| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: wx/htmllbox.h |
| 3 | // Purpose: wxHtmlListBox is a listbox whose items are wxHtmlCells |
| 4 | // Author: Vadim Zeitlin |
| 5 | // Modified by: |
| 6 | // Created: 31.05.03 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) 2003 Vadim Zeitlin <vadim@wxwidgets.org> |
| 9 | // Licence: wxWindows licence |
| 10 | /////////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | #ifndef _WX_HTMLLBOX_H_ |
| 13 | #define _WX_HTMLLBOX_H_ |
| 14 | |
| 15 | #include "wx/vlbox.h" // base class |
| 16 | |
| 17 | #if wxUSE_FILESYSTEM |
| 18 | #include "wx/filesys.h" |
| 19 | #endif // wxUSE_FILESYSTEM |
| 20 | |
| 21 | class WXDLLIMPEXP_HTML wxHtmlCell; |
| 22 | class WXDLLIMPEXP_HTML wxHtmlWinParser; |
| 23 | class WXDLLIMPEXP_HTML wxHtmlListBoxCache; |
| 24 | class WXDLLIMPEXP_HTML wxHtmlListBoxStyle; |
| 25 | |
| 26 | // ---------------------------------------------------------------------------- |
| 27 | // wxHtmlListBox |
| 28 | // ---------------------------------------------------------------------------- |
| 29 | |
| 30 | class WXDLLIMPEXP_HTML wxHtmlListBox : public wxVListBox |
| 31 | { |
| 32 | DECLARE_ABSTRACT_CLASS(wxHtmlListBox) |
| 33 | public: |
| 34 | // constructors and such |
| 35 | // --------------------- |
| 36 | |
| 37 | // default constructor, you must call Create() later |
| 38 | wxHtmlListBox() { Init(); } |
| 39 | |
| 40 | // normal constructor which calls Create() internally |
| 41 | wxHtmlListBox(wxWindow *parent, |
| 42 | wxWindowID id = wxID_ANY, |
| 43 | const wxPoint& pos = wxDefaultPosition, |
| 44 | const wxSize& size = wxDefaultSize, |
| 45 | long style = 0, |
| 46 | const wxString& name = wxVListBoxNameStr) |
| 47 | { |
| 48 | Init(); |
| 49 | |
| 50 | (void)Create(parent, id, pos, size, style, name); |
| 51 | } |
| 52 | |
| 53 | // really creates the control and sets the initial number of items in it |
| 54 | // (which may be changed later with SetItemCount()) |
| 55 | // |
| 56 | // the only special style which may be specified here is wxLB_MULTIPLE |
| 57 | // |
| 58 | // returns true on success or false if the control couldn't be created |
| 59 | bool Create(wxWindow *parent, |
| 60 | wxWindowID id = wxID_ANY, |
| 61 | const wxPoint& pos = wxDefaultPosition, |
| 62 | const wxSize& size = wxDefaultSize, |
| 63 | long style = 0, |
| 64 | const wxString& name = wxVListBoxNameStr); |
| 65 | |
| 66 | // destructor cleans up whatever resources we use |
| 67 | virtual ~wxHtmlListBox(); |
| 68 | |
| 69 | // override some base class virtuals |
| 70 | virtual void RefreshLine(size_t line); |
| 71 | virtual void RefreshLines(size_t from, size_t to); |
| 72 | virtual void RefreshAll(); |
| 73 | virtual void SetItemCount(size_t count); |
| 74 | |
| 75 | |
| 76 | #if wxUSE_FILESYSTEM |
| 77 | // retrieve the file system used by the wxHtmlWinParser: if you use |
| 78 | // relative paths in your HTML, you should use its ChangePathTo() method |
| 79 | wxFileSystem& GetFileSystem() { return m_filesystem; } |
| 80 | const wxFileSystem& GetFileSystem() const { return m_filesystem; } |
| 81 | #endif // wxUSE_FILESYSTEM |
| 82 | |
| 83 | protected: |
| 84 | // this method must be implemented in the derived class and should return |
| 85 | // the body (i.e. without <html>) of the HTML for the given item |
| 86 | virtual wxString OnGetItem(size_t n) const = 0; |
| 87 | |
| 88 | // this function may be overridden to decorate HTML returned by OnGetItem() |
| 89 | virtual wxString OnGetItemMarkup(size_t n) const; |
| 90 | |
| 91 | |
| 92 | // this method allows to customize the selection appearance: it may be used |
| 93 | // to specify the colour of the text which normally has the given colour |
| 94 | // colFg when it is inside the selection |
| 95 | // |
| 96 | // by default, the original colour is not used at all and all text has the |
| 97 | // same (default for this system) colour inside selection |
| 98 | virtual wxColour GetSelectedTextColour(const wxColour& colFg) const; |
| 99 | |
| 100 | // this is the same as GetSelectedTextColour() but allows to customize the |
| 101 | // background colour -- this is even more rarely used as you can change it |
| 102 | // globally using SetSelectionBackground() |
| 103 | virtual wxColour GetSelectedTextBgColour(const wxColour& colBg) const; |
| 104 | |
| 105 | |
| 106 | // we implement both of these functions in terms of OnGetItem(), they are |
| 107 | // not supposed to be overridden by our descendants |
| 108 | virtual void OnDrawItem(wxDC& dc, const wxRect& rect, size_t n) const; |
| 109 | virtual wxCoord OnMeasureItem(size_t n) const; |
| 110 | |
| 111 | |
| 112 | // event handlers |
| 113 | void OnSize(wxSizeEvent& event); |
| 114 | |
| 115 | |
| 116 | // common part of all ctors |
| 117 | void Init(); |
| 118 | |
| 119 | // ensure that the given item is cached |
| 120 | void CacheItem(size_t n) const; |
| 121 | |
| 122 | private: |
| 123 | // this class caches the pre-parsed HTML to speed up display |
| 124 | wxHtmlListBoxCache *m_cache; |
| 125 | |
| 126 | // HTML parser we use |
| 127 | wxHtmlWinParser *m_htmlParser; |
| 128 | |
| 129 | #if wxUSE_FILESYSTEM |
| 130 | // file system used by m_htmlParser |
| 131 | wxFileSystem m_filesystem; |
| 132 | #endif // wxUSE_FILESYSTEM |
| 133 | |
| 134 | // rendering style for the parser which allows us to customize our colours |
| 135 | wxHtmlListBoxStyle *m_htmlRendStyle; |
| 136 | |
| 137 | |
| 138 | // it calls our GetSelectedTextColour() and GetSelectedTextBgColour() |
| 139 | friend class wxHtmlListBoxStyle; |
| 140 | |
| 141 | |
| 142 | DECLARE_EVENT_TABLE() |
| 143 | DECLARE_NO_COPY_CLASS(wxHtmlListBox) |
| 144 | }; |
| 145 | |
| 146 | #endif // _WX_HTMLLBOX_H_ |
| 147 | |