Make ComboBox's list draw right

[Sylence]

I noticed that IGUIComboBox draws its drop-down-list under the element in all cases.
This can be bad if the combo box is at the bottom of the screen. The list will than be rendered outside the window so it's not visible.

I fixed this by moving the drop-down-list over the combo box if it would be outside the window.

Add this code in CGUIComboBox::openCloseMenu() after the line "ListBox->drop();"

Code: Select all

		// move listbox up if the box is outside the window
		video::IVideoDriver* Driver = Environment->getVideoDriver();
		r = ListBox->getAbsolutePosition();
		if(r.LowerRightCorner.Y > Driver->getScreenSize().Height)
		{
			ListBox->setRelativePosition(core::rect<s32>(0, -AbsoluteRect.getHeight()-h, AbsoluteRect.getWidth(), 0));
		}