Basic node properties editor.

src/AnimGraphEditor.cc

@@ -26,6 +26,52 @@ ImNodesPinShape sGetSocketShapeFromSocketType(const SocketType& socket_type) {
   return ImNodesPinShape_Quad;
 }
 
+void AnimGraphEditorRenderSidebar(AnimNodeResource& node_resource) {
+  ImGui::Text("[%s]", node_resource.m_type_name.c_str());
+
+  char node_name_buffer[256];
+  memset(node_name_buffer, 0, sizeof(node_name_buffer));
+  strncpy(
+      node_name_buffer,
+      node_resource.m_name.c_str(),
+      std::min(node_resource.m_name.size(), sizeof(node_name_buffer)));
+
+  if (ImGui::InputText("Name", node_name_buffer, sizeof(node_name_buffer))) {
+    node_resource.m_name = node_name_buffer;
+  }
+
+  int num_properties = node_resource.m_socket_accessor->m_properties.size();
+  for (int i = 0; i < num_properties; i++) {
+    Socket& property = node_resource.m_socket_accessor->m_properties[i];
+    if (property.m_type == SocketType::SocketTypeFloat) {
+      ImGui::SliderFloat(
+          property.m_name.c_str(),
+          reinterpret_cast<float*>(property.m_value.ptr),
+          -100.f,
+          100.f);
+    } else if (property.m_type == SocketType::SocketTypeBool) {
+      ImGui::Checkbox(
+          property.m_name.c_str(),
+          reinterpret_cast<bool*>(property.m_value.ptr));
+    } else if (property.m_type == SocketType::SocketTypeString) {
+      std::string* property_string =
+          reinterpret_cast<std::string*>(property.m_value.ptr);
+      char string_buf[256];
+      memset(string_buf, 0, sizeof(string_buf));
+      strncpy(
+          string_buf,
+          property_string->c_str(),
+          std::min(property_string->size(), sizeof(string_buf)));
+      if (ImGui::InputText(
+              property.m_name.c_str(),
+              string_buf,
+              sizeof(string_buf))) {
+        (*property_string) = string_buf;
+      }
+    }
+  }
+}
+
 void AnimGraphEditorUpdate() {
   static AnimGraphResource graph_resource = AnimGraphResource();
 
@@ -58,6 +104,11 @@ void AnimGraphEditorUpdate() {
 
   ImGui::EndMenuBar();
 
+  ImGui::Columns(2);
+
+  //
+  // Node editor canvas
+  //
   ImNodes::BeginNodeEditor();
 
   // Popup menu
@@ -128,7 +179,8 @@ void AnimGraphEditorUpdate() {
           ImColor(255, 255, 255, 255));
       ImGui::Text(socket.m_name.c_str());
 
-      ImNodes::PushAttributeFlag(ImNodesAttributeFlags_EnableLinkDetachWithDragClick);
+      ImNodes::PushAttributeFlag(
+          ImNodesAttributeFlags_EnableLinkDetachWithDragClick);
       ImNodes::EndInputAttribute();
     }
 
@@ -142,19 +194,21 @@ void AnimGraphEditorUpdate() {
           sGetSocketShapeFromSocketType(socket.m_type),
           ImColor(255, 255, 255, 255));
       ImGui::Text(socket.m_name.c_str());
-      ImNodes::PushAttributeFlag(ImNodesAttributeFlags_EnableLinkDetachWithDragClick);
+      ImNodes::PushAttributeFlag(
+          ImNodesAttributeFlags_EnableLinkDetachWithDragClick);
       ImNodes::EndInputAttribute();
     }
 
     // Graph output node
     if (i == 0) {
       if (ImGui::Button("+Output")) {
-        AnimNodeResource& graph_output_node = graph_resource.getGraphOutputNode();
+        AnimNodeResource& graph_output_node =
+            graph_resource.getGraphOutputNode();
 
         static float bla = 0.f;
         std::string socket_name = "Output";
-        socket_name +=
-            std::to_string(graph_output_node.m_socket_accessor->m_inputs.size());
+        socket_name += std::to_string(
+            graph_output_node.m_socket_accessor->m_inputs.size());
         graph_output_node.m_socket_accessor->RegisterInput<float>(
             socket_name,
             nullptr);
@@ -165,8 +219,8 @@ void AnimGraphEditorUpdate() {
 
         static float bla = 0.f;
         std::string socket_name = "Input";
-        socket_name +=
-            std::to_string(graph_input_node.m_socket_accessor->m_outputs.size());
+        socket_name += std::to_string(
+            graph_input_node.m_socket_accessor->m_outputs.size());
         graph_input_node.m_socket_accessor->RegisterOutput<float>(
             socket_name,
             nullptr);
@@ -220,6 +274,25 @@ void AnimGraphEditorUpdate() {
   // Handle link detachements.
   int link_id = 0;
   if (ImNodes::IsLinkDestroyed(&link_id)) {
-    graph_resource.m_connections.erase(graph_resource.m_connections.begin() + link_id);
+    graph_resource.m_connections.erase(
+        graph_resource.m_connections.begin() + link_id);
   }
+
+  int selected_nodes[ImNodes::NumSelectedNodes()];
+  ImNodes::GetSelectedNodes(selected_nodes);
+
+  //
+  // Sidebar
+  //
+  ImGui::NextColumn();
+
+  if (ImNodes::NumSelectedNodes() == 1) {
+    if (selected_nodes[0] < graph_resource.m_nodes.size()) {
+      AnimNodeResource& selected_node =
+          graph_resource.m_nodes[selected_nodes[0]];
+      AnimGraphEditorRenderSidebar(selected_node);
+    }
+  }
+
+  ImGui::Columns(1);
 }

src/AnimGraphResource.cc

@@ -144,6 +144,14 @@ AnimGraphConnection sAnimGraphConnectionFromJson(const json& json_node) {
 
 void AnimGraphResource::clear() {
   m_name = "";
+
+  clearNodes();
+  m_connections.clear();
+
+  initGraphConnectors();
+}
+
+void AnimGraphResource::clearNodes() {
   for (size_t i = 0; i < m_nodes.size(); i++) {
     delete m_nodes[i].m_socket_accessor;
     m_nodes[i].m_socket_accessor = nullptr;
@@ -151,13 +159,13 @@ void AnimGraphResource::clear() {
     m_nodes[i].m_anim_node = nullptr;
   }
   m_nodes.clear();
+}
 
+void AnimGraphResource::initGraphConnectors() {
   m_nodes.push_back(AnimNodeResourceFactory("BlendTree"));
   m_nodes[0].m_name = "Outputs";
   m_nodes.push_back(AnimNodeResourceFactory("BlendTree"));
   m_nodes[1].m_name = "Inputs";
-
-  m_connections.clear();
 }
 
 bool AnimGraphResource::saveToFile(const char* filename) const {
@@ -220,6 +228,7 @@ bool AnimGraphResource::loadFromFile(const char* filename) {
   }
 
   clear();
+  clearNodes();
 
   m_name = json_data["name"];
   for (size_t i = 0; i < json_data["nodes"].size(); i++) {

src/AnimGraphResource.h

@@ -337,6 +337,8 @@ struct AnimGraphResource {
   AnimGraphResource() { clear(); }
 
   void clear();
+  void clearNodes();
+  void initGraphConnectors();
   bool saveToFile(const char* filename) const;
   bool loadFromFile(const char* filename);