19class VBox :
public Node {
21 explicit VBox(
Elements children) : Node(std::move(children)) {}
23 void ComputeRequirement()
override {
24 requirement_.min_x = 0;
25 requirement_.min_y = 0;
26 requirement_.flex_grow_x = 0;
27 requirement_.flex_grow_y = 0;
28 requirement_.flex_shrink_x = 0;
29 requirement_.flex_shrink_y = 0;
31 for (
auto& child : children_) {
32 child->ComputeRequirement();
33 if (requirement_.selection < child->requirement().selection) {
34 requirement_.selection = child->requirement().selection;
35 requirement_.selected_box = child->requirement().selected_box;
36 requirement_.selected_box.y_min += requirement_.min_y;
37 requirement_.selected_box.y_max += requirement_.min_y;
39 requirement_.min_y += child->requirement().min_y;
41 std::max(requirement_.min_x, child->requirement().min_x);
45 void SetBox(Box box)
override {
48 std::vector<box_helper::Element> elements(children_.size());
49 for (
size_t i = 0; i < children_.size(); ++i) {
50 auto& element = elements[i];
51 const auto& requirement = children_[i]->requirement();
52 element.min_size = requirement.min_y;
53 element.flex_grow = requirement.flex_grow_y;
54 element.flex_shrink = requirement.flex_shrink_y;
56 const int target_size = box.y_max - box.y_min + 1;
60 for (
size_t i = 0; i < children_.size(); ++i) {
62 box.y_max = y + elements[i].size - 1;
63 children_[i]->SetBox(box);
84 return std::make_shared<VBox>(std::move(children));
virtual void SetBox(Box box)
Assign a position and a dimension to an element for drawing.
void Compute(std::vector< Element > *elements, int target_size)
std::shared_ptr< Node > Element
std::vector< Element > Elements
Element vbox(Elements)
A container displaying elements vertically one by one.