apps/plasma/applets/folderview/label.cpp

   1 /*
   2  *   Copyright © 2008 Fredrik Höglund <fredrik@kde.org>
   3  *   Copyright © 2008 Andrew Lake <jamboarder@yahoo.com>
   4  *
   5  *   This library is free software; you can redistribute it and/or
   6  *   modify it under the terms of the GNU Library General Public
   7  *   License as published by the Free Software Foundation; either
   8  *   version 2 of the License, or (at your option) any later version.
   9  *
  10  *   This library is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *   Library General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU Library General Public License
  16  *   along with this library; see the file COPYING.LIB.  If not, write to
  17  *   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  *   Boston, MA 02110-1301, USA.
  19  */
  20
  21 #include "label.h"
  22
  23 #include <QString>
  24 #include <QPainter>
  25
  26 #include "plasma/paintutils.h"
  27
  28 Label::Label(QGraphicsWidget *parent)
  29     : QGraphicsWidget(parent)
  30 {
  31     setMinimumHeight(QFontMetrics(font()).lineSpacing() + 4);
  32     setMaximumHeight(QFontMetrics(font()).lineSpacing() + 4);
  33     setCacheMode(DeviceCoordinateCache);
  34 }
  35
  36 Label::~Label()
  37 {
  38 }
  39
  40 void Label::setText(const QString &text)
  41 {
  42     m_text = text;
  43     update();
  44 }
  45
  46 QString Label::text() const
  47 {
  48     return m_text;
  49 }
  50
  51 void Label::setDrawShadow(bool on)
  52 {
  53     m_drawShadow = on;
  54     update();
  55 }
  56
  57 bool Label::drawShadow() const
  58 {
  59     return m_drawShadow;
  60 }
  61
  62 void Label::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
  63 {
  64     Q_UNUSED(option)
  65     Q_UNUSED(widget)
  66
  67     const QString text = QFontMetrics(font()).elidedText(m_text, Qt::ElideMiddle, contentsRect().width());
  68
  69     QColor shadowColor;
  70     QPoint shadowOffset;
  71     if (!m_drawShadow) {
  72         shadowColor = Qt::transparent;
  73         shadowOffset = QPoint();
  74     } else if (qGray(palette().color(QPalette::Text).rgb()) > 192) {
  75         shadowColor = Qt::black;
  76         shadowOffset = QPoint(1, 1);
  77     } else {
  78         shadowColor = Qt::white;
  79         shadowOffset = QPoint();
  80     }
  81
  82     QPixmap titlePixmap = Plasma::PaintUtils::shadowText(text, palette().color(QPalette::Text),
  83                                                          shadowColor, shadowOffset);
  84     painter->drawPixmap(contentsRect().topLeft(), titlePixmap);
  85
  86     int width = contentsRect().width();
  87
  88     //Draw underline
  89     if (m_divider.width() != width) {
  90         qreal fw = 1.0 / width * 20.0;
  91         m_divider = QPixmap(width, 2);
  92         m_divider.fill(Qt::transparent);
  93         QLinearGradient g(0, 0, width, 0);
  94         g.setColorAt(0, Qt::transparent);
  95         g.setColorAt(fw, Qt::black);
  96         g.setColorAt(1 - fw, Qt::black);
  97         g.setColorAt(1, Qt::transparent);
  98         QPainter p(&m_divider);
  99         p.setCompositionMode(QPainter::CompositionMode_Source);
 100         p.fillRect(0, 0, width, 1, QColor(0, 0, 0, 64));
 101         p.fillRect(0, 1, width, 1, QColor(255, 255, 255, 64));
 102         p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
 103         p.fillRect(m_divider.rect(), g);
 104     }
 105     painter->drawPixmap(0, contentsRect().height() - 2, m_divider);
 106 }
 107
 108 #include "label.moc"
 109