/// <summary>
/// Raises the <see cref="E:System.Windows.Forms.Control.DragDrop"/> event.
/// </summary>
/// <param name="e">A <see cref="T:System.Windows.Forms.DragEventArgs"/> that contains the event data. </param>
protected override void OnDragDrop(DragEventArgs e)
{
base.OnDragDrop(e);
Skill dragSkill = GetDraggingSkill(e);
if (dragSkill != null)
{
return;
}
m_dragging = false;
ClearDropMarker();
if (!AllowRowReorder)
{
return;
}
if (SelectedItems.Count == 0)
{
return;
}
Point cp = PointToClient(new Point(e.X, e.Y));
ListViewItem dragToItem = GetItemAt(cp.X, cp.Y);
if (dragToItem == null)
{
return;
}
int dropIndex = dragToItem.Index;
if (dropIndex > SelectedItems[0].Index)
{
dropIndex++;
}
if (ListViewItemsDragging != null)
{
ListViewDragEventArgs args = new ListViewDragEventArgs(SelectedItems[0].Index,
SelectedItems.Count, dropIndex);
ListViewItemsDragging(this, args);
if (args.Cancel)
{
return;
}
}
// Make a copy of all the selected items
ArrayList insertItems = new ArrayList(SelectedItems.Count);
foreach (ListViewItem item in SelectedItems)
{
insertItems.Add(item.Clone());
}
// insert the copied items in reverse order at the drop index so
// they appear in the right order after they've all been inserted
for (int i = insertItems.Count - 1; i >= 0; i--)
{
Items.Insert(dropIndex, (ListViewItem)insertItems[i]);
}
// remove the selected items
foreach (ListViewItem item in SelectedItems)
{
// must clear the items icon index or an exception is thrown when it is removed
item.StateImageIndex = -1;
Items.Remove(item);
}
ListViewItemsDragged?.ThreadSafeInvoke(this, new EventArgs());
// if the item was dragged to the end of the plan.
if (dropIndex >= Items.Count)
{
EnsureVisible(Items.Count - 1);
}
else
{
EnsureVisible(dropIndex);
}
}
/// <summary>
/// Raises the <see cref="E:System.Windows.Forms.Control.DragDrop"/> event.
/// </summary>
/// <param name="e">A <see cref="T:System.Windows.Forms.DragEventArgs"/> that contains the event data. </param>
protected override void OnDragDrop(DragEventArgs e)
{
base.OnDragDrop(e);
Skill dragSkill = GetDraggingSkill(e);
if (dragSkill != null)
return;
m_dragging = false;
ClearDropMarker();
if (!AllowRowReorder)
return;
if (SelectedItems.Count == 0)
return;
Point cp = PointToClient(new Point(e.X, e.Y));
ListViewItem dragToItem = GetItemAt(cp.X, cp.Y);
if (dragToItem == null)
return;
int dropIndex = dragToItem.Index;
if (dropIndex > SelectedItems[0].Index)
dropIndex++;
if (ListViewItemsDragging != null)
{
ListViewDragEventArgs args = new ListViewDragEventArgs(SelectedItems[0].Index,
SelectedItems.Count, dropIndex);
ListViewItemsDragging(this, args);
if (args.Cancel)
return;
}
// Make a copy of all the selected items
ArrayList insertItems = new ArrayList(SelectedItems.Count);
foreach (ListViewItem item in SelectedItems)
{
insertItems.Add(item.Clone());
}
// insert the copied items in reverse order at the drop index so
// they appear in the right order after they've all been inserted
for (int i = insertItems.Count - 1; i >= 0; i--)
{
Items.Insert(dropIndex, (ListViewItem)insertItems[i]);
}
// remove the selected items
foreach (ListViewItem item in SelectedItems)
{
// must clear the items icon index or an exception is thrown when it is removed
item.StateImageIndex = -1;
Items.Remove(item);
}
ListViewItemsDragged?.ThreadSafeInvoke(this, new EventArgs());
// if the item was dragged to the end of the plan.
if (dropIndex >= Items.Count)
EnsureVisible(Items.Count - 1);
else
EnsureVisible(dropIndex);
}