1 /*

     2 * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: Time label for oled digital clock.

    15 *

    16 */

    17 

    18 #include "snsroledtimelabel.h"

    19 

    20 #include <hbevent.h>

    21 #include <hbcolorscheme.h>

    22 #include <QPainter>

    23 

    24 

    25 const QString snsrForegroundColorRole("snsrforeground");

    26 

    27 /*!

    28     \class SnsrOledTimeLabel

    29     \ingroup group_snsrbigclockscreensaverprovider

    30     \brief Screensaver oled digital clock's time label

    31  */

    32 

    33 /*!

    34     Constructs a new SnsrOledTimeLabel.

    35     \param parent Parent object.

    36  */

    37 

    38 SnsrOledTimeLabel::SnsrOledTimeLabel(QGraphicsItem *parent)

    39     : HbTextItem(parent)

    40 {

    41     setThemedTextColor();

    42     

    43     setMinimumLines( 1 );

    44     setMaximumLines( 1 );

    45     setAlignment(Qt::AlignCenter);

    46     

    47     // as we do own painting, must disable the flag that is enabled

    48     // by default due to performance optimatizations.

    49     setFlag(QGraphicsItem::ItemHasNoContents,false);

    50 }

    51 

    52 SnsrOledTimeLabel::~SnsrOledTimeLabel()

    53 {

    54 }

    55 

    56 /*!

    57     \reimp

    58     We want to draw only the outlines of the time label text and thus

    59     text is drawn here with QPainterPath and pen (no brush) which seems to be the

    60     only way to accomplish this. 

    61     Base class's Paint method must not be called!

    62     We use base class only to get the bounding rect inside which to draw the text

    63     (boundingRect has been adjusted to current text, font, alignment etc.)

    64  */

    65 void SnsrOledTimeLabel::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)

    66 {

    67     Q_UNUSED(option);

    68     Q_UNUSED(widget);

    69     

    70     // TODO: changes needed for mirrored layout and/or other than latin digits??

    71     

    72     painter->save();   //saves the painter state.

    73     

    74     QPainterPath path;

    75     

    76     QRectF boundingRect = this->boundingRect();   

    77     QString timeText = this->text();

    78     QFont font = this->font();

    79 

    80     // As painterPath takes the left end of the text's baseline as 

    81     // a parameter we must calculate that point from boundingRect's bottom left 

    82     // so that font's descent (and baseline (=1)) are taken into account. 

    83     // We want to center the text horizontally too. The logic

    84     // is basically the same as used inside the base class for drawing the text

    85     // within boundingRect.

    86     QPointF leftEndOfBaseline(0,0);  // for painterPath

    87     QFontMetrics fontMetrics(font);

    88     int descent = fontMetrics.descent();

    89     int width = fontMetrics.width(timeText);   

    90     leftEndOfBaseline.setY(boundingRect.bottomLeft().y() - descent -1);

    91     leftEndOfBaseline.setX((boundingRect.width() - width) / 2 ); // centerH

    92     

    93     path.addText(leftEndOfBaseline, font, timeText);  

    94     

    95     painter->setFont(font);

    96 

    97     QPen newPen = painter->pen();

    98     newPen.setWidth( 1 ); // TODO: is this width ok?

    99     newPen.setColor(this->textColor());

   100     painter->setPen(newPen);

   101     

   102     painter->setBrush(QBrush(Qt::NoBrush));

   103 

   104   //  painter->setLayoutDirection ( layoutDirection() ); // TODO: needed or not?

   105     

   106     painter->setRenderHint(QPainter::Antialiasing, true); // TODO: use or not?

   107     

   108     painter->drawPath(path);

   109     

   110     // Must restore the painter or the whole UI will be messed up!

   111     painter->restore();

   112 

   113 }

   114 

   115 /*!

   116     \reimp

   117  */

   118 void SnsrOledTimeLabel::changeEvent(QEvent * event)

   119 {

   120     if (event->type() == HbEvent::ThemeChanged) {

   121         setThemedTextColor();

   122     }

   123     return HbTextItem::changeEvent(event);

   124 }

   125 

   126 

   127 /*!

   128     Sets the time label's color to follow the theme.

   129  */

   130 void SnsrOledTimeLabel::setThemedTextColor()

   131 {

   132     QColor textColor(HbColorScheme::color(snsrForegroundColorRole));

   133     if (textColor.isValid()) {

   134         setTextColor(textColor);

   135     } else {

   136         // fallback mechanism when color definition is missing in default theme

   137         setTextColor(Qt::white);

   138     }

   139 }

   140 

   141