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18785ba5c3
GAbstractView should be able to manage the high-level editing logic, as long as subclasses implement content_rect(GModelIndex) so we know where to put the editing widgets. :^)
103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
#pragma once
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#include <AK/AKString.h>
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#include <AK/Badge.h>
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#include <AK/Function.h>
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#include <AK/HashTable.h>
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#include <AK/Retainable.h>
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#include <LibGUI/GModelIndex.h>
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#include <LibGUI/GVariant.h>
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#include <SharedGraphics/TextAlignment.h>
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class Font;
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class GAbstractView;
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enum class GSortOrder { None, Ascending, Descending };
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class GModelNotification {
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public:
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enum Type {
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Invalid = 0,
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ModelUpdated,
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};
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explicit GModelNotification(Type type, const GModelIndex& index = GModelIndex())
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: m_type(type)
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, m_index(index)
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{
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}
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Type type() const { return m_type; }
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GModelIndex index() const { return m_index; }
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private:
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Type m_type { Invalid };
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GModelIndex m_index;
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};
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class GModel : public Retainable<GModel> {
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public:
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struct ColumnMetadata {
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int preferred_width { 0 };
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TextAlignment text_alignment { TextAlignment::CenterLeft };
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const Font* font { nullptr };
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};
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enum class Role { Display, Sort, Custom, ForegroundColor, BackgroundColor, Icon };
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virtual ~GModel();
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virtual int row_count(const GModelIndex& = GModelIndex()) const = 0;
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virtual int column_count(const GModelIndex& = GModelIndex()) const = 0;
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virtual String row_name(int) const { return { }; }
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virtual String column_name(int) const { return { }; }
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virtual ColumnMetadata column_metadata(int) const { return { }; }
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virtual GVariant data(const GModelIndex&, Role = Role::Display) const = 0;
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virtual void update() = 0;
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virtual GModelIndex parent_index(const GModelIndex&) const { return { }; }
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virtual GModelIndex index(int row, int column = 0, const GModelIndex& = GModelIndex()) const { return create_index(row, column); }
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virtual void activate(const GModelIndex&) { }
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virtual GModelIndex sibling(int row, int column, const GModelIndex& parent) const;
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virtual bool is_editable(const GModelIndex&) const { return false; }
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virtual void set_data(const GModelIndex&, const GVariant&) { }
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bool is_valid(const GModelIndex& index) const
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{
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return index.row() >= 0 && index.row() < row_count() && index.column() >= 0 && index.column() < column_count();
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}
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void set_selected_index(const GModelIndex&);
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GModelIndex selected_index() const { return m_selected_index; }
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bool activates_on_selection() const { return m_activates_on_selection; }
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void set_activates_on_selection(bool b) { m_activates_on_selection = b; }
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virtual int key_column() const { return -1; }
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virtual GSortOrder sort_order() const { return GSortOrder::None; }
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virtual void set_key_column_and_sort_order(int, GSortOrder) { }
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void register_view(Badge<GAbstractView>, GAbstractView&);
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void unregister_view(Badge<GAbstractView>, GAbstractView&);
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Function<void(GModel&)> on_model_update;
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Function<void(const GModelIndex&)> on_selection_changed;
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protected:
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GModel();
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void for_each_view(Function<void(GAbstractView&)>);
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void did_update();
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GModelIndex create_index(int row, int column, void* data = nullptr) const;
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private:
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HashTable<GAbstractView*> m_views;
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GModelIndex m_selected_index;
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bool m_activates_on_selection { false };
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};
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inline GModelIndex GModelIndex::parent() const
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{
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return m_model ? m_model->parent_index(*this) : GModelIndex();
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}
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