private void listBoxItem_QueryContinueDrag(object sender, QueryContinueDragEventArgs e)
{
if (dragGhost != null)
{
var p = NativeMethods.GetNowPosition(this);
var loc = this.PointFromScreen(StoryFrameList.PointToScreen(new Point(0, 0)));
dragGhost.LeftOffset = p.X - loc.X;
dragGhost.TopOffset = p.Y - loc.Y;
}
}
private void listBox_Drop(object sender, DragEventArgs e)
{
var dropPos = e.GetPosition(StoryFrameList);
var lbi = e.Data.GetData(typeof(ListBoxItem)) as ListBoxItem;
var o = lbi.DataContext as IMarkable;
var index = _model.StoryFrameModelCollection.IndexOf(o);
for (int i = 0; i < _model.StoryFrameModelCollection.Count; i++)
{
var item = StoryFrameList.ItemContainerGenerator.ContainerFromIndex(i) as ListBoxItem;
var pos = StoryFrameList.PointFromScreen(item.PointToScreen(new Point(0, item.ActualHeight / 2)));
if (dropPos.Y < pos.Y)
{
// i が入れ換え先のインデックス
_model.MoveCollection(index, (index < i) ? i - 1 : i);
return;
}
}
// 最後にもっていく
int last = _model.StoryFrameModelCollection.Count - 1;
_model.MoveCollection(index, last);
}