making config editable

engine/src/ui/panel.cpp

@@ -1,18 +1,43 @@
 #include <imgui.h>
+#include <imgui_internal.h>
 
 #include <sophia/ui/panel.hpp>
 
 namespace sophia {
 
-void Panel::draw(const FrameInfo& frameInfo) {
-  ImGuiWindowFlags flags = ImGuiWindowFlags_None;
-  if (config.locked) {
+ImGuiWindowFlags Panel::Config::getWindowFlags() const {
+  ImGuiWindowFlags flags = windowFlags;
+  if (locked) {
     flags |= ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize |
-             ImGuiWindowFlags_NoDocking | ImGuiWindowFlags_NoCollapse;
+             ImGuiWindowFlags_NoCollapse;
   }
+  return flags;
+}
 
-  const ImGuiCond cond =
-      config.locked ? ImGuiCond_Always : ImGuiCond_FirstUseEver;
+ImGuiDockNodeFlags Panel::Config::getDockNodeFlags() const {
+  ImGuiDockNodeFlags flags = dockNodeFlags;
+  if (locked) {
+    flags |= static_cast<int>(ImGuiDockNodeFlags_NoUndocking) |
+             static_cast<int>(ImGuiDockNodeFlags_NoResize) |
+             static_cast<int>(ImGuiDockNodeFlags_NoCloseButton) |
+             static_cast<int>(ImGuiDockNodeFlags_NoDockingOverMe) |
+             static_cast<int>(ImGuiDockNodeFlags_NoDockingSplit);
+  }
+  return flags;
+}
+
+bool Panel::Config::hasCloseButton() const { return closable && !locked; }
+
+ImGuiCond Panel::Config::getPlacementCond() const {
+  return locked ? ImGuiCond_Always : ImGuiCond_FirstUseEver;
+}
+
+void Panel::draw(const FrameInfo& frameInfo) {
+  ImGuiWindowClass windowClass;
+  windowClass.DockNodeFlagsOverrideSet = config.getDockNodeFlags();
+  ImGui::SetNextWindowClass(&windowClass);
+
+  const ImGuiCond cond = config.getPlacementCond();
   if (config.size.x > 0.0f || config.size.y > 0.0f) {
     ImGui::SetNextWindowSize(ImVec2(config.size.x, config.size.y), cond);
   }
@@ -22,8 +47,8 @@ void Panel::draw(const FrameInfo& frameInfo) {
   }
 
   bool open = true;
-  const bool showCloseButton = config.closable && !config.locked;
-  ImGui::Begin(config.name.c_str(), showCloseButton ? &open : nullptr, flags);
+  ImGui::Begin(config.name.c_str(), config.hasCloseButton() ? &open : nullptr,
+               config.getWindowFlags());
   onUpdate(frameInfo);
   ImGui::End();