bool LineSegment::edit(MuseScoreView* sv, int curGrip, int key, Qt::KeyboardModifiers modifiers, const QString&)
{
if (!((modifiers & Qt::ShiftModifier)
&& ((subtype() == SEGMENT_SINGLE)
|| (subtype() == SEGMENT_BEGIN && curGrip == GRIP_LINE_START)
|| (subtype() == SEGMENT_END && curGrip == GRIP_LINE_END))))
return false;
LineSegment* ls = 0;
SLine* l = line();
bool bspDirty = false;
SpannerSegmentType st = subtype();
int track = l->track();
if (l->anchor() == ANCHOR_SEGMENT) {
Segment* s1 = static_cast<Segment*>(l->startElement());
Segment* s2 = static_cast<Segment*>(l->endElement());
bool removeSegment = false;
if (key == Qt::Key_Left) {
if (curGrip == GRIP_LINE_START) {
s1 = prevSeg1(s1, track);
}
else if (curGrip == GRIP_LINE_END) {
s2 = prevSeg1(s2, track);
if (s2
&& (s2->system()->firstMeasure() == s2->measure())
&& (s2->tick() == s2->measure()->tick())) {
removeSegment = true;
}
}
}
else if (key == Qt::Key_Right) {
if (curGrip == GRIP_LINE_START)
s1 = nextSeg1(s1, track);
else if (curGrip == GRIP_LINE_END) {
if ((s2->system()->firstMeasure() == s2->measure())
&& (s2->tick() == s2->measure()->tick()))
bspDirty = true;
s2 = nextSeg1(s2, track);
}
}
if (s1 == 0 || s2 == 0 || s1->tick() >= s2->tick())
return true;
if (l->startElement() != s1) {
if (s1->system() != (static_cast<Segment*>(l->startElement())->system())) {
bspDirty = true;
if (key == Qt::Key_Right)
ls = l->takeFirstSegment();
}
static_cast<Segment*>(l->startElement())->remove(l);
l->setStartElement(s1);
s1->add(l);
}
else if (l->endElement() != s2) {
if (removeSegment) {
bspDirty = true;
if (key == Qt::Key_Left)
ls = l->takeLastSegment();
}
static_cast<Segment*>(l->endElement())->removeSpannerBack(l);
l->setEndElement(s2);
s2->addSpannerBack(l);
}
}
else {
Measure* m1 = static_cast<Measure*>(l->startElement());
Measure* m2 = static_cast<Measure*>(l->endElement());
bool removeSegment = false;
if (key == Qt::Key_Left) {
if (curGrip == GRIP_LINE_START) {
if (m1->prevMeasure())
m1 = m1->prevMeasure();
}
else if (curGrip == GRIP_LINE_END) {
if (m2 && (m2->system()->firstMeasure() == m2))
removeSegment = true;
Measure* m = m2->prevMeasure();
if (m)
m2 = m;
}
}
else if (key == Qt::Key_Right) {
if (curGrip == GRIP_LINE_START) {
if (m1->nextMeasure())
m1 = m1->nextMeasure();
}
else if (curGrip == GRIP_LINE_END) {
if (m2->nextMeasure())
m2 = m2->nextMeasure();
if (m2->system()->firstMeasure() == m2)
bspDirty = true;
}
}
if (m1->tick() > m2->tick())
return true;
if (l->startElement() != m1) {
if (m1->system() != (static_cast<Measure*>(l->startElement())->system())) {
bspDirty = true;
if (key == Qt::Key_Right)
ls = l->takeFirstSegment();
}
l->startElement()->remove(l);
l->setStartElement(m1);
m1->add(l);
}
else if (l->endElement() != m2) {
if (removeSegment) {
bspDirty = true;
if (key == Qt::Key_Left)
ls = l->takeLastSegment();
}
static_cast<Measure*>(l->endElement())->removeSpannerBack(l);
l->setEndElement(m2);
m2->addSpannerBack(l);
}
}
l->layout();
LineSegment* nls = 0;
if (st == SEGMENT_SINGLE) {
if (curGrip == GRIP_LINE_START)
nls = l->frontSegment();
else if (curGrip == GRIP_LINE_END)
nls = l->backSegment();
}
else if (st == SEGMENT_BEGIN)
nls = l->frontSegment();
else if (st == SEGMENT_END)
nls = l->backSegment();
if (nls && (nls != this))
sv->changeEditElement(nls);
if (bspDirty)
_score->rebuildBspTree();
if (ls)
_score->undoRemoveElement(ls);
return true;
}
