#include "Visualization/VisualizationDragWidget.h" #include "Visualization/VisualizationDragDropContainer.h" #include #include struct VisualizationDragWidget::VisualizationDragWidgetPrivate { QPoint m_dragStartPosition; bool m_dragStartPositionValid = false; explicit VisualizationDragWidgetPrivate() { } }; VisualizationDragWidget::VisualizationDragWidget(QWidget* parent) : QWidget{parent}, impl{spimpl::make_unique_impl()} { } void VisualizationDragWidget::mousePressEvent(QMouseEvent *event) { if (event->button() == Qt::LeftButton) impl->m_dragStartPosition = event->pos(); impl->m_dragStartPositionValid = isDragAllowed(); QWidget::mousePressEvent(event); } void VisualizationDragWidget::mouseMoveEvent(QMouseEvent *event) { if (!impl->m_dragStartPositionValid || !isDragAllowed()) return; if (!(event->buttons() & Qt::LeftButton)) return; if (!event->modifiers().testFlag(Qt::AltModifier)) return; if ((event->pos() - impl->m_dragStartPosition).manhattanLength() < QApplication::startDragDistance()) return; emit dragDetected(this, impl->m_dragStartPosition); QWidget::mouseMoveEvent(event); }