/// <summary>
/// Raises the <see cref="Control.DragOver"/> event of the list view.
/// </summary>
/// <remarks>
/// This determines the current insertion point of the items being moved. This also
/// causes the insertion line to be drawn.
/// </remarks>
/// <param name="drgevent">A <see cref="DragEventArgs"/> describing the event arguments.</param>
protected override void OnDragOver(DragEventArgs drgevent)
{
base.OnDragOver(drgevent);
if (drgevent.Data.GetDataPresent(typeof(List <ListViewItem>)))
{
Point point = PointToClient(new Point(drgevent.X, drgevent.Y));
ListViewItem lviIndex = GetItemAt(point.X, point.Y);
Int32 intNewIndex = Items.Count - 1;
if (lviIndex != null)
{
lviIndex.EnsureVisible();
intNewIndex = lviIndex.Index;
}
if (intNewIndex != m_intInsertIndex)
{
m_intInsertIndex = intNewIndex;
Invalidate();
}
drgevent.Effect = DragDropEffects.Move;
List <ListViewItem> data = (List <ListViewItem>)drgevent.Data.GetData(typeof(List <ListViewItem>));
ReorderingItemsEventArgs riaEventArgs = new ReorderingItemsEventArgs();
for (Int32 i = data.Count - 1; i >= 0; i--)
{
riaEventArgs.ReorderedListViewItems.Insert(0, new ReorderedItemsEventArgs.ReorderedListViewItem(data[i], data[i].Index, m_intInsertIndex + i));
}
OnItemsReordering(riaEventArgs);
if (riaEventArgs.Cancel)
{
drgevent.Effect = DragDropEffects.None;
}
}
}
/// <summary>
/// Raises the <see cref="ItemsReordering"/> event.
/// </summary>
/// <param name="e">An <see cref="EventArgs"/> describing the event arguments.</param>
protected virtual void OnItemsReordering(ReorderingItemsEventArgs e)
{
ItemsReordering(this, e);
}
/// <summary>
/// Raises the <see cref="Control.DragOver"/> event of the list view.
/// </summary>
/// <remarks>
/// This determines the current insertion point of the items being moved. This also
/// causes the insertion line to be drawn.
/// </remarks>
/// <param name="drgevent">A <see cref="DragEventArgs"/> describing the event arguments.</param>
protected override void OnDragOver(DragEventArgs drgevent)
{
base.OnDragOver(drgevent);
if (drgevent.Data.GetDataPresent(typeof(List<ListViewItem>)))
{
Point point = PointToClient(new Point(drgevent.X, drgevent.Y));
ListViewItem lviIndex = GetItemAt(point.X, point.Y);
Int32 intNewIndex = Items.Count - 1;
if (lviIndex != null)
{
lviIndex.EnsureVisible();
intNewIndex = lviIndex.Index;
}
if (intNewIndex != m_intInsertIndex)
{
m_intInsertIndex = intNewIndex;
Invalidate();
}
drgevent.Effect = DragDropEffects.Move;
List<ListViewItem> data = (List<ListViewItem>)drgevent.Data.GetData(typeof(List<ListViewItem>));
ReorderingItemsEventArgs riaEventArgs = new ReorderingItemsEventArgs();
for (Int32 i = data.Count - 1; i >= 0; i--)
riaEventArgs.ReorderedListViewItems.Insert(0, new ReorderedItemsEventArgs.ReorderedListViewItem(data[i], data[i].Index, m_intInsertIndex + i));
OnItemsReordering(riaEventArgs);
if (riaEventArgs.Cancel)
drgevent.Effect = DragDropEffects.None;
}
}
/// <summary>
/// Raises the <see cref="ItemsReordering"/> event.
/// </summary>
/// <param name="e">An <see cref="EventArgs"/> describing the event arguments.</param>
protected virtual void OnItemsReordering(ReorderingItemsEventArgs e)
{
ItemsReordering(this, e);
}
/// <summary>
/// Handles the <see cref="ReorderableListView.ItemsReordering"/> event of the plugin list.
/// </summary>
/// <remarks>
/// This makes sure the new order is going to be valid. If not, the reordering event is stopped.
/// </remarks>
/// <param name="sender">The object that raised the event.</param>
/// <param name="e">A <see cref="ReorderingItemsEventArgs"/> describing the event arguments.</param>
private void rlvPlugins_ItemsReordering(object sender, ReorderingItemsEventArgs e)
{
List<Plugin> lstNewOrder = new List<Plugin>(ViewModel.ManagedPlugins);
foreach (ReorderedItemsEventArgs.ReorderedListViewItem lviPlugin in e.ReorderedListViewItems)
{
Plugin plgMoved = (Plugin)lviPlugin.Item.Tag;
lstNewOrder.RemoveAt(lviPlugin.OldIndex);
lstNewOrder.Insert(lviPlugin.NewIndex, plgMoved);
}
e.Cancel = !ViewModel.ValidatePluginOrder(lstNewOrder);
}
