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