Generalise the lvgl input driver in preparation for more input methods

1 files changed, 47 insertions, 0 deletions

diff --git a/src/ui/include/encoder_input.hpp b/src/ui/include/encoder_input.hpp
new file mode 100644
index 00000000..9c114e80
--- /dev/null
+++ b/src/ui/include/encoder_input.hpp
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <memory>
+
+#include "core/lv_group.h"
+#include "gpios.hpp"
+#include "hal/lv_hal_indev.h"
+
+#include "relative_wheel.hpp"
+#include "touchwheel.hpp"
+
+namespace ui {
+
+/*
+ * Main input device abstracting that handles turning lower-level input device
+ * drivers into events and LVGL inputs.
+ *
+ * As far as LVGL is concerned, this class represents an ordinary rotary
+ * encoder, supporting only left and right ticks, and clicking.
+ */
+class EncoderInput {
+ public:
+  EncoderInput(drivers::IGpios& gpios, drivers::TouchWheel& wheel);
+
+  auto Read(lv_indev_data_t* data) -> void;
+  auto registration() -> lv_indev_t* { return registration_; }
+
+  auto lock(bool l) -> void { is_locked_ = l; }
+
+ private:
+  lv_indev_drv_t driver_;
+  lv_indev_t* registration_;
+
+  drivers::IGpios& gpios_;
+  drivers::TouchWheel& raw_wheel_;
+  std::unique_ptr<drivers::RelativeWheel> relative_wheel_;
+
+  bool is_locked_;
+};
+
+}  // namespace ui