python实现画图工具

 #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","",self.eventManger) self.drawCad.bind("",self.stopDraw) def eventManger(self,event): name=event.widget.winfo_name() print(name) if name=="line" : self.drawCad.bind("",self.myline) elif name=="lineArrow": self.drawCad.bind("", self.mylineArrow) elif name=="rect": self.drawCad.bind("", self.myRect) elif name=="pen": self.drawCad.bind("", self.myPen) elif name=="earsor": self.drawCad.bind("", 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()