Intel Mobile SDK Power and Observer query

[conrad67]

Hi fellas, i was hoping somebody could help me out.

I am using the Intel Mobile SDK 1.2 in order to access powerevents when the power is connected and disconnected.

Currently i have the events registering and a message box poping up when this happens, but i want to be able to log the events to a text box on my windows form, also i want to be able to re-size a picture when the power is disconnected, and then make it larger when power is connected again (power saving)but i cannot do either of these, it just seems to be the message box that pops up. I am using C#

Any ideas as to why this is not working for me, i have access to everything when the form.

here is my code:

thanks fellas,

PS my form is [MTATHREAD]

using

System;

using

System.Collections.Generic;

using

System.ComponentModel;

using

System.Data;

using

System.Drawing;

using

System.Text;

using

System.Windows.Forms;

using

System.Threading;

using

Intel.Mobile.Base;

using

Intel.Mobile.Battery;

using

Intel.Mobile.Context;

namespace

PowerExample

{

public partial class Form2 : Form

{

ContextClass myClass = new ContextClass(); public PowerInstance myInstance; internal static bool LoopFlag = true; internal static readonly System.Object Mutex = new System.Object(); private DelegateObserver.ObserverNotifyDelegate DisconnectNotifyDelegate = null;

public Form2()

{

InitializeComponent();

myInstance = (

PowerInstance)

myClass.GetInstance(

"Power"); DelegateObserver.ObserverNotifyDelegate del = new DelegateObserver.ObserverNotifyDelegate(ConnectedEventHandler); Observer connectedChangeObsvr = new DelegateObserver(del);

myInstance.ExternallyPowered.AddObserver(connectedChangeObsvr);

myInstance.InternallyPowered.AddObserver(connectedChangeObsvr);

}

private void ConnectedEventHandler(Event eEvent)

{

try

{

if (eEvent.GetType() == EventBase.EventType.eExternallyPowered)

{

//textBox1.AppendText("Connected 1 " + DateTime.Now); MessageBox.Show("Ac Adapter Connectd"); //textBox1.AppendText("Conneted 2 " + DateTime.Now);

}

if(eEvent.GetType() == EventBase.EventType.eInternallyPowered)

{

//textBox1.AppendText("Disconnect 1 " + DateTime.Now); MessageBox.Show("Ac Adapter Disconnected"); //textBox1.AppendText("Disconnect 2 " + DateTime.Now);

}

}

catch (IntelMobileException ex)

{

textBox1.Text = (ex.ToString());

}

catch (Exception e)

{

textBox1.Text = (

"------------ Exception Occurred ------------");

textBox1.Text = (

"Message: " + e.Message);

textBox1.Text = (

"Source: " + e.Source);

textBox1.Text = (

"Target Site: " + e.TargetSite);

}

}

}

internal class DelegateObserver : Observer

{

public delegate void ObserverNotifyDelegate(Event eEvent); public DelegateObserver(ObserverNotifyDelegate Notifydelegate)

{

this.MyNotifydelegate = Notifydelegate;

}

public override void Notify(Event ev)

{

this.MyNotifydelegate(ev);

}

private ObserverNotifyDelegate MyNotifydelegate;

}

}

[Bin_Z_Intel]

Hi, I have reproduced your problem. Because the event notification is a separate thread, it seems in a new thread that can't directlyinteract with the control created by the main thread. Just like creating a new thread and you will meet the same problem.

I will investigate more and get you later for the solution in such case.

[conrad67]

thanks for getting back to me with that friend, id be reallly greatful if you could sort of a soultion for me or point me in the rigth direction to sort it myself as i have never used threading before.

thanks again for your help and i look forward to hearing from you again

[Bin_Z_Intel]

Hi, this is about Multitheaded Windows Forms Control as you are using event notification in MPSDK. MSDN has the detail ms-help://MS.MSDNQTR.2005JAN.1033/cpguide/html/cpco
nDevelopingMultithreadedWindowsFormsControl.htm

Hereis the samplesolution (part of code)in your case, to add one delegate and marshal the calling to Windows control in multi-threading. Please note the string is passed instead of event object during marshalling.

public partial class Form2 : Form
{
...
delegate void LogDelegate(string str);
LogDelegate logHandler;

public Form2()
{
logHandler = new LogDelegate(LogEvent);
...
}

private void ConnectedEventHandler(Event eEvent)
{
try
{
if (eEvent.GetType() == EventBase.EventType.eExternallyPowered)
{
this.BeginInvoke(logHandler, new object[] { "Connected" });
}
if (eEvent.GetType() == EventBase.EventType.eInternallyPowered)
{
this.BeginInvoke(logHandler, new object[] { "Disconnected" });
}
}
catch (IntelMobileException ex)
{
...
}
catch (Exception e)
{
...
}
}

private void LogEvent(string acType)
{
tex tBox1.AppendText(acType + " " + DateTime.Now);
}
}

[conrad67]

worked perferct my friend thank you very much

i have one additionl query for you if you do not mind

i would like to add in windows media player into my app but it will only allow to play in single thread apps, is there any way round this?

many thanks

[conrad67]

worked perferct my friend thank you very much

i have one additionl query for you if you do not mind

i would like to add in windows media player into my app but it will only allow to play in single thread apps, is there any way round this?

many thanks

[Bin_Z_Intel]

Hi, I don't know how Windows Media Player works here. If you wantto get events asynchronously in MPSDK, it only supports multi-thread applications.

You can consider inter-process communication for your single thread app.

-Bin