GuiContol: reposition() instead of resize()

In stock TGE, if you want to move a GuiControl, you call resize(newPosition, newSize).
For my own controls, i've added reposition(newPosition), but the vast bulk of the code is using resize().

Resize is a little brain-dead in that it always calls parentResized() on all the control's children, which in turn calls resize(), and so on.

This is a very simple mod to simply not call resize on the children unless the size has actually changed.

The code doesn't even really deserve to be a resource, just the idea, but here it is anyhow.

The only thing i'm a little unsure of is that i cut the call to SetUpdate() out of the loop if it's only a reposition. I'm not sure what SetUpdate does, but my gui's are working fine, including the GuiEditor.


in GuiControl.cc, replave the whole resize() method with this:

void GuiControl::resize(const Point2I &newPosition, const Point2I &newExtent)
{
   Point2I actualNewExtent = Point2I(getMax(mMinExtent.x, newExtent.x),
                                     getMax(mMinExtent.y, newExtent.y));

   // only do the child control resizing stuff if you really need to.
   bool extentChanged = (actualNewExtent != mBounds.extent);

   if (extentChanged) {
      //call set update both before and after
      setUpdate();
      iterator i;
      for(i = begin(); i != end(); i++)
      {
         GuiControl *ctrl = static_cast<GuiControl *>(*i);
         ctrl->parentResized(mBounds.extent, actualNewExtent);
      }
      mBounds.set(newPosition, actualNewExtent);

      GuiControl *parent = getParent();
	   if (parent)
         parent->childResized(this);
      setUpdate();
   }
   else {
      mBounds.point = newPosition;
   }
}