Make DriverView fields more modular

TouchGFX/gui/include/gui/common/DataField.hpp

@@ -0,0 +1,36 @@
+#ifndef DATAFIELD_HPP
+#define DATAFIELD_HPP
+
+#include "touchgfx/TypedText.hpp"
+#include <stddef.h>
+#include <stdint.h>
+
+// We want to automatically count the number of data field types for the
+// description array. This is wacky preprocessor magic that allows us to do just
+// that. Unfortunately, it doesn't work with enum classes, so we have to use
+// C-style enums.
+#define CountedEnum(NAME, TYPE, ...)                                           \
+  enum NAME : TYPE { __VA_ARGS__ };                                            \
+  constexpr size_t NAME##_COUNT = sizeof((int[]){__VA_ARGS__}) / sizeof(int);
+
+CountedEnum(DataFieldType, size_t, DF_TSState, DF_ASState, DF_ActiveMission,
+            DF_R2DProgress, DF_INVLReady, DF_INVRReady, DF_SDC, DF_ERR,
+            DF_IniChkState, DF_LapCount, DF_TireTempFL, DF_TireTempFR,
+            DF_TireTempRL, DF_TireTempRR, DF_MinCellVolt, DF_MaxCellTemp,
+            DF_TSSoC, DF_LVSoC, DF_TSCurrent, DF_TSVoltageBat, DF_TSVoltageVeh,
+            DF_Speed, DF_BBal);
+
+enum class DataFieldKind { Numeric, Bool, Text };
+
+struct DataFieldDescription {
+  DataFieldKind kind;
+  touchgfx::TypedText title;
+  size_t int_digits;
+  size_t decimal_digits;
+
+  void* (*getValue)(void);
+};
+
+extern DataFieldDescription dataFieldDescs[];
+
+#endif // DATAFIELD_HPP