src/dolphinfileitemdelegate.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2008 by Peter Penz <peter.penz@gmx.at>                  *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "dolphinfileitemdelegate.h"
  21
  22 #include <dolphinmodel.h>
  23 #include <kfileitem.h>
  24 #include <kicon.h>
  25 #include <kiconloader.h>
  26
  27 #include <QAbstractItemModel>
  28 #include <QAbstractProxyModel>
  29 #include <QFontMetrics>
  30 #include <QPalette>
  31 #include <QPainter>
  32 #include <QStyleOptionViewItemV4>
  33
  34 DolphinFileItemDelegate::DolphinFileItemDelegate(QObject* parent) :
  35     KFileItemDelegate(parent),
  36     m_hasMinimizedNameColumn(false),
  37     m_cachedSize(),
  38     m_cachedEmblems()
  39 {
  40 }
  41
  42 DolphinFileItemDelegate::~DolphinFileItemDelegate()
  43 {
  44 }
  45
  46 void DolphinFileItemDelegate::paint(QPainter* painter,
  47                                     const QStyleOptionViewItem& option,
  48                                     const QModelIndex& index) const
  49 {
  50     const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(index.model());
  51     const DolphinModel* dolphinModel = static_cast<const DolphinModel*>(proxyModel->sourceModel());
  52     const bool isNameColumn = (index.column() == KDirModel::Name);
  53
  54     if (m_hasMinimizedNameColumn && isNameColumn) {
  55         QStyleOptionViewItemV4 opt(option);
  56         adjustOptionWidth(opt, proxyModel, dolphinModel, index);
  57         KFileItemDelegate::paint(painter, opt, index);
  58     } else {
  59         KFileItemDelegate::paint(painter, option, index);
  60     }
  61
  62     if (dolphinModel->hasRevisionData() && isNameColumn) {
  63         // The currently shown items are under revision control. Show the current revision
  64         // state by adding an emblem.
  65         const QModelIndex dirIndex = proxyModel->mapToSource(index);
  66         const QModelIndex revisionIndex = dolphinModel->index(dirIndex.row(), DolphinModel::Revision, dirIndex.parent());
  67         const QVariant data = dolphinModel->data(revisionIndex, Qt::DecorationRole);
  68         const RevisionControlPlugin::RevisionState state = static_cast<RevisionControlPlugin::RevisionState>(data.toInt());
  69
  70         if (state != RevisionControlPlugin::UnversionedRevision) {
  71             const QRect rect = iconRect(option, index);
  72             const QPixmap emblem = emblemForState(state, rect.size());
  73             painter->drawPixmap(rect.x(), rect.y() + rect.height() - emblem.height(), emblem);
  74         }
  75     }
  76 }
  77
  78 int DolphinFileItemDelegate::nameColumnWidth(const QString& name, const QStyleOptionViewItem& option)
  79 {
  80     QFontMetrics fontMetrics(option.font);
  81     int width = option.decorationSize.width() + fontMetrics.width(name) + 16;
  82
  83     const int defaultWidth = option.rect.width();
  84     if ((defaultWidth > 0) && (defaultWidth < width)) {
  85         width = defaultWidth;
  86     }
  87     return width;
  88 }
  89
  90 void DolphinFileItemDelegate::adjustOptionWidth(QStyleOptionViewItemV4& option,
  91                                                 const QAbstractProxyModel* proxyModel,
  92                                                 const DolphinModel* dolphinModel,
  93                                                 const QModelIndex& index)
  94 {
  95     const QModelIndex dirIndex = proxyModel->mapToSource(index);
  96     const KFileItem item = dolphinModel->itemForIndex(dirIndex);
  97     if (!item.isNull()) {
  98         // symbolic links are displayed in an italic font
  99         if (item.isLink()) {
 100             option.font.setItalic(true);
 101         }
 102
 103         const int width = nameColumnWidth(item.text(), option);
 104         option.rect.setWidth(width);
 105     }
 106 }
 107
 108 QPixmap DolphinFileItemDelegate::emblemForState(RevisionControlPlugin::RevisionState state, const QSize& size) const
 109 {
 110     // TODO: all icons that are use here will be replaced by revision control emblems provided by the
 111     // Oxygen team before KDE 4.4
 112     Q_ASSERT(state <= RevisionControlPlugin::ConflictingRevision);
 113     if ((m_cachedSize != size) || !m_cachedEmblems[state].isNull()) {
 114         m_cachedSize = size;
 115
 116         const int iconHeight = size.height();
 117         int emblemHeight = KIconLoader::SizeSmall;
 118         if (iconHeight >= KIconLoader::SizeEnormous) {
 119             emblemHeight = KIconLoader::SizeMedium;
 120         } else if (iconHeight >= KIconLoader::SizeLarge) {
 121             emblemHeight = KIconLoader::SizeSmallMedium;
 122         } else if (iconHeight >= KIconLoader::SizeMedium) {
 123             emblemHeight = KIconLoader::SizeSmall;
 124         } else {
 125             // TODO: it depends on the final icons whether a smaller size works
 126             emblemHeight = KIconLoader::SizeSmall /* / 2 */;
 127         }
 128
 129         const QSize emblemSize(emblemHeight, emblemHeight);
 130         for (int i = 0; i <= RevisionControlPlugin::ConflictingRevision; ++i) {
 131             QString iconName;
 132             switch (state) {
 133             case RevisionControlPlugin::NormalRevision:          iconName = "dialog-ok-apply"; break;
 134             case RevisionControlPlugin::UpdateRequiredRevision:  iconName = "rating"; break;
 135             case RevisionControlPlugin::LocallyModifiedRevision: iconName = "emblem-important"; break;
 136             case RevisionControlPlugin::AddedRevision:           iconName = "list-add"; break;
 137             case RevisionControlPlugin::ConflictingRevision:     iconName = "application-exit"; break;
 138             default: Q_ASSERT(false); break;
 139             }
 140
 141             m_cachedEmblems[i] = KIcon(iconName).pixmap(emblemSize);
 142         }
 143     }
 144     return m_cachedEmblems[state];
 145 }
 146