private void DisposeComboHandler()
{
if (m_ComboHandler != null)
{
(m_ComboHandler as IDisposable).Dispose();
m_ComboHandler = null;
}
}
/// <summary>
/// Make a combo box appropriate for the specified selection. If fMouseDown is true,
/// do so unconditionally...otherwise (mousemove) only if the new selection is on a different thing.
/// </summary>
/// <param name="vwselNew"></param>
/// <param name="fForce"></param>
private void ShowComboForSelection(IVwSelection vwselNew, bool fMouseDown)
{
// It's a good idea to get this first...it's possible for MakeCombo to leave the selection invalid.
SIL.Utils.Rect loc;
vwselNew.GetParaLocation(out loc);
if (!fMouseDown)
{
// It's a mouse move.
// If we've moved to somewhere outside any paragraph get rid of the combos.
// But, allow somewhere close, since otherwise it's almost impossible to get
// a combo on an empty string.
SIL.Utils.Rect locExpanded = loc;
locExpanded.right += 50;
locExpanded.left -= 5;
locExpanded.top -= 2;
locExpanded.bottom += 2;
if (!locExpanded.Contains(m_LastMouseMovePos))
{
HideCombos();
return;
}
// Don't do anything if the current mouse position is in the same paragraph
// as before. Things tend to flicker if we continually create and remove it.
// But, if we've hidden all the combos, go ahead even if at the same position as before...
// otherwise, when we drag off outside the text and return, we may not get any combo.
if (loc.Equals(m_locLastShowCombo) && FirstLineHandler != null)
{
return;
}
}
FinishUpOk(); // Just like OK, if there are pending edits in the combo, do them.
// Changing a different item may result in changes to this one also. This could invalidate
// the selection, in which case, we can't use it.
// Enhance JohnT: might consider trying the current selection, if any, if called from
// MouseDown...that would not be useful if called from hover. But there probably isn't
// a current selection in that case. Could try a selection at the saved mouse position.
if (!vwselNew.IsValid)
return;
m_locLastShowCombo = loc;
m_fMakingCombo = true;
HideCombos();
// No matter what, we are fixin to get rid of the old value.
DisposeComboHandler();
if (!m_fInMouseDrag)
{
m_ComboHandler = InterlinComboHandler.MakeCombo(m_mediator.HelpTopicProvider,
vwselNew, this, fMouseDown);
}
else
{
m_ComboHandler = null;
}
m_fMakingCombo = false;
m_fLockCombo = false; // nothing typed in it yet.
if (m_ComboHandler != null)
{
// Set the position of the combo and display it. Do this before synchronizing
// the LexEntry display, which can take a while.
m_ComboHandler.Activate(loc);
m_fMouseDownActivatedCombo = true;
// If the selection moved to a different morpheme, and we know a corresponding
// LexEntry, switch to it.
if (m_ComboHandler.SelectedMorphHvo != 0)
{
int hvoSbEntry = m_caches.DataAccess.get_ObjectProp(
m_ComboHandler.SelectedMorphHvo, ktagSbMorphEntry);
if (hvoSbEntry != 0)
{
//SetSelectedEntry(m_caches.RealHvo(hvoSbEntry)); // seems to be buggy.
}
}
}
}
