ImGuiSelectableFlags_SpanAllColumns do not span whole table if ImGuiTableFlags_ScrollFreezeLeftColumn set and scrolled horizontally to the right

[jpbrault]

Version/Branch of Dear ImGui:

Version: 1.78 WIP
Branch: table

Back-end/Renderer/Compiler/OS

Back-ends: imgui_impl_sdl.cpp + imgui_impl_opengl2.cpp
Compiler: GCC 9.1 / Clang 10
Operating System: Mac/Linux

My Issue/Question:

When using a Selectable() in a table row with the ImGuiSelectableFlags_SpanAllColumns flag in a table with ImGuiTableFlags_ScrollFreezeTopRow | ImGuiTableFlags_Scroll | ImGuiTableFlags_ScrollFreezeLeftColumn flags, I would expect the selection to extent past the last column so the whole row would be selected/highlighted. I would also expect that column highlight to header to align with the cell.

Screenshots/Video

  if ( ImGui::Begin( "Window" ) )
  {
    if ( ImGui::BeginTable(
         "Table", 2,
            ImGuiTableFlags_ScrollFreezeTopRow |
           ImGuiTableFlags_Scroll |
           ImGuiTableFlags_ScrollFreezeLeftColumn ) )
    {
      ImGui::TableSetupColumn(
        "Col 1", ImGuiTableColumnFlags_WidthFixed | ImGuiTableColumnFlags_NoHide,
        200 );
      ImGui::TableSetupColumn(
        "Col 2", ImGuiTableColumnFlags_WidthFixed,
        200 );
      ImGui::TableAutoHeaders();

      ImGui::TableNextRow();
      ImGui::TableSetColumnIndex( 0 );

      ImGui::Selectable( "Val 1", true,
                         ImGuiSelectableFlags_SpanAllColumns |
                          ImGuiSelectableFlags_AllowDoubleClick );
      if ( ImGui::TableNextCell() )
        ImGui::TextUnformatted( "Val 2");

      ImGui::EndTable();
    }
    ImGui::End();
  }

[ocornut]

Hello and thanks for the report.
I believe this is merely a variant of the issue described in #3187.
Going to look at that more seriously.

[ocornut]

This should now be fixed in master by 8074b49 and in tables with 8074b49.

Thanks for your help and report!