本文整理汇总了C++中qtouchevent::TouchPoint::lastPos方法的典型用法代码示例。如果您正苦于以下问题：C++ TouchPoint::lastPos方法的具体用法？C++ TouchPoint::lastPos怎么用？C++ TouchPoint::lastPos使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qtouchevent::TouchPoint的用法示例。
在下文中一共展示了TouchPoint::lastPos方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: event
bool TreeViewTouch::event(QEvent *event) {
#if QT_VERSION >= 0x050000
if (event->type() == QEvent::TouchBegin && ((QTouchEvent*)event)->device()->type()==QTouchDevice::TouchScreen) {
#else
if (event->type() == QEvent::TouchBegin && ((QTouchEvent*)event)->deviceType()==QTouchEvent::TouchScreen) {
#endif
// Register that we may be scrolling, set the scroll mode to scroll-per-pixel
// and accept the event (return true) so that we will receive TouchUpdate and TouchEnd/TouchCancel
_touchScrollInProgress = true;
setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
return true;
}
if (event->type() == QEvent::TouchUpdate && _touchScrollInProgress) {
QTouchEvent::TouchPoint p = ((QTouchEvent*)event)->touchPoints().at(0);
if (!_firstTouchUpdateHappened) {
// After the first movement of a Touch-Point, calculate the distance in both axis
// and if the point moved more horizontally abort scroll.
double dx = qAbs(p.lastPos().x() - p.pos().x());
double dy = qAbs(p.lastPos().y() - p.pos().y());
if (dx > dy) {
_touchScrollInProgress = false;
}
_firstTouchUpdateHappened = true;
}
// Apply touch movement to scrollbar
verticalScrollBar()->setValue(verticalScrollBar()->value() - (p.pos().y() - p.lastPos().y()));
return true;
}
#if QT_VERSION >= 0x050000
if (event->type() == QEvent::TouchEnd || event->type() == QEvent::TouchCancel) {
#else
if (event->type() == QEvent::TouchEnd) {
#endif
// End scroll and reset variables
_touchScrollInProgress = false;
_firstTouchUpdateHappened = false;
return true;
}
return QTreeView::event(event);
}
void TreeViewTouch::mousePressEvent(QMouseEvent *event) {
if (!_touchScrollInProgress)
QTreeView::mousePressEvent(event);
}
void TreeViewTouch::mouseMoveEvent(QMouseEvent *event) {
if (!_touchScrollInProgress)
QTreeView::mouseMoveEvent(event);
};