power_state_control.py
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00001 # Software License Agreement (BSD License)
00002 #
00003 # Copyright (c) 2008, Willow Garage, Inc.
00004 # All rights reserved.
00005 #
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00009 #
00010 #  * Redistributions of source code must retain the above copyright
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00012 #  * Redistributions in binary form must reproduce the above
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00014 #    disclaimer in the documentation and/or other materials provided
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00032 
00033 import roslib
00034 roslib.load_manifest('elektron_dashboard')
00035 
00036 import wx
00037 
00038 from os import path
00039 
00040 def non_zero(value):
00041   if value < 0.00001 and value > -0.00001:
00042     return 0.00001
00043   return value
00044 
00045 
00046 class PowerStateControl(wx.Window):
00047   def __init__(self, parent, id, icons_path):
00048     wx.Window.__init__(self, parent, id, wx.DefaultPosition, wx.Size(60, 50))
00049 
00050     self._power_consumption = 0.0
00051     self._pct = 0
00052     self._time_remaining = 0.0
00053     self._ac_present = 0
00054 
00055     self._left_bitmap = wx.Bitmap(path.join(icons_path, "battery-minus.png"), wx.BITMAP_TYPE_PNG)
00056     self._right_bitmap = wx.Bitmap(path.join(icons_path, "battery-plus.png"), wx.BITMAP_TYPE_PNG)
00057     self._plug_bitmap = wx.Bitmap(path.join(icons_path, "battery-charging.png"), wx.BITMAP_TYPE_PNG)
00058     self._background_bitmap = wx.Bitmap(path.join(icons_path, "battery-background.png"), wx.BITMAP_TYPE_PNG)
00059     self._green = wx.Bitmap(path.join(icons_path, "battery-green-bar.png"), wx.BITMAP_TYPE_PNG)
00060     self._yellow = wx.Bitmap(path.join(icons_path, "battery-yellow-bar.png"), wx.BITMAP_TYPE_PNG)
00061     self._red = wx.Bitmap(path.join(icons_path, "battery-red-bar.png"), wx.BITMAP_TYPE_PNG)
00062 
00063     self.SetSize(wx.Size(self._left_bitmap.GetWidth() + self._right_bitmap.GetWidth() + self._background_bitmap.GetWidth(), 50))
00064 
00065     self._start_x = self._left_bitmap.GetWidth()
00066     self._end_x = self.GetSize().x - self._right_bitmap.GetWidth()
00067     self._width = self._end_x - self._start_x
00068 
00069     self._plugged_in = False
00070 
00071     self.Bind(wx.EVT_PAINT, self.on_paint)
00072 
00073   def on_paint(self, evt):
00074     dc = wx.BufferedPaintDC(self)
00075 
00076     dc.SetBackground(wx.Brush(self.GetBackgroundColour()))
00077     dc.Clear()
00078 
00079     w = self.GetSize().GetWidth()
00080     h = self._left_bitmap.GetHeight()
00081 
00082     color_bitmap = None
00083     if (self._pct > 0.5):
00084       color_bitmap = self._green
00085     elif (self._pct > 0.3):
00086       color_bitmap = self._yellow
00087     else:
00088       color_bitmap = self._red
00089 
00090     dc.DrawBitmap(self._background_bitmap, self._start_x, 0, True)
00091 
00092     color_image = color_bitmap.ConvertToImage()
00093     scaled_color_image = color_image.Rescale(round(self._width * self._pct), color_bitmap.GetHeight())
00094     color_bitmap = wx.BitmapFromImage(scaled_color_image)
00095     dc.DrawBitmap(color_bitmap, self._start_x, 0, True)
00096     dc.DrawBitmap(self._left_bitmap, 0, 0, True)
00097     dc.DrawBitmap(self._right_bitmap, self._end_x, 0, True)
00098 
00099     if (self._plugged_in):
00100       dc.DrawBitmap(self._plug_bitmap,
00101                     (self._start_x + self._width) / 2.0 - (self._plug_bitmap.GetWidth() / 2.0), 10)
00102 
00103     fnt = dc.GetFont()
00104     fnt.SetPointSize(7)
00105     dc.SetFont(fnt)
00106     dc.DrawText("PWR Cons.", 0, 32)
00107     dc.DrawText('%1.3f W' % self._power_consumption, 60, 32)
00108 
00109 
00110   def set_power_state(self, msg):
00111     last_pct = self._pct
00112     last_plugged_in = self._plugged_in
00113     last_time_remaining = self._time_remaining
00114 
00115     self._current = float(msg['Current (A)'])
00116     self._power_consumption = float(msg['Current (A)'])*float(msg['Voltage (V)'])
00117     self._time_remaining = 0.9*self._time_remaining + 0.1*(float(msg['Charge (Ah)'])/non_zero(float(msg['Current (A)'])))*60.0
00118     self._pct = float(msg['Charge (Ah)'])/float(msg['Capacity (Ah)'])
00119     self._plugged_in = (float(msg['Current (A)'])>0)
00120 
00121     if (last_pct != self._pct or last_plugged_in != self._plugged_in or last_time_remaining != self._time_remaining):
00122         drain_str = "remaining"
00123         if (self._plugged_in):
00124             drain_str = "to full charge"
00125         self.SetToolTip(wx.ToolTip("Battery: %.2f%% (%d minutes %s)"%(self._pct * 100.0, abs(self._time_remaining), drain_str)))
00126     self.Refresh()
00127 
00128   def set_stale(self):
00129     self._current = 0.0
00130     self._plugged_in = 0
00131     self._pct = 0
00132     self._time_remaining = 0.0
00133     self._power_consumption = 0
00134     self.SetToolTip(wx.ToolTip("Battery: Stale"))
00135 
00136     self.Refresh()
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elektron_dashboard
Author(s): Maciej StefaƄczyk
autogenerated on Thu Nov 14 2013 11:57:53