Note that this commit contains a minor breaking change for custom implementations of UImGuiInputHandler.
- Changed "ImGui.SwitchInputMode" command name to "ImGui.ToggleInput".
- Changed SwitchInputModeKey property in settings to ToggleInput.
- Added temporary mechanism protecting from losing data by moving it from SwitchInputModeKey to ToggleInput and removing deprecated entry from the default config file.
- Renamed UImGuiInputHandler protected function from IsSwitchInputModeEvent to IsToggleInputEvent, so custom implementations of that class may require update.
- Moved property variables to ImGui Module Properties.
- Moved console command to ImGui Module Commands (one for now but more will be added).
- ImGui Module Commands is created by ImGui Module Manager, what means that commands are registered after module is loaded and unregistered when it is unloaded.
- Updated settings to allow more convenient use: Added global pointer to default object and event raised when it is loaded.
- Added common debug config file for module-wide debug symbols and loggers.
- Added IMGUI_MODULE_DEVELOPER symbol to enable or disable module developer mode, that is intended to add additional module debug options hidden from normal usage.
- ImGui Widget debug is only available in developer mode because in normal usage it adds noise to ImGui console variables while not being very useful.
- Merged LogImGuiInputHandler and LogImGuiInputHandlerFactory loggers as they are part of the same feature.
- Renamed LogImGuiInputState to LogImGuiInput.
- Replaced 'ImGui.DebugDrawOnWorldTick' with DRAW_EVENTS_ON_WORLD_TICK_START switch to enforce consistency in project setup.
- Added DRAW_EVENTS_ON_POST_ACTOR_TICK to support post actor tick events (only for UE 4.18 or later).
- Added DRAW_EVENTS_ORDER_WORLD_BEFORE_MULTI_CONTEXT to allow explicitly define order between multi-context and world-context draw events.
- Rules can be configured in ImGui.Build.cs file.
- Changed module type to 'Developer'.
- Added runtime loader that handles automatic module loading in runtime builds (feature can be selectively enabled).
- Added ImGuiTextureHandle that is implicitly convertible to ImTextureID and can be used directly with ImGui interface.
- Added to ImGui Module interface allowing to register, update and release textures or find handles to existing resources.
- Refactored Texture Manager and added functions allowing create, update or release resources for user textures.
- Loosened resource verification policy in Texture Manager to work smoothly with external requests and to handle gracefully situations when invalid texture id is passed to ImGui.
- Introduced ‘error texture’ that is used for invalid resources.
- Fixed rather embarrassing overlook in deallocation of data array passed from to CreateTexture from other function.
- Changed CreateTexture to use cleanup function passed with data (optional and only needed if data need to be released). Keeping data allocation and deallocation code together should make bugs like this easier to spot and avoid. Additionally this allows for more generic usage.
- Added ImGui Input Handler class that allows to customize handling of the keyboard and gamepad input.
- Added ImGui Settings to allow specify custom input handler implementation.
- Added editor support for ImGui Settings.
- Input handling in ImGui Widget is divided for querying the handler (more customizable) and actual input processing based on the handler’s response (fixed and simplified).
- Removed a need for checking console state in different input handling functions in ImGui Widget by suppressing keyboard focus support when console is opened.
- Split tick and textures initializations.
- Supporting deferred tick initialization, if Slate application is not ready during module startup.
- Textures are lazy-loaded before the first use.
- ImGui Context Manager initializes font atlas to make sure that ImGui resources are always initialized.
- Updated InputNavigation CVar to support 1: keyboard navigation, 2: gamepad navigation and 3: keyboard + gamepad navigation simultaneously.
- Added ImGui interoperability utilities mapping gamepad input events to values in ImGui navigation inputs array.
- Added to ImGui Input State support for gamepad navigation inputs.
- Refactored ImGui Input State to keep consistent interface for keyboard, mouse and gamepad updates.
- Upgraded ImGui framework to 1.61 WIP, which adds a few improvements to context management.
- Removed from plugin implementation all the references to default ImGui context.
- Removed from ImGui Context Proxy destructor code switching to default ImGui context (there is no default context and decision is left for a higher level manager when to switch and to what context).
- Added own font atlas that is shared by all contexts and used explicitly to create Slate resources.
- Removed from ImGui Context Proxy workaround that was previously needed for copying cursor data to dynamically created contexts.
- Removed explicit saving of context settings before its destruction as this is now handled in ImGui::DestroyContext().
- Reimplemented ImGuiImplementation::GetCursorData() to use new interface.
Map mode allows to reach areas of the canvas that otherwise would be inaccessible (for instance modal windows positioned in the centre of the canvas) and to modify which part should be visible by default.
- ImGui Context Proxy Tick function has been split for Tick and Draw. Both functions may now be called separately from different places but they will be processed only once per frame. This opens possibility to define own mechanisms to trigger draw events and to independently update contexts.
- Multi-context draw event delegate is passed to ImGui Context Proxy during construction rather than as an argument of Tick function.
- To minimise lag between ending ImGui frame and rendering its output, ImGui Widget updates its own context just before painting.
- Contexts without widget (editor, dedicated server) are updated by manager during post-tick event.
- Instead of setting global CurrentContextIndex by ImGui Context Manager, information about context is passed to ImGui Demo as part of a closure.
- Fixed bug in ImGui Demo where inactive contexts were triggering multi-PIE warning.
Using ImGui to draw cursor helps to reduce visual error between mouse cursor and position in ImGui. But it has been reported that this works really bad when frame-rate drops and becomes unusable below ~20 FPS. Taking that into account hardware cursor seems like a better default option. Old behaviour can be enabled with ImGui.DrawMouseCursor console variable.
- Removed usage of per-vertex ClipRect.
- Replaced usage of GSlateScissorRect with new FSlateWindowElementList::PushClip/PopClip functions.
- Defined WITH_OBSOLETE_CLIPPING_API to switch to old implementation for older engine versions.
