Change from dimension2d<s32> to dimension2d<u32> where practical. IImage and ITexture now have unsigned dimensions, as does screen size. This has had a significant knock-on through the code base, but it is more technically correct - the BEST KIND of correct.
GUI elements and draw2DImage methods still have and take signed dimensions, but we can look into this in future. Regression tested with the test suite and the example apps. Note that createDevice() now takes dimension2d<u32>!
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2092 dfc29bdd-3216-0410-991c-e03cc46cb475
modalscreens now resize to fit parent.
updated meshviewer example to lock the image to the bottom left corner.
tooltips:
added EGDC_TOOLTIP_BACKGROUND to skins.
changed the position of tooltips and their time between creation to 500ms.
made sure that they do not leave the area of the gui environment.
new method: rect::constrainTo to forcing one rectangle to stay inside another.
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@697 dfc29bdd-3216-0410-991c-e03cc46cb475
