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/***************************************************************************
* $Id$
**
* Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
**
* This file is part of an example program for Qt. This example
* program may be used, distributed and modified without limitation.
**
****************************************************************************/
import org.kde.qt.*;
import java.util.Date;
import java.text.*;
class DigitalClock extends QLCDNumber // digital clock widget
{
private boolean showingColon;
private int normalTimer;
private int showDateTimer;
DigitalClock( )
{
this(null, null);
}
//
// Constructs a DigitalClock widget with a parent and a name.
//
DigitalClock( QWidget parent )
{
this(parent, null);
}
DigitalClock( QWidget parent, String name )
{
super( parent, name );
showingColon = false;
setFrameStyle( QFrame.Panel | QFrame.Raised );
setLineWidth( 2 ); // set frame line width
showTime(); // display the current time
normalTimer = startTimer( 500 ); // 1/2 second timer events
showDateTimer = -1; // not showing date
}
//
// Handles timer events for the digital clock widget.
// There are two different timers; one timer for updating the clock
// and another one for switching back from date mode to time mode.
//
protected void timerEvent( QTimerEvent e )
{
if ( e.timerId() == showDateTimer ) // stop showing date
stopDate();
else { // normal timer
if ( showDateTimer == -1 ) // not showing date
showTime();
}
}
//
// Enters date mode when the left mouse button is pressed.
//
protected void mousePressEvent( QMouseEvent e )
{
if ( e.button() == QMouseEvent.LeftButton ) // left button pressed
showDate();
}
//
// Shows the current date in the internal lcd widget.
// Fires a timer to stop showing the date.
//
void showDate()
{
if ( showDateTimer != -1 ) // already showing date
return;
// Java always prints at least two digits for the year
DateFormat dateFormat = new SimpleDateFormat( "yy d" );
String s = dateFormat.format(new Date());
display( s ); // sets the LCD number/text
showDateTimer = startTimer( 2000 ); // keep this state for 2 secs
}
//
// Stops showing the date.
//
void stopDate()
{
killTimer( showDateTimer );
showDateTimer = -1;
showTime();
}
//
// Shows the current time in the internal lcd widget.
//
void showTime()
{
showingColon = !showingColon; // toggle/blink colon
DateFormat timeFormat = new SimpleDateFormat( (showingColon ? "HH:mm": "HH mm") );
String s = timeFormat.format(new Date());
display( s ); // set LCD number/text
}
}
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