public void OnMouseUp(MouseEventArgs e, MapToolContext ctx)
{
if (isDragging && e.Button == MouseButtons.Left)
{
Point tileDelta = GetTileDelta(e, ctx);
if (IsValidDropPos(tileDelta))
{
// The drop location is valid; delete all tiles to be moved then recreate them in their
// new location.
foreach (var selectedItem in selectionService.SelectedItems)
{
mapService.DeleteTile(selectedItem.Bounds.Location);
}
foreach (var selectedItem in selectionService.SelectedItems)
{
Point newLocation = selectedItem.Bounds.Location;
newLocation.Offset(tileDelta);
mapService.AddItem(selectedItem.Item, newLocation);
}
selectionService.ApplyTileDelta(tileDelta);
}
else
{
MessageBox.Show(ctx.Viewport, "This space is already occupied", "Unable to Move Items", MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
isDragging = false;
selectionRenderer.TileOffset = Point.Empty;
}
}