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

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。