From bd0f3345a938b35ce6a12f6150373b0955b8dd12 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Sun, 10 Jul 2011 15:24:15 -0500 Subject: Add Qt3 development HEAD version --- doc/html/aclock-example.html | 279 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 279 insertions(+) create mode 100644 doc/html/aclock-example.html (limited to 'doc/html/aclock-example.html') diff --git a/doc/html/aclock-example.html b/doc/html/aclock-example.html new file mode 100644 index 0000000..2c77d72 --- /dev/null +++ b/doc/html/aclock-example.html @@ -0,0 +1,279 @@ + + + + + +Analog Clock + + + + + + + +

Analog Clock

+ + +

+This example displays an analog clock widget. +

Header file: +

/****************************************************************************
+** $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 Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#ifndef ACLOCK_H
+#define ACLOCK_H
+
+#include <qwidget.h>
+#include <qdatetime.h>
+
+class QTimer;
+class AnalogClock : public QWidget              // analog clock widget
+{
+    Q_OBJECT
+public:
+    AnalogClock( QWidget *parent=0, const char *name=0 );
+    void setAutoMask(bool b);
+
+protected:
+    void updateMask();
+    void paintEvent( QPaintEvent *);
+    void mousePressEvent( QMouseEvent *);
+    void mouseMoveEvent( QMouseEvent *);
+    void drawClock( QPainter* );
+
+private slots:
+    void timeout();
+
+public slots:
+    void setTime( const QTime & t );
+
+private:
+    QPoint clickPos;
+    QTime time;
+    QTimer *internalTimer;
+};
+
+
+#endif // ACLOCK_H
+

+ +

Implementation: +

/****************************************************************************
+** $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 Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include "aclock.h"
+#include <qtimer.h>
+#include <qpainter.h>
+#include <qbitmap.h>
+
+//
+// Constructs an analog clock widget that uses an internal QTimer.
+//
+
+AnalogClock::AnalogClock( QWidget *parent, const char *name )
+    : QWidget( parent, name )
+{
+    time = QTime::currentTime();                // get current time
+    internalTimer = new QTimer( this ); // create internal timer
+    connect( internalTimer, SIGNAL(timeout()), SLOT(timeout()) );
+    internalTimer->start( 5000 );               // emit signal every 5 seconds
+}
+
+void AnalogClock::mousePressEvent( QMouseEvent *e )
+{
+    if(isTopLevel())
+        clickPos = e->pos() + QPoint(geometry().topLeft() - frameGeometry().topLeft());
+}
+
+void AnalogClock::mouseMoveEvent( QMouseEvent *e )
+{
+    if(isTopLevel())
+        move( e->globalPos() - clickPos );
+}
+
+//
+// The QTimer::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 AnalogClock::setTime( const QTime & t )
+{
+    time = t;
+    disconnect( internalTimer, SIGNAL(timeout()), this, SLOT(timeout()) );
+    if (autoMask())
+        updateMask();
+    else
+        update();
+}
+
+
+void AnalogClock::timeout()
+{
+    QTime old_time = time;
+    time = QTime::currentTime();
+    if ( old_time.minute() != time.minute()
+        || old_time.hour() != time.hour() ) {   // minute or hour has changed
+        if (autoMask())
+            updateMask();
+        else
+            update();
+    }
+}
+
+
+void AnalogClock::paintEvent( QPaintEvent * )
+{
+    if ( autoMask() )
+        return;
+    QPainter paint( this );
+    paint.setBrush( colorGroup().foreground() );
+    drawClock( &paint );
+}
+
+// If the clock is transparent, we use updateMask()
+// instead of paintEvent()
+
+void AnalogClock::updateMask()  // paint clock mask
+{
+    QBitmap bm( size() );
+    bm.fill( color0 );                  //transparent
+
+    QPainter paint;
+    paint.begin( &bm, this );
+    paint.setBrush( color1 );           // use non-transparent color
+    paint.setPen( color1 );
+
+    drawClock( &paint );
+
+    paint.end();
+    setMask( 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 AnalogClock::drawClock( QPainter *paint )
+{
+    paint->save();
+
+    paint->setWindow( -500,-500, 1000,1000 );
+
+    QRect v = paint->viewport();
+    int d = QMIN( v.width(), v.height() );
+    paint->setViewport( v.left() + (v.width()-d)/2,
+                        v.top() + (v.height()-d)/2, d, d );
+
+    QPointArray pts;
+
+    paint->save();
+    paint->rotate( 30*(time.hour()%12-3) + time.minute()/2 );
+    pts.setPoints( 4, -20,0,  0,-20, 300,0, 0,20 );
+    paint->drawConvexPolygon( pts );
+    paint->restore();
+
+    paint->save();
+    paint->rotate( (time.minute()-15)*6 );
+    pts.setPoints( 4, -10,0, 0,-10, 400,0, 0,10 );
+    paint->drawConvexPolygon( pts );
+    paint->restore();
+
+    for ( int i=0; i<12; i++ ) {
+        paint->drawLine( 440,0, 460,0 );
+        paint->rotate( 30 );
+    }
+
+    paint->restore();
+}
+
+
+void AnalogClock::setAutoMask(bool b)
+{
+    if (b)
+        setBackgroundMode( PaletteForeground );
+    else
+        setBackgroundMode( PaletteBackground );
+    QWidget::setAutoMask(b);
+}
+

+ +

Main: +

/****************************************************************************
+** $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 Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include "aclock.h"
+#include <qapplication.h>
+
+
+int main( int argc, char **argv )
+{
+    QApplication a( argc, argv );
+    AnalogClock *clock = new AnalogClock;
+    if ( argc == 2 && strcmp( argv[1], "-transparent" ) == 0 )
+        clock->setAutoMask( TRUE );
+    clock->resize( 100, 100 );
+    a.setMainWidget( clock );
+    clock->setCaption("Qt Example - Analog Clock");
+    clock->show();
+    int result = a.exec();
+    delete clock;
+    return result;
+}
+

+ +