apps/dolphin/src/dolphincategorydrawer.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 "dolphincategorydrawer.h"
  22 #include "ratingpainter.h"
  23 #include <QPainter>
  24 #include <QFile>
  25 #include <QDir>
  26
  27 #include <kiconloader.h>
  28 #include <kcategorizedsortfilterproxymodel.h>
  29 #include <qimageblitz.h>
  30 #include <kuser.h>
  31
  32 #include <config-nepomuk.h>
  33 #ifdef HAVE_NEPOMUK
  34 #include <nepomuk/global.h>
  35 #include <nepomuk/resource.h>
  36 #include <nepomuk/tag.h>
  37 #endif
  38
  39 #include "dolphinview.h"
  40 #include "dolphinmodel.h"
  41
  42 DolphinCategoryDrawer::DolphinCategoryDrawer()
  43 {
  44 }
  45
  46 DolphinCategoryDrawer::~DolphinCategoryDrawer()
  47 {
  48 }
  49
  50 void DolphinCategoryDrawer::drawCategory(const QModelIndex &index, int sortRole,
  51                                          const QStyleOption &option, QPainter *painter) const
  52 {
  53     Q_UNUSED(sortRole);
  54
  55     QRect starRect = option.rect;
  56
  57     int iconSize = KIconLoader::global()->currentSize(KIconLoader::Small);
  58     QVariant categoryVariant = index.model()->data(index, KCategorizedSortFilterProxyModel::CategoryDisplayRole);
  59
  60     if (!categoryVariant.isValid())
  61     {
  62         return;
  63     }
  64
  65     const QString category = categoryVariant.toString();
  66
  67     QColor color;
  68
  69     if (option.state & QStyle::State_Selected)
  70     {
  71         color = option.palette.color(QPalette::HighlightedText);
  72     }
  73     else
  74     {
  75         color = option.palette.color(QPalette::Text);
  76     }
  77
  78     painter->save();
  79     painter->setRenderHint(QPainter::Antialiasing);
  80
  81     QStyleOptionButton opt;
  82
  83     opt.rect = option.rect;
  84     opt.palette = option.palette;
  85     opt.direction = option.direction;
  86     opt.text = category;
  87
  88     if (option.state & QStyle::State_Selected)
  89     {
  90         QColor selected = option.palette.color(QPalette::Highlight);
  91
  92         QLinearGradient gradient(option.rect.topLeft(),
  93                                  option.rect.bottomRight());
  94         gradient.setColorAt(option.direction == Qt::LeftToRight ? 0
  95                                                                 : 1, selected);
  96         gradient.setColorAt(option.direction == Qt::LeftToRight ? 1
  97                                                                 : 0, Qt::transparent);
  98
  99         painter->fillRect(option.rect, gradient);
 100     }
 101     else if (option.state & QStyle::State_MouseOver)
 102     {
 103         QColor hover = option.palette.color(QPalette::Highlight);
 104         hover.setAlpha(88);
 105
 106         QLinearGradient gradient(option.rect.topLeft(),
 107                                  option.rect.bottomRight());
 108         gradient.setColorAt(option.direction == Qt::LeftToRight ? 0
 109                                                                 : 1, hover);
 110         gradient.setColorAt(option.direction == Qt::LeftToRight ? 1
 111                                                                 : 0, Qt::transparent);
 112
 113         painter->fillRect(option.rect, gradient);
 114     }
 115
 116     QFont painterFont = painter->font();
 117     painterFont.setWeight(QFont::Bold);
 118     QFontMetrics metrics(painterFont);
 119     painter->setFont(painterFont);
 120
 121     QPainterPath path;
 122     path.addRect(option.rect.left(),
 123                  option.rect.bottom() - 1,
 124                  option.rect.width(),
 125                  1);
 126
 127     QLinearGradient gradient(option.rect.topLeft(),
 128                              option.rect.bottomRight());
 129     gradient.setColorAt(option.direction == Qt::LeftToRight ? 0
 130                                                             : 1, color);
 131     gradient.setColorAt(option.direction == Qt::LeftToRight ? 1
 132                                                             : 0, Qt::transparent);
 133
 134     painter->setBrush(gradient);
 135     painter->fillPath(path, gradient);
 136
 137     if (option.direction == Qt::LeftToRight)
 138     {
 139         opt.rect.setLeft(opt.rect.left());
 140         starRect.setLeft(starRect.left());
 141         starRect.setRight(starRect.right());
 142     }
 143     else
 144     {
 145         opt.rect.setRight(opt.rect.width());
 146         starRect.setLeft(starRect.width());
 147         starRect.setRight(starRect.width());
 148     }
 149
 150     bool paintIcon = true;
 151     bool paintText = true;
 152
 153     QPixmap icon;
 154     switch (index.column()) {
 155         case KDirModel::Name:
 156             paintIcon = false;
 157             break;
 158
 159         case KDirModel::Size:
 160             paintIcon = false;
 161             break;
 162
 163         case KDirModel::ModifiedTime:
 164             paintIcon = false;
 165             break;
 166
 167         case KDirModel::Permissions:
 168             paintIcon = false; // TODO: let's think about how to represent permissions
 169             break;
 170
 171         case KDirModel::Owner: {
 172             opt.rect.setTop(option.rect.bottom() - (iconSize / 4));
 173             KUser user(category);
 174             QString faceIconPath = user.faceIconPath();
 175
 176             if (!faceIconPath.isEmpty())
 177             {
 178                 icon = QPixmap::fromImage(QImage(faceIconPath).scaledToHeight(option.fontMetrics.height(), Qt::SmoothTransformation));
 179             }
 180             else
 181             {
 182                 icon = KIconLoader::global()->loadIcon("user-identity", KIconLoader::NoGroup, option.fontMetrics.height());
 183             }
 184
 185             opt.rect.setTop(opt.rect.top() - icon.height());
 186
 187             break;
 188         }
 189
 190         case KDirModel::Group:
 191             paintIcon = false;
 192             break;
 193
 194         case KDirModel::Type: {
 195             opt.rect.setTop(option.rect.bottom() - (iconSize / 4));
 196             const KCategorizedSortFilterProxyModel *proxyModel = static_cast<const KCategorizedSortFilterProxyModel*>(index.model());
 197             const DolphinModel *model = static_cast<const DolphinModel*>(proxyModel->sourceModel());
 198             KFileItem item = model->itemForIndex(proxyModel->mapToSource(index));
 199             // This is the only way of getting the icon right. Others will fail on corner
 200             // cases like the item representing this group has been set a different icon,
 201             // so the group icon drawn is that one particularly. This way assures the drawn
 202             // icon is the one of the mimetype of the group itself. (ereslibre)
 203             icon = KIconLoader::global()->loadMimeTypeIcon(item.mimeTypePtr()->iconName(),
 204                                                            KIconLoader::NoGroup, option.fontMetrics.height());
 205
 206             opt.rect.setTop(opt.rect.top() - icon.height());
 207
 208             break;
 209         }
 210
 211 #ifdef HAVE_NEPOMUK
 212         case DolphinModel::Rating: {
 213             paintText = false;
 214             paintIcon = false;
 215
 216             painter->setLayoutDirection( option.direction );
 217             QRect ratingRect( option.rect );
 218             ratingRect.setTop(option.rect.top() + (option.rect.height() / 2) - (iconSize / 2));
 219             ratingRect.setHeight( iconSize );
 220             Nepomuk::RatingPainter::drawRating( painter, ratingRect, Qt::AlignLeft, category.toInt() );
 221             break;
 222         }
 223
 224         case DolphinModel::Tags:
 225             paintIcon = false;
 226             break;
 227 #endif
 228     }
 229
 230     if (paintIcon) {
 231         painter->drawPixmap(QRect(option.direction == Qt::LeftToRight ? opt.rect.left()
 232                                                                       : opt.rect.right() - icon.width() + (iconSize / 4), opt.rect.top(), icon.width(), icon.height()), icon);
 233
 234         if (option.direction == Qt::LeftToRight)
 235         {
 236             opt.rect.setLeft(opt.rect.left() + icon.width() + (iconSize / 4));
 237         }
 238         else
 239         {
 240             opt.rect.setRight(opt.rect.right() + (iconSize / 4));
 241         }
 242     }
 243
 244     if (paintText) {
 245         opt.rect.setTop(option.rect.top() + (iconSize / 4));
 246         opt.rect.setBottom(opt.rect.bottom() - 1);
 247         painter->setPen(color);
 248
 249         QRect textRect = opt.rect;
 250
 251         if (option.direction == Qt::RightToLeft)
 252         {
 253             textRect.setWidth(textRect.width() - (paintIcon ? icon.width() + (iconSize / 4)
 254                                                             : -(iconSize / 4)));
 255         }
 256
 257         painter->drawText(textRect, Qt::AlignVCenter | Qt::AlignLeft,
 258         metrics.elidedText(category, Qt::ElideRight, textRect.width()));
 259     }
 260
 261     painter->restore();
 262 }
 263
 264 int DolphinCategoryDrawer::categoryHeight(const QModelIndex &index, const QStyleOption &option) const
 265 {
 266     int iconSize = KIconLoader::global()->currentSize(KIconLoader::Small);
 267     int heightWithoutIcon = option.fontMetrics.height() + (iconSize / 4) * 2 + 1; /* 1 pixel-width gradient */
 268     bool paintIcon;
 269
 270     switch (index.column()) {
 271         case KDirModel::Owner:
 272         case KDirModel::Type:
 273             paintIcon = true;
 274             break;
 275         default:
 276             paintIcon = false;
 277     }
 278
 279     if (paintIcon)
 280         return qMax(heightWithoutIcon, iconSize + (iconSize / 4) * 2 + 1) /* 1 pixel-width gradient */;
 281
 282     return heightWithoutIcon;
 283 }