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ListView in C++

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This make sure the layout is correct, but does not implement the
optimization to only instentiate visible items
This commit is contained in:
Olivier Goffart 2020-10-05 11:31:54 +02:00
parent 5695e251b7
commit 58b176d10c
2 changed files with 97 additions and 15 deletions
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23
api/sixtyfps-cpp/include/sixtyfps.h
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@ -467,6 +467,18 @@ public:
}
}
template<typename Parent>
void ensure_updated_listview(const Parent *parent, const Property<float> *viewport_width,
const Property<float> *viewport_height, [[maybe_unused]] const Property<float> *viewport_y,
float listview_width, [[maybe_unused]] float listview_height) const
{
// TODO: the rust code in model.rs try to only allocate as many items as visible items
ensure_updated(parent);
float h = compute_layout_listview(viewport_width, listview_width);
viewport_height->set(h);
}
intptr_t visit(TraversalOrder order, private_api::ItemVisitorRefMut visitor) const
{
for (std::size_t i = 0; i < inner->data.size(); ++i) {
@ -494,6 +506,17 @@ public:
}
}
float compute_layout_listview(const Property<float> *viewport_width, float listview_width) const {
float offset = 0;
viewport_width->set(listview_width);
if (!inner)
return offset;
for (auto &x : inner->data) {
x.ptr->listview_layout(&offset, viewport_width);
}
return offset;
}
void model_set_row_data(int row, const ModelData &data) const {
if (model.is_dirty()) {
std::abort();