diff options
Diffstat (limited to 'fusion_model.hpp')
| -rw-r--r-- | fusion_model.hpp | 43 |
1 files changed, 36 insertions, 7 deletions
diff --git a/fusion_model.hpp b/fusion_model.hpp index 282be11..3d84c87 100644 --- a/fusion_model.hpp +++ b/fusion_model.hpp @@ -9,11 +9,19 @@ #include <vector> #include <map> +#include <memory> + +struct FusionModelObserver +{ + virtual void cell_changed(int row, int column) {} + + virtual void append_row_begin() {} + virtual void append_row_end() {} +}; template <typename T> -struct fusion_model { -private: - fusion_model(T); +struct FusionModel { + FusionModel(T) = delete; }; template <bool> @@ -56,10 +64,30 @@ struct FusionModelInterface : public FusionModelWithHeaderH<has_header_h>, publi virtual size_t column_count() const = 0; virtual boost::any get_cell(size_t row, size_t column) const = 0; virtual void set_cell(size_t row, size_t column, boost::any const& value) = 0; + + std::vector<std::weak_ptr<FusionModelObserver>> observers; + void add_observer(std::weak_ptr<FusionModelObserver> obs) + { + observers.push_back(obs); + } + + template <typename U, typename... Args> + void call_on_observers(U f, Args... arguments) + { + for(auto it = observers.begin(); it != observers.end(); ++it) + { + auto s = it->lock(); + if(s) { + ((*s).*f)(arguments...); + } else { + it = observers.erase(it); + } + } + } }; template <typename T> -struct fusion_model<std::vector<T>> : public FusionModelInterface<true, false> +struct FusionModel<std::vector<T>> : public FusionModelInterface<true, false> { static_assert(friendly_fusion::traits::is_sequence<T>::type::value, "T is not a boost fusion sequence"); @@ -68,7 +96,7 @@ struct fusion_model<std::vector<T>> : public FusionModelInterface<true, false> std::vector<T> data; - fusion_model() = default; + FusionModel() = default; virtual size_t row_count() const override final { @@ -93,11 +121,12 @@ struct fusion_model<std::vector<T>> : public FusionModelInterface<true, false> virtual void set_cell(size_t row, size_t column, boost::any const& value) override final { set_nth<row_type>(data[row], column, value); + call_on_observers(&FusionModelObserver::cell_changed, row, column); } }; template <typename T> -struct fusion_model<std::map<std::string, T>> : public FusionModelInterface<true, true> +struct FusionModel<std::map<std::string, T>> : public FusionModelInterface<true, true> { static_assert(boost::fusion::traits::is_sequence<T>::type::value, "T is not a boost fusion sequence"); @@ -106,7 +135,7 @@ struct fusion_model<std::map<std::string, T>> : public FusionModelInterface<true std::map<std::string, T> data; - fusion_model() = default; + FusionModel() = default; virtual size_t row_count() const override final { |