Qwt User's Guide: qwt_analog_clock.cpp Source File

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# qwt_analog_clock.cpp

    00001 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
    00002  * Qwt Widget Library
    00003  * Copyright (C) 1997   Josef Wilgen
    00004  * Copyright (C) 2002   Uwe Rathmann
    00005  *
    00006  * This library is free software; you can redistribute it and/or
    00007  * modify it under the terms of the Qwt License, Version 1.0
    00008  *****************************************************************************/
    00009
    00010 #include "qwt_analog_clock.h"
    00011
    00016 QwtAnalogClock::QwtAnalogClock(QWidget *parent):
    00017     QwtDial(parent)
    00018 {
    00019     initClock();
    00020 }
    00021
    00022 #if QT_VERSION < 0x040000
    00023
    00028 QwtAnalogClock::QwtAnalogClock(QWidget* parent, const char *name):
    00029     QwtDial(parent, name)
    00030 {
    00031     initClock();
    00032 }
    00033 #endif
    00034
    00035 void QwtAnalogClock::initClock()
    00036 {
    00037     setWrapping(true);
    00038     setReadOnly(true);
    00039
    00040     setOrigin(270.0);
    00041     setRange(0.0, 60.0 * 60.0 * 12.0); // seconds
    00042     setScale(-1, 5, 60.0 * 60.0);
    00043
    00044     setScaleOptions(ScaleTicks | ScaleLabel);
    00045     setScaleTicks(1, 0, 8);
    00046     scaleDraw()->setSpacing(8);
    00047
    00048     QColor knobColor =
    00049 #if QT_VERSION < 0x040000
    00050         palette().color(QPalette::Active, QColorGroup::Text);
    00051 #else
    00052         palette().color(QPalette::Active, QPalette::Text);
    00053 #endif
    00054     knobColor = knobColor.dark(120);
    00055
    00056     QColor handColor;
    00057     int width;
    00058
    00059     for ( int i = 0; i < NHands; i++ )
    00060     {
    00061         if ( i == SecondHand )
    00062         {
    00063             width = 2;
    00064             handColor = knobColor.dark(120);
    00065         }
    00066         else
    00067         {
    00068             width = 8;
    00069             handColor = knobColor;
    00070         }
    00071
    00072         QwtDialSimpleNeedle *hand = new QwtDialSimpleNeedle(
    00073             QwtDialSimpleNeedle::Arrow, true, handColor, knobColor);
    00074         hand->setWidth(width);
    00075
    00076         d_hand[i] = NULL;
    00077         setHand((Hand)i, hand);
    00078     }
    00079 }
    00080
    00082 QwtAnalogClock::~QwtAnalogClock()
    00083 {
    00084     for ( int i = 0; i < NHands; i++ )
    00085         delete d_hand[i];
    00086 }
    00087
    00092 void QwtAnalogClock::setNeedle(QwtDialNeedle *)
    00093 {
    00094     // no op
    00095     return;
    00096 }
    00097
    00104 void QwtAnalogClock::setHand(Hand hand, QwtDialNeedle *needle)
    00105 {
    00106     if ( hand >= 0 || hand < NHands )
    00107     {
    00108         delete d_hand[hand];
    00109         d_hand[hand] = needle;
    00110     }
    00111 }
    00112
    00118 QwtDialNeedle *QwtAnalogClock::hand(Hand hd)
    00119 {
    00120     if ( hd < 0 || hd >= NHands )
    00121         return NULL;
    00122
    00123     return d_hand[hd];
    00124 }
    00125
    00131 const QwtDialNeedle *QwtAnalogClock::hand(Hand hd) const
    00132 {
    00133     return ((QwtAnalogClock *)this)->hand(hd);
    00134 }
    00135
    00142 void QwtAnalogClock::setCurrentTime()
    00143 {
    00144     setTime(QTime::currentTime());
    00145 }
    00146
    00151 void QwtAnalogClock::setTime(const QTime &time)
    00152 {
    00153     if ( time.isValid() )
    00154     {
    00155         setValue((time.hour() % 12) * 60.0 * 60.0
    00156             + time.minute() * 60.0 + time.second());
    00157     }
    00158     else
    00159         setValid(false);
    00160 }
    00161
    00168 QwtText QwtAnalogClock::scaleLabel(double value) const
    00169 {
    00170     if ( value == 0.0 )
    00171         value = 60.0 * 60.0 * 12.0;
    00172
    00173     return QString::number(int(value / (60.0 * 60.0)));
    00174 }
    00175
    00191 void QwtAnalogClock::drawNeedle(QPainter *painter, const QPoint &center,
    00192         int radius, double, QPalette::ColorGroup cg) const
    00193 {
    00194     if ( isValid() )
    00195     {
    00196         const double hours = value() / (60.0 * 60.0);
    00197         const double minutes = (value() - (int)hours * 60.0 * 60.0) / 60.0;
    00198         const double seconds = value() - (int)hours * 60.0 * 60.0
    00199             - (int)minutes * 60.0;
    00200
    00201         drawHand(painter, HourHand, center, radius,
    00202             360.0 - (origin() + 360.0 * hours / 12.0), cg);
    00203         drawHand(painter, MinuteHand, center, radius,
    00204             360.0 - (origin() + 360.0 * minutes / 60.0), cg);
    00205         drawHand(painter, SecondHand, center, radius,
    00206             360.0 - (origin() + 360.0 * seconds / 60.0), cg);
    00207     }
    00208 }
    00209
    00220 void QwtAnalogClock::drawHand(QPainter *painter, Hand hd,
    00221     const QPoint &center, int radius, double direction,
    00222     QPalette::ColorGroup cg) const
    00223 {
    00224     const QwtDialNeedle *needle = hand(hd);
    00225     if ( needle )
    00226     {
    00227         if ( hd == HourHand )
    00228             radius = qRound(0.8 * radius);
    00229
    00230         needle->draw(painter, center, radius, direction, cg);
    00231     }
    00232 }