void PenCommandObject::on_press()
{
m_segment.setId(getSegmentId(m_startSegments));
m_segment.setMinY(0);
m_segment.setMaxY(1);
m_originalPress = m_state->currentPoint;
m_minPress = m_originalPress;
m_maxPress = m_originalPress;
}
void CreatePointCommandObject::createPoint(std::vector<CurveSegmentData> &segments)
{
// Create a point where we clicked
// By creating segments that goes to the closest points if we're in the empty,
// or by splitting a segment if we're in the middle of it.
// 1. Check if we're clicking in a place where there is a segment
CurveSegmentData* middle = nullptr;
CurveSegmentData* exactBefore = nullptr;
CurveSegmentData* exactAfter = nullptr;
for(auto& segment : segments)
{
if(segment.start.x() < m_state->currentPoint.x() && m_state->currentPoint.x() < segment.end.x())
middle = &segment;
if(segment.end.x() == m_state->currentPoint.x())
exactBefore = &segment;
if(segment.start.x() == m_state->currentPoint.x())
exactAfter = &segment;
if(middle && exactBefore && exactAfter)
break;
}
// Handle creation on an exact other point
if(exactBefore || exactAfter)
{
if(exactBefore)
{
exactBefore->end = m_state->currentPoint;
}
if(exactAfter)
{
exactAfter->start = m_state->currentPoint;
}
}
else if(middle)
{
// TODO refactor with MovePointState (line ~330)
// The segment goes in the first half of "middle"
CurveSegmentData newSegment{
getSegmentId(segments),
middle->start, m_state->currentPoint,
middle->previous, middle->id,
middle->type, middle->specificSegmentData
};
auto prev_it = find(segments, middle->previous);
// TODO we shouldn't have to test for this, only test if middle->previous != id{}
if(prev_it != segments.end())
{
(*prev_it).following = newSegment.id;
}
middle->start = m_state->currentPoint;
middle->previous = newSegment.id;
segments.push_back(newSegment);
}
else
{
// ~ Creating in the void ~ ... Spooky!
// This is of *utmost* importance : if we don't do this,
// when we push_back, the pointers get invalidated because the memory
// has been moved, which causes a wealth of uncanny bugs and random memory errors
// in other threads. So we reserve from up front the size we'll need.
segments.reserve(segments.size() + 2);
double seg_closest_from_left_x = 0;
CurveSegmentData* seg_closest_from_left{};
double seg_closest_from_right_x = 1.;
CurveSegmentData* seg_closest_from_right{};
for(CurveSegmentData& segment : segments)
{
auto seg_start_x = segment.start.x();
if(seg_start_x > m_state->currentPoint.x() && seg_start_x < seg_closest_from_right_x)
{
seg_closest_from_right_x = seg_start_x;
seg_closest_from_right = &segment;
}
auto seg_end_x = segment.end.x();
if(seg_end_x < m_state->currentPoint.x() && seg_end_x > seg_closest_from_left_x)
{
seg_closest_from_left_x = seg_end_x;
seg_closest_from_left = &segment;
}
}
// Create a curve segment for the left
// We do this little dance because of id generation.
{
CurveSegmentData newLeftSegment;
newLeftSegment.id = getSegmentId(segments);
segments.push_back(newLeftSegment);
}
CurveSegmentData& newLeftSegment = segments.back();
newLeftSegment.type = PowerCurveSegmentData::key();
newLeftSegment.specificSegmentData = QVariant::fromValue(PowerCurveSegmentData{0});
newLeftSegment.start = {seg_closest_from_left_x, 0.};
newLeftSegment.end = m_state->currentPoint;
{
CurveSegmentData newRightSegment;
newRightSegment.id = getSegmentId(segments);
segments.push_back(newRightSegment);
}
CurveSegmentData& newRightSegment = segments.back();
newRightSegment.type = PowerCurveSegmentData::key();
newRightSegment.specificSegmentData = QVariant::fromValue(PowerCurveSegmentData{0});
newRightSegment.start = m_state->currentPoint;
newRightSegment.end = {seg_closest_from_right_x, 0.};
newLeftSegment.following = newRightSegment.id;
newRightSegment.previous = newLeftSegment.id;
if(seg_closest_from_left)
{
newLeftSegment.start = seg_closest_from_left->end;
newLeftSegment.previous = seg_closest_from_left->id;
seg_closest_from_left->following = newLeftSegment.id;
}
if(seg_closest_from_right)
{
newRightSegment.end = seg_closest_from_right->start;
newRightSegment.following = seg_closest_from_right->id;
seg_closest_from_right->previous = newRightSegment.id;
}
}
}
void PenCommandObject::move()
{
// getSegmentId *has* to be prior to filterSegments for middleBegin /
// middleEnd
auto point_array_id = getSegmentId(m_startSegments);
auto segts_tpl = filterSegments();
auto& middleBegin = std::get<0>(segts_tpl);
auto& middleEnd = std::get<1>(segts_tpl);
auto& segts = std::get<2>(segts_tpl);
auto dat_base = m_segment.toSegmentData();
dat_base.id = point_array_id;
dat_base.start = m_minPress;
dat_base.end = m_maxPress;
segts.reserve(segts.size() + 3);
optional<std::size_t> middle_begin_p{};
optional<std::size_t> middle_end_p{};
if (middleBegin)
{
segts.push_back(*std::move(middleBegin));
middle_begin_p = segts.size() - 1;
}
if (middleEnd)
{
segts.push_back(*std::move(middleEnd));
middle_end_p = segts.size() - 1;
}
segts.push_back(dat_base);
SegmentData& dat = segts.back();
if (middle_begin_p && middle_end_p
&& segts[*middle_begin_p].id == segts[*middle_end_p].id)
{
segts[*middle_end_p].id = getSegmentId(segts);
for (auto& seg : segts)
{
if (seg.id == segts[*middle_end_p].following)
{
seg.previous = segts[*middle_end_p].id;
break;
}
}
}
if (middle_begin_p)
{
SegmentData& seg = segts[*middle_begin_p];
seg.end = m_minPress;
seg.following = dat.id;
dat.previous = seg.id;
}
if (middle_end_p)
{
SegmentData& seg = segts[*middle_end_p];
seg.start = m_maxPress;
seg.previous = dat.id;
dat.following = seg.id;
}
submit(std::move(segts));
}
void PenCommandObject::release_n(seg_tuple&& segts_tpl)
{
m_segment.simplify(100);
auto lin_segments = m_segment.toPowerSegments();
auto& segts = std::get<2>(segts_tpl);
segts.reserve(segts.size() + lin_segments.size() + 3);
optional<std::size_t> middle_begin_p{};
optional<std::size_t> middle_end_p{};
if (auto& middleBegin = std::get<0>(segts_tpl))
{
segts.push_back(*std::move(middleBegin));
middle_begin_p = segts.size() - 1;
}
if (auto& middleEnd = std::get<1>(segts_tpl))
{
segts.push_back(*std::move(middleEnd));
middle_end_p = segts.size() - 1;
}
const std::size_t first_inserted_lin = segts.size();
const std::size_t N = lin_segments.size();
{ // Put the first one
SegmentData& lin = lin_segments[0];
lin.id = getSegmentId(segts);
if (lin_segments.size() > 1)
lin_segments[1].previous = lin.id;
segts.push_back(std::move(lin));
}
if (N > 1)
{
// Main loop
for (std::size_t i = 1; i < N - 1; i++)
{
SegmentData& lin = lin_segments[i];
lin.id = getSegmentId(segts);
segts[first_inserted_lin + i - 1].following = lin.id;
lin_segments[i + 1].previous = lin.id;
segts.push_back(std::move(lin));
}
{ // Put the last one
SegmentData& lin = lin_segments.back();
lin.id = getSegmentId(segts);
segts.back().following = lin.id;
segts.push_back(std::move(lin));
}
}
// Handle the case of the whole drawn curve being
// contained in a single original segment
if (middle_begin_p && middle_end_p
&& segts[*middle_begin_p].id == segts[*middle_end_p].id)
{
auto& mb = segts[*middle_begin_p];
auto& me = segts[*middle_end_p];
me.id = getSegmentId(segts);
for (auto& seg : segts)
{
if (seg.id == mb.following)
{
seg.previous = me.id;
break;
}
}
}
// Link the new segments
auto& first_lin = segts[first_inserted_lin];
if (middle_begin_p)
{
SegmentData& seg = segts[*middle_begin_p];
seg.end = first_lin.start;
seg.following = first_lin.id;
first_lin.previous = seg.id;
}
auto& last_lin = segts.back();
if (middle_end_p)
{
SegmentData& seg = segts[*middle_end_p];
seg.start = last_lin.end;
seg.previous = last_lin.id;
last_lin.following = seg.id;
}
// checkCoherent(segts);
submit(std::move(segts));
m_dispatcher.commit();
m_segment.reset();
}
void MovePointCommandObject::handleCrossOnOverlap(CurveSegmentMap& segments)
{
double current_x = m_state->currentPoint.x();
auto& segments_by_id = segments.get<Segments::Hashed>();
// In this case we merge at the origins of the point and we create if it is in a new place.
// First, if we go to the right.
if(current_x > m_originalPress.x())
{
// Get the segment we're in, if there's any
auto middleSegmentIt = std::find_if(segments_by_id.begin(), segments_by_id.end(),
[&] (const SegmentData& segment)
{ // Going to the right
return
segment.start.x() > m_originalPress.x()
&& segment.start.x() < current_x
&& segment.end.x() > current_x;
});
auto middle = middleSegmentIt != segments_by_id.end()
? &*middleSegmentIt
: nullptr;
// First part : removal of the segments around the initial click
// If we have a following segment and the current position > end of the following segment
if(m_state->clickedPointId.following)
{
auto foll_seg_it = segments_by_id.find(m_state->clickedPointId.following);
auto& foll_seg = *foll_seg_it;
if(current_x > foll_seg.end.x())
{
// If there was also a previous segment, it now goes to the end of the
// presently removed segment.
if(m_state->clickedPointId.previous)
{
auto prev_seg_it = segments_by_id.find(m_state->clickedPointId.previous);
segments_by_id.modify(prev_seg_it, [&] (auto& seg) {
seg.end = foll_seg.end;
seg.following = foll_seg.following;
});
}
else
{
// Link to the previous segment, or to the zero, maybe ?
}
// If the one about to be deleted also had a following, we set its previous
// to the previous of the clicked point
if(foll_seg.following)
{
auto foll_foll_seg_it = segments_by_id.find(foll_seg.following);
segments_by_id.modify(foll_foll_seg_it, [&] (auto& seg) {
seg.previous = m_state->clickedPointId.previous;
});
}
segments_by_id.erase(foll_seg_it);
}
else
{
// We have not crossed a point
setCurrentPoint(segments);
}
}
else
{
// If we have crossed a point (after some "emptiness")
bool crossed = false;
for(const auto& segment : segments)
{
auto seg_start_x = segment.start.x();
if(seg_start_x < current_x && seg_start_x > m_originalPress.x())
{
crossed = true;
break;
}
}
if(crossed)
{
// We remove the previous of the clicked point
auto prev_seg_it = segments_by_id.find(m_state->clickedPointId.previous);
auto& prev_seg = *prev_seg_it;
if(prev_seg.previous)
{
// We set its following to null.
auto prev_prev_seg_it = segments_by_id.find(prev_seg.previous);
segments_by_id.modify(prev_prev_seg_it, [&] (auto& seg) {
seg.following = Id<SegmentModel>{};
});
}
segments_by_id.erase(prev_seg_it);
}
else
{
// We have not crossed a point
setCurrentPoint(segments);
}
}
// Second part : creation of a new segment where the cursor actually is
if(middle)
{
// We insert a new element after the leftmost point from the current point.
// Since we are in a segment we split it and create another with a new id.
SegmentData newSegment{
getSegmentId(segments_by_id),
middle->start, m_state->currentPoint,
middle->previous, middle->id,
middle->type, middle->specificSegmentData
};
auto prev_it = segments_by_id.find(middle->previous);
// TODO we shouldn't have to test for this, only test if middle->previous != id{}
if(prev_it != segments_by_id.end())
{
segments_by_id.modify(prev_it, [&] (auto& seg) {
seg.following = newSegment.id;
});
}
segments_by_id.modify(middleSegmentIt, [&] (auto& seg) {
seg.start = m_state->currentPoint;
seg.previous = newSegment.id;
});
segments.insert(newSegment);
}
else
{
/*
// We're on the empty; we make a new linear segment from the end of the last point
// or zero if there is none ? this can't happen unless we select a point on zero.
double seg_closest_from_left_x = 0;
CurveSegmentModel* seg_closest_from_left{};
for(CurveSegmentModel* segment : segments)
{
auto seg_end_x = segment.end.x();
if(seg_end_x < current_x && seg_end_x > seg_closest_from_left_x)
{
seg_closest_from_left_x = seg_end_x;
seg_closest_from_left = segment;
}
}
auto newSegment = new LinearCurveSegmentModel{getStrongId(segments), nullptr};
newSegment->setEnd(m_state->currentPoint);
if(seg_closest_from_left)
{
newSegment->setStart(seg_closest_from_left->end());
newSegment->setPrevious(seg_closest_from_left->id());
}
segments.append(newSegment);
*/
}
}
else if(current_x < m_originalPress.x())
{
// Get the segment we're in, if there's any
auto middleSegmentIt = std::find_if(segments_by_id.begin(), segments_by_id.end(),
[&] (const auto& segment)
{ // Going to the left
return
segment.end.x() < m_originalPress.x()
&& segment.start.x() < current_x
&& segment.end.x() > current_x;
});
auto middle = middleSegmentIt != segments_by_id.end()
? &*middleSegmentIt
: nullptr;
// First part : removal of the segments around the initial click
// If we have a following segment and the current position > end of the following segment
if(m_state->clickedPointId.previous)
{
auto prev_seg_it = segments_by_id.find(m_state->clickedPointId.previous);
auto& prev_seg = *prev_seg_it;
if(current_x < prev_seg.start.x())
{
// If there was also a following segment to the click, it now goes to the start of the
// presently removed segment.
if(m_state->clickedPointId.following)
{
auto foll_seg_it = segments_by_id.find(m_state->clickedPointId.following);
segments_by_id.modify(foll_seg_it, [&] (auto& seg) {
seg.start = prev_seg.start;
seg.previous = prev_seg.previous;
});
}
else
{
// Link to the following segment, or to the zero, maybe ?
}
// If the one about to be deleted also had a previous, we set its following
// to the following of the clicked point
if(prev_seg.previous)
{
auto prev_prev_seg_it = segments_by_id.find(prev_seg.previous);
segments_by_id.modify(prev_prev_seg_it, [&] (auto& seg) {
seg.following = m_state->clickedPointId.following;
});
}
segments_by_id.erase(prev_seg_it);
}
else
{
// We have not crossed a point
setCurrentPoint(segments);
}
}
else
{
// If we have crossed a point (after some "emptiness")
bool crossed = false;
for(const auto& segment : segments)
{
auto seg_end_x = segment.end.x();
if(seg_end_x > current_x && seg_end_x < m_originalPress.x())
{
crossed = true;
break;
}
}
if(crossed)
{
// We remove the following of the clicked point
auto foll_seg_it = segments_by_id.find(m_state->clickedPointId.following);
auto& foll_seg = *foll_seg_it;
if(foll_seg.following)
{
// We set its following to null.
auto foll_foll_seg_it = segments_by_id.find(foll_seg.following);
segments_by_id.modify(foll_foll_seg_it, [&] (auto& seg) {
seg.previous = Id<SegmentModel>{};
});
}
segments_by_id.erase(foll_seg_it);
}
else
{
// We have not crossed a point
setCurrentPoint(segments);
}
}
// Second part : creation of a new segment where the cursor actually is
if(middle)
{
SegmentData newSegment{
getSegmentId(segments_by_id),
m_state->currentPoint, middle->end,
middle->id, middle->following,
middle->type, middle->specificSegmentData
};
auto foll_it = segments_by_id.find(middle->following);
// TODO we shouldn't have to test for this, only test if middle->previous != id{}
if(foll_it != segments_by_id.end())
{
segments_by_id.modify(foll_it, [&] (auto& seg) {
seg.previous = newSegment.id;
});
}
segments_by_id.modify(middleSegmentIt, [&] (auto& seg) {
seg.end = m_state->currentPoint;
seg.following = newSegment.id;
});
segments_by_id.insert(newSegment);
}
else
{
// TODO (see the commented block on the symmetric part)
}
}
}