InputTextMultiline: Tabbing through a multi-line text editor using Im…

…GuiInputTextFlags_AllowTabInput doesn't activate it. (#3092, #5759, #787)

docs/CHANGELOG.txt

@@ -65,6 +65,9 @@ Other changes:
   (namely Selectables and Treenodes using SpanAllColumn flag) so the highlight properly covers
   all columns. (#7049, #4281, #3272)
 - InputTextMultiline: Fixed Tab character input not repeating (1.89.4 regression).
+- InputTextMultiline: Tabbing through a multi-line text editor which allows Tab character inputs
+  (using the ImGuiInputTextFlags_AllowTabInput flag) doesn't automatically activate it, in order
+  to allow passing through multiple widgets easily. (#3092, #5759, #787)
 - DragScalarN, SliderScalarN, InputScalarN, PushMultiItemsWidths: improve multi-components
   width computation to better distribute the error. (#7120, #7121) [@Nahor]
 - Menus: Tweaked hover slack logic, adding a timer to avoid situations where a slow vertical

imgui.cpp

@@ -12034,7 +12034,7 @@ void ImGui::NavMoveRequestApplyResult()
         g.NavNextActivateId = result->ID;
         g.NavNextActivateFlags = ImGuiActivateFlags_None;
         if (g.NavMoveFlags & ImGuiNavMoveFlags_IsTabbing)
-            g.NavNextActivateFlags |= ImGuiActivateFlags_PreferInput | ImGuiActivateFlags_TryToPreserveState;
+            g.NavNextActivateFlags |= ImGuiActivateFlags_PreferInput | ImGuiActivateFlags_TryToPreserveState | ImGuiActivateFlags_FromTabbing;
     }
 
     // Enable nav highlight

imgui_demo.cpp

@@ -1479,6 +1479,7 @@ static void ShowDemoWindowWidgets()
             HelpMarker("You can use the ImGuiInputTextFlags_CallbackResize facility if you need to wire InputTextMultiline() to a dynamic string type. See misc/cpp/imgui_stdlib.h for an example. (This is not demonstrated in imgui_demo.cpp because we don't want to include <string> in here)");
             ImGui::CheckboxFlags("ImGuiInputTextFlags_ReadOnly", &flags, ImGuiInputTextFlags_ReadOnly);
             ImGui::CheckboxFlags("ImGuiInputTextFlags_AllowTabInput", &flags, ImGuiInputTextFlags_AllowTabInput);
+            ImGui::SameLine(); HelpMarker("When _AllowTabInput is set, passing through the widget with Tabbing doesn't automatically activate it, in order to also cycling through subsequent widgets.");
             ImGui::CheckboxFlags("ImGuiInputTextFlags_CtrlEnterForNewLine", &flags, ImGuiInputTextFlags_CtrlEnterForNewLine);
             ImGui::InputTextMultiline("##source", text, IM_ARRAYSIZE(text), ImVec2(-FLT_MIN, ImGui::GetTextLineHeight() * 16), flags);
             ImGui::TreePop();

imgui_internal.h

@@ -1488,6 +1488,7 @@ enum ImGuiActivateFlags_
     ImGuiActivateFlags_PreferInput          = 1 << 0,       // Favor activation that requires keyboard text input (e.g. for Slider/Drag). Default for Enter key.
     ImGuiActivateFlags_PreferTweak          = 1 << 1,       // Favor activation for tweaking with arrows or gamepad (e.g. for Slider/Drag). Default for Space key and if keyboard is not used.
     ImGuiActivateFlags_TryToPreserveState   = 1 << 2,       // Request widget to preserve state if it can (e.g. InputText will try to preserve cursor/selection)
+    ImGuiActivateFlags_FromTabbing          = 1 << 3,       // Activation requested by a tabbing request
 };
 
 // Early work-in-progress API for ScrollToItem()

imgui_widgets.cpp

@@ -4126,7 +4126,11 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
         item_data_backup = g.LastItemData;
         window->DC.CursorPos = backup_pos;
 
-        // Prevent NavActivate reactivating in BeginChild().
+        // Prevent NavActivation from Tabbing when our widget accepts Tab inputs: this allows cycling through widgets without stopping.
+        if (g.NavActivateId == id && (g.NavActivateFlags & ImGuiActivateFlags_FromTabbing) && (flags & ImGuiInputTextFlags_AllowTabInput))
+            g.NavActivateId = 0;
+
+        // Prevent NavActivate reactivating in BeginChild() when we are already active.
         const ImGuiID backup_activate_id = g.NavActivateId;
         if (g.ActiveId == id) // Prevent reactivation
             g.NavActivateId = 0;