void lvwGraphs_DragEnter(object sender, DragEventArgs e)
{
if ((e.AllowedEffect & DragDropEffects.Copy) != 0 || (e.AllowedEffect & DragDropEffects.Move) != 0)
{
if (e.Data.GetDataPresent(typeof(CopyMoveDragInfo)))
{
//Cannot Copy/Move if a read-only manager is the target
if (this._manager.IsReadOnly)
{
return;
}
CopyMoveDragInfo info = e.Data.GetData(typeof(CopyMoveDragInfo)) as CopyMoveDragInfo;
if (info == null)
{
return;
}
DragDropEffects effects = DragDropEffects.Copy;
if (info.Source.DeleteSupported)
{
effects = effects | DragDropEffects.Move; //Move only possible if the source manager supports DeleteGraph()
}
e.Effect = effects;
}
}
}
void lvwGraphs_ItemDrag(object sender, ItemDragEventArgs e)
{
if (this.lvwGraphs.SelectedItems.Count > 0)
{
String graphUri = this.lvwGraphs.SelectedItems[0].Text;
CopyMoveDragInfo info = new CopyMoveDragInfo(this, graphUri);
DragDropEffects effects = DragDropEffects.Copy;
if (this._manager.DeleteSupported)
{
effects = effects | DragDropEffects.Move; //Move only possible if this manager supports DeleteGraph()
}
this.lvwGraphs.DoDragDrop(info, effects);
}
}
void lvwGraphs_DragDrop(object sender, DragEventArgs e)
{
if ((e.AllowedEffect & DragDropEffects.Copy) != 0 || (e.AllowedEffect & DragDropEffects.Move) != 0)
{
if (e.Data.GetDataPresent(typeof(CopyMoveDragInfo)))
{
CopyMoveDragInfo info = e.Data.GetData(typeof(CopyMoveDragInfo)) as CopyMoveDragInfo;
if (info == null)
{
return;
}
//Check whether Move is permitted?
if ((e.Effect & DragDropEffects.Move) != 0)
{
CopyMoveDialogue copyMoveConfirm = new CopyMoveDialogue(info, this._manager);
if (copyMoveConfirm.ShowDialog() == DialogResult.OK)
{
if (copyMoveConfirm.IsMove)
{
info.Form.MoveGraph(info.SourceUri, this._manager);
}
else if (copyMoveConfirm.IsCopy)
{
info.Form.CopyGraph(info.SourceUri, this._manager);
}
}
}
else
{
//Just do a Copy
info.Form.CopyGraph(info.SourceUri, this._manager);
}
}
}
}
public CopyMoveDialogue(CopyMoveDragInfo info, Connection target)
{
InitializeComponent();
this.lblConfirm.Text = String.Format(this.lblConfirm.Text, info.SourceUri, info.Source, target);
}
public CopyMoveDialogue(CopyMoveDragInfo info, IStorageProvider target)
{
InitializeComponent();
this.lblConfirm.Text = String.Format(this.lblConfirm.Text, info.SourceUri, info.Source.ToString(), target.ToString());
}
