X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/704a4b7524e05d7bf4d208eb1b30be9989abef4c..21db32c1294eff5c1b6b087d260d2accc17abb53:/docs/latex/wx/htmlprn.tex diff --git a/docs/latex/wx/htmlprn.tex b/docs/latex/wx/htmlprn.tex index 700a1e271d..f52852c23a 100644 --- a/docs/latex/wx/htmlprn.tex +++ b/docs/latex/wx/htmlprn.tex @@ -1,62 +1,13 @@ -\membersection{Printing}\label{printing} +\subsection{HTML Printing}\label{printing} -The wxHTML library provides printing facilities. +The wxHTML library provides printing facilities with several levels of complexity. -You can redirect output displayed by \helpref{wxHtmlWindow}{wxhtmlwindow} -to the printer DC using this (or similar) code (see {\bf printing} sample for -more details) : +The easiest way to print an HTML document is to use +\helpref{wxHtmlEasyPrinting class}{wxhtmleasyprinting}. It lets you print HTML documents with only one +command and you don't have to worry about deriving from the wxPrintout class at all. It is only a simple wrapper around the +\helpref{wxHtmlPrintout}{wxhtmlprintout}, normal wxWidgets printout class. -\begin{verbatim} -// -// This method prints page number one to dc: -// +And finally there is the low level class \helpref{wxHtmlDCRenderer}{wxhtmldcrenderer} which you can use to +render HTML into a rectangular area on any DC. It supports rendering into multiple rectangles with the same +width. (The most common use of this is placing one rectangle on each page or printing into two columns.) -void MyPrintout::DrawPageOne(wxDC *dc) -{ - int leftMargin = 20; - int topMargin = 50; - // You must compute the margins there. - // Caution! These values are NOT in printer DC's units. - // These values are in screen pixels. - // (see bellow) - - // Here we obtain internal cell representation of HTML document: - // (html is our pointer to wxHtmlWindow object) - wxHtmlContainerCell *cell = html -> GetInternalRepresentation(); - - // Now we have to check in case our real page size is reduced - // (e.g. because we're drawing to a print preview memory DC) - int pageWidth, pageHeight; - int w, h; - dc->GetSize(&w, &h); // DC size - GetPageSizePixels(&pageWidth, &pageHeight); // real size - - // Now we must scale it. This equation will map wxHtmlWindow - // to page in this way: - // |--this is whole page as printed---------| - // | | | | - // | | | | - // |-margin-|-----wxHtmlWindow-----|-margin-| - // - // So page width is 2*leftMargin + [wxHtmlWindow size] - // (measured in screen pixels). - // We will scale the printer DC so that wxHtmlWindow's content - // spreads from left to right: - float scale = (float)( - (float)(pageWidth) / - (float)(2 * leftMargin + cell -> GetMaxLineWidth())); - - // If printer pageWidth == current DC width, then this doesn't - // change. But w might be the preview bitmap width, so scale down. - float overallScale = scale * (float)(w/(float)pageWidth); - - // Set the user scale so that our computations take effect: - dc->SetUserScale(overallScale, overallScale); - dc->SetBackgroundMode(wxTRANSPARENT); - - // And this is - finally - HTML stuff: - cell -> Draw(*dc, leftMargin, topMargin, 0, cell -> GetHeight()); -} -\end{verbatim} - -(Thanks to Julian Smart for sample)