void ImageViewer::myMouseMove(QMouseEvent * event)
{
QPoint change = event->globalPos() - startPos;
if(event->modifiers() == Qt::ControlModifier){
emit siteChange(change);
}else{
//if widget smaller than widget, allow to move image.
//! + SIZE_ADJUST
if(hasPicture() && !(rect().size() + Config::SizeAdjusted - image.size()*scale).isValid()){
shift += change;
updateShift();
QPoint delta = event->pos() - pressPos;
if(justPressed){
if (delta.x() > threshold || delta.x() < -threshold ||
delta.y() > threshold || delta.y() < -threshold) {
timeStamp = QTime::currentTime(); //start calculate
justPressed = false; ///
this->delta = QPoint(0, 0);
pressPos = event->pos();
}
}else{
if (timeStamp.elapsed() > 100) {
timeStamp = QTime::currentTime(); //restart calculate
speed = delta - this->delta; ///
this->delta = delta;
}
}
}
}
startPos = event->globalPos(); //
}
void ImageViewer::scrollContent(int deltaX, int deltaY)
{
// if widget smaller than widget, allow to move image.
if(hasPicture() && scaleLargeThanWidget()){
shift.setX(shift.x() + deltaX);
shift.setY(shift.y() + deltaY);
updateShift();
}
}
void ImageViewer::resizeEvent(QResizeEvent *e)
{
if(noPicture()) return;
if(hasUserZoom){
updateTopLeft();
updateShift();
}else{
initToFitWidget();
}
QWidget::resizeEvent(e);
}
void ImageViewer::resizeEvent(QResizeEvent *e)
{
if(noPicture()) return;
if(hasUserZoom){
calcTopLeft();
updateShift();
updateCursor();
}else{
layoutImage(); //! FIXME: if user drag and move image content (when AlignCenter is hasUserZoom and shift != (0,0)) , this will reset the shift if align mode isn't AlignCenterCenter.
}
QWidget::resizeEvent(e);
}
void ImageViewer::zoomIn(double factor, const QPoint &pivot)
{
if(noPicture() || !rect().contains(pivot)) // pivot must inner widget
return;
qreal scale_old = scale;
zoomIn(factor);
QPointF distance(rect().center() - pivot);
QPointF change(distance / scale_old * scale - distance);
shift += change; // to keep the pivot position, must after scale.
updateShift();
}
void ImageViewer::myTimerEvent()
{
speed = deaccelerate(speed);
QPointF shiftOld = shift;
shift += speed;
updateShift();
if(shift == shiftOld)
speed = QPoint(0, 0);
if (speed == QPoint(0, 0))
timer.stop();
}
void DistanceFieldShiftedStyleTextMaterialShader::updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect)
{
DistanceFieldStyledTextMaterialShader::updateState(state, newEffect, oldEffect);
QSGDistanceFieldShiftedStyleTextMaterial *material = static_cast<QSGDistanceFieldShiftedStyleTextMaterial *>(newEffect);
QSGDistanceFieldShiftedStyleTextMaterial *oldMaterial = static_cast<QSGDistanceFieldShiftedStyleTextMaterial *>(oldEffect);
if (oldMaterial == 0
|| oldMaterial->fontScale() != material->fontScale()
|| oldMaterial->shift() != material->shift()
|| oldMaterial->textureSize() != material->textureSize()) {
updateShift(material->fontScale(), material->shift());
}
}
void ImageViewer::zoomIn(double factor)
{
if(noPicture()) return;
qreal scale_old = scale;
scale += factor;
scale = qMax(scaleMin, qMin(Config::ScaleMax, scale));
if(scale == scale_old)//scale no changed
return;
/*! topLeft must determined before shift,
* otherwise will impact updateShift()
*/
updateTopLeft();
shift /= scale_old;
shift *= scale;
updateShift();
hasUserZoom = true;
ToolTip::showText(mapToGlobal(rect().center()),
QString("<font size='7'><b>%1%</b></font>").arg(scale * 100, 0, 'g', 4),
true, 0.7, 800);
}
void ImageViewer::wheelEvent(QWheelEvent *e)
{
if(noPicture() || !rect().contains(e->pos())) //cursor is not in widget
return;
qreal scale_old = scale;
switch(e->modifiers()){
case Qt::ShiftModifier:
zoomIn(e->delta() / qreal(2400)); //e->delta() is +120 or -120
break;
case Qt::ControlModifier:
zoomIn(e->delta() / qreal(600));
break;
default:
zoomIn(e->delta() / qreal(1200));
break;
}
QPointF distance(rect().center() - e->pos());
QPointF change(distance / scale_old * scale - distance);
shift += change; //to keep the cursor position, must after scale.
updateShift();
}
void ShiftButton::updateSelection(const sf::Vector2f& mousePosition, const sf::Time& delta)
{
if(bound.contains(mousePosition))
{
if(_shiftMax != _currentShift)
{
_currentShift.x += _shiftMax.x * (delta.asSeconds() / _shiftDuration);
_currentShift.y += _shiftMax.y * (delta.asSeconds() / _shiftDuration);
if(_shiftMax.x > 0)
{
if(_currentShift.x > _shiftMax.x)
{
_currentShift.x = _shiftMax.x;
}
}
else if(_shiftMax.x < 0)
{
if(_currentShift.x < _shiftMax.x)
{
_currentShift.x = _shiftMax.x;
}
}
if(_shiftMax.y > 0)
{
if(_currentShift.y > _shiftMax.y)
{
_currentShift.y = _shiftMax.y;
}
}
else if(_shiftMax.y < 0)
{
if(_currentShift.y < _shiftMax.y)
{
_currentShift.y = _shiftMax.y;
}
}
}
}
else
{
if(_currentShift != sf::Vector2f(0,0))
{
_currentShift.x -= _shiftMax.x * (delta.asSeconds() / _shiftDuration);
_currentShift.y -= _shiftMax.y * (delta.asSeconds() / _shiftDuration);
if(_shiftMax.x > 0)
{
if(_currentShift.x < 0)
{
_currentShift.x = 0;
}
}
else if(_shiftMax.x < 0)
{
if(_currentShift.x > 0 )
{
_currentShift.x = 0;
}
}
if(_shiftMax.y > 0)
{
if(_currentShift.y < 0)
{
_currentShift.y = 0;
}
}
else if(_shiftMax.y < 0)
{
if(_currentShift.y > 0)
{
_currentShift.y = 0;
}
}
}
}
updateShift();
}
void ShiftButton::setPosition(sf::Vector2f position)
{
// set the actual position
_actualPosition = position;
updateShift();
}
ShiftButton::ShiftButton(sf::Sprite buttonSprite, sf::Vector2f shiftMax, float shiftDuration)
: bound(_bound), _sprite(buttonSprite), _actualPosition(0,0), _currentPosition(0,0), _shiftMax(shiftMax)
, _shiftDuration(shiftDuration)
{
updateShift();
}
