Allow overriding tab bar fitting policy for docked windows

[pavledev]

Version/Branch of Dear ImGui:

Version 1.92.7, Branch: docking

Back-ends:

imgui_impl_dx11.cpp + imgui_impl_win32.cpp

Compiler, OS:

Windows 11 + MSVC 2022

Details:

My Issue/Question:

Currently, ImGuiTabBarFlags_FittingPolicyMixed is always enforced for docked tab bars in DockNodeUpdateTabBar, making it impossible to use other fitting policies such as ImGuiTabBarFlags_FittingPolicyScroll.

Can the tab bar fitting policy for docked windows be made configurable?

[ocornut]

cc: #8800, #3421

Can you clarify how ImGuiTabBarFlags_FittingPolicyMixed is not sufficient for you?
I believe setting style.TabMinWidthShrink to a large value may have the same effect.

[pavledev]

I would like to use ImGuiTabBarFlags_FittingPolicyScroll so that tabs don't shrink when there are many of them.

[ocornut]

As I said, setting style.TabMinWidthShrink should have a same effect, e.g.

style.TabMinWidthShrink = FLT_MAX;

[pavledev]

You're right, setting style.TabMinWidthShrink = FLT_MAX; achieves the behavior I was looking for.

Thanks!

[ocornut]

Thanks for confirming. I have pushed f934719 with an extra comment about this.