Tab Bar: Keep tab item close button visible while dragging a tab (independent of hovering state).

Improve 08108cf

docs/CHANGELOG.txt

@@ -49,7 +49,7 @@ Other Changes:
   rather than the Mouse Down+Up sequence, even if the _OpenOnArrow flag isn't set. This is standard behavior 
   and amends the change done in 1.76 which only affected cases were _OpenOnArrow flag was set. 
   (This is also necessary to support full multi/range-select/drag and drop operations.)
-- Tab Bar: Hide tab item close button while dragging a tab.
+- Tab Bar: Keep tab item close button visible while dragging a tab (independent of hovering state).
 - Metrics: Various tweaks, listing windows front-to-back, greying inactive items when possible.
 - Demo: Add simple InputText() callbacks demo (aside from the more elaborate ones in 'Examples->Console').
 - Examples: Vulkan: Reworked buffer resize handling, fix for Linux/X11. (#3390, #2626) [@RoryO]

imgui_widgets.cpp

@@ -7453,8 +7453,7 @@ bool    ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
         SetItemAllowOverlap();
 
     // Drag and drop: re-order tabs
-    const bool is_dragging = (held && !tab_appearing && IsMouseDragging(0));
-    if (is_dragging)
+    if (held && !tab_appearing && IsMouseDragging(0))
     {
         if (!g.DragDropActive && (tab_bar->Flags & ImGuiTabBarFlags_Reorderable))
         {
@@ -7497,7 +7496,7 @@ bool    ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
         flags |= ImGuiTabItemFlags_NoCloseWithMiddleMouseButton;
 
     // Render tab label, process close button
-    const ImGuiID close_button_id = (p_open && !is_dragging) ? window->GetID((void*)((intptr_t)id + 1)) : 0;
+    const ImGuiID close_button_id = p_open ? window->GetID((void*)((intptr_t)id + 1)) : 0;
     bool just_closed = TabItemLabelAndCloseButton(display_draw_list, bb, flags, tab_bar->FramePadding, label, id, close_button_id, tab_contents_visible);
     if (just_closed && p_open != NULL)
     {
@@ -7609,7 +7608,7 @@ bool ImGui::TabItemLabelAndCloseButton(ImDrawList* draw_list, const ImRect& bb,
     bool close_button_visible = false;
     if (close_button_id != 0)
         if (is_contents_visible || bb.GetWidth() >= g.Style.TabMinWidthForUnselectedCloseButton)
-            if (g.HoveredId == tab_id || g.HoveredId == close_button_id || g.ActiveId == close_button_id)
+            if (g.HoveredId == tab_id || g.HoveredId == close_button_id || g.ActiveId == tab_id || g.ActiveId == close_button_id)
                 close_button_visible = true;
     if (close_button_visible)
     {