Generalise the lvgl input driver in preparation for more input methods

1 files changed, 46 insertions, 0 deletions

diff --git a/src/ui/encoder_input.cpp b/src/ui/encoder_input.cpp
new file mode 100644
index 00000000..62cb4c8b
--- /dev/null
+++ b/src/ui/encoder_input.cpp
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "encoder_input.hpp"
+
+#include <sys/_stdint.h>
+#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 {
+
+static void encoder_read(lv_indev_drv_t* drv, lv_indev_data_t* data) {
+  EncoderInput* instance = reinterpret_cast<EncoderInput*>(drv->user_data);
+  instance->Read(data);
+}
+
+EncoderInput::EncoderInput(drivers::IGpios& gpios, drivers::TouchWheel& wheel)
+    : gpios_(gpios),
+      raw_wheel_(wheel),
+      relative_wheel_(std::make_unique<drivers::RelativeWheel>(wheel)) {
+  lv_indev_drv_init(&driver_);
+  driver_.type = LV_INDEV_TYPE_ENCODER;
+  driver_.read_cb = encoder_read;
+  driver_.user_data = this;
+
+  registration_ = lv_indev_drv_register(&driver_);
+}
+
+auto EncoderInput::Read(lv_indev_data_t* data) -> void {
+  raw_wheel_.Update();
+  relative_wheel_->Update();
+
+  data->enc_diff = relative_wheel_->ticks();
+  data->state = relative_wheel_->is_clicking() ? LV_INDEV_STATE_PRESSED
+                                               : LV_INDEV_STATE_RELEASED;
+}
+
+}  // namespace ui