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