04. Python-Programming(Introduction)(Object-oriented Paint, Multi Thread)

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파이썬(입문) 과제4

객체 지향(Object oriented) 그림판

• 객체 지향 프로그래밍이란?
  • 프로그래밍에서 필요한 데이터를 추상화시켜 상태와 행위를 가진 객체를 만들고 그 객체들 간의 유기적인 상호작용을 통해 로직을 구성하는 프로그래밍 방법

# 코드 from tkinter import * import math import random class Shape: color, width = '', 0 shX1, shY1, shX2, shY2 = [0] * 4 def drawShape(self): raise NotImplementedError() class Rectangle(Shape): objects = None def __init__(self, x1, y1, x2, y2, c, w): self.shX1 = x1 self.shY1 = y1 self.shX2 = x2 self.shY2 = y2 self.color = c self.width = w self.drawShape() def __del__(self) : for obj in self.objects : canvas.delete(obj) def drawShape(self) : sx1 = self.shX1; sy1 = self.shY1; sx2 = self.shX2; sy2 =self.shY2 squreList = [] squreList.append(canvas.create_line(sx1, sy1, sx1, sy2, fill = self.color, width = self.width)) squreList.append(canvas.create_line(sx1, sy2, sx2, sy2, fill = self.color, width = self.width)) squreList.append(canvas.create_line(sx2, sy2, sx2, sy1, fill = self.color, width = self.width)) squreList.append(canvas.create_line(sx2, sy1, sx1, sy1, fill = self.color, width = self.width)) self.objects=squreList class Circle(Shape) : objects = None def __init__(self, x1, y1, x2, y2, c, w): self.shX1 = x1 self.shY1 = y1 self.shX2 = x2 self.shY2 = y2 self.color = c self.width = w self.drawShape() def __del__(self) : canvas.delete(self.objects) def drawShape(self) : sx1= self.shX1; sy1= self.shY1; sx2 = self.shX2; sy2 = self.shY2 self.objects = canvas.create_oval(sx1, sy1, sx2, sy2, outline = self.color, width = self.width) def getColor() : r = random.randrange(16, 256) g = random.randrange(16, 256) b = random.randrange(16, 256) return "#" + hex(r)[2:] + hex(g)[2:] + hex(b)[2:] def getWidth() : return random.randrange(1, 9) def startDrawRect(event): global x1, y1, x2, y2, rectshape,cirshape x1 = event.x y1 = event.y def endDrawRect(event): global x1, y1, x2, y2, rectshape,cirshape x2 = event.x y2 = event.y rect = Rectangle(x1, y1, x2, y2, getColor(), getWidth()) rectshape.append(rect) def startDrawCircle(event): global x1, y1, x2, y2, rectshape,cirshape x1=event.x y1=event.y def endDrawCircle(event): global x1, y1, x2, y2, rectshape,cirshape x2=event.x y2=event.y cir = Circle(x1, y1, x2, y2, getColor(), getWidth()) cirshape.append(cir) def deleteRectShape(event): global rectshape if len(rectshape) != 0 : dRS = rectshape.pop() del(dRS) def deleteCirShape(event): global cirshape if len(cirshape) != 0 : dCS = cirshape.pop() del(dCS) rectshape,cirshape = [],[] window = None canvas = None x1, y1, x2, y2 = None, None, None, None if __name__ == "__main__" : window=Tk() window.title("객체지향 그림판") canvas = Canvas(window, height = 300, width = 300) canvas.bind("<Button-1>", startDrawRect) canvas.bind("<ButtonRelease-1>", endDrawRect) canvas.bind("<Button-3>", startDrawCircle) canvas.bind("<ButtonRelease-3>", endDrawCircle) canvas.bind("<Double-Button-1>",deleteCirShape) canvas.bind("<Double-Button-2>",deleteRectShape) canvas.pack() window.mainloop()

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멀티 스레드(Multi Thread) 실습

• 스레드란?
  • 프로세스 내에서 일을 처리하는 세부실행 단위를 말함
• 멀티 스레드란?
  • 하나의 프로세스를 다수의 실행 단위로 구분하여 자원을 공유하고, 자원의 생성과 관리의 중복성을 최소화하여 수행 능력을 향상시키는 것을 Multi Thread라고 한다.
  • 하나의 프로그램에 동시에 여러개의 일을 수행할수 있도록 해주는 것

# 코드 from tkinter import * from tkinter.ttk import * # progressbar를 위해 필요함 import random import time import threading class ThreadProgressBar(): thread = None progress = None def __init__(self, parent): self.progress = Progressbar(parent, orient=HORIZONTAL, length=500) self.progress.pack(side=TOP, fill=X, ipadx=10, ipady=10, padx=10, pady=10) self.thread = threading.Thread(target=self.runProgress, args=(self.progress,)) self.thread.start() def runProgress(self, progress): hop = 0 while True: hop = random.randrange(0,10) if progress['value'] >= 100: break progress['value'] += hop time.sleep(0.5) def runThreadProgress(): thBar1 = ThreadProgressBar(w) thBar2 = ThreadProgressBar(w) thBar3 = ThreadProgressBar(w) if __name__ == "__main__": w = Tk() w.geometry("300x250") w.title("멀티 스레드") threadButton = Button(w, text='멀티스레드 시작', command=runThreadProgress) threadButton.pack(side=TOP, fill=X, ipadx=10, ipady=10, padx=10, pady=10) w.mainloop()

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