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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
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| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/qdial.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
Add Qt3 development HEAD version
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| -rw-r--r-- | doc/html/qdial.html | 352 |
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diff --git a/doc/html/qdial.html b/doc/html/qdial.html new file mode 100644 index 0000000..e826027 --- /dev/null +++ b/doc/html/qdial.html @@ -0,0 +1,352 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/widgets/qdial.cpp:86 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>QDial Class</title> +<style type="text/css"><!-- +fn { margin-left: 1cm; text-indent: -1cm; } +a:link { color: #004faf; text-decoration: none } +a:visited { color: #672967; text-decoration: none } +body { background: #ffffff; color: black; } +--></style> +</head> +<body> + +<table border="0" cellpadding="0" cellspacing="0" width="100%"> +<tr bgcolor="#E5E5E5"> +<td valign=center> + <a href="index.html"> +<font color="#004faf">Home</font></a> + | <a href="classes.html"> +<font color="#004faf">All Classes</font></a> + | <a href="mainclasses.html"> +<font color="#004faf">Main Classes</font></a> + | <a href="annotated.html"> +<font color="#004faf">Annotated</font></a> + | <a href="groups.html"> +<font color="#004faf">Grouped Classes</font></a> + | <a href="functions.html"> +<font color="#004faf">Functions</font></a> +</td> +<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QDial Class Reference</h1> + +<p>The QDial class provides a rounded range control (like a speedometer or potentiometer). +<a href="#details">More...</a> +<p><tt>#include <<a href="qdial-h.html">qdial.h</a>></tt> +<p>Inherits <a href="qwidget.html">QWidget</a> and <a href="qrangecontrol.html">QRangeControl</a>. +<p><a href="qdial-members.html">List of all member functions.</a> +<h2>Public Members</h2> +<ul> +<li class=fn><a href="#QDial"><b>QDial</b></a> ( QWidget * parent = 0, const char * name = 0, WFlags f = 0 )</li> +<li class=fn><a href="#QDial-2"><b>QDial</b></a> ( int minValue, int maxValue, int pageStep, int value, QWidget * parent = 0, const char * name = 0 )</li> +<li class=fn><a href="#~QDial"><b>~QDial</b></a> ()</li> +<li class=fn>bool <a href="#tracking"><b>tracking</b></a> () const</li> +<li class=fn>bool <a href="#wrapping"><b>wrapping</b></a> () const</li> +<li class=fn>int <a href="#notchSize"><b>notchSize</b></a> () const</li> +<li class=fn>virtual void <a href="#setNotchTarget"><b>setNotchTarget</b></a> ( double )</li> +<li class=fn>double <a href="#notchTarget"><b>notchTarget</b></a> () const</li> +<li class=fn>bool <a href="#notchesVisible"><b>notchesVisible</b></a> () const</li> +<li class=fn>int <a href="#minValue"><b>minValue</b></a> () const</li> +<li class=fn>int <a href="#maxValue"><b>maxValue</b></a> () const</li> +<li class=fn>void <a href="#setMinValue"><b>setMinValue</b></a> ( int )</li> +<li class=fn>void <a href="#setMaxValue"><b>setMaxValue</b></a> ( int )</li> +<li class=fn>int <a href="#lineStep"><b>lineStep</b></a> () const</li> +<li class=fn>int <a href="#pageStep"><b>pageStep</b></a> () const</li> +<li class=fn>void <a href="#setLineStep"><b>setLineStep</b></a> ( int )</li> +<li class=fn>void <a href="#setPageStep"><b>setPageStep</b></a> ( int )</li> +<li class=fn>int <a href="#value"><b>value</b></a> () const</li> +</ul> +<h2>Public Slots</h2> +<ul> +<li class=fn>virtual void <a href="#setValue"><b>setValue</b></a> ( int )</li> +<li class=fn>void <a href="#addLine"><b>addLine</b></a> ()</li> +<li class=fn>void <a href="#subtractLine"><b>subtractLine</b></a> ()</li> +<li class=fn>void <a href="#addPage"><b>addPage</b></a> ()</li> +<li class=fn>void <a href="#subtractPage"><b>subtractPage</b></a> ()</li> +<li class=fn>virtual void <a href="#setNotchesVisible"><b>setNotchesVisible</b></a> ( bool b )</li> +<li class=fn>virtual void <a href="#setWrapping"><b>setWrapping</b></a> ( bool on )</li> +<li class=fn>virtual void <a href="#setTracking"><b>setTracking</b></a> ( bool enable )</li> +</ul> +<h2>Signals</h2> +<ul> +<li class=fn>void <a href="#valueChanged"><b>valueChanged</b></a> ( int value )</li> +<li class=fn>void <a href="#dialPressed"><b>dialPressed</b></a> ()</li> +<li class=fn>void <a href="#dialMoved"><b>dialMoved</b></a> ( int value )</li> +<li class=fn>void <a href="#dialReleased"><b>dialReleased</b></a> ()</li> +</ul> +<h2>Properties</h2> +<ul> +<li class=fn>int <a href="#lineStep-prop"><b>lineStep</b></a> - the current line step</li> +<li class=fn>int <a href="#maxValue-prop"><b>maxValue</b></a> - the current maximum value</li> +<li class=fn>int <a href="#minValue-prop"><b>minValue</b></a> - the current minimum value</li> +<li class=fn>int <a href="#notchSize-prop"><b>notchSize</b></a> - the current notch size <em>(read only)</em></li> +<li class=fn>double <a href="#notchTarget-prop"><b>notchTarget</b></a> - the target number of pixels between notches</li> +<li class=fn>bool <a href="#notchesVisible-prop"><b>notchesVisible</b></a> - whether the notches are shown</li> +<li class=fn>int <a href="#pageStep-prop"><b>pageStep</b></a> - the current page step</li> +<li class=fn>bool <a href="#tracking-prop"><b>tracking</b></a> - whether tracking is enabled</li> +<li class=fn>int <a href="#value-prop"><b>value</b></a> - the current dial value</li> +<li class=fn>bool <a href="#wrapping-prop"><b>wrapping</b></a> - whether wrapping is enabled</li> +</ul> +<h2>Protected Members</h2> +<ul> +<li class=fn>virtual void <a href="#valueChange"><b>valueChange</b></a> ()</li> +<li class=fn>virtual void <a href="#rangeChange"><b>rangeChange</b></a> ()</li> +<li class=fn>virtual void <a href="#repaintScreen"><b>repaintScreen</b></a> ( const QRect * cr = 0 )</li> +</ul> +<hr><a name="details"></a><h2>Detailed Description</h2> + + +<p> The QDial class provides a rounded range control (like a speedometer or potentiometer). +<p> + +<p> QDial is used when the user needs to control a value within a +program-definable range, and the range either wraps around +(typically, 0..359 degrees) or the dialog layout needs a square +widget. +<p> Both API- and UI-wise, the dial is very similar to a <a href="qslider.html">slider.</a> Indeed, when <a href="#wrapping">wrapping</a>() is FALSE (the default) +there is no real difference between a slider and a dial. They +have the same signals, slots and member functions, all of which do +the same things. Which one you use depends only on your taste +and on the application. +<p> The dial initially emits <a href="#valueChanged">valueChanged</a>() signals continuously while +the slider is being moved; you can make it emit the signal less +often by calling <a href="#setTracking">setTracking</a>(FALSE). <a href="#dialMoved">dialMoved</a>() is emitted +continuously even when <a href="#tracking">tracking</a>() is FALSE. +<p> The slider also emits <a href="#dialPressed">dialPressed</a>() and <a href="#dialReleased">dialReleased</a>() signals +when the mouse button is pressed and released. But note that the +dial's value can change without these signals being emitted; the +keyboard and wheel can be used to change the value. +<p> Unlike the slider, QDial attempts to draw a "nice" number of +notches rather than one per <a href="#lineStep">lineStep</a>(). If possible, the number +of notches drawn is one per lineStep(), but if there aren't enough +pixels to draw every one, QDial will draw every second, third +etc., notch. <a href="#notchSize">notchSize</a>() returns the number of units per notch, +hopefully a multiple of lineStep(); <a href="#setNotchTarget">setNotchTarget</a>() sets the +target distance between neighbouring notches in pixels. The +default is 3.75 pixels. +<p> Like the slider, the dial makes the <a href="qrangecontrol.html">QRangeControl</a> functions +<a href="#setValue">setValue</a>(), <a href="#addLine">addLine</a>(), <a href="#subtractLine">subtractLine</a>(), <a href="#addPage">addPage</a>() and +<a href="#subtractPage">subtractPage</a>() available as slots. +<p> The dial's keyboard interface is fairly simple: The left/up and +right/down arrow keys move by lineStep(), page up and page down by +<a href="#pageStep">pageStep</a>() and Home and End to <a href="#minValue">minValue</a>() and <a href="#maxValue">maxValue</a>(). +<p> <img src=qdial-m.png> <img src=qdial-w.png> +<p> <p>See also <a href="qscrollbar.html">QScrollBar</a>, <a href="qspinbox.html">QSpinBox</a>, <a href="guibooks.html#fowler">GUI Design Handbook: Slider</a>, and <a href="basic.html">Basic Widgets</a>. + +<hr><h2>Member Function Documentation</h2> +<h3 class=fn><a name="QDial"></a>QDial::QDial ( <a href="qwidget.html">QWidget</a> * parent = 0, const char * name = 0, WFlags f = 0 ) +</h3> +Constructs a dial called <em>name</em> with parent <em>parent</em>. <em>f</em> is +propagated to the <a href="qwidget.html">QWidget</a> constructor. It has the default range of +a <a href="qrangecontrol.html">QRangeControl</a>. + +<h3 class=fn><a name="QDial-2"></a>QDial::QDial ( int minValue, int maxValue, int pageStep, int value, <a href="qwidget.html">QWidget</a> * parent = 0, const char * name = 0 ) +</h3> +Constructs a dial called <em>name</em> with parent <em>parent</em>. The dial's +value can never be smaller than <em>minValue</em> or greater than <em>maxValue</em>. Its page step size is <em>pageStep</em>, and its initial value +is <em>value</em>. +<p> <em>value</em> is forced to be within the legal range. + +<h3 class=fn><a name="~QDial"></a>QDial::~QDial () +</h3> +Destroys the dial. + +<h3 class=fn>void <a name="addLine"></a>QDial::addLine ()<tt> [slot]</tt> +</h3> +Increments the dial's <a href="#value">value</a>() by one <a href="#lineStep">lineStep</a>(). + +<h3 class=fn>void <a name="addPage"></a>QDial::addPage ()<tt> [slot]</tt> +</h3> +Increments the dial's <a href="#value">value</a>() by one <a href="#pageStep">pageStep</a>() of steps. + +<h3 class=fn>void <a name="dialMoved"></a>QDial::dialMoved ( int value )<tt> [signal]</tt> +</h3> + +<p> This signal is emitted whenever the dial <em>value</em> changes. The +frequency of this signal is <em>not</em> influenced by <a href="#setTracking">setTracking</a>(). +<p> <p>See also <a href="#valueChanged">valueChanged</a>(). + +<h3 class=fn>void <a name="dialPressed"></a>QDial::dialPressed ()<tt> [signal]</tt> +</h3> + +<p> This signal is emitted when the user begins mouse interaction with +the dial. +<p> <p>See also <a href="#dialReleased">dialReleased</a>(). + +<h3 class=fn>void <a name="dialReleased"></a>QDial::dialReleased ()<tt> [signal]</tt> +</h3> + +<p> This signal is emitted when the user ends mouse interaction with +the dial. +<p> <p>See also <a href="#dialPressed">dialPressed</a>(). + +<h3 class=fn>int <a name="lineStep"></a>QDial::lineStep () const +</h3><p>Returns the current line step. +See the <a href="qdial.html#lineStep-prop">"lineStep"</a> property for details. +<h3 class=fn>int <a name="maxValue"></a>QDial::maxValue () const +</h3><p>Returns the current maximum value. +See the <a href="qdial.html#maxValue-prop">"maxValue"</a> property for details. +<h3 class=fn>int <a name="minValue"></a>QDial::minValue () const +</h3><p>Returns the current minimum value. +See the <a href="qdial.html#minValue-prop">"minValue"</a> property for details. +<h3 class=fn>int <a name="notchSize"></a>QDial::notchSize () const +</h3><p>Returns the current notch size. +See the <a href="qdial.html#notchSize-prop">"notchSize"</a> property for details. +<h3 class=fn>double <a name="notchTarget"></a>QDial::notchTarget () const +</h3><p>Returns the target number of pixels between notches. +See the <a href="qdial.html#notchTarget-prop">"notchTarget"</a> property for details. +<h3 class=fn>bool <a name="notchesVisible"></a>QDial::notchesVisible () const +</h3><p>Returns TRUE if the notches are shown; otherwise returns FALSE. +See the <a href="qdial.html#notchesVisible-prop">"notchesVisible"</a> property for details. +<h3 class=fn>int <a name="pageStep"></a>QDial::pageStep () const +</h3><p>Returns the current page step. +See the <a href="qdial.html#pageStep-prop">"pageStep"</a> property for details. +<h3 class=fn>void <a name="rangeChange"></a>QDial::rangeChange ()<tt> [virtual protected]</tt> +</h3> +Reimplemented to ensure tick-marks are consistent with the new range. + +<p>Reimplemented from <a href="qrangecontrol.html#rangeChange">QRangeControl</a>. +<h3 class=fn>void <a name="repaintScreen"></a>QDial::repaintScreen ( const <a href="qrect.html">QRect</a> * cr = 0 )<tt> [virtual protected]</tt> +</h3> +Paints the dial using clip region <em>cr</em>. + +<h3 class=fn>void <a name="setLineStep"></a>QDial::setLineStep ( int ) +</h3><p>Sets the current line step. +See the <a href="qdial.html#lineStep-prop">"lineStep"</a> property for details. +<h3 class=fn>void <a name="setMaxValue"></a>QDial::setMaxValue ( int ) +</h3><p>Sets the current maximum value. +See the <a href="qdial.html#maxValue-prop">"maxValue"</a> property for details. +<h3 class=fn>void <a name="setMinValue"></a>QDial::setMinValue ( int ) +</h3><p>Sets the current minimum value. +See the <a href="qdial.html#minValue-prop">"minValue"</a> property for details. +<h3 class=fn>void <a name="setNotchTarget"></a>QDial::setNotchTarget ( double )<tt> [virtual]</tt> +</h3><p>Sets the target number of pixels between notches. +See the <a href="qdial.html#notchTarget-prop">"notchTarget"</a> property for details. +<h3 class=fn>void <a name="setNotchesVisible"></a>QDial::setNotchesVisible ( bool b )<tt> [virtual slot]</tt> +</h3><p>Sets whether the notches are shown to <em>b</em>. +See the <a href="qdial.html#notchesVisible-prop">"notchesVisible"</a> property for details. +<h3 class=fn>void <a name="setPageStep"></a>QDial::setPageStep ( int ) +</h3><p>Sets the current page step. +See the <a href="qdial.html#pageStep-prop">"pageStep"</a> property for details. +<h3 class=fn>void <a name="setTracking"></a>QDial::setTracking ( bool enable )<tt> [virtual slot]</tt> +</h3><p>Sets whether tracking is enabled to <em>enable</em>. +See the <a href="qdial.html#tracking-prop">"tracking"</a> property for details. +<h3 class=fn>void <a name="setValue"></a>QDial::setValue ( int )<tt> [virtual slot]</tt> +</h3><p>Sets the current dial value. +See the <a href="qdial.html#value-prop">"value"</a> property for details. +<h3 class=fn>void <a name="setWrapping"></a>QDial::setWrapping ( bool on )<tt> [virtual slot]</tt> +</h3><p>Sets whether wrapping is enabled to <em>on</em>. +See the <a href="qdial.html#wrapping-prop">"wrapping"</a> property for details. +<h3 class=fn>void <a name="subtractLine"></a>QDial::subtractLine ()<tt> [slot]</tt> +</h3> +Decrements the dial's <a href="#value">value</a>() by one <a href="#lineStep">lineStep</a>(). + +<h3 class=fn>void <a name="subtractPage"></a>QDial::subtractPage ()<tt> [slot]</tt> +</h3> +Decrements the dial's <a href="#value">value</a>() by one <a href="#pageStep">pageStep</a>() of steps. + +<h3 class=fn>bool <a name="tracking"></a>QDial::tracking () const +</h3><p>Returns TRUE if tracking is enabled; otherwise returns FALSE. +See the <a href="qdial.html#tracking-prop">"tracking"</a> property for details. +<h3 class=fn>int <a name="value"></a>QDial::value () const +</h3><p>Returns the current dial value. +See the <a href="qdial.html#value-prop">"value"</a> property for details. +<h3 class=fn>void <a name="valueChange"></a>QDial::valueChange ()<tt> [virtual protected]</tt> +</h3> +Reimplemented to ensure the display is correct and to emit the +<a href="#valueChanged">valueChanged</a>(int) signal when appropriate. + +<p>Reimplemented from <a href="qrangecontrol.html#valueChange">QRangeControl</a>. +<h3 class=fn>void <a name="valueChanged"></a>QDial::valueChanged ( int value )<tt> [signal]</tt> +</h3> + +<p> This signal is emitted whenever the dial's <em>value</em> changes. The +frequency of this signal is influenced by <a href="#setTracking">setTracking</a>(). + +<h3 class=fn>bool <a name="wrapping"></a>QDial::wrapping () const +</h3><p>Returns TRUE if wrapping is enabled; otherwise returns FALSE. +See the <a href="qdial.html#wrapping-prop">"wrapping"</a> property for details. +<hr><h2>Property Documentation</h2> +<h3 class=fn>int <a name="lineStep-prop"></a>lineStep</h3> +<p>This property holds the current line step. +<p>setLineStep() calls the virtual <a href="qrangecontrol.html#stepChange">stepChange</a>() function if the new +line step is different from the previous setting. +<p> <p>See also <a href="qrangecontrol.html#setSteps">QRangeControl::setSteps</a>(), <a href="#pageStep-prop">pageStep</a>, and <a href="qrangecontrol.html#setRange">setRange</a>(). + +<p>Set this property's value with <a href="#setLineStep">setLineStep</a>() and get this property's value with <a href="#lineStep">lineStep</a>(). +<h3 class=fn>int <a name="maxValue-prop"></a>maxValue</h3> +<p>This property holds the current maximum value. +<p>When setting this property, the <a href="#minValue-prop">QDial::minValue</a> is adjusted if +necessary to ensure that the range remains valid. +<p> <p>See also <a href="qrangecontrol.html#setRange">setRange</a>(). + +<p>Set this property's value with <a href="#setMaxValue">setMaxValue</a>() and get this property's value with <a href="#maxValue">maxValue</a>(). +<h3 class=fn>int <a name="minValue-prop"></a>minValue</h3> +<p>This property holds the current minimum value. +<p>When setting this property, the <a href="#maxValue-prop">QDial::maxValue</a> is adjusted if +necessary to ensure that the range remains valid. +<p> <p>See also <a href="qrangecontrol.html#setRange">setRange</a>(). + +<p>Set this property's value with <a href="#setMinValue">setMinValue</a>() and get this property's value with <a href="#minValue">minValue</a>(). +<h3 class=fn>int <a name="notchSize-prop"></a>notchSize</h3> +<p>This property holds the current notch size. +<p>The notch size is in range control units, not pixels, and if +possible it is a multiple of <a href="#lineStep">lineStep</a>() that results in an +on-screen notch size near <a href="#notchTarget">notchTarget</a>(). +<p> <p>See also <a href="#notchTarget-prop">notchTarget</a> and <a href="#lineStep-prop">lineStep</a>. + +<p>Get this property's value with <a href="#notchSize">notchSize</a>(). +<h3 class=fn>double <a name="notchTarget-prop"></a>notchTarget</h3> +<p>This property holds the target number of pixels between notches. +<p>The notch target is the number of pixels QDial attempts to put +between each notch. +<p> The actual size may differ from the target size. + +<p>Set this property's value with <a href="#setNotchTarget">setNotchTarget</a>() and get this property's value with <a href="#notchTarget">notchTarget</a>(). +<h3 class=fn>bool <a name="notchesVisible-prop"></a>notchesVisible</h3> +<p>This property holds whether the notches are shown. +<p>If TRUE, the notches are shown. If FALSE (the default) notches are +not shown. + +<p>Set this property's value with <a href="#setNotchesVisible">setNotchesVisible</a>() and get this property's value with <a href="#notchesVisible">notchesVisible</a>(). +<h3 class=fn>int <a name="pageStep-prop"></a>pageStep</h3> +<p>This property holds the current page step. +<p>setPageStep() calls the virtual <a href="qrangecontrol.html#stepChange">stepChange</a>() function if the new +page step is different from the previous setting. +<p> <p>See also <a href="qrangecontrol.html#stepChange">stepChange</a>(). + +<p>Set this property's value with <a href="#setPageStep">setPageStep</a>() and get this property's value with <a href="#pageStep">pageStep</a>(). +<h3 class=fn>bool <a name="tracking-prop"></a>tracking</h3> +<p>This property holds whether tracking is enabled. +<p>If TRUE (the default), tracking is enabled. This means that the +arrow can be moved using the mouse; otherwise the arrow cannot be +moved with the mouse. + +<p>Set this property's value with <a href="#setTracking">setTracking</a>() and get this property's value with <a href="#tracking">tracking</a>(). +<h3 class=fn>int <a name="value-prop"></a>value</h3> +<p>This property holds the current dial value. +<p>This is guaranteed to be within the range +<a href="#minValue-prop">QDial::minValue</a>..<a href="#maxValue-prop">QDial::maxValue</a>. +<p> <p>See also <a href="#minValue-prop">minValue</a> and <a href="#maxValue-prop">maxValue</a>. + +<p>Set this property's value with <a href="#setValue">setValue</a>() and get this property's value with <a href="#value">value</a>(). +<h3 class=fn>bool <a name="wrapping-prop"></a>wrapping</h3> +<p>This property holds whether wrapping is enabled. +<p>If TRUE, wrapping is enabled. This means that the arrow can be +turned around 360°. Otherwise there is some space at the bottom of +the dial which is skipped by the arrow. +<p> This property's default is FALSE. + +<p>Set this property's value with <a href="#setWrapping">setWrapping</a>() and get this property's value with <a href="#wrapping">wrapping</a>(). +<!-- eof --> +<hr><p> +This file is part of the <a href="index.html">Qt toolkit</a>. +Copyright © 1995-2007 +<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center> +<table width=100% cellspacing=0 border=0><tr> +<td>Copyright © 2007 +<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> +<td align=right><div align=right>Qt 3.3.8</div> +</table></div></address></body> +</html> |