Make namespaces more consistent (#92)

Tactility/Source/lvgl/LvglKeypad.h

@@ -0,0 +1,34 @@
+/**
+ * This code relates to the hardware keyboard support also known as "keypads" in LVGL.
+ */
+#pragma once
+
+#include "lvgl.h"
+
+namespace tt::lvgl {
+
+/**
+ * @return true if LVGL is configured with a keypad
+ */
+bool keypad_is_available();
+
+/**
+ * Set the keypad.
+ * @param device the keypad device
+ */
+void keypad_set_indev(lv_indev_t* device);
+
+/**
+ * Activate the keypad for a widget group.
+ * @param group
+ */
+void keypad_activate(lv_group_t* group);
+
+/**
+ * Deactivate the keypad for the current widget group (if any).
+ * You don't have to call this after calling _activate() because widget
+ * cleanup automatically removes itself from the group it belongs to.
+ */
+void keypad_deactivate();
+
+} // namespace