Add fluent builders for more flexibly adding data to Shuffleboard (#1022)

wpilibc/src/main/native/cpp/shuffleboard/ShuffleboardInstance.cpp

@@ -0,0 +1,74 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2018 FIRST. All Rights Reserved.                             */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include "frc/shuffleboard/ShuffleboardInstance.h"
+
+#include <networktables/NetworkTable.h>
+#include <networktables/NetworkTableInstance.h>
+#include <wpi/StringMap.h>
+
+#include "frc/shuffleboard/Shuffleboard.h"
+
+using namespace frc::detail;
+
+struct ShuffleboardInstance::Impl {
+  wpi::StringMap<ShuffleboardTab> tabs;
+
+  bool tabsChanged = false;
+  std::shared_ptr<nt::NetworkTable> rootTable;
+  std::shared_ptr<nt::NetworkTable> rootMetaTable;
+};
+
+ShuffleboardInstance::ShuffleboardInstance(nt::NetworkTableInstance ntInstance)
+    : m_impl(new Impl) {
+  m_impl->rootTable = ntInstance.GetTable(Shuffleboard::kBaseTableName);
+  m_impl->rootMetaTable = m_impl->rootTable->GetSubTable(".metadata");
+}
+
+ShuffleboardInstance::~ShuffleboardInstance() {}
+
+frc::ShuffleboardTab& ShuffleboardInstance::GetTab(wpi::StringRef title) {
+  if (m_impl->tabs.find(title) == m_impl->tabs.end()) {
+    m_impl->tabs.try_emplace(title, ShuffleboardTab(*this, title));
+    m_impl->tabsChanged = true;
+  }
+  return m_impl->tabs.find(title)->second;
+}
+
+void ShuffleboardInstance::Update() {
+  if (m_impl->tabsChanged) {
+    std::vector<std::string> tabTitles;
+    for (auto& entry : m_impl->tabs) {
+      tabTitles.emplace_back(entry.second.GetTitle());
+    }
+    m_impl->rootMetaTable->GetEntry("Tabs").ForceSetStringArray(tabTitles);
+    m_impl->tabsChanged = false;
+  }
+  for (auto& entry : m_impl->tabs) {
+    auto& tab = entry.second;
+    tab.BuildInto(m_impl->rootTable,
+                  m_impl->rootMetaTable->GetSubTable(tab.GetTitle()));
+  }
+}
+
+void ShuffleboardInstance::EnableActuatorWidgets() {
+  for (auto& entry : m_impl->tabs) {
+    auto& tab = entry.second;
+    for (auto& component : tab.GetComponents()) {
+      component->EnableIfActuator();
+    }
+  }
+}
+
+void ShuffleboardInstance::DisableActuatorWidgets() {
+  for (auto& entry : m_impl->tabs) {
+    auto& tab = entry.second;
+    for (auto& component : tab.GetComponents()) {
+      component->DisableIfActuator();
+    }
+  }
+}