Tkinter教程之Canvas篇(3)

'''Tkinter教程之Canvas篇(3)'''

'''16.移动item'''

# -*- coding: cp936 -*-

# move指定x,y在偏移量

from Tkinter import *

root = Tk()

# 创建一个Canvas，设置其背景色为白色

rt1 = cv.create_rectangle(
10,10,110,110,
tags = ('r1','r2','r3'))
cv.create_rectangle(
10,10,110,110,
tags = ('r1','r2','r3')) 

cv.move(rt1,20,-10)
cv.pack()
root.mainloop() 

from Tkinter import *
root = Tk()
cv = Canvas(root,bg = 'white') 

rt1 = cv.create_rectangle(
10,10,110,110,
tags = ('r1','r2','r3'))
r2 = cv.create_rectangle(
20,20,110,110,
tags = ('s1','s2','s3')) 

# 使用id删除rt1

cv.delete(rt1)

# 使用tag删除r2

cv.delete('s1')
cv.pack()
root.mainloop() 

from Tkinter import *
root = Tk()
cv = Canvas(root,bg = 'white') 

rt1 = cv.create_rectangle(
10,10,110,110,
tags = ('r1','r2','r3')) 

cv.scale(rt1,0,0,1,2)
cv.pack()
root.mainloop() 

# scale的参数为(self,xoffset,yoffset,xscale,yscale)

'''19.绑定item与event'''

# -*- coding: cp936 -*-

# 使用tag_bind来绑定item与事件

from Tkinter import *
root = Tk() 

rt1 = cv.create_rectangle(
10,10,110,110,
width = 8,
tags = ('r1','r2','r3'))
def printRect(event):
print 'rectangle' 

cv.tag_bind('r1','<Button-1>',printRect)
cv.pack()
root.mainloop() 

from Tkinter import *
root = Tk() 

rt1 = cv.create_rectangle(
10,10,110,110,
width = 8,
tags = ('r1','r2','r3'))
def printRect(event):
print 'rectangle'
def printLine(event):
print 'line' 

cv.tag_bind('r1','<Button-3>',printLine)
cv.pack()
root.mainloop() 

from Tkinter import *
root = Tk() 

rt1 = cv.create_rectangle(
10,10,110,110,
width = 8,
tags = ('r1','r2','r3'))
def printRect(event):
print 'rectangle'
def printLine(event):
print 'line' 

cv.create_line(10,200,100,200,width = 5,tags = 'r1')
cv.pack()
root.mainloop() 

# 将事件与tag('r1')绑定后，创建新的item并指定已绑定事件的tag,新创建的item同样也与事件绑定，这个与参考上的说法也不一致

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