Files
rmlui-app-template/vendor/rmlui_backend/RmlUi_Platform_SDL.h
2026-07-11 17:01:42 -05:00

79 lines
2.5 KiB
C++

#pragma once
#include <RmlUi/Core/Input.h>
#include <RmlUi/Core/SystemInterface.h>
#include <RmlUi/Core/TextInputHandler.h>
#include <RmlUi/Core/Types.h>
#if RMLUI_SDL_VERSION_MAJOR == 3
#include <SDL3/SDL.h>
#elif RMLUI_SDL_VERSION_MAJOR == 2
#include <SDL.h>
#else
#error "Unspecified RMLUI_SDL_VERSION_MAJOR. Please set this definition to the major version of the SDL library being linked to."
#endif
class SystemInterface_SDL : public Rml::SystemInterface {
public:
SystemInterface_SDL(SDL_Window* window);
~SystemInterface_SDL();
// -- Inherited from Rml::SystemInterface --
double GetElapsedTime() override;
void SetMouseCursor(const Rml::String& cursor_name) override;
void SetClipboardText(const Rml::String& text) override;
void GetClipboardText(Rml::String& text) override;
void ActivateKeyboard(Rml::Vector2f caret_position, float line_height) override;
void DeactivateKeyboard() override;
private:
SDL_Window* window = nullptr;
SDL_Cursor* cursor_default = nullptr;
SDL_Cursor* cursor_move = nullptr;
SDL_Cursor* cursor_pointer = nullptr;
SDL_Cursor* cursor_resize = nullptr;
SDL_Cursor* cursor_cross = nullptr;
SDL_Cursor* cursor_text = nullptr;
SDL_Cursor* cursor_unavailable = nullptr;
};
namespace RmlSDL {
// Applies input on the context based on the given SDL event.
//
// Note (SDL3 + SDL_Renderer): When using SDL_SetRenderLogicalPresentation(), SDL_Renderer operates in render
// coordinates (logical coordinates). Therefore, before passing an SDL_Event to InputEventHandler, input event
// coordinates (mouse/touch/etc.) should be converted to render coordinates, e.g.
// SDL_ConvertEventToRenderCoordinates(renderer, &ev).
// @return True if the event is still propagating, false if it was handled by the context.
bool InputEventHandler(Rml::Context* context, SDL_Window* window, SDL_Event& ev);
// Converts the SDL key to RmlUi key.
Rml::Input::KeyIdentifier ConvertKey(int sdl_key);
// Converts the SDL mouse button to RmlUi mouse button.
int ConvertMouseButton(int sdl_mouse_button);
// Returns the active RmlUi key modifier state.
int GetKeyModifierState();
} // namespace RmlSDL
class TextInputMethodEditor_SDL final : public Rml::TextInputHandler {
public:
void OnActivate(Rml::TextInputContext* input_context) override;
void OnDeactivate(Rml::TextInputContext* input_context) override;
void OnDestroy(Rml::TextInputContext* input_context) override;
void HandleEdit(const SDL_TextEditingEvent& ev);
private:
Rml::TextInputContext* context = nullptr;
int start = 0, end = 0;
};