//private bool IsValidDropTarget(UIElement target)
//{
// if (target == null) return false;
// var targetTreeViewItem = GetNearestContainer(target);
// if (targetTreeViewItem == null) return false;
// var targetBookItem = targetTreeViewItem.Header as BookItem;
// if (targetBookItem == null) return false;
// return IsValidDropTarget(targetBookItem, _sourceItem);
//}
private bool IsValidDropTarget(BookItem target, int relative /*, BookItem dragging*/)
{
var dragging = _sourceItem;
switch (target.Type)
{
// cannot drop onto recents
case BookItemType.Recents:
case BookItemType.Recent:
return(false);
case BookItemType.Solution:
// always, whatever the value of relative
return(target != dragging && !IsDescendant(target, dragging) && !IsCloseSibling(target, dragging, relative));
case BookItemType.Folder:
if (target == dragging || IsDescendant(target, dragging))
{
return(false);
}
if (target == dragging.Parent)
{
return(relative < 0); // not ON parent but before
}
return(true);
//return target != dragging && target != dragging.Parent && !IsDescendant(target, dragging);
}
return(false);
}
/// <summary>
/// Clone a book item under a new parent and with a new type.
/// </summary>
/// <param name="newParent">The new parent item.</param>
/// <param name="newType">The new type.</param>
/// <returns>The cloned book item.</returns>
/// <remarks>
/// <para>The cloned item shares its <see cref="Items"/> collection with the source item.</para>
/// <para>The cloned item is *not* added to the new parent.</para>
/// </remarks>
public BookItem Clone(BookItem newParent, BookItemType newType)
{
return(new BookItem(newParent, newType, Path, Items)
{
Header = Header
});
}
public IEnumerable <BookItem> GetAll()
{
var recentItems = RecentSource.GetRecents();
var settingItems = ItemSource.Load();
var root = new List <BookItem>();
var recentFolder = new BookItem(null, BookItemType.Recents)
{
Header = "Recent"
};
root.Add(recentFolder);
foreach (var item in recentItems)
{
// fixme test availability?
var solutionName = Path.GetFileNameWithoutExtension(item.Path);
recentFolder.Items.Add(new BookItem(recentFolder, BookItemType.Recent, item.Path)
{
Header = solutionName
});
}
foreach (var item in settingItems)
{
root.Add(item);
}
return(root);
}
/// <summary>
/// Gets the items from the settings.
/// </summary>
public IList <BookItem> Load()
{
var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "SolutionBook.settings");
if (!File.Exists(path))
{
return(new List <BookItem>());
}
void Read(IEnumerable <XElement> elements, ICollection <BookItem> items, BookItem parent)
{
foreach (var element in elements)
{
if (element.Name == "Solution")
{
items.Add(new BookItem(parent, BookItemType.Solution, element.Attribute("path").Value)
{
Header = element.Attribute("name").Value
});
}
else
{
var folder = new BookItem(parent, BookItemType.Folder)
{
Header = element.Attribute("name").Value
};
items.Add(folder);
Read(element.Elements(), folder.Items, folder);
}
}
}
XDocument document = null;
var attempts = 0;
while (document == null && attempts++ < 8)
{
try
{
using (var stream = File.Open(path, FileMode.Open, FileAccess.Read, FileShare.None))
{
document = XDocument.Load(stream);
}
}
catch
{
Thread.Sleep(250);
}
}
var settingItems = new List <BookItem>();
if (document != null)
{
Read(document.Root.Elements(), settingItems, null);
}
return(settingItems);
}
/// <summary>
/// Initializes a new instance of the <see cref="BookItem"/> class with a parent item.
/// </summary>
/// <param name="parent">A parent item, or <c>null</c> for root items.</param>
/// <param name="type">The book item type.</param>
/// <param name="path">The path of the solution.</param>
/// <param name="items">The child items.</param>
private BookItem(BookItem parent, BookItemType type, string path, ObservableCollection <BookItem> items)
{
Items = items;
Parent = parent;
Type = type;
Path = path;
}
private void DoDrop(DragDropEffects effect)
{
if (_targetItem == null)
{
return;
}
if (effect == DragDropEffects.Move)
{
if (_sourceItem.Parent == null)
{
Book.Items.Remove(_sourceItem);
}
else
{
_sourceItem.Parent.Items.Remove(_sourceItem);
}
}
int targetIndex = _targetItem.Parent == null
? Book.Items.IndexOf(_targetItem)
: _targetItem.Parent.Items.IndexOf(_targetItem);
if (effect == DragDropEffects.Move || effect == DragDropEffects.Copy)
{
var newType = _sourceItem.Type == BookItemType.Recent ? BookItemType.Solution : _sourceItem.Type;
var newParent = _targetRelative == 0 ? _targetItem : _targetItem.Parent;
var newItem = _sourceItem.Clone(newParent, newType);
if (_targetRelative == 0)
{
newParent.Items.Add(newItem);
}
else
{
if (_targetRelative > 0)
{
targetIndex += 1;
}
if (newParent == null)
{
Book.Items.Insert(targetIndex, newItem);
}
else
{
newParent.Items.Insert(targetIndex, newItem);
}
}
}
_targetItem = null;
_targetRelative = 0;
_sourceItem = null;
//Save();
}
private bool CanBeDragged(BookItem bookItem)
{
if (bookItem == null)
{
return(false);
}
// that one does not move
return(bookItem.Type != BookItemType.Recents);
}
private bool IsDescendant(BookItem item, BookItem parent)
{
while (item != null)
{
if (item.Parent == parent)
{
return(true);
}
item = item.Parent;
}
return(false);
}
private void EndEdit(string value = null)
{
if (_editItem == null)
{
return;
}
_editItem.Header = string.IsNullOrWhiteSpace(value) ? _editOrigin : value;
_editItem.IsEditing = false;
_editItem = null;
//if (!string.IsNullOrWhiteSpace(value))
// Save();
}
private bool IsCloseSibling(BookItem target, BookItem dragging, int relative)
{
if (relative == 0)
{
return(false);
}
if (target.Parent != dragging.Parent)
{
return(false);
}
var targetIndex = GetItemIndex(target);
var draggingIndex = GetItemIndex(dragging);
return(draggingIndex == targetIndex + relative);
}
private double GetWidth(BookItem target, TreeViewItem targetViewItem, int relative)
{
var index = target.Parent == null
? Book.Items.IndexOf(target)
: target.Parent.Items.IndexOf(target);
if (index < 0)
{
throw new Exception("panic");
}
index += relative;
if (index < 0)
{
index++;
}
var count = target.Parent == null ? Book.Items.Count : target.Parent.Items.Count;
if (index == count)
{
index--;
}
if (index < 0)
{
throw new Exception("panic");
}
var other = target.Parent == null
? Book.Items[index] as BookItem
: target.Parent.Items[index];
//Debug.WriteLine("W: " + target.Header + " - " + other.Header);
var targetPresenter = GetPresenter(targetViewItem);
var otherViewItem = GetContainerFromItem(other) as TreeViewItem;
var otherPresenter = GetPresenter(otherViewItem);
var offset = targetPresenter.TranslatePoint(new Point(0, 0), targetViewItem).X;
return(offset + Math.Max(otherPresenter.DesiredSize.Width, targetPresenter.DesiredSize.Width));
}
private void Book_MouseMove(object sender, MouseEventArgs e)
{
if (e.LeftButton != MouseButtonState.Pressed)
{
return;
}
// Note: This should be based on some accessibility number and not just 2 pixels
const double trigger = 2.0;
var currentPosition = e.GetPosition(Book);
var dx = Math.Abs(currentPosition.X - _lastMouseDown.X);
var dy = Math.Abs(currentPosition.Y - _lastMouseDown.Y);
if (dx <= trigger || dy <= trigger)
{
return;
}
// todo: cannot drag 'Recents' folder, anything else is ok
// todo: cannot drag folder to child?
var selectedItem = (BookItem)Book.SelectedItem;
if (selectedItem == null || !CanBeDragged(selectedItem))
{
return;
}
var container = GetContainerFromItem(selectedItem);
if (container != null)
{
_sourceItem = selectedItem;
var finalDropEffect = DragDrop.DoDragDrop(container, selectedItem, DragDropEffect);
SetAdorner(null);
lock (_booklock)
{
DoDrop(finalDropEffect);
}
}
}
private TreeViewItem GetContainerFromItem(BookItem item)
{
var _stack = new Stack <BookItem>();
_stack.Push(item);
var parent = item.Parent;
while (parent != null)
{
_stack.Push(parent);
parent = parent.Parent;
}
ItemsControl container = Book;
while ((_stack.Count > 0) && (container != null))
{
BookItem top = _stack.Pop();
container = (ItemsControl)container.ItemContainerGenerator.ContainerFromItem(top);
}
return(container as TreeViewItem);
}
private int GetItemIndex(BookItem item)
{
return(item.Parent == null?Book.Items.IndexOf(item) : item.Parent.Items.IndexOf(item));
}
private void BeginEdit(BookItem bookItem)
{
_editItem = bookItem;
_editOrigin = bookItem.Header;
bookItem.IsEditing = true;
}
/// <summary>
/// Initializes a new instance of the <see cref="BookItem"/> class with a parent item.
/// </summary>
/// <param name="parent">A parent item, or <c>null</c> for root items.</param>
/// <param name="type">The book item type.</param>
/// <param name="path">The path of the solution.</param>
public BookItem(BookItem parent, BookItemType type, string path = null)
: this(parent, type, path, new ObservableCollection <BookItem>())
{
}
