private void MultiSelectClickHandler(LabeledThumbnail clickedThumbnail)
{
if (MouseButtons != MouseButtons.Left &&
MouseButtons != MouseButtons.Right) return;
// for right click, if selection > 1, the context menu should appear with selection
// remained, else we should change the focus. Specially, when selection > 1, some of
// the options in the context menu serves for the clicked item, such as rename.
if (MouseButtons == MouseButtons.Right)
{
if (_selectedThumbnail.Count > 1 &&
_selectedThumbnail.Contains(clickedThumbnail))
{
_selectedThumbnail.Remove(clickedThumbnail);
_selectedThumbnail.Insert(0, clickedThumbnail);
return;
}
}
// if Ctrl key is not holding, i.e. not doing multi-selecting, all highlighed
// thumbnail should be dehighlighted
if (!ModifierKeys.HasFlag(Keys.Control))
{
foreach (var thumbnail in _selectedThumbnail)
{
thumbnail.DeHighlight();
}
_selectedThumbnail.Clear();
}
if (!_selectedThumbnail.Contains(clickedThumbnail))
{
// highlight the thumbnail and add the clicked thumbnail to the collection
clickedThumbnail.Highlight();
_selectedThumbnail.Insert(0, clickedThumbnail);
FocusSelected();
}
else
{
// turn off the highlighting if the clicked thumbnail is currently highlighted
if (ModifierKeys.HasFlag(Keys.Control))
{
clickedThumbnail.DeHighlight();
_clickOnSelected = false;
_selectedThumbnail.Remove(clickedThumbnail);
}
}
}
private void FirstClickOnThumbnail(LabeledThumbnail clickedThumbnail)
{
if (_selectedThumbnail == null) return;
if (_selectedThumbnail.Count != 0)
{
// this flag doesn't apply for multi selection, thus turn off
_clickOnSelected = false;
// common part, end editing
if (_selectedThumbnail[0].State == LabeledThumbnail.Status.Editing)
{
_selectedThumbnail[0].FinishNameEdit();
}
else
if (_selectedThumbnail[0] == clickedThumbnail)
{
_clickOnSelected = true;
}
MultiSelectClickHandler(clickedThumbnail);
}
else
{
clickedThumbnail.Highlight();
_selectedThumbnail.Insert(0, clickedThumbnail);
FocusSelected();
}
}