python实现画图工具

简易画图工具(Python)，供大家参考，具体内容如下

小黑最近在努力的入门python，正好学习到了Python的tkinker模块下的Canvas(画布)和Button(按钮)再加上相应的事务管理，实现了一个简单的画图小工具。

程序代码

#画图软件的实现
from tkinter.filedialog import *
from tkinter import *
from tkinter.colorchooser import *

win_width=900
win_height=450


class Application(Frame):
  def __init__(self,master=None,bgcolor=\"#000000\"):

    super().__init__(master)
    self.master=master
    self.bgcolor=bgcolor
    self.x=0
    self.y=0
    self.fgcolor=\"#ff0000\"
    self.lastDraw=0 #表示最后绘制的图形的id
    self.startDrawFlag=False
    self.pack()
    self.createWidget()
def createWidget(self):
  # 创建画板
  self.drawCad=Canvas(self,width=win_width,height=win_height*0.9,bg=self.bgcolor)
  self.drawCad.pack()
  # 创建按钮
  btn_start = Button(self,text=\"开始\",name=\"start\")
  btn_start.pack(side=\"left\",padx=10)
  btn_pen = Button(self, text=\"画笔\", name=\"pen\")
  btn_pen.pack(side=\"left\", padx=10)
  btn_rect = Button(self, text=\"矩形\", name=\"rect\")
  btn_rect.pack(side=\"left\", padx=10)
  btn_clear = Button(self, text=\"清屏\", name=\"clear\")
  btn_clear.pack(side=\"left\", padx=10)
  btn_earsor = Button(self, text=\"橡皮擦\", name=\"earsor\")
  btn_earsor.pack(side=\"left\", padx=10)
  btn_line = Button(self, text=\"直线\", name=\"line\")
  btn_line.pack(side=\"left\", padx=10)
  btn_lineArrow = Button(self, text=\"箭头直线\", name=\"lineArrow\")
  btn_lineArrow.pack(side=\"left\", padx=10)
   btn_color = Button(self, text=\"颜色\", name=\"color\")
  btn_color.pack(side=\"left\", padx=10)
  #为按钮绑定事件
  btn_pen.bind_class(\"Button\",\"<1>\",self.eventManger)
  self.drawCad.bind(\"<ButtonRelease-1>\",self.stopDraw)
def eventManger(self,event):
  name=event.widget.winfo_name()
  print(name)
  if name==\"line\" :
    self.drawCad.bind(\"<B1-Motion>\",self.myline)
  elif name==\"lineArrow\":
    self.drawCad.bind(\"<B1-Motion>\", self.mylineArrow)
  elif name==\"rect\":
    self.drawCad.bind(\"<B1-Motion>\", self.myRect)
  elif name==\"pen\":
    self.drawCad.bind(\"<B1-Motion>\", self.myPen)
  elif name==\"earsor\":
    self.drawCad.bind(\"<B1-Motion>\", self.myEarsor)
  elif name==\"clear\":
    self.drawCad.delete(\"all\")
  elif name==\"color\":
   c= askcolor(color=self.fgcolor,title=\"画笔选择颜色\")
    self.fgcolor=c[1]

def myline(self,event):
  self.startDraw(event)
  self.lastDraw=self.drawCad.create_line(self.x,self.y,event.x,event.y,fill=self.fgcolor)

def mylineArrow(self,event):
  self.startDraw(event)
  self.lastDraw = self.drawCad.create_line(self.x, self.y, event.x, event.y,arrow=LAST , fill=self.fgcolor)

def myRect(self,event):
  self.startDraw(event)
  self.lastDraw = self.drawCad.create_rectangle(self.x, self.y, event.x, event.y, outline=self.fgcolor)

def myPen(self,event):
  self.startDraw(event)
  self.drawCad.create_rectangle(self.x, self.y, event.x, event.y, outline=self.fgcolor)
  self.x=event.x
  self.y=event.y
def myEarsor(self,event):
  self.startDraw(event)
  self.drawCad.create_rectangle(event.x-4, event.y-4, event.x+4, event.y+4, fill=self.bgcolor)
  self.x = event.x
  self.y = event.y
def stopDraw(self,event):
  self.startDrawFlag=False
  self.lastDraw=0

def startDraw(self,event):
  self.drawCad.delete(self.lastDraw)
  if not self.startDrawFlag:
    self.startDrawFlag = True
    self.x = event.x
    self.y = event.y
root=Tk()
app=Application(root)
root.title(\"简易的画图工具\")
root.geometry(str(win_width)+\"x\"+str(win_height)+\"+100+100\")
root.mainloop()

结果展示