C++ MarbleWidget::setCursor方法代码示例

bool PopupItem::eventFilter( QObject *object, QEvent *e )
{
    MarbleWidget *widget = dynamic_cast<MarbleWidget*> ( object );
    if ( !widget ) {
        return BillboardGraphicsItem::eventFilter( object, e );
    }

    if ( e->type() == QEvent::MouseButtonDblClick
            || e->type() == QEvent::MouseMove
            || e->type() == QEvent::MouseButtonPress
            || e->type() == QEvent::MouseButtonRelease )
    {
        // Mouse events are forwarded to the underlying widget
        QMouseEvent *event = static_cast<QMouseEvent*> ( e );
        QPoint const shiftedPos = transform( event->pos() );
        bool const forcedMouseRelease = m_needMouseRelease && e->type() == QEvent::MouseButtonRelease;
        if ( !shiftedPos.isNull() || forcedMouseRelease ) {
            if ( !m_needMouseRelease && e->type() == QEvent::MouseButtonPress ) {
                m_needMouseRelease = true;
            } else if ( forcedMouseRelease ) {
                m_needMouseRelease = false;
            }
            widget->setCursor( Qt::ArrowCursor );
            // transform to children's coordinates
            QMouseEvent shiftedEvent = QMouseEvent( e->type(), shiftedPos,
                                                    event->globalPos(), event->button(), event->buttons(),
                                                    event->modifiers() );
            if ( QApplication::sendEvent( m_webView, &shiftedEvent ) ) {
                widget->setCursor( m_webView->cursor() );
                emit dirty();
                return true;
            }
        }
    } else if ( e->type() == QEvent::Wheel ) {
        // Wheel events are forwarded to the underlying widget
        QWheelEvent *event = static_cast<QWheelEvent*> ( e );
        QPoint const shiftedPos = transform( event->pos() );
        if ( !shiftedPos.isNull() ) {
            widget->setCursor( Qt::ArrowCursor );
            QWheelEvent shiftedEvent = QWheelEvent( shiftedPos,
                                                    event->globalPos(), event->delta(), event->buttons(),
                                                    event->modifiers() );
            if ( QApplication::sendEvent( m_webView, &shiftedEvent ) ) {
                widget->setCursor( m_webView->cursor() );
                emit dirty();
                return true;
            }
        }
    }

    return BillboardGraphicsItem::eventFilter( object, e );
}

bool License::eventFilter( QObject *object, QEvent *event )
{
    if ( !enabled() || !visible() )
        return false;

    MarbleWidget *widget = dynamic_cast<MarbleWidget*>( object );
    if ( !widget ) {
        return AbstractFloatItem::eventFilter( object,event );
    }

    if( event->type() == QEvent::MouseMove ) {
        QMouseEvent *mouseEvent = static_cast<QMouseEvent*>( event );
        QRectF floatItemRect = QRectF( positivePosition(), size() );
        if ( floatItemRect.contains( mouseEvent->pos() ) ) {
            widget->setCursor( QCursor( Qt::ArrowCursor ) );
            return true;
        }
    }

    return AbstractFloatItem::eventFilter( object, event );
}

//.........这里部分代码省略.........
        if ( e->type() == QEvent::MouseMove ) {
            return false;
        }
        
        // Move ScreenGraphicsItem
        if ( e->type() == QEvent::MouseButtonPress )
        {
            QMouseEvent *event = static_cast<QMouseEvent*>(e);

            // Click and move above a float item triggers moving the float item
            if ( contains( event->pos() ) ) {
                if ( event->button() == Qt::LeftButton ) {
                    p()->m_floatItemMoveStartPos = event->pos();
                    p()->m_floatItemMoving = true;
                    return true;
                }
            }
        }
        
        return false;
    }
    else {
        // Move ScreenGraphicsItem
        bool cursorAboveFloatItem = false;
        if ( e->type() == QEvent::MouseMove
            || e->type() == QEvent::MouseButtonPress
            || e->type() == QEvent::MouseButtonRelease )
        {
            QMouseEvent *event = static_cast<QMouseEvent*>( e );
            // The rect the item was painted on before. We add one pixel as antialiasing could
            // result into painting on these pixels to.
            QRectF floatItemRect = QRectF( positivePosition() - QPoint( 1, 1 ),
                                           size() + QSize( 2, 2 ) );

            // Click and move above a float item triggers moving the float item
            if ( contains( event->pos() ) ) {
                cursorAboveFloatItem = true;

                if ( e->type() == QEvent::MouseButtonPress && event->button() == Qt::LeftButton ) {
                    p()->m_floatItemMoveStartPos = event->pos();
                    return true;
                }
            }

            if ( e->type() == QEvent::MouseMove && event->buttons() & Qt::LeftButton && p()->isMovable() )
            {
                p()->m_floatItemMoving = true;
                const QPoint &point = event->pos();
                QPointF position = positivePosition();
                qreal newX = position.x()+point.x()-p()->m_floatItemMoveStartPos.x();
                qreal newY = position.y()+point.y()-p()->m_floatItemMoveStartPos.y();
                if ( newX >= 0 && newY >= 0 ) {
                    // docking behavior
                    const qreal dockArea = 60.0; // Alignment area width/height
                    const qreal dockJump = 30.0; // Alignment indicator jump size
                    if ( widget->width()-size().width()-newX < dockArea ) {
                        newX = qMin( qreal( -1.0 ), size().width() + newX-widget->width() );
                        if ( p()->m_floatItemMoveStartPos.x() < event->pos().x() ) {
                            // Indicate change to right alignment with a short jump
                            newX = qMax( newX, -(dockArea-dockJump) );
                        }
                    }
                    if ( widget->height()-size().height()-newY < dockArea ) {
                        newY = qMin( qreal( -1.0 ), size().height() + newY-widget->height() );
                        if (p()->m_floatItemMoveStartPos.y()<event->pos().y()) {
                        // Indicate change to bottom alignment with a short jump
                        newY = qMax( newY, -( dockArea - dockJump ) );
                        }
                    }

                    setPosition( QPointF( newX,newY ) );
                    // The rect the item will be painted on now. We add one pixel as
                    // antialiasing could result into painting on these pixels to.
                    QRect newFloatItemRect = QRectF( positivePosition() - QPoint( 1, 1 ),
                                                     size() + QSize( 2, 2 ) ).toRect();
                    p()->m_floatItemMoveStartPos = event->pos();
                    QRegion dirtyRegion( floatItemRect.toRect() );
                    dirtyRegion = dirtyRegion.united( newFloatItemRect );

                    widget->setAttribute( Qt::WA_NoSystemBackground,  false );
                    widget->update(dirtyRegion);
                    widget->setAttribute( Qt::WA_NoSystemBackground, widget->viewport()->mapCoversViewport() );
                    return true;
                }
            }

            if ( e->type() == QEvent::MouseButtonRelease ) {
                p()->m_floatItemMoving = false;
            }

            // Adjusting Cursor shape
            if ( cursorAboveFloatItem || p()->m_floatItemMoving ) {
                widget->setCursor(QCursor(Qt::SizeAllCursor));
                return true;
            }
        }
        
        return MarbleGraphicsItem::eventFilter( object, e );
    }
}

bool ElevationProfileFloatItem::eventFilter( QObject *object, QEvent *e )
{
    if ( !enabled() || !visible() ) {
        return false;
    }

    MarbleWidget *widget = dynamic_cast<MarbleWidget*>( object );
    if ( !widget ) {
        return AbstractFloatItem::eventFilter(object,e);
    }

    if ( widget && !m_marbleWidget ) {
        m_marbleWidget = widget;
        connect( this, SIGNAL(dataUpdated()), this, SLOT(updateVisiblePoints()) );
        connect( m_marbleWidget, SIGNAL(visibleLatLonAltBoxChanged(GeoDataLatLonAltBox)),
                 this, SLOT(updateVisiblePoints()) );
        connect( this, SIGNAL(settingsChanged(QString)), this, SLOT(updateVisiblePoints()) );
    }

    if ( e->type() == QEvent::MouseButtonDblClick || e->type() == QEvent::MouseMove ) {
        GeoDataTreeModel *const treeModel = const_cast<MarbleModel *>( marbleModel() )->treeModel();

        QMouseEvent *event = static_cast<QMouseEvent*>( e  );
        QRectF plotRect = QRectF ( m_leftGraphMargin, 0, m_eleGraphWidth, contentSize().height() );
        plotRect.translate( positivePosition() );
        plotRect.translate( padding(), padding() );

        // for antialiasing: increase size by 1 px to each side
        plotRect.translate(-1, -1);
        plotRect.setSize(plotRect.size() + QSize(2, 2) );

        const bool cursorAboveFloatItem = plotRect.contains(event->pos());

        if ( cursorAboveFloatItem ) {
            const int start = m_zoomToViewport ? m_firstVisiblePoint : 0;
            const int end = m_zoomToViewport ? m_lastVisiblePoint : m_eleData.size();

            // Double click triggers recentering the map at the specified position
            if ( e->type() == QEvent::MouseButtonDblClick ) {
                const QPointF mousePosition = event->pos() - plotRect.topLeft();
                const int xPos = mousePosition.x();
                for ( int i = start; i < end; ++i) {
                    const int plotPos = ( m_eleData.value(i).x() - m_axisX.minValue() ) * m_eleGraphWidth / m_axisX.range();
                    if ( plotPos >= xPos ) {
                        widget->centerOn( m_points[i], true );
                        break;
                    }
                }
                return true;
            }

            if ( e->type() == QEvent::MouseMove && !(event->buttons() & Qt::LeftButton) ) {
                // Cross hair cursor when moving above the float item
                // and mark the position on the graph
                widget->setCursor(QCursor(Qt::CrossCursor));
                if ( m_cursorPositionX != event->pos().x() - plotRect.left() ) {
                    m_cursorPositionX = event->pos().x() - plotRect.left();
                    const qreal xpos = m_axisX.minValue() + ( m_cursorPositionX / m_eleGraphWidth ) * m_axisX.range();
                    GeoDataCoordinates currentPoint; // invalid coordinates
                    for ( int i = start; i < end; ++i) {
                        if ( m_eleData.value(i).x() >= xpos ) {
                            currentPoint = m_points[i];
                            currentPoint.setAltitude( m_eleData.value(i).y() );
                            break;
                        }
                    }
                    m_markerPlacemark->setCoordinate( currentPoint );
                    if ( m_documentIndex < 0 ) {
                        m_documentIndex = treeModel->addDocument( &m_markerDocument );
                    }
                    emit repaintNeeded();
                }

                return true;
            }
        }
        else {
            if ( m_documentIndex >= 0 ) {
                m_markerPlacemark->setCoordinate( GeoDataCoordinates() ); // set to invalid
                treeModel->removeDocument( &m_markerDocument );
                m_documentIndex = -1;
                emit repaintNeeded();
            }
        }
    }

    return AbstractFloatItem::eventFilter(object,e);
}