QVariant MapObjectItem::itemChange(GraphicsItemChange change,
const QVariant &value)
{
if (!mSyncing) {
MapRenderer *renderer = mMapDocument->renderer();
if (change == ItemPositionChange
&& (QApplication::keyboardModifiers() & Qt::ControlModifier))
{
const QPointF pixelDiff = value.toPointF() - mOldItemPos;
const QPointF newPixelPos =
renderer->tileToPixelCoords(mOldObjectPos) + pixelDiff;
// Snap the position to the grid
const QPointF newTileCoords =
renderer->pixelToTileCoords(newPixelPos).toPoint();
return renderer->tileToPixelCoords(newTileCoords);
}
else if (change == ItemPositionHasChanged) {
// Update the position of the map object
const QPointF pixelDiff = value.toPointF() - mOldItemPos;
const QPointF newPixelPos =
renderer->tileToPixelCoords(mOldObjectPos) + pixelDiff;
mObject->setPosition(renderer->pixelToTileCoords(newPixelPos));
}
}
return QGraphicsItem::itemChange(change, value);
}
QVariant ResizeHandle::itemChange(GraphicsItemChange change,
const QVariant &value)
{
if (!mMapObjectItem->mSyncing) {
MapRenderer *renderer = mMapObjectItem->mapDocument()->renderer();
if (change == ItemPositionChange) {
// Calculate the absolute pixel position
const QPointF itemPos = mMapObjectItem->pos();
QPointF pixelPos = value.toPointF() + itemPos;
// Calculate the new coordinates in tiles
QPointF tileCoords = renderer->pixelToTileCoords(pixelPos);
const QPointF objectPos = mMapObjectItem->mapObject()->position();
tileCoords -= objectPos;
tileCoords.setX(qMax(tileCoords.x(), qreal(0)));
tileCoords.setY(qMax(tileCoords.y(), qreal(0)));
if (QApplication::keyboardModifiers() & Qt::ControlModifier)
tileCoords = tileCoords.toPoint();
tileCoords += objectPos;
return renderer->tileToPixelCoords(tileCoords) - itemPos;
}
else if (change == ItemPositionHasChanged) {
// Update the size of the map object
const QPointF newPos = value.toPointF() + mMapObjectItem->pos();
QPointF tileCoords = renderer->pixelToTileCoords(newPos);
tileCoords -= mMapObjectItem->mapObject()->position();
mMapObjectItem->resize(QSizeF(tileCoords.x(), tileCoords.y()));
}
}
return QGraphicsItem::itemChange(change, value);
}