"""小小画笔"""from tkinter import *from tkinter.filedialog import *from tkinter.colorchooser import *height_root = 450width_root = 900class Application(Frame): def __init__(self, master=None,bgcolors="#000000"): super().__init__(master) # super()代表的是父类的定义，而不是父类对象 self.master = master self.bgcolors = bgcolors self.pack() self.createWidget() self.x = 0 self.y = 0 self.fgcolor = "#ff0000" self.lastdrawLine = 0 self.drawFlag = FALSE def createWidget(self): #创建画图区域 self.drawPad = Canvas(root, width=width_root, height=height_root*0.9, bg=self.bgcolors) self.drawPad.pack() #创建按钮 btn_start = Button(text="开始", name="start") btn_start.pack(side="left",padx=10) btn_pen = Button(text="画笔", name="pen") btn_pen.pack(side="left", padx=10) btn_rect = Button(text="矩形", name="rect") btn_rect.pack(side="left", padx=10) btn_clear = Button(text="清屏", name="clear") btn_clear.pack(side="left", padx=10) btn_earsor = Button(text="橡皮差", name="earsor") btn_earsor.pack(side="left", padx=10) btn_line = Button(text="直线", name="line") btn_line.pack(side="left", padx=10) btn_lineArrow = Button(text="箭头直线", name="lineArrow") btn_lineArrow.pack(side="left", padx=10) btn_color = Button(text="颜色", name="color") btn_color.pack(side="left", padx=10) btn_pen.bind_class("Button", "<1>", self.eventManager) self.drawPad.bind("<ButtonRelease-1>", self.drawFlagRelease) def eventManager(self,event): name = event.widget.winfo_name() if name == "line": self.drawPad.bind("<B1-Motion>", self.myline) elif name == "lineArrow": self.drawPad.bind("<B1-Motion>", self.mylineArrow) elif name == "rect": self.drawPad.bind("<B1-Motion>", self.myrect) elif name == "pen": self.drawPad.bind("<B1-Motion>", self.mypen) elif name == "earsor": self.drawPad.bind("<B1-Motion>", self.myearsor) elif name == "clear": self.drawPad.delete("all") elif name == "color": colorpen = askcolor(color="red", title="请选择画笔颜色") self.fgcolor = colorpen[1] def drawFlagRelease(self,event): self.drawFlag = FALSE self.lastdrawLine = 0 def drawStartMove(self,event): self.drawPad.delete(self.lastdrawLine) if not self.drawFlag: self.drawFlag = True self.x = event.x self.y = event.y def myline(self, event): self.drawStartMove(event) self.lastdrawLine = self.drawPad.create_line(self.x, self.y, event.x, event.y, fill=self.fgcolor) def mypen(self, event): self.drawStartMove(event) self.drawPad.create_line(self.x, self.y, event.x, event.y, fill=self.fgcolor) self.x = event.x self.y = event.y def myearsor(self, event): self.drawStartMove(event) self.drawPad.create_rectangle(event.x-4, event.y-4, event.x+4, event.y+4, fill=self.bgcolors) def mylineArrow(self,event): self.drawStartMove(event) self.lastdrawLine = self.drawPad.create_line(self.x, self.y, event.x,event.y, arrow=LAST, fill=self.fgcolor) def myrect(self, event): self.drawStartMove(event) self.lastdrawLine = self.drawPad.create_rectangle(self.x, self.y, event.x, event.y, outline=self.fgcolor)if __name__ == '__main__': root = Tk() root.geometry(str(width_root)+"x"+str(height_root)+"+200+300") root.title("党京伟的一个画笔软件") app = Application(master=root) root.mainloop()
来源：https://www.cnblogs.com/dangjingwei/p/12288435.html