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polygon.py
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polygon.py
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from tkinter import CURRENT
import tkinter as tk
from tkinter import ttk
import sys,os,string,time
from config import *
class Polygon():
'''
root: Tk() object parent of canvas
canvas: Canvas tkinter object on root
pts: points of corners on the canvas
radius: radius of each point default = 4
'''
def __init__(self,root,canvas,pts,radius=4):
self.canvas = canvas
self.root = root
self.points = []
self.enter_status = [0]*len(pts)
self.drag_status = [0]*len(pts)
self.pt_coords = pts
self.point_in_use = None
self.poly_type = None
self.type_text = None
self.type_bg = None
self.now_showing_type = False
self.radius = SMALL_RADIUS
self.inside_poly = False
self.down_inside_poly = False
self.select_poly = False
#self.colors = ["yellow","red","gray","green"]
self.colors = ["#FF0000","#FFFF00","#00FF00","#0000FF","#800000","#00FFFF","#FFFFFF","#800080"]
# Add points to list of points
self.initialize_points()
#flatten = lambda l: [item for sublist in l for item in sublist]
# Create a polygon tkinter widget
self.polygon = self.canvas.create_polygon(
self.flatten(),
outline = 'red',
fill = '',
tag = 'Quad')
self.draw_points()
for pt in self.points:
# Binds point on which LMB(Left Mouse Button is pressed)
self.canvas.tag_bind(pt,"<ButtonPress-1>",self.down)
# Binds point on which LMB is unpressed
self.canvas.tag_bind(pt,"<ButtonRelease-1>",self.chkup)
# Binds self.enter to point on which the cursor enters
self.canvas.tag_bind(pt,"<Enter>",self.enter)
# Binds self.leave to point on which the cursor exits
self.canvas.tag_bind(pt,"<Leave>",self.leave)
self.canvas.tag_bind(self.polygon,"<Enter>",self.enter_poly)
self.canvas.tag_bind(self.polygon,"<Leave>",self.leave_poly)
self.canvas.tag_bind(self.polygon,"<ButtonPress-1>",self.down_poly)
self.canvas.tag_bind(self.polygon,"<ButtonRelease-1>",self.chkup_poly)
def enter_poly(self,event):
self.inside_poly = True
if self.select_poly == False:
self.canvas.itemconfigure(CURRENT,stipple='gray25',fill='blue')
def delete_self(self):
print ("Deleting Polygon:",self.polygon)
for pt in self.points:
self.canvas.delete(pt)
self.canvas.delete(self.polygon)
if self.type_text != None:
self.canvas.delete(self.type_text)
self.type_text = None
if self.type_bg != None:
self.canvas.delete(self.type_bg)
self.type_text = None
def leave_poly(self,event):
self.inside_poly = False
self.down_inside_poly = False
if self.select_poly == False:
self.canvas.itemconfigure(CURRENT,stipple='', fill = '')
def down_poly(self,event):
self.down_inside_poly = True
def chkup_poly(self,event):
if self.down_inside_poly == True:
if self.select_poly == False:
self.canvas.itemconfigure(CURRENT,fill = 'red',stipple='gray50')
self.select_poly = True
#self.show_type()
self.points_bigger()
elif self.select_poly == True:
self.canvas.itemconfigure(CURRENT,fill = '',stipple='')
self.select_poly = False
#self.unshow_type()
self.points_smaller()
self.canvas.tag_raise(self.polygon)
self.draw_points()
self.down_inside_poly = False
def flatten(self):
l = self.pt_coords
return [item for sublist in l for item in sublist]
# draw circular point widgets on the canvas
def initialize_points(self):
for i in range(len(self.pt_coords)):
if i < len(self.colors):
fill_color = self.colors[i]
else:
fill_color = "green"
self.points.append(
self.canvas.create_oval(
self.pt_coords[i][0]-self.radius,self.pt_coords[i][1]-self.radius,
self.pt_coords[i][0]+self.radius,self.pt_coords[i][1]+self.radius,
activefill = fill_color,
fill = fill_color,
disabledfill = "blue",
tag = "Point"
)
)
def show_type(self):
if not self.now_showing_type:
self.now_showing_type = True
else:
return
sums = [0,0]
for row in self.pt_coords:
for i , num in enumerate(row):
sums[i] += num
center = [int(x/len(self.pt_coords)) for x in sums]
if self.poly_type == None:
text = "None"
else:
text = self.poly_type
self.type_text = self.canvas.create_text(*center,anchor=tk.CENTER,font=("Times", FONT_SIZE,'bold'),text=text)
self.type_bg = self.canvas.create_rectangle(self.canvas.bbox(self.type_text),fill="white")
self.canvas.tag_lower(self.type_bg,self.type_text)
def unshow_type(self):
if self.now_showing_type:
self.now_showing_type = False
else:
return
self.canvas.delete(self.type_text)
self.canvas.delete(self.type_bg)
self.type_text = None
self.type_bg = None
# Triggered when cursor enters the bound widget(A point in our case)
def enter(self,event):
#self.canvas.itemconfigure(CURRENT,fill="blue")
self.loc = 1
def leave(self,event):
#self.canvas.itemconfigure(CURRENT,fill="green")
pass
# Updates location of each point according to the coordinates in self.coords
def draw_points(self):
for i in range(len(self.points)):
self.update_point(self.points[i],self.pt_coords[i][0],self.pt_coords[i][1])
for pt in self.points:
self.canvas.tag_raise(pt)
# Updates a single point in self.coords
def update_point(self,point_id,x,y):
self.canvas.coords(
point_id,
x-self.radius,y-self.radius,
x+self.radius,y+self.radius
)
self.pt_coords[self.points.index(point_id)] = [x,y]
def get_pt_center(self, point_id):
p = self.canvas.coords(point_id)
return (int((p[0]+p[2])/2), int((p[1]+p[3])/2))
# Updates the polygon according to the changed point in self.coords
def update_polygon(self):
#flatten = lambda l=l: [item for sublist in l for item in sublist]
self.canvas.coords(
self.polygon,
*self.flatten()
)
# Triggered by binding action
def down(self,event):
self.point_in_use = event.widget
event.widget.bind("<B1-Motion>",self.motion)
#self.canvas.itemconfigure(CURRENT,fill = "black")
# Triggered when a point is press and moved
def motion(self,event):
#if self.select_poly:
# self.unshow_type()
self.root.config(cursor = "crosshair")
self.point_in_use = event.widget
#self.point_in_use.itemconfigure(CURRENT,fill = "black")
x,y = self.point_in_use.canvasx(event.x), self.point_in_use.canvasy(event.y)
pt = self.canvas.find_withtag("current")[0]
self.update_point(
pt,
self.point_in_use.canvasx(event.x),
self.point_in_use.canvasy(event.y)
)
self.update_polygon()
self.draw_points()
#got = canvas.coords(self.point,self.x-self.radius,self.y-self.radius,self.x+self.radius,self.y+self.radius)
# triggered when a point is unpressed
def chkup(self,event):
event.widget.unbind("<B1-Motion>")
self.root.config(cursor = "")
#self.canvas.itemconfigure(CURRENT,fill="green")
#if self.select_poly:
# self.show_type()
def deselect_poly(self):
if self.select_poly == False:
pass
else:
self.canvas.itemconfigure(self.polygon,fill = '',stipple='')
self.select_poly = False
#self.unshow_type()
self.down_inside_poly = False
self.points_smaller()
def select_polygon(self):
if self.select_poly == True:
pass
else:
self.canvas.itemconfigure(self.polygon,fill = 'red',stipple='gray50')
self.select_poly = True
self.points_bigger()
def points_smaller(self):
self.radius = SMALL_RADIUS
self.draw_points()
def points_bigger(self):
self.radius = BIG_RADIUS
self.draw_points()