/* ____________________________________________________________________
* Drag Source events
* ____________________________________________________________________
*/
static void DragSource_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
// Make this the new drag source
_currentSourceAdvisor = GetDragSourceAdvisor(sender as DependencyObject);
if (_currentSourceAdvisor.IsDraggable(e.Source as UIElement) == false) return;
_draggedElt = e.Source as UIElement;
_startPoint = e.GetPosition(GetTopContainer());
_isMouseDown = true;
}
static void DragSource_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
IDragSourceAdvisor adv = GetDragSourceAdvisor(sender as UIElement);
if (!adv.IsDraggable(e.Source as UIElement))
{
return;
}
DragSource = new DragInfo(adv);
DragSource.DraggedElement = e.Source as UIElement;
DragSource.StartPoint = e.GetPosition(DragSource.DraggedElement);
DragSource.IsMouseDown = true;
}
/// <summary>
/// Called when the left mouse button is pressed while the mouse pointer is over drag source element.
/// </summary>
/// <param name="sender">Drag source element.</param>
/// <param name="e">Provides data for mouse button.</param>
private static void DragSourcePreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
// Make this the new drag source
currentSourceAdvisor = GetDragSourceAdvisor(sender as DependencyObject);
// Todo: consider to pass FrameworkElement.DataContext directly instead if UIElement
if (currentSourceAdvisor.IsDraggable(e.Source as UIElement) == false)
{
return;
}
dragElement = e.Source as UIElement;
// Important: for global (i.e. "window root grid") adorner layer use local (to element) mouse position as start point.
startPoint = e.GetPosition((UIElement)e.Source);
// For local (to element) adorner layer use global mouse position as start point instead.
//startPoint = e.GetPosition(GetTopContainer());
isMouseDown = true;
}
/* ____________________________________________________________________
* Drag Source events
* ____________________________________________________________________
*/
private static void DragSource_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
// Make this the new drag source
CurrentDragSourceAdvisor = GetDragSourceAdvisor(sender as DependencyObject);
//UIElement candidat = e.Source as UIElement;
//if (CurrentDragSourceAdvisor.IsDraggable(candidat) == false)
//{
// candidat = e.OriginalSource as UIElement;
// if (CurrentDragSourceAdvisor.IsDraggable(candidat) == false)
// return;
//}
UIElement candidat = e.OriginalSource as UIElement;
if (CurrentDragSourceAdvisor.IsDraggable(candidat) == false)
{
candidat = e.Source as UIElement;
if (CurrentDragSourceAdvisor.IsDraggable(candidat) == false)
return;
}
_draggedElt = candidat;
_dragStartPoint = e.GetPosition(null);
_offsetPoint = e.GetPosition(_draggedElt);
_isMouseDown = true;
}
