include/wx/htmllbox.h

   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 #include "wx/html/htmlwin.h"
  17 #include "wx/ctrlsub.h"
  18
  19 #if wxUSE_FILESYSTEM
  20     #include "wx/filesys.h"
  21 #endif // wxUSE_FILESYSTEM
  22
  23 class WXDLLIMPEXP_FWD_HTML wxHtmlCell;
  24 class WXDLLIMPEXP_FWD_HTML wxHtmlWinParser;
  25 class WXDLLIMPEXP_FWD_HTML wxHtmlListBoxCache;
  26 class WXDLLIMPEXP_FWD_HTML wxHtmlListBoxStyle;
  27
  28 extern WXDLLIMPEXP_DATA_HTML(const char) wxHtmlListBoxNameStr[];
  29 extern WXDLLIMPEXP_DATA_HTML(const char) wxSimpleHtmlListBoxNameStr[];
  30
  31 // ----------------------------------------------------------------------------
  32 // wxHtmlListBox
  33 // ----------------------------------------------------------------------------
  34
  35 class WXDLLIMPEXP_HTML wxHtmlListBox : public wxVListBox,
  36                                        public wxHtmlWindowInterface,
  37                                        public wxHtmlWindowMouseHelper
  38 {
  39     DECLARE_ABSTRACT_CLASS(wxHtmlListBox)
  40 public:
  41     // constructors and such
  42     // ---------------------
  43
  44     // default constructor, you must call Create() later
  45     wxHtmlListBox();
  46
  47     // normal constructor which calls Create() internally
  48     wxHtmlListBox(wxWindow *parent,
  49                   wxWindowID id = wxID_ANY,
  50                   const wxPoint& pos = wxDefaultPosition,
  51                   const wxSize& size = wxDefaultSize,
  52                   long style = 0,
  53                   const wxString& name = wxHtmlListBoxNameStr);
  54
  55     // really creates the control and sets the initial number of items in it
  56     // (which may be changed later with SetItemCount())
  57     //
  58     // the only special style which may be specified here is wxLB_MULTIPLE
  59     //
  60     // returns true on success or false if the control couldn't be created
  61     bool Create(wxWindow *parent,
  62                 wxWindowID id = wxID_ANY,
  63                 const wxPoint& pos = wxDefaultPosition,
  64                 const wxSize& size = wxDefaultSize,
  65                 long style = 0,
  66                 const wxString& name = wxHtmlListBoxNameStr);
  67
  68     // destructor cleans up whatever resources we use
  69     virtual ~wxHtmlListBox();
  70
  71     // override some base class virtuals
  72     virtual void RefreshRow(size_t line);
  73     virtual void RefreshRows(size_t from, size_t to);
  74     virtual void RefreshAll();
  75     virtual void SetItemCount(size_t count);
  76
  77 #if wxUSE_FILESYSTEM
  78     // retrieve the file system used by the wxHtmlWinParser: if you use
  79     // relative paths in your HTML, you should use its ChangePathTo() method
  80     wxFileSystem& GetFileSystem() { return m_filesystem; }
  81     const wxFileSystem& GetFileSystem() const { return m_filesystem; }
  82 #endif // wxUSE_FILESYSTEM
  83
  84     virtual void OnInternalIdle();
  85
  86 protected:
  87     // this method must be implemented in the derived class and should return
  88     // the body (i.e. without <html>) of the HTML for the given item
  89     virtual wxString OnGetItem(size_t n) const = 0;
  90
  91     // this function may be overridden to decorate HTML returned by OnGetItem()
  92     virtual wxString OnGetItemMarkup(size_t n) const;
  93
  94
  95     // this method allows to customize the selection appearance: it may be used
  96     // to specify the colour of the text which normally has the given colour
  97     // colFg when it is inside the selection
  98     //
  99     // by default, the original colour is not used at all and all text has the
 100     // same (default for this system) colour inside selection
 101     virtual wxColour GetSelectedTextColour(const wxColour& colFg) const;
 102
 103     // this is the same as GetSelectedTextColour() but allows to customize the
 104     // background colour -- this is even more rarely used as you can change it
 105     // globally using SetSelectionBackground()
 106     virtual wxColour GetSelectedTextBgColour(const wxColour& colBg) const;
 107
 108
 109     // we implement both of these functions in terms of OnGetItem(), they are
 110     // not supposed to be overridden by our descendants
 111     virtual void OnDrawItem(wxDC& dc, const wxRect& rect, size_t n) const;
 112     virtual wxCoord OnMeasureItem(size_t n) const;
 113
 114     // override this one to draw custom background for selected items correctly
 115     virtual void OnDrawBackground(wxDC& dc, const wxRect& rect, size_t n) const;
 116
 117     // this method may be overridden to handle clicking on a link in the
 118     // listbox (by default, clicks on links are simply ignored)
 119     virtual void OnLinkClicked(size_t n, const wxHtmlLinkInfo& link);
 120
 121     // event handlers
 122     void OnSize(wxSizeEvent& event);
 123     void OnMouseMove(wxMouseEvent& event);
 124     void OnLeftDown(wxMouseEvent& event);
 125
 126
 127     // common part of all ctors
 128     void Init();
 129
 130     // ensure that the given item is cached
 131     void CacheItem(size_t n) const;
 132
 133 private:
 134     // wxHtmlWindowInterface methods:
 135     virtual void SetHTMLWindowTitle(const wxString& title);
 136     virtual void OnHTMLLinkClicked(const wxHtmlLinkInfo& link);
 137     virtual wxHtmlOpeningStatus OnHTMLOpeningURL(wxHtmlURLType type,
 138                                                  const wxString& url,
 139                                                  wxString *redirect) const;
 140     virtual wxPoint HTMLCoordsToWindow(wxHtmlCell *cell,
 141                                        const wxPoint& pos) const;
 142     virtual wxWindow* GetHTMLWindow();
 143     virtual wxColour GetHTMLBackgroundColour() const;
 144     virtual void SetHTMLBackgroundColour(const wxColour& clr);
 145     virtual void SetHTMLBackgroundImage(const wxBitmap& bmpBg);
 146     virtual void SetHTMLStatusText(const wxString& text);
 147     virtual wxCursor GetHTMLCursor(HTMLCursor type) const;
 148
 149     // returns index of item that contains given HTML cell
 150     size_t GetItemForCell(const wxHtmlCell *cell) const;
 151
 152     // return physical coordinates of root wxHtmlCell of n-th item
 153     wxPoint GetRootCellCoords(size_t n) const;
 154
 155     // Converts physical coordinates stored in @a pos into coordinates
 156     // relative to the root cell of the item under mouse cursor, if any. If no
 157     // cell is found under the cursor, returns false.  Otherwise stores the new
 158     // coordinates back into @a pos and pointer to the cell under cursor into
 159     // @a cell and returns true.
 160     bool PhysicalCoordsToCell(wxPoint& pos, wxHtmlCell*& cell) const;
 161
 162     // The opposite of PhysicalCoordsToCell: converts coordinates relative to
 163     // given cell to physical coordinates in the window
 164     wxPoint CellCoordsToPhysical(const wxPoint& pos, wxHtmlCell *cell) const;
 165
 166 private:
 167     // this class caches the pre-parsed HTML to speed up display
 168     wxHtmlListBoxCache *m_cache;
 169
 170     // HTML parser we use
 171     wxHtmlWinParser *m_htmlParser;
 172
 173 #if wxUSE_FILESYSTEM
 174     // file system used by m_htmlParser
 175     wxFileSystem m_filesystem;
 176 #endif // wxUSE_FILESYSTEM
 177
 178     // rendering style for the parser which allows us to customize our colours
 179     wxHtmlListBoxStyle *m_htmlRendStyle;
 180
 181
 182     // it calls our GetSelectedTextColour() and GetSelectedTextBgColour()
 183     friend class wxHtmlListBoxStyle;
 184     friend class wxHtmlListBoxWinInterface;
 185
 186
 187     DECLARE_EVENT_TABLE()
 188     wxDECLARE_NO_COPY_CLASS(wxHtmlListBox);
 189 };
 190
 191
 192 // ----------------------------------------------------------------------------
 193 // wxSimpleHtmlListBox
 194 // ----------------------------------------------------------------------------
 195
 196 #define wxHLB_DEFAULT_STYLE     wxBORDER_SUNKEN
 197 #define wxHLB_MULTIPLE          wxLB_MULTIPLE
 198
 199 class WXDLLIMPEXP_HTML wxSimpleHtmlListBox : public wxHtmlListBox,
 200                                              public wxItemContainer
 201 {
 202 public:
 203     // wxListbox-compatible constructors
 204     // ---------------------------------
 205
 206     wxSimpleHtmlListBox() { }
 207
 208     wxSimpleHtmlListBox(wxWindow *parent,
 209                         wxWindowID id,
 210                         const wxPoint& pos = wxDefaultPosition,
 211                         const wxSize& size = wxDefaultSize,
 212                         int n = 0, const wxString choices[] = NULL,
 213                         long style = wxHLB_DEFAULT_STYLE,
 214                         const wxValidator& validator = wxDefaultValidator,
 215                         const wxString& name = wxSimpleHtmlListBoxNameStr)
 216     {
 217         Create(parent, id, pos, size, n, choices, style, validator, name);
 218     }
 219
 220     wxSimpleHtmlListBox(wxWindow *parent,
 221                         wxWindowID id,
 222                         const wxPoint& pos,
 223                         const wxSize& size,
 224                         const wxArrayString& choices,
 225                         long style = wxHLB_DEFAULT_STYLE,
 226                         const wxValidator& validator = wxDefaultValidator,
 227                         const wxString& name = wxSimpleHtmlListBoxNameStr)
 228     {
 229         Create(parent, id, pos, size, choices, style, validator, name);
 230     }
 231
 232     bool Create(wxWindow *parent, wxWindowID id,
 233                 const wxPoint& pos = wxDefaultPosition,
 234                 const wxSize& size = wxDefaultSize,
 235                 int n = 0, const wxString choices[] = NULL,
 236                 long style = wxHLB_DEFAULT_STYLE,
 237                 const wxValidator& validator = wxDefaultValidator,
 238                 const wxString& name = wxSimpleHtmlListBoxNameStr);
 239     bool Create(wxWindow *parent, wxWindowID id,
 240                 const wxPoint& pos,
 241                 const wxSize& size,
 242                 const wxArrayString& choices,
 243                 long style = wxHLB_DEFAULT_STYLE,
 244                 const wxValidator& validator = wxDefaultValidator,
 245                 const wxString& name = wxSimpleHtmlListBoxNameStr);
 246
 247     virtual ~wxSimpleHtmlListBox();
 248
 249     // these must be overloaded otherwise the compiler will complain
 250     // about  wxItemContainerImmutable::[G|S]etSelection being pure virtuals...
 251     void SetSelection(int n)
 252         { wxVListBox::SetSelection(n); }
 253     int GetSelection() const
 254         { return wxVListBox::GetSelection(); }
 255
 256     // see ctrlsub.h for more info about this:
 257     wxCONTROL_ITEMCONTAINER_CLIENTDATAOBJECT_RECAST
 258
 259
 260     // accessing strings
 261     // -----------------
 262
 263     virtual unsigned int GetCount() const
 264         { return m_items.GetCount(); }
 265
 266     virtual wxString GetString(unsigned int n) const;
 267
 268     // override default unoptimized wxItemContainer::GetStrings() function
 269     wxArrayString GetStrings() const
 270         { return m_items; }
 271
 272     virtual void SetString(unsigned int n, const wxString& s);
 273
 274     // resolve ambiguity between wxItemContainer and wxVListBox versions
 275     void Clear();
 276
 277 protected:
 278     virtual int DoInsertItems(const wxArrayStringsAdapter & items,
 279                               unsigned int pos,
 280                               void **clientData, wxClientDataType type);
 281
 282     virtual void DoSetItemClientData(unsigned int n, void *clientData)
 283         { m_HTMLclientData[n] = clientData; }
 284
 285     virtual void *DoGetItemClientData(unsigned int n) const
 286         { return m_HTMLclientData[n]; }
 287
 288     // wxItemContainer methods
 289     virtual void DoClear();
 290     virtual void DoDeleteOneItem(unsigned int n);
 291
 292     // calls wxHtmlListBox::SetItemCount() and RefreshAll()
 293     void UpdateCount();
 294
 295     // override these functions just to change their visibility: users of
 296     // wxSimpleHtmlListBox shouldn't be allowed to call them directly!
 297     virtual void SetItemCount(size_t count)
 298         { wxHtmlListBox::SetItemCount(count); }
 299     virtual void SetRowCount(size_t count)
 300         { wxHtmlListBox::SetRowCount(count); }
 301
 302     virtual wxString OnGetItem(size_t n) const
 303         { return m_items[n]; }
 304
 305     virtual void InitEvent(wxCommandEvent& event, int n)
 306         {
 307             // we're not a virtual control and we can include the string
 308             // of the item which was clicked:
 309             event.SetString(m_items[n]);
 310             wxVListBox::InitEvent(event, n);
 311         }
 312
 313     wxArrayString   m_items;
 314     wxArrayPtrVoid  m_HTMLclientData;
 315
 316     // Note: For the benefit of old compilers (like gcc-2.8) this should
 317     // not be named m_clientdata as that clashes with the name of an
 318     // anonymous struct member in wxEvtHandler, which we derive from.
 319
 320     wxDECLARE_NO_COPY_CLASS(wxSimpleHtmlListBox);
 321 };
 322
 323 #endif // _WX_HTMLLBOX_H_
 324