Horizontal scrollbar clipping problems

[Flix01]

Hi.

I've rarely used horizontal scroll bars so far.
However I've tried using a horizontal scroll bar together with a "column layout", and I've discovered that last column text gets clipped like in the image:

I'm not sure if it's my fault or not. Do you have some advice about it ?

[ocornut]

I'll look into it. Columns are still full of issues. Consider setting an explicit content width.

[Flix01]

OK, but it might be something in my code: it's an old piece of code where I explicitly used ImGui::SetColumnOffset(...) (every frame or so)... maybe that did not take ImGui::GetScrollX() into consideration (horizontal scroll bars did not exist when I wrote that code...).

[Eoghanenigma]

I've just run into this issue myself.
I have a few columns, the left hand columns are small and so i used SetColumnOffset to restrict their width.
The final column contains a longer string so I'd like it to be flexibly sized.

Just as the gif shows above, the columns will track with the scroll bar correctly, but the clipping on the final column shrinks until the last column is completely cutoff.

[sonoro1234]

Happens for example in Example app Log: Last line is partially covered by horizontal scrollbar

[ocornut]

@sonoro1234 The bug you are referring to is unrelated to this thread, I think it is #665 which I have just fixed.

[ocornut]

This should be fixed now. @Flix01
Not that Columns will FIT within the given space they have and therefore if you want an horizontally scrollable columns set you likely need to set a content width explicitly. See SetNextWindowContentWidth.

if (ImGui::TreeNode("Horizontal Scrolling"))
{
    ImGui::SetNextWindowContentWidth(1500);
    ImGui::BeginChild("##scrollingregion", ImVec2(0, 120), false, ImGuiWindowFlags_HorizontalScrollbar);
    ImGui::Columns(10);
    for (int i = 0; i < 20; i++)
        for (int j = 0; j < 10; j++)
        {
            ImGui::Text("Line %d Column %d...", i, j);
            ImGui::NextColumn();
        }
    ImGui::Columns(1);
    ImGui::EndChild();
    ImGui::TreePop();
}

Let me know if it all works for you. Additionally I just applied a bunch of Columns related changes, so interested in hearing feedback if anything broken/improved.

[Flix01]

Let me know if it all works for you. Additionally I just applied a bunch of Columns related changes, so interested in hearing feedback if anything broken/improved.

Seems to work, and I'm not seeing anything broken so far... 👍