public override void MouseUp(Terraria.UI.UIMouseEvent evt)
{
isDragging = false;
Left.Set(evt.MousePosition.X - offset.X, 0f);
Top.Set(evt.MousePosition.Y - offset.Y, 0f);
Recalculate();
}
public override void MouseDown(Terraria.UI.UIMouseEvent evt)
{
isDragging = true;
offset = new Vector2(evt.MousePosition.X - Left.Pixels, evt.MousePosition.Y - Top.Pixels);
}