private bool CheckDropTarget(List <Tasks.TaskNodeViewModel> _sourceItems, Tasks.TaskNodeViewModel _targetItem)
{
//Check whether the target item is meeting your condition
bool _isEqual = true;
/*
* foreach( Tasks.TaskNodeViewModel vm in _sourceItems )
* if(vm.Name == _targetItem.Name)
* _isEqual = false;
*/
// Drop possible if: target==folder and target!=Parent and target!=self
foreach (Tasks.TaskNodeViewModel vm in _sourceItems)
{
if ((vm.Parent == _targetItem) || (vm == _targetItem))
{
_isEqual = false;
}
}
if (_targetItem.IsFolder == false)
{
_isEqual = false;
}
return(_isEqual);
}
private void OnItemMouseDoubleClick(object sender, MouseButtonEventArgs args)
{
if (sender is TreeViewItem)
{
if (!((TreeViewItem)sender).IsSelected)
{
return;
}
if (sender != null)
{
Tasks.TaskNodeViewModel node = ((TreeViewItem)sender).DataContext as Tasks.TaskNodeViewModel;
if (node != null)
{
// Datei Öffnen
try
{
System.Diagnostics.Process process = new System.Diagnostics.Process();
process.EnableRaisingEvents = false;
process.StartInfo.FileName = node.Path_1_Original;
process.Start();
}
catch (Exception ex)
{
MessageBox.Show("Cant execute " + node.Path_1_Original + " : " + ex.Message);
}
}
}
}
}
private void TreeView_After_DragOver(object sender, DragEventArgs e)
{
try
{
Point currentPosition = e.GetPosition(TreeView_After);
if ((Math.Abs(currentPosition.X - _lastMouseDown.X) > 10.0) ||
(Math.Abs(currentPosition.Y - _lastMouseDown.Y) > 10.0))
{
// Verify that this is a valid drop and then store the drop target
Tasks.TaskNodeViewModel item = GetNearestContainer(e.OriginalSource as UIElement);
if (CheckDropTarget(draggedItems, item))
{
e.Effects = DragDropEffects.Move;
}
else
{
e.Effects = DragDropEffects.None;
}
}
e.Handled = true;
}
catch (Exception ex)
{
MessageBox.Show("TaskView DragOver: " + ex.Message);
e.Effects = DragDropEffects.None;
}
}
/*
* private void CopyItem(List<Tasks.TaskNodeViewModel> _sourceItems, Tasks.TaskNodeViewModel _targetItem)
* {
*
* //Asking user wether he want to drop the dragged TreeViewItem here or not
* if (MessageBox.Show("Would you like to drop the selected items into " + _targetItem.Name + "", "", MessageBoxButton.YesNo) == MessageBoxResult.Yes)
* {
* try
* {
* foreach(Tasks.TaskNodeViewModel vm in _sourceItems)
* _targetItem.Children.Add(vm);
* }
* catch (Exception)
* {
*
* }
* }
*
* }
*/
private void MoveItem(List <Tasks.TaskNodeViewModel> _sourceItems, Tasks.TaskNodeViewModel _targetItem)
{
//Asking user wether he want to drop the dragged TreeViewItem here or not
if (MessageBox.Show("Would you like to move the selected items into " + _targetItem.Name + "", "", MessageBoxButton.YesNo) == MessageBoxResult.Yes)
{
try
{
foreach (Tasks.TaskNodeViewModel vm in _sourceItems)
{
// ___SOURCE
if (taskViewParentType == TaskViewParentType.Source) // Update FileListsAfter
{
Tasks.TaskNodeViewModel newNode = vm.Clone(_targetItem, taskPlannerBase.IDAfterSource++);
_targetItem.Children.Add(newNode);
foreach (TaskPlanner.FileListEntry entry in tasks.fileLists.SourceFileListAfter)
{
if (entry.targetNode == vm)
{
entry.targetNode = newNode; // Update FileList
}
}
}
// ___TARGET
else
{
Tasks.TaskNodeViewModel newNode = vm.Clone(_targetItem, taskPlannerBase.IDAfterTarget++);
_targetItem.Children.Add(newNode);
foreach (TaskPlanner.FileListEntry entry in tasks.fileLists.TargetFileListAfter)
{
if (entry.targetNode == vm)
{
entry.targetNode = newNode; // Update FileList
}
}
}
// Von Original Parent entfernen
//foreach (Tasks.TaskNodeViewModel vm in _sourceItems)
//{
vm.RemoveSelf();
//}
}
}
catch (Exception ex)
{
MessageBox.Show("TaskView MoveItem: " + ex.Message);
}
InitializeComponent();
}
}
private Tasks.TaskNodeViewModel GetNearestContainer(UIElement element)
{
// Walk up the element tree to the nearest tree view item.
TreeViewItem UIContainer = FindParent <TreeViewItem>(element);
Tasks.TaskNodeViewModel NVContainer = null;
if (UIContainer != null)
{
NVContainer = UIContainer.DataContext as Tasks.TaskNodeViewModel;
}
return(NVContainer);
}
private void TreeView_After_Drop(object sender, DragEventArgs e)
{
try
{
e.Effects = DragDropEffects.None;
e.Handled = true;
// Verify that this is a valid drop and then store the drop target
Tasks.TaskNodeViewModel TargetItem = GetNearestContainer(e.OriginalSource as UIElement);
if (TargetItem != null && draggedItems != null)
{
_target = TargetItem;
e.Effects = DragDropEffects.Move;
}
}
catch (Exception ex)
{
MessageBox.Show("TaskView Drop: " + ex.Message);
e.Effects = DragDropEffects.None;
}
}
private void TreeView_After_MouseMove(object sender, MouseEventArgs e)
{
try
{
if (e.LeftButton == MouseButtonState.Pressed)
{
UIElement element = e.OriginalSource as UIElement;
bool bGridSplitter = CheckGridSplitter(element);
Point currentPosition = e.GetPosition(TreeView_After);
double movedX = 0, movedY = 0;
if (!((_lastMouseDown.X == -1) && (_lastMouseDown.Y == -1)))
{
movedX = Math.Abs(currentPosition.X - _lastMouseDown.X);
movedY = Math.Abs(currentPosition.Y - _lastMouseDown.Y);
}
if ((movedX > const_DragMoveDist) ||
(movedY > const_DragMoveDist))
{
//draggedItem = (Tasks.TaskNodeViewModel)TreeView_After.SelectedItem;
if (NVM_TreeView_After_selectedItems.Count > 0)
{
draggedItems = new List <Tasks.TaskNodeViewModel>();
foreach (Tasks.TaskNodeViewModel vm in NVM_TreeView_After_selectedItems.Keys)
{
draggedItems.Add(vm);
}
}
else
{
draggedItems = null;
}
if ((draggedItems != null) && !bGridSplitter)
{
DragDropEffects finalDropEffect = DragDrop.DoDragDrop(TreeView_After, TreeView_After.SelectedValue,
DragDropEffects.Move);
//Checking target is not null and item is dragging(moving)
if ((finalDropEffect == DragDropEffects.Move) && (_target != null))
{
// A Move drop was accepted
/*
* bool Correct_drop = true;
* foreach( Tasks.TaskNodeViewModel vm in draggedItems )
* if(vm.Name == _target.Name)
* Correct_drop = false;
*/
//private bool CheckDropTarget(List<Tasks.TaskNodeViewModel> _sourceItems, Tasks.TaskNodeViewModel _targetItem)
if (CheckDropTarget(draggedItems, _target))
{
MoveItem(draggedItems, _target);
_target = null;
draggedItems = null;
}
}
}
}
}
}
catch (Exception ex)
{
MessageBox.Show("TaskView MouseMove: " + ex.Message);
draggedItems = null;
}
}
