CurveEditorItem::CurveEditorItem(QQuickItem* parent)
: QQuickPaintedItem(parent)
, d(new Private(this))
{
setFlag(QQuickItem::ItemHasContents, true);
setAcceptedMouseButtons( Qt::LeftButton | Qt::RightButton | Qt::MidButton );
connect(d->curveWidget, SIGNAL(pointSelectedChanged()), SIGNAL(pointSelectedChanged()));
connect(d->curveWidget, SIGNAL(modified()), SIGNAL(curveChanged()));
qRegisterMetaType<KisCubicCurve>();
}
void KisCurveWidget::inOutChanged(int)
{
QPointF pt;
Q_ASSERT(d->m_grab_point_index >= 0);
pt.setX(d->io2sp(d->m_intIn->value()));
pt.setY(d->io2sp(d->m_intOut->value()));
if (d->jumpOverExistingPoints(pt, d->m_grab_point_index)) {
d->m_curve.setPoint(d->m_grab_point_index, pt);
d->m_grab_point_index = d->m_curve.points().indexOf(pt);
emit pointSelectedChanged();
} else
pt = d->m_curve.points()[d->m_grab_point_index];
d->m_intIn->blockSignals(true);
d->m_intOut->blockSignals(true);
d->m_intIn->setValue(d->sp2io(pt.x()));
d->m_intOut->setValue(d->sp2io(pt.y()));
d->m_intIn->blockSignals(false);
d->m_intOut->blockSignals(false);
d->setCurveModified();
}
void KisCurveWidget::setCurve(KisCubicCurve inlist)
{
d->m_curve = inlist;
d->m_grab_point_index = qBound(0, d->m_grab_point_index, d->m_curve.points().count() - 1);
emit pointSelectedChanged();
d->setCurveModified();
}
void KisCurveWidget::reset(void)
{
d->m_grab_point_index = -1;
emit pointSelectedChanged();
d->m_guideVisible = false;
d->setCurveModified();
}
void KisCurveWidget::addPointInTheMiddle()
{
QPointF pt(0.5, d->m_curve.value(0.5));
if (!d->jumpOverExistingPoints(pt, -1))
return;
d->m_grab_point_index = d->m_curve.addPoint(pt);
emit pointSelectedChanged();
if (d->m_intIn)
d->m_intIn->setFocus(Qt::TabFocusReason);
d->setCurveModified();
}
void KisCurveWidget::mousePressEvent(QMouseEvent * e)
{
if (d->m_readOnlyMode) return;
if (e->button() != Qt::LeftButton)
return;
double x = e->pos().x() / (double)(width() - 1);
double y = 1.0 - e->pos().y() / (double)(height() - 1);
int closest_point_index = d->nearestPointInRange(QPointF(x, y), width(), height());
if (closest_point_index < 0) {
QPointF newPoint(x, y);
if (!d->jumpOverExistingPoints(newPoint, -1))
return;
d->m_grab_point_index = d->m_curve.addPoint(newPoint);
emit pointSelectedChanged();
} else {
d->m_grab_point_index = closest_point_index;
emit pointSelectedChanged();
}
d->m_grabOriginalX = d->m_curve.points()[d->m_grab_point_index].x();
d->m_grabOriginalY = d->m_curve.points()[d->m_grab_point_index].y();
d->m_grabOffsetX = d->m_curve.points()[d->m_grab_point_index].x() - x;
d->m_grabOffsetY = d->m_curve.points()[d->m_grab_point_index].y() - y;
d->m_curve.setPoint(d->m_grab_point_index, QPointF(x + d->m_grabOffsetX, y + d->m_grabOffsetY));
d->m_draggedAwayPointIndex = -1;
d->setState(ST_DRAG);
d->setCurveModified();
}
void KisCurveWidget::keyPressEvent(QKeyEvent *e)
{
if (e->key() == Qt::Key_Delete || e->key() == Qt::Key_Backspace) {
if (d->m_grab_point_index > 0 && d->m_grab_point_index < d->m_curve.points().count() - 1) {
//x() find closest point to get focus afterwards
double grab_point_x = d->m_curve.points()[d->m_grab_point_index].x();
int left_of_grab_point_index = d->m_grab_point_index - 1;
int right_of_grab_point_index = d->m_grab_point_index + 1;
int new_grab_point_index;
if (fabs(d->m_curve.points()[left_of_grab_point_index].x() - grab_point_x) <
fabs(d->m_curve.points()[right_of_grab_point_index].x() - grab_point_x)) {
new_grab_point_index = left_of_grab_point_index;
} else {
new_grab_point_index = d->m_grab_point_index;
}
d->m_curve.removePoint(d->m_grab_point_index);
d->m_grab_point_index = new_grab_point_index;
emit pointSelectedChanged();
setCursor(Qt::ArrowCursor);
d->setState(ST_NORMAL);
}
e->accept();
d->setCurveModified();
} else if (e->key() == Qt::Key_Escape && d->state() != ST_NORMAL) {
d->m_curve.setPoint(d->m_grab_point_index, QPointF(d->m_grabOriginalX, d->m_grabOriginalY) );
setCursor(Qt::ArrowCursor);
d->setState(ST_NORMAL);
e->accept();
d->setCurveModified();
} else if ((e->key() == Qt::Key_A || e->key() == Qt::Key_Insert) && d->state() == ST_NORMAL) {
/* FIXME: Lets user choose the hotkeys */
addPointInTheMiddle();
e->accept();
} else
QWidget::keyPressEvent(e);
}
void KisCurveWidget::mouseMoveEvent(QMouseEvent * e)
{
if (d->m_readOnlyMode) return;
double x = e->pos().x() / (double)(width() - 1);
double y = 1.0 - e->pos().y() / (double)(height() - 1);
if (d->state() == ST_NORMAL) { // If no point is selected set the cursor shape if on top
int nearestPointIndex = d->nearestPointInRange(QPointF(x, y), width(), height());
if (nearestPointIndex < 0)
setCursor(Qt::ArrowCursor);
else
setCursor(Qt::CrossCursor);
} else { // Else, drag the selected point
bool crossedHoriz = e->pos().x() - width() > MOUSE_AWAY_THRES ||
e->pos().x() < -MOUSE_AWAY_THRES;
bool crossedVert = e->pos().y() - height() > MOUSE_AWAY_THRES ||
e->pos().y() < -MOUSE_AWAY_THRES;
bool removePoint = (crossedHoriz || crossedVert);
if (!removePoint && d->m_draggedAwayPointIndex >= 0) {
// point is no longer dragged away so reinsert it
QPointF newPoint(d->m_draggedAwayPoint);
d->m_grab_point_index = d->m_curve.addPoint(newPoint);
d->m_draggedAwayPointIndex = -1;
}
if (removePoint &&
(d->m_draggedAwayPointIndex >= 0))
return;
setCursor(Qt::CrossCursor);
x += d->m_grabOffsetX;
y += d->m_grabOffsetY;
double leftX;
double rightX;
if (d->m_grab_point_index == 0) {
leftX = 0.0;
if (d->m_curve.points().count() > 1)
rightX = d->m_curve.points()[d->m_grab_point_index + 1].x() - POINT_AREA;
else
rightX = 1.0;
} else if (d->m_grab_point_index == d->m_curve.points().count() - 1) {
leftX = d->m_curve.points()[d->m_grab_point_index - 1].x() + POINT_AREA;
rightX = 1.0;
} else {
Q_ASSERT(d->m_grab_point_index > 0 && d->m_grab_point_index < d->m_curve.points().count() - 1);
// the 1E-4 addition so we can grab the dot later.
leftX = d->m_curve.points()[d->m_grab_point_index - 1].x() + POINT_AREA;
rightX = d->m_curve.points()[d->m_grab_point_index + 1].x() - POINT_AREA;
}
x = bounds(x, leftX, rightX);
y = bounds(y, 0., 1.);
d->m_curve.setPoint(d->m_grab_point_index, QPointF(x, y));
if (removePoint && d->m_curve.points().count() > 2) {
d->m_draggedAwayPoint = d->m_curve.points()[d->m_grab_point_index];
d->m_draggedAwayPointIndex = d->m_grab_point_index;
d->m_curve.removePoint(d->m_grab_point_index);
d->m_grab_point_index = bounds(d->m_grab_point_index, 0, d->m_curve.points().count() - 1);
emit pointSelectedChanged();
}
d->setCurveModified();
}
}