private static void SetDragImage(Gtk.TreeView menuLayout, Gtk.DragBeginArgs args)
{
var selection = menuLayout.Selection;
var firstSelectedPath = selection.GetSelectedRows().First();
Gtk.TreeIter iter;
if (menuLayout.Model.GetIter(out iter, firstSelectedPath))
{
var firstDraggedItem = menuLayout.Model.GetValue(iter, 0) as FileNodeViewModel;
string text;
Gdk.Pixbuf icon;
if (selection.CountSelectedRows() > 1)
{
text = "<Multiple Items>";
icon = firstDraggedItem is FolderViewModel ? DragMultipleItemsFolderImage : DragMultipleItemsProgramImage;
}
else
{
text = firstDraggedItem.LongName;
icon = firstDraggedItem.Icon;
}
var dragWidget = new DragDropImage(icon, text);
Gtk.Drag.SetIconWidget(args.Context, dragWidget, 0, 0);
}
}
private void SlideBack()
{
_isAnimating = true;
if (ZoomOnDrag)
{
ScaleTransform transform = (ScaleTransform)_overlayElement.LayoutTransform;
DoubleAnimationUsingKeyFrames anim = new DoubleAnimationUsingKeyFrames();
EasingDoubleKeyFrame frame = new EasingDoubleKeyFrame(1, Settings.AnimationsEnabled ? KeyTime.FromTimeSpan(AnimationHelpers.AnimationDuration.TimeSpan) : KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(0)));
frame.EasingFunction = AnimationHelpers.EasingFunction;
anim.KeyFrames.Add(frame);
transform.BeginAnimation(ScaleTransform.ScaleXProperty, anim);
transform.BeginAnimation(ScaleTransform.ScaleYProperty, anim);
_overlayElement.BeginAnimation(OpacityProperty, anim);
}
if (Settings.AnimationsEnabled)
{
DispatcherTimer timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromMilliseconds(10);
timer.Tick += timer_Tick;
timer.Start();
}
else
{
AdornerLayer.GetAdornerLayer(PART_ItemsHost).Remove(_overlayElement);
_originalElement.Opacity = 1;
_overlayElement = null;
_isAnimating = false;
Mouse.Capture(null);
}
}
private void timer_Tick(object sender, EventArgs e)
{
if (_overlayElement != null)
{
if (Math.Abs(_overlayElement.LeftOffset) > 0.1 ||
Math.Abs(_overlayElement.TopOffset) > 0.1)
{
_overlayElement.LeftOffset -= _overlayElement.LeftOffset / 6;
_overlayElement.TopOffset -= _overlayElement.TopOffset / 6;
}
else
{
AdornerLayer.GetAdornerLayer(this).Remove(_overlayElement); //Application.Current.MainWindow.Content as Grid).Remove(_overlayElement);
_originalElement.ApplyAnimationClock(FrameworkElement.OpacityProperty, null);
_originalElement.Opacity = 1;
_overlayElement = null;
_isAnimating = false;
_dragCopy = false;
Mouse.Capture(null);
(sender as DispatcherTimer).Stop();
}
}
}
private void DragStarted()
{
_isDragging = true;
if (ZoomOnDrag)
{
_originalElement.Opacity = 0.6;
}
_overlayElement = new DragDropImage(_originalElement);
if (ZoomOnDrag)
{
_overlayElement.TopOffset -= 0.05 * _originalElement.ActualHeight;
_overlayElement.LeftOffset -= 0.05 * _originalElement.ActualWidth;
ScaleTransform transform = new ScaleTransform(1, 1);
_overlayElement.LayoutTransform = transform;
DoubleAnimationUsingKeyFrames anim = new DoubleAnimationUsingKeyFrames();
EasingDoubleKeyFrame frame = new EasingDoubleKeyFrame(1.1, Settings.AnimationsEnabled ? KeyTime.FromTimeSpan(AnimationHelpers.AnimationDuration.TimeSpan) : KeyTime.FromTimeSpan(TimeSpan.Zero));
frame.EasingFunction = AnimationHelpers.EasingFunction;
anim.KeyFrames.Add(frame);
transform.BeginAnimation(ScaleTransform.ScaleXProperty, anim);
transform.BeginAnimation(ScaleTransform.ScaleYProperty, anim);
}
AdornerLayer layer = AdornerLayer.GetAdornerLayer(PART_ItemsHost);
layer.Add(_overlayElement);
RaiseDragStartEvent();
}
private void DragStarted()
{
_isDragging = true;
_originalElement.Opacity = 1;
_overlayElement = new DragDropImage(_originalElement);
AdornerLayer layer = AdornerLayer.GetAdornerLayer(this); //Application.Current.MainWindow.Content as Grid);
layer.Add(_overlayElement);
}
private void SlideBack()
{
_isAnimating = true;
if (Settings.AnimationsEnabled)
{
DispatcherTimer timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromMilliseconds(10);
timer.Tick += timer_Tick;
timer.Start();
}
else
{
AdornerLayer.GetAdornerLayer(this).Remove(_overlayElement); //Application.Current.MainWindow.Content as Grid).Remove(_overlayElement);
_originalElement.ApplyAnimationClock(FrameworkElement.OpacityProperty, null);
_originalElement.Opacity = 1;
_overlayElement = null;
_isAnimating = false;
_dragCopy = false;
Mouse.Capture(null);
}
}
private void timer_Tick(object sender, EventArgs e)
{
if (_overlayElement != null)
{
if (Math.Abs(_overlayElement.LeftOffset) > 0.1 ||
Math.Abs(_overlayElement.TopOffset) > 0.1)
{
_overlayElement.LeftOffset -= _overlayElement.LeftOffset / 3;
_overlayElement.TopOffset -= _overlayElement.TopOffset / 3;
}
else
{
AdornerLayer.GetAdornerLayer(PART_ItemsHost).Remove(_overlayElement);
_originalElement.Opacity = 1;
_overlayElement = null;
_isAnimating = false;
Mouse.Capture(null);
((DispatcherTimer)sender).Stop();
}
}
}
public static void DragDropToolTip(object sender, RenderEventArgs e, DependencyObject view, Func <string> dragDescription)
{
InitializeData();
DragDropImage overlay = sender as DragDropImage;
DrawingContext dc = e.DrawingContext;
Window window = Window.GetWindow(view);
// Get a rectangle that represents the desired size of the rendered element
// after the rendering pass. This will be used to draw at the corners of the
// adorned element.
Rect adornedElementRect = new Rect(overlay.AdornedElement.RenderSize);
double offsetX = 62;
double offsetY = 2;
double tooltipWidth;
double tooltipHeight = 19;
string description = dragDescription();
FormattedText header = null;
FormattedText detail = null;
bool copy = false;
if (description != null)
{
copy = Keyboard.Modifiers == ModifierKeys.Control;
header = new FormattedText((copy ? "Copy" : "Move") + " to ",
CultureInfo.CurrentCulture, FlowDirection.LeftToRight,
NormalFont, 12, HeaderBrush);
detail = new FormattedText(description,
CultureInfo.CurrentCulture, FlowDirection.LeftToRight,
NormalFont, 12, DetailBrush);
tooltipWidth = Math.Round(header.WidthIncludingTrailingWhitespace + detail.Width) + 5 + 11 + 5 + 6;
}
else
{
tooltipWidth = 20;
}
double maxX = window.ActualWidth - tooltipWidth - 3;
double maxY = window.ActualHeight - tooltipHeight - 3;
Point absLocation = overlay.AdornedElement.TranslatePoint(adornedElementRect.TopLeft, window);
if (offsetX + overlay.LeftOffset + absLocation.X > maxX)
{
offsetX = maxX - overlay.LeftOffset - absLocation.X;
}
else if (offsetX + overlay.LeftOffset + absLocation.X < 2)
{
offsetX = 2 - overlay.LeftOffset - absLocation.X;
}
absLocation = overlay.AdornedElement.TranslatePoint(adornedElementRect.BottomLeft, window);
if (offsetY + overlay.TopOffset + absLocation.Y > maxY)
{
offsetY = maxY - overlay.TopOffset - absLocation.Y;
}
else if (offsetY + overlay.TopOffset + absLocation.Y < 2)
{
offsetY = 2 - overlay.TopOffset - absLocation.Y;
}
if (description != null)
{
Point rectangleTopLeft = adornedElementRect.BottomLeft;
rectangleTopLeft.Offset(offsetX + 0.5, offsetY + 0.5);
Point rectangleBottomRight = rectangleTopLeft;
rectangleBottomRight.Offset(tooltipWidth, tooltipHeight);
dc.DrawRectangle(Brushes.White, BorderPen, new Rect(rectangleTopLeft, rectangleBottomRight));
Point iconLocation = adornedElementRect.BottomLeft;
iconLocation.Offset(offsetX + 5, offsetY + 4);
dc.DrawImage(copy ? DragCopyImg : DragMoveImg, new Rect(iconLocation, new Size(11, 11)));
Point textLocation = adornedElementRect.BottomLeft;
textLocation.Offset(offsetX + 5 + 11 + 5, offsetY + 3.5);
dc.DrawText(header, textLocation);
textLocation.Offset(header.WidthIncludingTrailingWhitespace, 0);
dc.DrawText(detail, textLocation);
}
else
{
Point iconLocation = adornedElementRect.BottomLeft;
iconLocation.Offset(offsetX + 5, offsetY + 4);
dc.DrawImage(NoDragImg, new Rect(iconLocation, new Size(11, 11)));
}
}
public void DragFinished(bool cancelled)
{
if (_isDragging)
{
if (cancelled)
{
_isDown = false;
_isDragging = false;
SlideBack();
}
else
{
Mouse.Capture(null);
FrameworkElement directlyOver = Mouse.DirectlyOver as FrameworkElement;
while (!(directlyOver is TreeViewItem) && !(directlyOver is TreeView))
{
if (directlyOver == null)
{
_isDragging = false;
_isDown = false;
_dragCopy = false;
SlideBack();
return;
}
directlyOver = directlyOver.TemplatedParent as FrameworkElement;
}
TreeViewItem newParent;
TreeViewItem oldParent = _originalElement.Parent as TreeViewItem;
int oldIndex = oldParent.Items.IndexOf(_originalElement);
if (directlyOver is TreeViewItem)
{
newParent = directlyOver as TreeViewItem;
int index;
if (newParent.Parent is TreeViewItem)
{
newParent = newParent.Parent as TreeViewItem;
index = newParent.Items.IndexOf(directlyOver);
}
else
{
index = 0;
}
//
// Prevent items from being dragged between tree views.
//
if (newParent.Parent != oldParent.Parent)
{
DragFinished(true);
return;
}
if (!_dragCopy)
{
oldParent.Items.Remove(_originalElement);
newParent.Items.Insert(index, _originalElement);
_originalElement.IsSelected = true;
UpdateLayout();
}
else
{
//
// Hard-coded functionality only for Task objects.
//
UserTask copy = new UserTask(_originalElement.Header as UserTask);
copy.ID = IDGenerator.GenerateID();
//
// Copy the details file if it exists
//
if (File.Exists(TaskDatabase.TasksAppData + "\\" + (_originalElement.Header as UserTask).ID))
{
File.Copy(TaskDatabase.TasksAppData + "\\" + (_originalElement.Header as UserTask).ID,
TaskDatabase.TasksAppData + "\\" + copy.ID);
}
_originalElement = new TreeViewItem();
_originalElement.Header = copy;
newParent.Items.Insert(index, _originalElement);
_originalElement.IsSelected = true;
// Force a layout update, to ensure that all elements are
// in their correct locations.
UpdateLayout();
AdornerLayer layer = AdornerLayer.GetAdornerLayer(this);
layer.Remove(_overlayElement);
_overlayElement = new DragDropImage(_originalElement);
layer.Add(_overlayElement);
}
}
else
{
newParent = Items[Items.Count - 1] as TreeViewItem;
//
// Prevent items from being dragged between tree views.
//
if (newParent.Parent != oldParent.Parent)
{
DragFinished(true);
return;
}
if (!_dragCopy)
{
oldParent.Items.Remove(_originalElement);
newParent.Items.Add(_originalElement);
_originalElement.IsSelected = true;
UpdateLayout();
}
else
{
//
// Hard-coded functionality only for Task objects.
//
UserTask copy = new UserTask(_originalElement.Header as UserTask);
copy.ID = IDGenerator.GenerateID();
//
// Copy the details file if it exists
//
if (File.Exists(TaskDatabase.TasksAppData + "\\" + (_originalElement.Header as UserTask).ID))
{
File.Copy(TaskDatabase.TasksAppData + "\\" + (_originalElement.Header as UserTask).ID,
TaskDatabase.TasksAppData + "\\" + copy.ID);
}
_originalElement = new TreeViewItem();
_originalElement.Opacity = 1;
_originalElement.Header = copy;
newParent.Items.Add(_originalElement);
_originalElement.IsSelected = true;
// Force a layout update, to ensure that all elements are
// in their correct locations.
UpdateLayout();
AdornerLayer layer = AdornerLayer.GetAdornerLayer(this);
layer.Remove(_overlayElement);
_overlayElement = new DragDropImage(_originalElement);
layer.Add(_overlayElement);
}
}
newParent.IsExpanded = true;
Point mse = Mouse.GetPosition(_originalElement);
_overlayElement.LeftOffset = mse.X - _dragOffset.X;
_overlayElement.TopOffset = mse.Y - _dragOffset.Y;
DragDirection direction;
if (newParent == oldParent)
{
direction = newParent.Items.IndexOf(_originalElement) < oldIndex ? DragDirection.Up : DragDirection.Down;
}
else
{
direction = Items.IndexOf(newParent) < Items.IndexOf(oldParent) ? DragDirection.Up : DragDirection.Down;
}
if (!(newParent == oldParent && newParent.Items.IndexOf(_originalElement) == oldIndex))
{
OnItemReorder(new ItemReorderEventArgs(_originalElement, oldParent, newParent, _dragCopy, direction));
}
SlideBack();
}
}
else
{
_dragCopy = false;
Mouse.Capture(null);
}
_isDragging = false;
_isDown = false;
}
