How to respond on power failure?

[waveking]

Hi,
I am using USB UIRT to control my VLC player using EventGhost on my laptop.

I need that when my laptop goes into battery mode from Ac mode, then eventghost should pause VLC player, if it is running.
How can i achieve this?

[stottle]

I don't run from a laptop. I know EG posts several power messages, like idle/unidle. Does it generate any messages for switching the power mode? If so, just attach action to that event. Otherwise, it would be necessary to change the power plugin code to add that event....

Brett

[krambriw]

Currently you only get "POWERSTATUSCHANGE" events when switching between battery/line back and forth

To find out if running on batteries (or mains) a plugin or eg itself would need to dig "deeper" calling GetSystemPowerStatus and checking the SYSTEM_POWER_STATUS structure

Code: Select all

typedef struct _SYSTEM_POWER_STATUS {
  BYTE  ACLineStatus;
  BYTE  BatteryFlag;
  BYTE  BatteryLifePercent;
  BYTE  Reserved1;
  DWORD BatteryLifeTime;
  DWORD BatteryFullLifeTime;
} SYSTEM_POWER_STATUS, *LPSYSTEM_POWER_STATUS;

[krambriw]

I just elaborated a bit and found that this simple script will generate an event when changing from AC to Battery and vice versa. Below is also a picture showing my configuration. You just have to create a macro with a python script and copy the code below. Then you add the system event "System.PowerStatusChange" as I did

You can then use the "Main.Energy.Source.Battery" event to control another macro to pause VLC

Best regards, Walter

Code: Select all

import ctypes
import ctypes.wintypes

class SYSTEM_POWER_STATUS(ctypes.Structure):
   _fields_ = [("ACLineStatus", ctypes.c_byte), ("BatteryFlag", ctypes.c_byte), ("BatteryLifePercent", ctypes.c_byte), ("Reserved1", ctypes.c_byte), ("BatteryLifeTime", ctypes.wintypes.DWORD), ("BatteryFullLiveTime", ctypes.wintypes.DWORD)]

sps = SYSTEM_POWER_STATUS()
ctypes.windll.kernel32.GetSystemPowerStatus(ctypes.byref(sps))

status_constants = ["", "High", "Low", "Critical", "Charging", "No system battery", "Unknown"]
ac_constants = ["Battery", "AC Power", "Unknown"]
hours, rest = divmod(sps.BatteryLifeTime , 3600)
minutes, seconds = divmod(rest, 60)

#print "Battery charge status:", status_constants[sps.BatteryFlag]
#print "Energy source:", ac_constants[sps.ACLineStatus]
#print "Battery life percentage: %s%%" % sps.BatteryLifePercent
#print "Estimated remaining time: %s:%s:%s" % (hours, minutes, seconds)

eg.TriggerEvent("Energy.Source."+ac_constants[sps.ACLineStatus])