PowerManager/PowerManager.cpp
author StephaneLenclud
Fri, 25 Sep 2015 19:25:35 +0200
changeset 162 15aa52fe5795
parent 160 de942d321cfb
permissions -rw-r--r--
Upgrade LibMiniDisplay package to v1.1.7.
Removing MiniDisplay DLL again.
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// This is the main DLL file.
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#include "stdafx.h"
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#include "PowerManager.h"
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using namespace System::Diagnostics;
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namespace PowerManager
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{
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    ///
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    SettingNotifier::SettingNotifier(IntPtr aHandle, Boolean aService)
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    {
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        Construct(aHandle, aService);
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    }
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    ///
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    SettingNotifier::SettingNotifier(IntPtr aHandle)
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    {
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        //By default we assume we run as a Window
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        Construct(aHandle, false);
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    }
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    ///
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    void SettingNotifier::Construct(IntPtr aHandle, Boolean aService)
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    {
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        iHandle = aHandle;
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        iIsService = aService;
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        iMonitorPowerOnDelegate = nullptr;
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        iMonitorPowerOffDelegate = nullptr;
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        iMonitorPowerObserverCount = 0;
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        iMonitorPowerHandle = NULL;
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    }
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    ///
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    HPOWERNOTIFY SettingNotifier::RegisterPowerSettingNotification(LPCGUID aGuid)
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	{
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        HANDLE handle = iHandle.ToPointer();
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        return ::RegisterPowerSettingNotification(handle, aGuid, (iIsService?DEVICE_NOTIFY_SERVICE_HANDLE:DEVICE_NOTIFY_WINDOW_HANDLE));
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	}
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    ///
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    void SettingNotifier::WndProc(Message% aMessage)
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    {
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        POWERBROADCAST_SETTING* setting;
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        if (aMessage.Msg == WM_POWERBROADCAST && aMessage.WParam.ToInt32() == PBT_POWERSETTINGCHANGE)
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        {
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            setting=(POWERBROADCAST_SETTING*)aMessage.LParam.ToPointer();
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            if (setting->PowerSetting == GUID_MONITOR_POWER_ON)
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            {
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                if (setting->Data[0] == 0x0)
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                {
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                    Debug::WriteLine(L"POWERBROADCAST: Monitor Power Off");
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                    OnMonitorPowerOff();
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                }
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                else if (setting->Data[0] == 0x1)
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                {
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                    Debug::WriteLine(L"POWERBROADCAST: Monitor Power On");
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                    OnMonitorPowerOn();
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                }
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            }
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        }
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    }
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    ///
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    void SettingNotifier::OnMonitorPowerOn::add(PowerManagerDelegate^ d)
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    {
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        iMonitorPowerOnDelegate += d;
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        iMonitorPowerObserverCount++;
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        //iMonitorPowerOnDelegate->GetInvocationList()->GetLength(0)
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        if (iMonitorPowerObserverCount == 1)
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        {
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            //Register for monitor power notifications
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            iMonitorPowerHandle=RegisterPowerSettingNotification(&GUID_MONITOR_POWER_ON);
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        }
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    }
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    ///
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    void SettingNotifier::OnMonitorPowerOn::remove(PowerManagerDelegate^ d)
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    {
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        iMonitorPowerOnDelegate -= d;
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        iMonitorPowerObserverCount--;
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        if (iMonitorPowerObserverCount==0)
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        {
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            //Unregister from corresponding power setting notification
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            UnregisterPowerSettingNotification(iMonitorPowerHandle);
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        }
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    }
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    //
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    void SettingNotifier::OnMonitorPowerOn::raise()
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    {        
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        if (iMonitorPowerOnDelegate != nullptr)
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        {
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            iMonitorPowerOnDelegate->Invoke();
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        }
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    }
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    ///
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    void SettingNotifier::OnMonitorPowerOff::add(PowerManagerDelegate^ d)
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    {
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        iMonitorPowerOffDelegate += d;
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        iMonitorPowerObserverCount++;
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        if (iMonitorPowerObserverCount == 1)
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        {
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            //Register for monitor power notifications
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            iMonitorPowerHandle = RegisterPowerSettingNotification(&GUID_MONITOR_POWER_ON);
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        }
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    }
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    ///
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    void SettingNotifier::OnMonitorPowerOff::remove(PowerManagerDelegate^ d)
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    {
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        iMonitorPowerOffDelegate -= d;
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        iMonitorPowerObserverCount--;
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        if (iMonitorPowerObserverCount == 0)
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        {
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            //Unregister from corresponding power setting notification
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            UnregisterPowerSettingNotification(iMonitorPowerHandle);
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        }
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    }
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    //
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    void SettingNotifier::OnMonitorPowerOff::raise()
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    {
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        if (iMonitorPowerOffDelegate != nullptr)
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        {
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            iMonitorPowerOffDelegate->Invoke();
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        }        
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    }
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}