示例#1
0
        private void EditNoteModeSlide(ScoreEditorHitTestResult hit, MouseEventArgs e)
        {
            var editor = _visualizer.Editor;

            Note lastNote = null;

            if (editor.HasOneSelectedNote)
            {
                lastNote = editor.GetSelectedNote();
            }
            else if (hit.HitAnyNote && editor.HasSelectedNotes)
            {
                Debug.Print("You can only select one note to create a slide group.");
                return;
            }

            Note thisNote    = null;
            var  isNoteAdded = false;

            if (hit.HitAnyNote)
            {
                // The clicked note is always selected.
                thisNote = hit.Note == _lastMouseDownNote ? hit.Note : null;
            }
            else if (hit.HitBarGridIntersection)
            {
                // If not selected, add a note and select it.
                thisNote    = EditorAddNote(hit);
                isNoteAdded = true;
            }

            // If the user clicked on nothing, then clear all selections.
            if (thisNote == null)
            {
                ClearNoteAndBarSelection();
                editor.Invalidate();
                return;
            }

            // If the user clicked on the same note, just perform the standard note selection.
            if (lastNote == null || lastNote == thisNote)
            {
                thisNote.EditorToggleSelected();
                editor.Invalidate();
                return;
            }

            var relationCreated = false;

            do
            {
                // If the selected note is already a slide note and there is a slide relation between the
                // two notes, then switch selection.
                if (NoteHelper.AreNotesInSlideChain(thisNote, lastNote))
                {
                    // Yep just switch selection. Do nothing in this branch.
                }
                else
                {
                    var errStr = EnsureSlideValid(thisNote, lastNote);
                    if (errStr != null)
                    {
                        if (isNoteAdded)
                        {
                            thisNote.Basic.Bar.RemoveNote(thisNote);
                        }
                        Debug.Print(errStr);
                        break;
                    }

                    // Make slide.
                    var(first, second) = NoteHelper.Split(thisNote, lastNote);
                    NoteHelper.MakeSlide(first, second);
                    _visualizer.InformProjectModified();
                    relationCreated = true;
                }
            } while (false);

            // Now handle a special case: link flick after a slide.
            if (!relationCreated)
            {
                var(first, second) = NoteHelper.Split(thisNote, lastNote);
                if (first.Basic.FinishPosition != second.Basic.FinishPosition)
                {
                    if (first.Helper.IsSlideEnd && second.Helper.IsFlickStart)
                    {
                        NoteHelper.MakeSlideToFlick(first, second);
                        _visualizer.InformProjectModified();
                        relationCreated = true;
                    }
                }
            }

            if (relationCreated)
            {
                thisNote.EditorUnselect();
                lastNote.EditorUnselect();
            }
            else
            {
                lastNote.EditorUnselect();
                thisNote.EditorSelect();
            }

            editor.Invalidate();
        }