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

来源：https://blog.csdn.net/qq_43804570/article/details/108215102