private void _listView_MouseUp(object sender, MouseEventArgs e)
{
// if (_mouseDownLocation == default(Point))
// {
// _currentTarget = null;
// _currentDraggingItem = null;
// return;
// }
//
// var mouseDownLocation = _mouseDownLocation;
// _mouseDownLocation = default(Point);
Capture = false;
Debug.WriteLine("MouseUp");
_intentionallyChangingSelection = false;
if (Control.MouseButtons == MouseButtons.Left)
{
return;
}
Cursor = Cursors.Default;
bool notPointingAtOriginalLocation = _listView.GetItemAt(e.X, e.Y) != _currentDraggingItem;
// var horizontalMovement = Math.Abs(mouseDownLocation.X - e.X);
// var verticalMovement = Math.Abs(mouseDownLocation.Y - e.Y);
// bool sufficientDistance = horizontalMovement > _thumbnailImageList.ImageSize.Width
// || verticalMovement > _thumbnailImageList.ImageSize.Height;
if (notPointingAtOriginalLocation && RelocatePageEvent != null && _currentDraggingItem != null)
{
Debug.WriteLine("Re-ordering");
if (_currentTarget == null ||
_currentTarget == _currentDraggingItem) //should never happen, but to be safe
{
_currentTarget = null;
_currentDraggingItem = null;
return;
}
RelocatePageEvent.Raise(new RelocatePageInfo((IPage)_currentDraggingItem.Tag, _currentTarget.Index - _numberofEmptyListItemsAtStart));
_listView.BeginUpdate();
_listView.Items.Remove(_currentDraggingItem);
_listView.Items.Insert(_currentTarget.Index, _currentDraggingItem);
_listView.EndUpdate();
_currentTarget = null;
_currentDraggingItem = null;
UpdateThumbnailCaptions();
_listView.Invalidate();
}
else
{
_currentTarget = null;
_currentDraggingItem = null;
}
}
private void GridReordered(string s)
{
var newSeq = new List <IPage>();
var keys = s.Split(new [] { ',' }, StringSplitOptions.RemoveEmptyEntries);
foreach (var key in keys)
{
IPage page;
if (_pageMap.TryGetValue(key, out page))
{
newSeq.Add(page);
}
}
Debug.Assert(newSeq.Count == _pages.Count);
// Now, which one moved?
int firstDiff = 0;
while (firstDiff < _pages.Count && _pages[firstDiff] == newSeq[firstDiff])
{
firstDiff++;
}
int limDiff = _pages.Count;
while (limDiff > firstDiff && _pages[limDiff - 1] == newSeq[limDiff - 1])
{
limDiff--;
}
if (firstDiff == limDiff)
{
return; // spurious notification somehow? Nothing changed.
}
// We have the subsequence that altered.
// Is the change legal?
for (int i = firstDiff; i < limDiff; i++)
{
if (!_pages[i].CanRelocate)
{
var msg = LocalizationManager.GetString("EditTab.PageList.CantMoveXMatter",
"That change is not allowed. Front matter and back matter pages must remain where they are.");
//previously had a caption that didn't add value, just more translation work
if (_pages[i].Book.LockedDown)
{
msg = LocalizationManager.GetString("PageList.CantMoveWhenTranslating",
"Pages can not be re-ordered when you are translating a book.");
msg = msg + System.Environment.NewLine + EditingView.GetInstructionsForUnlockingBook();
}
MessageBox.Show(msg);
UpdateItems(_pages); // reset to old state
return;
}
}
// There are two possibilities: the user dragged the item that used to be at the start to the end,
// or the item that used to be the end to the start.
IPage movedPage;
int newPageIndex;
if (_pages[firstDiff] == newSeq[limDiff - 1])
{
// Move forward
movedPage = _pages[firstDiff];
newPageIndex = limDiff - 1;
}
else
{
Debug.Assert(_pages[limDiff - 1] == newSeq[firstDiff]); // moved last page forwards
movedPage = _pages[limDiff - 1];
newPageIndex = firstDiff;
}
var relocatePageInfo = new RelocatePageInfo(movedPage, newPageIndex);
RelocatePageEvent.Raise(relocatePageInfo);
if (relocatePageInfo.Cancel)
{
UpdateItems(_pages);
}
else
{
_pages = newSeq;
UpdatePageNumbers();
// This is only needed if left and right pages are styled differently.
// Unfortunately gecko does not re-apply the styles when things are re-ordered!
UpdateItems(_pages);
}
}