public static void ClearAllSurfaceDragCursor(this SurfaceWindow _window)
{
foreach (SurfaceDragCursor cursor in SurfaceDragDrop.GetAllCursors(_window))
{
SurfaceDragDrop.CancelDragDrop(cursor);
}
}
private void OnMainDrag(object sender, InputEventArgs e)
{
FrameworkElement findSource = e.OriginalSource as FrameworkElement;
SurfaceListBoxItem draggedElement = null;
// Find the touched SurfaceListBoxItem object.
while (draggedElement == null && findSource != null)
{
if ((draggedElement = findSource as SurfaceListBoxItem) == null)
{
findSource = VisualTreeHelper.GetParent(findSource) as FrameworkElement;
}
}
if (draggedElement == null)
{
return;
}
// Create the cursor visual.
ContentControl cursorVisual = new ContentControl()
{
Content = draggedElement.DataContext,
Style = FindResource("CursorStyle") as Style
};
// Add a handler. This will enable the application to change the visual cues.
SurfaceDragDrop.AddTargetChangedHandler(cursorVisual, OnTargetChanged);
// Create a list of input devices. Add the touches that
// are currently captured within the dragged element and
// the current touch (if it isn't already in the list).
List <InputDevice> devices = new List <InputDevice>();
devices.Add(e.Device);
foreach (TouchDevice touch in draggedElement.TouchesCapturedWithin)
{
if (touch != e.Device)
{
devices.Add(touch);
}
}
// Get the drag source object
ItemsControl dragSource = ItemsControl.ItemsControlFromItemContainer(draggedElement);
SurfaceDragCursor startDragOkay =
SurfaceDragDrop.BeginDragDrop(
dragSource, // The SurfaceListBox object that the cursor is dragged out from.
draggedElement, // The SurfaceListBoxItem object that is dragged from the drag source.
cursorVisual, // The visual element of the cursor.
draggedElement.DataContext, // The data associated with the cursor.
devices, // The input devices that start dragging the cursor.
DragDropEffects.Move); // The allowed drag-and-drop effects of the operation.
// If the drag began successfully, set e.Handled to true.
// Otherwise SurfaceListBoxItem captures the touch
// and causes the drag operation to fail.
e.Handled = (startDragOkay != null);
}
/// Will be used when the user touches an element on the scatterview
/// will gather the required data for the drag and drop operation and start it
/// Once user has dropped item, either a DragCanceled or DragCompleted event will be fired,
/// depending on where the item is dropped
/// If they drop the item on the ScatterView or LibraryContainer the DragCompleted Event will fire
/// If they drop it to the left of the right of the LibraryContainer the DragCanceled event will fire
private void Scatter_PreviewTouchDown(object sender, TouchEventArgs e)
{
FrameworkElement findSource = e.OriginalSource as FrameworkElement;
ScatterViewItem draggedElement = null;
//find the ScatterViewItem object that is being touched
while (draggedElement == null && findSource != null)
{
if ((draggedElement = findSource as ScatterViewItem) == null)
{
findSource = VisualTreeHelper.GetParent(findSource) as FrameworkElement;
}
}
if (draggedElement == null)
{
return;
}
PhotoData data = draggedElement.Content as PhotoData;
//create the cursor visual
ContentControl cursorVisual = new ContentControl()
{
Content= draggedElement.DataContext,
Style = FindResource("CursorStyle") as Style
};
//create the list of input devices
//add the touches that are currently captured within the dragged elt and
//the current touch (if it isn't already in the list)
List<InputDevice> devices = new List<InputDevice>();
devices.Add(e.TouchDevice);
foreach (TouchDevice touch in draggedElement.TouchesCapturedWithin)
{
if (touch != e.TouchDevice)
{
devices.Add(touch);
}
}
//get the drag source object
ItemsControl dragSource = ItemsControl.ItemsControlFromItemContainer(draggedElement);
//the scatterview object that the cursor is dragged out from
SurfaceDragDrop.BeginDragDrop(
dragSource,
draggedElement,
cursorVisual,
draggedElement.DataContext,
devices,
DragDropEffects.Move);
//this prevents the default touch operator from happening
e.Handled = true;
//hide the scatterviewitem for now. we will remove it if the dragdrop is successful
draggedElement.Visibility = Visibility.Hidden;
}
private void StartDragDrop(ListBox sourceListBox, InputEventArgs e)
{
DependencyObject downSource = InputDeviceHelper.GetDragSource(e.Device);
Debug.Assert(downSource != null);
SurfaceListBoxItem draggedListBoxItem = GetVisualAncestor <SurfaceListBoxItem>(downSource);
if (draggedListBoxItem == null)
{
return;
}
SimpleCard data = draggedListBoxItem.Content as SimpleCard;
// Create a new ScatterViewItem as cursor visual.
ScatterViewItem cursorVisual = new ScatterViewItem();
cursorVisual.Style = (Style)FindResource("ScatterItemStyle");
cursorVisual.Content = data;
IEnumerable <InputDevice> devices = null;
TouchEventArgs touchEventArgs = e as TouchEventArgs;
if (touchEventArgs != null)
{
devices = MergeInputDevices(draggedListBoxItem.TouchesCapturedWithin, e.Device);
}
else
{
devices = new List <InputDevice>(new InputDevice[] { e.Device });
}
SurfaceDragCursor cursor = SurfaceDragDrop.BeginDragDrop(HandListBox, draggedListBoxItem, cursorVisual, data, devices, DragDropEffects.All);
// Reset the input device's state.
InputDeviceHelper.ClearDeviceState(e.Device);
((ObservableCollection <SimpleCard>) this.HandListBox.ItemsSource).Remove(data);
}
private void OnExileButtonLoaded(object sender, RoutedEventArgs e)
{
SurfaceDragDrop.AddDropHandler(ExileButton, OnExileButtonCursorDrop);
}
private void OnLoaded(object sender, RoutedEventArgs e)
{
SurfaceDragDrop.AddDropHandler(this, OnCursorDrop);
}
private void DragSourcePreviewInputDeviceDown(object sender, InputEventArgs e)
{
FrameworkElement findSource = e.OriginalSource as FrameworkElement;
ScatterViewItem draggedElement = null;
// Find the ScatterViewItem object that is being touched.
while (draggedElement == null && findSource != null)
{
if ((draggedElement = findSource as ScatterViewItem) == null)
{
findSource = VisualTreeHelper.GetParent(findSource) as FrameworkElement;
}
}
if (draggedElement == null)
{
return;
}
DragableImageItem data = draggedElement.Content as DragableImageItem;
// If the data has not been specified as draggable,
// or the ScatterViewItem cannot move, return.
if (data == null || !data.CanDrag || !draggedElement.CanMove)
{
return;
}
// Set the dragged element. This is needed in case the drag operation is canceled.
data.DraggedElement = draggedElement;
// Create the cursor visual.
ContentControl cursorVisual = new ContentControl()
{
Content = draggedElement.DataContext,
Style = FindResource("CursorStyle") as Style
};
// Create a list of input devices,
// and add the device passed to this event handler.
List <InputDevice> devices = new List <InputDevice>();
devices.Add(e.Device);
// If there are touch devices captured within the element,
// add them to the list of input devices.
foreach (InputDevice device in draggedElement.TouchesCapturedWithin)
{
if (device != e.Device)
{
devices.Add(device);
}
}
// Get the drag source object.
ItemsControl dragSource = ItemsControl.ItemsControlFromItemContainer(draggedElement);
// Start the drag-and-drop operation.
SurfaceDragCursor cursor =
SurfaceDragDrop.BeginDragDrop(
// The ScatterView object that the cursor is dragged out from.
dragSource,
// The ScatterViewItem object that is dragged from the drag source.
draggedElement,
// The visual element of the cursor.
cursorVisual,
// The data attached with the cursor.
draggedElement.DataContext,
// The input devices that start dragging the cursor.
devices,
// The allowed drag-and-drop effects of the operation.
DragDropEffects.Move);
// If the cursor was created, the drag-and-drop operation was successfully started.
if (cursor != null)
{
// Hide the ScatterViewItem.
draggedElement.Visibility = Visibility.Hidden;
// This event has been handled.
e.Handled = true;
}
}
/*
* Function called if the mouse button is down
*/
private void OnDragSourcePreviewMouseDown(object sender, MouseButtonEventArgs e)
{
FrameworkElement findSource = e.OriginalSource as FrameworkElement;
ScatterViewItem draggedElement = null;
// Find the ScatterViewItem object that is being touched.
while (draggedElement == null && findSource != null)
{
if ((draggedElement = findSource as ScatterViewItem) == null)
{
findSource = VisualTreeHelper.GetParent(findSource) as FrameworkElement;
}
}
// In case no element has been clicked
if (draggedElement == null)
{
return;
}
SimpleCard data = draggedElement.Content as SimpleCard;
// If the data has not been specified as draggable,
// or the ScatterViewItem cannot move, return.
if (data == null)
{
return;
}
// Create the cursor visual.
ScatterViewItem cursorVisual = new ScatterViewItem()
{
Content = draggedElement.DataContext,
Style = FindResource("ScatterItemStyle") as Style
};
// Create a list of input devices. Add the touches that
// are currently captured within the dragged element and
// the current touch (if it isn't already in the list).
List <InputDevice> devices = new List <InputDevice>();
devices.Add(e.Device);
foreach (TouchDevice touch in draggedElement.TouchesCapturedWithin)
{
if (touch != e.Device)
{
devices.Add(touch);
}
}
// Get the drag source object
ItemsControl dragSource = ItemsControl.ItemsControlFromItemContainer(draggedElement);
SurfaceDragCursor startDragOkay =
SurfaceDragDrop.BeginDragDrop(
dragSource, // The ScatterView object that the cursor is dragged out from.
draggedElement, // The ScatterViewItem object that is dragged from the drag source.
cursorVisual, // The visual element of the cursor.
draggedElement.DataContext, // The data attached with the cursor.
devices, // The input devices that start dragging the cursor.
DragDropEffects.Move); // The allowed drag-and-drop effects of the operation.
if (startDragOkay != null)
{
// Set e.Handled to true, otherwise the ScatterViewItem will capture the touch
// and cause the BeginDragDrop to fail.
e.Handled = true;
// Hide the ScatterViewItem.
draggedElement.Visibility = Visibility.Hidden;
}
// Remove the element from the container
((ObservableCollection <SimpleCard>) this.scatterView.ItemsSource).Remove(data);
}
