# coding=utf-8
"""开发画图软件测试
"""
from tkinter.filedialog import *
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,bgcolor="#000000"):
super().__init__(master) # super()代表的是父类的定义，而不是父类对象
self.master = master
self.bgcolor=bgcolor
self.x=0
self.y=0
self.fgcolor="#ff0000"
self.lastDraw=0 # 表示最后绘制的图形
self.startDrawFlag=False
self.pack()
self.createWidget()
def createWidget(self):
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")
bth_oval=Button(root, text="椭圆", name="oval")
bth_oval.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
# bind_class 同类事件的统一绑定，这里是Button按键类的事件绑定-鼠标左键条件
# self.drawpad.bind("")
btn_pen.bind_class("Button","<1>",self.eventManager)
self.drawpad.bind("<ButtonRelease-1>",self.stopDraw)
# 增加颜色的快捷键处理
root.bind("<KeyPress-r>",self.kuaijiejian)
root.bind("<KeyPress-g>",self.kuaijiejian)
root.bind("<KeyPress-y>",self.kuaijiejian)
# 添加渐变颜色的处理
root.bind("<KeyPress-j>",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=="pen":
self.drawpad.bind("<B1-Motion>",self.myPen)
elif name=="rect":
self.drawpad.bind("<B1-Motion>",self.myRect)
elif name=="oval":
self.drawpad.bind("<B1-Motion>",self.myOval)
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")
# [(255,0,0),"#ff0000"]
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 myOval(self,event):
self.startDraw(event)
self.lastDraw=self.drawpad.create_oval(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-10,self.y-10,event.x+10,event.y+10,outline=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"
elif event.char=="j":
b=["#00ff00","#ff0000","#ffff00"]
for i in range(3,333):
l=i%3
self.fgcolor=b[l]
if __name__ == '__main__':
root = Tk()
root.geometry(str(win_width)+"x"+str(win_height)+"+200+300")
root.title("画图软件")
app = Application(master=root)
root.mainloop()老师，渐变颜色怎么弄了。
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