EVOLUTION-MANAGER
Edit File: drawDetails.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Customising grid Drawing</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="R.css" /> </head><body> <table width="100%" summary="page for drawDetails {grid}"><tr><td>drawDetails {grid}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2> Customising grid Drawing </h2> <h3>Description</h3> <p>These generic hook functions are called whenever a grid grob is drawn. They provide an opportunity for customising the drawing of a new class derived from grob (or gTree). </p> <h3>Usage</h3> <pre> drawDetails(x, recording) preDrawDetails(x) postDrawDetails(x) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>x</code></td> <td> <p> A grid grob. </p> </td></tr> <tr valign="top"><td><code>recording</code></td> <td> <p> A logical value indicating whether a grob is being added to the display list or redrawn from the display list. </p> </td></tr> </table> <h3>Details</h3> <p>These functions are called by the <code>grid.draw</code> methods for grobs and gTrees. </p> <p><code>preDrawDetails</code> is called first during the drawing of a grob. This is where any additional viewports should be pushed (see, for example, <code>grid:::preDrawDetails.frame</code>). Note that the default behaviour for grobs is to push any viewports in the <code>vp</code> slot, and for gTrees is to also push and up any viewports in the <code>childrenvp</code> slot so there is typically nothing to do here. </p> <p><code>drawDetails</code> is called next and is where any additional calculations and graphical output should occur (see, for example, <code>grid:::drawDetails.xaxis</code>). Note that the default behaviour for gTrees is to draw all grobs in the <code>children</code> slot so there is typically nothing to do here. </p> <p><code>postDrawDetails</code> is called last and should reverse anything done in <code>preDrawDetails</code> (i.e., pop or up any viewports that were pushed; again, see, for example, <code>grid:::postDrawDetails.frame</code>). Note that the default behaviour for grobs is to pop any viewports that were pushed so there is typically nothing to do here. </p> <p>Note that <code>preDrawDetails</code> and <code>postDrawDetails</code> are also called in the calculation of <code>"grobwidth"</code> and <code>"grobheight"</code> units. </p> <h3>Value</h3> <p>None of these functions are expected to return a value. </p> <h3>Author(s)</h3> <p> Paul Murrell </p> <h3>See Also</h3> <p><code><a href="grid.draw.html">grid.draw</a></code> </p> <hr /><div style="text-align: center;">[Package <em>grid</em> version 3.6.0 <a href="00Index.html">Index</a>]</div> </body></html>