[glass] Add "About" popup with version number (#3031)

glass/CMakeLists.txt

@@ -50,9 +50,10 @@ install(DIRECTORY src/libnt/native/include/ DESTINATION "${include_dest}/glass")
 # glass application
 #
 
+configure_file(src/app/generate/WPILibVersion.cpp.in WPILibVersion.cpp)
 GENERATE_RESOURCES(src/app/native/resources generated/app/cpp GLASS glass glass_resources_src)
 
-file(GLOB glass_src src/app/native/cpp/*.cpp)
+file(GLOB glass_src src/app/native/cpp/*.cpp ${CMAKE_CURRENT_BINARY_DIR}/WPILibVersion.cpp)
 
 if (WIN32)
     set(glass_rc src/app/native/win/glass.rc)

glass/build.gradle

@@ -21,11 +21,50 @@ if (!project.hasProperty('onlylinuxathena') && !project.hasProperty('onlylinuxra
     apply from: "${rootDir}/shared/resources.gradle"
     apply from: "${rootDir}/shared/config.gradle"
 
+    def wpilibVersionFileInput = file("src/app/generate/WPILibVersion.cpp.in")
+    def wpilibVersionFileOutput = file("$buildDir/generated/app/cpp/WPILibVersion.cpp")
+
+    task generateCppVersion() {
+        description = 'Generates the wpilib version class'
+        group = 'WPILib'
+
+        outputs.file wpilibVersionFileOutput
+        inputs.file wpilibVersionFileInput
+
+        if (wpilibVersioning.releaseMode) {
+            outputs.upToDateWhen { false }
+        }
+
+        // We follow a simple set of checks to determine whether we should generate a new version file:
+        // 1. If the release type is not development, we generate a new version file
+        // 2. If there is no generated version number, we generate a new version file
+        // 3. If there is a generated build number, and the release type is development, then we will
+        //    only generate if the publish task is run.
+        doLast {
+            def version = wpilibVersioning.version.get()
+            println "Writing version ${version} to $wpilibVersionFileOutput"
+
+            if (wpilibVersionFileOutput.exists()) {
+                wpilibVersionFileOutput.delete()
+            }
+            def read = wpilibVersionFileInput.text.replace('${wpilib_version}', version)
+            wpilibVersionFileOutput.write(read)
+        }
+    }
+
+    gradle.taskGraph.addTaskExecutionGraphListener { graph ->
+        def willPublish = graph.hasTask(publish)
+        if (willPublish) {
+            generateCppVersion.outputs.upToDateWhen { false }
+        }
+    }
+
     def generateTask = createGenerateResourcesTask('app', 'GLASS', 'glass', project)
 
     project(':').libraryBuild.dependsOn build
     tasks.withType(CppCompile) {
         dependsOn generateTask
+        dependsOn generateCppVersion
     }
 
     nativeUtils.exportsConfigs {

glass/src/app/generate/WPILibVersion.cpp.in

@@ -0,0 +1,7 @@
+/*
+ * Autogenerated file! Do not manually edit this file. This version is regenerated
+ * any time the publish task is run, or when this file is deleted.
+ */
+const char* GetWPILibVersion() {
+  return "${wpilib_version}";
+}

glass/src/app/native/cpp/main.cpp

@@ -21,6 +21,8 @@
 
 namespace gui = wpi::gui;
 
+const char* GetWPILibVersion();
+
 namespace glass {
 wpi::StringRef GetResource_glass_16_png();
 wpi::StringRef GetResource_glass_32_png();
@@ -181,7 +183,29 @@ int main() {
       gPlotProvider->DisplayMenu();
       ImGui::EndMenu();
     }
+
+    bool about = false;
+    if (ImGui::BeginMenu("Info")) {
+      if (ImGui::MenuItem("About")) {
+        about = true;
+      }
+      ImGui::EndMenu();
+    }
     ImGui::EndMainMenuBar();
+
+    if (about) {
+      ImGui::OpenPopup("About");
+      about = false;
+    }
+    if (ImGui::BeginPopupModal("About")) {
+      ImGui::Text("Glass: A different kind of dashboard");
+      ImGui::Separator();
+      ImGui::Text("v%s", GetWPILibVersion());
+      if (ImGui::Button("Close")) {
+        ImGui::CloseCurrentPopup();
+      }
+      ImGui::EndPopup();
+    }
   });
 
   gui::Initialize("Glass - DISCONNECTED", 1024, 768);