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116 lines
2.6 KiB
116 lines
2.6 KiB
15 years ago
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/***************************************************************************
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* $Id$
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**
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* Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
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**
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* This file is part of an example program for Qt. 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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import org.kde.qt.*;
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import java.util.Date;
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import java.text.*;
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class DigitalClock extends QLCDNumber // digital clock widget
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{
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private boolean showingColon;
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private int normalTimer;
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private int showDateTimer;
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DigitalClock( )
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{
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this(null, null);
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}
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//
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// Constructs a DigitalClock widget with a parent and a name.
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//
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DigitalClock( QWidget parent )
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{
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this(parent, null);
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}
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DigitalClock( QWidget parent, String name )
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{
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super( parent, name );
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showingColon = false;
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setFrameStyle( QFrame.Panel | QFrame.Raised );
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setLineWidth( 2 ); // set frame line width
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showTime(); // display the current time
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normalTimer = startTimer( 500 ); // 1/2 second timer events
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showDateTimer = -1; // not showing date
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}
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//
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// Handles timer events for the digital clock widget.
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// There are two different timers; one timer for updating the clock
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// and another one for switching back from date mode to time mode.
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//
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protected void timerEvent( QTimerEvent e )
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{
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if ( e.timerId() == showDateTimer ) // stop showing date
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stopDate();
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else { // normal timer
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if ( showDateTimer == -1 ) // not showing date
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showTime();
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}
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}
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//
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// Enters date mode when the left mouse button is pressed.
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//
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protected void mousePressEvent( QMouseEvent e )
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{
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if ( e.button() == QMouseEvent.LeftButton ) // left button pressed
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showDate();
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}
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//
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// Shows the current date in the internal lcd widget.
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// Fires a timer to stop showing the date.
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//
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void showDate()
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{
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if ( showDateTimer != -1 ) // already showing date
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return;
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// Java always prints at least two digits for the year
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DateFormat dateFormat = new SimpleDateFormat( "yy d" );
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String s = dateFormat.format(new Date());
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display( s ); // sets the LCD number/text
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showDateTimer = startTimer( 2000 ); // keep this state for 2 secs
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}
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//
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// Stops showing the date.
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//
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void stopDate()
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{
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killTimer( showDateTimer );
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showDateTimer = -1;
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showTime();
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}
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//
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// Shows the current time in the internal lcd widget.
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//
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void showTime()
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{
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showingColon = !showingColon; // toggle/blink colon
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DateFormat timeFormat = new SimpleDateFormat( (showingColon ? "HH:mm": "HH mm") );
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String s = timeFormat.format(new Date());
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display( s ); // set LCD number/text
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}
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}
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