Merging PR #45: Fix deprecation warnings in IsBindable.
Replaced FKey::IsFloatAxis and FKey::IsVectorAxis calls with the corresponding FKey::IsAxis[1|2|3]D method calls.
Background: FKey::IsFloatAxis and FKey::IsVectorAxis are marked as deprecated as of UE4.26, replaced with FKey::IsAxis[1|2|3]D methods.
- Hot-reloading from inside of the editor and after recompiling from the outside should be equally supported and work together.
- Improved robustness of the delegates redirections. There should be no lost delegates when reloading (either after in-editor or outside recompilation).
- Refactored code to use the same redirection template for context and delegates container.
- Removed code allowing to register game delegates outside of the delegates container.
- Removed unused multi-context delegate that is not part of the container.
- Moved implementation of the DPI scale from context manager to context proxy.
- Passing the DPI scale to the context proxy constructor for the initial setup.
- Removed explicit PCH.
- Fixed includes to compile for all supported engine versions, including non-unity builds.
- Configured build.cs to treat ImGui as an engine module and added stricter compilation rules.
- The old DPI Scale setting was replaced by DPI Scaling Info, which contains information about scale and method of scaling.
- ImGui Context Manager handles scaling in ImGui by scaling all styles, rebuilding fonts using a different size, and raising OnFontAtlasBuilt event.
- ImGui Module Manager uses OnFontAtlasBuilt event to rebuild font textures.
- The update policy in Texture Manager was loosened to update existing resources rather than throwing an exception. This is less strict but it is now more useful since our main texture can now change. The throwing behavior used in the public interface is now handled before calling to the Texture Manager.
- Canvas size can be set to custom width and height, desktop size or viewport size.
- The old Adaptive Canvas Size is replaced by the viewport size type.
- Custom and desktop size types can be also extended to the viewport size but they will never be smaller than their base sizes.
- Adaptive size is controlled by the ImGui Widget, which passes it from the view-port to the context proxy.
- Context only copies display size that is set from the outside.
- Removed feature dependency from the manager.
- Disabled move semantics in FImGuiContextProxy and removed code related to moving ImGui context.
- Changed FImGuiContextManager to store proxies as unique pointers.
- Added to SImGuiWidget and FImGuiInputHandler handling of touch started, move and ended events.
- Events are passed to FImGuiInputState to be copied to ImGui IO as a mouse move and left button down.
- Added one frame lag between touch ending event and ending processing, to allow ImGui handle mouse-up event.
