_spaces.setCurrentBox(int(key))
if self.cps_button.getIsActive():
# ignore all other numbers, but 1, 2 and 3 as 3 is the maximum
# number of control points allowed.
if key not in ['1', '2', '3']: return
# NB: -1 from key press, because list indices are [0, 1, 2],
# but for ease of user selection the numbers 1, 2, 3 are used
# for input
self.__control_points.setCurrentBox(int(key) - 1)
def leftClickHandler(self, event):
# ensure focus on display canvas to recieve mouse clicks
self.display.focus_set()
# perform correct operation, dependent on which toggle button is active
# add new control points (max = 3)
if self.cps_button.getIsActive():
if self.__is_verbose: print "INFO: Add Control Point"
self.__is_saved = False
this_cp_id = self.__control_points.getCurrentBox()
this_cp = self.__control_points.boxes[this_cp_id]
this_cp.updatePoints(event.x, event.y)
# add new parking space
elif self.spaces_button.getIsActive():
if self.__is_verbose: print "INFO: Add Parking Space"
self.__is_saved = False
this_space_id = self.__parking_spaces.getCurrentBox()
this_space = self.__parking_spaces.boxes[this_space_id]
this_space.updatePoints(event.x, event.y)
# do nothing -- ignore LMB clicks
else:
if self.__is_verbose: print "INFO: Just clicking LMB merrily =D"
# return focus to the main frame for key-press events
self.focus_set()
def rightClickHandler(self, event):
# ensure focus is set to the display canvas
self.display.focus_set()
# perform correct operation, dependent on which toggle button is active
if self.cps_button.getIsActive():
if self.__is_verbose: print "INFO: Remove Control Point"
self.__is_saved = False
self.__control_points.boxes[
self.__control_points.getCurrentBox()].clear()
self.__control_points.boxes[
self.__control_points.getCurrentBox()].deleteRectangle(
self.display)
elif self.spaces_button.getIsActive():
if self.__is_verbose: print "INFO: Remove parking space"
self.__is_saved = False
self.__parking_spaces.boxes[
self.__parking_spaces.getCurrentBox()].clear()
self.__parking_spaces.boxes[
self.__parking_spaces.getCurrentBox()].deleteRectangle(
self.display)
else:
if self.__is_verbose: print "INFO: Just clicking RMB merrily =)"
# return focus to the main frame for key-press events
self.focus_set()
def clickStart(self):
"""
Close the current setup application, then initiate the main
PiPark program.
"""
if self.__is_verbose: print "ACTION: Clicked 'Start'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
# set initial responses
response = False
response1 = False
response2 = False
# if setup data has not been saved. Ask user if they would like to save
# before continuing.
if not self.__is_saved:
response = tkMessageBox.askyesno(
title="Save Setup",
type=tkMessageBox.YESNOCANCEL,
message="Most recent changes to setup have not been saved." +
"Would you like to save before running PiPark?")
if response: self.saveData()
# data is saved, ask the user if they are sure they wish to quit.
else:
response = tkMessageBox.askyesno(
title="Save Setup",
message="Are you ready to leave setup and run PiPark?")
# user wishes to quit setup and run pipark, so do it!
if response:
# ensure data is valid before continuing
if not self.checkData():
# data invalid, so display message and return
tkMessageBox.showinfo(
title="Setup",
message="Saved data is invalid. Please ensure that " +
"there are 3 control points and at least 1 parking " +
"space marked.")
return
self.quit_button.invoke()
if self.__is_verbose: print "INFO: Setup application terminated. "
main.main()
def clickRegister(self):
"""Register the car park with the server. """
if self.__is_verbose: print "ACTION: Clicked 'Register'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
self.register()
def clickNewImage(self):
"""Use PiCam to take new 'setup image' for PiPark setup. """
if self.__is_verbose: print "ACTION: Clicked 'Capture New Image'"
self.__is_saved = False
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
self.__parking_spaces.clearAll(self.display)
self.__control_points.clearAll(self.display)
self.turnOnCamera()
def clickSave(self):
if self.__is_verbose: print "ACTION: Clicked Save'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
self.saveData()
def clickLoad(self):
if self.__is_verbose: print "ACTION: Clicked 'Load'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
if not self.loadImage(self.SETUP_IMAGE, self.display,
s.PICTURE_RESOLUTION[0] / 2,
s.PICTURE_RESOLUTION[1] / 2):
tkMessageBox.showerror(
title="Error!",
message="Error loading setup image." +
" Please ensure setup image exists as ./image/setup_image.jpeg."
)
return
# clear all previous data, and activate buttons
self.clear_button.invoke()
self.cps_button.config(state=tk.ACTIVE)
self.spaces_button.config(state=tk.ACTIVE)
def clickClear(self):
if self.__is_verbose: print "ACTION: Clicked 'Clear'"
self.__is_saved = False
# clear all data points, to start afresh
self.__parking_spaces.clearAll(self.display)
self.__control_points.clearAll(self.display)
def clickSpaces(self):
"""Add/remove parking-space bounding boxes. """
if self.__is_verbose: print "ACTION: Clicked 'Add/Remove Spaces'"
# toggle the button, and turn off other toggle buttons
self.spaces_button.toggle()
if self.cps_button.getIsActive(): self.cps_button.setOff()
def clickCPs(self):
"""Add/remove control points. """
if self.__is_verbose: print "ACTION: Clicked 'Add/Remove CPs'"
# toggle the button, and turn off other toggle buttons
self.cps_button.toggle()
if self.spaces_button.getIsActive(): self.spaces_button.setOff()
def clickQuit(self):
"""Quit & terminate the application. """
if self.__is_verbose: print "ACTION: Clicked 'Quit'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
response = True
# if the user hasn't recently saved, ask if they really wish to quit
if not self.__is_saved:
response = tkMessageBox.askyesno(
title="Quit?",
message="Are you sure you wish to quit?" +
"All unsaved setup will be lost.")
if response:
# user wishes to quit, destroy the application
self.quit()
self.master.destroy()
def clickAbout(self):
"""Open the README file for instructions on GUI use. """
if self.__is_verbose: print "ACTION: Clicked 'Open README'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
# load external README from command line
# TODO: Put this in new Tkinter window with scroll bar
os.system("leafpad " + "./SETUP_README.txt")
if self.__is_verbose:
print "INFO: Opened ./SETUP_README.txt in leafpad."
def __createDisplay(self):
self.display = tk.Canvas(self,
width=s.PICTURE_RESOLUTION[0],
height=s.PICTURE_RESOLUTION[1])
self.display.grid(row=2, column=0, rowspan=1, columnspan=6)
def __createMenu(self):
"""Create a tkinter canvas in which to hold the menu buttons. """
# padding around buttons
PADDING = 10
# start the main program
self.start_button = tk.Button(self,
text="Start",
command=self.clickStart,
padx=PADDING)
self.start_button.grid(row=0,
column=0,
sticky=tk.W + tk.E + tk.N + tk.S)
# take new setup image button
self.image_button = tk.Button(self,
text="Capture New Setup Image",
command=self.clickNewImage,
padx=PADDING)
self.image_button.grid(row=0,
column=1,
rowspan=1,
columnspan=3,
sticky=tk.W + tk.E + tk.N + tk.S)
# save setup data & image
self.save_button = tk.Button(self,
text="Save",
command=self.clickSave,
padx=PADDING)
self.save_button.grid(row=1,
column=1,
sticky=tk.W + tk.E + tk.N + tk.S)
# load setup data & image
self.load_button = tk.Button(self,
text="Load",
command=self.clickLoad,
padx=PADDING)
self.load_button.grid(row=1,
column=2,
sticky=tk.W + tk.E + tk.N + tk.S)
# clear all parking spaces and CPs
self.clear_button = tk.Button(self,
text="Clear",
command=self.clickClear,
padx=PADDING)
self.clear_button.grid(row=1,
column=3,
sticky=tk.W + tk.E + tk.N + tk.S)
# add/remove spaces button
self.spaces_button = ToggleButton(self)
self.spaces_button.config(text="Add/Remove Spaces",
command=self.clickSpaces,
padx=PADDING,
state=tk.DISABLED)
self.spaces_button.grid(row=0,
column=4,
rowspan=1,
columnspan=2,
sticky=tk.W + tk.E + tk.N + tk.S)
# add/remove control points button
self.cps_button = ToggleButton(self)
self.cps_button.config(text="Add/Remove Control Points",
command=self.clickCPs,
padx=PADDING,
state=tk.DISABLED)
self.cps_button.grid(row=1,
column=4,
rowspan=1,
columnspan=2,
sticky=tk.W + tk.E + tk.N + tk.S)
# quit setup
self.quit_button = tk.Button(self,
text="Quit",
command=self.clickQuit,
padx=PADDING)
self.quit_button.grid(row=1,
column=0,
sticky=tk.W + tk.E + tk.N + tk.S)
def getIsVerbose():
return self.__is_verbose
def setIsVerbose(value):
if isinstance(value, bool): self.__is_verbose = value
class Application(tk.Frame):
# --------------------------------------------------------------------------
# Instance Attributes
# --------------------------------------------------------------------------
# booleans
__is_verbose = s.IS_VERBOSE # print messages to terminal
__is_saved = False
# lists to hold parking space and control point references
__parking_spaces = None
__control_points = None
# picamera
__camera = None
__camera_is_active = False
# image load/save locoations
SETUP_IMAGE = "./images/setup.jpeg"
DEFAULT_IMAGE = "./images/default.jpeg"
# --------------------------------------------------------------------------
# Constructor Method
# --------------------------------------------------------------------------
def __init__(self, master = None):
"""Application constructor method. """
# run super constructor method
tk.Frame.__init__(self, master)
# set alignment inside the frame
self.grid()
# create widgets
self.__createDisplay() # display canvas: holds the image, CPs and spaces
self.__createMenu() # menu canvas: holds the buttons and menu bar image
# lists to hold parking space and control point references
self.__parking_spaces = Boxes(self.display, type = 0)
self.__control_points = Boxes(self.display, type = 1)
# create mouse button and key-press handlers -> set focus to this frame
self.bind("<Return>", self.returnPressHandler)
self.bind("<Key>", self.keyPressHandler)
self.bind("<Escape>", self.escapePressHandler)
self.display.bind("<Button-1>", self.leftClickHandler)
self.display.bind("<Button-3>", self.rightClickHandler)
self.focus_set()
if self.__is_verbose:
print "INFO: __parking_spaces length:", self.__parking_spaces.length()
print "INFO: __control_points length:", self.__control_points.length()
# load the default background
self.loadImage(self.DEFAULT_IMAGE, self.display,
s.PICTURE_RESOLUTION[0]/2, s.PICTURE_RESOLUTION[1]/2)
# ==============================================================================
#
# Public Application Methods
#
# ==============================================================================
# --------------------------------------------------------------------------
# Load Image
# --------------------------------------------------------------------------
def loadImage(self, image_address, canvas, width, height):
"""
Load image at image_address. If the load is successful then return True,
otherwise return False.
Keyword Arguments:
image_address -- The address of the image to be loaded (default = './').
canvas -- The Tkinter Canvas into which the image is loaded.
width -- Width of the image to load.
height -- Height of the image to load.
Returns:
Boolean -- True if load successful, False if not.
"""
# clear the old canvas
canvas.delete(tk.ALL)
try:
# guard against incorrect argument datatypes
if not isinstance(canvas, tk.Canvas): raise TypeError
if not isinstance(image_address, str): raise TypeError
if not isinstance(width, int): raise TypeError
if not isinstance(height, int): raise TypeError
# load the image into the canvas
photo = ImageTk.PhotoImage(Image.open(image_address))
canvas.create_image((width, height), image = photo)
canvas.image = photo
# image load successful
return True
except TypeError:
# arguments of incorrect data type, load unsuccessful
if self.__is_verbose:
print "ERROR: loadImage() arguments of incorrect data type."
return False
except:
# image failed to load
if self.__is_verbose:
print "ERROR: loadImage() failed to load image " + image_address
return False
# --------------------------------------------------------------------------
# Activate the Pi Camera
# --------------------------------------------------------------------------
def turnOnCamera(self):
"""
Instruct the user how to take a new setup image, then activate
the PiCam. If the camera fails to load, catch the exception and present
error message.
"""
# show quick dialogue box with basic instruction
tkMessageBox.showinfo(title = "",
message = "Press the ENTER key to take a new setup image "
+ "or the ESCAPE key to cancel.")
try:
# initialise the camera using the settings in the imageread module
self.__camera = imageread.setup_camera(is_fullscreen = True)
self.__camera.start_preview()
self.__camera_is_active = True
if self.__is_verbose: print "INFO: PiCam activated."
except:
# camera failed to load, display error message
tkMessageBox.showerror(title = "Error!",
message = "Error: Failed to setup and start PiCam.")
# --------------------------------------------------------------------------
# Save Data
# --------------------------------------------------------------------------
def saveData(self):
"""Save the CP and parking space reference data to ./setup_data.py. """
# Open the file to output the co-ordinates to
f1 = open('./setup_data.py', 'w+')
# Print the dictionary data to the file
print >> f1, 'boxes = ['
# for every parking space, save the data to ./setup_data.py
for i in range(self.__parking_spaces.length()):
space = self.__parking_spaces.get(i).getOutput()
# ignore the space if no data present
if space != None:
o = (i)
print >> f1, space, ','
# for every control point, save the data to ./setup_data.py
for j in range(self.__control_points.length()):
cp = self.__control_points.get(j).getOutput()
# ignore the CP if no data present
if cp != None:
o = (i)
print >> f1, cp, ','
# save to ./setup_data.py
print >> f1, ']'
self.__is_saved = True
if self.__is_verbose: print 'INFO: Data saved in file setup_data.py.'
tkMessageBox.showinfo(title = "PiPark Setup",
message = "Data saved successfully.")
# --------------------------------------------------------------------------
# Load Data
# --------------------------------------------------------------------------
def loadData(self):
try:
# load the setup data, reload to refresh the data
import setup_data
reload(setup_data)
except:
if self.__is_verbose:
print "ERROR: Problem loading data from ./setup_data.py"
tkMessageBox.showerror(
title = "Error!",
message = "Problem loading data from setup_data.py"
)
self.__is_saved = True
return setup_data.boxes
# --------------------------------------------------------------------------
# Check Data
# --------------------------------------------------------------------------
def checkData(self):
"""
Check that the setup data meets the following criteria:
1) There is at least 1 parking space.
2) There are exactly 3 control points.
Returns:
Boolean -- True if criteria is met, False if not.
"""
if self.__is_verbose: print "INFO: Data is being checked for validity."
# get the boxes data to check from setup_data
try:
# load the setup data
import setup_data
reload(setup_data)
# ensure that boxes exists and is not empty
box_data = setup_data.boxes
if not box_data: raise ValueError
except ImportError:
if self.__is_verbose:
print "ERROR: Problem loading data from ./setup_data.py"
except ValueError:
if self.__is_verbose:
print "ERROR: ./setup_data.py 'boxes' is empty."
except:
if self.__is_verbose:
print "ERROR: ./setup_data.py does not contain 'boxes'."
# create lists to hold data of each type
space_boxes = []
control_boxes = []
# append the box data to space or control list as appropriate
for data_set in box_data:
if data_set[1] == 0:
space_boxes.append(data_set)
elif data_set[1] == 1:
control_boxes.append(data_set)
elif self.__is_verbose:
print "ERROR: Box-type not set to either 0 or 1."
# data is valid if there is at least 1 space and exactly 3 control points
if len(space_boxes) > 0 and len(control_boxes) == 3:
valid_data = True
else:
valid_data = False
if self.__is_verbose: print "INFO: Data checked. Data is", valid_data
return valid_data
# --------------------------------------------------------------------------
# Register Data
# --------------------------------------------------------------------------
def register(self):
"""Register the Pi with the server. """
# if setup hasn't been saved recently since last change, ask the if
# user to save first
if not self.__is_saved:
response = tkMessageBox.askokcancel(title = "Save Setup",
message = "Setup data must be saved before the registration"
+ " process can be completed. Would you like to save now?")
# if user selects 'yes' save the data and continue, else do not
# register the pi
if response:
self.saveData()
else:
tkMessageBox.showinfo(title = "PiPark Setup",
message = "Registration not completed.")
return
# check that most recent saved data is valid (#CPs == 3, #Spaces > 0)
if not self.checkData():
# data invalid, so display message and return
tkMessageBox.showinfo(
title = "PiPark Setup",
message = "Registration not complete.\n\nSaved data is "
+ "invalid. Please ensure that there are 3 control points and "
+ "at least 1 parking spaces marked."
)
return
# attempt to import the setup data and ensure 'boxes' is a list
try:
import setup_data
reload(setup_data)
boxes = setup_data.boxes
if not isinstance(boxes, list): raise ValueError()
except:
print "ERROR: Setup data does not exist. Please run options 1 and 2 first."
return
# attempt to import the server senddata module
try:
import senddata
except:
print "ERROR: Could not import send data file."
return
# deregister all areas associated with this pi (start fresh)
out = senddata.deregister_pi()
try:
out['error']
print "ERROR: Error in connecting to server. Please update settings.py."
return
except:
pass
# register each box on the server
for box in boxes:
if box[1] == 0:
output = senddata.register_area(box[0])
if "error" in output.keys():
if self.__is_verbose: print "ERROR:", output["error"]
return
else:
if self.__is_verbose:
print "INFO: Registering area", box[0], "on server."
# print success message if verbose
if self.__is_verbose: print "\nINFO: Server registration successful."
# ==============================================================================
#
# Event Handlers
#
# ==============================================================================
# --------------------------------------------------------------------------
# Return-key-press Event Handler
# --------------------------------------------------------------------------
def returnPressHandler(self, event):
"""
Handle Return-key-press events. Capture a new setup image when PiCam
is active, and load the image.
"""
# ensure focus on window
self.focus_set()
# do nothing if camera is not active, or no camera object exists
if not self.__camera_is_active or not self.__camera: return
try:
# capture new setup image, then close the camera
self.__camera.capture(self.SETUP_IMAGE)
self.__camera.stop_preview()
self.__camera.close()
self.__camera_is_active = False
if self.__is_verbose:
print "INFO: New setup image captured."
print "INFO: PiCam deactivated."
except:
# image failed to capture, show error message
tkMessageBox.showerror(title = "Error!",
message = "Error: Failed to capture new setup image.")
# load the new setup image
self.loadImage(self.SETUP_IMAGE, self.display,
s.PICTURE_RESOLUTION[0]/2, s.PICTURE_RESOLUTION[1]/2)
# activate buttons if they're disabled
self.cps_button.config(state = tk.ACTIVE)
self.spaces_button.config(state = tk.ACTIVE)
# --------------------------------------------------------------------------
# Escape-key-press Event Handler
# --------------------------------------------------------------------------
def escapePressHandler(self, event):
# ensure focus on window
self.focus_set()
# do nothing if camera is not active, or no camera object exists
if not self.__camera_is_active or not self.__camera: return
try:
# close the camera without taking new image
self.__camera.stop_preview()
self.__camera.close()
self.__camera_is_active = False
if self.__is_verbose:
print "INFO: PiCam deactivated."
except:
# image failed to close for some reason, show error message
if self.__is_verbose:
print "ERROR: PiCam failed to close correctly."
# --------------------------------------------------------------------------
# Key-press Event Handler
# --------------------------------------------------------------------------
def keyPressHandler(self, event):
"""Handle key-press events for numeric keys. """
key = event.char
NUM_KEYS = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '0']
if key in NUM_KEYS:
if self.__is_verbose: print "INFO: Number-key pressed", key
if self.spaces_button.getIsActive():
self.__parking_spaces.setCurrentBox(int(key))
if self.cps_button.getIsActive():
# ignore all other numbers, but 1, 2 and 3 as 3 is the maximum
# number of control points allowed.
if key not in ['1', '2', '3']: return
# NB: -1 from key press, because list indices are [0, 1, 2],
# but for ease of user selection the numbers 1, 2, 3 are used
# for input
self.__control_points.setCurrentBox(int(key) - 1)
# --------------------------------------------------------------------------
# LMB Event Handler
# --------------------------------------------------------------------------
def leftClickHandler(self, event):
"""Handle LMB-click events to add/remove control points & spaces. """
# ensure focus on display canvas to recieve mouse clicks
self.display.focus_set()
# perform correct operation, dependent on which toggle button is active
# add new control points (max = 3)
if self.cps_button.getIsActive():
if self.__is_verbose: print "INFO: Add Control Point"
self.__is_saved = False
this_cp_id = self.__control_points.getCurrentBox()
this_cp = self.__control_points.boxes[this_cp_id]
this_cp.updatePoints(event.x, event.y)
# add new parking space
elif self.spaces_button.getIsActive():
if self.__is_verbose: print "INFO: Add Parking Space"
self.__is_saved = False
this_space_id = self.__parking_spaces.getCurrentBox()
this_space = self.__parking_spaces.boxes[this_space_id]
this_space.updatePoints(event.x, event.y)
# do nothing -- ignore LMB clicks
else:
if self.__is_verbose: print "INFO: Just clicking LMB merrily =D"
# return focus to the main frame for key-press events
self.focus_set()
# --------------------------------------------------------------------------
# RMB Event Handler
# --------------------------------------------------------------------------
def rightClickHandler(self, event):
"""Handle RMB-click events to add/remove control points & spaces. """
# ensure focus is set to the display canvas
self.display.focus_set()
# perform correct operation, dependent on which toggle button is active
if self.cps_button.getIsActive():
if self.__is_verbose: print "INFO: Remove Control Point"
self.__is_saved = False
self.__control_points.boxes[self.__control_points.getCurrentBox()].clear()
self.__control_points.boxes[self.__control_points.getCurrentBox()].deleteRectangle(self.display)
elif self.spaces_button.getIsActive():
if self.__is_verbose: print "INFO: Remove parking space"
self.__is_saved = False
self.__parking_spaces.boxes[self.__parking_spaces.getCurrentBox()].clear()
self.__parking_spaces.boxes[self.__parking_spaces.getCurrentBox()].deleteRectangle(self.display)
else:
if self.__is_verbose: print "INFO: Just clicking RMB merrily =)"
# return focus to the main frame for key-press events
self.focus_set()
# ==============================================================================
#
# Button Handlers
#
# ==============================================================================
def clickStart(self):
"""
Close the current setup application, then initiate the main
PiPark program.
"""
if self.__is_verbose: print "ACTION: Clicked 'Start'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
# set initial responses
response = False
response1 = False
response2 = False
# if setup data has not been saved. Ask user if they would like to save
# before continuing.
if not self.__is_saved:
response = tkMessageBox.askyesno(
title = "Save Setup",
type = tkMessageBox.YESNOCANCEL,
message = "Most recent changes to setup have not been saved."
+ "Would you like to save before running PiPark?"
)
if response: self.saveData()
# data is saved, ask the user if they are sure they wish to quit.
else:
response = tkMessageBox.askyesno(
title = "Save Setup",
message = "Are you ready to leave setup and run PiPark?"
)
# user wishes to quit setup and run pipark, so do it!
if response:
# ensure data is valid before continuing
if not self.checkData():
# data invalid, so display message and return
tkMessageBox.showinfo(
title = "PiPark Setup",
message = "Saved data is invalid. Please ensure that "
+ "there are 3 control points and at least 1 parking "
+ "space marked."
)
return
self.quit_button.invoke()
if self.__is_verbose: print "INFO: Setup application terminated. "
main.main()
def clickRegister(self):
"""Register the car park with the server. """
if self.__is_verbose: print "ACTION: Clicked 'Register'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
self.register()
def clickNewImage(self):
"""Use PiCam to take new 'setup image' for PiPark setup. """
if self.__is_verbose: print "ACTION: Clicked 'Capture New Image'"
self.__is_saved = False
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
# clear the Tkinter display canvas, and all related setupdata. Then
# turn on PiCam to allow for new image to be taken.
self.__parking_spaces.clearAll(self.display)
self.__control_points.clearAll(self.display)
self.turnOnCamera()
def clickSave(self):
if self.__is_verbose: print "ACTION: Clicked Save'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
self.saveData()
def clickLoad(self):
if self.__is_verbose: print "ACTION: Clicked 'Load'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
if not self.loadImage(self.SETUP_IMAGE, self.display,
s.PICTURE_RESOLUTION[0]/2, s.PICTURE_RESOLUTION[1]/2):
tkMessageBox.showerror(title = "Error!",
message = "Error loading setup image."
+ " Please ensure setup image exists as ./image/setup_image.jpeg.")
return
# clear all previous data, and activate buttons
self.clear_button.invoke()
self.cps_button.config(state = tk.ACTIVE)
self.spaces_button.config(state = tk.ACTIVE)
def clickClear(self):
if self.__is_verbose: print "ACTION: Clicked 'Clear'"
self.__is_saved = False
# clear all data points, to start afresh
self.__parking_spaces.clearAll(self.display)
self.__control_points.clearAll(self.display)
def clickSpaces(self):
"""Add/remove parking-space bounding boxes. """
if self.__is_verbose: print "ACTION: Clicked 'Add/Remove Spaces'"
# toggle the button, and turn off other toggle buttons
self.spaces_button.toggle()
if self.cps_button.getIsActive(): self.cps_button.setOff()
def clickCPs(self):
"""Add/remove control points. """
if self.__is_verbose: print "ACTION: Clicked 'Add/Remove CPs'"
# toggle the button, and turn off other toggle buttons
self.cps_button.toggle()
if self.spaces_button.getIsActive(): self.spaces_button.setOff()
def clickQuit(self):
"""Quit & terminate the application. """
if self.__is_verbose: print "ACTION: Clicked 'Quit'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
response = True
# if the user hasn't recently saved, ask if they really wish to quit
if not self.__is_saved:
response = tkMessageBox.askyesno(
title = "Quit?",
message = "Are you sure you wish to quit?"
+ "All unsaved setup will be lost."
)
if response:
# user wishes to quit, destroy the application
self.quit()
self.master.destroy()
def clickAbout(self):
"""Open the README file for instructions on GUI use. """
if self.__is_verbose: print "ACTION: Clicked 'Open README'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
# load external README from command line
# TODO: Put this in new Tkinter window with scroll bar
os.system("leafpad " + "./SETUP_README.txt")
if self.__is_verbose: print "INFO: Opened ./SETUP_README.txt in leafpad."
# ==============================================================================
#
# Application Layout Management
#
# ==============================================================================
# --------------------------------------------------------------------------
# Create Image Display Canvas
# --------------------------------------------------------------------------
def __createDisplay(self):
"""
Create the display tkinter canvas to hold the images taken by the
pi camera.
"""
self.display = tk.Canvas(
self,
width = s.PICTURE_RESOLUTION[0],
height = s.PICTURE_RESOLUTION[1]
)
self.display.grid(row = 2, column = 0, rowspan = 1, columnspan = 6)
# --------------------------------------------------------------------------
# Create Options Menu
# --------------------------------------------------------------------------
def __createMenu(self):
"""Create a tkinter canvas in which to hold the menu buttons. """
# Layout:
# -------
# ------------------------------------------------------------------
# | Start || Capture New Image || Add/Remove Spaces || Quit |
# ------------------------------------------------------------------
# | Register || Save || Load || Clear || Add/Remove CPs || ReadMe |
# ------------------------------------------------------------------
# padding around buttons
PADDING = 10;
# start the main program
self.start_button = tk.Button(self, text = "Start PiPark",
command = self.clickStart, padx = PADDING)
self.start_button.grid(row = 0, column = 0,
sticky = tk.W + tk.E + tk.N + tk.S)
# register the car park button
self.register_button = tk.Button(self, text = "Register",
command = self.clickRegister, padx = PADDING)
self.register_button.grid(row = 1, column = 0,
sticky = tk.W + tk.E + tk.N + tk.S)
# take new setup image button
self.image_button = tk.Button(self, text = "Capture New Setup Image",
command = self.clickNewImage, padx = PADDING)
self.image_button.grid(row = 0, column = 1, rowspan = 1, columnspan = 3,
sticky = tk.W + tk.E + tk.N + tk.S)
# save setup data & image
self.save_button = tk.Button(self, text = "Save",
command = self.clickSave, padx = PADDING)
self.save_button.grid(row = 1, column = 1,
sticky = tk.W + tk.E + tk.N + tk.S)
# load setup data & image
self.load_button = tk.Button(self, text = "Load",
command = self.clickLoad, padx = PADDING)
self.load_button.grid(row = 1, column = 2,
sticky = tk.W + tk.E + tk.N + tk.S)
# clear all parking spaces and CPs
self.clear_button = tk.Button(self, text = "Clear",
command = self.clickClear, padx = PADDING)
self.clear_button.grid(row = 1, column = 3,
sticky = tk.W + tk.E + tk.N + tk.S)
# add/remove spaces button
self.spaces_button = ToggleButton(self)
self.spaces_button.config(text = "Add/Remove Spaces",
command = self.clickSpaces, padx = PADDING, state = tk.DISABLED)
self.spaces_button.grid(row = 0, column = 4,
sticky = tk.W + tk.E + tk.N + tk.S)
# add/remove control points button
self.cps_button = ToggleButton(self)
self.cps_button.config(text = "Add/Remove Control Points",
command = self.clickCPs, padx = PADDING, state = tk.DISABLED)
self.cps_button.grid(row = 1, column = 4,
sticky = tk.W + tk.E + tk.N + tk.S)
# quit setup
self.quit_button = tk.Button(self, text = "Quit",
command = self.clickQuit, padx = PADDING)
self.quit_button.grid(row = 0, column = 5,
sticky = tk.W + tk.E + tk.N + tk.S)
# about button - display information about PiPark
self.about_button = tk.Button(self, text = "Open ReadMe",
command = self.clickAbout, padx = PADDING)
self.about_button.grid(row = 1, column = 5,
sticky = tk.W + tk.E + tk.N + tk.S)
# ==============================================================================
#
# Getters and Setters
#
# ==============================================================================
# --------------------------------------------------------------------------
# Is Verbose?
# --------------------------------------------------------------------------
def getIsVerbose():
return self.__is_verbose
def setIsVerbose(value):
if isinstance(value, bool): self.__is_verbose = value
class Application(tk.Frame):
# --------------------------------------------------------------------------
# Instance Attributes
# --------------------------------------------------------------------------
# booleans
__is_verbose = s.IS_VERBOSE # print messages to terminal
__is_saved = False
# lists to hold parking space and control point references
__parking_spaces = None
__control_points = None
# picamera
__camera = None
__camera_is_active = False
# image load/save locoations
SETUP_IMAGE = "./images/setup.jpeg"
DEFAULT_IMAGE = "./images/default.jpeg"
# --------------------------------------------------------------------------
# Constructor Method
# --------------------------------------------------------------------------
def __init__(self, master=None):
"""Application constructor method. """
# run super constructor method
tk.Frame.__init__(self, master)
# set alignment inside the frame
self.grid()
# create widgets
self.__createDisplay(
) # display canvas: holds the image, CPs and spaces
self.__createMenu(
) # menu canvas: holds the buttons and menu bar image
# lists to hold parking space and control point references
self.__parking_spaces = Boxes(self.display, type=0)
self.__control_points = Boxes(self.display, type=1)
# create mouse button and key-press handlers -> set focus to this frame
self.bind("<Return>", self.returnPressHandler)
self.bind("<Key>", self.keyPressHandler)
self.bind("<Escape>", self.escapePressHandler)
self.display.bind("<Button-1>", self.leftClickHandler)
self.display.bind("<Button-3>", self.rightClickHandler)
self.focus_set()
if self.__is_verbose:
print "INFO: __parking_spaces length:", self.__parking_spaces.length(
)
print "INFO: __control_points length:", self.__control_points.length(
)
# load the default background
self.loadImage(self.DEFAULT_IMAGE, self.display,
s.PICTURE_RESOLUTION[0] / 2,
s.PICTURE_RESOLUTION[1] / 2)
# ==============================================================================
#
# Public Application Methods
#
# ==============================================================================
# --------------------------------------------------------------------------
# Load Image
# --------------------------------------------------------------------------
def loadImage(self, image_address, canvas, width, height):
"""
Load image at image_address. If the load is successful then return True,
otherwise return False.
Keyword Arguments:
image_address -- The address of the image to be loaded (default = './').
canvas -- The Tkinter Canvas into which the image is loaded.
width -- Width of the image to load.
height -- Height of the image to load.
Returns:
Boolean -- True if load successful, False if not.
"""
# clear the old canvas
canvas.delete(tk.ALL)
try:
# guard against incorrect argument datatypes
if not isinstance(canvas, tk.Canvas): raise TypeError
if not isinstance(image_address, str): raise TypeError
if not isinstance(width, int): raise TypeError
if not isinstance(height, int): raise TypeError
# load the image into the canvas
photo = ImageTk.PhotoImage(Image.open(image_address))
canvas.create_image((width, height), image=photo)
canvas.image = photo
# image load successful
return True
except TypeError:
# arguments of incorrect data type, load unsuccessful
if self.__is_verbose:
print "ERROR: loadImage() arguments of incorrect data type."
return False
except:
# image failed to load
if self.__is_verbose:
print "ERROR: loadImage() failed to load image " + image_address
return False
# --------------------------------------------------------------------------
# Activate the Pi Camera
# --------------------------------------------------------------------------
def turnOnCamera(self):
"""
Instruct the user how to take a new setup image, then activate
the PiCam. If the camera fails to load, catch the exception and present
error message.
"""
# show quick dialogue box with basic instruction
tkMessageBox.showinfo(
title="",
message="Press the ENTER key to take a new setup image " +
"or the ESCAPE key to cancel.")
try:
# initialise the camera using the settings in the imageread module
self.__camera = imageread.setup_camera(is_fullscreen=True)
#preview window
while True:
ret, frame = self.__camera.read()
rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2BGRA)
cv2.imshow('frame', rgb)
if cv2.waitKey(1) & 0xFF == ord('\x0D'):
cv2.destroyWindow('frame')
break
#self.__camera.awb_mode = 'auto';
#self.__camera.exposure_mode = 'auto';
#self.__camera.start_preview()
#self.__camera_is_active = True
#if self.__is_verbose: print "INFO: PiCam activated."
except:
# camera failed to load, display error message
tkMessageBox.showerror(
title="Error!",
message="Error: Failed to setup and start PiCam.")
# --------------------------------------------------------------------------
# Save Data
# --------------------------------------------------------------------------
def saveData(self):
"""Save the CP and parking space reference data to ./setup_data.py. """
# Open the file to output the co-ordinates to
f1 = open('./setup_data.py', 'w+')
# Print the dictionary data to the file
print >> f1, 'boxes = ['
# for every parking space, save the data to ./setup_data.py
for i in range(self.__parking_spaces.length()):
space = self.__parking_spaces.get(i).getOutput()
# ignore the space if no data present
if space != None:
o = (i)
print >> f1, space, ','
# for every control point, save the data to ./setup_data.py
for j in range(self.__control_points.length()):
cp = self.__control_points.get(j).getOutput()
# ignore the CP if no data present
if cp != None:
o = (i)
print >> f1, cp, ','
# save to ./setup_data.py
print >> f1, ']'
self.__is_saved = True
if self.__is_verbose: print 'INFO: Data saved in file setup_data.py.'
tkMessageBox.showinfo(title="PiPark Setup",
message="Data saved successfully.")
# --------------------------------------------------------------------------
# Load Data
# --------------------------------------------------------------------------
def loadData(self):
try:
# load the setup data, reload to refresh the data
import setup_data
reload(setup_data)
except:
if self.__is_verbose:
print "ERROR: Problem loading data from ./setup_data.py"
tkMessageBox.showerror(
title="Error!",
message="Problem loading data from setup_data.py")
self.__is_saved = True
return setup_data.boxes
# --------------------------------------------------------------------------
# Check Data
# --------------------------------------------------------------------------
def checkData(self):
"""
Check that the setup data meets the following criteria:
1) There is at least 1 parking space.
2) There are exactly 3 control points.
Returns:
Boolean -- True if criteria is met, False if not.
"""
if self.__is_verbose: print "INFO: Data is being checked for validity."
# get the boxes data to check from setup_data
try:
# load the setup data
import setup_data
reload(setup_data)
# ensure that boxes exists and is not empty
box_data = setup_data.boxes
if not box_data: raise ValueError
except ImportError:
if self.__is_verbose:
print "ERROR: Problem loading data from ./setup_data.py"
except ValueError:
if self.__is_verbose:
print "ERROR: ./setup_data.py 'boxes' is empty."
except:
if self.__is_verbose:
print "ERROR: ./setup_data.py does not contain 'boxes'."
# create lists to hold data of each type
space_boxes = []
control_boxes = []
# append the box data to space or control list as appropriate
for data_set in box_data:
if data_set[1] == 0:
space_boxes.append(data_set)
elif data_set[1] == 1:
control_boxes.append(data_set)
elif self.__is_verbose:
print "ERROR: Box-type not set to either 0 or 1."
# data is valid if there is at least 1 space and exactly 3 control points
if len(space_boxes) > 0 and len(control_boxes) == 3:
valid_data = True
else:
valid_data = False
if self.__is_verbose: print "INFO: Data checked. Data is", valid_data
return valid_data
# --------------------------------------------------------------------------
# Register Data
# --------------------------------------------------------------------------
def register(self):
"""Register the Pi with the server. """
# if setup hasn't been saved recently since last change, ask the if
# user to save first
if not self.__is_saved:
response = tkMessageBox.askokcancel(
title="Save Setup",
message="Setup data must be saved before the registration" +
" process can be completed. Would you like to save now?")
# if user selects 'yes' save the data and continue, else do not
# register the pi
if response:
self.saveData()
else:
tkMessageBox.showinfo(title="PiPark Setup",
message="Registration not completed.")
return
# check that most recent saved data is valid (#CPs == 3, #Spaces > 0)
if not self.checkData():
# data invalid, so display message and return
tkMessageBox.showinfo(
title="PiPark Setup",
message="Registration not complete.\n\nSaved data is " +
"invalid. Please ensure that there are 3 control points and " +
"at least 1 parking spaces marked.")
return
# attempt to import the setup data and ensure 'boxes' is a list
try:
import setup_data
reload(setup_data)
boxes = setup_data.boxes
if not isinstance(boxes, list): raise ValueError()
except:
print "ERROR: Setup data does not exist. Please run options 1 and 2 first."
return
# attempt to import the server senddata module
try:
import senddata
except:
print "ERROR: Could not import send data file."
return
# deregister all areas associated with this pi (start fresh)
out = senddata.deregister_pi()
try:
out['error']
print out #debug
print "ERROR: Error in connecting to server. Please update settings.py."
return
except:
pass
# register each box on the server
for box in boxes:
if box[1] == 0:
output = senddata.register_area(box[0])
if "error" in output.keys():
if self.__is_verbose: print "ERROR:", output["error"]
return
else:
if self.__is_verbose:
print "INFO: Registering area", box[0], "on server."
# print success message if verbose
if self.__is_verbose: print "\nINFO: Server registration successful."
# ==============================================================================
#
# Event Handlers
#
# ==============================================================================
# --------------------------------------------------------------------------
# Return-key-press Event Handler
# --------------------------------------------------------------------------
def returnPressHandler(self, event):
"""
Handle Return-key-press events. Capture a new setup image when PiCam
is active, and load the image.
"""
# ensure focus on window
self.focus_set()
# do nothing if camera is not active, or no camera object exists
#if not self.__camera_is_active or not self.__camera: return
try:
# capture new setup image, then close the camera
#self.__camera.capture(self.SETUP_IMAGE)
ret, frame = self.__camera.read()
cv2.imwrite(self.SETUP_IMAGE, frame)
self.__camera.release()
#self.__camera.stop_preview()
#self.__camera.close()
#self.__camera_is_active = False
if self.__is_verbose:
print "INFO: New setup image captured."
print "INFO: PiCam deactivated."
except:
# image failed to capture, show error message
tkMessageBox.showerror(
title="Error!",
message="Error: Failed to capture new setup image.")
# load the new setup image
self.loadImage(self.SETUP_IMAGE, self.display,
s.PICTURE_RESOLUTION[0] / 2,
s.PICTURE_RESOLUTION[1] / 2)
# activate buttons if they're disabled
self.cps_button.config(state=tk.ACTIVE)
self.spaces_button.config(state=tk.ACTIVE)
# --------------------------------------------------------------------------
# Escape-key-press Event Handler
# --------------------------------------------------------------------------
def escapePressHandler(self, event):
# ensure focus on window
self.focus_set()
# do nothing if camera is not active, or no camera object exists
if not self.__camera_is_active or not self.__camera: return
try:
# close the camera without taking new image
# TODO close the camera without taking new image using opencv
cv2.destroyWindow('frame')
self.__camera.release()
if self.__is_verbose:
print "INFO: PiCam deactivated."
except:
# image failed to close for some reason, show error message
if self.__is_verbose:
print "ERROR: PiCam failed to close correctly."
# --------------------------------------------------------------------------
# Key-press Event Handler
# --------------------------------------------------------------------------
def keyPressHandler(self, event):
"""Handle key-press events for numeric keys. """
key = event.char
NUM_KEYS = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '0']
if key in NUM_KEYS:
if self.__is_verbose: print "INFO: Number-key pressed", key
if self.spaces_button.getIsActive():
self.__parking_spaces.setCurrentBox(int(key))
if self.cps_button.getIsActive():
# ignore all other numbers, but 1, 2 and 3 as 3 is the maximum
# number of control points allowed.
if key not in ['1', '2', '3']: return
# NB: -1 from key press, because list indices are [0, 1, 2],
# but for ease of user selection the numbers 1, 2, 3 are used
# for input
self.__control_points.setCurrentBox(int(key) - 1)
# --------------------------------------------------------------------------
# LMB Event Handler
# --------------------------------------------------------------------------
def leftClickHandler(self, event):
"""Handle LMB-click events to add/remove control points & spaces. """
# ensure focus on display canvas to recieve mouse clicks
self.display.focus_set()
# perform correct operation, dependent on which toggle button is active
# add new control points (max = 3)
if self.cps_button.getIsActive():
if self.__is_verbose: print "INFO: Add Control Point"
self.__is_saved = False
this_cp_id = self.__control_points.getCurrentBox()
this_cp = self.__control_points.boxes[this_cp_id]
this_cp.updatePoints(event.x, event.y)
# add new parking space
elif self.spaces_button.getIsActive():
if self.__is_verbose: print "INFO: Add Parking Space"
self.__is_saved = False
this_space_id = self.__parking_spaces.getCurrentBox()
this_space = self.__parking_spaces.boxes[this_space_id]
this_space.updatePoints(event.x, event.y)
# do nothing -- ignore LMB clicks
else:
if self.__is_verbose: print "INFO: Just clicking LMB merrily =D"
# return focus to the main frame for key-press events
self.focus_set()
# --------------------------------------------------------------------------
# RMB Event Handler
# --------------------------------------------------------------------------
def rightClickHandler(self, event):
"""Handle RMB-click events to add/remove control points & spaces. """
# ensure focus is set to the display canvas
self.display.focus_set()
# perform correct operation, dependent on which toggle button is active
if self.cps_button.getIsActive():
if self.__is_verbose: print "INFO: Remove Control Point"
self.__is_saved = False
self.__control_points.boxes[
self.__control_points.getCurrentBox()].clear()
self.__control_points.boxes[
self.__control_points.getCurrentBox()].deleteRectangle(
self.display)
elif self.spaces_button.getIsActive():
if self.__is_verbose: print "INFO: Remove parking space"
self.__is_saved = False
self.__parking_spaces.boxes[
self.__parking_spaces.getCurrentBox()].clear()
self.__parking_spaces.boxes[
self.__parking_spaces.getCurrentBox()].deleteRectangle(
self.display)
else:
if self.__is_verbose: print "INFO: Just clicking RMB merrily =)"
# return focus to the main frame for key-press events
self.focus_set()
# ==============================================================================
#
# Button Handlers
#
# ==============================================================================
def clickStart(self):
"""
Close the current setup application, then initiate the main
PiPark program.
"""
if self.__is_verbose: print "ACTION: Clicked 'Start'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
# set initial responses
response = False
response1 = False
response2 = False
# if setup data has not been saved. Ask user if they would like to save
# before continuing.
if not self.__is_saved:
response = tkMessageBox.askyesno(
title="Save Setup",
type=tkMessageBox.YESNOCANCEL,
message="Most recent changes to setup have not been saved." +
"Would you like to save before running PiPark?")
if response: self.saveData()
# data is saved, ask the user if they are sure they wish to quit.
else:
response = tkMessageBox.askyesno(
title="Save Setup",
message="Are you ready to leave setup and run PiPark?")
# user wishes to quit setup and run pipark, so do it!
if response:
# ensure data is valid before continuing
if not self.checkData():
# data invalid, so display message and return
tkMessageBox.showinfo(
title="PiPark Setup",
message="Saved data is invalid. Please ensure that " +
"there are 3 control points and at least 1 parking " +
"space marked.")
return
self.quit_button.invoke()
if self.__is_verbose: print "INFO: Setup application terminated. "
main.main()
def clickRegister(self):
"""Register the car park with the server. """
if self.__is_verbose: print "ACTION: Clicked 'Register'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
self.register()
def clickNewImage(self):
"""Use PiCam to take new 'setup image' for PiPark setup. """
if self.__is_verbose: print "ACTION: Clicked 'Capture New Image'"
self.__is_saved = False
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
# clear the Tkinter display canvas, and all related setupdata. Then
# turn on PiCam to allow for new image to be taken.
self.__parking_spaces.clearAll(self.display)
self.__control_points.clearAll(self.display)
self.turnOnCamera()
def clickSave(self):
if self.__is_verbose: print "ACTION: Clicked Save'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
self.saveData()
def clickLoad(self):
if self.__is_verbose: print "ACTION: Clicked 'Load'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
if not self.loadImage(self.SETUP_IMAGE, self.display,
s.PICTURE_RESOLUTION[0] / 2,
s.PICTURE_RESOLUTION[1] / 2):
tkMessageBox.showerror(
title="Error!",
message="Error loading setup image." +
" Please ensure setup image exists as ./image/setup_image.jpeg."
)
return
# clear all previous data, and activate buttons
self.clear_button.invoke()
self.cps_button.config(state=tk.ACTIVE)
self.spaces_button.config(state=tk.ACTIVE)
def clickClear(self):
if self.__is_verbose: print "ACTION: Clicked 'Clear'"
self.__is_saved = False
# clear all data points, to start afresh
self.__parking_spaces.clearAll(self.display)
self.__control_points.clearAll(self.display)
def clickSpaces(self):
"""Add/remove parking-space bounding boxes. """
if self.__is_verbose: print "ACTION: Clicked 'Add/Remove Spaces'"
# toggle the button, and turn off other toggle buttons
self.spaces_button.toggle()
if self.cps_button.getIsActive(): self.cps_button.setOff()
def clickCPs(self):
"""Add/remove control points. """
if self.__is_verbose: print "ACTION: Clicked 'Add/Remove CPs'"
# toggle the button, and turn off other toggle buttons
self.cps_button.toggle()
if self.spaces_button.getIsActive(): self.spaces_button.setOff()
def clickQuit(self):
"""Quit & terminate the application. """
if self.__is_verbose: print "ACTION: Clicked 'Quit'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
response = True
# if the user hasn't recently saved, ask if they really wish to quit
if not self.__is_saved:
response = tkMessageBox.askyesno(
title="Quit?",
message="Are you sure you wish to quit?" +
"All unsaved setup will be lost.")
if response:
# user wishes to quit, destroy the application
self.quit()
self.master.destroy()
def clickAbout(self):
"""Open the README file for instructions on GUI use. """
if self.__is_verbose: print "ACTION: Clicked 'Open README'"
# turn off toggle buttons
self.spaces_button.setOff()
self.cps_button.setOff()
# load external README from command line
# TODO: Put this in new Tkinter window with scroll bar
os.system("leafpad " + "./SETUP_README.txt")
if self.__is_verbose:
print "INFO: Opened ./SETUP_README.txt in leafpad."
# ==============================================================================
#
# Application Layout Management
#
# ==============================================================================
# --------------------------------------------------------------------------
# Create Image Display Canvas
# --------------------------------------------------------------------------
def __createDisplay(self):
"""
Create the display tkinter canvas to hold the images taken by the
pi camera.
"""
self.display = tk.Canvas(self,
width=s.PICTURE_RESOLUTION[0],
height=s.PICTURE_RESOLUTION[1])
self.display.grid(row=2, column=0, rowspan=1, columnspan=6)
# --------------------------------------------------------------------------
# Create Options Menu
# --------------------------------------------------------------------------
def __createMenu(self):
"""Create a tkinter canvas in which to hold the menu buttons. """
# Layout:
# -------
# ------------------------------------------------------------------
# | Start || Capture New Image || Add/Remove Spaces || Quit |
# ------------------------------------------------------------------
# | Register || Save || Load || Clear || Add/Remove CPs || ReadMe |
# ------------------------------------------------------------------
# padding around buttons
PADDING = 10
# start the main program
self.start_button = tk.Button(self,
text="Start PiPark",
command=self.clickStart,
padx=PADDING)
self.start_button.grid(row=0,
column=0,
sticky=tk.W + tk.E + tk.N + tk.S)
# register the car park button
self.register_button = tk.Button(self,
text="Register",
command=self.clickRegister,
padx=PADDING)
self.register_button.grid(row=1,
column=0,
sticky=tk.W + tk.E + tk.N + tk.S)
# take new setup image button
self.image_button = tk.Button(self,
text="Capture New Setup Image",
command=self.clickNewImage,
padx=PADDING)
self.image_button.grid(row=0,
column=1,
rowspan=1,
columnspan=3,
sticky=tk.W + tk.E + tk.N + tk.S)
# save setup data & image
self.save_button = tk.Button(self,
text="Save",
command=self.clickSave,
padx=PADDING)
self.save_button.grid(row=1,
column=1,
sticky=tk.W + tk.E + tk.N + tk.S)
# load setup data & image
self.load_button = tk.Button(self,
text="Load",
command=self.clickLoad,
padx=PADDING)
self.load_button.grid(row=1,
column=2,
sticky=tk.W + tk.E + tk.N + tk.S)
# clear all parking spaces and CPs
self.clear_button = tk.Button(self,
text="Clear",
command=self.clickClear,
padx=PADDING)
self.clear_button.grid(row=1,
column=3,
sticky=tk.W + tk.E + tk.N + tk.S)
# add/remove spaces button
self.spaces_button = ToggleButton(self)
self.spaces_button.config(text="Add/Remove Spaces",
command=self.clickSpaces,
padx=PADDING,
state=tk.DISABLED)
self.spaces_button.grid(row=0,
column=4,
sticky=tk.W + tk.E + tk.N + tk.S)
# add/remove control points button
self.cps_button = ToggleButton(self)
self.cps_button.config(text="Add/Remove Control Points",
command=self.clickCPs,
padx=PADDING,
state=tk.DISABLED)
self.cps_button.grid(row=1, column=4, sticky=tk.W + tk.E + tk.N + tk.S)
# quit setup
self.quit_button = tk.Button(self,
text="Quit",
command=self.clickQuit,
padx=PADDING)
self.quit_button.grid(row=0,
column=5,
sticky=tk.W + tk.E + tk.N + tk.S)
# about button - display information about PiPark
self.about_button = tk.Button(self,
text="Open ReadMe",
command=self.clickAbout,
padx=PADDING)
self.about_button.grid(row=1,
column=5,
sticky=tk.W + tk.E + tk.N + tk.S)
# ==============================================================================
#
# Getters and Setters
#
# ==============================================================================
# --------------------------------------------------------------------------
# Is Verbose?
# --------------------------------------------------------------------------
def getIsVerbose():
return self.__is_verbose
def setIsVerbose(value):
if isinstance(value, bool): self.__is_verbose = value