InvisibleButton: disable navigation properly + added ImGuiButtonFlags_EnableNav to enable navigation. (#8057)

docs/CHANGELOG.txt

@@ -73,7 +73,10 @@ Other changes:
 - Nav: fixed Ctrl+Tab so when starting with no focused window it starts from the top-most
   window. (#3200)
 - Nav: rectangle highlight not rendered for items with ImGuiItemFlags_NoNav. Can be relevant
-  when e.g activating the item with mouse, then ctrl+tabbing back and forth. 
+  when e.g activating the item with mouse, then Ctrl+Tabbing back and forth. 
+- InvisibleButton, Nav: fixed an issue when InvisibleButton() would be navigable into but
+  not display navigation highlight. Properly navigation on it by default. (#8057)
+- InvisibleButton: added ImGuiButtonFlags_EnableNav to enable navigation. (#8057)
 - Tooltips: fixed incorrect tooltip positioning when using keyboard/gamepad navigation 
   (1.91.3 regression). (#8036)
 - DrawList: AddCallback() added an optional size parameter allowing to copy and

imgui.h

@@ -1744,7 +1744,7 @@ enum ImGuiButtonFlags_
     ImGuiButtonFlags_MouseButtonRight       = 1 << 1,   // React on right mouse button
     ImGuiButtonFlags_MouseButtonMiddle      = 1 << 2,   // React on center mouse button
     ImGuiButtonFlags_MouseButtonMask_       = ImGuiButtonFlags_MouseButtonLeft | ImGuiButtonFlags_MouseButtonRight | ImGuiButtonFlags_MouseButtonMiddle, // [Internal]
-    //ImGuiButtonFlags_MouseButtonDefault_  = ImGuiButtonFlags_MouseButtonLeft,
+    ImGuiButtonFlags_EnableNav              = 1 << 3,   // InvisibleButton(): do not disable navigation/tabbing. Otherwise disabled by default.
 };
 
 // Flags for ColorEdit3() / ColorEdit4() / ColorPicker3() / ColorPicker4() / ColorButton()

imgui_internal.h

@@ -947,7 +947,7 @@ enum ImGuiSelectableFlagsPrivate_
 enum ImGuiTreeNodeFlagsPrivate_
 {
     ImGuiTreeNodeFlags_ClipLabelForTrailingButton = 1 << 28,// FIXME-WIP: Hard-coded for CollapsingHeader()
-    ImGuiTreeNodeFlags_UpsideDownArrow            = 1 << 29,// FIXME-WIP: Turn Down arrow into an Up arrow, but reversed trees (#6517)
+    ImGuiTreeNodeFlags_UpsideDownArrow            = 1 << 29,// FIXME-WIP: Turn Down arrow into an Up arrow, for reversed trees (#6517)
     ImGuiTreeNodeFlags_OpenOnMask_                = ImGuiTreeNodeFlags_OpenOnDoubleClick | ImGuiTreeNodeFlags_OpenOnArrow,
 };
 

imgui_widgets.cpp

@@ -785,11 +785,12 @@ bool ImGui::InvisibleButton(const char* str_id, const ImVec2& size_arg, ImGuiBut
     ImVec2 size = CalcItemSize(size_arg, 0.0f, 0.0f);
     const ImRect bb(window->DC.CursorPos, window->DC.CursorPos + size);
     ItemSize(size);
-    if (!ItemAdd(bb, id))
+    if (!ItemAdd(bb, id, NULL, (flags & ImGuiButtonFlags_EnableNav) ? ImGuiItemFlags_None : ImGuiItemFlags_NoNav))
         return false;
 
     bool hovered, held;
     bool pressed = ButtonBehavior(bb, id, &hovered, &held, flags);
+    RenderNavHighlight(bb, id);
 
     IMGUI_TEST_ENGINE_ITEM_INFO(id, str_id, g.LastItemData.StatusFlags);
     return pressed;