VisualizationDragWidget.cpp
53 lines
| 1.3 KiB
| text/x-c
|
CppLexer
| r841 | #include "Visualization/VisualizationDragWidget.h" | |||
| #include "Visualization/VisualizationDragDropContainer.h" | ||||
| #include <QApplication> | ||||
| r847 | #include <QMouseEvent> | |||
| r841 | ||||
| struct VisualizationDragWidget::VisualizationDragWidgetPrivate { | ||||
| r847 | QPoint m_DragStartPosition; | |||
| bool m_DragStartPositionValid = false; | ||||
| r841 | ||||
| r847 | explicit VisualizationDragWidgetPrivate() {} | |||
| r841 | }; | |||
| r847 | VisualizationDragWidget::VisualizationDragWidget(QWidget *parent) | |||
| : QWidget{parent}, impl{spimpl::make_unique_impl<VisualizationDragWidgetPrivate>()} | ||||
| r841 | { | |||
| } | ||||
| void VisualizationDragWidget::mousePressEvent(QMouseEvent *event) | ||||
| { | ||||
| r847 | if (event->button() == Qt::LeftButton) { | |||
| impl->m_DragStartPosition = event->pos(); | ||||
| } | ||||
| r841 | ||||
| r847 | impl->m_DragStartPositionValid = isDragAllowed(); | |||
| r841 | ||||
| QWidget::mousePressEvent(event); | ||||
| } | ||||
| void VisualizationDragWidget::mouseMoveEvent(QMouseEvent *event) | ||||
| { | ||||
| r847 | if (!impl->m_DragStartPositionValid || !isDragAllowed()) { | |||
| r841 | return; | |||
| r847 | } | |||
| r841 | ||||
| r847 | if (!(event->buttons() & Qt::LeftButton)) { | |||
| r841 | return; | |||
| r847 | } | |||
| r841 | ||||
| r847 | if (!event->modifiers().testFlag(Qt::AltModifier)) { | |||
| r841 | return; | |||
| r847 | } | |||
| r841 | ||||
| r847 | if ((event->pos() - impl->m_DragStartPosition).manhattanLength() | |||
| < QApplication::startDragDistance()) { | ||||
| r841 | return; | |||
| r847 | } | |||
| r841 | ||||
| r847 | emit dragDetected(this, impl->m_DragStartPosition); | |||
| r841 | ||||
| QWidget::mouseMoveEvent(event); | ||||
| } | ||||
