// On Vista or 7 we could use SHIL_JUMBO to get a 256x256 icon,
// but we'll use SHCreateItemFromParsingName as it'll give an identical
// icon to the one shown in explorer and it scales automatically.
bool WinIconProvider::addIconFromShellFactory(QString filePath, QIcon& icon) const
{
HRESULT hr = S_FALSE;
if (fnSHCreateItemFromParsingName)
{
IShellItem* psi = NULL;
hr = fnSHCreateItemFromParsingName((PCWSTR)filePath.utf16(), 0, IID_IShellItem, (void**)&psi);
if (hr == S_OK)
{
IShellItemImageFactory* psiif = NULL;
hr = psi->QueryInterface(IID_IShellItemImageFactory, (void**)&psiif);
if (hr == S_OK)
{
HBITMAP iconBitmap = NULL;
SIZE iconSize = {preferredSize, preferredSize};
hr = psiif->GetImage(iconSize, SIIGBF_RESIZETOFIT | SIIGBF_ICONONLY, &iconBitmap);
if (hr == S_OK)
{
QPixmap iconPixmap = QtWin::fromHBITMAP(iconBitmap);
icon.addPixmap(iconPixmap);
DeleteObject(iconBitmap);
}
psiif->Release();
}
psi->Release();
}
}
return hr == S_OK;
}
//------------------------------------------------------------------------------
// CDeviceContextMenu::Invoke
//
// Invoke the context menu item.
//------------------------------------------------------------------------------
IFACEMETHODIMP CDeviceContextMenu::Invoke(
__in IShellItemArray* psiItemArray,
__in IBindCtx* pbc
)
{
UNREFERENCED_PARAMETER( pbc );
HRESULT hr = S_OK;
IShellItem* pShellItem = NULL;
IShellItem2* pShellItem2 = NULL;
LPWSTR pszHardwareID = NULL;
PROPVARIANT pv = {0};
PWSTR pszName = NULL;
if( NULL == psiItemArray )
{
return E_INVALIDARG;
}
PropVariantInit( &pv );
//
// The selected device is the only shell item in the shell item array.
// Use GetItemAt with index 0 to get the shell item corresponding to the
// selected device.
//
if( S_OK == hr )
{
hr = psiItemArray->GetItemAt( 0, &pShellItem );
}
//
// Get the IShellItem2 interface of the shell item, so we can
// access its properties from the shell item directly or from
// the devnode(s) of the device.
//
if( S_OK == hr )
{
hr = pShellItem->QueryInterface(
__uuidof(pShellItem2),
reinterpret_cast<void**>(&pShellItem2)
);
}
//
// Here you might take a look at the saved m_pszCommandName to
// decide what actions to take and what application to end up
// launching.
//
//
// Get device's properties directly from the shell item object. In
// this case we'll get the name.
//
if( S_OK == hr )
{
hr = pShellItem2->GetProperty( PKEY_ItemNameDisplay, &pv );
}
if( S_OK == hr &&
VT_LPWSTR == pv.vt )
{
hr = SHStrDup( pv.pwszVal, &pszName );
}
//
// Get device's properties from the devnode(s) of the device.
// We get one of the device's hardware ids in this sample.
//
if( S_OK == hr )
{
// ignore the failure because we don't use this information
// in this sample.
GetDeviceHardwareID( pShellItem2, &pszHardwareID );
}
//
// Launch a thread to show a message box with one of the properties
// we grabbed. This section of code would be replaced with code to
// launch an relevant device related application based on
// contextual information from the properties (if needed).
//
// A separate thread is used here to avoid blocking the main UI
// thread while the message box exists.
//
if( S_OK == hr )
{
CreateThread( NULL, 0, _ExecuteThreadProc, pszName, 0, NULL );
}
//
// Clean up
//
if( NULL != pShellItem )
{
pShellItem->Release();
}
if( NULL != pShellItem2 )
{
pShellItem2->Release();
}
if( NULL != pszHardwareID )
{
CoTaskMemFree( pszHardwareID );
}
PropVariantClear( &pv );
return hr;
} // CDeviceContextMenu::Invoke
