author | zecke <zecke> | 2004-08-22 23:17:08 (UTC) |
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committer | zecke <zecke> | 2004-08-22 23:17:08 (UTC) |
commit | a1cb5750328eb4e6d232568c5cc5b8ba7ef99eb5 (patch) (side-by-side diff) | |
tree | 49a955d1eb6e44f9acd8c82908928082fd067409 /noncore/tools/clock/analogclock.cpp | |
parent | 3f4e6c92a607424e0af2c551525a2e4915fdc03e (diff) | |
download | opie-a1cb5750328eb4e6d232568c5cc5b8ba7ef99eb5.zip opie-a1cb5750328eb4e6d232568c5cc5b8ba7ef99eb5.tar.gz opie-a1cb5750328eb4e6d232568c5cc5b8ba7ef99eb5.tar.bz2 |
Buffer painting which is hopefully flicker free and it works
with Phase and Liquid Styles
Diffstat (limited to 'noncore/tools/clock/analogclock.cpp') (more/less context) (ignore whitespace changes)
-rw-r--r-- | noncore/tools/clock/analogclock.cpp | 112 |
1 files changed, 62 insertions, 50 deletions
diff --git a/noncore/tools/clock/analogclock.cpp b/noncore/tools/clock/analogclock.cpp index c5f0155..16ecc5c 100644 --- a/noncore/tools/clock/analogclock.cpp +++ b/noncore/tools/clock/analogclock.cpp @@ -11,124 +11,139 @@ ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ** See http://www.trolltech.com/gpl/ for GPL licensing information. ** ** Contact info@trolltech.com if any conditions of this licensing are ** not clear to you. ** **********************************************************************/ #include "analogclock.h" +#include <qtopia/global.h> + #include <qlayout.h> #include <qpainter.h> -#include <qtopia/global.h> +#include <qpixmap.h> + #include <math.h> const double deg2rad = 0.017453292519943295769; // pi/180 AnalogClock::AnalogClock( QWidget *parent, const char *name ) - : QFrame( parent, name ), clear(false) + : QFrame( parent, name ) { setMinimumSize(50,50); + + /* initial the buffer pixmap */ + QRect r = contentsRect(); + _pixmap = new QPixmap( r.width(), r.height() ); +} + +AnalogClock::~AnalogClock() { + delete _pixmap; } QSizePolicy AnalogClock::sizePolicy() const { return QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding ); } -void AnalogClock::drawContents( QPainter *p ) +void AnalogClock::drawContents( QPainter * ) { -#if !defined(NO_DEBUG) - static bool first = true; - if ( first ) { -// QTOPIA_PROFILE("first paint event"); - first = false; - } -#endif + /* no need to draw... */ + if ( !isVisible() ) + return; + QRect r = contentsRect(); if ( r.width() < r.height() ) { r.setY( (r.height() - r.width())/2 ); r.setHeight( r.width() ); } + /* resize the buffer */ + if ( r.width() != _pixmap->width() || + r.height() != _pixmap->height() ) + _pixmap->resize( r.width(), r.height() ); + + QPainter p; + p.begin( _pixmap ); + + QPoint center( r.x() + r.width() / 2, r.y() + r.height() / 2 ); const int w_tick = r.width()/300+1; const int w_sec = r.width()/400+1; const int w_hour = r.width()/80+1; QPoint l1( r.x() + r.width() / 2, r.y() + 2 ); QPoint l2( r.x() + r.width() / 2, r.y() + 8 ); QPoint h1( r.x() + r.width() / 2, r.y() + r.height() / 4 ); QPoint h2( r.x() + r.width() / 2, r.y() + r.height() / 2 ); QPoint m1( r.x() + r.width() / 2, r.y() + r.height() / 9 ); QPoint m2( r.x() + r.width() / 2, r.y() + r.height() / 2 ); QPoint s1( r.x() + r.width() / 2, r.y() + 8 ); QPoint s2( r.x() + r.width() / 2, r.y() + r.height() / 2 ); - QColor color( clear ? backgroundColor() : black ); - QTime time = clear ? prevTime : currTime; + /* fill the pixmap */ + _pixmap->fill( this, 0, 0 ); - if ( clear && prevTime.secsTo(currTime) > 1 ) { - p->eraseRect( rect() ); - return; - } - if ( !clear ) { - // draw ticks - p->setPen( QPen( color, w_tick ) ); - for ( int i = 0; i < 12; i++ ) - p->drawLine( rotate( center, l1, i * 30 ), rotate( center, l2, i * 30 ) ); - } + // draw ticks + QColor color = black; + p.setPen( QPen( color, w_tick ) ); + for ( int i = 0; i < 12; i++ ) + p.drawLine( rotate( center, l1, i * 30 ), rotate( center, l2, i * 30 ) ); - if ( !clear || prevTime.minute() != currTime.minute() || - prevTime.hour() != currTime.hour() ) { - // draw hour pointer - h1 = rotate( center, h1, 30 * ( time.hour() % 12 ) + time.minute() / 2 ); - h2 = rotate( center, h2, 30 * ( time.hour() % 12 ) + time.minute() / 2 ); - p->setPen( color ); - p->setBrush( color ); - drawHand( p, h1, h2 ); - } - if ( !clear || prevTime.minute() != currTime.minute() ) { - // draw minute pointer - m1 = rotate( center, m1, time.minute() * 6 ); - m2 = rotate( center, m2, time.minute() * 6 ); - p->setPen( color ); - p->setBrush( color ); - drawHand( p, m1, m2 ); - } + // draw hour pointer + h1 = rotate( center, h1, 30 * ( currTime.hour() % 12 ) + currTime.minute() / 2 ); + h2 = rotate( center, h2, 30 * ( currTime.hour() % 12 ) + currTime.minute() / 2 ); + p.setPen( color ); + p.setBrush( color ); + drawHand( &p, h1, h2 ); + + + // draw minute pointer + m1 = rotate( center, m1, currTime.minute() * 6 ); + m2 = rotate( center, m2, currTime.minute() * 6 ); + p.setPen( color ); + p.setBrush( color ); + drawHand( &p, m1, m2 ); // draw second pointer - s1 = rotate( center, s1, time.second() * 6 ); - s2 = rotate( center, s2, time.second() * 6 ); - p->setPen( QPen( color, w_sec ) ); - p->drawLine( s1, s2 ); + s1 = rotate( center, s1, currTime.second() * 6 ); + s2 = rotate( center, s2, currTime.second() * 6 ); + p.setPen( QPen( color, w_sec ) ); + p.drawLine( s1, s2 ); // cap - p->setBrush(color); - p->drawEllipse( center.x()-w_hour/2, center.y()-w_hour/2, w_hour, w_hour ); + p.setBrush(color); + p.drawEllipse( center.x()-w_hour/2, center.y()-w_hour/2, w_hour, w_hour ); + + prevTime = currTime; + + p.end(); - if ( !clear ) - prevTime = currTime; + p.begin( this ); + p.drawPixmap( 0, 0, *_pixmap ); + + /* leave */ } // Dijkstra's bisection algorithm to find the square root as an integer. static uint int_sqrt(uint n) { if ( n >= UINT_MAX>>2 ) // n must be in the range 0...UINT_MAX/2-1 return 2*int_sqrt( n/4 ); uint h, p= 0, q= 1, r= n; while ( q <= n ) q <<= 2; while ( q != 1 ) { @@ -177,27 +192,24 @@ void AnalogClock::drawHand( QPainter *p, QPoint p1, QPoint p2 ) QPointArray pa(4); pa[0] = p1; pa[1] = QPoint( p2.x()+iy, p2.y()-nix ); pa[2] = QPoint( p2.x()-niy, p2.y()+ix ); pa[3] = p1; p->drawPolygon( pa ); } void AnalogClock::display( const QTime& t ) { currTime = t; - clear = true; - repaint( false ); - clear = false; repaint( false ); } QPoint AnalogClock::rotate( QPoint c, QPoint p, int a ) { double angle = deg2rad * ( - a + 180 ); double nx = c.x() - ( p.x() - c.x() ) * cos( angle ) - ( p.y() - c.y() ) * sin( angle ); double ny = c.y() - ( p.y() - c.y() ) * cos( angle ) + ( p.x() - c.x() ) * sin( angle ); return QPoint( int(nx), int(ny) ); } |