Python3 Tkinter-Canvas

1.创建

from tkinter import *

root=Tk()

cv=Canvas(root,bg='black')
cv.pack()

root.mainloop()

2.创建item

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
cv.create_rectangle(10,10,110,110)
cv.pack()

root.mainloop()

3.填充颜色

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
cv.create_rectangle(10,10,110,110,fill='red')
cv.pack()

root.mainloop()

4.边框颜色

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
cv.create_rectangle(10,10,110,110,outline='red')
cv.pack()

root.mainloop()

5.边框宽度

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
cv.create_rectangle(10,10,110,110,outline='red',width=5)
cv.pack()

root.mainloop()

6.画虚线

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
cv.create_rectangle(10,10,110,110,outline='red',dash=10)
cv.pack()

root.mainloop()

7.创建tags

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
rt=cv.create_rectangle(10,10,110,110,tags='r1')
cv.pack()

print(cv.gettags(rt))
cv.itemconfig(rt,tags=('r2','r3','r4'))
print(cv.gettags(rt))

root.mainloop()

8.使用相同tag

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
rt=cv.create_rectangle(10,10,110,110,tags=('r1','r2','r3'))
cv.pack()

print(cv.gettags(rt))
cv.create_rectangle(20,20,80,80,tags='r3')
print(cv.find_withtag('r3'))

root.mainloop()

9.通过tag访问item

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
rt=cv.create_rectangle(10,10,110,110,tags=('r1','r2','r3'))
cv.pack()

cv.create_rectangle(20,20,80,80,tags='r3')
for item in cv.find_withtag('r3'):
    cv.itemconfig(item,outline='blue')

root.mainloop()

10.向item添加tag

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
rt1=cv.create_rectangle(10,10,110,110,tags=('r1','r2','r3'))
rt2=cv.create_rectangle(20,20,80,80,tags=('s1','s2','s3'))
rt3=cv.create_rectangle(30,30,70,70,tags=('y1','y2','y3'))

cv.addtag_above('r4',rt2)
cv.addtag_below('r5',rt2)

for item in [rt1,rt2,rt3]:
    print(cv.gettags(item))
cv.pack()

root.mainloop()

11.返回其他item

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
rt1=cv.create_rectangle(10,10,110,110,tags=('r1','r2','r3'))
rt2=cv.create_rectangle(20,20,80,80,tags=('s1','s2','s3'))
rt3=cv.create_rectangle(30,30,70,70,tags=('y1','y2','y3'))

cv.itemconfig(cv.find_above(rt2),outline='red')
cv.itemconfig(cv.find_below(rt2),outline='green')
cv.pack()

root.mainloop()

12.改变item在stack的顺序

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
rt1=cv.create_rectangle(10,10,110,110,tags=('r1','r2','r3'))
rt2=cv.create_rectangle(20,20,80,80,tags=('s1','s2','s3'))
rt3=cv.create_rectangle(30,30,70,70,tags=('y1','y2','y3'))

cv.tag_lower(rt3)
cv.tag_raise(rt1)
cv.itemconfig(cv.find_above(rt2),outline='red')
cv.itemconfig(cv.find_below(rt2),outline='green')
cv.pack()

root.mainloop()

13.移动item

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
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()

14.删除item

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
rt1=cv.create_rectangle(10,10,110,110,tags=('r1','r2','r3'))
rt2=cv.create_rectangle(20,20,80,80,tags=('s1','s2','s3'))
cv.delete(rt1)
cv.delete('s1')
cv.pack()

root.mainloop()

15.缩放item

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()

16.事件绑定

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
rt1=cv.create_rectangle(10,10,110,110,tags=('r1','r2','r3'))

def printRect(event):
    print('rectangle')

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

root.mainloop()

点击边框触发事件

17.弧形

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
cv.create_arc((10,10,110,110))
cv.pack()

root.mainloop()

18.弧形样式

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
d={1:PIESLICE,2:CHORD,3:ARC}
for i in d:
    cv.create_arc((10,10+60*i,110,110+60*i),style=d[i])
    print(i,d[i])
cv.pack()

root.mainloop()

19.弧形角度

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
d={1:PIESLICE,2:CHORD,3:ARC}
for i in d:
    cv.create_arc((10,10+60*i,110,110+60*i),style=d[i],start=30,extent=30)
    print(i,d[i])
cv.pack()

root.mainloop()

20.绘制位图

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
d={1:'error',2:'info',3:'question',4:'hourglass'}
for i in d:
    cv.create_bitmap((20*i,20*i),bitmap=d[i])

cv.pack()

root.mainloop()

21.直线

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
d=[(0,'none'),(1,'first'),(2,'last'),(3,'both')]
for i in d:
    cv.create_line((10,10+i[0]*20,110,110+i[0]*20),arrow=i[1],arrowshape='40 40 10')

cv.pack()

root.mainloop()

22.直线的joinstyle属性

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
d=[(0,'none','bevel'),(1,'first','miter'),(2,'last','round'),(3,'both','round')]
for i in d:
    cv.create_line((10,10+i[0]*20,110,110+i[0]*20),arrow=i[1],arrowshape='8 10 3',joinstyle=i[2])

cv.pack()

root.mainloop()

23.椭圆

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
cv.create_oval((10,10,210,110),fill='red')

cv.pack()

root.mainloop()

24.多边形

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
cv.create_polygon((10,10,10,200,100,200),fill='red')

cv.pack()

root.mainloop()

25.文本

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
cv.create_text((10,10),text='Hello Text',anchor=W)

cv.pack()

root.mainloop()

26.选中文本

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
txt=cv.create_text((10,10),text='Hello Text',anchor=W)
cv.select_from(txt,2)
cv.select_to(txt,6)
cv.pack()

root.mainloop()

27.创建组件

from tkinter import *

root=Tk()

cv=Canvas(root,bg='white')
def printWindow():
    print('window')

bt=Button(cv,text='ClickMe',command=printWindow)
cv.create_window((10,10),window=bt,anchor=W)
cv.create_line(10,10,20,20)
cv.create_line(30,30,100,100)
cv.pack()

root.mainloop()