Method processMessage

source/Gui/OverlayController.cpp:148–197

}

void OverlayController::processMessage()
{
    auto now = std::chrono::steady_clock::now();
    auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(now - *_messageStartTimepoint);
    if (duration.count() > ShowDuration + FadeoutTextDuration) {
        _messageStartTimepoint.reset();
    }
    if (_counter == 2) {
        _ticksLaterTimepoint = std::chrono::steady_clock::now();
    }

    float textAlpha = 1.0f;
    if (duration.count() > ShowDuration) {
        textAlpha = std::max(0.0f, 1.0f - static_cast<float>(duration.count() - ShowDuration) / FadeoutTextDuration);
    }
    ImDrawList* drawList = ImGui::GetForegroundDrawList();

    auto& styleRep = StyleRepository::get();
    auto center = ImGui::GetMainViewport()->Size;
    center.x /= 2;
    auto textColorFront = ImColor::HSV(0.5f, 0.0f, 1.0f, textAlpha);
    auto textColorBack = ImColor::HSV(0.5f, 0.0f, 0.0f, textAlpha);

    ImGui::PushFont(styleRep.getMonospaceLargeFont());
    auto fontScaling = MessageFontSize / styleRep.getMonospaceLargeFont()->FontSize;
    auto fontSize = ImGui::CalcTextSize(_message.c_str());
    fontSize.x *= fontScaling;
    fontSize.y *= fontScaling;
    ImGui::PopFont();

    if (_withLightning && ++_counter > 2) {
        auto durationAfterSomeTicks = std::chrono::duration_cast<std::chrono::milliseconds>(now - *_ticksLaterTimepoint);
        float lightningAlpha = std::max(0.0f, 0.7f - static_cast<float>(durationAfterSomeTicks.count()) / FadeoutLightningDuration);
        auto viewSize = toRealVector2D(Viewport::get().getViewSize());
        drawList->AddRectFilled({0, 0}, {viewSize.x, viewSize.y}, ImColor::HSV(0.0f, 0.0f, 1.0f, lightningAlpha));
    }
    drawList->AddText(
        styleRep.getMonospaceLargeFont(),
        styleRep.scale(MessageFontSize),
        {center.x - fontSize.x / 2 - 2, center.y - styleRep.scale(100.0f) - fontSize.y - 2},
        textColorBack,
        _message.c_str());

    drawList->AddText(
        styleRep.getMonospaceLargeFont(),
        styleRep.scale(MessageFontSize),
        {center.x - fontSize.x / 2, center.y - styleRep.scale(100.0f) - fontSize.y},
        textColorFront,
        _message.c_str());
}