Function ExampleTree_CreateDemoTree

src/imgui/imgui_demo.cpp:785–812

Create example tree data (this allocates _many_ more times than most other code in either Dear ImGui or others demo)

// Create example tree data
// (this allocates _many_ more times than most other code in either Dear ImGui or others demo)
static ExampleTreeNode* ExampleTree_CreateDemoTree()
{
    static const char* root_names[] = { "Apple", "Banana", "Cherry", "Kiwi", "Mango", "Orange", "Pear", "Pineapple", "Strawberry", "Watermelon" };
    const size_t NAME_MAX_LEN = sizeof(ExampleTreeNode::Name);
    char name_buf[NAME_MAX_LEN];
    int uid = 0;
    ExampleTreeNode* node_L0 = ExampleTree_CreateNode("<ROOT>", ++uid, NULL);
    const int root_items_multiplier = 2;
    for (int idx_L0 = 0; idx_L0 < IM_ARRAYSIZE(root_names) * root_items_multiplier; idx_L0++)
    {
        snprintf(name_buf, IM_ARRAYSIZE(name_buf), "%s %d", root_names[idx_L0 / root_items_multiplier], idx_L0 % root_items_multiplier);
        ExampleTreeNode* node_L1 = ExampleTree_CreateNode(name_buf, ++uid, node_L0);
        const int number_of_childs = (int)strlen(node_L1->Name);
        for (int idx_L1 = 0; idx_L1 < number_of_childs; idx_L1++)
        {
            snprintf(name_buf, IM_ARRAYSIZE(name_buf), "Child %d", idx_L1);
            ExampleTreeNode* node_L2 = ExampleTree_CreateNode(name_buf, ++uid, node_L1);
            node_L2->HasData = true;
            if (idx_L1 == 0)
            {
                snprintf(name_buf, IM_ARRAYSIZE(name_buf), "Sub-child %d", 0);
                ExampleTreeNode* node_L3 = ExampleTree_CreateNode(name_buf, ++uid, node_L2);
                node_L3->HasData = true;
            }
        }
    }
    return node_L0;
}

//-----------------------------------------------------------------------------
// [SECTION] DemoWindowWidgetsBasic()