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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>Qwt User's Guide: QwtCounter Class Reference</title>
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<div id="projectname">Qwt User's Guide <span id="projectnumber">5.2.2</span></div>
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<div class="header">
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<a href="#pub-types">Public Types</a> |
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<a href="#pro-methods">Protected Member Functions</a> </div>
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<h1>QwtCounter Class Reference</h1> </div>
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<div class="contents">
<!-- doxytag: class="QwtCounter" --><!-- doxytag: inherits="QwtDoubleRange" -->
<p>The Counter Widget.
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="qwt__counter_8h_source.html">qwt_counter.h</a>></code></p>
<div class="dynheader">
Inheritance diagram for QwtCounter:</div>
<div class="dyncontent">
<div class="center"><img src="class_qwt_counter__inherit__graph.png" border="0" usemap="#_qwt_counter_inherit__map" alt="Inheritance graph"/></div>
<map name="_qwt_counter_inherit__map" id="_qwt_counter_inherit__map">
<area shape="rect" id="node2" href="class_qwt_double_range.html" title="A class which controls a value within an interval." alt="" coords="5,6,128,37"/></map>
<center><span class="legend">[<a href="graph_legend.html">legend</a>]</span></center></div>
<p><a href="class_qwt_counter-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a027cfd91946ca9a19a1d606411e0f374">Button</a> { <br/>
  <b>Button1</b>,
<br/>
  <b>Button2</b>,
<br/>
  <b>Button3</b>,
<br/>
  <b>ButtonCnt</b>
<br/>
}</td></tr>
<tr><td colspan="2"><h2><a name="signals"></a>
Signals</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a694ed7277e137e44bccc5918b4c15ecc">buttonReleased</a> (double value)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#add02928c348417fbfadd7095d058f331">valueChanged</a> (double value)</td></tr>
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a8817a2b253273d694b02a81feb76ef64">editable</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#a63bc8ea5e7ecd776b7d32d21db1ea668">fitValue</a> (double)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#a19b85337d4ab0b5f0579b02e4fb29a8f">incPages</a> (int)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a9c81b37e547358cc588311d941649de1">incSteps</a> (<a class="el" href="class_qwt_counter.html#a027cfd91946ca9a19a1d606411e0f374">QwtCounter::Button</a> btn) const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#a299c35c72e9b69f5a0e3dcd2b7da775b">incValue</a> (int)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#afc4921deb3f68a64cc08b0654a040bc6">isValid</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#acf0edc717951ef75d94789b68cd073e6">maxVal</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#a215275a1a8b4218a424ee8444c7fe409">maxValue</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a491c846d83a5b7e6de27bc98de70279e">minVal</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#a8b8650a6f8a96144d3af21207ee71637">minValue</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#ac160c5e7a1c7f858b7f52ff0904ea142">numButtons</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#ac12a5c43dc5839913379982ec40a39d8">pageSize</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#ad1efbcbf29dbc74f3f378292b76b007b">periodic</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a19824b7542778b23372fb77fac75beb8">polish</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#aee94cdbaf1f3d22e110fd3535dbca34a">QwtCounter</a> (QWidget *parent=NULL)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a2d2f4bf2813d2aa30c2fb9ec7a90163c">setEditable</a> (bool)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a6aa68e7fc717fb0e2e48a978301c96eb">setIncSteps</a> (<a class="el" href="class_qwt_counter.html#a027cfd91946ca9a19a1d606411e0f374">QwtCounter::Button</a> btn, int nSteps)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#afd1de4657645bd41a8ccdaa21a7dc591">setMaxValue</a> (double m)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a8c1b902c0805f3581568b4d700e79221">setMinValue</a> (double m)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#ae9241fda2e375becdb484cc2cf7752f4">setNumButtons</a> (int n)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#a95fa6a4e44fc47726d939155bb6f6f1f">setPeriodic</a> (bool tf)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#a43891011664b74b8e5454763a3f5ff21">setRange</a> (double vmin, double vmax, double vstep=0.0, int pagesize=1)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#ab885e97d0071877dfefb73feb0adc0cd">setStep</a> (double s)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#ae56a556a72955b6d10419f2c41779383">setStepButton1</a> (int nSteps)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a0d764a96706593d8c8b51338e92abfcc">setStepButton2</a> (int nSteps)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a8b55539578de083793b8310cb8909294">setStepButton3</a> (int nSteps)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#a50a9c386663e170016a74cf8ee28ab8f">setValid</a> (bool)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a429a2e986aa46c1231643df5d4c78970">setValue</a> (double)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual QSize </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a9ccdfd602ccd5ecd8595172cd22b2b27">sizeHint</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#ab3496bdd6bdb093462bca588880d8c1b">step</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a8e0b28f111c45b3a2241fd8889bc8bce">stepButton1</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a7d99de95e1c05e4994413e6d8cd641fe">stepButton2</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#abc6eb2073cc7d7b5f1d7e4c6c7b205c9">stepButton3</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a121194fadd8cea929c1ac9509f27fe58">value</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a6469133eb210b470023a3dcc735aec4d">~QwtCounter</a> ()</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 bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#ad855f1cec9068fd73cce5e2e29fb5771">event</a> (QEvent *)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#a595c04ed863eb7f0adaf94440087fe0a">exactPrevValue</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#a705b76d28882d37bc5313d6c38c9a720">exactValue</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#aafdc19bff96fcafc4b8ed8e3bf7bf07b">keyPressEvent</a> (QKeyEvent *)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_double_range.html#a38768187bef94dd5e5a2c8664746b365">prevValue</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_counter.html#a4fd4e750b1f5a852250e57778a3e4159">rangeChange</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_double_range.html#a86641f8755ed172ca4cf72d36df539ca">stepChange</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_counter.html#acdada1ba1d5873b9c8b3f75d63b4685a">wheelEvent</a> (QWheelEvent *)</td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>The Counter Widget. </p>
<p>A Counter consists of a label displaying a number and one ore more (up to three) push buttons on each side of the label which can be used to increment or decrement the counter's value.</p>
<p>A Counter has a range from a minimum value to a maximum value and a step size. The range can be specified using QwtDblRange::setRange(). The counter's value is an integer multiple of the step size. The number of steps by which a button increments or decrements the value can be specified using <a class="el" href="class_qwt_counter.html#a6aa68e7fc717fb0e2e48a978301c96eb">QwtCounter::setIncSteps()</a>. The number of buttons can be changed with <a class="el" href="class_qwt_counter.html#ae9241fda2e375becdb484cc2cf7752f4" title="Specify the number of buttons on each side of the label.">QwtCounter::setNumButtons()</a>.</p>
<p>Holding the space bar down with focus on a button is the fastest method to step through the counter values. When the counter underflows/overflows, the focus is set to the smallest up/down button and counting is disabled. Counting is re-enabled on a button release event (mouse or space bar).</p>
<p>Example: </p>
<div class="fragment"><pre class="fragment"><span class="preprocessor">#include "../include/qwt_counter.h></span>
<a class="code" href="class_qwt_counter.html" title="The Counter Widget.">QwtCounter</a> *cnt;
cnt = <span class="keyword">new</span> <a class="code" href="class_qwt_counter.html#aee94cdbaf1f3d22e110fd3535dbca34a">QwtCounter</a>(parent, name);
cnt-><a class="code" href="class_qwt_double_range.html#a43891011664b74b8e5454763a3f5ff21" title="Specify range and step size.">setRange</a>(0.0, 100.0, 1.0); <span class="comment">// From 0.0 to 100, step 1.0</span>
cnt-><a class="code" href="class_qwt_counter.html#ae9241fda2e375becdb484cc2cf7752f4" title="Specify the number of buttons on each side of the label.">setNumButtons</a>(2); <span class="comment">// Two buttons each side</span>
cnt-><a class="code" href="class_qwt_counter.html#a6aa68e7fc717fb0e2e48a978301c96eb">setIncSteps</a>(QwtCounter::Button1, 1); <span class="comment">// Button 1 increments 1 step</span>
cnt-><a class="code" href="class_qwt_counter.html#a6aa68e7fc717fb0e2e48a978301c96eb">setIncSteps</a>(QwtCounter::Button2, 20); <span class="comment">// Button 2 increments 20 steps</span>
connect(cnt, SIGNAL(<a class="code" href="class_qwt_counter.html#add02928c348417fbfadd7095d058f331">valueChanged</a>(<span class="keywordtype">double</span>)), my_class, SLOT(newValue(<span class="keywordtype">double</span>)));
</pre></div> </div><hr/><h2>Member Enumeration Documentation</h2>
<a class="anchor" id="a027cfd91946ca9a19a1d606411e0f374"></a><!-- doxytag: member="QwtCounter::Button" ref="a027cfd91946ca9a19a1d606411e0f374" args="" -->
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<td class="memname">enum <a class="el" href="class_qwt_counter.html#a027cfd91946ca9a19a1d606411e0f374">QwtCounter::Button</a></td>
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<p>Button index </p>
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<hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="aee94cdbaf1f3d22e110fd3535dbca34a"></a><!-- doxytag: member="QwtCounter::QwtCounter" ref="aee94cdbaf1f3d22e110fd3535dbca34a" args="(QWidget *parent=NULL)" -->
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<td class="memname">QwtCounter::QwtCounter </td>
<td>(</td>
<td class="paramtype">QWidget * </td>
<td class="paramname"><em>parent</em> = <code>NULL</code></td><td>)</td>
<td><code> [explicit]</code></td>
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<p>The default number of buttons is set to 2. The default increments are: </p>
<ul>
<li>Button 1: 1 step </li>
<li>Button 2: 10 steps </li>
<li>Button 3: 100 steps</li>
</ul>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">parent</td><td></td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="a6469133eb210b470023a3dcc735aec4d"></a><!-- doxytag: member="QwtCounter::~QwtCounter" ref="a6469133eb210b470023a3dcc735aec4d" args="()" -->
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<td class="memname">QwtCounter::~QwtCounter </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [virtual]</code></td>
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<p>Destructor. </p>
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</div>
<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a694ed7277e137e44bccc5918b4c15ecc"></a><!-- doxytag: member="QwtCounter::buttonReleased" ref="a694ed7277e137e44bccc5918b4c15ecc" args="(double value)" -->
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<td class="memname">void QwtCounter::buttonReleased </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>value</em></td><td>)</td>
<td><code> [signal]</code></td>
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<p>This signal is emitted when a button has been released </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">value</td><td>The new value </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="a8817a2b253273d694b02a81feb76ef64"></a><!-- doxytag: member="QwtCounter::editable" ref="a8817a2b253273d694b02a81feb76ef64" args="() const " -->
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<td class="memname">bool QwtCounter::editable </td>
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<p>returns whether the line edit is edatble. (default is yes) </p>
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<a class="anchor" id="ad855f1cec9068fd73cce5e2e29fb5771"></a><!-- doxytag: member="QwtCounter::event" ref="ad855f1cec9068fd73cce5e2e29fb5771" args="(QEvent *)" -->
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<td class="memname">bool QwtCounter::event </td>
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<td class="paramtype">QEvent * </td>
<td class="paramname"><em>e</em></td><td>)</td>
<td><code> [protected, virtual]</code></td>
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<p>Handle PolishRequest events </p>
</div>
</div>
<a class="anchor" id="a595c04ed863eb7f0adaf94440087fe0a"></a><!-- doxytag: member="QwtCounter::exactPrevValue" ref="a595c04ed863eb7f0adaf94440087fe0a" args="() const " -->
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<td class="memname">double QwtDoubleRange::exactPrevValue </td>
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<td class="paramname"></td><td>)</td>
<td> const<code> [protected, inherited]</code></td>
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<p>Returns the exact previous value. </p>
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<p>Returns the exact value. </p>
<p>The exact value is the value which <a class="el" href="class_qwt_double_range.html#a7777cf257c812579c4891512f1b6cad0" title="Returns the current value.">QwtDoubleRange::value</a> would return if the value were not adjusted to the step raster. It differs from the current value only if <a class="el" href="class_qwt_double_range.html#a63bc8ea5e7ecd776b7d32d21db1ea668" title="Adjust the value to the closest point in the step raster.">QwtDoubleRange::fitValue</a> or <a class="el" href="class_qwt_double_range.html#a299c35c72e9b69f5a0e3dcd2b7da775b" title="Increment the value by a specified number of steps.">QwtDoubleRange::incValue</a> have been used before. This function is intended for internal use in derived classes. </p>
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<a class="anchor" id="a63bc8ea5e7ecd776b7d32d21db1ea668"></a><!-- doxytag: member="QwtCounter::fitValue" ref="a63bc8ea5e7ecd776b7d32d21db1ea668" args="(double)" -->
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<td class="memname">void QwtDoubleRange::fitValue </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>x</em></td><td>)</td>
<td><code> [virtual, inherited]</code></td>
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<p>Adjust the value to the closest point in the step raster. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">x</td><td>value </td></tr>
</table>
</dd>
</dl>
<dl class="warning"><dt><b>Warning:</b></dt><dd>The value is clipped when it lies outside the range. When the range is <a class="el" href="class_qwt_double_range.html#ad1efbcbf29dbc74f3f378292b76b007b" title="Returns true if the range is periodic.">QwtDoubleRange::periodic</a>, it will be mapped to a point in the interval such that <div class="fragment"><pre class="fragment">new value := x + n * (max. value - min. value)</pre></div> with an integer number n. </dd></dl>
<p>Reimplemented in <a class="el" href="class_qwt_abstract_slider.html#a50ed1e265beaa1c8adbe718caa023e50">QwtAbstractSlider</a>.</p>
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<a class="anchor" id="a19b85337d4ab0b5f0579b02e4fb29a8f"></a><!-- doxytag: member="QwtCounter::incPages" ref="a19b85337d4ab0b5f0579b02e4fb29a8f" args="(int)" -->
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<td class="memname">void QwtDoubleRange::incPages </td>
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<td class="paramtype">int </td>
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<p>Increment the value by a specified number of pages. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">nPages</td><td>Number of pages to increment. A negative number decrements the value. </td></tr>
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</dd>
</dl>
<dl class="warning"><dt><b>Warning:</b></dt><dd>The Page size is specified in the constructor. </dd></dl>
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<a class="anchor" id="a9c81b37e547358cc588311d941649de1"></a><!-- doxytag: member="QwtCounter::incSteps" ref="a9c81b37e547358cc588311d941649de1" args="(QwtCounter::Button btn) const " -->
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<td class="memname">int QwtCounter::incSteps </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_qwt_counter.html#a027cfd91946ca9a19a1d606411e0f374">QwtCounter::Button</a> </td>
<td class="paramname"><em>btn</em></td><td>)</td>
<td> const</td>
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<dl class="return"><dt><b>Returns:</b></dt><dd>the number of steps by which a specified button increments the value or 0 if the button is invalid. </dd></dl>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">btn</td><td>One of <code>QwtCounter::Button1</code>, <code>QwtCounter::Button2</code>, <code>QwtCounter::Button3</code> </td></tr>
</table>
</dd>
</dl>
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<a class="anchor" id="a299c35c72e9b69f5a0e3dcd2b7da775b"></a><!-- doxytag: member="QwtCounter::incValue" ref="a299c35c72e9b69f5a0e3dcd2b7da775b" args="(int)" -->
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<td class="memname">void QwtDoubleRange::incValue </td>
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<td class="paramtype">int </td>
<td class="paramname"><em>nSteps</em></td><td>)</td>
<td><code> [virtual, inherited]</code></td>
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<p>Increment the value by a specified number of steps. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">nSteps</td><td>Number of steps to increment </td></tr>
</table>
</dd>
</dl>
<dl class="warning"><dt><b>Warning:</b></dt><dd>As a result of this operation, the new value will always be adjusted to the step raster. </dd></dl>
<p>Reimplemented in <a class="el" href="class_qwt_abstract_slider.html#a5fccdb2ca370bba9ed4d29864fd80788">QwtAbstractSlider</a>.</p>
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<a class="anchor" id="afc4921deb3f68a64cc08b0654a040bc6"></a><!-- doxytag: member="QwtCounter::isValid" ref="afc4921deb3f68a64cc08b0654a040bc6" args="() const " -->
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<p>Indicates if the value is valid. </p>
<p>Reimplemented in <a class="el" href="class_qwt_abstract_slider.html#a87c750f098cb5f70306a7908339cb88e">QwtAbstractSlider</a>.</p>
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<td class="memname">void QwtCounter::keyPressEvent </td>
<td>(</td>
<td class="paramtype">QKeyEvent * </td>
<td class="paramname"><em>e</em></td><td>)</td>
<td><code> [protected, virtual]</code></td>
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<p>Handle key events</p>
<ul>
<li>Ctrl + Qt::Key_Home Step to <a class="el" href="class_qwt_double_range.html#a8b8650a6f8a96144d3af21207ee71637" title="Returns the value at the first border of the range.">minValue()</a></li>
<li>Ctrl + Qt::Key_End Step to <a class="el" href="class_qwt_double_range.html#a215275a1a8b4218a424ee8444c7fe409" title="Returns the value of the second border of the range.">maxValue()</a></li>
<li>Qt::Key_Up Increment by incSteps(QwtCounter::Button1)</li>
<li>Qt::Key_Down Decrement by incSteps(QwtCounter::Button1)</li>
<li>Qt::Key_PageUp Increment by incSteps(QwtCounter::Button2)</li>
<li>Qt::Key_PageDown Decrement by incSteps(QwtCounter::Button2)</li>
<li>Shift + Qt::Key_PageUp Increment by incSteps(QwtCounter::Button3)</li>
<li>Shift + Qt::Key_PageDown Decrement by incSteps(QwtCounter::Button3) </li>
</ul>
</div>
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<p>returns the maximum value of the range </p>
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<p>Returns the value of the second border of the range. </p>
<p>maxValue returns the value which has been specified as the second parameter in <a class="el" href="class_qwt_double_range.html#a43891011664b74b8e5454763a3f5ff21" title="Specify range and step size.">QwtDoubleRange::setRange</a>.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_double_range.html#a43891011664b74b8e5454763a3f5ff21" title="Specify range and step size.">setRange()</a> </dd></dl>
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<p>returns the minimum value of the range </p>
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<p>Returns the value at the first border of the range. </p>
<p>minValue returns the value which has been specified as the first parameter in <a class="el" href="class_qwt_double_range.html#a43891011664b74b8e5454763a3f5ff21" title="Specify range and step size.">setRange()</a>.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_double_range.html#a43891011664b74b8e5454763a3f5ff21" title="Specify range and step size.">setRange()</a> </dd></dl>
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<a class="anchor" id="ac160c5e7a1c7f858b7f52ff0904ea142"></a><!-- doxytag: member="QwtCounter::numButtons" ref="ac160c5e7a1c7f858b7f52ff0904ea142" args="() const " -->
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<td class="memname">int QwtCounter::numButtons </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<div class="memdoc">
<dl class="return"><dt><b>Returns:</b></dt><dd>The number of buttons on each side of the widget. </dd></dl>
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<a class="anchor" id="ac12a5c43dc5839913379982ec40a39d8"></a><!-- doxytag: member="QwtCounter::pageSize" ref="ac12a5c43dc5839913379982ec40a39d8" args="() const " -->
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<td class="memname">int QwtDoubleRange::pageSize </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const<code> [inherited]</code></td>
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<p>Returns the page size in steps. </p>
</div>
</div>
<a class="anchor" id="ad1efbcbf29dbc74f3f378292b76b007b"></a><!-- doxytag: member="QwtCounter::periodic" ref="ad1efbcbf29dbc74f3f378292b76b007b" args="() const " -->
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<td class="memname">bool QwtDoubleRange::periodic </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const<code> [inherited]</code></td>
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<p>Returns true if the range is periodic. </p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_double_range.html#a95fa6a4e44fc47726d939155bb6f6f1f" title="Make the range periodic.">setPeriodic()</a> </dd></dl>
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<a class="anchor" id="a19824b7542778b23372fb77fac75beb8"></a><!-- doxytag: member="QwtCounter::polish" ref="a19824b7542778b23372fb77fac75beb8" args="()" -->
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<td class="memname">void QwtCounter::polish </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [virtual]</code></td>
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</table>
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<p>Sets the minimum width for the buttons </p>
</div>
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<a class="anchor" id="a38768187bef94dd5e5a2c8664746b365"></a><!-- doxytag: member="QwtCounter::prevValue" ref="a38768187bef94dd5e5a2c8664746b365" args="() const " -->
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<td class="memname">double QwtDoubleRange::prevValue </td>
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<td class="paramname"></td><td>)</td>
<td> const<code> [protected, inherited]</code></td>
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<p>Returns the previous value. </p>
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<a class="anchor" id="a4fd4e750b1f5a852250e57778a3e4159"></a><!-- doxytag: member="QwtCounter::rangeChange" ref="a4fd4e750b1f5a852250e57778a3e4159" args="()" -->
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<td class="memname">void QwtCounter::rangeChange </td>
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<td class="paramname"></td><td>)</td>
<td><code> [protected, virtual]</code></td>
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<p>Notify change of range. </p>
<p>This function updates the enabled property of all buttons contained in <a class="el" href="class_qwt_counter.html" title="The Counter Widget.">QwtCounter</a>. </p>
<p>Reimplemented from <a class="el" href="class_qwt_double_range.html#a3583134a1ac32706aa4742088bb9d4dc">QwtDoubleRange</a>.</p>
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<a class="anchor" id="a2d2f4bf2813d2aa30c2fb9ec7a90163c"></a><!-- doxytag: member="QwtCounter::setEditable" ref="a2d2f4bf2813d2aa30c2fb9ec7a90163c" args="(bool)" -->
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<td class="memname">void QwtCounter::setEditable </td>
<td>(</td>
<td class="paramtype">bool </td>
<td class="paramname"><em>editable</em></td><td>)</td>
<td></td>
</tr>
</table>
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<p>Allow/disallow the user to manually edit the value. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">editable</td><td>true enables editing </td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_counter.html#a8817a2b253273d694b02a81feb76ef64" title="returns whether the line edit is edatble. (default is yes)">editable()</a> </dd></dl>
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<a class="anchor" id="a6aa68e7fc717fb0e2e48a978301c96eb"></a><!-- doxytag: member="QwtCounter::setIncSteps" ref="a6aa68e7fc717fb0e2e48a978301c96eb" args="(QwtCounter::Button btn, int nSteps)" -->
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<td class="memname">void QwtCounter::setIncSteps </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_qwt_counter.html#a027cfd91946ca9a19a1d606411e0f374">QwtCounter::Button</a> </td>
<td class="paramname"><em>btn</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>nSteps</em> </td>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>Specify the number of steps by which the value is incremented or decremented when a specified button is pushed.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">btn</td><td>One of <code>QwtCounter::Button1</code>, <code>QwtCounter::Button2</code>, <code>QwtCounter::Button3</code> </td></tr>
<tr><td class="paramname">nSteps</td><td>Number of steps </td></tr>
</table>
</dd>
</dl>
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<a class="anchor" id="afd1de4657645bd41a8ccdaa21a7dc591"></a><!-- doxytag: member="QwtCounter::setMaxValue" ref="afd1de4657645bd41a8ccdaa21a7dc591" args="(double m)" -->
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<td class="memname">void QwtCounter::setMaxValue </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>value</em></td><td>)</td>
<td></td>
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<p>Set the maximum value of the range</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">value</td><td>Maximum value </td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_counter.html#a8c1b902c0805f3581568b4d700e79221">setMinValue()</a>, <a class="el" href="class_qwt_counter.html#acf0edc717951ef75d94789b68cd073e6" title="returns the maximum value of the range">maxVal()</a> </dd></dl>
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<a class="anchor" id="a8c1b902c0805f3581568b4d700e79221"></a><!-- doxytag: member="QwtCounter::setMinValue" ref="a8c1b902c0805f3581568b4d700e79221" args="(double m)" -->
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<td class="memname">void QwtCounter::setMinValue </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>value</em></td><td>)</td>
<td></td>
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<p>Set the minimum value of the range</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">value</td><td>Minimum value </td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_counter.html#afd1de4657645bd41a8ccdaa21a7dc591">setMaxValue()</a>, <a class="el" href="class_qwt_counter.html#a491c846d83a5b7e6de27bc98de70279e" title="returns the minimum value of the range">minVal()</a> </dd></dl>
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<a class="anchor" id="ae9241fda2e375becdb484cc2cf7752f4"></a><!-- doxytag: member="QwtCounter::setNumButtons" ref="ae9241fda2e375becdb484cc2cf7752f4" args="(int n)" -->
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<td class="memname">void QwtCounter::setNumButtons </td>
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<td class="paramname"><em>n</em></td><td>)</td>
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<p>Specify the number of buttons on each side of the label. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">n</td><td>Number of buttons </td></tr>
</table>
</dd>
</dl>
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<a class="anchor" id="a95fa6a4e44fc47726d939155bb6f6f1f"></a><!-- doxytag: member="QwtCounter::setPeriodic" ref="a95fa6a4e44fc47726d939155bb6f6f1f" args="(bool tf)" -->
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<td class="memname">void QwtDoubleRange::setPeriodic </td>
<td>(</td>
<td class="paramtype">bool </td>
<td class="paramname"><em>tf</em></td><td>)</td>
<td><code> [inherited]</code></td>
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<p>Make the range periodic. </p>
<p>When the range is periodic, the value will be set to a point inside the interval such that</p>
<div class="fragment"><pre class="fragment">point = value + n * width </pre></div><p>if the user tries to set a new value which is outside the range. If the range is nonperiodic (the default), values outside the range will be clipped.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">tf</td><td>true for a periodic range </td></tr>
</table>
</dd>
</dl>
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<a class="anchor" id="a43891011664b74b8e5454763a3f5ff21"></a><!-- doxytag: member="QwtCounter::setRange" ref="a43891011664b74b8e5454763a3f5ff21" args="(double vmin, double vmax, double vstep=0.0, int pagesize=1)" -->
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<td class="memname">void QwtDoubleRange::setRange </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>vmin</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>vmax</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>vstep</em> = <code>0.0</code>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>pageSize</em> = <code>1</code> </td>
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<td></td>
<td>)</td>
<td></td><td><code> [inherited]</code></td>
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<p>Specify range and step size. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">vmin</td><td>lower boundary of the interval </td></tr>
<tr><td class="paramname">vmax</td><td>higher boundary of the interval </td></tr>
<tr><td class="paramname">vstep</td><td>step width </td></tr>
<tr><td class="paramname">pageSize</td><td>page size in steps </td></tr>
</table>
</dd>
</dl>
<dl class="warning"><dt><b>Warning:</b></dt><dd><ul>
<li>A change of the range changes the value if it lies outside the new range. The current value will *not* be adjusted to the new step raster. </li>
<li>vmax < vmin is allowed. </li>
<li>If the step size is left out or set to zero, it will be set to 1/100 of the interval length. </li>
<li>If the step size has an absurd value, it will be corrected to a better one. </li>
</ul>
</dd></dl>
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<a class="anchor" id="ab885e97d0071877dfefb73feb0adc0cd"></a><!-- doxytag: member="QwtCounter::setStep" ref="ab885e97d0071877dfefb73feb0adc0cd" args="(double s)" -->
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<td class="memname">void QwtCounter::setStep </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>stepSize</em></td><td>)</td>
<td></td>
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<p>Set the step size </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">stepSize</td><td>Step size </td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_double_range.html#a29ed5fc66439def424a8ad773eea285d" title="Change the step raster.">QwtDoubleRange::setStep()</a> </dd></dl>
<p>Reimplemented from <a class="el" href="class_qwt_double_range.html#a29ed5fc66439def424a8ad773eea285d">QwtDoubleRange</a>.</p>
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<a class="anchor" id="ae56a556a72955b6d10419f2c41779383"></a><!-- doxytag: member="QwtCounter::setStepButton1" ref="ae56a556a72955b6d10419f2c41779383" args="(int nSteps)" -->
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<td class="memname">void QwtCounter::setStepButton1 </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>nSteps</em></td><td>)</td>
<td></td>
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<p>Set the number of increment steps for button 1 </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">nSteps</td><td>Number of steps </td></tr>
</table>
</dd>
</dl>
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<a class="anchor" id="a0d764a96706593d8c8b51338e92abfcc"></a><!-- doxytag: member="QwtCounter::setStepButton2" ref="a0d764a96706593d8c8b51338e92abfcc" args="(int nSteps)" -->
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<td class="memname">void QwtCounter::setStepButton2 </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>nSteps</em></td><td>)</td>
<td></td>
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<p>Set the number of increment steps for button 2 </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">nSteps</td><td>Number of steps </td></tr>
</table>
</dd>
</dl>
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<a class="anchor" id="a8b55539578de083793b8310cb8909294"></a><!-- doxytag: member="QwtCounter::setStepButton3" ref="a8b55539578de083793b8310cb8909294" args="(int nSteps)" -->
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<td class="memname">void QwtCounter::setStepButton3 </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>nSteps</em></td><td>)</td>
<td></td>
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<p>Set the number of increment steps for button 3 </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">nSteps</td><td>Number of steps </td></tr>
</table>
</dd>
</dl>
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<a class="anchor" id="a50a9c386663e170016a74cf8ee28ab8f"></a><!-- doxytag: member="QwtCounter::setValid" ref="a50a9c386663e170016a74cf8ee28ab8f" args="(bool)" -->
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<td class="memname">void QwtDoubleRange::setValid </td>
<td>(</td>
<td class="paramtype">bool </td>
<td class="paramname"><em>isValid</em></td><td>)</td>
<td><code> [inherited]</code></td>
</tr>
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<p>Set the value to be valid/invalid. </p>
<p>Reimplemented in <a class="el" href="class_qwt_abstract_slider.html#a79d99f14ebd47dfede8135845c90cedb">QwtAbstractSlider</a>.</p>
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<a class="anchor" id="a429a2e986aa46c1231643df5d4c78970"></a><!-- doxytag: member="QwtCounter::setValue" ref="a429a2e986aa46c1231643df5d4c78970" args="(double)" -->
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<td class="memname">void QwtCounter::setValue </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>v</em></td><td>)</td>
<td><code> [virtual]</code></td>
</tr>
</table>
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<p>Set a new value. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">v</td><td>new value Calls <a class="el" href="class_qwt_double_range.html#af6a3aa74c970a2bef29f0c1af99720e8" title="Set a new value without adjusting to the step raster.">QwtDoubleRange::setValue</a> and does all visual updates. </td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_double_range.html#af6a3aa74c970a2bef29f0c1af99720e8" title="Set a new value without adjusting to the step raster.">QwtDoubleRange::setValue()</a> </dd></dl>
<p>Reimplemented from <a class="el" href="class_qwt_double_range.html#af6a3aa74c970a2bef29f0c1af99720e8">QwtDoubleRange</a>.</p>
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<a class="anchor" id="a9ccdfd602ccd5ecd8595172cd22b2b27"></a><!-- doxytag: member="QwtCounter::sizeHint" ref="a9ccdfd602ccd5ecd8595172cd22b2b27" args="() const " -->
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<td class="memname">QSize QwtCounter::sizeHint </td>
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<td class="paramname"></td><td>)</td>
<td> const<code> [virtual]</code></td>
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<p>A size hint. </p>
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<a class="anchor" id="ab3496bdd6bdb093462bca588880d8c1b"></a><!-- doxytag: member="QwtCounter::step" ref="ab3496bdd6bdb093462bca588880d8c1b" args="() const " -->
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<td class="memname">double QwtCounter::step </td>
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<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>returns the step size </p>
<p>Reimplemented from <a class="el" href="class_qwt_double_range.html#a0cb8cc60548c10cb1d98e54387961967">QwtDoubleRange</a>.</p>
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<a class="anchor" id="a8e0b28f111c45b3a2241fd8889bc8bce"></a><!-- doxytag: member="QwtCounter::stepButton1" ref="a8e0b28f111c45b3a2241fd8889bc8bce" args="() const " -->
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<td class="memname">int QwtCounter::stepButton1 </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>returns the number of increment steps for button 1 </p>
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<a class="anchor" id="a7d99de95e1c05e4994413e6d8cd641fe"></a><!-- doxytag: member="QwtCounter::stepButton2" ref="a7d99de95e1c05e4994413e6d8cd641fe" args="() const " -->
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<td class="memname">int QwtCounter::stepButton2 </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
</tr>
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<p>returns the number of increment steps for button 2 </p>
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<a class="anchor" id="abc6eb2073cc7d7b5f1d7e4c6c7b205c9"></a><!-- doxytag: member="QwtCounter::stepButton3" ref="abc6eb2073cc7d7b5f1d7e4c6c7b205c9" args="() const " -->
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<td class="memname">int QwtCounter::stepButton3 </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
</tr>
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<p>returns the number of increment steps for button 3 </p>
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<a class="anchor" id="a86641f8755ed172ca4cf72d36df539ca"></a><!-- doxytag: member="QwtCounter::stepChange" ref="a86641f8755ed172ca4cf72d36df539ca" args="()" -->
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<td class="memname">void QwtDoubleRange::stepChange </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [protected, virtual, inherited]</code></td>
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<p>Notify a change of the step size. </p>
<p>This virtual function is called whenever the step size changes. The default implementation does nothing. </p>
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<a class="anchor" id="a121194fadd8cea929c1ac9509f27fe58"></a><!-- doxytag: member="QwtCounter::value" ref="a121194fadd8cea929c1ac9509f27fe58" args="() const " -->
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<td class="memname">double QwtCounter::value </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const<code> [virtual]</code></td>
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<dl class="return"><dt><b>Returns:</b></dt><dd>Current value </dd></dl>
<p>Reimplemented from <a class="el" href="class_qwt_double_range.html#a7777cf257c812579c4891512f1b6cad0">QwtDoubleRange</a>.</p>
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<a class="anchor" id="add02928c348417fbfadd7095d058f331"></a><!-- doxytag: member="QwtCounter::valueChanged" ref="add02928c348417fbfadd7095d058f331" args="(double value)" -->
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<td class="memname">void QwtCounter::valueChanged </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>value</em></td><td>)</td>
<td><code> [signal]</code></td>
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<p>This signal is emitted when the counter's value has changed </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">value</td><td>The new value </td></tr>
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<a class="anchor" id="acdada1ba1d5873b9c8b3f75d63b4685a"></a><!-- doxytag: member="QwtCounter::wheelEvent" ref="acdada1ba1d5873b9c8b3f75d63b4685a" args="(QWheelEvent *)" -->
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<td class="memname">void QwtCounter::wheelEvent </td>
<td>(</td>
<td class="paramtype">QWheelEvent * </td>
<td class="paramname"><em>e</em></td><td>)</td>
<td><code> [protected, virtual]</code></td>
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<p>Handle wheel events </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">e</td><td>Wheel event </td></tr>
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</dd>
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