"""开发画图软件的菜单"""
from tkinter.colorchooser import *
from tkinter import *
# 窗口的宽度和高度
win_width = 900
win_height = 450
class Application(Frame):
def __init__(self, master=None):
super().__init__(master)
self.master = master
self.bgcolor = "#000000"
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):
# 创建绘图区
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="笔画", 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")
# 事件处理
btn_pen.bind_class("<ButtonRelease-1>", self.eventManager)
self.drawpad.bind("<ButtonRelease-1>", self.stopDraw)
# 增加颜色切换快捷键处理
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="选择笔画颜色")
self.fgcolor = c[1]
def stopDraw(self, event):
self.startDrawFlag = False
self.lastDraw = 0
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 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-4, event.y-4, event.x+4, event.y+4, fill=self.bgcolor)
self.x = event.x
self.y = event.y
def kuaijiejian(self, event):
if event.char == "r":
self.fgcolor = "#ff0000"
elif event.char == "g":
self.fgcolor = "#00ff00"
elif event.char == "y":
self.fgcolor = "#ffff00"
if __name__ == '__main__':
root = Tk()
root.geometry(str(win_width) + "x" + str(win_height) + "+200+300")
root.title("画图软件项目")
app = Application(master=root)
root.mainloop()老师，这代码能运行，但是，点击组件按钮画画，没反映，可能事件获取有问题,还是什么的？
![1SSQP~]W2O81TS%WIB{7WYH.png](/ueditor/php/upload/image/20210329/1617024277621525.png "1617024277621525.png")
老师我想请问一下在这个布局下我想测试第四个测试是否被挤下一行的第一个，但是在内联样式设置第四个div背景为粉红色为什么没有显示出来呢？ 
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