from tkinter import *
from tkinter.filedialog import *
from tkinter.colorchooser import *
win_width = 900
win_heigt = 450
class Application(Frame):
def __init__(self, master=None, bgcolor="#000000"):
super().__init__(master) # super代表的是父类的定义，而不是父类的对象
self.master = master
self.bgcolor = bgcolor
self.x = 0
self.y = 0
self.lastDraw = 0 # 表示最后绘制图形的位置id
self.fgcolor = "#ff0000"
self.startDrawFlag = False # 来标记最初的位置
self.pack()
self.createWidget()
def createWidget(self):
"""创建绘图区"""
self.drawpad = Canvas(root, width=win_width, height=win_heigt*0.8,bg=self.bgcolor)
self.drawpad.pack()
# 创建按钮
bin_start = Button(root,text="开始", name="start") # name 类似id,更好的区别按钮，为了配合后面函数使用
bin_start.pack(side="left", padx="10") # padx间距10
bin_pen = Button(root, text="画笔", name="pen")
bin_pen.pack(side="left", padx="10")
bin_rect = Button(root,text="矩形", name="rect")
bin_rect.pack(side="left", padx="10")
bin_clear = Button(root,text="清屏", name="clear")
bin_clear.pack(side="left", padx="10")
bin_erasor = Button(root,text="橡皮擦", name="erasor")
bin_erasor.pack(side="left", padx="10")
bin_line = Button(root,text="直线", name="line")
bin_line.pack(side="left", padx="10")
bin_lineArrow = Button(root,text="箭头直线", name="lineArrow")
bin_lineArrow.pack(side="left", padx="10")
bin_color = Button(root,text="颜色", name="color")
bin_color.pack(side="left", padx="10")
#事件处理
bin_pen.bind_class("Button", "<1>", self.eventManager)
self.drawpad.bind("<ButtonRelease-1>", self.stopDrow) # <ButtonRelease-1>释放鼠标左键
# 增加颜色切换的快捷键
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) # <B1-Motion> 鼠标左键拖动
elif name == "lineArrow":
self.drawpad.bind("<B1-Motion>", self.mylineArow)
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 stopDrow(self, event):
self.startDrawFlag = False
self.lastDraw = 0
def startDrow(self, event):
self.drawpad.delete(self.lastDraw)
if not self.startDrawFlag: # 判断是不是第一次绘画
self.startDrawFlag = True
self.x = event.x # x的位置就是一开始位置的x
self.y = event.y
def myline(self, event):
self.startDrow(event)
self.lastDraw = self.drawpad.create_line(self.x, self.y, event.x, event.y, fill=self.fgcolor)
def mylineArow(self, event):
self.startDrow(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.startDrow(event)
self.lastDraw = self.drawpad.create_rectangle(self.x, self.y, event.x, event.y, outline=self.fgcolor)
def mypen(self, event):
self.startDrow(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.startDrow(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_heigt)+"+300+300")
root.title("画图软件")
app = Application(master=root)
root.mainloop()老师 我这个快捷键变颜色没办法使用，按对应的键就会跳出来输入法
老师 请问 这里边 
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