/// <summary>
/// Retrieve the ISearchResult which will be played when the "play" toolbar button or context menu entry
/// is clicked.
/// Usually this is the first selected entry in the list.
/// </summary>
/// <returns></returns>
public ISearchResult GetSelectedPlaybackCandidate()
{
SearchResultListItem item = GetSelectedItems().FirstOrDefault();
if (item != null)
{
return(item.SearchResult);
}
else
{
return(null);
}
}
/// <summary>
/// Update the information panel (below the results list) based on the currently selected entries
/// </summary>
public void UpdateInformationPanel()
{
Action action = new Action(() => {
IEnumerable <SearchResultListItem> selectedItems = GetSelectedItems();
int count = resultsListView.SelectedIndices.Count;
if (count > 1)
{
// multiple elements selected
// show either an appropriate message ("Multiple entries selected") or common info in the info box
informationBox.Text = StringResources.PleaseSelectASingleItemToSeeMoreInfo;
}
else if (count == 1 && selectedItems.First().SearchResult != null)
{
// Just a single element has been selected
string msg = "";
SearchResultListItem item = selectedItems.First();
msg += String.Format(StringResources.Length, (DateTime.Today + item.SearchResult.Duration).ToString("HH::mm::ss.fff"));
if (item.SearchResult.ResultType == AudioSearchResultType.MusicFile)
{
if (item.SearchResult.Tags != null && item.SearchResult.Tags.Count > 0)
{
msg += Environment.NewLine + StringResources.Tags + item.SearchResult.Tags.Aggregate((s1, s2) =>
{
return(s1 + ";" + s2);
});
}
else
{
msg += Environment.NewLine + StringResources.NoTags;
}
}
informationBox.Text = msg;
}
else if (count < 1)
{
// no elements selected
informationBox.Text = "";
}
});
if (InvokeRequired)
{
Invoke(action);
}
else
{
action.Invoke();
}
}
/// <summary>
/// Determine the AudioSearchResultType of the given selected items.
/// The first item's AudioSearchResultType is assumed to apply to all items, but
/// this is verified and an InvalidOperationException is thrown if any item in the
/// list has a different AudioSearchResultType than the first one.
/// </summary>
/// <param name="selectedItems"></param>
/// <returns></returns>
private static AudioSearchResultType FindAndVerifySelectedAudioType(IEnumerable <SearchResultListItem> selectedItems)
{
// Determine the overall AudioType from the first selected item
SearchResultListItem firstItem = selectedItems.First();
AudioSearchResultType overallItemAudioType = firstItem.ItemAudioType;
// Make sure all other items' AudioTypes are compatible (the same)
foreach (SearchResultListItem item in selectedItems)
{
if (item.ItemAudioType != overallItemAudioType)
{
// Show a message to the user that he should only select items of the same type?
throw new InvalidOperationException(StringResources.PleaseSelectOnlyEntriesOfTheSameType);
}
}
return(overallItemAudioType);
}
