bool NoteTrack::HandleXMLTag(const wxChar *tag, const wxChar **attrs)
{
if (!wxStrcmp(tag, wxT("notetrack"))) {
while (*attrs) {
const wxChar *attr = *attrs++;
const wxChar *value = *attrs++;
if (!value)
break;
const wxString strValue = value;
long nValue;
double dblValue;
if (!wxStrcmp(attr, wxT("name")) && XMLValueChecker::IsGoodString(strValue))
mName = strValue;
else if (!wxStrcmp(attr, wxT("offset")) &&
XMLValueChecker::IsGoodString(strValue) &&
Internat::CompatibleToDouble(strValue, &dblValue))
SetOffset(dblValue);
else if (!wxStrcmp(attr, wxT("visiblechannels"))) {
if (!XMLValueChecker::IsGoodInt(strValue) ||
!strValue.ToLong(&nValue) ||
!XMLValueChecker::IsValidVisibleChannels(nValue))
return false;
mVisibleChannels = nValue;
}
else if (!wxStrcmp(attr, wxT("height")) &&
XMLValueChecker::IsGoodInt(strValue) && strValue.ToLong(&nValue))
mHeight = nValue;
else if (!wxStrcmp(attr, wxT("minimized")) &&
XMLValueChecker::IsGoodInt(strValue) && strValue.ToLong(&nValue))
mMinimized = (nValue != 0);
else if (!wxStrcmp(attr, wxT("isSelected")) &&
XMLValueChecker::IsGoodInt(strValue) && strValue.ToLong(&nValue))
this->SetSelected(nValue != 0);
#ifdef EXPERIMENTAL_MIDI_OUT
else if (!wxStrcmp(attr, wxT("velocity")) &&
XMLValueChecker::IsGoodString(strValue) &&
Internat::CompatibleToDouble(strValue, &dblValue))
mGain = (float) dblValue;
#endif
else if (!wxStrcmp(attr, wxT("bottomnote")) &&
XMLValueChecker::IsGoodInt(strValue) && strValue.ToLong(&nValue))
SetBottomNote(nValue);
else if (!wxStrcmp(attr, wxT("data"))) {
std::string s(strValue.mb_str(wxConvUTF8));
std::istringstream data(s);
mSeq = new Alg_seq(data, false);
}
} // while
return true;
}
return false;
}
// Zoom the note track, centering the pitch at centerY,
// amount is 1 for zoom in, and -1 for zoom out
void NoteTrack::Zoom(int centerY, int amount)
{
// Construct track rectangle to map pitch to screen coordinates
// Only y and height are needed:
wxRect trackRect(0, GetY(), 1, GetHeight());
PrepareIPitchToY(trackRect);
int centerPitch = YToIPitch(centerY);
// zoom out by changing the pitch height -- a small integer
mPitchHeight += amount;
if (mPitchHeight <= 0) mPitchHeight = 1;
PrepareIPitchToY(trackRect); // update because mPitchHeight changed
int newCenterPitch = YToIPitch(GetY() + GetHeight() / 2);
// center the pitch that the user clicked on
SetBottomNote(mBottomNote + (centerPitch - newCenterPitch));
}
Track::Holder NoteTrack::Duplicate() const
{
auto duplicate = std::make_unique<NoteTrack>(mDirManager);
duplicate->Init(*this);
// Duplicate on NoteTrack moves data from mSeq to mSerializationBuffer
// and from mSerializationBuffer to mSeq on alternate calls. Duplicate
// to the undo stack and Duplicate back to the project should result
// in serialized blobs on the undo stack and traversable data in the
// project object.
if (mSeq) {
SonifyBeginSerialize();
assert(!mSerializationBuffer);
// serialize from this to duplicate's mSerializationBuffer
mSeq->serialize((void**)&duplicate->mSerializationBuffer,
&duplicate->mSerializationLength);
SonifyEndSerialize();
} else if (mSerializationBuffer) {
SonifyBeginUnserialize();
assert(!mSeq);
Alg_track_ptr alg_track = Alg_seq::unserialize(mSerializationBuffer,
mSerializationLength);
assert(alg_track->get_type() == 's');
duplicate->mSeq = (Alg_seq_ptr) alg_track;
SonifyEndUnserialize();
} else assert(false); // bug if neither mSeq nor mSerializationBuffer
// copy some other fields here
duplicate->SetBottomNote(mBottomNote);
duplicate->SetPitchHeight(mPitchHeight);
duplicate->mLastMidiPosition = mLastMidiPosition;
duplicate->mVisibleChannels = mVisibleChannels;
duplicate->SetOffset(GetOffset());
#ifdef EXPERIMENTAL_MIDI_OUT
duplicate->SetGain(GetGain());
#endif
return std::move(duplicate);
}
void NoteTrack::VScroll(int start, int end)
{
int ph = GetPitchHeight();
int delta = ((end - start) + ph / 2) / ph;
SetBottomNote(mStartBottomNote + delta);
}
