python实现画图工具

﹏ヽ暗。殇╰゛Y 2022-12-23 07:17 82阅读 0赞

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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

![Image 1][]

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[Image 1]: