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Commit9cc4e30

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working PlayerAnimation with example
1 parentdf926b7 commit9cc4e30

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3 files changed

+255
-15
lines changed

3 files changed

+255
-15
lines changed
Lines changed: 51 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,51 @@
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"""
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=====
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Decay
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=====
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This example showcases:
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- using PlayerAnimation
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- using blitting
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- changing axes limits during an animation.
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"""
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importitertools
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importnumpyasnp
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importmatplotlib.pyplotasplt
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frommatplotlib.animationimportPlayerAnimation,FuncAnimation
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importmath
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defdata_gen():
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forcntinitertools.count():
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yieldcnt
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definit(val):
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globalline
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print(f"init with val:{val}")
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ifnot"line"inglobals():
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line,=ax.plot([], [],lw=2)
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ax.grid()
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ax.set_ylim(-1.1,1.1)
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ax.set_xlim(0,1+math.floor(val/10))
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line.set_data([], [])
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return [line]
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fig,ax=plt.subplots()
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defupdate_plot(i):
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# update the data
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xdata=np.linspace(-10,10,1000)
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ydata=np.sin(xdata+i*0.1)
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_,xmax=ax.get_xlim()
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new_xmax=1+math.floor(i/10)
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ifxmax!=new_xmax:
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ax.set_xlim(0,new_xmax)
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ax.figure.canvas.draw_idle()
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line.set_data(xdata,ydata)
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return [line]
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animation=PlayerAnimation(fig=fig,func=update_plot,init_func=init,interval=100,blit=True,valstep=0.5)
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plt.show()

‎lib/matplotlib/animation.py

Lines changed: 106 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -40,6 +40,9 @@
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DISPLAY_TEMPLATE,INCLUDED_FRAMES,JS_INCLUDE,STYLE_INCLUDE)
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frommatplotlibimport_api,cbook
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frommatplotlib.widgetsimportButton,Slider
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importmpl_toolkits.axes_grid1
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fromfunctoolsimportpartial
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_log=logging.getLogger(__name__)
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@@ -1764,3 +1767,106 @@ def _draw_frame(self, framedata):
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forainself._drawn_artists:
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a.set_animated(self._blit)
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classPlayerAnimation(FuncAnimation):
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# inspired from https://stackoverflow.com/a/46327978/3949028
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PLAY_SYMBOL="$\u25B6$"
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STOP_SYMBOL="$\u25A0$"
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PAUSE_SYMBOL="$\u23F8$"#TODO use instead of STOP_SYMBOL, but doesn't work in Button.label
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ONE_BACK_SYMBOL="$\u29CF$"
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ONE_FORWARD_SYMBOL="$\u29D0$"
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def__init__(self,func,init_func,min_value=0,max_value=100,
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pos=(0.125,0.92),valstep=1,**kwargs):
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self.val=min_value
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self.min=min_value
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self.max=max_value
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self.direction=1
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self.caller_func=func
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self.valstep=valstep
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self._player_initiated=False
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#https://github.com/matplotlib/matplotlib/issues/17685
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definit_func_wrapper():
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returninit_func(self.val)
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super().__init__(func=self._func_wrapper,frames=self._frame_generator,
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init_func=init_func_wrapper,**kwargs)
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self._setup_player(pos)
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def_setup_player(self,pos):
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ifnotself._player_initiated:
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self._player_initiated=True
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playerax=self._fig.add_axes([pos[0],pos[1],0.64,0.04])
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divider=mpl_toolkits.axes_grid1.make_axes_locatable(playerax)
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sax=divider.append_axes("right",size="80%",pad=0.05)
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ofax=divider.append_axes("right",size="100%",pad=0.05)
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sliderax=divider.append_axes("right",size="500%",pad=0.07)
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self.button_oneback=Button(playerax,label=self.ONE_BACK_SYMBOL,useblit=self._blit)
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self.play_pause_button=Button(sax,label=self.STOP_SYMBOL,useblit=self._blit)
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self.button_oneforward=Button(ofax,label=self.ONE_FORWARD_SYMBOL,useblit=self._blit)
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self.button_oneback.on_clicked(self.onebackward)
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self.play_pause_button.on_clicked(self.play_pause)
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self.button_oneforward.on_clicked(self.oneforward)
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self.slider=Slider(sliderax,'',self.min,self.max,valinit=self.min,valstep=self.valstep,useblit=self._blit)
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self.slider.on_changed(self.set_pos)
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def_frame_generator(self):
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whileTrue:
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next=self.val+self.direction*self.valstep
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ifnext>=self.minandnext<=self.max:
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self.val=next
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print(f"yield:{self.val}")
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yieldself.val
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else:
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self.pause()
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print(f"pause, yield:{self.val}")
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yieldself.val
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defpause(self,event=None):
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super().pause()
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self.direction=0
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self.play_pause_button.label.set_text(self.PLAY_SYMBOL)
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self.play_pause_button._draw()
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defresume(self,event=None):
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self.direction=1
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self.play_pause_button.label.set_text(self.STOP_SYMBOL)
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self.play_pause_button._draw()
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super().resume()
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defplay_pause(self,event=None):
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ifself.direction==0:
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self.resume()
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else:
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self.pause()
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defoneforward(self,event=None):
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self.direction=1
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self.trigger_step()
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defonebackward(self,event=None):
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self.direction=-1
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self.trigger_step()
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defset_pos(self,val):
1854+
ifisinstance(self.valstep,int):
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val=int(val)# slider gives float event if valstep is int
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ifself.val!=val:
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print(f"slider set_pos:{val}")
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self.val=val
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self.direction=0
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self.trigger_step()
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deftrigger_step(self):
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forainself._drawn_artists:
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a.set_animated(True)
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self._step()
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self.pause()
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def_func_wrapper(self,val):
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print(f"player _func_wrapper:{val}")
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self.slider.set_val(val)
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returnself.caller_func(self.val)
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