protected override void OnDragEnter(DragEventArgs e)
{
base.OnDragEnter(e);
try
{
if (!CanFocus)
{
e.Effect = DragDropEffects.None;
return;
}
var ddw = new DragDataWrapper(e.Data);
var allowOpen = false;
if (ddw.IsFileDrop)
{
var uri = new Uri(Path.GetFullPath(ddw.GetFilePath()));
allowOpen = CanExecute(CommandOpenUri, uri);
}
else if (ddw.IsLinkDrop)
{
var uri = new Uri(ddw.GetLinkUri());
allowOpen = CanExecute(CommandOpenUri, uri);
}
e.Effect = allowOpen ? DragDropEffects.Link : DragDropEffects.None;
}
catch (Exception ex)
{
Logger.Error(ex);
}
}
private static void Drag_LeftMouseDownEventHandler(object sender, MouseButtonEventArgs e)
{
PickupItem item = sender as PickupItem;
ModelItem m = item.Content as ModelItem;
if (m == null)
{
return;
}
m = new ModelItem(m.Type);
// wrap data
DragDataWrapper data = new DragDataWrapper(m, DragOperationType.Create);
data.DragStartPosition = e.GetPosition(item);
DragDrop.DoDragDrop(m, data, DragDropEffects.Copy);
}
protected override void OnDragDrop(DragEventArgs e)
{
base.OnDragDrop(e);
try
{
if (!CanFocus)
{
return;
}
var ddw = new DragDataWrapper(e.Data);
if (ddw.IsFileDrop)
{
var uri = new Uri(Path.GetFullPath(ddw.GetFilePath()));
this.Activate();
this.BeginInvoke(new Action(() => OnCommand(CommandOpenUri, uri)));
//string fileName = ddw.GetFilePath();
//if (fileName != string.Empty)
//{
// this.Activate();
// this.BeginInvoke(new OpenFileHandler(OpenFile), fileName, true);
//}
}
else if (ddw.IsLinkDrop)
{
var uri = new Uri(ddw.GetLinkUri());
this.Activate();
this.BeginInvoke(new Action(() => OnCommand(CommandOpenUri, uri)));
//string linkUrl = ddw.GetLinkUri();
//if (linkUrl != string.Empty)
//{
// Uri fileUri = new Uri(linkUrl);
// this.Activate();
// this.BeginInvoke(new OpenUriHandler(OpenUri), fileUri);
//}
}
}
catch (Exception ex)
{
Logger.Error(ex);
}
}
private static void DragOverEventHandler(object sender, DragEventArgs e)
{
DragDataWrapper data = e.Data.GetData(typeof(DragDataWrapper)) as DragDataWrapper;
ModelItem m = data.Content as ModelItem;
Canvas c = sender as Canvas;
Diagram d = Project.Current.Children.FindByCanvas(c);
// get relative position
Point p = e.GetPosition(c);
UpdateMousePos(c, p);
switch (data.Type)
{
case DragOperationType.Create:
case DragOperationType.Move:
m.Position = new Point(p.X - data.DragStartPosition.X, p.Y - data.DragStartPosition.Y);
#if DEBUG_ON
// test value
System.Console.WriteLine("{0} Drag over canvas", System.DateTime.Now.Millisecond);
#endif
break;
}
}
// drag leave (remove object?)
private static void DragLeaveEventHandler(object sender, DragEventArgs e)
{
DragDataWrapper data = e.Data.GetData(typeof(DragDataWrapper)) as DragDataWrapper;
ModelItem m = data.Content as ModelItem;
Canvas c = sender as Canvas;
Diagram d = Project.Current.Children.FindByCanvas(c);
if (m == null || d == null)
{
return;
}
switch (data.Type)
{
case DragOperationType.Create:
d.Children.Remove(m.ContentObject);
#if DEBUG_ON
// test value
System.Console.WriteLine("{0} Dragging leave canvas", System.DateTime.Now.Millisecond);
#endif
break;
}
}
