void LineSegment::editDrag(const EditData& ed)
{
// Only for resizing according to the diagonal properties
QPointF deltaResize(ed.delta.x(), line()->diagonal() ? ed.delta.y() : 0.0);
// Only for moving, no y limitaion
QPointF deltaMove(ed.delta.x(), ed.delta.y());
switch(ed.curGrip) {
case GRIP_LINE_START: // Resize the begin of element (left grip)
setUserOff(userOff() + deltaResize);
_userOff2 -= deltaResize;
break;
case GRIP_LINE_END: // Resize the end of element (rigth grip)
_userOff2 += deltaResize;
break;
case GRIP_LINE_MIDDLE: // Move the element (middle grip)
setUserOff(userOff() + deltaMove);
break;
}
if ((line()->anchor() == Spanner::ANCHOR_NOTE)
&& (ed.curGrip == GRIP_LINE_START || ed.curGrip == GRIP_LINE_END)) {
//
// if we touch a different note, change anchor
//
Element* e = ed.view->elementNear(ed.pos);
if (e && e->type() == NOTE) {
SLine* l = line();
if (ed.curGrip == GRIP_LINE_END && e != line()->endElement()) {
qDebug("LineSegment: move end anchor");
Note* noteOld = static_cast<Note*>(l->endElement());
Note* noteNew = static_cast<Note*>(e);
noteOld->removeSpannerBack(l);
noteNew->addSpannerBack(l);
l->setEndElement(noteNew);
_userOff2 += noteOld->canvasPos() - noteNew->canvasPos();
}
else if (ed.curGrip == GRIP_LINE_START && e != l->startElement()) {
qDebug("LineSegment: move start anchor (not impl.)");
}
}
}
line()->layout();
}
bool SLine::is_vertical_to(SLine &other_line, int epsilon)
{
int dot_prod = dot_product(other_line);
if(epsilon)
{
//calculate
double norm1 = norm();
double norm2 = other_line.norm();
double cosfi = dot_prod/norm1/norm2;
double fi = acos(cosfi);
if(std::abs(DEGREE_TO_RAD(90.0)-fi) < epsilon)
return true;
}
else
return static_cast<bool>(std::abs(dot_prod) < 0.000001);
return false;
}
bool SLine::is_parallel_to(SLine &other_line, int epsilon)
{
double dot_prod = static_cast<double>(dot_product(other_line));
if(dot_prod < 0.0000001)
return false;
double norm1 = norm();
double norm2 = other_line.norm();
double cosfi = dot_prod/norm1/norm2;
double fi = acos(cosfi);
double diff = std::abs(DEGREE_TO_RAD(0.0)-fi);
if(epsilon)
{
if(diff < epsilon)
//calculate
return true;
}
else
{
return static_cast<bool>(std::abs(fi) < 0.000001);
}
return false;
}
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;
}
int SLine::dot_product(SLine &other_line)
{
return dx()*other_line.dx()+ dy()*other_line.dy();
}