public void GetViewIndexRange(bool includePartial, out int firstIndex, out int lastIndex)
{
if (this.Items.Count > 0)
{
firstIndex = 0;
lastIndex = this.Items.Count - 1;
if (this.scrollViewer == null || this.Items.Count <= 1)
{
return;
}
Thickness thickness = new Thickness(this.scrollViewer.BorderThickness.Left + this.scrollViewer.Padding.Left, this.scrollViewer.BorderThickness.Top + this.scrollViewer.Padding.Top, this.scrollViewer.BorderThickness.Right + this.scrollViewer.Padding.Right, this.scrollViewer.BorderThickness.Bottom + this.scrollViewer.Padding.Bottom);
Rect rect1 = this.scrollViewer.TransformToVisual(Application.Current.RootVisual).TransformBounds(new Rect(new Point(0.0, 0.0), this.scrollViewer.RenderSize));
ReorderListBoxItem reorderListBoxItem1 = VisualTreeHelper.FindElementsInHostCoordinates(ReorderListBox.GetHostCoordinates(new Point(rect1.Left + thickness.Left, rect1.Top + thickness.Top)), (UIElement)this.scrollViewer).OfType <ReorderListBoxItem>().FirstOrDefault <ReorderListBoxItem>();
if (reorderListBoxItem1 != null)
{
Rect rect2 = reorderListBoxItem1.TransformToVisual(Application.Current.RootVisual).TransformBounds(new Rect(new Point(0.0, 0.0), reorderListBoxItem1.RenderSize));
firstIndex = this.ItemContainerGenerator.IndexFromContainer((DependencyObject)reorderListBoxItem1);
if (!includePartial && firstIndex < this.Items.Count - 1 && (rect2.Top < rect1.Top && rect2.Bottom < rect1.Bottom))
{
firstIndex = firstIndex + 1;
}
}
ReorderListBoxItem reorderListBoxItem2 = VisualTreeHelper.FindElementsInHostCoordinates(ReorderListBox.GetHostCoordinates(new Point(rect1.Left + thickness.Left, rect1.Bottom - thickness.Bottom - 1.0)), (UIElement)this.scrollViewer).OfType <ReorderListBoxItem>().FirstOrDefault <ReorderListBoxItem>();
if (reorderListBoxItem2 == null)
{
return;
}
Rect rect3 = reorderListBoxItem2.TransformToVisual(Application.Current.RootVisual).TransformBounds(new Rect(new Point(0.0, 0.0), reorderListBoxItem2.RenderSize));
lastIndex = this.ItemContainerGenerator.IndexFromContainer((DependencyObject)reorderListBoxItem2);
if (includePartial || lastIndex <= firstIndex || (rect3.Bottom <= rect1.Bottom || rect3.Top <= rect1.Top))
{
return;
}
lastIndex = lastIndex - 1;
}
else
{
firstIndex = -1;
lastIndex = -1;
}
}
private void UpdateDropTarget(double dragItemOffset, bool showTransition)
{
// ISSUE: explicit reference operation
// ISSUE: explicit reference operation
ReorderListBoxItem targetItemContainer = (ReorderListBoxItem)Enumerable.FirstOrDefault <ReorderListBoxItem>(Enumerable.OfType <ReorderListBoxItem>((IEnumerable)VisualTreeHelper.FindElementsInHostCoordinates(ReorderListBox.GetHostCoordinates(new Point(((Rect)this.dragInterceptorRect).Left, ((Rect)this.dragInterceptorRect).Top + dragItemOffset)), (UIElement)this.itemsPanel)));
if (targetItemContainer == null)
{
return;
}
Rect rect = ((UIElement)targetItemContainer.DragHandle).TransformToVisual((UIElement)this.dragInterceptor).TransformBounds(new Rect(new Point(0.0, 0.0), ((UIElement)targetItemContainer.DragHandle).RenderSize));
// ISSUE: explicit reference operation
// ISSUE: explicit reference operation
double num1 = (rect.Top + rect.Bottom) / 2.0;
int num2 = ((PresentationFrameworkCollection <UIElement>) this.itemsPanel.Children).IndexOf((UIElement)targetItemContainer);
int count = ((PresentationFrameworkCollection <UIElement>) this.itemsPanel.Children).Count;
bool after = dragItemOffset > num1;
ReorderListBoxItem reorderListBoxItem1 = null;
if (!after && num2 > 0)
{
ReorderListBoxItem reorderListBoxItem2 = (ReorderListBoxItem)((PresentationFrameworkCollection <UIElement>) this.itemsPanel.Children)[num2 - 1];
if ((string)(((FrameworkElement)reorderListBoxItem2).Tag as string) == "DropAfterIndicator")
{
reorderListBoxItem1 = reorderListBoxItem2;
}
}
else if (after && num2 < count - 1)
{
ReorderListBoxItem reorderListBoxItem2 = (ReorderListBoxItem)((PresentationFrameworkCollection <UIElement>) this.itemsPanel.Children)[num2 + 1];
if ((string)(((FrameworkElement)reorderListBoxItem2).Tag as string) == "DropBeforeIndicator")
{
reorderListBoxItem1 = reorderListBoxItem2;
}
}
if (reorderListBoxItem1 == null)
{
targetItemContainer.DropIndicatorHeight = ((FrameworkElement)this.dragIndicator).Height;
string str = after ? "DropAfterIndicator" : "DropBeforeIndicator";
VisualStateManager.GoToState((Control)targetItemContainer, str, showTransition);
((FrameworkElement)targetItemContainer).Tag = str;
reorderListBoxItem1 = targetItemContainer;
}
for (int index = num2 - 5; index <= num2 + 5; ++index)
{
if (index >= 0 && index < count)
{
ReorderListBoxItem reorderListBoxItem2 = (ReorderListBoxItem)((PresentationFrameworkCollection <UIElement>) this.itemsPanel.Children)[index];
if (reorderListBoxItem2 != reorderListBoxItem1)
{
VisualStateManager.GoToState((Control)reorderListBoxItem2, "NoDropIndicator", showTransition);
((FrameworkElement)reorderListBoxItem2).Tag = ("NoDropIndicator");
}
}
}
this.UpdateDropTargetIndex(targetItemContainer, after);
}
private void UpdateDropTarget(double dragItemOffset, bool showTransition)
{
ReorderListBoxItem targetItemContainer = VisualTreeHelper.FindElementsInHostCoordinates(ReorderListBox.GetHostCoordinates(new Point(this.dragInterceptorRect.Left, this.dragInterceptorRect.Top + dragItemOffset)), (UIElement)this.itemsPanel).OfType <ReorderListBoxItem>().FirstOrDefault <ReorderListBoxItem>();
if (targetItemContainer == null)
{
return;
}
Rect rect = targetItemContainer.DragHandle.TransformToVisual((UIElement)this.dragInterceptor).TransformBounds(new Rect(new Point(0.0, 0.0), targetItemContainer.DragHandle.RenderSize));
double num1 = (rect.Top + rect.Bottom) / 2.0;
int num2 = this.itemsPanel.Children.IndexOf((UIElement)targetItemContainer);
int count = this.itemsPanel.Children.Count;
bool after = dragItemOffset > num1;
ReorderListBoxItem reorderListBoxItem1 = (ReorderListBoxItem)null;
if (!after && num2 > 0)
{
ReorderListBoxItem reorderListBoxItem2 = (ReorderListBoxItem)this.itemsPanel.Children[num2 - 1];
if (reorderListBoxItem2.Tag as string == "DropAfterIndicator")
{
reorderListBoxItem1 = reorderListBoxItem2;
}
}
else if (after && num2 < count - 1)
{
ReorderListBoxItem reorderListBoxItem2 = (ReorderListBoxItem)this.itemsPanel.Children[num2 + 1];
if (reorderListBoxItem2.Tag as string == "DropBeforeIndicator")
{
reorderListBoxItem1 = reorderListBoxItem2;
}
}
if (reorderListBoxItem1 == null)
{
targetItemContainer.DropIndicatorHeight = this.dragIndicator.Height;
string stateName = after ? "DropAfterIndicator" : "DropBeforeIndicator";
VisualStateManager.GoToState((Control)targetItemContainer, stateName, showTransition);
targetItemContainer.Tag = (object)stateName;
reorderListBoxItem1 = targetItemContainer;
}
for (int index = num2 - 5; index <= num2 + 5; ++index)
{
if (index >= 0 && index < count)
{
ReorderListBoxItem reorderListBoxItem2 = (ReorderListBoxItem)this.itemsPanel.Children[index];
if (reorderListBoxItem2 != reorderListBoxItem1)
{
VisualStateManager.GoToState((Control)reorderListBoxItem2, "NoDropIndicator", showTransition);
reorderListBoxItem2.Tag = (object)"NoDropIndicator";
}
}
}
this.UpdateDropTargetIndex(targetItemContainer, after);
}
private void dragInterceptor_ManipulationStarted(object sender, ManipulationStartedEventArgs e)
{
this.scrollViewer.VerticalScrollBarVisibility = ((ScrollBarVisibility)0);
if (this.dragItem != null)
{
return;
}
e.Handled = true;
if (this.itemsPanel == null)
{
this.itemsPanel = (Panel)VisualTreeHelper.GetChild((DependencyObject)((ContentControl)this.scrollViewer).Content, 0);
}
this._isManipulating = true;
GeneralTransform visual = ((UIElement)this.dragInterceptor).TransformToVisual(Application.Current.RootVisual);
List <UIElement> list = (List <UIElement>)Enumerable.ToList <UIElement>(VisualTreeHelper.FindElementsInHostCoordinates(ReorderListBox.GetHostCoordinates(visual.Transform(e.ManipulationOrigin)), (UIElement)this.itemsPanel));
ReorderListBoxItem reorderListBoxItem = (ReorderListBoxItem)Enumerable.FirstOrDefault <ReorderListBoxItem>(Enumerable.OfType <ReorderListBoxItem>((IEnumerable)list));
if (reorderListBoxItem == null || !list.Contains((UIElement)reorderListBoxItem.DragHandle))
{
return;
}
VisualStateManager.GoToState((Control)reorderListBoxItem, "Dragging", true);
Point point = ((UIElement)reorderListBoxItem).TransformToVisual((UIElement)this.dragInterceptor).Transform(new Point(0.0, 0.0));
// ISSUE: explicit reference operation
Canvas.SetLeft((UIElement)this.dragIndicator, ((Point)@point).X);
// ISSUE: explicit reference operation
Canvas.SetTop((UIElement)this.dragIndicator, ((Point)@point).Y);
Image dragIndicator1 = this.dragIndicator;
Size renderSize1 = ((UIElement)reorderListBoxItem).RenderSize;
// ISSUE: explicit reference operation
double width = ((Size)@renderSize1).Width;
((FrameworkElement)dragIndicator1).Width = width;
Image dragIndicator2 = this.dragIndicator;
Size renderSize2 = ((UIElement)reorderListBoxItem).RenderSize;
// ISSUE: explicit reference operation
double height = ((Size)@renderSize2).Height;
((FrameworkElement)dragIndicator2).Height = height;
this.dragItemContainer = reorderListBoxItem;
this.dragItem = ((ContentControl)this.dragItemContainer).Content;
this.isDragItemSelected = this.dragItemContainer.IsSelected;
this.dragInterceptorRect = visual.TransformBounds(new Rect(new Point(0.0, 0.0), ((UIElement)this.dragInterceptor).RenderSize));
this.dropTargetIndex = -1;
}
private void dragInterceptor_ManipulationStarted(object sender, ManipulationStartedEventArgs e)
{
this.scrollViewer.VerticalScrollBarVisibility = ScrollBarVisibility.Disabled;
if (this.dragItem != null)
{
return;
}
e.Handled = true;
if (this.itemsPanel == null)
{
this.itemsPanel = (Panel)VisualTreeHelper.GetChild((DependencyObject)this.scrollViewer.Content, 0);
}
this._isManipulating = true;
GeneralTransform visual = this.dragInterceptor.TransformToVisual(Application.Current.RootVisual);
List <UIElement> list = VisualTreeHelper.FindElementsInHostCoordinates(ReorderListBox.GetHostCoordinates(visual.Transform(e.ManipulationOrigin)), (UIElement)this.itemsPanel).ToList <UIElement>();
ReorderListBoxItem reorderListBoxItem = list.OfType <ReorderListBoxItem>().FirstOrDefault <ReorderListBoxItem>();
if (reorderListBoxItem == null || !list.Contains((UIElement)reorderListBoxItem.DragHandle))
{
return;
}
VisualStateManager.GoToState((Control)reorderListBoxItem, "Dragging", true);
Point point = reorderListBoxItem.TransformToVisual((UIElement)this.dragInterceptor).Transform(new Point(0.0, 0.0));
Canvas.SetLeft((UIElement)this.dragIndicator, point.X);
Canvas.SetTop((UIElement)this.dragIndicator, point.Y);
this.dragIndicator.Width = reorderListBoxItem.RenderSize.Width;
this.dragIndicator.Height = reorderListBoxItem.RenderSize.Height;
this.dragItemContainer = reorderListBoxItem;
this.dragItem = this.dragItemContainer.Content;
this.isDragItemSelected = this.dragItemContainer.IsSelected;
this.dragInterceptorRect = visual.TransformBounds(new Rect(new Point(0.0, 0.0), this.dragInterceptor.RenderSize));
this.dropTargetIndex = -1;
}