"""测试一个经典的gui程序写法"""
from tkinter.filedialog import *
from tkinter.colorchooser import *
# 窗口的高度和宽度
win_width = 900
win_height = 450
class Application(Frame):
"""一个经典gui程序的写法"""
def __init__(self,master=None,bgcolor="#000000"):
super().__init__(master) # super（)代表父类定义
self.master = master
self.bgcolor = bgcolor
self.x = 0
self.y = 0
self.fgcolor = "#ff0000"
self.lastDraw = 0
self.startDrawFlag = False
self.pack()
self.creatWidget()
def creatWidget(self):
"""用画布创建绘图区"""
self.drawpad = Canvas(self, width=win_width,height=win_height*0.9,bg = self.bgcolor)
self.drawpad.pack()
# 创建按钮
self.btn_start = Button(self, text = "开始",name = "start") # 此处的name是为了后面进行事件的判断
self.btn_start.pack(side = "left",padx = "10")
self.btn_pen = Button(self, text="画笔", name="pen")
self.btn_pen.pack(side="left", padx="10")
self.btn_rect = Button(self, text="矩形", name="rect")
self.btn_rect.pack(side="left", padx="10")
self.btn_clear = Button(self, text="清屏", name="clear")
self.btn_clear.pack(side="left", padx="10")
self.btn_erasor = Button(self, text="橡皮擦", name="erasor")
self.btn_erasor.pack(side="left", padx="10")
self.btn_line = Button(self, text="直线", name="line")
self.btn_line.pack(side="left", padx="10")
self.btn_lineArrow = Button(self, text="箭头直线", name="lineArrow")
self.btn_lineArrow.pack(side="left", padx="10")
self.btn_color = Button(self, text="颜色", name="color")
self.btn_color.pack(side="left", padx="10")
# 事件处理
self.btn_pen.bind_class("Button", "<1>", self.eventManager)
self.drawpad.bind("<ButtonRelease-1>",self.stopDraw)
#增加颜色快捷键
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 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 # x,y为鼠标当前位置
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(self.x-4,self.y-4,event.x+4,event.y+4,fill=self.fgcolor)
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("百战程序员的画图软件")
app = Application( master = root)
root.mainloop()
一直显示eventManager 没定义方法，但这个不是事件的方法吗，头大，希望老师尽快解答，非常感谢
京公网安备 11011402011233号