"""画图本的基本编程"""
from tkinter.filedialog import *
from tkinter.colorchooser import *
"""窗口的宽度和高度"""
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
self.startDrawFlag = False
self.pack()
self.creakWidget()
def creakWidget(self):
"""创建绘图区域"""
self.drawpad = Canvas(root, width=win_width, height=win_height*0.9, bg=self.bgcolor)
self.drawpad.pack()
"""创建按钮"""
btn_start = Button(root, text="开始", name="start")
btn_start.pack(side="left", padx=10)
btn_pen = Button(root, text="画笔", name="pen")
btn_pen.pack(side="left", padx=10)
btn_rect = Button(root, text="矩形", name="rect")
btn_rect.pack(side="left", padx=10)
btn_clear = Button(root, text="清屏", name="clear")
btn_clear.pack(side="left", padx=10)
btn_erasor = Button(root, text="橡皮擦", name="erasor")
btn_erasor.pack(side="left", padx=10)
btn_line = Button(root, text="直线", name="line")
btn_line.pack(side="left", padx=10)
btn_lineArrow = Button(root, text="箭头直线", name="lineArrow")
btn_lineArrow.pack(side="left", padx=10)
btn_color = Button(root, text="颜色", name="color")
btn_color.pack(side="left", padx=10)
"""事件的处理"""
btn_pen.bind_class("Button", "<1>", self.eventManager)
self.drawpad.bind("<ButtonRelease-1>", self.stopDraw)
"""增添颜色快捷键处理"""
root.bind("<KeyPress-r>", self.kuaijiejian)
root.bind("<KeyPress-g>", self.kuaijiejian)
root.bind("<KeyPress-y>", self.kuaijiejian)
def eventManager(self,event):
name = event.widget.winfo_name()
print(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 == "erasor":
self.drawpad.bind("<B1-Motion>", self.myErasor)
elif name == "clear":
self.drawpad.delete("all")
elif name == "color":
c = askcolor(color=self.fgcolor, title="选择画笔颜色")
self.fgcolor = c[1]
def startDraw(self,event):
self.drawpad.delete(self.lastDraw)
if not self.startDrawFlag:
self.startDrawFlag = True
self.x = event.x
self.y = event.y
def stopDraw(self,event):
self.startDrawFlag = False
self.lastDraw = 0
def myLine(self,event):
self.startDraw(event)
self.lastDraw = self.drawpad.create_line(self.x, self.y, event.x, event.y, fill=self.fgcolor)
def mylineArrow(self,event):
self.startDraw(event)
self.lastDraw = self.drawpad.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.drawpad.create_rectangle(self.x, self.y, event.x, event.y, outline=self.fgcolor)
def myPen(self,event):
self.startDraw(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 myErasor(self,event):
self.startDraw(event)
self.drawpad.create_rectangle(event.x-5, event.y-5, event.x, event.y, fill=self.bgcolor)
self.x = event.x
self.y = event.y
def kuaijiejian(self,event):
if event.char == "r":
self.fgcolor = "#ff0000"
if event.char == "g":
self.fgcolor = "#00ff00"
if event.char == "y":
self.fgcolor = "#ffff00"
if __name__ == "__main__":
root = Tk()
root.geometry(str(win_width)+"x"+str(win_height)+"+200+300")
root.title("画图简易本")
app = Application(master=root)
root.mainloop()老师我想问一下，怎么修改代码才能让画出的直线的颜色不停的变化，我想用for循环来实现，但是不知道怎么写。
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