"""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？
老师，有几点理解，您看看对不对
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