#pragma once #include <AK/String.h> #include <AK/Badge.h> #include <AK/Function.h> #include <AK/HashTable.h> #include <AK/RefCounted.h> #include <LibGUI/GModelIndex.h> #include <LibGUI/GVariant.h> #include <LibDraw/TextAlignment.h> class Font; class GAbstractView; enum class GSortOrder { None, Ascending, Descending }; class GModel : public RefCounted<GModel> { public: struct ColumnMetadata { int preferred_width { 0 }; TextAlignment text_alignment { TextAlignment::CenterLeft }; const Font* font { nullptr }; enum class Sortable { False, True }; Sortable sortable { Sortable::True }; }; enum class Role { Display, Sort, Custom, ForegroundColor, BackgroundColor, Icon }; virtual ~GModel(); virtual int row_count(const GModelIndex& = GModelIndex()) const = 0; virtual int column_count(const GModelIndex& = GModelIndex()) const = 0; virtual String row_name(int) const { return {}; } virtual String column_name(int) const { return {}; } virtual ColumnMetadata column_metadata(int) const { return {}; } virtual GVariant data(const GModelIndex&, Role = Role::Display) const = 0; virtual void update() = 0; virtual GModelIndex parent_index(const GModelIndex&) const { return {}; } virtual GModelIndex index(int row, int column = 0, const GModelIndex& = GModelIndex()) const { return create_index(row, column); } virtual GModelIndex sibling(int row, int column, const GModelIndex& parent) const; virtual bool is_editable(const GModelIndex&) const { return false; } virtual void set_data(const GModelIndex&, const GVariant&) {} bool is_valid(const GModelIndex& index) const { return index.row() >= 0 && index.row() < row_count() && index.column() >= 0 && index.column() < column_count(); } virtual int key_column() const { return -1; } virtual GSortOrder sort_order() const { return GSortOrder::None; } virtual void set_key_column_and_sort_order(int, GSortOrder) {} void register_view(Badge<GAbstractView>, GAbstractView&); void unregister_view(Badge<GAbstractView>, GAbstractView&); Function<void()> on_update; Function<void(const GModelIndex&)> on_selection_changed; protected: GModel(); void for_each_view(Function<void(GAbstractView&)>); void did_update(); GModelIndex create_index(int row, int column, const void* data = nullptr) const; private: HashTable<GAbstractView*> m_views; }; inline GModelIndex GModelIndex::parent() const { return m_model ? m_model->parent_index(*this) : GModelIndex(); }