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annotate editgraph.py @ 189:d0e3a13c1bd9 default tip

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Remove old calculator example
author Mike Pavone <pavone@retrodev.com>
date Fri, 07 Oct 2011 00:24:04 -0700
parents 0534bb8ee7ad
children
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23
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1 import Tkinter
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2 from tkFont import Font
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3
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4 class Call(object):
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5 def __init__(self, canvas, center, text = None, chars=None, padw = 20, padh = 4, fill="gray", outline="black",selectoutline="red"):
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6 x,y = center
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7 self.x = x
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8 self.y = y
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9 self.text = Tkinter.StringVar()
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10 self.textlen = 0
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11 if text != None:
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12 self.text.set(text)
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13 self.textlen = len(text)
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14 if chars == None:
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15 chars = len(text)+3
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16 elif chars == None:
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17 chars = 3
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18 self.textwidget = Tkinter.Entry(canvas, width=chars, textvariable=self.text, font=Font(family="Courier New", size=10))
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19 self.textwidget.bind('<Key>', self.textchanged, '+')
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20 self.canvastext = canvas.create_window(x, y, window=self.textwidget)
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21 box = canvas.bbox(self.canvastext)
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22 self.width = box[2]-box[0]+padw
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23 self.height = box[3]-box[1]+padh
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24 hw = self.width / 2
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25 hh = self.height / 2
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26 ow = hw+10
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27 self.poly = canvas.create_polygon(x-hw,y-hh, x+hw,y-hh, x+ow,y, x+hw,y+hh, x-hw,y+hh, x-ow,y, fill=fill, outline=outline)
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28 self.outline = outline
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29 self.selectoutline = selectoutline
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30 self.mousex = self.mousey = 0
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31
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32 def hittest(self, x, y):
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33 ow = self.width / 2 + 10
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34 hh = self.height / 2
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35 return abs(x-self.x) <= ow and abs(y-self.y) <= hh
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36
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37 def onclick(self, x, y):
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38 canvas.itemconfig(self.poly, outline=self.selectoutline)
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39 self.mousex = x
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40 self.mousey = y
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41
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42 def lostfocus(self):
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43 canvas.itemconfig(self.poly, outline=self.outline)
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44
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45 def ondrag(self, x, y):
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46 self.x += x-self.mousex
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47 self.y += y-self.mousey
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48 self.mousex = x
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49 self.mousey = y
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50 hw = self.width / 2
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51 hh = self.height / 2
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52 ow = hw+10
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53 canvas.coords(self.poly, self.x-hw,self.y-hh, self.x+hw,self.y-hh, self.x+ow,self.y, self.x+hw,self.y+hh, self.x-hw,self.y+hh, self.x-ow,self.y)
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54 canvas.coords(self.canvastext, self.x, self.y)
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55
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56 def textchanged(self,event):
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57 text = self.text.get()
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58 newlen = len(text)
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59 print text
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60 if newlen != self.textlen:
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61 print 'length changed'
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62 self.textlen = newlen
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63
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64 grabbed = None
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65 def onclick(event):
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66 global grabbed
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67 if grabbed != None:
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68 grabbed.lostfocus()
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69 grabbed = None
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70 print "Click"
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71 #TODO: Consider using quadtrees for performance
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72 for i in range(len(nodes)-1,-1,-1):
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73 node = nodes[i]
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74 if node.hittest(event.x, event.y):
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75 grabbed = node
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76 print "Found hit!"
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77 node.onclick(event.x, event.y)
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78 break
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79
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80 def ondrag(event):
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81 global grabbed
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82 if grabbed != None:
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83 grabbed.ondrag(event.x, event.y)
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84
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85 def ondoubleclick(event):
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86 global nodes
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87 nodes.append(Call(canvas, (event.x, event.y)))
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88
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89 root = Tkinter.Tk()
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90 canvas = Tkinter.Canvas(root, width=302,height=302)
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91 nodes = []
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92 nodes.append(Call(canvas, (50,40), "Foo"))
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93 canvas.bind('<Button-1>', onclick)
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94 canvas.bind('<B1-Motion>', ondrag)
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95 canvas.bind('<Double-Button-1>', ondoubleclick)
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96 canvas.pack()
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97 root.mainloop()