[glass] Add Alerts widget (#7219)

glass/src/lib/native/cpp/other/Alerts.cpp

@@ -0,0 +1,32 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#include "glass/other/Alerts.h"
+
+#include <IconsFontAwesome6.h>
+#include <imgui.h>
+
+using namespace glass;
+
+void glass::DisplayAlerts(AlertsModel* model) {
+  auto& infos = model->GetInfos();
+  auto& warnings = model->GetWarnings();
+  auto& errors = model->GetErrors();
+
+  const ImVec4 kWarningColor{0.85f, 0.56f, 0.0f, 1.0f};
+  const ImVec4 kErrorColor{0.9f, 0.25f, 0.25f, 1.0f};
+
+  // show higher severity alerts on top
+  for (auto&& error : errors) {
+    ImGui::TextColored(kErrorColor, "%s %s", ICON_FA_CIRCLE_XMARK,
+                       error.c_str());
+  }
+  for (auto&& warning : warnings) {
+    ImGui::TextColored(kWarningColor, "%s %s", ICON_FA_TRIANGLE_EXCLAMATION,
+                       warning.c_str());
+  }
+  for (auto&& info : infos) {
+    ImGui::Text("%s %s", ICON_FA_CIRCLE_INFO, info.c_str());
+  }
+}