src/kcategorydrawer.cpp

   1 /**
   2   * This file is part of the KDE project
   3   * Copyright (C) 2007 Rafael Fernández López <ereslibre@gmail.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 "kcategorydrawer.h"
  22
  23 #include <QPainter>
  24 #include <QStyleOption>
  25
  26 #include <kcategorizedsortfilterproxymodel.h>
  27
  28 KCategoryDrawer::KCategoryDrawer()
  29 {
  30 }
  31
  32 KCategoryDrawer::~KCategoryDrawer()
  33 {
  34 }
  35
  36 void KCategoryDrawer::drawCategory(const QModelIndex &index,
  37                                    int sortRole,
  38                                    const QStyleOption &option,
  39                                    QPainter *painter) const
  40 {
  41     const QString category = index.model()->data(index, KCategorizedSortFilterProxyModel::CategoryRole).toString();
  42
  43     QColor color = option.palette.color(QPalette::Text);
  44
  45     painter->save();
  46     painter->setRenderHint(QPainter::Antialiasing);
  47
  48     QStyleOptionButton opt;
  49
  50     opt.rect = option.rect;
  51     opt.palette = option.palette;
  52     opt.direction = option.direction;
  53     opt.text = category;
  54
  55     if (option.state & QStyle::State_MouseOver)
  56     {
  57         const QPalette::ColorGroup group =
  58                                           option.state & QStyle::State_Enabled ?
  59                                           QPalette::Normal : QPalette::Disabled;
  60
  61         QLinearGradient gradient(option.rect.topLeft(),
  62                                  option.rect.bottomRight());
  63         gradient.setColorAt(0,
  64                             option.palette.color(group,
  65                                                  QPalette::Highlight).light());
  66         gradient.setColorAt(1, Qt::transparent);
  67
  68         painter->fillRect(option.rect, gradient);
  69     }
  70
  71     QFont painterFont = painter->font();
  72     painterFont.setWeight(QFont::Bold);
  73     painterFont.setPointSize(painterFont.pointSize() + 2);
  74     QFontMetrics metrics(painterFont);
  75     painter->setFont(painterFont);
  76
  77     QPainterPath path;
  78     path.addRect(option.rect.left(),
  79                  option.rect.bottom() - 2,
  80                  option.rect.width(),
  81                  2);
  82
  83     QLinearGradient gradient(option.rect.topLeft(),
  84                              option.rect.bottomRight());
  85     gradient.setColorAt(0, color);
  86     gradient.setColorAt(1, Qt::transparent);
  87
  88     painter->setBrush(gradient);
  89     painter->fillPath(path, gradient);
  90
  91     painter->setPen(color);
  92
  93     painter->drawText(option.rect, Qt::AlignVCenter | Qt::AlignLeft,
  94     metrics.elidedText(category, Qt::ElideRight, option.rect.width()));
  95
  96     painter->restore();
  97 }
  98
  99 int KCategoryDrawer::categoryHeight(const QStyleOption &option) const
 100 {
 101     return option.fontMetrics.height() + 6 /* 4 separator; 2 gradient */;
 102 }