HG_REPOSITORIES/LPP/INSTRUMENTATION/USERS/JEANDET/qtcharts Commit - r2188:ad6cfe65c3e1

fixed mouse event delta handling

sauimone -

r2188:ad6cfe65c3e1

parent child

Context file:

r2188:ad6cfe65c3e1

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src/legend/legendmarkeritem.cpp +6 -2

             void LegendMarkerItem::mouseMoved(QPointF delta)
             {
-                m_marker->m_legend->d_ptr->setOffset(-delta.x(), -delta.y());
+                qreal dx = m_marker->m_legend->d_ptr->offset().x() - delta.x();
+                qreal dy = m_marker->m_legend->d_ptr->offset().y() - delta.y();
+                m_marker->m_legend->d_ptr->setOffset(dx, dy);
             }
             void LegendMarkerItem::mouseReleased(QPointF delta)
             {
-                m_marker->m_legend->d_ptr->setOffset(-delta.x(), -delta.y());
+                qreal dx = m_marker->m_legend->d_ptr->offset().x() - delta.x();
+                qreal dy = m_marker->m_legend->d_ptr->offset().y() - delta.y();
+                m_marker->m_legend->d_ptr->setOffset(dx, dy);
             }
             #include "moc_legendmarkeritem_p.cpp"

src/legend/mouseeventhandler.cpp +7 -4

             QTCOMMERCIALCHART_BEGIN_NAMESPACE
             MouseEventHandler::MouseEventHandler() :
-                m_pressedPos(0,0),
+                m_lastPos(0,0),
                 m_state(Idle),
                 m_treshold(10)
             {
             void MouseEventHandler::handleMousePressEvent(QGraphicsSceneMouseEvent* event)
             {
-                m_pressedPos = event->pos();
+                m_lastPos = event->screenPos();
                 m_state = Pressed;
                 event->accept();
             }
             void MouseEventHandler::handleMouseMoveEvent(QGraphicsSceneMouseEvent* event)
             {
-                QPointF delta = event->pos() - m_pressedPos;
+                QPointF delta = event->screenPos() - m_lastPos;
                 switch (m_state) {
                 case Pressed: {
                     // calculate treshold. If enough, change to move state and send out move deltas.
                     if (qAbs(delta.x()) > m_treshold || qAbs(delta.y()) > m_treshold) {
                         m_state = Moved;
+                        m_lastPos = event->screenPos();
                         mouseMoved(delta);
                     }
                     event->accept();
                     break;
                 }
                 case Moved: {
+                    m_lastPos = event->screenPos();
                     mouseMoved(delta);
                     event->accept();
                     break;
             void MouseEventHandler::handleMouseReleaseEvent(QGraphicsSceneMouseEvent* event)
             {
-                QPointF delta = event->pos() - m_pressedPos;
+                QPointF delta = event->screenPos() - m_lastPos;
+                m_lastPos = event->screenPos();
                 switch (m_state) {
                 case Pressed:

src/legend/mouseeventhandler_p.h +1 -1

                 void handleMouseReleaseEvent(QGraphicsSceneMouseEvent* event);
             private:
-                QPointF m_pressedPos;
+                QPointF m_lastPos;
                 State m_state;
                 qreal m_treshold;
             };

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