Mercurial > code > home > repos > light9
annotate Widgets/FlyingFader.py @ 59:001646cd5349
all mousewheel events everywhere will now pass up the tree to be caught by
all mousewheel events everywhere will now pass up the tree to be caught by
higher widgets. if things get slow, this might be the problem
| author | drewp |
|---|---|
| date | Tue, 09 Jul 2002 07:36:29 +0000 |
| parents | 065896b0913c |
| children | 15ead14b4dd1 |
| rev | line source |
|---|---|
| 52 | 1 from Tix import * |
| 24 | 2 from time import time,sleep |
| 3 from __future__ import division | |
| 4 | |
| 5 class Mass: | |
| 6 def __init__(self): | |
| 7 self.x=0 # position | |
| 8 self.xgoal=0 # position goal | |
| 9 | |
| 10 self.v=0 # velocity | |
| 11 self.maxspeed = .8 # maximum speed, in position/second | |
| 12 self.maxaccel = 3 # maximum acceleration, in position/second^2 | |
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13 self.eps = .03 # epsilon - numbers within this much are considered the same |
| 24 | 14 |
| 15 self._lastupdate=time() | |
| 16 self._stopped=1 | |
| 17 | |
| 18 def equal(self,a,b): | |
| 19 return abs(a-b)<self.eps | |
| 20 | |
| 21 def stop(self): | |
| 22 self.v=0 | |
| 23 self.xgoal=self.x | |
| 24 self._stopped=1 | |
| 25 | |
| 26 def update(self): | |
| 27 t0 = self._lastupdate | |
| 28 tnow = time() | |
| 29 self._lastupdate = tnow | |
| 30 | |
| 31 dt = tnow-t0 | |
| 32 | |
| 33 self.x += self.v*dt | |
| 34 # hitting the ends stops the slider | |
| 35 if self.x>1: self.v=max(self.v,0); self.x=1 | |
| 36 if self.x<0: self.v=min(self.v,0); self.x=0 | |
| 37 | |
| 38 if self.equal(self.x,self.xgoal): | |
| 39 self.x=self.xgoal # clean up value | |
| 40 self.stop() | |
| 41 return | |
| 42 | |
| 43 self._stopped=0 | |
| 44 dir = (-1.0,1,0)[self.xgoal>self.x] | |
| 45 | |
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46 if abs(self.xgoal-self.x) < abs(self.v*5*dt): |
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47 # apply the brakes on the last 5 steps |
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48 dir *= -.5 |
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49 |
| 24 | 50 self.v += dir*self.maxaccel*dt # velocity changes with acceleration in the right direction |
| 51 self.v = min(max(self.v,-self.maxspeed),self.maxspeed) # clamp velocity | |
| 52 | |
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53 #print "x=%+.03f v=%+.03f a=%+.03f %f" % (self.x,self.v,self.maxaccel,self.xgoal) |
| 24 | 54 |
| 55 def goto(self,newx): | |
| 56 self.xgoal=newx | |
| 57 | |
| 58 def ismoving(self): | |
| 59 return not self._stopped | |
| 0 | 60 |
| 61 class FlyingFader(Frame): | |
| 31 | 62 def __init__(self, master, variable, label, fadedur=1.5, font=('Arial', 8), labelwidth=12, |
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63 **kw): |
| 0 | 64 Frame.__init__(self, master) |
| 65 self.name = label | |
| 66 self.variable = variable | |
| 67 | |
| 24 | 68 self.mass = Mass() |
| 69 | |
| 0 | 70 self.config({'bd':1, 'relief':'raised'}) |
| 22 | 71 scaleopts = {'variable' : variable, 'showvalue' : 0, 'from' : 1.0, |
| 31 | 72 'to' : 0, 'res' : 0.001, 'width' : 20, 'length' : 200, 'orient':'vert'} |
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73 scaleopts.update(kw) |
| 31 | 74 if scaleopts['orient']=='vert': |
| 75 side1=TOP | |
| 76 side2=BOTTOM | |
| 77 else: | |
| 78 side1=RIGHT | |
| 79 side2=LEFT | |
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80 |
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81 self.scale = Scale(self, scaleopts) |
| 22 | 82 self.vlabel = Label(self, text="0.0", width=6, font=font) |
| 31 | 83 self.label = Label(self, text=label, font=font, anchor='w',width=labelwidth) #wraplength=40, ) |
| 0 | 84 |
| 85 self.oldtrough = self.scale['troughcolor'] | |
| 86 | |
| 31 | 87 self.scale.pack(side=side2, expand=1, fill=BOTH, anchor='c') |
| 88 self.vlabel.pack(side=side2, expand=0, fill=X) | |
| 89 self.label.pack(side=side2, expand=0, fill=X) | |
| 0 | 90 |
| 91 for k in range(1, 10): | |
| 92 self.scale.bind("<Key-%d>" % k, | |
| 20 | 93 lambda evt, k=k: self.newfade(k / 10.0, evt)) |
| 0 | 94 |
| 24 | 95 self.scale.bind("<Key-0>", lambda evt: self.newfade(1.0, evt)) |
| 0 | 96 self.scale.bind("<grave>", lambda evt: self.newfade(0, evt)) |
| 97 | |
| 98 self.scale.bind("<1>", self.cancelfade) | |
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99 self.scale.bind("<2>", self.cancelfade) |
| 0 | 100 self.scale.bind("<3>", self.mousefade) |
| 101 | |
| 50 | 102 self.trace_ret = self.variable.trace('w', self.updatelabel) |
| 103 self.bind("<Destroy>",self.ondestroy) | |
| 104 | |
| 105 def ondestroy(self,*ev): | |
| 106 self.variable.trace_vdelete('w',self.trace_ret) | |
| 0 | 107 |
| 108 def cancelfade(self, evt): | |
| 24 | 109 self.fadegoal = self.variable.get() |
| 110 self.fadevel = self.fadeacc = 0 | |
| 111 | |
| 0 | 112 self.scale['troughcolor'] = self.oldtrough |
| 113 | |
| 114 def mousefade(self, evt): | |
| 115 target = float(self.tk.call(self.scale, 'get', evt.x, evt.y)) | |
| 116 self.newfade(target, evt) | |
| 117 | |
| 24 | 118 def ismoving(self): |
| 119 return self.fadevel!=0 or self.fadeacc!=0 | |
| 22 | 120 |
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121 def newfade(self, newlevel, evt=None, length=None): |
| 24 | 122 |
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123 # these are currently unused-- Mass needs to accept a speed input |
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124 mult = 1 |
| 0 | 125 if evt.state & 8 and evt.state & 4: mult = 0.25 # both |
| 126 elif evt.state & 8: mult = 0.5 # alt | |
| 127 elif evt.state & 4: mult = 2 # control | |
| 128 | |
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129 |
| 24 | 130 self.mass.x = self.variable.get() |
| 131 self.mass.goto(newlevel) | |
| 0 | 132 |
| 133 self.gofade() | |
| 134 | |
| 135 def gofade(self): | |
| 24 | 136 self.mass.update() |
| 137 self.variable.set(self.mass.x) | |
| 138 | |
| 139 if not self.mass.ismoving(): | |
| 0 | 140 self.scale['troughcolor'] = self.oldtrough |
| 141 return | |
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drewp
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142 |
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143 # blink the trough while the thing's moving |
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144 if time()%.4>.2: |
| 27 | 145 # self.scale.config(troughcolor=self.oldtrough) |
| 146 self.scale.config(troughcolor='orange') | |
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147 else: |
| 27 | 148 # self.scale.config(troughcolor='white') |
| 149 self.scale.config(troughcolor='yellow') | |
| 24 | 150 |
| 151 # colorfade(self.scale, percent) | |
| 22 | 152 self.after(30, self.gofade) |
| 0 | 153 |
| 154 def updatelabel(self, *args): | |
| 52 | 155 if self.variable: |
| 156 self.vlabel['text'] = "%.3f" % self.variable.get() | |
| 24 | 157 # if self.fadetimes[1] == 0: # no fade |
| 158 # self.vlabel['fg'] = 'black' | |
| 159 # elif self.curfade[1] > self.curfade[0]: | |
| 160 # self.vlabel['fg'] = 'red' | |
| 161 # else: | |
| 162 # self.vlabel['fg'] = 'blue' | |
| 0 | 163 |
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164 def get(self): |
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165 return self.scale.get() |
| 0 | 166 |
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167 def set(self, val): |
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168 self.scale.set(val) |
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169 |
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170 def colorfade(scale, lev): |
| 0 | 171 low = (255, 255, 255) |
| 172 high = (0, 0, 0) | |
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173 out = [int(l+lev*(h-l)) for h, l in zip(high,low)] |
| 0 | 174 col="#%02X%02X%02X" % tuple(out) |
| 175 scale.config(troughcolor=col) | |
| 176 | |
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parents:
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177 |
| 0 | 178 if __name__ == '__main__': |
| 179 root = Tk() | |
| 180 root.tk_focusFollowsMouse() | |
| 181 | |
| 182 FlyingFader(root, variable=DoubleVar(), label="suck").pack(side=LEFT, | |
| 183 expand=1, fill=BOTH) | |
| 184 FlyingFader(root, variable=DoubleVar(), label="moof").pack(side=LEFT, | |
| 185 expand=1, fill=BOTH) | |
| 186 FlyingFader(root, variable=DoubleVar(), label="zarf").pack(side=LEFT, | |
| 187 expand=1, fill=BOTH) | |
| 188 FlyingFader(root, variable=DoubleVar(), | |
| 189 label="long name goes here. got it?").pack(side=LEFT, expand=1, | |
| 190 fill=BOTH) | |
| 191 | |
| 192 root.mainloop() |