Drawing a Rect2D selection box in reverse

Question

I have a drawing program where I have the ability to draw a Rect2D object onto the screen by clicking and dragging from top/left to bottom/right. It is used for selecting objects that have been drawn. I was wondering how to make it draw in reverse so if you started at the bottom/right and dragged top/left it would also draw a box.
Here is some code:
mouseDragged() {
mdX = e.getX();
mdY = e.getY();
     selectionBox = new Rectangle2D.Float(mmX, mmY, mdX-mmX, mdY-mmY);
     repaint();
mouseMoved() {
mmX=e.getX();
mmY=e.getY();
paint() {
//code to paint selection box
g2.draw(selectionBox)
I tried a bunch of things, and am really stuck on this. Does anyone have any tips on how to do this?

Answer 1

Found the answer:
     int rectX=mmX;
          int rectY=mmY;
          int rectWidth=mdX-mmX;
          int rectHeight=mdY-mmY;
          if(rectWidth<0)     {
               rectX +=rectWidth;
               rectWidth *= -1;
          if(rectHeight<0)     {
               rectY +=rectHeight;
               rectHeight *= -1;
          System.out.println("mmX: "+mmX+" mmY:"+mmY+"mdX: "+mdX+" mdY:"+mdY+" width:"+rectWidth+" height:"+rectHeight);
          selectionBox = new Rectangle2D.Float(rectX,rectY, rectWidth, rectHeight);