Tab Item gets mixed up with nameless widget when the window is docked

[Husenap]

Branch: docking
Commit: 3233d85
Back-ends: imgui_impl_glfw.cpp + imgui_impl_opengl3.cpp
Compiler: MSVC

Hello!

I noticed multiple things that are behaving weirdly when having a widget without a name.

I would also like to know if it is considered "wrong" or "bad practice" to have a widget without a name, according to imgui?

• The window gets undocked if you drag the widget
• The TabItem seems to think it is the widget
• If you click the widget the TabItem lights up, and vice versa
• If you click and drag the TabItem, the widget will think it's being dragged.

static float f1 = 0.f;
ImGui::Begin("working_example");
ImGui::DragFloat("drag me", &f1);
ImGui::End();
static float f2 = 0.f;
ImGui::Begin("broken_example");
ImGui::DragFloat("", &f2);
ImGui::End();

[ocornut]

I expect to make a change to tab/dockable window id, but essentially you are having an id conflict with the window id itself and an empty label without id at the root of a window was always illegal. **Please read the FAQ about id, label and id stack. **

[Husenap]

It was just me using the ID wrong, it was easily fixed by adding ##ID without any text, I don't know why I never thought of that at the time :)