Nav, Combo: removed unnecessary window->LastNavIds[] assignment in combo code. + minor renaming.

imgui.cpp

@@ -8529,7 +8529,7 @@ ImVec2 ImGui::FindBestWindowPosForPopupEx(const ImVec2& ref_pos, const ImVec2& s
 }
 
 // Note that this is used for popups, which can overlap the non work-area of individual viewports.
-ImRect ImGui::GetWindowAllowedExtentRect(ImGuiWindow* window)
+ImRect ImGui::GetPopupAllowedExtentRect(ImGuiWindow* window)
 {
     ImGuiContext& g = *GImGui;
     IM_UNUSED(window);
@@ -8543,7 +8543,7 @@ ImVec2 ImGui::FindBestWindowPosForPopup(ImGuiWindow* window)
 {
     ImGuiContext& g = *GImGui;
 
-    ImRect r_outer = GetWindowAllowedExtentRect(window);
+    ImRect r_outer = GetPopupAllowedExtentRect(window);
     if (window->Flags & ImGuiWindowFlags_ChildMenu)
     {
         // Child menus typically request _any_ position within the parent menu item, and then we move the new menu outside the parent bounds.

imgui_internal.h

@@ -2288,7 +2288,6 @@ namespace ImGui
     IMGUI_API bool          IsWindowChildOf(ImGuiWindow* window, ImGuiWindow* potential_parent);
     IMGUI_API bool          IsWindowAbove(ImGuiWindow* potential_above, ImGuiWindow* potential_below);
     IMGUI_API bool          IsWindowNavFocusable(ImGuiWindow* window);
-    IMGUI_API ImRect        GetWindowAllowedExtentRect(ImGuiWindow* window);
     IMGUI_API void          SetWindowPos(ImGuiWindow* window, const ImVec2& pos, ImGuiCond cond = 0);
     IMGUI_API void          SetWindowSize(ImGuiWindow* window, const ImVec2& size, ImGuiCond cond = 0);
     IMGUI_API void          SetWindowCollapsed(ImGuiWindow* window, bool collapsed, ImGuiCond cond = 0);
@@ -2396,6 +2395,7 @@ namespace ImGui
     IMGUI_API bool          IsPopupOpen(ImGuiID id, ImGuiPopupFlags popup_flags);
     IMGUI_API bool          BeginPopupEx(ImGuiID id, ImGuiWindowFlags extra_flags);
     IMGUI_API void          BeginTooltipEx(ImGuiWindowFlags extra_flags, ImGuiTooltipFlags tooltip_flags);
+    IMGUI_API ImRect        GetPopupAllowedExtentRect(ImGuiWindow* window);
     IMGUI_API ImGuiWindow*  GetTopMostPopupModal();
     IMGUI_API ImVec2        FindBestWindowPosForPopup(ImGuiWindow* window);
     IMGUI_API ImVec2        FindBestWindowPosForPopupEx(const ImVec2& ref_pos, const ImVec2& size, ImGuiDir* last_dir, const ImRect& r_outer, const ImRect& r_avoid, ImGuiPopupPositionPolicy policy);

imgui_widgets.cpp

@@ -1568,8 +1568,7 @@ bool ImGui::BeginCombo(const char* label, const char* preview_value, ImGuiComboF
 
     const float arrow_size = (flags & ImGuiComboFlags_NoArrowButton) ? 0.0f : GetFrameHeight();
     const ImVec2 label_size = CalcTextSize(label, NULL, true);
-    const float expected_w = CalcItemWidth();
-    const float w = (flags & ImGuiComboFlags_NoPreview) ? arrow_size : expected_w;
+    const float w = (flags & ImGuiComboFlags_NoPreview) ? arrow_size : CalcItemWidth();
     const ImRect frame_bb(window->DC.CursorPos, window->DC.CursorPos + ImVec2(w, label_size.y + style.FramePadding.y * 2.0f));
     const ImRect total_bb(frame_bb.Min, frame_bb.Max + ImVec2(label_size.x > 0.0f ? style.ItemInnerSpacing.x + label_size.x : 0.0f, 0.0f));
     ItemSize(total_bb, style.FramePadding.y);
@@ -1608,8 +1607,6 @@ bool ImGui::BeginCombo(const char* label, const char* preview_value, ImGuiComboF
 
     if ((pressed || g.NavActivateId == id) && !popup_open)
     {
-        if (window->DC.NavLayerCurrent == 0)
-            window->NavLastIds[0] = id;
         OpenPopupEx(popup_id, ImGuiPopupFlags_None);
         popup_open = true;
     }
@@ -1644,11 +1641,8 @@ bool ImGui::BeginCombo(const char* label, const char* preview_value, ImGuiComboF
         {
             // Always override 'AutoPosLastDirection' to not leave a chance for a past value to affect us.
             ImVec2 size_expected = CalcWindowNextAutoFitSize(popup_window);
-            if (flags & ImGuiComboFlags_PopupAlignLeft)
-                popup_window->AutoPosLastDirection = ImGuiDir_Left; // "Below, Toward Left"
-            else
-                popup_window->AutoPosLastDirection = ImGuiDir_Down; // "Below, Toward Right (default)"
-            ImRect r_outer = GetWindowAllowedExtentRect(popup_window);
+            popup_window->AutoPosLastDirection = (flags & ImGuiComboFlags_PopupAlignLeft) ? ImGuiDir_Left : ImGuiDir_Down; // Left = "Below, Toward Left", Down = "Below, Toward Right (default)"
+            ImRect r_outer = GetPopupAllowedExtentRect(popup_window);
             ImVec2 pos = FindBestWindowPosForPopupEx(frame_bb.GetBL(), size_expected, &popup_window->AutoPosLastDirection, r_outer, frame_bb, ImGuiPopupPositionPolicy_ComboBox);
             SetNextWindowPos(pos);
         }