Add text input events in SDL2 backend

libs/app/include/psemek/app/application.hpp

@@ -37,6 +37,7 @@ namespace psemek::app
 			std::function<void(bool)> show_cursor;
 			std::function<void(bool)> relative_mouse_mode;
 			std::function<void(bool)> windowed;
+			std::function<void(bool)> text_input;
 #if defined(PSEMEK_GRAPHICS_API_OPENGL)
 			std::function<void(bool)> vsync;
 #endif

libs/app/include/psemek/app/event_handler.hpp

@@ -16,6 +16,7 @@ namespace psemek::app
 		virtual void on_event(touch_up_event const &) {}
 		virtual void on_event(touch_move_event const &) {}
 		virtual void on_event(key_event const &) {}
+		virtual void on_event(text_input_event const &) {}
 
 		virtual ~event_handler() {}
 	};

libs/app/include/psemek/app/events.hpp

@@ -2,6 +2,8 @@
 
 #include <psemek/math/point.hpp>
 
+#include <string>
+
 namespace psemek::app
 {
 
@@ -172,4 +174,9 @@ namespace psemek::app
 		bool down;
 	};
 
+	struct text_input_event
+	{
+		std::string input;
+	};
+
 }

libs/sdl2/source/events.cpp

@@ -192,6 +192,9 @@ namespace psemek::sdl2
 			if (auto key = keycode(e.key.keysym))
 				handler.on_event(app::key_event{*key, false});
 			break;
+		case SDL_TEXTINPUT:
+			handler.on_event(app::text_input_event{e.text.text});
+			break;
 		}
 
 		return false;

libs/sdl2/source/main.cpp

@@ -48,6 +48,7 @@ int main(int argc, char ** argv) try
 	context.show_cursor = [&](bool show){ window.show_cursor(show); };
 	context.relative_mouse_mode = [&](bool mode){ window.relative_mouse_mode(mode); };
 	context.windowed = [&](bool on){ window.windowed(on); };
+	context.text_input = [](bool on){ if (on) SDL_StartTextInput(); else SDL_StopTextInput(); };
 
 #if defined(PSEMEK_GRAPHICS_API_OPENGL)
 	context.vsync = [&](bool on){ window.vsync(on); };