void GradientLine::mouseMoveEvent(QMouseEvent *event)
{
if (m_dragActive) {
event->accept();
int pos = qreal((width() - 20)) * m_stops.at(currentColorIndex()) + 8;
m_dragOff = false;
int xDistance = event->pos().x() - pos;
qreal distance = qreal(xDistance) / qreal((width() - 20));
qreal newStopPosition = m_stops.at(currentColorIndex()) + distance;
if (newStopPosition > 0.98) //snap to 1
newStopPosition = 1;
if (newStopPosition < 0.02) //snap to 0
newStopPosition = 0;
if ((newStopPosition >=0) && (newStopPosition <= 1))
m_stops[currentColorIndex()] = newStopPosition;
m_yOffset += event->pos().y() - 14;
if (m_yOffset > 0)
m_yOffset = 0;
else if ((m_yOffset < - 10))
m_yOffset = -10;
update();
}
}
void GradientLine::setActiveColor(const QColor &newColor)
{
if (newColor.name() == m_activeColor.name() && newColor.alpha() == m_activeColor.alpha())
return;
m_activeColor = newColor;
m_colorList.removeAt(currentColorIndex());
m_colorList.insert(currentColorIndex(), m_activeColor);
updateGradient();
update();
}
void GradientLine::keyPressEvent(QKeyEvent * event)
{
if (event->matches(QKeySequence::Delete)) {
if ((currentColorIndex()) != 0 && (currentColorIndex() < m_stops.size() - 1)) {
m_dragActive = false;
m_stops.removeAt(currentColorIndex());
m_colorList.removeAt(currentColorIndex());
updateGradient();
setCurrentIndex(0);
//delete item
}
} else {
QWidget::keyPressEvent(event);
}
}
void GradientLine::mouseReleaseEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton) {
event->accept();
if (m_dragActive) {
m_yOffset += event->pos().y() - 14;
if (m_yOffset > 0) {
m_yOffset = 0;
} else if ((m_yOffset < - 8) && (currentColorIndex()) != 0 && (currentColorIndex() < m_stops.size() - 1)) {
m_yOffset = 0;
m_dragActive = false;
m_stops.removeAt(currentColorIndex());
m_colorList.removeAt(currentColorIndex());
updateGradient();
emit gradientChanged();
setCurrentIndex(0);
//delete item
}
}
if (m_dragActive == false && m_create) {
qreal stopPos = qreal(event->pos().x() - 9) / qreal((width() - 15));
int index = -1;
for (int i =0; i < m_stops.size() - 1; i++) {
if ((stopPos > m_stops.at(i)) && (index == -1))
index = i +1;
}
if (index != -1 && (m_useGradient) && abs(m_dragStart.x() - event->pos().x()) < 10) { //creating of items only in base state
m_stops.insert(index, stopPos);
m_colorList.insert(index, QColor(Qt::white));
setCurrentIndex(index);
}
}
}
m_dragActive = false;
m_yOffset = 0;
updateGradient();
emit gradientChanged();
update();
setFocus(Qt::MouseFocusReason);
}
void GradientLine::paintEvent(QPaintEvent *event)
{
QWidget::paintEvent(event);
QPainter p(this);
if (!isEnabled()) {
p.setBrush(Qt::NoBrush);
p.setPen(QColor(0x444444));
p.drawRect(9, 31, width() - 14, height() - 32);
p.drawTiledPixmap(10, 32, width() - 16, height() - 34, tilePixMap(8));
} else {
QLinearGradient linearGradient(QPointF(0, 0), QPointF(width(), 0));
for (int i =0; i < m_stops.size(); i++)
linearGradient.setColorAt(m_stops.at(i), m_colorList.at(i));
p.setBrush(Qt::NoBrush);
p.setPen(QColor(0x444444));
p.drawRect(9, 31, width() - 14, height() - 32);
p.drawTiledPixmap(9, 31, width() - 16, height() - 34, tilePixMap(8));
p.setBrush(linearGradient);
p.setPen(QColor(0x222222));
p.drawRect(8, 30, width() - 14, height() - 32);
p.setPen(QColor(255, 255, 255, 40));
p.drawRect(9, 31, width() - 16, height() - 34);
p.setPen(Qt::black);
for (int i =0; i < m_colorList.size(); i++) {
int localYOffset = 0;
QColor arrowColor(Qt::black);
if (i == currentColorIndex()) {
localYOffset = m_yOffset;
arrowColor = QColor(0x909090);
}
p.setPen(arrowColor);
if (i == 0 || i == (m_colorList.size() - 1))
localYOffset = 0;
int pos = qreal((width() - 16)) * m_stops.at(i) + 9;
p.setBrush(arrowColor);
QVector<QPointF> points;
if (localYOffset < -8)
p.setOpacity(0.5);
points.append(QPointF(pos + 0.5, 28.5 + localYOffset)); //triangle
points.append(QPointF(pos - 3.5, 22.5 + localYOffset));
points.append(QPointF(pos + 4.5, 22.5 + localYOffset));
p.setRenderHint(QPainter::Antialiasing, true);
p.drawPolygon(points);
p.setRenderHint(QPainter::Antialiasing, false);
p.setBrush(Qt::NoBrush);
p.setPen(QColor(0x424242));
p.drawRect(pos - 4, 9 + localYOffset, 10, 11);
p.drawTiledPixmap(pos - 4, 9 + localYOffset, 9, 10, tilePixMap(5));
p.setPen(QColor(0x424242));
p.setBrush(m_colorList.at(i));
p.drawRect(pos - 5, 8 + localYOffset, 10, 11);
p.setBrush(Qt::NoBrush);
p.setPen(QColor(255, 255, 255, 30));
p.drawRect(pos - 4, 9 + localYOffset, 8, 9);
p.setOpacity(1);
}
}
}
