How to center align text horizontally?

Question

I am creating a text in ImGui. It automatically aligns right, how do I make just that one text align in the center?

ImGui::Text("Example Text");

I don't believe there is a function to do this. I know you can do it for a box or widget, but how would I for a simple text?

Answer 1

void TextCentered(std::string text) {
    auto windowWidth = ImGui::GetWindowSize().x;
    auto textWidth   = ImGui::CalcTextSize(text.c_str()).x;

    ImGui::SetCursorPosX((windowWidth - textWidth) * 0.5f);
    ImGui::Text(text.c_str());
}

Answer 2

Just want to add a solution for multi-line text to save 5 minutes for someone.

void TextCentered(std::string text) {
    float win_width = ImGui::GetWindowSize().x;
    float text_width = ImGui::CalcTextSize(text.c_str()).x;

    // calculate the indentation that centers the text on one line, relative
    // to window left, regardless of the `ImGuiStyleVar_WindowPadding` value
    float text_indentation = (win_width - text_width) * 0.5f;

    // if text is too long to be drawn on one line, `text_indentation` can
    // become too small or even negative, so we check a minimum indentation
    float min_indentation = 20.0f;
    if (text_indentation <= min_indentation) {
        text_indentation = min_indentation;
    }

    ImGui::SameLine(text_indentation);
    ImGui::PushTextWrapPos(win_width - text_indentation);
    ImGui::TextWrapped(text.c_str());
    ImGui::PopTextWrapPos();
}

Answer 3

This comment on a similar GitHub issue could help, haven't tried it myself though:

void TextCenter(std::string text) {
    float font_size = ImGui::GetFontSize() * text.size() / 2;
    ImGui::SameLine(
        ImGui::GetWindowSize().x / 2 -
        font_size + (font_size / 2)
    );

    ImGui::Text(text.c_str());
}