/// <summary>
/// Exchange the spots of pinned items <paramref name="item1"/>
/// and <paramref name="item2"/> via exchange of IsPinned values
/// and direct add/remove in viewmodel collection.
/// </summary>
/// <param name="item1"></param>
/// <param name="item2"></param>
/// <returns></returns>
private bool ExchangePinnedSpots(IMRUEntryViewModel item1
, IMRUEntryViewModel item2)
{
if (item1 != null && item2 != null)
{
if (item1.IsPinned == 0 || item2.IsPinned == 0)
{
return(false);
}
this.Entries.Remove(item2.PathFileName);
this.Entries.Remove(item1.PathFileName);
var isPinnedBack = item1.IsPinned;
item1.SetIsPinned(item2.IsPinned);
item2.SetIsPinned(isPinnedBack);
this.Entries.Add(item2.PathFileName, item2);
this.Entries.Add(item1.PathFileName, item1);
return(true);
}
return(false);
}
/// <summary>
/// Negates the pin entry state for a given mru list entry.
/// </summary>
/// <param name="val"></param>
private void PinUnpinEntry(IMRUEntryViewModel val)
{
var newIsPinnedValue = (val.IsPinned == 0 ? _NextIsPinnedValue : 0);
var oldIsPinnedValue = val.IsPinned;
val.SetIsPinned(newIsPinnedValue);
if (newIsPinnedValue != 0) // Increment next IsPinned order entry
{
_NextIsPinnedValue += 1; // If this entry is a newly pinned enty
// Update all entries if this entry is the first entry to be pinned
if (_NextIsPinnedValue == 2 && Entries.Count > 0)
{
List <IMRUEntryViewModel> values = new List <IMRUEntryViewModel>();
foreach (var item in Entries.Values)
{
values.Add(item);
}
foreach (var item in values)
{
UpdateEntry(item);
}
}
}
else
{
DecrementPinnedValues(oldIsPinnedValue);
}
}
/// <summary>
/// Pin or unpines an entry depending on the <paramref name="isPinned"/> parameter.
/// </summary>
/// <param name="val"></param>
/// <param name="isPinned"></param>
private void PinUnpinEntry(IMRUEntryViewModel val, bool isPinned)
{
var oldIsPinnedValue = val.IsPinned;
if (isPinned == true)
{
var newIsPinnedValue = _NextIsPinnedValue;
val.SetIsPinned(newIsPinnedValue);
// Increment next IsPinned order entry
_NextIsPinnedValue += 1; // since this entry is a newly pinned enty
}
else
{
val.SetIsPinned(0);
DecrementPinnedValues(oldIsPinnedValue);
}
}
/// <summary>
/// Method should be called on application start-up to read MRU
/// data from persisted session object into its associated viewmodel.
/// </summary>
/// <param name="sessionData"></param>
public void ReadMruFromSession(IProfile sessionData)
{
try // Read back MRU data information
{
List.Entries.Clear();
foreach (var item in sessionData.LastActiveSourceFiles)
{
IMRUEntryViewModel mruItem =
MRULib.MRU_Service.Create_Entry(item.path,
item.LastTimeOfEdit);
mruItem.SetIsPinned(item.IsPinned);
List.UpdateEntry(mruItem);
}
}
catch
{
}
}