src/kcategorydrawer.cpp

   1 /**
   2   * This file is part of the KDE project
   3   * Copyright (C) 2007 Rafael Fernández López <ereslibre@kde.org>
   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 "kcategorydrawer.h"
  22
  23 #include <QPainter>
  24 #include <QStyleOption>
  25
  26 #include <kiconloader.h>
  27 #include <kcategorizedsortfilterproxymodel.h>
  28
  29 KCategoryDrawer::KCategoryDrawer()
  30 {
  31 }
  32
  33 KCategoryDrawer::~KCategoryDrawer()
  34 {
  35 }
  36
  37 void KCategoryDrawer::drawCategory(const QModelIndex &index,
  38                                    int /*sortRole*/,
  39                                    const QStyleOption &option,
  40                                    QPainter *painter) const
  41 {
  42     const QString category = index.model()->data(index, KCategorizedSortFilterProxyModel::CategoryDisplayRole).toString();
  43
  44     QColor color;
  45
  46     if (option.state & QStyle::State_Selected)
  47     {
  48         color = option.palette.color(QPalette::HighlightedText);
  49     }
  50     else
  51     {
  52         color = option.palette.color(QPalette::Text);
  53     }
  54
  55     painter->save();
  56     painter->setRenderHint(QPainter::Antialiasing);
  57
  58     if (option.state & QStyle::State_Selected)
  59     {
  60         QColor selected = option.palette.color(QPalette::Highlight);
  61
  62         QLinearGradient gradient(option.rect.topLeft(),
  63                                  option.rect.bottomRight());
  64         gradient.setColorAt(option.direction == Qt::LeftToRight ? 0
  65                                                                 : 1, selected);
  66         gradient.setColorAt(option.direction == Qt::LeftToRight ? 1
  67                                                                 : 0, Qt::transparent);
  68
  69         painter->fillRect(option.rect, gradient);
  70     }
  71     else if (option.state & QStyle::State_MouseOver)
  72     {
  73         QColor hover = option.palette.color(QPalette::Highlight).light();
  74         hover.setAlpha(88);
  75
  76         QLinearGradient gradient(option.rect.topLeft(),
  77                                  option.rect.bottomRight());
  78         gradient.setColorAt(option.direction == Qt::LeftToRight ? 0
  79                                                                 : 1, hover);
  80         gradient.setColorAt(option.direction == Qt::LeftToRight ? 1
  81                                                                 : 0, Qt::transparent);
  82
  83         painter->fillRect(option.rect, gradient);
  84     }
  85
  86     QFont painterFont = painter->font();
  87     painterFont.setWeight(QFont::Bold);
  88     QFontMetrics metrics(painterFont);
  89     painter->setFont(painterFont);
  90
  91     QRect lineRect(option.rect.left(),
  92                    option.rect.bottom() - 1,
  93                    option.rect.width(),
  94                    1);
  95
  96     QLinearGradient gradient(option.rect.topLeft(),
  97                              option.rect.bottomRight());
  98     gradient.setColorAt(option.direction == Qt::LeftToRight ? 0
  99                                                             : 1, color);
 100     gradient.setColorAt(option.direction == Qt::LeftToRight ? 1
 101                                                             : 0, Qt::transparent);
 102
 103     painter->fillRect(lineRect, gradient);
 104
 105     painter->setPen(color);
 106
 107     painter->drawText(option.rect, Qt::AlignVCenter | Qt::AlignLeft,
 108     metrics.elidedText(category, Qt::ElideRight, option.rect.width()));
 109
 110     painter->restore();
 111 }
 112
 113 int KCategoryDrawer::categoryHeight(const QModelIndex &index, const QStyleOption &option) const
 114 {
 115     Q_UNUSED(index);
 116
 117     return option.fontMetrics.height() + 4 /* 3 separator; 1 gradient */;
 118 }