ListView.h

#pragma once
 
#include "ImageList.h"
#include "ItemsControl.h"
#include "List.h"
#include "ObservableCollection.h"
#include <commctrl.h>
 
namespace sw
{
    enum class ListViewImageList {
        Normal      = LVSIL_NORMAL,      
        Small       = LVSIL_SMALL,       
        State       = LVSIL_STATE,       
        GroupHeader = LVSIL_GROUPHEADER, 
    };
 
    enum class ListViewColumnAlignment {
        Left   = LVCFMT_LEFT,   
        Right  = LVCFMT_RIGHT,  
        Center = LVCFMT_CENTER, 
    };
 
    struct ListViewColumn {
        std::wstring header;
 
        double width;
 
        int imageIndex;
 
        ListViewColumnAlignment alignment;
 
        ListViewColumn(const wchar_t *header, double width = 100,
                       ListViewColumnAlignment alignment = ListViewColumnAlignment::Left);
 
        ListViewColumn(const std::wstring &header, double width = 100,
                       ListViewColumnAlignment alignment = ListViewColumnAlignment::Left);
    };
 
    struct ListViewItem {
        List<std::wstring> subItems;
 
        int imageIndex = -1;
 
        bool checked = false;
 
        ListViewItem() = default;
 
        ListViewItem(const ListViewItem &other) = default;
 
        ListViewItem(ListViewItem &&other) noexcept;
 
        ListViewItem(std::initializer_list<std::wstring> subItems);
    };
 
    class ListView : public ItemsControl
    {
    private:
        using TBase = ItemsControl;
 
        ObservableCollection<ListViewItem> _items;
 
        ObservableCollection<ListViewColumn> _columns;
 
        ListViewItem _itemDisplayBuffer;
 
    public:
        const ReadOnlyProperty<ObservableCollection<ListViewItem> *> Items;
 
        const ReadOnlyProperty<ObservableCollection<ListViewColumn> *> Columns;
 
        const Property<bool> GridLines;
 
        const Property<bool> MultiSelect;
 
        const ReadOnlyProperty<int> SelectedCount;
 
        const Property<bool> CheckBoxes;
 
        const ReadOnlyProperty<int> TopIndex;
 
        const Property<bool> ShareImageLists;
 
        const Property<bool> Editable;
 
    public:
        ListView();
 
        void Refresh(bool refreshColumns = true);
 
        List<int> GetSelectedIndices();
 
        bool GetItemCheckState(int index);
 
        void SetItemCheckState(int index, bool value);
 
        int GetItemIndexFromPoint(const Point &point);
 
        ImageList GetImageList(ListViewImageList imageList);
 
        HIMAGELIST SetImageList(ListViewImageList imageList, HIMAGELIST value);
 
        bool EditItem(int index);
 
        void CancelEdit();
 
        bool EnsureVisible(int index, bool partialOK = false);
 
    protected:
        virtual IList *GetDefaultItemsSource() override final;
 
        virtual void OnCurrentItemsSourceChanged(IList *oldItemsSource, IList *newItemsSource) override;
 
        virtual void OnCurrentItemsSourceCollectionChanged(const NotifyCollectionChangedEventArgs &args) override;
 
        virtual int GetSelectedIndex() override;
 
        virtual void SetSelectedIndex(int index) override;
 
        virtual void OnSetBackColor(Color color, bool redraw) override;
 
        virtual void OnSetTextColor(Color color, bool redraw) override;
 
        virtual bool OnNotify(NMHDR *pNMHDR, LRESULT &result) override;
 
        virtual bool OnNotified(NMHDR *pNMHDR, LRESULT &result) override;
 
        virtual bool OnPrePaint(NMCUSTOMDRAW *pNMCD, LRESULT &result) override;
 
        virtual bool OnItemPrePaint(NMCUSTOMDRAW *pNMCD, bool subItem, LRESULT &result) override;
 
        virtual void OnItemChanged(NMLISTVIEW *pNMLV);
 
        virtual void OnCheckStateChanged(int index);
 
        virtual void OnHeaderItemChanging(NMHEADERW *pNMH);
 
        virtual void OnHeaderItemChanged(NMHEADERW *pNMH);
 
        virtual void OnHeaderItemClicked(NMHEADERW *pNMH);
 
        virtual void OnHeaderItemDoubleClicked(NMHEADERW *pNMH);
 
        virtual void OnItemClicked(NMITEMACTIVATE *pNMIA);
 
        virtual void OnItemDoubleClicked(NMITEMACTIVATE *pNMIA);
 
        virtual void OnCheckBoxClicked(int index);
 
        virtual void OnEndEdit(ListViewEndEditEventArgs &args);
 
        virtual void OnApplyEdit(int index, const std::wstring &newText);
 
        virtual void OnGetDispInfo(NMLVDISPINFOW *pNMInfo);
 
        virtual void GetDisplayInfo(int index, const Variant &item, NMLVDISPINFOW *pNMInfo);
 
        virtual bool GetDisplayInfo(int index, const Variant &item, ListViewItem &listViewItem);
 
        virtual void GetCheckBoxRect(int index, RECT &rect);
 
        virtual void OnGetItemCheckState(int index, bool &checked);
 
        virtual void OnSetItemCheckState(int index, bool checked);
 
    private:
        void _SetCount(int count);
 
        void _UpdateCount();
 
        int _GetRowCount();
 
        int _GetColCount();
 
        DWORD _GetExtendedListViewStyle();
 
        DWORD _SetExtendedListViewStyle(DWORD style);
 
        void _ApplyDispInfo(const ListViewItem &item, NMLVDISPINFOW *pNMInfo);
 
        void _ApplyColumnInfo(const ListViewColumn &column, LVCOLUMNW *pLvc);
 
        bool _InsertColumn(int index, const ListViewColumn &column);
 
        bool _DeleteColumn(int index);
 
        bool _SetColumn(int index, const ListViewColumn &column);
 
        void _UpdateColumns();
 
        void _ColumnsCollectionChangedHandler(
            INotifyCollectionChanged &sender, NotifyCollectionChangedEventArgs &args);
    };
};