ImGuiWindowFlags_AlwaysAutoResize + Columns

[john-chapman]

In version 1.52 the behavior of ImGuiWindowFlags_AlwaysAutoResize has changed when using columns to arrange widgets - it looks like the auto resize doesn't account for the columns. This was working in version 1.50:

ImGui::Begin("foo", 0, ImGuiWindowFlags_AlwaysAutoResize);
   ImGui::Columns(4);
       // blah blah
   ImGui::Columns(1);
ImGui::End();

But in 1.52 looks like this:

[ocornut]

Columns use the available space (which you may force adjust with eg: SetCursorPosX or SetNextWindowContentsSize), they don't yet feed back their contents back into the window contents size. Previously there was a bug which made only the last column declare its space outside the columns set, which would tends to make your use case non-zero width but still rather incorrect. At the moment unfortunately the only solutions are either to grow the width yourself or ditch the AutoResize flag.

[ihamer]

Can you elaborate on "grow the width yourself"? I would like to try to implement this.

[ocornut]

Just call SetCursorPosX() to do that.

[L-P]

Had the same problem, fixed it by specifying a constant width:

ImGui::SetNextWindowSizeConstraints({230, -1}, {230, -1});
ImGui::Begin("SomeWindowWithTextColumns", nullptr, ImGuiWindowFlags_AlwaysAutoResize);

This will set the height automatically and keep the width fixed. Not ideal but it works.

SetNextWindowContentSize did not work with a height of 0.f as it should per stated in the documentation, only SetNextWindowSizeConstraints with a height of -1 correctly adjusts the window height.

As the text shown has a constant width, this worked for me.

[ocornut]

SetNextWindowContentSize did not work with a height of 0.f as it should per stated in the documentation,

This is a bug introduced in eab6333, pushed a fix now. Thanks.

Test:

ImGui::SetNextWindowContentSize(ImVec2(400, 0.0f));
ImGui::Begin("Test #1363", NULL, ImGuiWindowFlags_AlwaysAutoResize);
ImGui::Columns(4);
ImGui::Text("column 0");
ImGui::Text("blah blah");
ImGui::Columns(1);
ImGui::End();

[ocornut]

Closing this as Columns are a Legacy feature.
Tables are reporting their contents so auto-sizing of a Parent Window carrying a Table should work.