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#!/usr/bin/python
import time
import numpy as np
import sys
import wx
from datetime import datetime
from wx.lib import masked
from floatcontrol import FloatCtrl
from wxmplot import PlotPanel
def next_data():
"simulated data"
t0 = time.time()
lt = time.localtime(t0)
dt0 = datetime.fromtimestamp(t0)
tmin, tsec = lt[4], lt[5]
u = np.random.random()
v = np.random.random()
x = np.sin( (u + tsec)/3.0) + tmin/30. + v/5.0
return dt0, x
class StripChartFrame(wx.Frame):
def __init__(self, parent, ID, **kws):
kws["style"] = wx.DEFAULT_FRAME_STYLE|wx.RESIZE_BORDER|wx.TAB_TRAVERSAL
wx.Frame.__init__(self, parent, ID, '',
wx.DefaultPosition, wx.Size(-1,-1), **kws)
self.SetTitle("wxmplot StripChart Demo")
self.tmin = 15.0
self.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.BOLD,False))
menu = wx.Menu()
menu_exit = menu.Append(-1, "E&xit", "Terminate the program")
menuBar = wx.MenuBar()
menuBar.Append(menu, "&File");
self.SetMenuBar(menuBar)
self.Bind(wx.EVT_MENU, self.OnExit, menu_exit)
self.Bind(wx.EVT_CLOSE, self.OnExit)
sbar = self.CreateStatusBar(2,wx.CAPTION)
sfont = sbar.GetFont()
sfont.SetWeight(wx.BOLD)
sfont.SetPointSize(11)
sbar.SetFont(sfont)
self.SetStatusWidths([-3,-1])
self.SetStatusText('',0)
mainsizer = wx.BoxSizer(wx.VERTICAL)
btnpanel = wx.Panel(self, -1)
btnsizer = wx.BoxSizer(wx.HORIZONTAL)
b_on = wx.Button(btnpanel, -1, 'Start', size=(-1,-1))
b_off = wx.Button(btnpanel, -1, 'Stop', size=(-1,-1))
b_on.Bind(wx.EVT_BUTTON, self.onStartTimer)
b_off.Bind(wx.EVT_BUTTON, self.onStopTimer)
tlabel = wx.StaticText(btnpanel, -1, ' Time range:')
self.time_range = FloatCtrl(btnpanel, size=(100, -1),
value=abs(self.tmin), precision=1)
btnsizer.Add(b_on, 0, wx.ALIGN_LEFT|wx.ALIGN_CENTER|wx.LEFT, 0)
btnsizer.Add(b_off, 0, wx.ALIGN_LEFT|wx.ALIGN_CENTER|wx.LEFT, 0)
btnsizer.Add(tlabel, 1, wx.GROW|wx.ALL|wx.ALIGN_LEFT|wx.LEFT, 0)
btnsizer.Add(self.time_range, 0, wx.ALIGN_LEFT|wx.ALIGN_CENTER|wx.LEFT, 0)
btnpanel.SetSizer(btnsizer)
btnsizer.Fit(btnpanel)
self.plotpanel = PlotPanel(self, messenger=self.write_message)
self.plotpanel.BuildPanel()
self.plotpanel.set_xlabel('Time from Present (s)')
mainsizer.Add(btnpanel, 0, wx.GROW|wx.ALIGN_LEFT|wx.LEFT, 0)
mainsizer.Add(self.plotpanel, 1, wx.GROW|wx.ALL|wx.ALIGN_LEFT|wx.LEFT, 0)
self.SetSizer(mainsizer)
mainsizer.Fit(self)
self.Bind(wx.EVT_TIMER, self.onTimer)
self.timer = wx.Timer(self)
self.count = 0
self.Refresh()
self.SetSize(self.GetBestVirtualSize())
wx.CallAfter(self.onStartTimer)
def write_message(self, msg, panel=0):
"""write a message to the Status Bar"""
self.SetStatusText(msg, panel)
def onStartTimer(self,event=None):
self.count = 0
t0,y0 = next_data()
self.ylist = [y0]
self.tlist = [t0]
self.tmin_last = -10000
self.time0 = time.time()
self.timer.Start(100)
def onStopTimer(self,event=None):
self.timer.Stop()
def onTimer(self, event):
self.count += 1
etime = time.time() - self.time0
self.tmin = float(self.time_range.GetValue())
t1, y1 = next_data()
self.tlist.append(t1)
self.ylist.append(y1)
if isinstance(t1, datetime):
t1 = t1.timestamp()
ts = [dt.timestamp()for dt in self.tlist]
else:
ts = [dt for dt in self.tlist]
del_ts = np.array(ts)-t1
mask = np.where(del_ts > -abs(self.tmin))
ydat = np.array(self.ylist)[mask]
tdat = np.array(self.tlist)[mask]
n = len(self.ylist)
if n <= 2:
self.plotpanel.plot(tdat, ydat)
else:
self.plotpanel.update_line(0, tdat, ydat, draw=True)
self.write_message("update %i points in %8.4f s" % (n,etime))
def OnAbout(self, event):
dlg = wx.MessageDialog(self, "wxmplot example: stripchart app",
"About WXMPlot test", wx.OK | wx.ICON_INFORMATION)
dlg.ShowModal()
dlg.Destroy()
def OnExit(self, event):
self.Destroy()
app = wx.App()
f = StripChartFrame(None,-1)
f.Show(True)
app.MainLoop()
#
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