Class DragAndDropInputFilter

src/input.cpp:2564–2914

}

class DragAndDropInputFilter : public QObject, public InputEventFilter
{
    Q_OBJECT

public:
    DragAndDropInputFilter()
        : InputEventFilter(InputFilterOrder::DragAndDrop)
    {
        connect(waylandServer()->seat(), &SeatInterface::dragRequested, this, [](AbstractDataSource *source, SurfaceInterface *origin, quint32 serial, DragAndDropIcon *dragIcon) {
            if (auto window = waylandServer()->findWindow(origin->mainSurface())) {
                QMatrix4x4 transformation = window->inputTransformation();
                transformation.translate(-QVector3D(origin->mapToMainSurface(QPointF(0, 0))));

                if (waylandServer()->seat()->hasImplicitPointerGrab(serial)) {
                    if (waylandServer()->seat()->startPointerDrag(source, origin, waylandServer()->seat()->pointerPos(), transformation, serial, dragIcon)) {
                        return;
                    }
                }

                if (const auto touchPoint = waylandServer()->seat()->touchPointByImplicitGrabSerial(serial)) {
                    if (waylandServer()->seat()->startTouchDrag(source, origin, touchPoint->position, transformation, serial, dragIcon)) {
                        return;
                    }
                }

                if (waylandServer()->tabletManagerV2()->seat(waylandServer()->seat())->hasImplicitGrab(serial)) {
                    if (waylandServer()->seat()->startTabletDrag(source, origin, input()->tablet()->position(), transformation, serial, dragIcon)) {
                        return;
                    }
                }
            }

            if (source) {
                source->dndCancelled();
            }
        });

        connect(waylandServer()->seat(), &SeatInterface::dragStarted, this, [this]() {
            AbstractDataSource *dragSource = waylandServer()->seat()->dragSource();
            if (!dragSource) {
                return;
            }

            dragSource->setKeyboardModifiers(input()->keyboardModifiers());
            connect(input(), &InputRedirection::keyboardModifiersChanged, dragSource, [dragSource](Qt::KeyboardModifiers mods) {
                dragSource->setKeyboardModifiers(mods);
            });
            auto toplevelDrag = waylandServer()->seat()->xdgTopleveldrag();
            if (!toplevelDrag) {
                return;
            }
            setupDraggedToplevel();
            connect(toplevelDrag, &XdgToplevelDragV1Interface::toplevelChanged, this, &DragAndDropInputFilter::setupDraggedToplevel);
        });

        connect(waylandServer()->seat(), &SeatInterface::dragEnded, this, [this] {
            m_dragTarget = nullptr;
            m_lastPos.reset();