void ImageMovementTool::mouseMoved(const QPointF &pos, Qt::KeyboardModifiers modifiers)
{
AbstractImageTool::mouseMoved(pos, modifiers);
if (mMousePressed) {
if (ImageLayer *layer = currentImageLayer()) {
QPointF diff = pos - mMouseStart;
bool snapToGrid = Preferences::instance()->snapToGrid();
bool snapToFineGrid = Preferences::instance()->snapToFineGrid();
if (modifiers & Qt::ControlModifier) {
snapToGrid = !snapToGrid;
snapToFineGrid = false;
}
if (snapToGrid || snapToFineGrid) {
MapRenderer *renderer = mapDocument()->renderer();
int scale = snapToFineGrid ? Preferences::instance()->gridFine() : 1;
const QPointF alignScreenPos =
renderer->pixelToScreenCoords(mLayerStart);
const QPointF newAlignPixelPos = alignScreenPos + diff;
// Snap the position to the grid
QPointF newTileCoords =
(renderer->screenToTileCoords(newAlignPixelPos) * scale).toPoint();
newTileCoords /= scale;
diff = renderer->tileToScreenCoords(newTileCoords) - alignScreenPos;
}
layer->setPosition(mLayerStart + diff.toPoint());
mapDocument()->emitImageLayerChanged(layer);
}
}
}
static QRectF cellRect(const MapRenderer &renderer,
const Cell &cell,
const QPointF &tileCoords)
{
const Tile *tile = cell.tile();
if (!tile)
return QRectF();
QPointF pixelCoords = renderer.tileToScreenCoords(tileCoords);
QPointF offset = tile->offset();
QSize size = tile->size();
if (cell.flippedAntiDiagonally())
std::swap(size.rwidth(), size.rheight());
// This is a correction needed because tileToScreenCoords does not return
// the bottom-left origin of the tile image, but rather the top-left
// corner of the cell.
pixelCoords.ry() += renderer.map()->tileHeight() - size.height();
return QRectF(pixelCoords, size).translated(offset);
}