source: trunk/doc/html/qscrollbar.html

Last change on this file was 190, checked in by rudi, 14 years ago

reference documentation added
File size: 23.5 KB
RevLine 
[190]1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
2<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/widgets/qscrollbar.cpp:53 -->
3<html>
4<head>
5<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
6<title>QScrollBar Class</title>
7<style type="text/css"><!--
8fn { margin-left: 1cm; text-indent: -1cm; }
9a:link { color: #004faf; text-decoration: none }
10a:visited { color: #672967; text-decoration: none }
11body { background: #ffffff; color: black; }
12--></style>
13</head>
14<body>
15
16<table border="0" cellpadding="0" cellspacing="0" width="100%">
17<tr bgcolor="#E5E5E5">
18<td valign=center>
19 <a href="index.html">
20<font color="#004faf">Home</font></a>
21 | <a href="classes.html">
22<font color="#004faf">All&nbsp;Classes</font></a>
23 | <a href="mainclasses.html">
24<font color="#004faf">Main&nbsp;Classes</font></a>
25 | <a href="annotated.html">
26<font color="#004faf">Annotated</font></a>
27 | <a href="groups.html">
28<font color="#004faf">Grouped&nbsp;Classes</font></a>
29 | <a href="functions.html">
30<font color="#004faf">Functions</font></a>
31</td>
32<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QScrollBar Class Reference</h1>
33
34<p>The QScrollBar widget provides a vertical or horizontal scroll bar.
35<a href="#details">More...</a>
36<p><tt>#include &lt;<a href="qscrollbar-h.html">qscrollbar.h</a>&gt;</tt>
37<p>Inherits <a href="qwidget.html">QWidget</a> and <a href="qrangecontrol.html">QRangeControl</a>.
38<p><a href="qscrollbar-members.html">List of all member functions.</a>
39<h2>Public Members</h2>
40<ul>
41<li class=fn><a href="#QScrollBar"><b>QScrollBar</b></a> ( QWidget&nbsp;*&nbsp;parent, const&nbsp;char&nbsp;*&nbsp;name = 0 )</li>
42<li class=fn><a href="#QScrollBar-2"><b>QScrollBar</b></a> ( Orientation&nbsp;orientation, QWidget&nbsp;*&nbsp;parent, const&nbsp;char&nbsp;*&nbsp;name = 0 )</li>
43<li class=fn><a href="#QScrollBar-3"><b>QScrollBar</b></a> ( int&nbsp;minValue, int&nbsp;maxValue, int&nbsp;lineStep, int&nbsp;pageStep, int&nbsp;value, Orientation&nbsp;orientation, QWidget&nbsp;*&nbsp;parent, const&nbsp;char&nbsp;*&nbsp;name = 0 )</li>
44<li class=fn><a href="#~QScrollBar"><b>~QScrollBar</b></a> ()</li>
45<li class=fn>virtual void <a href="#setOrientation"><b>setOrientation</b></a> ( Orientation )</li>
46<li class=fn>Orientation <a href="#orientation"><b>orientation</b></a> () const</li>
47<li class=fn>virtual void <a href="#setTracking"><b>setTracking</b></a> ( bool&nbsp;enable )</li>
48<li class=fn>bool <a href="#tracking"><b>tracking</b></a> () const</li>
49<li class=fn>bool <a href="#draggingSlider"><b>draggingSlider</b></a> () const</li>
50<li class=fn>virtual void <a href="#setPalette"><b>setPalette</b></a> ( const&nbsp;QPalette&nbsp;&amp;&nbsp;p )</li>
51<li class=fn>int <a href="#minValue"><b>minValue</b></a> () const</li>
52<li class=fn>int <a href="#maxValue"><b>maxValue</b></a> () const</li>
53<li class=fn>void <a href="#setMinValue"><b>setMinValue</b></a> ( int )</li>
54<li class=fn>void <a href="#setMaxValue"><b>setMaxValue</b></a> ( int )</li>
55<li class=fn>int <a href="#lineStep"><b>lineStep</b></a> () const</li>
56<li class=fn>int <a href="#pageStep"><b>pageStep</b></a> () const</li>
57<li class=fn>void <a href="#setLineStep"><b>setLineStep</b></a> ( int )</li>
58<li class=fn>void <a href="#setPageStep"><b>setPageStep</b></a> ( int )</li>
59<li class=fn>int <a href="#value"><b>value</b></a> () const</li>
60<li class=fn>int <a href="#sliderStart"><b>sliderStart</b></a> () const</li>
61<li class=fn>QRect <a href="#sliderRect"><b>sliderRect</b></a> () const</li>
62</ul>
63<h2>Public Slots</h2>
64<ul>
65<li class=fn>void <a href="#setValue"><b>setValue</b></a> ( int )</li>
66</ul>
67<h2>Signals</h2>
68<ul>
69<li class=fn>void <a href="#valueChanged"><b>valueChanged</b></a> ( int&nbsp;value )</li>
70<li class=fn>void <a href="#sliderPressed"><b>sliderPressed</b></a> ()</li>
71<li class=fn>void <a href="#sliderMoved"><b>sliderMoved</b></a> ( int&nbsp;value )</li>
72<li class=fn>void <a href="#sliderReleased"><b>sliderReleased</b></a> ()</li>
73<li class=fn>void <a href="#nextLine"><b>nextLine</b></a> ()</li>
74<li class=fn>void <a href="#prevLine"><b>prevLine</b></a> ()</li>
75<li class=fn>void <a href="#nextPage"><b>nextPage</b></a> ()</li>
76<li class=fn>void <a href="#prevPage"><b>prevPage</b></a> ()</li>
77</ul>
78<h2>Properties</h2>
79<ul>
80<li class=fn>bool <a href="#draggingSlider-prop"><b>draggingSlider</b></a>&nbsp;- whether the user has clicked the mouse on the slider and is currently dragging it &nbsp;<em>(read only)</em></li>
81<li class=fn>int <a href="#lineStep-prop"><b>lineStep</b></a>&nbsp;- the line step</li>
82<li class=fn>int <a href="#maxValue-prop"><b>maxValue</b></a>&nbsp;- the scroll bar's maximum value</li>
83<li class=fn>int <a href="#minValue-prop"><b>minValue</b></a>&nbsp;- the scroll bar's minimum value</li>
84<li class=fn>Orientation <a href="#orientation-prop"><b>orientation</b></a>&nbsp;- the orientation of the scroll bar</li>
85<li class=fn>int <a href="#pageStep-prop"><b>pageStep</b></a>&nbsp;- the page step</li>
86<li class=fn>bool <a href="#tracking-prop"><b>tracking</b></a>&nbsp;- whether scroll bar tracking is enabled</li>
87<li class=fn>int <a href="#value-prop"><b>value</b></a>&nbsp;- the scroll bar's value</li>
88</ul>
89<h2>Protected Members</h2>
90<ul>
91<li class=fn>virtual void <a href="#hideEvent"><b>hideEvent</b></a> ( QHideEvent * )</li>
92</ul>
93<hr><a name="details"></a><h2>Detailed Description</h2>
94
95
96The QScrollBar widget provides a vertical or horizontal scroll bar.
97<p>
98<p> A scroll bar allows the user to control a value within a
99program-definable range and gives users a visible indication of
100the current value of a <a href="qrangecontrol.html">range control</a>.
101<p> Scroll bars include four separate controls:
102<p> <ul>
103<p> <li> The <em>line-up</em> and <em>line-down</em> controls are little buttons
104which the user can use to move one "line" up or down. The meaning
105of line is configurable. In editors and list boxes it means one
106line of text; in an image viewer it might mean 20 pixels.
107<p> <li> The <em>slider</em> is the handle that indicates the current value of
108the scroll bar, which the user can drag to change the value. This
109part of the scroll bar is sometimes called the "thumb".
110<p> <li> The <em>page-up/page-down</em> control is the area on which the
111slider slides (the scroll bar's background). Clicking here moves
112the scroll bar towards the click. The meaning of "page" is also
113configurable: in editors and list boxes it means as many lines as
114there is space for in the widget.
115<p> </ul>
116<p> QScrollBar has very few of its own functions; it mostly relies on
117<a href="qrangecontrol.html">QRangeControl</a>. The most useful functions are <a href="#setValue">setValue</a>() to set the
118scroll bar directly to some value; <a href="qrangecontrol.html#addPage">addPage</a>(), <a href="qrangecontrol.html#addLine">addLine</a>(),
119<a href="qrangecontrol.html#subtractPage">subtractPage</a>(), and <a href="qrangecontrol.html#subtractLine">subtractLine</a>() to simulate the effects of
120clicking (useful for accelerator keys); <a href="qrangecontrol.html#setSteps">setSteps</a>() to define the
121values of <a href="#pageStep">pageStep</a>() and <a href="#lineStep">lineStep</a>(); and <a href="qrangecontrol.html#setRange">setRange</a>() to set the
122<a href="#minValue">minValue</a>() and <a href="#maxValue">maxValue</a>() of the scroll bar. QScrollBar has a
123convenience constructor with which you can set most of these
124properties.
125<p> Some GUI styles (for example, the Windows and <a href="motif-extension.html#Motif">Motif</a> styles
126provided with Qt), also use the pageStep() value to calculate the
127size of the slider.
128<p> In addition to the access functions from <a href="qrangecontrol.html">QRangeControl</a>, QScrollBar
129provides a comprehensive set of signals:
130<center><table cellpadding="4" cellspacing="2" border="0">
131<tr bgcolor="#a2c511"> <th valign="top">Signal <th valign="top">Emitted when
132<tr bgcolor="#f0f0f0"> <td valign="top"><a href="#valueChanged">valueChanged</a>()
133<td valign="top">the scroll bar's value has changed. The <a href="#tracking">tracking</a>()
134determines whether this signal is emitted during user
135interaction.
136<tr bgcolor="#d0d0d0"> <td valign="top"><a href="#sliderPressed">sliderPressed</a>()
137<td valign="top">the user starts to drag the slider.
138<tr bgcolor="#f0f0f0"> <td valign="top"><a href="#sliderMoved">sliderMoved</a>()
139<td valign="top">the user drags the slider.
140<tr bgcolor="#d0d0d0"> <td valign="top"><a href="#sliderReleased">sliderReleased</a>()
141<td valign="top">the user releases the slider.
142<tr bgcolor="#f0f0f0"> <td valign="top"><a href="#nextLine">nextLine</a>()
143<td valign="top">the scroll bar has moved one line down or right. Line is
144defined in <a href="qrangecontrol.html">QRangeControl</a>.
145<tr bgcolor="#d0d0d0"> <td valign="top"><a href="#prevLine">prevLine</a>()
146<td valign="top">the scroll bar has moved one line up or left.
147<tr bgcolor="#f0f0f0"> <td valign="top"><a href="#nextPage">nextPage</a>()
148<td valign="top">the scroll bar has moved one page down or right.
149<tr bgcolor="#d0d0d0"> <td valign="top"><a href="#prevPage">prevPage</a>()
150<td valign="top">the scroll bar has moved one page up or left.
151</table></center>
152<p> QScrollBar only provides integer ranges. Note that although
153QScrollBar handles very large numbers, scroll bars on current
154screens cannot usefully control ranges above about 100,000 pixels.
155Beyond that, it becomes difficult for the user to control the
156scroll bar using either the keyboard or the mouse.
157<p> A scroll bar can be controlled by the keyboard, but it has a
158default <a href="qwidget.html#focusPolicy">focusPolicy</a>() of <a href="qwidget.html#FocusPolicy-enum">NoFocus</a>. Use <a href="qwidget.html#setFocusPolicy">setFocusPolicy</a>() to
159enable <a href="focus.html#keyboard-focus">keyboard focus</a>. See <a href="qwidget.html#keyPressEvent">keyPressEvent</a>() for a list of key
160bindings.
161<p> If you need to add scroll bars to an interface, consider using the
162<a href="qscrollview.html">QScrollView</a> class, which encapsulates the common uses for scroll
163bars.
164<p> <img src=qscrbar-m.png> <img src=qscrbar-w.png>
165<p> <p>See also <a href="qslider.html">QSlider</a>, <a href="qspinbox.html">QSpinBox</a>, <a href="qscrollview.html">QScrollView</a>, <a href="guibooks.html#fowler">GUI Design Handbook: Scroll Bar</a>, and <a href="basic.html">Basic Widgets</a>.
166
167<hr><h2>Member Function Documentation</h2>
168<h3 class=fn><a name="QScrollBar"></a>QScrollBar::QScrollBar ( <a href="qwidget.html">QWidget</a>&nbsp;*&nbsp;parent, const&nbsp;char&nbsp;*&nbsp;name = 0 )
169</h3>
170Constructs a vertical scroll bar.
171<p> The <em>parent</em> and <em>name</em> arguments are sent on to the <a href="qwidget.html">QWidget</a>
172constructor.
173<p> The <a href="#minValue-prop">minValue</a> defaults to 0, the <a href="#maxValue-prop">maxValue</a> to 99, with a <a href="#lineStep-prop">lineStep</a> size of 1 and a <a href="#pageStep-prop">pageStep</a> size of 10, and an initial
174<a href="#value-prop">value</a> of 0.
175
176<h3 class=fn><a name="QScrollBar-2"></a>QScrollBar::QScrollBar ( <a href="qt.html#Orientation-enum">Orientation</a>&nbsp;orientation, <a href="qwidget.html">QWidget</a>&nbsp;*&nbsp;parent, const&nbsp;char&nbsp;*&nbsp;name = 0 )
177</h3>
178Constructs a scroll bar.
179<p> The <em>orientation</em> must be <a href="qt.html#Orientation-enum">Qt::Vertical</a> or <a href="qt.html#Orientation-enum">Qt::Horizontal</a>.
180<p> The <em>parent</em> and <em>name</em> arguments are sent on to the <a href="qwidget.html">QWidget</a>
181constructor.
182<p> The <a href="#minValue-prop">minValue</a> defaults to 0, the <a href="#maxValue-prop">maxValue</a> to 99, with a <a href="#lineStep-prop">lineStep</a> size of 1 and a <a href="#pageStep-prop">pageStep</a> size of 10, and an initial
183<a href="#value-prop">value</a> of 0.
184
185<h3 class=fn><a name="QScrollBar-3"></a>QScrollBar::QScrollBar ( int&nbsp;minValue, int&nbsp;maxValue, int&nbsp;lineStep, int&nbsp;pageStep, int&nbsp;value, <a href="qt.html#Orientation-enum">Orientation</a>&nbsp;orientation, <a href="qwidget.html">QWidget</a>&nbsp;*&nbsp;parent, const&nbsp;char&nbsp;*&nbsp;name = 0 )
186</h3>
187Constructs a scroll bar whose value can never be smaller than <em>minValue</em> or greater than <em>maxValue</em>, whose line step size is <em>lineStep</em> and page step size is <em>pageStep</em> and whose value is
188initially <em>value</em> (which is guaranteed to be in range using
189<a href="qrangecontrol.html#bound">bound</a>()).
190<p> If <em>orientation</em> is <a href="qt.html#Orientation-enum">Vertical</a> the scroll bar is vertical and if
191it is <a href="qt.html#Orientation-enum">Horizontal</a> the scroll bar is horizontal.
192<p> The <em>parent</em> and <em>name</em> arguments are sent on to the <a href="qwidget.html">QWidget</a>
193constructor.
194
195<h3 class=fn><a name="~QScrollBar"></a>QScrollBar::~QScrollBar ()
196</h3>
197Destructor.
198
199<h3 class=fn>bool <a name="draggingSlider"></a>QScrollBar::draggingSlider () const
200</h3><p>Returns TRUE if the user has clicked the mouse on the slider and is currently dragging it; otherwise returns FALSE.
201See the <a href="qscrollbar.html#draggingSlider-prop">"draggingSlider"</a> property for details.
202<h3 class=fn>void <a name="hideEvent"></a>QScrollBar::hideEvent ( <a href="qhideevent.html">QHideEvent</a>&nbsp;* )<tt> [virtual protected]</tt>
203</h3>
204This function is called when the scrollbar is hidden.
205
206<p>Reimplemented from <a href="qwidget.html#hideEvent">QWidget</a>.
207<h3 class=fn>int <a name="lineStep"></a>QScrollBar::lineStep () const
208</h3><p>Returns the line step.
209See the <a href="qscrollbar.html#lineStep-prop">"lineStep"</a> property for details.
210<h3 class=fn>int <a name="maxValue"></a>QScrollBar::maxValue () const
211</h3><p>Returns the scroll bar's maximum value.
212See the <a href="qscrollbar.html#maxValue-prop">"maxValue"</a> property for details.
213<h3 class=fn>int <a name="minValue"></a>QScrollBar::minValue () const
214</h3><p>Returns the scroll bar's minimum value.
215See the <a href="qscrollbar.html#minValue-prop">"minValue"</a> property for details.
216<h3 class=fn>void <a name="nextLine"></a>QScrollBar::nextLine ()<tt> [signal]</tt>
217</h3>
218
219<p> This signal is emitted when the scroll bar scrolls one line down
220or right.
221
222<h3 class=fn>void <a name="nextPage"></a>QScrollBar::nextPage ()<tt> [signal]</tt>
223</h3>
224
225<p> This signal is emitted when the scroll bar scrolls one page down
226or right.
227
228<h3 class=fn><a href="qt.html#Orientation-enum">Orientation</a> <a name="orientation"></a>QScrollBar::orientation () const
229</h3><p>Returns the orientation of the scroll bar.
230See the <a href="qscrollbar.html#orientation-prop">"orientation"</a> property for details.
231<h3 class=fn>int <a name="pageStep"></a>QScrollBar::pageStep () const
232</h3><p>Returns the page step.
233See the <a href="qscrollbar.html#pageStep-prop">"pageStep"</a> property for details.
234<h3 class=fn>void <a name="prevLine"></a>QScrollBar::prevLine ()<tt> [signal]</tt>
235</h3>
236
237<p> This signal is emitted when the scroll bar scrolls one line up or
238left.
239
240<h3 class=fn>void <a name="prevPage"></a>QScrollBar::prevPage ()<tt> [signal]</tt>
241</h3>
242
243<p> This signal is emitted when the scroll bar scrolls one page up or
244left.
245
246<h3 class=fn>void <a name="setLineStep"></a>QScrollBar::setLineStep ( int )
247</h3><p>Sets the line step.
248See the <a href="qscrollbar.html#lineStep-prop">"lineStep"</a> property for details.
249<h3 class=fn>void <a name="setMaxValue"></a>QScrollBar::setMaxValue ( int )
250</h3><p>Sets the scroll bar's maximum value.
251See the <a href="qscrollbar.html#maxValue-prop">"maxValue"</a> property for details.
252<h3 class=fn>void <a name="setMinValue"></a>QScrollBar::setMinValue ( int )
253</h3><p>Sets the scroll bar's minimum value.
254See the <a href="qscrollbar.html#minValue-prop">"minValue"</a> property for details.
255<h3 class=fn>void <a name="setOrientation"></a>QScrollBar::setOrientation ( <a href="qt.html#Orientation-enum">Orientation</a> )<tt> [virtual]</tt>
256</h3><p>Sets the orientation of the scroll bar.
257See the <a href="qscrollbar.html#orientation-prop">"orientation"</a> property for details.
258<h3 class=fn>void <a name="setPageStep"></a>QScrollBar::setPageStep ( int )
259</h3><p>Sets the page step.
260See the <a href="qscrollbar.html#pageStep-prop">"pageStep"</a> property for details.
261<h3 class=fn>void <a name="setPalette"></a>QScrollBar::setPalette ( const&nbsp;<a href="qpalette.html">QPalette</a>&nbsp;&amp;&nbsp;p )<tt> [virtual]</tt>
262</h3>
263Reimplements the virtual function <a href="qwidget.html#setPalette">QWidget::setPalette</a>().
264<p> Sets the background color to the mid color for <a href="motif-extension.html#Motif">Motif</a> style scroll
265bars using palette <em>p</em>.
266
267<p>Reimplemented from <a href="qwidget.html#setPalette">QWidget</a>.
268<h3 class=fn>void <a name="setTracking"></a>QScrollBar::setTracking ( bool&nbsp;enable )<tt> [virtual]</tt>
269</h3><p>Sets whether scroll bar tracking is enabled to <em>enable</em>.
270See the <a href="qscrollbar.html#tracking-prop">"tracking"</a> property for details.
271<h3 class=fn>void <a name="setValue"></a>QScrollBar::setValue ( int )<tt> [slot]</tt>
272</h3><p>Sets the scroll bar's value.
273See the <a href="qscrollbar.html#value-prop">"value"</a> property for details.
274<h3 class=fn>void <a name="sliderMoved"></a>QScrollBar::sliderMoved ( int&nbsp;value )<tt> [signal]</tt>
275</h3>
276
277<p> This signal is emitted when the slider is dragged by the user, with
278the new scroll bar <em>value</em> as an argument.
279<p> This signal is emitted even when tracking is turned off.
280<p> <p>See also <a href="#tracking-prop">tracking</a>, <a href="#valueChanged">valueChanged</a>(), <a href="#nextLine">nextLine</a>(), <a href="#prevLine">prevLine</a>(), <a href="#nextPage">nextPage</a>(), and <a href="#prevPage">prevPage</a>().
281
282<h3 class=fn>void <a name="sliderPressed"></a>QScrollBar::sliderPressed ()<tt> [signal]</tt>
283</h3>
284
285<p> This signal is emitted when the user presses the slider with the
286mouse.
287
288<h3 class=fn><a href="qrect.html">QRect</a> <a name="sliderRect"></a>QScrollBar::sliderRect () const
289</h3>
290Returns the scroll bar slider rectangle.
291<p> <p>See also <a href="#sliderStart">sliderStart</a>().
292
293<h3 class=fn>void <a name="sliderReleased"></a>QScrollBar::sliderReleased ()<tt> [signal]</tt>
294</h3>
295
296<p> This signal is emitted when the user releases the slider with the
297mouse.
298
299<h3 class=fn>int <a name="sliderStart"></a>QScrollBar::sliderStart () const
300</h3>
301
302<p> Returns the pixel position where the scroll bar slider starts.
303<p> This is equivalent to <a href="#sliderRect">sliderRect</a>().<a href="qwidget.html#y">y</a>() for vertical scroll bars or
304sliderRect().<a href="qwidget.html#x">x</a>() for horizontal scroll bars.
305
306<h3 class=fn>bool <a name="tracking"></a>QScrollBar::tracking () const
307</h3><p>Returns TRUE if scroll bar tracking is enabled; otherwise returns FALSE.
308See the <a href="qscrollbar.html#tracking-prop">"tracking"</a> property for details.
309<h3 class=fn>int <a name="value"></a>QScrollBar::value () const
310</h3><p>Returns the scroll bar's value.
311See the <a href="qscrollbar.html#value-prop">"value"</a> property for details.
312<h3 class=fn>void <a name="valueChanged"></a>QScrollBar::valueChanged ( int&nbsp;value )<tt> [signal]</tt>
313</h3>
314
315<p> This signal is emitted when the scroll bar value has changed, with
316the new scroll bar <em>value</em> as an argument.
317
318<hr><h2>Property Documentation</h2>
319<h3 class=fn>bool <a name="draggingSlider-prop"></a>draggingSlider</h3>
320<p>This property holds whether the user has clicked the mouse on the slider and is currently dragging it.
321<p>
322<p>Get this property's value with <a href="#draggingSlider">draggingSlider</a>().
323<h3 class=fn>int <a name="lineStep-prop"></a>lineStep</h3>
324<p>This property holds the line step.
325<p>When setting lineStep, the virtual <a href="qrangecontrol.html#stepChange">stepChange</a>() function will be
326called if the new line step is different from the previous
327setting.
328<p> <p>See also <a href="qrangecontrol.html#setSteps">setSteps</a>(), <a href="qrangecontrol.html#pageStep">QRangeControl::pageStep</a>(), and <a href="qrangecontrol.html#setRange">setRange</a>().
329
330<p>Set this property's value with <a href="#setLineStep">setLineStep</a>() and get this property's value with <a href="#lineStep">lineStep</a>().
331<h3 class=fn>int <a name="maxValue-prop"></a>maxValue</h3>
332<p>This property holds the scroll bar's maximum value.
333<p>When setting this property, the <a href="#minValue-prop">QScrollBar::minValue</a> is
334adjusted if necessary to ensure that the range remains valid.
335<p> <p>See also <a href="qrangecontrol.html#setRange">setRange</a>().
336
337<p>Set this property's value with <a href="#setMaxValue">setMaxValue</a>() and get this property's value with <a href="#maxValue">maxValue</a>().
338<h3 class=fn>int <a name="minValue-prop"></a>minValue</h3>
339<p>This property holds the scroll bar's minimum value.
340<p>When setting this property, the <a href="#maxValue-prop">QScrollBar::maxValue</a> is
341adjusted if necessary to ensure that the range remains valid.
342<p> <p>See also <a href="qrangecontrol.html#setRange">setRange</a>().
343
344<p>Set this property's value with <a href="#setMinValue">setMinValue</a>() and get this property's value with <a href="#minValue">minValue</a>().
345<h3 class=fn><a href="qt.html#Orientation-enum">Orientation</a> <a name="orientation-prop"></a>orientation</h3>
346<p>This property holds the orientation of the scroll bar.
347<p>The orientation must be <a href="qt.html#Orientation-enum">Qt::Vertical</a> (the default) or <a href="qt.html#Orientation-enum">Qt::Horizontal</a>.
348
349<p>Set this property's value with <a href="#setOrientation">setOrientation</a>() and get this property's value with <a href="#orientation">orientation</a>().
350<h3 class=fn>int <a name="pageStep-prop"></a>pageStep</h3>
351<p>This property holds the page step.
352<p>When setting pageStep, the virtual <a href="qrangecontrol.html#stepChange">stepChange</a>() function will be
353called if the new page step is different from the previous
354setting.
355<p> <p>See also <a href="qrangecontrol.html#setSteps">QRangeControl::setSteps</a>(), <a href="#lineStep-prop">lineStep</a>, and <a href="qrangecontrol.html#setRange">setRange</a>().
356
357<p>Set this property's value with <a href="#setPageStep">setPageStep</a>() and get this property's value with <a href="#pageStep">pageStep</a>().
358<h3 class=fn>bool <a name="tracking-prop"></a>tracking</h3>
359<p>This property holds whether scroll bar tracking is enabled.
360<p>If tracking is enabled (the default), the scroll bar emits the
361<a href="#valueChanged">valueChanged</a>() signal while the slider is being dragged. If
362tracking is disabled, the scroll bar emits the valueChanged()
363signal only when the user releases the mouse button after moving
364the slider.
365
366<p>Set this property's value with <a href="#setTracking">setTracking</a>() and get this property's value with <a href="#tracking">tracking</a>().
367<h3 class=fn>int <a name="value-prop"></a>value</h3>
368<p>This property holds the scroll bar's value.
369<p>Set this property's value with <a href="#setValue">setValue</a>() and get this property's value with <a href="#value">value</a>().
370<p><p>See also <a href="qrangecontrol.html#value">QRangeControl::value</a>() and <a href="qrangecontrol.html#prevValue">prevValue</a>().
371
372<!-- eof -->
373<hr><p>
374This file is part of the <a href="index.html">Qt toolkit</a>.
375Copyright &copy; 1995-2007
376<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
377<table width=100% cellspacing=0 border=0><tr>
378<td>Copyright &copy; 2007
379<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
380<td align=right><div align=right>Qt 3.3.8</div>
381</table></div></address></body>
382</html>
Note: See TracBrowser for help on using the repository browser.