private void OnDataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
{
ItemsSource = e.NewValue as FileCollectionBase;
if (ItemsSource != null)
{
itemAdd.CommandParameter = new ItemParams(ObjectType.File, ItemsSource.OwnerId);
}
}
void cmd_SetNewSource(object sender, SetNewSourceEventArgs e)
{
if (e.NewSource == null)
{
return;
}
Source = e.NewSource;
preferred_focus_name = e.PreferredFocusText;
if (e.ForceRefillLater)
{
Source.Refill();
}
else
{
//update without refill
inner_ListControl.UpdateEnable = false;
//we need update FocusedIndex
if (e.NewSource.ItemCount == 0)
{
inner_ListControl.FocusedIndex = -1;
}
else
{
//preferred_focus_name we set upper
if (preferred_focus_name == string.Empty)
{
inner_ListControl.FocusedIndex = 0;
}
else
{
var preferred_focus = Source.FindIndexOfName(preferred_focus_name);
if (preferred_focus == -1)
{
inner_ListControl.FocusedIndex = 0;
}
else
{
inner_ListControl.FocusedIndex = preferred_focus;
}
}
}
inner_ListControl.UpdateEnable = true;
inner_ListControl.UpdateAllItems(true);
inner_InfoPanel.RefreshSafe();
inner_ListControl.ScrollToFocusVisible();
OnStatusTextChanged();
}
}
void internal_source_AfterRefill(object sender, EventArgs e)
{
inner_ListControl.UpdateEnable = false;
//we need update FocusedIndex
FileCollectionBase src = (FileCollectionBase)sender;
if (src.ItemCount == 0)
{
inner_ListControl.FocusedIndex = -1;
}
else
{
//preferred_focus_name we get at GetChildCollection call
if (preferred_focus_name == string.Empty)
{
inner_ListControl.FocusedIndex = 0;
// need DEBUG
// иначе при запуске программы курсор получается за пределами окна
inner_ListControl.ScrollToFocusVisible();
//
}
else
{
int preferred_focus = src.FindIndexOfName(preferred_focus_name);
if (preferred_focus == -1)
{
inner_ListControl.FocusedIndex = 0;
}
else
{
inner_ListControl.FocusedIndex = preferred_focus;
}
}
}
//added later
inner_ListControl.ClearSelection();
inner_ListControl.UpdateEnable = true;
inner_ListControl.UpdateAllItems(true);
inner_InfoPanel.RefreshSafe();
inner_ListControl.ScrollToFocusVisible();
OnStatusTextChanged();
}
private bool action_enter()
{
if (Source == null)
{
return(true);
}
//if not container, do default action of Source
if (!Source.GetItemIsContainer(inner_ListControl.FocusedIndex))
{
Source.DefautlAction(FocusedIndex, false);
return(true);
}
//try to get child collection
//FileCollectionBase new_source = Source.GetChildCollection(inner_ListControl.FocusedIndex,ref preferred_focus_name);
inner_ListControl.ClearSelection(false);
FileCollectionBase new_source = null;
var use_new = false;
Source.GetChildCollection(inner_ListControl.FocusedIndex, ref new_source, ref use_new, ref preferred_focus_name);
if (use_new)
{
//refilling MUST be already done in GetChildCollection
//source completely new
if (new_source == null)
{
return(false);
}
//change Source
Source = new_source;
internal_source_AfterRefill(Source, new EventArgs());
}
//if use_new==false
//Refill() must be call from FileCollectionBase
//Source.Refill();
//return true - supress subsequent key processing
return(true);
}
