taskbarprogress.cpp

// http://stackoverflow.com/questions/15001638/windows-7-taskbar-state-with-minimal-code

#include "taskbarprogress.h"

Win7TaskbarProgress::Win7TaskbarProgress()
{
    m_pITaskBarList3 = NULL;
    m_bFailed = false;
}

Win7TaskbarProgress::~Win7TaskbarProgress()
{
    if (m_pITaskBarList3)   
    {
        m_pITaskBarList3->Release();
        CoUninitialize();
    }
}

void Win7TaskbarProgress::SetProgressState( HWND hwnd, TBPFLAG flag )
{
    if (Init())
        m_pITaskBarList3->SetProgressState(hwnd, flag);
}

void Win7TaskbarProgress::SetProgressValue( HWND hwnd, ULONGLONG ullCompleted, ULONGLONG ullTotal )
{
    if (Init())
        m_pITaskBarList3->SetProgressValue(hwnd, ullCompleted, ullTotal);
}

bool Win7TaskbarProgress::Init()
{
    if (m_pITaskBarList3)
        return true;

    if (m_bFailed)
        return false;

    // Initialize COM for this thread...
    CoInitialize(NULL);

    CoCreateInstance(CLSID_TaskbarList, NULL, CLSCTX_INPROC_SERVER, IID_ITaskbarList3, (void **)&m_pITaskBarList3);

    if (m_pITaskBarList3)
        return true;

    m_bFailed = true;
    CoUninitialize();
    return false;
}