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ButtonBehavior: Fixed an edge case where changing widget type/behavior while active and using same id could lead to an assert. (#6304)

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+ Demo: use BeginDisabled() block in BackendFlags section.
I'd still consider this undefined behavior as some combination may not work properly, but let's fix things while we can as we encounter them.
This commit is contained in:
ocornut
2023-04-04 21:43:48 +02:00
parent c9fe7ebc7b
commit 47a07d8476
4 changed files with 16 additions and 9 deletions
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14
imgui_demo.cpp
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@ -483,13 +483,13 @@ void ImGui::ShowDemoWindow(bool* p_open)
"Those flags are set by the backends (imgui_impl_xxx files) to specify their capabilities.\n"
"Here we expose them as read-only fields to avoid breaking interactions with your backend.");
// Make a local copy to avoid modifying actual backend flags.
// FIXME: We don't use BeginDisabled() to keep label bright, maybe we need a BeginReadonly() equivalent..
ImGuiBackendFlags backend_flags = io.BackendFlags;
ImGui::CheckboxFlags("io.BackendFlags: HasGamepad", &backend_flags, ImGuiBackendFlags_HasGamepad);
ImGui::CheckboxFlags("io.BackendFlags: HasMouseCursors", &backend_flags, ImGuiBackendFlags_HasMouseCursors);
ImGui::CheckboxFlags("io.BackendFlags: HasSetMousePos", &backend_flags, ImGuiBackendFlags_HasSetMousePos);
ImGui::CheckboxFlags("io.BackendFlags: RendererHasVtxOffset", &backend_flags, ImGuiBackendFlags_RendererHasVtxOffset);
// FIXME: Maybe we need a BeginReadonly() equivalent to keep label bright?
ImGui::BeginDisabled();
ImGui::CheckboxFlags("io.BackendFlags: HasGamepad", &io.BackendFlags, ImGuiBackendFlags_HasGamepad);
ImGui::CheckboxFlags("io.BackendFlags: HasMouseCursors", &io.BackendFlags, ImGuiBackendFlags_HasMouseCursors);
ImGui::CheckboxFlags("io.BackendFlags: HasSetMousePos", &io.BackendFlags, ImGuiBackendFlags_HasSetMousePos);
ImGui::CheckboxFlags("io.BackendFlags: RendererHasVtxOffset", &io.BackendFlags, ImGuiBackendFlags_RendererHasVtxOffset);
ImGui::EndDisabled();
ImGui::TreePop();
ImGui::Spacing();
}