Function ShowExampleAppPropertyEditor

lib/imgui/imgui_demo.cpp:4169–4234

Demonstrate create a simple property editor.

// Demonstrate create a simple property editor.
static void ShowExampleAppPropertyEditor(bool* p_open)
{
    ImGui::SetNextWindowSize(ImVec2(430,450), ImGuiCond_FirstUseEver);
    if (!ImGui::Begin("Example: Property editor", p_open))
    {
        ImGui::End();
        return;
    }

    HelpMarker("This example shows how you may implement a property editor using two columns.\nAll objects/fields data are dummies here.\nRemember that in many simple cases, you can use ImGui::SameLine(xxx) to position\nyour cursor horizontally instead of using the Columns() API.");

    ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(2,2));
    ImGui::Columns(2);
    ImGui::Separator();

    struct funcs
    {
        static void ShowDummyObject(const char* prefix, int uid)
        {
            ImGui::PushID(uid);                      // Use object uid as identifier. Most commonly you could also use the object pointer as a base ID.
            ImGui::AlignTextToFramePadding();  // Text and Tree nodes are less high than regular widgets, here we add vertical spacing to make the tree lines equal high.
            bool node_open = ImGui::TreeNode("Object", "%s_%u", prefix, uid);
            ImGui::NextColumn();
            ImGui::AlignTextToFramePadding();
            ImGui::Text("my sailor is rich");
            ImGui::NextColumn();
            if (node_open)
            {
                static float dummy_members[8] = { 0.0f,0.0f,1.0f,3.1416f,100.0f,999.0f };
                for (int i = 0; i < 8; i++)
                {
                    ImGui::PushID(i); // Use field index as identifier.
                    if (i < 2)
                    {
                        ShowDummyObject("Child", 424242);
                    }
                    else
                    {
                        // Here we use a TreeNode to highlight on hover (we could use e.g. Selectable as well)
                        ImGui::AlignTextToFramePadding();
                        ImGui::TreeNodeEx("Field", ImGuiTreeNodeFlags_Leaf | ImGuiTreeNodeFlags_NoTreePushOnOpen | ImGuiTreeNodeFlags_Bullet, "Field_%d", i);
                        ImGui::NextColumn();
                        ImGui::SetNextItemWidth(-1);
                        if (i >= 5)
                            ImGui::InputFloat("##value", &dummy_members[i], 1.0f);
                        else
                            ImGui::DragFloat("##value", &dummy_members[i], 0.01f);
                        ImGui::NextColumn();
                    }
                    ImGui::PopID();
                }
                ImGui::TreePop();
            }
            ImGui::PopID();
        }
    };

    // Iterate dummy objects with dummy members (all the same data)