src/views/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     setJobTransfersVisible(true);
  41 }
  42
  43 DolphinFileItemDelegate::~DolphinFileItemDelegate()
  44 {
  45 }
  46
  47 void DolphinFileItemDelegate::paint(QPainter* painter,
  48                                     const QStyleOptionViewItem& option,
  49                                     const QModelIndex& index) const
  50 {
  51     const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(index.model());
  52     const DolphinModel* dolphinModel = static_cast<const DolphinModel*>(proxyModel->sourceModel());
  53     const bool isNameColumn = (index.column() == KDirModel::Name);
  54
  55     QStyleOptionViewItemV4 opt(option);
  56     if (m_hasMinimizedNameColumn && isNameColumn) {
  57         adjustOptionWidth(opt, proxyModel, dolphinModel, index);
  58     }
  59
  60     if (dolphinModel->hasVersionData() && isNameColumn) {
  61         // The currently shown items are under revision control. Show the current revision
  62         // state by adding an emblem and changing the text tintColor.
  63         const QModelIndex dirIndex = proxyModel->mapToSource(index);
  64         const QModelIndex revisionIndex = dolphinModel->index(dirIndex.row(), DolphinModel::Version, dirIndex.parent());
  65         const QVariant data = dolphinModel->data(revisionIndex, Qt::DecorationRole);
  66         const KVersionControlPlugin::VersionState state = static_cast<KVersionControlPlugin::VersionState>(data.toInt());
  67
  68         adjustOptionTextColor(opt, state);
  69
  70         KFileItemDelegate::paint(painter, opt, index);
  71
  72         if (state != KVersionControlPlugin::UnversionedVersion) {
  73             const QRect rect = iconRect(option, index);
  74             const QPixmap emblem = emblemForState(state, rect.size());
  75             painter->drawPixmap(rect.x(), rect.y() + rect.height() - emblem.height(), emblem);
  76         }
  77     } else {
  78         KFileItemDelegate::paint(painter, opt, index);
  79     }
  80 }
  81
  82 int DolphinFileItemDelegate::nameColumnWidth(const QString& name, const QStyleOptionViewItem& option)
  83 {
  84     QFontMetrics fontMetrics(option.font);
  85     int width = option.decorationSize.width() + fontMetrics.width(name) + 16;
  86
  87     const int defaultWidth = option.rect.width();
  88     if ((defaultWidth > 0) && (defaultWidth < width)) {
  89         width = defaultWidth;
  90     }
  91     return width;
  92 }
  93
  94 void DolphinFileItemDelegate::adjustOptionWidth(QStyleOptionViewItemV4& option,
  95                                                 const QAbstractProxyModel* proxyModel,
  96                                                 const DolphinModel* dolphinModel,
  97                                                 const QModelIndex& index)
  98 {
  99     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 100     const KFileItem item = dolphinModel->itemForIndex(dirIndex);
 101     if (!item.isNull()) {
 102         // symbolic links are displayed in an italic font
 103         if (item.isLink()) {
 104             option.font.setItalic(true);
 105         }
 106
 107         const int width = nameColumnWidth(item.text(), option);
 108         option.rect.setWidth(width);
 109     }
 110 }
 111
 112 void DolphinFileItemDelegate::adjustOptionTextColor(QStyleOptionViewItemV4& option,
 113                                                     KVersionControlPlugin::VersionState state)
 114 {
 115     QColor tintColor;
 116
 117     // Using hardcoded colors is generally a bad idea. In this case the colors just act
 118     // as tint colors and are mixed with the current set text color. The tint colors
 119     // have been optimized for the base colors of the corresponding Oxygen emblems.
 120     switch (state) {
 121     case KVersionControlPlugin::UpdateRequiredVersion:  tintColor = Qt::yellow; break;
 122     case KVersionControlPlugin::LocallyModifiedVersion: tintColor = Qt::green; break;
 123     case KVersionControlPlugin::AddedVersion:           tintColor = Qt::darkGreen; break;
 124     case KVersionControlPlugin::RemovedVersion:         tintColor = Qt::darkRed; break;
 125     case KVersionControlPlugin::ConflictingVersion:     tintColor = Qt::red; break;
 126     case KVersionControlPlugin::UnversionedVersion:
 127     case KVersionControlPlugin::NormalVersion:
 128     default:
 129         // use the default text color
 130         return;
 131     }
 132
 133     QPalette palette = option.palette;
 134     const QColor textColor = palette.color(QPalette::Text);
 135     tintColor = QColor((tintColor.red()   + textColor.red())   / 2,
 136                        (tintColor.green() + textColor.green()) / 2,
 137                        (tintColor.blue()  + textColor.blue())  / 2,
 138                        (tintColor.alpha() + textColor.alpha()) / 2);
 139     palette.setColor(QPalette::Text, tintColor);
 140     option.palette = palette;
 141 }
 142
 143 QPixmap DolphinFileItemDelegate::emblemForState(KVersionControlPlugin::VersionState state, const QSize& size) const
 144 {
 145     Q_ASSERT(state <= KVersionControlPlugin::ConflictingVersion);
 146     if (m_cachedSize != size) {
 147         m_cachedSize = size;
 148
 149         const int iconHeight = size.height();
 150         int emblemHeight = KIconLoader::SizeSmall;
 151         if (iconHeight >= KIconLoader::SizeEnormous) {
 152             emblemHeight = KIconLoader::SizeMedium;
 153         } else if (iconHeight >= KIconLoader::SizeLarge) {
 154             emblemHeight = KIconLoader::SizeSmallMedium;
 155         } else if (iconHeight >= KIconLoader::SizeMedium) {
 156             emblemHeight = KIconLoader::SizeSmall;
 157         } else {
 158             emblemHeight = KIconLoader::SizeSmall / 2;
 159         }
 160
 161         const QSize emblemSize(emblemHeight, emblemHeight);
 162         for (int i = KVersionControlPlugin::NormalVersion; i <= KVersionControlPlugin::ConflictingVersion; ++i) {
 163             QString iconName;
 164             switch (i) {
 165             case KVersionControlPlugin::NormalVersion:          iconName = "vcs-normal"; break;
 166             case KVersionControlPlugin::UpdateRequiredVersion:  iconName = "vcs-update-required"; break;
 167             case KVersionControlPlugin::LocallyModifiedVersion: iconName = "vcs-locally-modified"; break;
 168             case KVersionControlPlugin::AddedVersion:           iconName = "vcs-added"; break;
 169             case KVersionControlPlugin::RemovedVersion:         iconName = "vcs-removed"; break;
 170             case KVersionControlPlugin::ConflictingVersion:     iconName = "vcs-conflicting"; break;
 171             case KVersionControlPlugin::UnversionedVersion:
 172             default:                                            Q_ASSERT(false); break;
 173             }
 174
 175             m_cachedEmblems[i] = KIcon(iconName).pixmap(emblemSize);
 176         }
 177     }
 178     return m_cachedEmblems[state];
 179 }
 180