gui: add popup context menu for generator

app/gui/node-editor.cpp

@@ -1917,6 +1917,18 @@ show_dynamics_inputs(generator& dyn)
 {
     ImGui::InputDouble("value", &dyn.default_value);
     ImGui::InputDouble("offset", &dyn.default_offset);
+
+    if (ImGui::Button("Select.."))
+        ImGui::OpenPopup("Select source");
+    ImGui::SameLine();
+    if (dyn.default_value_source_id == external_source_id{ 0 }) {
+        ImGui::TextUnformatted("<None>");
+    } else {
+        ImGui::Text("%" PRIu64, static_cast<u64>(dyn.default_value_source_id));
+    }
+
+    external_source src;
+    app.srcs.show_menu(src);
 }
 
 static void

app/gui/node-editor.hpp

@@ -311,6 +311,7 @@ struct sources
     irt::source::text_file* new_text_file() noexcept;
 
     void show(bool* is_show);
+    void show_menu(external_source& src);
 };
 
 struct editor

app/gui/sources.cpp

@@ -79,7 +79,7 @@ static constexpr const char* items[] = {
 };
 
 template<typename RandomGenerator, typename Distribution>
-inline void
+static void
 generate(std::ostream& os,
          RandomGenerator& gen,
          Distribution dist,
@@ -336,7 +336,7 @@ struct distribution_manager
     }
 };
 
-void
+static void
 show_random()
 {
     static distribution_manager dm;
@@ -762,4 +762,68 @@ sources::show(bool* is_show)
     ImGui::End();
 }
 
+void
+sources::show_menu(external_source& src)
+{
+    small_string<16> tmp;
+    std::pair<const int, source::constant>* constant_ptr = nullptr;
+    std::pair<const int, source::binary_file>* binary_file_ptr = nullptr;
+    std::pair<const int, source::text_file>* text_file_ptr = nullptr;
+
+    if (ImGui::BeginPopup("Select source")) {
+        if (!csts.empty() && ImGui::BeginMenu("Constant")) {
+            for (auto& elem : csts) {
+                fmt::format_to_n(tmp.begin(), tmp.capacity(), "{}", elem.first);
+                if (ImGui::MenuItem(tmp.c_str())) {
+                    constant_ptr = &elem;
+                    break;
+                }
+            }
+            ImGui::EndMenu();
+        }
+
+        if (!bins.empty() && ImGui::BeginMenu("Binary files")) {
+            for (auto& elem : bins) {
+                fmt::format_to_n(tmp.begin(), tmp.capacity(), "{}", elem.first);
+                if (ImGui::MenuItem(tmp.c_str())) {
+                    binary_file_ptr = &elem;
+                    break;
+                }
+            }
+            ImGui::EndMenu();
+        }
+
+        if (!texts.empty() && ImGui::BeginMenu("Text files")) {
+            for (auto& elem : texts) {
+                fmt::format_to_n(tmp.begin(), tmp.capacity(), "{}", elem.first);
+                if (ImGui::MenuItem(tmp.c_str())) {
+                    text_file_ptr = &elem;
+                    break;
+                }
+            }
+            ImGui::EndMenu();
+        }
+
+        if (constant_ptr != nullptr) {
+            constant_ptr->second.init(src);
+            src.id = constant_ptr->first;
+            constant_ptr = nullptr;
+        }
+
+        if (binary_file_ptr != nullptr) {
+            binary_file_ptr->second.init(src);
+            src.id = binary_file_ptr->first;
+            binary_file_ptr = nullptr;
+        }
+
+        if (text_file_ptr != nullptr) {
+            text_file_ptr->second.init(src);
+            src.id = text_file_ptr->first;
+            text_file_ptr = nullptr;
+        }
+
+        ImGui::EndPopup();
+    }
+}
+
 } // namespace irt
\ No newline at end of file

lib/include/irritator/external_source.hpp

@@ -17,6 +17,16 @@ struct constant
 {
     double value;
 
+    bool init(external_source& src)
+    {
+        src.type = 0;
+        src.id = 0;
+        src.data = &value;
+        src.index = 0;
+
+        return true;
+    }
+
     bool operator()(external_source& src)
     {
         src.index = 0;
@@ -36,6 +46,9 @@ struct binary_file
 
     bool init(external_source& src)
     {
+        src.type = 1;
+        src.id = 0;
+
         if (!ifs) {
             ifs.open(file_path);
 
@@ -45,6 +58,8 @@ struct binary_file
 
         if (!read(src))
             return false;
+
+        return true;
     }
 
     bool operator()(external_source& src)
@@ -89,6 +104,9 @@ struct text_file
 
     bool init(external_source& src)
     {
+        src.type = 2;
+        src.id = 0;
+
         if (!ifs) {
             ifs.open(file_path);
 
@@ -98,6 +116,8 @@ struct text_file
 
         if (!read(src))
             return false;
+
+        return true;
     }
 
     bool operator()(external_source& src)