TabBar: fixed ScrollToBar request creating bouncing loop when tab is larger than available space.

Author: ocornut

docs/CHANGELOG.txt

@@ -37,6 +37,7 @@ Other Changes:
 - ColorPicker: Made rendering aware of global style alpha of the picker can be faded out. (#2711)
   Note that some elements won't accurately fade down with the same intensity, and the color wheel
   when enabled will have small overlap glitches with (style.Alpha < 1.0).
+- TabBar: fixed ScrollToBar request creating bouncing loop when tab is larger than available space.
 - Backends: DX11: Fixed GSGetShader() call not passing an initialized instance count,
   would generally make the debug layer complain (Added in 1.72).
 - Backends: Vulkan: Added support for specifying multisample count.

imgui_widgets.cpp

@@ -6638,7 +6638,7 @@ static void ImGui::TabBarScrollToTab(ImGuiTabBar* tab_bar, ImGuiTabItem* tab)
     float tab_x1 = tab->Offset + (order > 0 ? -margin : 0.0f);
     float tab_x2 = tab->Offset + tab->Width + (order + 1 < tab_bar->Tabs.Size ? margin : 1.0f);
     tab_bar->ScrollingTargetDistToVisibility = 0.0f;
-    if (tab_bar->ScrollingTarget > tab_x1)
+    if (tab_bar->ScrollingTarget > tab_x1 || (tab_x2 - tab_x1 >= tab_bar->BarRect.GetWidth()))
     {
         tab_bar->ScrollingTargetDistToVisibility = ImMax(tab_bar->ScrollingAnim - tab_x2, 0.0f);
         tab_bar->ScrollingTarget = tab_x1;