bool WaveTrack::HandleClear(double t0, double t1,
bool addCutLines, bool split)
{
if (t1 < t0)
return false;
WaveClipList::Node* it;
WaveClipList clipsToDelete;
WaveClipList clipsToAdd;
for (it=GetClipIterator(); it; it=it->GetNext())
{
WaveClip *clip = it->GetData();
if (t0 <= clip->GetStartTime() && t1 >= clip->GetEndTime())
{
// Whole clip must be deleted - remember this
clipsToDelete.Append(clip);
} else
if (t1 > clip->GetStartTime() && t0 < clip->GetEndTime())
{
// Clip data is affected by command
if (addCutLines)
{
if (!clip->ClearAndAddCutLine(t0,t1))
return false;
} else
{
if (split) {
// Three cases:
if (t0 <= clip->GetStartTime()) {
// Delete from the left edge
clip->Clear(clip->GetStartTime(), t1);
clip->Offset(t1-clip->GetStartTime());
} else
if (t1 >= clip->GetEndTime()) {
// Delete to right edge
clip->Clear(t0, clip->GetEndTime());
} else
{
// Delete in the middle of the clip...we actually create two
// new clips out of the left and right halves...
WaveClip *left = new WaveClip(*clip, mDirManager);
left->Clear(t0, clip->GetEndTime());
clipsToAdd.Append(left);
WaveClip *right = new WaveClip(*clip, mDirManager);
right->Clear(clip->GetStartTime(), t1);
right->Offset(t1-clip->GetStartTime());
clipsToAdd.Append(right);
clipsToDelete.Append(clip);
}
}
else {
if (!clip->Clear(t0,t1))
return false;
}
}
} else
if (clip->GetStartTime() >= t1)
{
// Clip is "behind" the region -- offset it unless we're splitting
if (!split)
clip->Offset(-(t1-t0));
}
}
for (it=clipsToDelete.GetFirst(); it; it=it->GetNext())
{
mClips.DeleteObject(it->GetData());
delete it->GetData();
}
for (it=clipsToAdd.GetFirst(); it; it=it->GetNext())
{
mClips.Append(it->GetData());
}
return true;
}
