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annotate light8/uihelpers.py @ 34:411de8b46aef

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the famous you-are-in-the-process-of-changing-this-light indicator. the famous you-are-in-the-process-of-changing-this-light indicator. red = going up blue = going down also, a generic color fader in uihelpers.py -- unused (as of now)
author dmcc
date Sun, 07 Jul 2002 12:06:16 +0000
parents e9d2e7754fd9
children 2ae11dc56b38
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1 """all the tiny tk helper functions"""
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2
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3 from Tkinter import *
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4 from types import StringType
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5
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6 def make_frame(parent):
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7 f = Frame(parent, bd=0)
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8 f.pack(side='left')
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9 return f
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10
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11 def bindkeys(root,key, func):
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12 root.bind(key, func)
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13 for w in root.winfo_children():
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14 w.bind(key, func)
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15
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16 def toplevelat(x,y,w=None,h=None):
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17 tl=Toplevel()
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18 if w and h:
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19 tl.wm_geometry("%dx%d+%d+%d"%(w,h,x,y))
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20 else:
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21 tl.wm_geometry("+%d+%d"%(x,y))
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22 return tl
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23
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24 def toggle_slider(s):
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25 if s.get() == 0:
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26 s.set(100)
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27 else:
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28 s.set(0)
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29
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30 # for lambda callbacks
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31 def printout(t):
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32 print t
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33
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34 def colorlabel(label):
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35 """color a label based on its own text"""
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36 txt=label['text'] or "0"
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37 lev=float(txt)/100
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38 low=(80,80,180)
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39 high=(255,55,050)
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40 out = [int(l+lev*(h-l)) for h,l in zip(high,low)]
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41 col="#%02X%02X%02X" % tuple(out)
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42 label.config(bg=col)
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43
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44 # TODO: get everyone to use this
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45 def colorfade(low, high, percent):
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46 '''not foolproof. make sure 0 < percent < 1'''
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47 out = [int(l+percent*(h-l)) for h,l in zip(high,low)]
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48 col="#%02X%02X%02X" % tuple(out)
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49 return col
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50
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51 def colortotuple(anytkobj, colorname):
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52 'pass any tk object and a color name, like "yellow"'
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53 rgb = anytkobj.winfo_rgb(colorname)
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54 return [v / 256 for v in rgb]
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55
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56 class Togglebutton(Button):
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57 """works like a single radiobutton, but it's a button so the label's on the button face, not to the side"""
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58 def __init__(self,parent,**kw):
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59 if kw['variable']:
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60 self.variable = kw['variable']
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61 self.variable.trace('w',self.varchanged)
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62 del kw['variable']
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63 else:
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64 self.variable=None
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65 self.oldcommand = kw.get('command',None)
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66 kw['command'] = self.invoke
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67 Button.__init__(self,parent,**kw)
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68
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69 self.origbkg = self.cget('bg')
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70
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71 self.state=0
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72 if self.variable:
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73 self.state = self.variable.get()
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74
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75 self.setstate(self.state)
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76
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77 self.bind("<Enter>",lambda ev: self.setstate)
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78 self.bind("<Leave>",lambda ev: self.setstate)
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79
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80 def varchanged(self,*args):
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81 self.setstate(self.variable.get())
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82
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83 def invoke(self):
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84 self.setstate(not self.state)
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85
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86 if self.oldcommand:
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87 self.oldcommand()
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88
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89 def setstate(self,newstate):
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90 self.variable.set(newstate)
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91 if newstate: # set
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92 self.tk.call('tkButtonDown',self)
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93 self.config(bg='green')
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94 else: # unset
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95 self.tk.call('tkButtonUp',self)
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96 self.config(bg=self.origbkg)
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97 return "break"