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