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+<!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/examples/aclock/aclock.doc:4 -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>Analog Clock</title>
+<style type="text/css"><!--
+fn { margin-left: 1cm; text-indent: -1cm; }
+a:link { color: #004faf; text-decoration: none }
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+--></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&nbsp;Classes</font></a>
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+<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>Analog Clock</h1>
+
+
+<p>
+This example displays an analog clock widget.
+<p> <hr>
+<p> Header file:
+<p> <pre>/****************************************************************************
+** $Id: qt/aclock.h 3.3.8 edited Jan 11 14:36 $
+**
+** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
+**
+** This file is part of an example program for TQt. This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#ifndef ACLOCK_H
+#define ACLOCK_H
+
+#include &lt;<a href="qwidget-h.html">qwidget.h</a>&gt;
+#include &lt;<a href="qdatetime-h.html">qdatetime.h</a>&gt;
+
+class TQTimer;
+class AnalogClock : public <a href="qwidget.html">TQWidget</a> // analog clock widget
+{
+ <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
+public:
+ AnalogClock( <a href="qwidget.html">TQWidget</a> *parent=0, const char *name=0 );
+ void setAutoMask(bool b);
+
+protected:
+ void updateMask();
+ void paintEvent( <a href="qpaintevent.html">TQPaintEvent</a> *);
+ void mousePressEvent( <a href="qmouseevent.html">TQMouseEvent</a> *);
+ void mouseMoveEvent( <a href="qmouseevent.html">TQMouseEvent</a> *);
+ void drawClock( <a href="qpainter.html">TQPainter</a>* );
+
+private slots:
+ void timeout();
+
+public slots:
+ void setTime( const <a href="qtime.html">TQTime</a> &amp; t );
+
+private:
+ <a href="qpoint.html">TQPoint</a> clickPos;
+ <a href="qtime.html">TQTime</a> time;
+ <a href="qtimer.html">TQTimer</a> *internalTimer;
+};
+
+
+#endif // ACLOCK_H
+</pre>
+
+<p> <hr>
+<p> Implementation:
+<p> <pre>/****************************************************************************
+** $Id: qt/aclock.cpp 3.3.8 edited Jan 11 14:36 $
+**
+** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
+**
+** This file is part of an example program for TQt. This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include "aclock.h"
+#include &lt;<a href="qtimer-h.html">qtimer.h</a>&gt;
+#include &lt;<a href="qpainter-h.html">qpainter.h</a>&gt;
+#include &lt;<a href="qbitmap-h.html">qbitmap.h</a>&gt;
+
+//
+// Constructs an analog clock widget that uses an internal TQTimer.
+//
+
+<a name="f384"></a>AnalogClock::AnalogClock( <a href="qwidget.html">TQWidget</a> *parent, const char *name )
+ : <a href="qwidget.html">TQWidget</a>( parent, name )
+{
+<a name="x1201"></a> time = TQTime::<a href="qtime.html#currentTime">currentTime</a>(); // get current time
+ internalTimer = new <a href="qtimer.html">TQTimer</a>( this ); // create internal timer
+<a name="x1205"></a> <a href="qobject.html#connect">connect</a>( internalTimer, SIGNAL(<a href="qtimer.html#timeout">timeout</a>()), SLOT(timeout()) );
+<a name="x1204"></a> internalTimer-&gt;<a href="qtimer.html#start">start</a>( 5000 ); // emit signal every 5 seconds
+}
+
+void AnalogClock::<a href="qwidget.html#mousePressEvent">mousePressEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> *e )
+{
+ if(<a href="qwidget.html#isTopLevel">isTopLevel</a>())
+ clickPos = e-&gt;<a href="qmouseevent.html#pos">pos</a>() + TQPoint(<a href="qwidget.html#geometry">geometry</a>().topLeft() - frameGeometry().topLeft());
+}
+
+<a name="x1206"></a>void AnalogClock::<a href="qwidget.html#mouseMoveEvent">mouseMoveEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> *e )
+{
+ if(<a href="qwidget.html#isTopLevel">isTopLevel</a>())
+<a name="x1181"></a> <a href="qwidget.html#move">move</a>( e-&gt;<a href="qmouseevent.html#globalPos">globalPos</a>() - clickPos );
+}
+
+//
+// The TQTimer::timeout() signal is received by this slot.
+//
+
+//
+// When we set an explicit time we don't want the timeout() slot to be
+// called anymore as this relies on currentTime()
+//
+void <a name="f385"></a>AnalogClock::setTime( const <a href="qtime.html">TQTime</a> &amp; t )
+{
+ time = t;
+ <a href="qobject.html#disconnect">disconnect</a>( internalTimer, SIGNAL(<a href="qtimer.html#timeout">timeout</a>()), this, SLOT(timeout()) );
+ if (<a href="qwidget.html#autoMask">autoMask</a>())
+ <a href="qwidget.html#updateMask">updateMask</a>();
+ else
+ <a href="qwidget.html#update">update</a>();
+}
+
+
+void <a name="f386"></a>AnalogClock::timeout()
+{
+ <a href="qtime.html">TQTime</a> old_time = time;
+ time = TQTime::<a href="qtime.html#currentTime">currentTime</a>();
+<a name="x1203"></a> if ( old_time.<a href="qtime.html#minute">minute</a>() != time.minute()
+<a name="x1202"></a> || old_time.<a href="qtime.html#hour">hour</a>() != time.hour() ) { // minute or hour has changed
+ if (<a href="qwidget.html#autoMask">autoMask</a>())
+ <a href="qwidget.html#updateMask">updateMask</a>();
+ else
+ <a href="qwidget.html#update">update</a>();
+ }
+}
+
+
+void AnalogClock::<a href="qwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">TQPaintEvent</a> * )
+{
+ if ( <a href="qwidget.html#autoMask">autoMask</a>() )
+ return;
+ <a href="qpainter.html">TQPainter</a> paint( this );
+<a name="x1190"></a> paint.<a href="qpainter.html#setBrush">setBrush</a>( <a href="qwidget.html#colorGroup">colorGroup</a>().foreground() );
+ drawClock( &amp;paint );
+}
+
+// If the clock is transparent, we use updateMask()
+// instead of paintEvent()
+
+void AnalogClock::updateMask() // paint clock mask
+{
+ <a href="qbitmap.html">TQBitmap</a> bm( <a href="qwidget.html#size">size</a>() );
+ bm.<a href="qpixmap.html#fill">fill</a>( color0 ); //transparent
+
+ <a href="qpainter.html">TQPainter</a> paint;
+<a name="x1183"></a> paint.<a href="qpainter.html#begin">begin</a>( &amp;bm, this );
+ paint.<a href="qpainter.html#setBrush">setBrush</a>( color1 ); // use non-transparent color
+ paint.<a href="qpainter.html#setPen">setPen</a>( color1 );
+
+ drawClock( &amp;paint );
+
+<a name="x1186"></a> paint.<a href="qpainter.html#end">end</a>();
+ <a href="qwidget.html#setMask">setMask</a>( bm );
+}
+
+//
+// The clock is painted using a 1000x1000 square coordinate system, in
+// the a centered square, as big as possible. The painter's pen and
+// brush colors are used.
+//
+void <a name="f387"></a>AnalogClock::drawClock( <a href="qpainter.html">TQPainter</a> *paint )
+{
+<a name="x1189"></a> paint-&gt;<a href="qpainter.html#save">save</a>();
+
+<a name="x1193"></a> paint-&gt;<a href="qpainter.html#setWindow">setWindow</a>( -500,-500, 1000,1000 );
+
+<a name="x1194"></a> <a href="qrect.html">TQRect</a> v = paint-&gt;<a href="qpainter.html#viewport">viewport</a>();
+ int d = TQMIN( v.<a href="qrect.html#width">width</a>(), v.<a href="qrect.html#height">height</a>() );
+<a name="x1198"></a><a name="x1192"></a> paint-&gt;<a href="qpainter.html#setViewport">setViewport</a>( v.<a href="qrect.html#left">left</a>() + (v.<a href="qrect.html#width">width</a>()-d)/2,
+<a name="x1199"></a> v.<a href="qrect.html#top">top</a>() + (v.<a href="qrect.html#height">height</a>()-d)/2, d, d );
+
+ <a href="qpointarray.html">TQPointArray</a> pts;
+
+ paint-&gt;<a href="qpainter.html#save">save</a>();
+<a name="x1188"></a> paint-&gt;<a href="qpainter.html#rotate">rotate</a>( 30*(time.hour()%12-3) + time.minute()/2 );
+<a name="x1196"></a> pts.setPoints( 4, -20,0, 0,-20, 300,0, 0,20 );
+<a name="x1184"></a> paint-&gt;<a href="qpainter.html#drawConvexPolygon">drawConvexPolygon</a>( pts );
+<a name="x1187"></a> paint-&gt;<a href="qpainter.html#restore">restore</a>();
+
+ paint-&gt;<a href="qpainter.html#save">save</a>();
+ paint-&gt;<a href="qpainter.html#rotate">rotate</a>( (time.minute()-15)*6 );
+ pts.setPoints( 4, -10,0, 0,-10, 400,0, 0,10 );
+ paint-&gt;<a href="qpainter.html#drawConvexPolygon">drawConvexPolygon</a>( pts );
+ paint-&gt;<a href="qpainter.html#restore">restore</a>();
+
+ for ( int i=0; i&lt;12; i++ ) {
+<a name="x1185"></a> paint-&gt;<a href="qpainter.html#drawLine">drawLine</a>( 440,0, 460,0 );
+ paint-&gt;<a href="qpainter.html#rotate">rotate</a>( 30 );
+ }
+
+ paint-&gt;<a href="qpainter.html#restore">restore</a>();
+}
+
+
+<a name="x1209"></a>void AnalogClock::<a href="qwidget.html#setAutoMask">setAutoMask</a>(bool b)
+{
+ if (b)
+ <a href="qwidget.html#setBackgroundMode">setBackgroundMode</a>( PaletteForeground );
+ else
+ <a href="qwidget.html#setBackgroundMode">setBackgroundMode</a>( PaletteBackground );
+ TQWidget::<a href="qwidget.html#setAutoMask">setAutoMask</a>(b);
+}
+</pre>
+
+<p> <hr>
+<p> Main:
+<p> <pre>/****************************************************************************
+** $Id: qt/main.cpp 3.3.8 edited Jan 11 14:36 $
+**
+** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
+**
+** This file is part of an example program for TQt. This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include "aclock.h"
+#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
+
+
+int main( int argc, char **argv )
+{
+ <a href="qapplication.html">TQApplication</a> a( argc, argv );
+ AnalogClock *clock = new AnalogClock;
+ if ( argc == 2 &amp;&amp; strcmp( argv[1], "-transparent" ) == 0 )
+<a name="x1213"></a> clock-&gt;<a href="qwidget.html#setAutoMask">setAutoMask</a>( TRUE );
+<a name="x1212"></a> clock-&gt;<a href="qwidget.html#resize">resize</a>( 100, 100 );
+ a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( clock );
+<a name="x1214"></a> clock-&gt;<a href="qwidget.html#setCaption">setCaption</a>("TQt Example - Analog Clock");
+<a name="x1215"></a> clock-&gt;<a href="qwidget.html#show">show</a>();
+ int result = a.<a href="qapplication.html#exec">exec</a>();
+ delete clock;
+ return result;
+}
+</pre>
+
+<p>See also <a href="examples.html">Examples</a>.
+
+<!-- eof -->
+<p><address><hr><div align=center>
+<table width=100% cellspacing=0 border=0><tr>
+<td>Copyright &copy; 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>