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C++: Make a model based on a SharedArray like in C++

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And make the SharedArray editable
This commit is contained in:
Olivier Goffart 2020-09-15 15:01:33 +02:00
parent 2ae4f1757b
commit 4da5f5eee6
3 changed files with 95 additions and 11 deletions
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30
api/sixtyfps-cpp/include/sixtyfps.h
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@ -200,7 +200,7 @@ public:
/// Sets the data for a particular row. This function should be called with `row < row_count()`.
/// If the model cannot support data changes, then it is ok to do nothing (default implementation).
/// If the model can update the data, the implmentation should also call row_changed.
virtual ModelData set_row_data(int) const {};
virtual void set_row_data(int, const ModelData &) {};
/// Internal function called by the view to register itself
void attach_peer(ModelPeer p) {
@ -238,15 +238,19 @@ private:
/// A Model backed by an array of constant size
template<int Count, typename ModelData>
struct ArrayModel : Model<ModelData>
class ArrayModel : public Model<ModelData>
{
std::array<ModelData, Count> data;
public:
template<typename... A>
ArrayModel(A &&... a) : data { std::forward<A>(a)... }
{
}
int row_count() const override { return Count; }
ModelData row_data(int i) const override { return data[i]; }
void set_row_data(int i, const ModelData &value) override {
data[i] = value;
}
};
/// Model to be used when we just want to repeat without data.
@ -258,6 +262,28 @@ struct IntModel : Model<int>
int row_data(int value) const override { return value; }
};
/// A Model backed by a SharedArray
template<typename ModelData>
class SharedArrayModel : public Model<ModelData>
{
SharedArray<ModelData> data;
public:
SharedArrayModel() = default;
SharedArrayModel(SharedArray<ModelData> array) : data(std::move(array)) {}
int row_count() const override { return data.size(); }
ModelData row_data(int i) const override { return data[i]; }
void set_row_data(int i, const ModelData &value) override {
data[i] = value;
this->row_changed(i);
}
// Append a new row with the given value
void push_back(const ModelData &value) {
data.push_back(value);
this->row_added(data.size() - 1, 1);
}
};
template<typename C, typename ModelData>
class Repeater
{