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Implement drag surface transformation for touch events

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Reusing the pointer transformation causes drag with touch to send
completely incorrect coordinates. So implement the "TODO" item about
surface transformation for touch, so we send correct drag events for
touch.
This commit is contained in:
Arjen Hiemstra 2021-10-26 13:32:05 +02:00
parent 1bd496f42b
commit 8af2a010c7
2 changed files with 6 additions and 4 deletions
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9
src/wayland/seat_interface.cpp
View file

@ -1027,7 +1027,8 @@ void SeatInterface::setFocusedTouchSurface(SurfaceInterface *surface, const QPoi
}
d->globalTouch.focus = SeatInterfacePrivate::Touch::Focus();
d->globalTouch.focus.surface = surface;
d->globalTouch.focus.offset = surfacePosition;
setFocusedTouchSurfacePosition(surfacePosition);
if (d->globalTouch.focus.surface) {
d->globalTouch.focus.destroyConnection = connect(surface, &QObject::destroyed, this, [this]() {
if (isTouchSequence()) {
@ -1043,6 +1044,8 @@ void SeatInterface::setFocusedTouchSurface(SurfaceInterface *surface, const QPoi
void SeatInterface::setFocusedTouchSurfacePosition(const QPointF &surfacePosition)
{
d->globalTouch.focus.offset = surfacePosition;
d->globalTouch.focus.transformation = QMatrix4x4();
d->globalTouch.focus.transformation.translate(-surfacePosition.x(), -surfacePosition.y());
}
void SeatInterface::notifyTouchDown(qint32 id, const QPointF &globalPosition)
@ -1322,7 +1325,7 @@ void SeatInterface::startDrag(AbstractDataSource *dragSource, SurfaceInterface *
d->drag.transformation = d->globalPointer.focus.transformation;
} else if (hasImplicitTouchGrab(dragSerial)) {
d->drag.mode = SeatInterfacePrivate::Drag::Mode::Touch;
// TODO: touch transformation
d->drag.transformation = d->globalTouch.focus.transformation;
} else {
// no implicit grab, abort drag
return;
@ -1331,8 +1334,6 @@ void SeatInterface::startDrag(AbstractDataSource *dragSource, SurfaceInterface *
// set initial drag target to ourself
d->drag.surface = originSurface;
// TODO: transformation needs to be either pointer or touch
d->drag.transformation = d->globalPointer.focus.transformation;
d->drag.source = dragSource;
if (dragSource) {

1
src/wayland/seat_interface_p.h
View file

@ -108,6 +108,7 @@ public:
QMetaObject::Connection destroyConnection;
QPointF offset = QPointF();
QPointF firstTouchPos;
QMatrix4x4 transformation;
};
Focus focus;
QMap<qint32, quint32> ids;