/********************************************************************** ** Copyright (C) 2000-2002 Trolltech AS. All rights reserved. ** ** This file is part of the Qtopia Environment. ** ** This file may be distributed and/or modified under the terms of the ** GNU General Public License version 2 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL included in the ** packaging of this file. ** ** 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 #include #include #include const double deg2rad = 0.017453292519943295769; // pi/180 AnalogClock::AnalogClock( QWidget *parent, const char *name ) : QFrame( parent, name ), clear(false) { setMinimumSize(50,50); } QSizePolicy AnalogClock::sizePolicy() const { return QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding ); } void AnalogClock::drawContents( QPainter *p ) { #if !defined(NO_DEBUG) static bool first = true; if ( first ) { QTOPIA_PROFILE("first paint event"); first = false; } #endif QRect r = contentsRect(); if ( r.width() < r.height() ) { r.setY( (r.height() - r.width())/2 ); r.setHeight( r.width() ); } 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; 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 ) ); } 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 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 ); // cap p->setBrush(color); p->drawEllipse( center.x()-w_hour/2, center.y()-w_hour/2, w_hour, w_hour ); if ( !clear ) prevTime = currTime; } // 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 ) { q >>= 2; h= p + q; p >>= 1; if ( r >= h ) { p += q; r -= h; } } return p; } void AnalogClock::drawHand( QPainter *p, QPoint p1, QPoint p2 ) { int hw = 7; if ( contentsRect().height() < 100 ) hw = 5; int dx = p2.x() - p1.x(); int dy = p2.y() - p1.y(); int w = dx*dx+dy*dy; int ix,iy; w = int_sqrt(w*256); iy = w ? (hw * dy * 16)/ w : dy ? 0 : hw; ix = w ? (hw * dx * 16)/ w : dx ? 0 : hw; // rounding dependent on sign int nix, niy; if ( ix < 0 ) { nix = ix/2; ix = (ix-1)/2; } else { nix = (ix+1)/2; ix = ix/2; } if ( iy < 0 ) { niy = iy/2; iy = (iy-1)/2; } else { niy = (iy+1)/2; iy = iy/2; } 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) ); }