<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <title>Qwt Polar User's Guide: QwtPolarMagnifier Class Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="doxygen.css" rel="stylesheet" type="text/css"/> </head> <body> <!-- Generated by Doxygen 1.7.4 --> <div id="top"> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">Qwt Polar User's Guide <span id="projectnumber">0.1.0</span></div> </td> </tr> </tbody> </table> </div> <div id="navrow1" class="tabs"> <ul class="tablist"> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> <li class="current"><a href="annotated.html"><span>Classes</span></a></li> <li><a href="files.html"><span>Files</span></a></li> </ul> </div> <div id="navrow2" class="tabs2"> <ul class="tablist"> <li><a href="annotated.html"><span>Class List</span></a></li> <li><a href="classes.html"><span>Class Index</span></a></li> <li><a href="inherits.html"><span>Class Hierarchy</span></a></li> <li><a href="functions.html"><span>Class Members</span></a></li> </ul> </div> </div> <div class="header"> <div class="summary"> <a href="#pub-methods">Public Member Functions</a> | <a href="#pro-methods">Protected Member Functions</a> </div> <div class="headertitle"> <div class="title">QwtPolarMagnifier Class Reference</div> </div> </div> <div class="contents"> <!-- doxytag: class="QwtPolarMagnifier" --> <p><a class="el" href="class_qwt_polar_magnifier.html" title="QwtPolarMagnifier provides zooming, by magnifying in steps.">QwtPolarMagnifier</a> provides zooming, by magnifying in steps. <a href="class_qwt_polar_magnifier.html#details">More...</a></p> <p><code>#include <<a class="el" href="qwt__polar__magnifier_8h_source.html">qwt_polar_magnifier.h</a>></code></p> <p><a href="class_qwt_polar_magnifier-members.html">List of all members.</a></p> <table class="memberdecls"> <tr><td colspan="2"><h2><a name="pub-methods"></a> Public Member Functions</h2></td></tr> <tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_magnifier.html#ae18757a8ee2be73c4cf264720cb37d18">QwtPolarMagnifier</a> (<a class="el" href="class_qwt_polar_canvas.html">QwtPolarCanvas</a> *)</td></tr> <tr><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_magnifier.html#ae8e07b7b25186ef3db390f2792e960d5">~QwtPolarMagnifier</a> ()</td></tr> <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_magnifier.html#a87548a332156609548d036bce63239cf">setUnzoomKey</a> (int key, int modifiers)</td></tr> <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_magnifier.html#a6a68d42d2b1d56576408f07dbb197f32">getUnzoomKey</a> (int &key, int &modifiers) const </td></tr> <tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_qwt_polar_plot.html">QwtPolarPlot</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_magnifier.html#aabb702a524ca685d410005003c6fdf52">plot</a> ()</td></tr> <tr><td class="memItemLeft" align="right" valign="top">const <a class="el" href="class_qwt_polar_plot.html">QwtPolarPlot</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_magnifier.html#a183034e5548f07d71e46984c1b5591fb">plot</a> () const </td></tr> <tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_qwt_polar_canvas.html">QwtPolarCanvas</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_magnifier.html#ab7542ea6d40639e29fd5e802220922eb">canvas</a> ()</td></tr> <tr><td class="memItemLeft" align="right" valign="top">const <a class="el" href="class_qwt_polar_canvas.html">QwtPolarCanvas</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_magnifier.html#a8f27d27d30efeb717daea14d8d9228f9">canvas</a> () const </td></tr> <tr><td colspan="2"><h2><a name="pro-methods"></a> Protected Member Functions</h2></td></tr> <tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_magnifier.html#a5baa0adfe77369414a52941d4b894b7f">rescale</a> (double factor)</td></tr> <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_magnifier.html#a7785d799a0fd09225baaefaa36de9671">unzoom</a> ()</td></tr> <tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_polar_magnifier.html#a5276d05e09936f608d6e7d06d5f58ace">widgetKeyPressEvent</a> (QKeyEvent *)</td></tr> </table> <hr/><a name="details" id="details"></a><h2>Detailed Description</h2> <div class="textblock"><p><a class="el" href="class_qwt_polar_magnifier.html" title="QwtPolarMagnifier provides zooming, by magnifying in steps.">QwtPolarMagnifier</a> provides zooming, by magnifying in steps. </p> <p>Using QwtPlotMagnifier a plot can be zoomed in/out in steps using keys, the mouse wheel or moving a mouse button in vertical direction.</p> <p>Together with <a class="el" href="class_qwt_polar_panner.html" title="QwtPolarPanner provides panning of a polar plot canvas.">QwtPolarPanner</a> it is possible to implement an individual navigation of the plot canvas.</p> <dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_polar_panner.html" title="QwtPolarPanner provides panning of a polar plot canvas.">QwtPolarPanner</a>, <a class="el" href="class_qwt_polar_plot.html" title="A plotting widget, displaying a polar coordinate system.">QwtPolarPlot</a>, <a class="el" href="class_qwt_polar_canvas.html" title="Canvas of a QwtPolarPlot.">QwtPolarCanvas</a> </dd></dl> </div><hr/><h2>Constructor & Destructor Documentation</h2> <a class="anchor" id="ae18757a8ee2be73c4cf264720cb37d18"></a><!-- doxytag: member="QwtPolarMagnifier::QwtPolarMagnifier" ref="ae18757a8ee2be73c4cf264720cb37d18" args="(QwtPolarCanvas *)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">QwtPolarMagnifier::QwtPolarMagnifier </td> <td>(</td> <td class="paramtype"><a class="el" href="class_qwt_polar_canvas.html">QwtPolarCanvas</a> * </td> <td class="paramname"><em>canvas</em></td><td>)</td> <td><code> [explicit]</code></td> </tr> </table> </div> <div class="memdoc"> <p>Constructor </p> <dl><dt><b>Parameters:</b></dt><dd> <table class="params"> <tr><td class="paramname">canvas</td><td>Plot canvas to be magnified </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="ae8e07b7b25186ef3db390f2792e960d5"></a><!-- doxytag: member="QwtPolarMagnifier::~QwtPolarMagnifier" ref="ae8e07b7b25186ef3db390f2792e960d5" args="()" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">QwtPolarMagnifier::~QwtPolarMagnifier </td> <td>(</td> <td class="paramname"></td><td>)</td> <td><code> [virtual]</code></td> </tr> </table> </div> <div class="memdoc"> <p>Destructor. </p> </div> </div> <hr/><h2>Member Function Documentation</h2> <a class="anchor" id="ab7542ea6d40639e29fd5e802220922eb"></a><!-- doxytag: member="QwtPolarMagnifier::canvas" ref="ab7542ea6d40639e29fd5e802220922eb" args="()" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="class_qwt_polar_canvas.html">QwtPolarCanvas</a> * QwtPolarMagnifier::canvas </td> <td>(</td> <td class="paramname"></td><td>)</td> <td></td> </tr> </table> </div> <div class="memdoc"> <p>Return observed plot canvas. </p> </div> </div> <a class="anchor" id="a8f27d27d30efeb717daea14d8d9228f9"></a><!-- doxytag: member="QwtPolarMagnifier::canvas" ref="a8f27d27d30efeb717daea14d8d9228f9" args="() const " --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">const <a class="el" href="class_qwt_polar_canvas.html">QwtPolarCanvas</a> * QwtPolarMagnifier::canvas </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </div> <div class="memdoc"> <dl class="return"><dt><b>Returns:</b></dt><dd>observed plot canvas </dd></dl> </div> </div> <a class="anchor" id="a6a68d42d2b1d56576408f07dbb197f32"></a><!-- doxytag: member="QwtPolarMagnifier::getUnzoomKey" ref="a6a68d42d2b1d56576408f07dbb197f32" args="(int &key, int &modifiers) const " --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void QwtPolarMagnifier::getUnzoomKey </td> <td>(</td> <td class="paramtype">int & </td> <td class="paramname"><em>key</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int & </td> <td class="paramname"><em>modifiers</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td> const</td> </tr> </table> </div> <div class="memdoc"> <dl class="return"><dt><b>Returns:</b></dt><dd>Key, and modifiers that are used for unzooming</dd></dl> <dl><dt><b>Parameters:</b></dt><dd> <table class="params"> <tr><td class="paramname">key</td><td>Key code </td></tr> <tr><td class="paramname">modifiers</td><td>Modifiers </td></tr> </table> </dd> </dl> <dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_polar_magnifier.html#a87548a332156609548d036bce63239cf">setUnzoomKey()</a>, <a class="el" href="class_qwt_polar_plot.html#a43f40adc59f7acb4f609e48be2327ade">QwtPolarPlot::unzoom()</a> </dd></dl> </div> </div> <a class="anchor" id="a183034e5548f07d71e46984c1b5591fb"></a><!-- doxytag: member="QwtPolarMagnifier::plot" ref="a183034e5548f07d71e46984c1b5591fb" args="() const " --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">const <a class="el" href="class_qwt_polar_plot.html">QwtPolarPlot</a> * QwtPolarMagnifier::plot </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </div> <div class="memdoc"> <p>Return observed plot. </p> </div> </div> <a class="anchor" id="aabb702a524ca685d410005003c6fdf52"></a><!-- doxytag: member="QwtPolarMagnifier::plot" ref="aabb702a524ca685d410005003c6fdf52" args="()" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="class_qwt_polar_plot.html">QwtPolarPlot</a> * QwtPolarMagnifier::plot </td> <td>(</td> <td class="paramname"></td><td>)</td> <td></td> </tr> </table> </div> <div class="memdoc"> <p>Return observed plot. </p> </div> </div> <a class="anchor" id="a5baa0adfe77369414a52941d4b894b7f"></a><!-- doxytag: member="QwtPolarMagnifier::rescale" ref="a5baa0adfe77369414a52941d4b894b7f" args="(double factor)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void QwtPolarMagnifier::rescale </td> <td>(</td> <td class="paramtype">double </td> <td class="paramname"><em>factor</em></td><td>)</td> <td><code> [protected, virtual]</code></td> </tr> </table> </div> <div class="memdoc"> <p>Zoom in/out the zoomed area </p> <dl><dt><b>Parameters:</b></dt><dd> <table class="params"> <tr><td class="paramname">factor</td><td>A value < 1.0 zooms in, a value > 1.0 zooms out. </td></tr> </table> </dd> </dl> </div> </div> <a class="anchor" id="a87548a332156609548d036bce63239cf"></a><!-- doxytag: member="QwtPolarMagnifier::setUnzoomKey" ref="a87548a332156609548d036bce63239cf" args="(int key, int modifiers)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void QwtPolarMagnifier::setUnzoomKey </td> <td>(</td> <td class="paramtype">int </td> <td class="paramname"><em>key</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int </td> <td class="paramname"><em>modifiers</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div> <div class="memdoc"> <p>Assign key and modifiers, that are used for unzooming The default combination is Qt::Key_Home + Qt::NoModifier.</p> <dl><dt><b>Parameters:</b></dt><dd> <table class="params"> <tr><td class="paramname">key</td><td>Key code </td></tr> <tr><td class="paramname">modifiers</td><td>Modifiers </td></tr> </table> </dd> </dl> <dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_polar_magnifier.html#a6a68d42d2b1d56576408f07dbb197f32">getUnzoomKey()</a>, <a class="el" href="class_qwt_polar_plot.html#a43f40adc59f7acb4f609e48be2327ade">QwtPolarPlot::unzoom()</a> </dd></dl> </div> </div> <a class="anchor" id="a7785d799a0fd09225baaefaa36de9671"></a><!-- doxytag: member="QwtPolarMagnifier::unzoom" ref="a7785d799a0fd09225baaefaa36de9671" args="()" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void QwtPolarMagnifier::unzoom </td> <td>(</td> <td class="paramname"></td><td>)</td> <td><code> [protected]</code></td> </tr> </table> </div> <div class="memdoc"> <p>Unzoom the plot widget. </p> </div> </div> <a class="anchor" id="a5276d05e09936f608d6e7d06d5f58ace"></a><!-- doxytag: member="QwtPolarMagnifier::widgetKeyPressEvent" ref="a5276d05e09936f608d6e7d06d5f58ace" args="(QKeyEvent *)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void QwtPolarMagnifier::widgetKeyPressEvent </td> <td>(</td> <td class="paramtype">QKeyEvent * </td> <td class="paramname"><em>ke</em></td><td>)</td> <td><code> [protected, virtual]</code></td> </tr> </table> </div> <div class="memdoc"> <p>Handle a key press event for the observed widget.</p> <dl><dt><b>Parameters:</b></dt><dd> <table class="params"> <tr><td class="paramname">ke</td><td>Key event </td></tr> </table> </dd> </dl> </div> </div> </div> <hr class="footer"/><address class="footer"><small>Generated on Sun Jul 17 2011 for Qwt Polar User's Guide by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.4 </small></address> </body> </html>