Crazy Eddie's GUI System  0.8.6
Porting from CEGUI 0.6.x to CEGUI 0.7.x
Paul D Turner

This page lists the major breaking changes, and other related changes, made to the library for the 0.7.x series of releases.

A small number of these changes are reversions of poorly considered and/or poorly implemented facilities added in the 0.6.x series. In most cases this removed functionality is believed largely unused or similar results achievable via previously existing facilities.
Also note that while attempts have been made to see that most of the major changes are listed on this page, it's entirely possible - even likely - that somewhere along the line some things have been missed out. In those cases, please visit the CEGUI forums.

Code organisation and structure

  • The overall structure of the CEGUI code tree has been considerably modified:
    • All actual code for the library and associated modules has been relocated beneath a 'cegui' directory, within this directory there is are src and include subdirectories that contain the source code and public headers respectively. Possibly one of the main advantages of this is that non-linux based systems will now have an identical header layout to what linux has always had.
    • The datafiles directory has moved from Samples to the root directory.
    • The XMLRefSchema directory has moved into the datafiles directory and is renamed xml_schemas.
    • Other changes will largely have minimal impact so we've not covered everything in minute detail.
  • The file and directory naming for Renderer implementations has been modified, although is now unified for all implementations:
    • Headers are now accessed:
      RendererModules/<name of API>/CEGUI<name of API><name of component>.h
    • Examples:
      • the OpenGL renderer header is at:
      • the Ogre geometry buffer header is at:
      • the Direct3D10 render target header is at:

Windows specific and/or MSVC++ specific changes

  • The renderer module output has been unified with that of other systems, so for example, rather than OpenGLGUIRenderer.dll it's now CEGUIOpenGLRenderer.dll.

Apple Mac specific and/or Xcode specific changes

  • We are changing the default bundle locations regarding both embedded frameworks and loadable bundles:
    • Previously all frameworks were incorrectly expected to be in the app bundle's Resources directory, additionally the XMLParser and ImageCodec based loadable bundles were packaged within the CEGUI framework itself, this has changed as follows:
      • All CEGUI related frameworks are to be placed in the correct location of the app bundle's Frameworks directory.
      • The XMLParser and ImageCodec based modules are to be placed within the app bundle's PlugIns directory. This decision was taken because it's up to each app developer to decide which loadable bundles they want to support and so it's more logical to have those placed at the app level rather than embedded deeper within the CEGUI frameworks. Having said this, CEGUI will still look in the PlugIns location of the CEGUIBase framework for bundles; if you wish to reconfigure the loadable bundle targets to be placed there instead, CEGUI will find them (it's just that it's not the preferred default).
  • The main framework is renamed from CEGUI to CEGUIBase. This is mostly to have parity across all platforms as far as module names go, although also reflects the fact that 'CEGUI' on the Mac is no longer a monolithic entity.

CEGUI::System changes

  • System object constructor made private. Construction is now to be done via the System::create static function.
  • System object destructor made private. Destruction is now to be done via the System::destroy static function.
  • Renderer object passed when creating the System object is now passed by reference instead of by pointer (reinforces that it may not be 0).

Window and WindowRenderer factory registration changes

  • There have been changes and additions to the way that new factories for Window and WindowRenderer subclasses are registered with the system. This removes the old preprocessor macro based system with a much cleaner template based arrangement. This means you no longer need to directly create your factory classes and nor do you need to keep static instances hanging around. The overall impact of this means that it's now incredibly simple to register new classes with the system:
    • If you have a Window subclass named 'MyWidget, to add this to the system you can now simply do:
      CEGUI::WindowFactoryManager::addFactory<TplWindowFactory<MyWidget> >();
    • If you have a WindowRenderer subclass named 'MyWidgetRenderer', to add this to the system you can now simply do:
      CEGUI::WindowRendererManager::addFactory<TplWindowRendererFactory<MyWidgetRenderer> >();
    • Anybody creating a WindowRenderSet module will find that the macro system previously employed for that purpose has been removed in favour of a class based approach. As well as making the code more transparent and generally easier to set up, it also means your module just needs to export a single function that returns a CEGUI::WindowRendererModule object; all subsequent interactions are done via the returned object.

WindowManager changes

  • WindowManager::loadWindowLayout overload taking a boolean and using a random prefix is removed.

Window interface and/or behavioural changes.

  • Window::getRenderCache is removed. You probably now want to be doing something with Window::getGeometryBuffer.
  • Window::requestRedraw function is replaced by Window::invalidate function (NB: function also changes from const to non-const)
  • Window::drawSelf function has had the float z argument removed, and a const reference to a RenderingContext object argument added.
  • Protected data member RenderCache d_renderCache is removed.
  • Window::EventRenderingStarted and Window::EventRenderingEnded are now fired only when a Window object's GeometryBuffer content gets regenerated.
  • Window 'inner rect' support is now functioning as it should; this means that many layouts - especially those using FrameWindow - will need to be updated. Or put another way, child content is now positioned and sized based upon the window client area (inner rect) as opposed to the overall area - this resolves long standing issues such as content getting hidden by the titlebar when sizing / switching skins.
  • Window::d_text is now known as Window::d_textLogical.
  • Rather than manipulate Window::d_textLogical directly, you should always go via Window::setText in order for bi-directional text support to function properly (when enabled/compiled in).
  • Window::createWindow 3rd argument prefix is removed.
  • Window::getPrefix and Window::setPrefix are removed.
  • Window::recursiveChildSearch is removed.
  • Window::isHit has an added boolean argument allow_disabled, which when set to true will test for a hit if the Window is disabled. Don't forget to update the signatures of any overrides!
  • Window::getUnclippedPixelRect is renamed Window::getUnclippedOuterRect.
  • Window::getPixelRect is renamed Window::getOuterRectClipper, and should only really be used for clipping rendered content.
  • Window::getInnerRect is renamed Window::getInnerRectClipper, and should only really be used for clipping rendered content.
  • Added Window::getHitTestRect which returns the actual visible area of the outer rect - this area may not match the actual clipping area rects, which sometimes do not clip all they appear to ;)
  • Added Window::getUnclippedRect function taking a bool that indicates the inner or outer rect to be returned.
  • Added Window::getClipRect function taking a bool that indicates whether the content is for the non-client area, and so returns inner or outer clipper accordingly.
  • Window::getPixelRect_impl virtual function is removed.

WindowRenderer changes

  • WindowRenderer::getPixelRect virtual function is removed.

Renderer interface changes and related items.

For people wanting an overview of the new renderer arrangements, perhaps prior to porting an existing renderer module (or if you're looking to writing a new one), please see An Overview of Renderer Model 2 (pdf)
  • Renderer objects are no longer directly created or destroyed. Use the static create and destroy functions to create the renderer objects (or for Ogre and Irrlicht, look at the bootstrapSystem static helper functions).
  • Unused OrientationFlags enumeration is removed.
  • Renderer::addQuad function is removed. Geometry is now added directly to the per-window GeometryBuffer object(s).
  • Renderer::clearRenderList function is removed.
  • Renderer::setQueueingEnabled function is removed.
  • Renderer::isQueueingEnabled function is removed.
  • Renderer::doRender function is removed. Final rendering is now achieved by calling RenderingSurface::draw for the root RenderingSurface(s).
  • Renderer::getWidth and getHeight functions are removed.
  • Renderer::getSize function becomes Renderer::getDisplaySize returning a const Size reference.
  • Renderer::getRect function is removed.
  • Renderer::getHorzScrennDPI and Renderer::getVertScreenDPI are replaced with a single Renderer::getDisplayDPI function returning a const Vector2 reference.
  • Renderer::resetZValue function is removed.
  • Renderer::advanceZValue function is removed.
  • Renderer::getCurrentZ function is removed.
  • Renderer::getZLayer function is removed.
  • Renderer::createTexture function taking a single float value is replaced by Renderer::createTexture taking a const reference to a Size object.
  • Renderer::createResourceProvider function is removed. A DefaultResourceProvider is now used unless you explicitly provide an alternative.
  • The protected member String d_identifierString is removed.
  • The protected member ResourceProvider d_resourceProvider is removed.
  • The Renderer class is no longer derived from EventSet. The Renderer::EventDisplaySizeChanged is moved to the System object. Informing the system that the display has changed size is now achieved by calling System::notifyDisplaySizeChanged, which in turn will set the display size back on the Renderer object. This gives a fully uniform interface for this procedure, and is better than the old ad-hoc approach.

Texture interface changes.

  • Texture::getWidth and Texture::getHeight are replaced with a single Texture::getSize function returning a const Size reference.
  • Texture::getOriginalWidth and Texture::getOriginalHeight are replaced with a single Texture::getOriginalDataSize function returning a const Size reference.
  • Texture::getYScale and Texture::getXScale are replaced with a single Texture::getTexelScaling function returning a const Vector2 reference.
  • Texture::loadFromMemory replaces the float buffWidth and buffHeight arguments with a single Size object reference buffer_size argument.
  • Texture::getRenderer function is removed.

Font and FontManager changes

Image, Imageset and ImagesetManager changes

  • ImagesetManager is now derived from new NamedXMLResourceManager template class (part of resource system improvements to make things cleaner and easier to maintain).
  • ImagesetManager::createImageset functions are renamed to ImagesetManager::create (main one inherited from base class, and others for overload consistency).
  • ImagesetManager::destroyImageset functions renamed to ImagesetManager::destroy (inherited from new base class).
  • ImagesetManager::destroyAllImagesets function renamed to ImagesetManager::destroyAll (inherited from new base class).
  • ImagesetManager::isImagesetPresent function is renamed to ImagesetManager::isDefined (inherited from new base class).
  • ImagesetManager::createImagesetFromImageFile is renamed to ImagesetManager::createFromImageFile (remove verbosity / for consistency).
  • ImagesetManager::create and ImagesetManager::createFromImageFile functions return an Imageset reference rather than a pointer (to reinforce that they will never return 0)
  • ImagesetManager::getImageset function is renamed to ImagesetManager::get (inherited from new base class)
  • ImagesetManager::get returns a reference instead of a pointer (to reinforce that it will never return 0).
  • ImagesetManager::create and ImagesetManager::createFromImageFile functions have an optional XMLResourceExistsAction argument to indicate what action to take when loading an imageset with a name that already exists.
  • ImagesetManager::create overload taking a Texture pointer is replaced with a version taking a Texture reference.
  • ImagesetManager::notifyScreenResolution function renamed to ImagesetManager::notifyDisplaySizeChanged.
  • All Imageset and Image drawing functions have an added argument receiving a GeometryBuffer reference, and have had the float z argument removed.
  • Imageset constructor taking a Texture pointer is replaced with a version taking a Texture reference.
  • Imageset::notifyScreenResolution function renamed to Imageset::notifyDisplaySizeChanged.

Scheme and SchemeManager changes

  • SchemeManager is now derived from new NamedXMLResourceManager template class (part of resource system improvements to make things cleaner and easier to maintain).
  • SchemeManager::loadScheme function is renamed to SchemeManager::create (inherited from base class)
  • SchemeManager::unloadScheme function renamed to SchemeManager::destroy (inherited from new base class).
  • SchemeManager::unloadAllSchemes function renamed to SchemeManager::destroyAll (inherited from new base class).
  • SchemeManager::isSchemePresent function is renamed to SchemeManager::isDefined (inherited from new base class).
  • SchemeManager::getScheme function is renamed to SchemeManager::get (inherited from new base class)
  • SchemeManager::get returns a reference instead of a pointer (to reinforce that it will never return 0).
  • SchemeManager::create returns a reference instead of a pointer (to reinforce that it will never return 0).
  • SchemeManager::create function has an optional XMLResourceExistsAction argument to indicate what action to take when loading a scheme with a name that already exists.

Events and input handling changes

  • We have changed the way that inputs are marked as handled by the System. Generally speaking all mouse inputs are now marked as handled by the system, with the exception of events that get through to a DefaultWindow set as the root and has mouse pass-through enabled, in these cases the inject* functions will return false so you know the event was not handled by an actual UI element, and can proceed to consider the event for other functions (playfield picking etc...).
  • EventHandler::handled field is changed from a bool to a CEGUI::uint. Anywhere you previously did:
    args.handled = true;
    should be updated to:
    The boolean return values from subscribed event handlers are unchanged; the EventArgs::handled counter is increased for each subscribed handler that returns true.

Exception changes

  • CEGUI::Exception is now derived from std::exception. If you need to differentiate between the two, make sure you catch your CEGUI::Exceptions first!

Scripting and script module changes

  • ScriptWindowHelper is removed.
  • ScriptModule::getLanguage is removed.
  • LuaScriptModule object constructor made private. Construction is now to be done via the LuaScriptModule::create static function.
  • LuaScriptModule object destructor made private. Destruction is now to be done via the LuaScriptModule::destroy static function.
  • Global 'this' value that was (sometimes) available within lua event handlers is removed.

XML Config file changes

  • Old config file system has been totally replaced (old configs will no longer work). For details of the new config file support, see: CEGUI Configuration XML files.

Falagard WindowRenderer set changes