"""小小画笔"""
from tkinter import *
from tkinter.filedialog import *
from tkinter.colorchooser import *
height_root = 450
width_root = 900
class 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()
