1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
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>TQDial 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>TQDial Class Reference</h1>
<p>The TQDial 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">TQWidget</a> and <a href="qrangecontrol.html">TQRangeControl</a>.
<p><a href="qdial-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li class=fn><a href="#TQDial"><b>TQDial</b></a> ( TQWidget * parent = 0, const char * name = 0, WFlags f = 0 )</li>
<li class=fn><a href="#TQDial-2"><b>TQDial</b></a> ( int minValue, int maxValue, int pageStep, int value, TQWidget * parent = 0, const char * name = 0 )</li>
<li class=fn><a href="#~TQDial"><b>~TQDial</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 TQRect * cr = 0 )</li>
</ul>
<hr><a name="details"></a><h2>Detailed Description</h2>
<p> The TQDial class provides a rounded range control (like a speedometer or potentiometer).
<p>
<p> TQDial 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, TQDial 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, TQDial 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">TQRangeControl</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">TQScrollBar</a>, <a href="qspinbox.html">TQSpinBox</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="TQDial"></a>TQDial::TQDial ( <a href="qwidget.html">TQWidget</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">TQWidget</a> constructor. It has the default range of
a <a href="qrangecontrol.html">TQRangeControl</a>.
<h3 class=fn><a name="TQDial-2"></a>TQDial::TQDial ( int minValue, int maxValue, int pageStep, int value, <a href="qwidget.html">TQWidget</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="~TQDial"></a>TQDial::~TQDial ()
</h3>
Destroys the dial.
<h3 class=fn>void <a name="addLine"></a>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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">TQRangeControl</a>.
<h3 class=fn>void <a name="repaintScreen"></a>TQDial::repaintScreen ( const <a href="qrect.html">TQRect</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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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>TQDial::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">TQRangeControl</a>.
<h3 class=fn>void <a name="valueChanged"></a>TQDial::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>TQDial::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">TQRangeControl::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">TQDial::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">TQDial::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 TQDial 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">TQDial::minValue</a>..<a href="#maxValue-prop">TQDial::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">TQt 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>TQt 3.3.8</div>
</table></div></address></body>
</html>
|
