[FL-2627] Flipper applications: SDK, build and debug system (#1387)

applications/services/gui/modules/widget_elements/widget_element.h

@@ -0,0 +1,22 @@
+/**
+ * @file widget_element_i.h
+ * GUI: internal Widget Element API
+ */
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+    GuiButtonTypeLeft,
+    GuiButtonTypeCenter,
+    GuiButtonTypeRight,
+} GuiButtonType;
+
+typedef void (*ButtonCallback)(GuiButtonType result, InputType type, void* context);
+
+#ifdef __cplusplus
+}
+#endif