Function callbackFunc

tutorial/302_PolyVectors/main.cpp:78–132

void callbackFunc() {
    ImGui::PushItemWidth(300);
    
    bool recomputeField = false;
    recomputeField = recomputeField || ImGui::InputDouble("RoSy Weight", &roSyWeight);
    recomputeField = recomputeField || ImGui::InputDouble("Alignment Weight", &alignWeight);
    
    if (recomputeField) {
        recompute_field();
        update_visualization();
    }
    
    const char* items[] = { "Only Constraints", "Hard prescription", "Soft prescription"};
    static const char* current_item = NULL;
    
    float combo_width = 0.0f;
    if (combo_width == 0.0f) {
        ImGuiStyle& style = ImGui::GetStyle();
        for (auto& item : items)
            combo_width = std::max(combo_width, ImGui::CalcTextSize(item).x);
        combo_width += style.FramePadding.x * 5.0 + ImGui::GetFontSize() + style.ItemInnerSpacing.x;
    }
    
    ImGui::PushItemWidth(combo_width);
    if (ImGui::BeginCombo("Viewing mode", current_item)) // The second parameter is the label previewed before opening the combo.
    {
        for (int n = 0; n < IM_ARRAYSIZE(items); n++)
        {
            bool is_selected = (current_item == items[n]); // You can store your selection however you want, outside or inside your objects
            if (ImGui::Selectable(items[n], is_selected)){
                current_item = items[n];
                switch (n){
                    case 0:
                        viewingMode = CONSTRAINTS;
                        break;
                    case 1:
                        viewingMode = HARD_PRESCRIPTION;
                        break;
                    case 2:
                        viewingMode = SOFT_PRESCRIPTION;
                        break;
                }
                update_visualization();
            }
            if (is_selected)
                ImGui::SetItemDefaultFocus();   // You may set the initial focus when opening the combo (scrolling + for keyboard navigation support)
        }
        ImGui::EndCombo();
    }
    
    if (ImGui::Button("Save Raw Field"))
        directional::write_raw_field(TUTORIAL_OUTPUT_PATH "/polyvector.rawfield", (viewingMode==HARD_PRESCRIPTION ? rawFieldHard : rawFieldSoft));
    
    ImGui::PopItemWidth();
}


int main()