docs/latex/wx/htdcrend.tex

   1 %
   2 % automatically generated by HelpGen from
   3 % htmprint.h at 17/Oct/99 12:48:02
   4 %
   5
   6 \section{\class{wxHtmlDCRenderer}}\label{wxhtmldcrenderer}
   7
   8 This class can render HTML document into a specified area of a DC. You can use it
   9 in your own printing code, although use of \helpref{wxHtmlEasyPrinting}{wxhtmleasyprinting}
  10 or \helpref{wxHtmlPrintout}{wxhtmlprintout} is strongly recommended.
  11
  12 \wxheading{Derived from}
  13
  14 \helpref{wxObject}{wxobject}
  15
  16 \wxheading{Include files}
  17
  18 <wx/html/htmprint.h>
  19
  20 \latexignore{\rtfignore{\wxheading{Members}}}
  21
  22 \membersection{wxHtmlDCRenderer::wxHtmlDCRenderer}\label{wxhtmldcrendererwxhtmldcrenderer}
  23
  24 \func{}{wxHtmlDCRenderer}{\void}
  25
  26 Constructor.
  27
  28 \membersection{wxHtmlDCRenderer::SetDC}\label{wxhtmldcrenderersetdc}
  29
  30 \func{void}{SetDC}{\param{wxDC* }{dc}, \param{double }{pixel\_scale = 1.0}}
  31
  32 Assign DC instance to the renderer.
  33
  34 {\it pixel\_scale} can be used when rendering to high-resolution DCs (e.g. printer) to adjust size of pixel metrics.
  35 (Many dimensions in HTML are given in pixels -- e.g. image sizes. 300x300 image would be only one
  36 inch wide on typical printer. With pixel\_scale = 3.0 it would be 3 inches.)
  37
  38 \wxheading{Parameters}
  39
  40 \docparam{maxwidth}{width of the area (on this DC) that is equivalent to the screen's width,
  41 in pixels (you should set it to page width minus margins).
  42
  43 {\bf Note:} In the current implementation
  44 the screen width is always 800 pixels: it gives best results and ensures (almost) same printed outputs
  45 across platforms and differently configured desktops.}
  46
  47 See also \helpref{SetSize}{wxhtmldcrenderersetsize}.
  48
  49 \membersection{wxHtmlDCRenderer::SetSize}\label{wxhtmldcrenderersetsize}
  50
  51 \func{void}{SetSize}{\param{int }{width}, \param{int }{height}}
  52
  53 Set size of output rectangle, in pixels. Note that you {\bf can't} change
  54 width of the rectangle between calls to \helpref{Render}{wxhtmldcrendererrender}!
  55 (You can freely change height.)
  56
  57 \membersection{wxHtmlDCRenderer::SetHtmlText}\label{wxhtmldcrenderersethtmltext}
  58
  59 \func{void}{SetHtmlText}{\param{const wxString\& }{html}, \param{const wxString\& }{basepath = wxEmptyString}, \param{bool }{isdir = true}}
  60
  61 Assign text to the renderer. \helpref{Render}{wxhtmldcrendererrender} then draws
  62 the text onto DC.
  63
  64 \wxheading{Parameters}
  65
  66 \docparam{html}{HTML text. This is {\it not} a filename.}
  67
  68 \docparam{basepath}{base directory (html string would be stored there if it was in
  69 file). It is used to determine path for loading images, for example.}
  70
  71 \docparam{isdir}{false if basepath is filename, true if it is directory name
  72 (see \helpref{wxFileSystem}{wxfilesystem} for detailed explanation)}
  73
  74 \membersection{wxHtmlDCRenderer::Render}\label{wxhtmldcrendererrender}
  75
  76 \func{int}{Render}{\param{int }{x}, \param{int }{y}, \param{int }{from = 0}, \param{int }{dont\_render = false}}
  77
  78 Renders HTML text to the DC.
  79
  80 \wxheading{Parameters}
  81
  82 \docparam{x,y}{ position of upper-left corner of printing rectangle (see \helpref{SetSize}{wxhtmldcrenderersetsize})}
  83
  84 \docparam{from}{y-coordinate of the very first visible cell}
  85
  86 \docparam{dont\_render}{if true then this method only returns y coordinate of the next page
  87 and does not output anything}
  88
  89 Returned value is y coordinate of first cell than didn't fit onto page.
  90 Use this value as {\it from} in next call to Render in order to print multipages
  91 document.
  92
  93 \wxheading{Caution!}
  94
  95 The Following three methods {\bf must} always be called before any call to Render (preferably
  96 in this order):
  97
  98 \begin{itemize}\itemsep=0pt
  99 \item \helpref{SetDC}{wxhtmldcrenderersetdc}
 100 \item \helpref{SetSize}{wxhtmldcrenderersetsize}
 101 \item \helpref{SetHtmlText}{wxhtmldcrenderersethtmltext}
 102 \end{itemize}
 103
 104 {\bf Render() changes the DC's user scale and does NOT restore it.}
 105
 106 \membersection{wxHtmlDCRenderer::GetTotalHeight}\label{wxhtmldcrenderergettotalheight}
 107
 108 \func{int}{GetTotalHeight}{\void}
 109
 110 Returns the height of the HTML text. This is important if area height (see \helpref{SetSize}{wxhtmldcrenderersetsize})
 111 is smaller that total height and thus the page cannot fit into it. In that case you're supposed to
 112 call \helpref{Render}{wxhtmldcrendererrender} as long as its return value is smaller than GetTotalHeight's.
 113