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280 lines
11 KiB
280 lines
11 KiB
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/aclock/aclock.doc:4 -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Analog Clock</title>
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<body>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<td valign=center>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Main Classes</font></a>
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<font color="#004faf">Functions</font></a>
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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>Analog Clock</h1>
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<p>
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This example displays an analog clock widget.
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<p> <hr>
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<p> Header file:
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<p> <pre>/****************************************************************************
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** $Id: qt/aclock.h 3.3.8 edited Jan 11 14:36 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#ifndef ACLOCK_H
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#define ACLOCK_H
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#include <<a href="qwidget-h.html">ntqwidget.h</a>>
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#include <<a href="qdatetime-h.html">ntqdatetime.h</a>>
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class TQTimer;
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class AnalogClock : public <a href="ntqwidget.html">TQWidget</a> // analog clock widget
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{
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<a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a>
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public:
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AnalogClock( <a href="ntqwidget.html">TQWidget</a> *parent=0, const char *name=0 );
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void setAutoMask(bool b);
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protected:
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void updateMask();
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void paintEvent( <a href="qpaintevent.html">TQPaintEvent</a> *);
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void mousePressEvent( <a href="qmouseevent.html">TQMouseEvent</a> *);
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void mouseMoveEvent( <a href="qmouseevent.html">TQMouseEvent</a> *);
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void drawClock( <a href="ntqpainter.html">TQPainter</a>* );
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private slots:
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void timeout();
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public slots:
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void setTime( const <a href="qtime.html">TQTime</a> & t );
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private:
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<a href="ntqpoint.html">TQPoint</a> clickPos;
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<a href="qtime.html">TQTime</a> time;
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<a href="ntqtimer.html">TQTimer</a> *internalTimer;
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};
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#endif // ACLOCK_H
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</pre>
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<p> <hr>
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<p> Implementation:
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<p> <pre>/****************************************************************************
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** $Id: qt/aclock.cpp 3.3.8 edited Jan 11 14:36 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "aclock.h"
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#include <<a href="qtimer-h.html">ntqtimer.h</a>>
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#include <<a href="qpainter-h.html">ntqpainter.h</a>>
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#include <<a href="qbitmap-h.html">ntqbitmap.h</a>>
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//
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// Constructs an analog clock widget that uses an internal TQTimer.
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//
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<a name="f384"></a>AnalogClock::AnalogClock( <a href="ntqwidget.html">TQWidget</a> *parent, const char *name )
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: <a href="ntqwidget.html">TQWidget</a>( parent, name )
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{
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<a name="x1201"></a> time = TQTime::<a href="qtime.html#currentTime">currentTime</a>(); // get current time
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internalTimer = new <a href="ntqtimer.html">TQTimer</a>( this ); // create internal timer
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<a name="x1205"></a> <a href="ntqobject.html#connect">connect</a>( internalTimer, TQ_SIGNAL(<a href="ntqtimer.html#timeout">timeout</a>()), TQ_SLOT(timeout()) );
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<a name="x1204"></a> internalTimer-><a href="ntqtimer.html#start">start</a>( 5000 ); // emit signal every 5 seconds
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}
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void AnalogClock::<a href="ntqwidget.html#mousePressEvent">mousePressEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> *e )
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{
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if(<a href="ntqwidget.html#isTopLevel">isTopLevel</a>())
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clickPos = e-><a href="qmouseevent.html#pos">pos</a>() + TQPoint(<a href="ntqwidget.html#geometry">geometry</a>().topLeft() - frameGeometry().topLeft());
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}
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<a name="x1206"></a>void AnalogClock::<a href="ntqwidget.html#mouseMoveEvent">mouseMoveEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> *e )
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{
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if(<a href="ntqwidget.html#isTopLevel">isTopLevel</a>())
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<a name="x1181"></a> <a href="ntqwidget.html#move">move</a>( e-><a href="qmouseevent.html#globalPos">globalPos</a>() - clickPos );
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}
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//
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// The TQTimer::timeout() signal is received by this slot.
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//
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//
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// When we set an explicit time we don't want the timeout() slot to be
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// called anymore as this relies on currentTime()
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//
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void <a name="f385"></a>AnalogClock::setTime( const <a href="qtime.html">TQTime</a> & t )
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{
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time = t;
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<a href="ntqobject.html#disconnect">disconnect</a>( internalTimer, TQ_SIGNAL(<a href="ntqtimer.html#timeout">timeout</a>()), this, TQ_SLOT(timeout()) );
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if (<a href="ntqwidget.html#autoMask">autoMask</a>())
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<a href="ntqwidget.html#updateMask">updateMask</a>();
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else
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<a href="ntqwidget.html#update">update</a>();
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}
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void <a name="f386"></a>AnalogClock::timeout()
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{
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<a href="qtime.html">TQTime</a> old_time = time;
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time = TQTime::<a href="qtime.html#currentTime">currentTime</a>();
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<a name="x1203"></a> if ( old_time.<a href="qtime.html#minute">minute</a>() != time.minute()
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<a name="x1202"></a> || old_time.<a href="qtime.html#hour">hour</a>() != time.hour() ) { // minute or hour has changed
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if (<a href="ntqwidget.html#autoMask">autoMask</a>())
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<a href="ntqwidget.html#updateMask">updateMask</a>();
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else
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<a href="ntqwidget.html#update">update</a>();
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}
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}
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void AnalogClock::<a href="ntqwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">TQPaintEvent</a> * )
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{
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if ( <a href="ntqwidget.html#autoMask">autoMask</a>() )
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return;
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<a href="ntqpainter.html">TQPainter</a> paint( this );
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<a name="x1190"></a> paint.<a href="ntqpainter.html#setBrush">setBrush</a>( <a href="ntqwidget.html#colorGroup">colorGroup</a>().foreground() );
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drawClock( &paint );
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}
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// If the clock is transparent, we use updateMask()
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// instead of paintEvent()
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void AnalogClock::updateMask() // paint clock mask
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{
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<a href="ntqbitmap.html">TQBitmap</a> bm( <a href="ntqwidget.html#size">size</a>() );
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bm.<a href="ntqpixmap.html#fill">fill</a>( color0 ); //transparent
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<a href="ntqpainter.html">TQPainter</a> paint;
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<a name="x1183"></a> paint.<a href="ntqpainter.html#begin">begin</a>( &bm, this );
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paint.<a href="ntqpainter.html#setBrush">setBrush</a>( color1 ); // use non-transparent color
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paint.<a href="ntqpainter.html#setPen">setPen</a>( color1 );
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drawClock( &paint );
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<a name="x1186"></a> paint.<a href="ntqpainter.html#end">end</a>();
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<a href="ntqwidget.html#setMask">setMask</a>( bm );
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}
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//
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// The clock is painted using a 1000x1000 square coordinate system, in
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// the a centered square, as big as possible. The painter's pen and
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// brush colors are used.
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//
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void <a name="f387"></a>AnalogClock::drawClock( <a href="ntqpainter.html">TQPainter</a> *paint )
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{
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<a name="x1189"></a> paint-><a href="ntqpainter.html#save">save</a>();
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<a name="x1193"></a> paint-><a href="ntqpainter.html#setWindow">setWindow</a>( -500,-500, 1000,1000 );
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<a name="x1194"></a> <a href="ntqrect.html">TQRect</a> v = paint-><a href="ntqpainter.html#viewport">viewport</a>();
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int d = TQMIN( v.<a href="ntqrect.html#width">width</a>(), v.<a href="ntqrect.html#height">height</a>() );
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<a name="x1198"></a><a name="x1192"></a> paint-><a href="ntqpainter.html#setViewport">setViewport</a>( v.<a href="ntqrect.html#left">left</a>() + (v.<a href="ntqrect.html#width">width</a>()-d)/2,
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<a name="x1199"></a> v.<a href="ntqrect.html#top">top</a>() + (v.<a href="ntqrect.html#height">height</a>()-d)/2, d, d );
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<a href="ntqpointarray.html">TQPointArray</a> pts;
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paint-><a href="ntqpainter.html#save">save</a>();
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<a name="x1188"></a> paint-><a href="ntqpainter.html#rotate">rotate</a>( 30*(time.hour()%12-3) + time.minute()/2 );
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<a name="x1196"></a> pts.setPoints( 4, -20,0, 0,-20, 300,0, 0,20 );
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<a name="x1184"></a> paint-><a href="ntqpainter.html#drawConvexPolygon">drawConvexPolygon</a>( pts );
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<a name="x1187"></a> paint-><a href="ntqpainter.html#restore">restore</a>();
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paint-><a href="ntqpainter.html#save">save</a>();
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paint-><a href="ntqpainter.html#rotate">rotate</a>( (time.minute()-15)*6 );
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pts.setPoints( 4, -10,0, 0,-10, 400,0, 0,10 );
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paint-><a href="ntqpainter.html#drawConvexPolygon">drawConvexPolygon</a>( pts );
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paint-><a href="ntqpainter.html#restore">restore</a>();
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for ( int i=0; i<12; i++ ) {
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<a name="x1185"></a> paint-><a href="ntqpainter.html#drawLine">drawLine</a>( 440,0, 460,0 );
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paint-><a href="ntqpainter.html#rotate">rotate</a>( 30 );
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}
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paint-><a href="ntqpainter.html#restore">restore</a>();
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}
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<a name="x1209"></a>void AnalogClock::<a href="ntqwidget.html#setAutoMask">setAutoMask</a>(bool b)
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{
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if (b)
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<a href="ntqwidget.html#setBackgroundMode">setBackgroundMode</a>( PaletteForeground );
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else
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<a href="ntqwidget.html#setBackgroundMode">setBackgroundMode</a>( PaletteBackground );
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TQWidget::<a href="ntqwidget.html#setAutoMask">setAutoMask</a>(b);
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}
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</pre>
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<p> <hr>
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<p> Main:
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<p> <pre>/****************************************************************************
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** $Id: qt/main.cpp 3.3.8 edited Jan 11 14:36 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "aclock.h"
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#include <<a href="qapplication-h.html">ntqapplication.h</a>>
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int main( int argc, char **argv )
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{
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<a href="ntqapplication.html">TQApplication</a> a( argc, argv );
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AnalogClock *clock = new AnalogClock;
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if ( argc == 2 && strcmp( argv[1], "-transparent" ) == 0 )
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<a name="x1213"></a> clock-><a href="ntqwidget.html#setAutoMask">setAutoMask</a>( TRUE );
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<a name="x1212"></a> clock-><a href="ntqwidget.html#resize">resize</a>( 100, 100 );
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a.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>( clock );
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<a name="x1214"></a> clock-><a href="ntqwidget.html#setCaption">setCaption</a>("TQt Example - Analog Clock");
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<a name="x1215"></a> clock-><a href="ntqwidget.html#show">show</a>();
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int result = a.<a href="ntqapplication.html#exec">exec</a>();
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delete clock;
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return result;
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}
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</pre>
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<p>See also <a href="examples.html">Examples</a>.
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<!-- eof -->
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<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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</table></div></address></body>
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