Qt QXYSeries 和 ChartView - 修改悬停行为以在一个范围内触发
Qt QXYSeries and ChartView - modify hovered behavior to trigger within a range
我有一个由 QXYSeries 表示的散点图,并使用 Qt Charts 5.7 中的 ChartView 查看。
我想将鼠标悬停在绘图上,"hovered" 在一定距离内触发,而不是仅当我的光标直接位于某个点上方时。想象鼠标周围有一个圆圈,只要系列的任何部分在其中,就会触发悬停。
有没有办法获得这种行为?
最终,我通过创建一个继承自 QChartView 并覆盖 mouseMoveEvent(QMouseEvent* event)
的 class 得到了这种行为:
void ScatterView::mouseMoveEvent(QMouseEvent* event)
{
if(!this->chart()->axisX() || !this->chart()->axisY())
{
return;
}
QPointF inPoint;
QPointF chartPoint;
inPoint.setX(event->x());
inPoint.setY(event->y());
chartPoint = chart()->mapToValue(inPoint);
handleMouseMoved(chartPoint);
}
void ScatterView::handleMouseMoved(const QPointF &point)
{
QPointF mousePoint = point;
qreal distance(0.2); //distance from mouse to point in chart axes
foreach (QPointF currentPoint, scatterSeries->points()) {
qreal currentDistance = qSqrt((currentPoint.x() - mousePoint.x())
* (currentPoint.x() - mousePoint.x())
+ (currentPoint.y() - mousePoint.y())
* (currentPoint.y() - mousePoint.y()));
if (currentDistance < distance) {
triggerPoint(currentPoint);
}
}
}
我有一个由 QXYSeries 表示的散点图,并使用 Qt Charts 5.7 中的 ChartView 查看。
我想将鼠标悬停在绘图上,"hovered" 在一定距离内触发,而不是仅当我的光标直接位于某个点上方时。想象鼠标周围有一个圆圈,只要系列的任何部分在其中,就会触发悬停。
有没有办法获得这种行为?
最终,我通过创建一个继承自 QChartView 并覆盖 mouseMoveEvent(QMouseEvent* event)
的 class 得到了这种行为:
void ScatterView::mouseMoveEvent(QMouseEvent* event)
{
if(!this->chart()->axisX() || !this->chart()->axisY())
{
return;
}
QPointF inPoint;
QPointF chartPoint;
inPoint.setX(event->x());
inPoint.setY(event->y());
chartPoint = chart()->mapToValue(inPoint);
handleMouseMoved(chartPoint);
}
void ScatterView::handleMouseMoved(const QPointF &point)
{
QPointF mousePoint = point;
qreal distance(0.2); //distance from mouse to point in chart axes
foreach (QPointF currentPoint, scatterSeries->points()) {
qreal currentDistance = qSqrt((currentPoint.x() - mousePoint.x())
* (currentPoint.x() - mousePoint.x())
+ (currentPoint.y() - mousePoint.y())
* (currentPoint.y() - mousePoint.y()));
if (currentDistance < distance) {
triggerPoint(currentPoint);
}
}
}