docs/latex/wx/htcell.tex

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   2 % automatically generated by HelpGen from
   3 % htmlcell.tex at 21/Mar/99 22:45:23
   4 %
   5
   6 \section{\class{wxHtmlCell}}\label{wxhtmlcell}
   7
   8 Internal data structure. It represents fragments of parsed HTML
   9 page, the so-called {\bf cell} - a word, picture, table, horizontal line and so on.
  10 It is used by \helpref{wxHtmlWindow}{wxhtmlwindow} and
  11 \helpref{wxHtmlWinParser}{wxhtmlwinparser} to represent HTML page in memory.
  12
  13 You can divide cells into two groups : {\it visible} cells with non-zero width and
  14 height and {\it helper} cells (usually with zero width and height) that
  15 perform special actions such as color or font change.
  16
  17 \wxheading{Derived from}
  18
  19 \helpref{wxObject}{wxobject}
  20
  21 \wxheading{Include files}
  22
  23 <wx/html/htmlcell.h>
  24
  25 \wxheading{See Also}
  26
  27 \helpref{Cells Overview}{cells},
  28 \helpref{wxHtmlContainerCell}{wxhtmlcontainercell}
  29
  30 \latexignore{\rtfignore{\wxheading{Members}}}
  31
  32 \membersection{wxHtmlCell::wxHtmlCell}\label{wxhtmlcellwxhtmlcell}
  33
  34 \func{}{wxHtmlCell}{\void}
  35
  36 Constructor.
  37
  38 \membersection{wxHtmlCell::AdjustPagebreak}\label{wxhtmlcelladjustpagebreak}
  39
  40 \func{virtual bool}{AdjustPagebreak}{\param{int * }{pagebreak}}
  41
  42 This method is used to adjust pagebreak position. The parameter is
  43 variable that contains y-coordinate of page break (= horizontal line that
  44 should not be crossed by words, images etc.). If this cell cannot be divided
  45 into two pieces (each one on another page) then it moves the pagebreak
  46 few pixels up.
  47
  48 Returns TRUE if pagebreak was modified, FALSE otherwise
  49
  50 Usage:
  51 \begin{verbatim}
  52 while (container->AdjustPagebreak(&p)) {}
  53 \end{verbatim}
  54
  55 \membersection{wxHtmlCell::Draw}\label{wxhtmlcelldraw}
  56
  57 \func{virtual void}{Draw}{\param{wxDC\& }{dc}, \param{int }{x}, \param{int }{y}, \param{int }{view\_y1}, \param{int }{view\_y2}}
  58
  59 Renders the cell.
  60
  61 \wxheading{Parameters}
  62
  63 \docparam{dc}{Device context to which the cell is to be drawn}
  64
  65 \docparam{x,y}{Coordinates of parent's upper left corner (origin). You must
  66 add this to m\_PosX,m\_PosY when passing coordinates to dc's methods
  67 Example : {\tt dc -> DrawText("hello", x + m\_PosX, y + m\_PosY)}}
  68
  69 \docparam{view\_y1}{y-coord of the first line visible in window. This is
  70 used to optimize rendering speed}
  71
  72 \docparam{view\_y2}{y-coord of the last line visible in window. This is
  73 used to optimize rendering speed}
  74
  75 \membersection{wxHtmlCell::DrawInvisible}\label{wxhtmlcelldrawinvisible}
  76
  77 \func{virtual void}{DrawInvisible}{\param{wxDC\& }{dc}, \param{int }{x}, \param{int }{y}}
  78
  79 This method is called instead of \helpref{Draw}{wxhtmlcelldraw} when the
  80 cell is certainly out of the screen (and thus invisible). This is not
  81 nonsense - some tags (like \helpref{wxHtmlColourCell}{wxhtmlcolourcell}
  82 or font setter) must be drawn even if they are invisible!
  83
  84 \wxheading{Parameters}
  85
  86 \docparam{dc}{Device context to which the cell is to be drawn}
  87
  88 \docparam{x,y}{Coordinates of parent's upper left corner. You must
  89 add this to m\_PosX,m\_PosY when passing coordinates to dc's methods
  90 Example : {\tt dc -> DrawText("hello", x + m\_PosX, y + m\_PosY)}}
  91
  92 \membersection{wxHtmlCell::Find}\label{wxhtmlcellfind}
  93
  94 \func{virtual const wxHtmlCell*}{Find}{\param{int }{condition}, \param{const void* }{param}}
  95
  96 Returns pointer to itself if this cell matches condition (or if any of the cells
  97 following in the list matches), NULL otherwise.
  98 (In other words if you call top-level container's Find it will
  99 return pointer to the first cell that matches the condition)
 100
 101 It is recommended way how to obtain pointer to particular cell or
 102 to cell of some type (e.g. wxHtmlAnchorCell reacts on
 103 wxHTML\_COND\_ISANCHOR condition)
 104
 105 \wxheading{Parameters}
 106
 107 \docparam{condition}{Unique integer identifier of condition}
 108
 109 \docparam{param}{Optional parameters}
 110
 111 \wxheading{Defined conditions}
 112
 113 \begin{twocollist}\itemsep=0pt
 114 \twocolitem{{\bf wxHTML\_COND\_ISANCHOR}}{Finds particular anchor.
 115 {\it param} is pointer to wxString with name of the anchor.}
 116 \twocolitem{{\bf wxHTML\_COND\_USER}}{User-defined conditions start
 117 from this number.}
 118 \end{twocollist}
 119
 120 \membersection{wxHtmlCell::GetDescent}\label{wxhtmlcellgetdescent}
 121
 122 \constfunc{int}{GetDescent}{\void}
 123
 124 Returns descent value of the cell (m\_Descent member).
 125 \helponly{See explanation:
 126
 127 \image{}{descent.bmp}
 128 }
 129
 130 \membersection{wxHtmlCell::GetHeight}\label{wxhtmlcellgetheight}
 131
 132 \constfunc{int}{GetHeight}{\void}
 133
 134 Returns height of the cell (m\_Height member).
 135
 136 \membersection{wxHtmlCell::GetLink}\label{wxhtmlcellgetlink}
 137
 138 \constfunc{virtual wxHtmlLinkInfo*}{GetLink}{\param{int }{x = 0}, \param{int }{y = 0}}
 139
 140 Returns hypertext link if associated with this cell or NULL otherwise.
 141 See \helpref{wxHtmlLinkInfo}{wxhtmllinkinfo}.
 142 (Note: this makes sense only for visible tags).
 143
 144 \wxheading{Parameters}
 145
 146 \docparam{x,y}{Coordinates of position where the user pressed mouse button.
 147 These coordinates are used e.g. by COLORMAP. Values are relative to the
 148 upper left corner of THIS cell (i.e. from 0 to m\_Width or m\_Height)}
 149
 150 \membersection{wxHtmlCell::GetNext}\label{wxhtmlcellgetnext}
 151
 152 \constfunc{wxHtmlCell*}{GetNext}{\void}
 153
 154 Returns pointer to the next cell in list (see htmlcell.h if you're
 155 interested in details).
 156
 157 \membersection{wxHtmlCell::GetParent}\label{wxhtmlcellgetparent}
 158
 159 \constfunc{wxHtmlContainerCell*}{GetParent}{\void}
 160
 161 Returns pointer to parent container.
 162
 163 \membersection{wxHtmlCell::GetPosX}\label{wxhtmlcellgetposx}
 164
 165 \constfunc{int}{GetPosX}{\void}
 166
 167 Returns X position within parent (the value is relative to parent's
 168 upper left corner). The returned value is meaningful only if
 169 parent's \helpref{Layout}{wxhtmlcelllayout} was called before!
 170
 171 \membersection{wxHtmlCell::GetPosY}\label{wxhtmlcellgetposy}
 172
 173 \constfunc{int}{GetPosY}{\void}
 174
 175 Returns Y position within parent (the value is relative to parent's
 176 upper left corner). The returned value is meaningful only if
 177 parent's \helpref{Layout}{wxhtmlcelllayout} was called before!
 178
 179 \membersection{wxHtmlCell::GetWidth}\label{wxhtmlcellgetwidth}
 180
 181 \constfunc{int}{GetWidth}{\void}
 182
 183 Returns width of the cell (m\_Width member).
 184
 185 \membersection{wxHtmlCell::Layout}\label{wxhtmlcelllayout}
 186
 187 \func{virtual void}{Layout}{\param{int }{w}}
 188
 189 This method performs two actions:
 190
 191 \begin{enumerate}\itemsep=0pt
 192 \item adjusts the cell's width according to the fact that maximal possible width is {\it w}.
 193 (this has sense when working with horizontal lines, tables etc.)
 194 \item prepares layout (=fill-in m\_PosX, m\_PosY (and sometimes m\_Height) members)
 195 based on actual width {\it w}
 196 \end{enumerate}
 197
 198 It must be called before displaying cells structure because
 199 m\_PosX and m\_PosY are undefined (or invalid)
 200 before calling Layout.
 201
 202 \membersection{wxHtmlCell::OnMouseClick}\label{wxhtmlcellonmouseclick}
 203
 204 \func{virtual void}{OnMouseClick}{\param{wxWindow* }{parent}, \param{int}{x}, \param{int }{y}, \param{const wxMouseEvent\& }{event}}
 205
 206 This function is simple event handler. Each time the user clicks mouse button over a cell
 207 within \helpref{wxHtmlWindow}{wxhtmlwindow} this method of that cell is called. Default behavior is
 208 that it calls \helpref{wxHtmlWindow::LoadPage}{wxhtmlwindowloadpage}.
 209
 210 \wxheading{Note}
 211
 212 If you need more "advanced" event handling
 213 you should use wxHtmlBinderCell instead.
 214
 215 \wxheading{Parameters}
 216
 217 \docparam{parent}{parent window (always wxHtmlWindow!)}
 218
 219 \docparam{x, y}{coordinates of mouse click (this is relative to cell's origin}
 220
 221 \docparam{left, middle, right}{boolean flags for mouse buttons. TRUE if the left/middle/right
 222 button is pressed, FALSE otherwise}
 223
 224 \membersection{wxHtmlCell::SetLink}\label{wxhtmlcellsetlink}
 225
 226 \func{void}{SetLink}{\param{const wxHtmlLinkInfo\& }{link}}
 227
 228 Sets the hypertext link asocciated with this cell. (Default value
 229 is \helpref{wxHtmlLinkInfo}{wxhtmllinkinfo}("", "") (no link))
 230
 231 \membersection{wxHtmlCell::SetNext}\label{wxhtmlcellsetnext}
 232
 233 \func{void}{SetNext}{\param{wxHtmlCell }{*cell}}
 234
 235 Sets the next cell in the list. This shouldn't be called by user - it is
 236 to be used only by \helpref{wxHtmlContainerCell::InsertCell}{wxhtmlcontainercellinsertcell}.
 237
 238 \membersection{wxHtmlCell::SetParent}\label{wxhtmlcellsetparent}
 239
 240 \func{void}{SetParent}{\param{wxHtmlContainerCell }{*p}}
 241
 242 Sets parent container of this cell. This is called from
 243 \helpref{wxHtmlContainerCell::InsertCell}{wxhtmlcontainercellinsertcell}.
 244
 245 \membersection{wxHtmlCell::SetPos}\label{wxhtmlcellsetpos}
 246
 247 \func{void}{SetPos}{\param{int }{x}, \param{int }{y}}
 248
 249 Sets the cell's position within parent container.
 250