public bool ChangePosDown_CanExecute(object parameter)
{
try
{
if (_selectedItem == null)
{
return(false);
}
if (_selectedItem is Chapter)
{
Chapter selectedChapter = _selectedItem as Chapter;
if (Chapters.IndexOf(selectedChapter) == Chapters.Count - 1)
{
return(false);
}
return(true);
}
if (_selectedItem is Part)
{
Part selectedPart = _selectedItem as Part;
List <Part> parts = Part.LoadPartListForChapter(selectedPart.ChapterID);
if (selectedPart.OrderNumber == parts.Count)
{
return(false);
}
return(true);
}
return(true);
}
catch (Exception ex)
{
MessageBox.Show($"Критическая ошибка: {ex.Message}");
return(false);
}
}
private int LookUp(string groupName)
{
foreach (var group in Chapters)
{
if (group.GroupName == groupName)
{
return(Chapters.IndexOf(group));
}
}
throw new ArgumentOutOfRangeException();
}
private void ChangePosDown(object parameter)
{
if (_selectedItem is Chapter)
{
Chapter selectedChapter = _selectedItem as Chapter;
int indexOfSwappingItem = Chapters.IndexOf(selectedChapter) + 1;
Chapter swapingChapter = Chapters[indexOfSwappingItem] as Chapter;
int temp = selectedChapter.OrderNumber;
selectedChapter.OrderNumber = swapingChapter.OrderNumber;
swapingChapter.OrderNumber = temp;
Chapter.SaveChangesInXML(selectedChapter);
Chapter.SaveChangesInXML(swapingChapter);
OnPropertyChanged("Chapters");
}
else if (_selectedItem is Part)
{
Part selectedPart = _selectedItem as Part;
List <Part> parts = Part.LoadPartListForChapter(selectedPart.ChapterID);
Part swapingPart = (from p in parts
where p.OrderNumber == selectedPart.OrderNumber + 1
select p).First();
int temp = selectedPart.OrderNumber;
selectedPart.OrderNumber = swapingPart.OrderNumber;
swapingPart.OrderNumber = temp;
Part.SaveChangesInXML(selectedPart);
Part.SaveChangesInXML(swapingPart);
OnPropertyChanged("Chapters");
}
}
public string ChapterId(Chapter chapter) =>
$"{PartNumber}.{Chapters?.IndexOf(chapter)+1}";