How can I click a button in a table column easily

Open

I can see that I have to access a child if the table has a scrollbar, and no child if there is no scrollbar. Is there maybe a helper to hide this fact that I've just not yet seen?

if (ImGui::BeginTable("##someid", 2, ImGuiTableFlags_Resizable | ImGuiTableFlags_NoSavedSettings | ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg | ImGuiTableFlags_ScrollY)) {
 ImGui::TableSetupColumn("Col1");
 ImGui::TableSetupColumn("Col2");
 ImGui::TableHeadersRow();
 { // here the for loop
  ImGui::TableNextRow();
  ImGui::TableNextColumn();
  ImGuiTreeNodeFlags treeFlags = ImGuiTreeNodeFlags_SpanFullWidth | ImGuiTreeNodeFlags_SpanAllColumns | ImGuiTreeNodeFlags_SpanAvailWidth;
  if (ImGui::TreeNodeEx("treenode", treeFlags)) {
   if (ImGui::Button("Button1")) {
    // do something
   }
   ImGui::TreePop();
  }
 }
 ImGui::EndTable();
}

I could use ctx->WindowInfo() - but as far as I can see this would only work if the table has the scrolling activated.

Activity

ocornut2y ago

I can see that I have to access a child if the table has a scrollbar, and no child if there is no scrollbar. Is there maybe a helper to hide this fact that I've just not yet seen? I'll try work on something.

I don't have a great solution to I would like to improve child name/id logic to facilitate this, toward a way where "parent/table" could be the same ID regardless of whether the table has a child window or not. That, or TestEngine would do iterative lookups on each item of a path.

Note that you can use the "**/Button1" syntax to find an item in child windows, which can be used as a workaround to infer the parent window.

ocornut1y ago

FYI this is working and has always worked:

t = IM_REGISTER_TEST(e, "testengine", "testengine_ref_tables");
t->GuiFunc = [](ImGuiTestContext* ctx)
{
    ImGui::Begin("Test Window", NULL, ImGuiWindowFlags_AlwaysAutoResize);
    if (ImGui::BeginTable("Table1", 2, ImGuiTableFlags_NoSavedSettings | ImGuiTableFlags_Borders))
    {
        ImGui::TableNextColumn();
        ImGui::Button("Button1");
        ImGui::EndTable();
    }
    if (ImGui::BeginTable("Table2", 2, ImGuiTableFlags_NoSavedSettings | ImGuiTableFlags_Borders | ImGuiTableFlags_ScrollX | ImGuiTableFlags_ScrollY, ImVec2(0.0f, 100.0f)))
    {
        ImGui::TableNextColumn();
        ImGui::Button("Button2");
        ImGui::EndTable();
    }
    ImGui::End();
};
t->TestFunc = [](ImGuiTestContext* ctx)
{
    ctx->SetRef("Test Window");
    ctx->ItemClick("Table1/Button1");
    ctx->ItemClick("Table2/Button2");

    ctx->SetRef("Test Window/Table1");
    ctx->ItemClick("Button1");

    ctx->SetRef("Test Window/Table2");
    ctx->ItemClick("Button2");
};

The first table doesn't use a child window, the second one does. But as both push a same ID in the stack it works transparently.

So looking at this again I'm not sure I understand the problem. In fact, my answer misleadingly suggested there was a problem but I don't see it now.