Internals: Added FindWindowByID() helper. (#2190)

imgui.cpp

@@ -4220,13 +4220,18 @@ static void SetWindowConditionAllowFlags(ImGuiWindow* window, ImGuiCond flags, b
     window->SetWindowCollapsedAllowFlags = enabled ? (window->SetWindowCollapsedAllowFlags | flags) : (window->SetWindowCollapsedAllowFlags & ~flags);
 }
 
-ImGuiWindow* ImGui::FindWindowByName(const char* name)
+ImGuiWindow* ImGui::FindWindowByID(ImGuiID id)
 {
     ImGuiContext& g = *GImGui;
-    ImGuiID id = ImHash(name, 0);
     return (ImGuiWindow*)g.WindowsById.GetVoidPtr(id);
 }
 
+ImGuiWindow* ImGui::FindWindowByName(const char* name)
+{
+    ImGuiID id = ImHash(name, 0);
+    return FindWindowByID(id);
+}
+
 static ImGuiWindow* CreateNewWindow(const char* name, ImVec2 size, ImGuiWindowFlags flags)
 {
     ImGuiContext& g = *GImGui;

imgui_internal.h

@@ -1123,6 +1123,7 @@ namespace ImGui
     // - You are calling ImGui functions after ImGui::EndFrame()/ImGui::Render() and before the next ImGui::NewFrame(), which is also illegal.
     inline    ImGuiWindow*  GetCurrentWindowRead()      { ImGuiContext& g = *GImGui; return g.CurrentWindow; }
     inline    ImGuiWindow*  GetCurrentWindow()          { ImGuiContext& g = *GImGui; g.CurrentWindow->WriteAccessed = true; return g.CurrentWindow; }
+    IMGUI_API ImGuiWindow*  FindWindowByID(ImGuiID id);
     IMGUI_API ImGuiWindow*  FindWindowByName(const char* name);
     IMGUI_API void          FocusWindow(ImGuiWindow* window);
     IMGUI_API void          FocusPreviousWindowIgnoringOne(ImGuiWindow* ignore_window);