imgui-node-editor

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It seems like Node Editor can not initialize correctly when the ImGui::GetContentRegionAvail() returns an {0, 0} (or {-123,-456}, etc.)...

But If I have a complex layout ( I am using the docking branch of imgui ), there may be such a moment that the "region" is (0,0) or even minus numbers.

And Node Editor will definitely throw an error!

For now, I fix it with a simple "if" check.

                        ImGui::Begin("##window");
                        auto size = ImGui::GetContentRegionAvail();
			if (size.x <= 0 || size.y <= 0)
                        {
				ImGui::End();
				return;
			}

                       ed::Begin("##editor");
                       //...
                       ed::End();
                       ImGui::End();

There is one more bug when I am using the docking branch... It will show a weird scrollbar when I drag the window to another screen.

And I am suppressing it with an "ImGuiWindowFlags_NoScrollbar" child window...

Sorry for my poor English.

I think this is same issue that #186 is trying to address. You can try to pick changes from there before fix for the issue land on the main branch.

Does that change solve problem for you?