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369 lines
23 KiB
369 lines
23 KiB
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/widgets/qslider.cpp:61 -->
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<title>TQSlider Class</title>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQSlider Class Reference</h1>
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<p>The TQSlider widget provides a vertical or horizontal slider.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qslider-h.html">ntqslider.h</a>></tt>
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<p>Inherits <a href="ntqwidget.html">TQWidget</a> and <a href="ntqrangecontrol.html">TQRangeControl</a>.
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<p><a href="qslider-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn>enum <a href="#TickSetting-enum"><b>TickSetting</b></a> { NoMarks = 0, Above = 1, Left = Above, Below = 2, Right = Below, Both = 3 }</li>
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<li class=fn><a href="#TQSlider"><b>TQSlider</b></a> ( TQWidget * parent, const char * name = 0 )</li>
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<li class=fn><a href="#TQSlider-2"><b>TQSlider</b></a> ( Orientation orientation, TQWidget * parent, const char * name = 0 )</li>
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<li class=fn><a href="#TQSlider-3"><b>TQSlider</b></a> ( int minValue, int maxValue, int pageStep, int value, Orientation orientation, TQWidget * parent, const char * name = 0 )</li>
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<li class=fn><a href="#~TQSlider"><b>~TQSlider</b></a> ()</li>
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<li class=fn>virtual void <a href="#setOrientation"><b>setOrientation</b></a> ( Orientation )</li>
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<li class=fn>Orientation <a href="#orientation"><b>orientation</b></a> () const</li>
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<li class=fn>virtual void <a href="#setTracking"><b>setTracking</b></a> ( bool enable )</li>
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<li class=fn>bool <a href="#tracking"><b>tracking</b></a> () const</li>
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<li class=fn>virtual void <a href="#setPalette"><b>setPalette</b></a> ( const TQPalette & p )</li>
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<li class=fn>int <a href="#sliderStart"><b>sliderStart</b></a> () const</li>
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<li class=fn>TQRect <a href="#sliderRect"><b>sliderRect</b></a> () const</li>
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<li class=fn>virtual void <a href="#setTickmarks"><b>setTickmarks</b></a> ( TickSetting )</li>
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<li class=fn>TickSetting <a href="#tickmarks"><b>tickmarks</b></a> () const</li>
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<li class=fn>virtual void <a href="#setTickInterval"><b>setTickInterval</b></a> ( int )</li>
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<li class=fn>int <a href="#tickInterval"><b>tickInterval</b></a> () const</li>
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<li class=fn>int <a href="#minValue"><b>minValue</b></a> () const</li>
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<li class=fn>int <a href="#maxValue"><b>maxValue</b></a> () const</li>
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<li class=fn>void <a href="#setMinValue"><b>setMinValue</b></a> ( int )</li>
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<li class=fn>void <a href="#setMaxValue"><b>setMaxValue</b></a> ( int )</li>
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<li class=fn>int <a href="#lineStep"><b>lineStep</b></a> () const</li>
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<li class=fn>int <a href="#pageStep"><b>pageStep</b></a> () const</li>
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<li class=fn>void <a href="#setLineStep"><b>setLineStep</b></a> ( int )</li>
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<li class=fn>void <a href="#setPageStep"><b>setPageStep</b></a> ( int )</li>
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<li class=fn>int <a href="#value"><b>value</b></a> () const</li>
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</ul>
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<h2>Public Slots</h2>
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<ul>
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<li class=fn>virtual void <a href="#setValue"><b>setValue</b></a> ( int )</li>
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<li class=fn>void <a href="#addStep"><b>addStep</b></a> ()</li>
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<li class=fn>void <a href="#subtractStep"><b>subtractStep</b></a> ()</li>
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</ul>
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<h2>Signals</h2>
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<ul>
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<li class=fn>void <a href="#valueChanged"><b>valueChanged</b></a> ( int value )</li>
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<li class=fn>void <a href="#sliderPressed"><b>sliderPressed</b></a> ()</li>
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<li class=fn>void <a href="#sliderMoved"><b>sliderMoved</b></a> ( int value )</li>
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<li class=fn>void <a href="#sliderReleased"><b>sliderReleased</b></a> ()</li>
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</ul>
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<h2>Important Inherited Members</h2>
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<ul>
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<li class=fn>void <a href="#setRange"><b>setRange</b></a> ( int minValue, int maxValue )</li>
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</ul>
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<h2>Properties</h2>
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<ul>
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<li class=fn>int <a href="#lineStep-prop"><b>lineStep</b></a> - the current line step</li>
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<li class=fn>int <a href="#maxValue-prop"><b>maxValue</b></a> - the current maximum value of the slider</li>
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<li class=fn>int <a href="#minValue-prop"><b>minValue</b></a> - the current minimum value of the slider</li>
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<li class=fn>Orientation <a href="#orientation-prop"><b>orientation</b></a> - the slider's orientation</li>
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<li class=fn>int <a href="#pageStep-prop"><b>pageStep</b></a> - the current page step</li>
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<li class=fn>int <a href="#tickInterval-prop"><b>tickInterval</b></a> - the interval between tickmarks</li>
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<li class=fn>TickSetting <a href="#tickmarks-prop"><b>tickmarks</b></a> - the tickmark settings for this slider</li>
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<li class=fn>bool <a href="#tracking-prop"><b>tracking</b></a> - whether slider tracking is enabled</li>
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<li class=fn>int <a href="#value-prop"><b>value</b></a> - the current slider value</li>
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</ul>
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<h2>Protected Members</h2>
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<ul>
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<li class=fn>virtual void <a href="#valueChange"><b>valueChange</b></a> ()</li>
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<li class=fn>virtual void <a href="#rangeChange"><b>rangeChange</b></a> ()</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The TQSlider widget provides a vertical or horizontal slider.
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<p>
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<p> The slider is the classic widget for controlling a bounded value.
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It lets the user move a slider along a horizontal or vertical
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groove and translates the slider's position into an integer value
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within the legal range.
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<p> TQSlider inherits <a href="ntqrangecontrol.html">TQRangeControl</a>, which provides the "integer" side
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of the slider. <a href="ntqrangecontrol.html#setRange">setRange</a>() and <a href="#value">value</a>() are likely to be used by
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practically all slider users; see the <a href="ntqrangecontrol.html">TQRangeControl</a>
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documentation for information about the many other functions that
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class provides.
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<p> The main functions offered by the slider itself are tickmark and
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orientation control; you can use <a href="#setTickmarks">setTickmarks</a>() to indicate where
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you want the tickmarks to be, <a href="#setTickInterval">setTickInterval</a>() to indicate how
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many of them you want and <a href="#setOrientation">setOrientation</a>() to indicate whether the
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slider is to be horizontal or vertical.
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<p> A slider accepts focus on Tab and uses the mouse wheel and a
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suitable keyboard interface.
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<p> <img src=qslider-m.png> <img src=qslider-w.png>
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<p>
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<p> <p>See also <a href="ntqscrollbar.html">TQScrollBar</a>, <a href="ntqspinbox.html">TQSpinBox</a>, <a href="guibooks.html#fowler">GUI Design Handbook: Slider</a>, and <a href="basic.html">Basic Widgets</a>.
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<hr><h2>Member Type Documentation</h2>
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<h3 class=fn><a name="TickSetting-enum"></a>TQSlider::TickSetting</h3>
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<p> This enum specifies where the tickmarks are to be drawn relative
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to the slider's groove and the handle the user moves.
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<ul>
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<li><tt>TQSlider::NoMarks</tt> - do not draw any tickmarks.
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<li><tt>TQSlider::Both</tt> - draw tickmarks on both sides of the groove.
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<li><tt>TQSlider::Above</tt> - draw tickmarks above the (horizontal) slider
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<li><tt>TQSlider::Below</tt> - draw tickmarks below the (horizontal) slider
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<li><tt>TQSlider::Left</tt> - draw tickmarks to the left of the (vertical) slider
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<li><tt>TQSlider::Right</tt> - draw tickmarks to the right of the (vertical) slider
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</ul>
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="TQSlider"></a>TQSlider::TQSlider ( <a href="ntqwidget.html">TQWidget</a> * parent, const char * name = 0 )
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</h3>
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Constructs a vertical slider.
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<p> The <em>parent</em> and <em>name</em> arguments are sent on to the <a href="ntqwidget.html">TQWidget</a>
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constructor.
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<h3 class=fn><a name="TQSlider-2"></a>TQSlider::TQSlider ( <a href="ntqt.html#Orientation-enum">Orientation</a> orientation, <a href="ntqwidget.html">TQWidget</a> * parent, const char * name = 0 )
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</h3>
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Constructs a slider.
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<p> The <em>orientation</em> must be <a href="ntqt.html#Orientation-enum">TQt::Vertical</a> or <a href="ntqt.html#Orientation-enum">TQt::Horizontal</a>.
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<p> The <em>parent</em> and <em>name</em> arguments are sent on to the <a href="ntqwidget.html">TQWidget</a>
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constructor.
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<h3 class=fn><a name="TQSlider-3"></a>TQSlider::TQSlider ( int minValue, int maxValue, int pageStep, int value, <a href="ntqt.html#Orientation-enum">Orientation</a> orientation, <a href="ntqwidget.html">TQWidget</a> * parent, const char * name = 0 )
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</h3>
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Constructs a slider whose value can never be smaller than <em>minValue</em> or greater than <em>maxValue</em>, whose page step size is <em>pageStep</em> and whose value is initially <em>value</em> (which is
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guaranteed to be in range using <a href="ntqrangecontrol.html#bound">bound</a>()).
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<p> If <em>orientation</em> is <a href="ntqt.html#Orientation-enum">TQt::Vertical</a> the slider is vertical and if it
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is <a href="ntqt.html#Orientation-enum">TQt::Horizontal</a> the slider is horizontal.
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<p> The <em>parent</em> and <em>name</em> arguments are sent on to the <a href="ntqwidget.html">TQWidget</a>
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constructor.
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<h3 class=fn><a name="~TQSlider"></a>TQSlider::~TQSlider ()
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</h3>
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Destructor.
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<h3 class=fn>void <a name="addStep"></a>TQSlider::addStep ()<tt> [slot]</tt>
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</h3>
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Moves the slider one <a href="#pageStep">pageStep</a>() up or right.
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<h3 class=fn>int <a name="lineStep"></a>TQSlider::lineStep () const
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</h3><p>Returns the current line step.
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See the <a href="ntqslider.html#lineStep-prop">"lineStep"</a> property for details.
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<h3 class=fn>int <a name="maxValue"></a>TQSlider::maxValue () const
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</h3><p>Returns the current maximum value of the slider.
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See the <a href="ntqslider.html#maxValue-prop">"maxValue"</a> property for details.
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<h3 class=fn>int <a name="minValue"></a>TQSlider::minValue () const
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</h3><p>Returns the current minimum value of the slider.
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See the <a href="ntqslider.html#minValue-prop">"minValue"</a> property for details.
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<h3 class=fn><a href="ntqt.html#Orientation-enum">Orientation</a> <a name="orientation"></a>TQSlider::orientation () const
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</h3><p>Returns the slider's orientation.
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See the <a href="ntqslider.html#orientation-prop">"orientation"</a> property for details.
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<h3 class=fn>int <a name="pageStep"></a>TQSlider::pageStep () const
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</h3><p>Returns the current page step.
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See the <a href="ntqslider.html#pageStep-prop">"pageStep"</a> property for details.
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<h3 class=fn>void <a name="rangeChange"></a>TQSlider::rangeChange ()<tt> [virtual protected]</tt>
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</h3>
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Implements the virtual <a href="ntqrangecontrol.html">TQRangeControl</a> function.
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<p>Reimplemented from <a href="ntqrangecontrol.html#rangeChange">TQRangeControl</a>.
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<h3 class=fn>void <a name="setLineStep"></a>TQSlider::setLineStep ( int )
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</h3><p>Sets the current line step.
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See the <a href="ntqslider.html#lineStep-prop">"lineStep"</a> property for details.
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<h3 class=fn>void <a name="setMaxValue"></a>TQSlider::setMaxValue ( int )
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</h3><p>Sets the current maximum value of the slider.
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See the <a href="ntqslider.html#maxValue-prop">"maxValue"</a> property for details.
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<h3 class=fn>void <a name="setMinValue"></a>TQSlider::setMinValue ( int )
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</h3><p>Sets the current minimum value of the slider.
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See the <a href="ntqslider.html#minValue-prop">"minValue"</a> property for details.
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<h3 class=fn>void <a name="setOrientation"></a>TQSlider::setOrientation ( <a href="ntqt.html#Orientation-enum">Orientation</a> )<tt> [virtual]</tt>
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</h3><p>Sets the slider's orientation.
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See the <a href="ntqslider.html#orientation-prop">"orientation"</a> property for details.
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<h3 class=fn>void <a name="setPageStep"></a>TQSlider::setPageStep ( int )
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</h3><p>Sets the current page step.
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See the <a href="ntqslider.html#pageStep-prop">"pageStep"</a> property for details.
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<h3 class=fn>void <a name="setPalette"></a>TQSlider::setPalette ( const <a href="ntqpalette.html">TQPalette</a> & p )<tt> [virtual]</tt>
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</h3>
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Reimplements the virtual function <a href="ntqwidget.html#setPalette">TQWidget::setPalette</a>().
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<p> Sets the background color to the mid color for <a href="motif-extension.html#Motif">Motif</a> style sliders
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using palette <em>p</em>.
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<p>Reimplemented from <a href="ntqwidget.html#setPalette">TQWidget</a>.
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<h3 class=fn>void <a name="setRange"></a>TQRangeControl::setRange ( int minValue, int maxValue )
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</h3>
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Sets the range control's minimum value to <em>minValue</em> and its
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maximum value to <em>maxValue</em>.
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<p> Calls the virtual <a href="#rangeChange">rangeChange</a>() function if one or both of the new
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minimum and maximum values are different from the previous
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setting. Calls the virtual <a href="#valueChange">valueChange</a>() function if the current
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value is adjusted because it was outside the new range.
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<p> If <em>maxValue</em> is smaller than <em>minValue</em>, <em>minValue</em> becomes
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the only legal value.
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<p> <p>See also <a href="#minValue-prop">minValue</a> and <a href="#maxValue-prop">maxValue</a>.
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<p>Examples: <a href="listbox-example.html#x1441">listbox/listbox.cpp</a>, <a href="tutorial1-12.html#x2387">t12/lcdrange.cpp</a>, <a href="tutorial1-05.html#x2315">t5/main.cpp</a>, <a href="tutorial1-06.html#x2325">t6/main.cpp</a>, <a href="tutorial1-08.html#x2334">t8/lcdrange.cpp</a>, and <a href="xform-example.html#x1250">xform/xform.cpp</a>.
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<h3 class=fn>void <a name="setTickInterval"></a>TQSlider::setTickInterval ( int )<tt> [virtual]</tt>
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</h3><p>Sets the interval between tickmarks.
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See the <a href="ntqslider.html#tickInterval-prop">"tickInterval"</a> property for details.
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<h3 class=fn>void <a name="setTickmarks"></a>TQSlider::setTickmarks ( <a href="ntqslider.html#TickSetting-enum">TickSetting</a> )<tt> [virtual]</tt>
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</h3><p>Sets the tickmark settings for this slider.
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See the <a href="ntqslider.html#tickmarks-prop">"tickmarks"</a> property for details.
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<h3 class=fn>void <a name="setTracking"></a>TQSlider::setTracking ( bool enable )<tt> [virtual]</tt>
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</h3><p>Sets whether slider tracking is enabled to <em>enable</em>.
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See the <a href="ntqslider.html#tracking-prop">"tracking"</a> property for details.
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<h3 class=fn>void <a name="setValue"></a>TQSlider::setValue ( int )<tt> [virtual slot]</tt>
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</h3><p>Sets the current slider value.
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See the <a href="ntqslider.html#value-prop">"value"</a> property for details.
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<h3 class=fn>void <a name="sliderMoved"></a>TQSlider::sliderMoved ( int value )<tt> [signal]</tt>
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</h3>
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<p> This signal is emitted when the slider is dragged, with the new
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slider <em>value</em> as its argument.
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<h3 class=fn>void <a name="sliderPressed"></a>TQSlider::sliderPressed ()<tt> [signal]</tt>
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</h3>
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<p> This signal is emitted when the user presses the slider with the
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mouse.
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<h3 class=fn><a href="ntqrect.html">TQRect</a> <a name="sliderRect"></a>TQSlider::sliderRect () const
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</h3>
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Returns the slider handle rectangle. (This is the visual marker
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that the user can move.)
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<h3 class=fn>void <a name="sliderReleased"></a>TQSlider::sliderReleased ()<tt> [signal]</tt>
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</h3>
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<p> This signal is emitted when the user releases the slider with the mouse.
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<h3 class=fn>int <a name="sliderStart"></a>TQSlider::sliderStart () const
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</h3>
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<p> Returns the start position of the slider.
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<h3 class=fn>void <a name="subtractStep"></a>TQSlider::subtractStep ()<tt> [slot]</tt>
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</h3>
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Moves the slider one <a href="#pageStep">pageStep</a>() down or left.
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<h3 class=fn>int <a name="tickInterval"></a>TQSlider::tickInterval () const
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</h3><p>Returns the interval between tickmarks.
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See the <a href="ntqslider.html#tickInterval-prop">"tickInterval"</a> property for details.
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<h3 class=fn><a href="ntqslider.html#TickSetting-enum">TickSetting</a> <a name="tickmarks"></a>TQSlider::tickmarks () const
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</h3><p>Returns the tickmark settings for this slider.
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See the <a href="ntqslider.html#tickmarks-prop">"tickmarks"</a> property for details.
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<h3 class=fn>bool <a name="tracking"></a>TQSlider::tracking () const
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</h3><p>Returns TRUE if slider tracking is enabled; otherwise returns FALSE.
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See the <a href="ntqslider.html#tracking-prop">"tracking"</a> property for details.
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<h3 class=fn>int <a name="value"></a>TQSlider::value () const
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</h3><p>Returns the current slider value.
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See the <a href="ntqslider.html#value-prop">"value"</a> property for details.
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<h3 class=fn>void <a name="valueChange"></a>TQSlider::valueChange ()<tt> [virtual protected]</tt>
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</h3>
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Implements the virtual <a href="ntqrangecontrol.html">TQRangeControl</a> function.
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<p>Reimplemented from <a href="ntqrangecontrol.html#valueChange">TQRangeControl</a>.
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<h3 class=fn>void <a name="valueChanged"></a>TQSlider::valueChanged ( int value )<tt> [signal]</tt>
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</h3>
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<p> This signal is emitted when the slider value is changed, with the
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new slider <em>value</em> as its argument.
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<p>Examples: <a href="rangecontrols-example.html#x1386">rangecontrols/rangecontrols.cpp</a>, <a href="qaxserver-example-simple.html#x2528">simple/main.cpp</a>, <a href="tutorial1-12.html#x2389">t12/lcdrange.cpp</a>, <a href="tutorial1-05.html#x2317">t5/main.cpp</a>, <a href="tutorial1-06.html#x2327">t6/main.cpp</a>, <a href="tutorial1-07.html#x2333">t7/lcdrange.cpp</a>, and <a href="xform-example.html#x1263">xform/xform.cpp</a>.
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<hr><h2>Property Documentation</h2>
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<h3 class=fn>int <a name="lineStep-prop"></a>lineStep</h3>
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<p>This property holds the current line step.
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<p>When setting lineStep, the virtual <a href="ntqrangecontrol.html#stepChange">stepChange</a>() function will be
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called if the new line step is different from the previous
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setting.
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<p> <p>See also <a href="ntqrangecontrol.html#setSteps">setSteps</a>(), <a href="ntqrangecontrol.html#pageStep">TQRangeControl::pageStep</a>(), and <a href="ntqrangecontrol.html#setRange">setRange</a>().
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<p>Set this property's value with <a href="#setLineStep">setLineStep</a>() and get this property's value with <a href="#lineStep">lineStep</a>().
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<h3 class=fn>int <a name="maxValue-prop"></a>maxValue</h3>
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<p>This property holds the current maximum value of the slider.
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<p>When setting this property, the <a href="#minValue-prop">TQSlider::minValue</a> is adjusted,
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if necessary, to ensure that the range remains valid.
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<p> <p>See also <a href="ntqrangecontrol.html#setRange">setRange</a>().
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<p>Set this property's value with <a href="#setMaxValue">setMaxValue</a>() and get this property's value with <a href="#maxValue">maxValue</a>().
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<h3 class=fn>int <a name="minValue-prop"></a>minValue</h3>
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<p>This property holds the current minimum value of the slider.
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<p>When setting this property, the <a href="#maxValue-prop">TQSlider::maxValue</a> is adjusted,
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if necessary, to ensure that the range remains valid.
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<p> <p>See also <a href="ntqrangecontrol.html#setRange">setRange</a>().
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<p>Set this property's value with <a href="#setMinValue">setMinValue</a>() and get this property's value with <a href="#minValue">minValue</a>().
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<h3 class=fn><a href="ntqt.html#Orientation-enum">Orientation</a> <a name="orientation-prop"></a>orientation</h3>
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<p>This property holds the slider's orientation.
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<p>The orientation must be <a href="ntqt.html#Orientation-enum">TQt::Vertical</a> (the default) or <a href="ntqt.html#Orientation-enum">TQt::Horizontal</a>.
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<p>Set this property's value with <a href="#setOrientation">setOrientation</a>() and get this property's value with <a href="#orientation">orientation</a>().
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<h3 class=fn>int <a name="pageStep-prop"></a>pageStep</h3>
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<p>This property holds the current page step.
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<p>When setting pageStep, the virtual <a href="ntqrangecontrol.html#stepChange">stepChange</a>() function will be
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called if the new page step is different from the previous
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setting.
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<p> <p>See also <a href="ntqrangecontrol.html#setSteps">TQRangeControl::setSteps</a>(), <a href="#lineStep-prop">lineStep</a>, and <a href="ntqrangecontrol.html#setRange">setRange</a>().
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<p>Set this property's value with <a href="#setPageStep">setPageStep</a>() and get this property's value with <a href="#pageStep">pageStep</a>().
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<h3 class=fn>int <a name="tickInterval-prop"></a>tickInterval</h3>
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<p>This property holds the interval between tickmarks.
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<p>This is a value interval, not a pixel interval. If it is 0, the
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slider will choose between <a href="#lineStep">lineStep</a>() and <a href="#pageStep">pageStep</a>(). The initial
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value of tickInterval is 0.
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<p> <p>See also <a href="ntqrangecontrol.html#lineStep">TQRangeControl::lineStep</a>() and <a href="ntqrangecontrol.html#pageStep">TQRangeControl::pageStep</a>().
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<p>Set this property's value with <a href="#setTickInterval">setTickInterval</a>() and get this property's value with <a href="#tickInterval">tickInterval</a>().
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<h3 class=fn><a href="ntqslider.html#TickSetting-enum">TickSetting</a> <a name="tickmarks-prop"></a>tickmarks</h3>
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|
<p>This property holds the tickmark settings for this slider.
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<p>The valid values are in <a href="#TickSetting-enum">TQSlider::TickSetting</a>. The default is
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<a href="#TickSetting-enum">NoMarks</a>.
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<p> <p>See also <a href="#tickInterval-prop">tickInterval</a>.
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<p>Set this property's value with <a href="#setTickmarks">setTickmarks</a>() and get this property's value with <a href="#tickmarks">tickmarks</a>().
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<h3 class=fn>bool <a name="tracking-prop"></a>tracking</h3>
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|
<p>This property holds whether slider tracking is enabled.
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|
<p>If tracking is enabled (the default), the slider emits the
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<a href="#valueChanged">valueChanged</a>() signal whenever the slider is being dragged. If
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tracking is disabled, the slider emits the valueChanged() signal
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when the user releases the mouse button (unless the value happens
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to be the same as before).
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<p>Set this property's value with <a href="#setTracking">setTracking</a>() and get this property's value with <a href="#tracking">tracking</a>().
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<h3 class=fn>int <a name="value-prop"></a>value</h3>
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<p>This property holds the current slider value.
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<p>Set this property's value with <a href="#setValue">setValue</a>() and get this property's value with <a href="#value">value</a>().
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<p><p>See also <a href="ntqrangecontrol.html#value">TQRangeControl::value</a>() and <a href="ntqrangecontrol.html#prevValue">prevValue</a>().
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<hr><p>
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This file is part of the <a href="index.html">TQt toolkit</a>.
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Copyright © 1995-2007
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<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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