Added BeginChild() variant that takes an ImGuiID

imgui.cpp

@@ -2464,6 +2464,13 @@ void ImGui::EndTooltip()
     ImGui::End();
 }
 
+void ImGui::BeginChild(ImGuiID id, ImVec2 size, bool border, ImGuiWindowFlags extra_flags)
+{
+    char str_id[32];
+    ImFormatString(str_id, IM_ARRAYSIZE(str_id), "child_%x", id);
+    ImGui::BeginChild(str_id, size, border, extra_flags);
+}
+
 void ImGui::BeginChild(const char* str_id, ImVec2 size, bool border, ImGuiWindowFlags extra_flags)
 {
     ImGuiState& g = *GImGui;

imgui.h

@@ -159,6 +159,7 @@ namespace ImGui
     IMGUI_API bool          Begin(const char* name = "Debug", bool* p_opened = NULL, ImVec2 size = ImVec2(0,0), float fill_alpha = -1.0f, ImGuiWindowFlags flags = 0);// return false when window is collapsed, so you can early out in your code. passing 'bool* p_opened' displays a Close button on the upper-right corner of the window, the pointed value will be set to false when the button is pressed.
     IMGUI_API void          End();
     IMGUI_API void          BeginChild(const char* str_id, ImVec2 size = ImVec2(0,0), bool border = false, ImGuiWindowFlags extra_flags = 0);                         // size==0.0f: use remaining window size, size<0.0f: use remaining window size minus abs(size). on each axis.
+    IMGUI_API void          BeginChild(ImGuiID id, ImVec2 size = ImVec2(0,0), bool border = false, ImGuiWindowFlags extra_flags = 0);                                 // "
     IMGUI_API void          EndChild();
     IMGUI_API bool          GetWindowIsFocused();
     IMGUI_API ImVec2        GetContentRegionMax();                                              // window or current column boundaries