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 #include <kstringhandler.h>
  27
  28 #include <QAbstractItemModel>
  29 #include <QAbstractProxyModel>
  30 #include <QFontMetrics>
  31 #include <QPalette>
  32 #include <QPainter>
  33 #include <QStyleOptionViewItemV4>
  34
  35 DolphinFileItemDelegate::DolphinFileItemDelegate(QObject* parent) :
  36     KFileItemDelegate(parent),
  37     m_hasMinimizedNameColumn(false),
  38     m_cachedSize(),
  39     m_cachedEmblems()
  40 {
  41     setJobTransfersVisible(true);
  42 }
  43
  44 DolphinFileItemDelegate::~DolphinFileItemDelegate()
  45 {
  46 }
  47
  48 void DolphinFileItemDelegate::paint(QPainter* painter,
  49                                     const QStyleOptionViewItem& option,
  50                                     const QModelIndex& index) const
  51 {
  52     const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(index.model());
  53     const DolphinModel* dolphinModel = static_cast<const DolphinModel*>(proxyModel->sourceModel());
  54     const bool isNameColumn = (index.column() == KDirModel::Name);
  55
  56     QStyleOptionViewItemV4 opt(option);
  57     if (m_hasMinimizedNameColumn && isNameColumn) {
  58         adjustOptionWidth(opt, proxyModel, dolphinModel, index);
  59     }
  60
  61     if (dolphinModel->hasVersionData() && isNameColumn) {
  62         // The currently shown items are under revision control. Show the current revision
  63         // state by adding an emblem and changing the text tintColor.
  64         const QModelIndex dirIndex = proxyModel->mapToSource(index);
  65         const QModelIndex revisionIndex = dolphinModel->index(dirIndex.row(), DolphinModel::Version, dirIndex.parent());
  66         const QVariant data = dolphinModel->data(revisionIndex, Qt::DecorationRole);
  67         const KVersionControlPlugin::VersionState state = static_cast<KVersionControlPlugin::VersionState>(data.toInt());
  68
  69         adjustOptionTextColor(opt, state);
  70
  71         KFileItemDelegate::paint(painter, opt, index);
  72
  73         if (state != KVersionControlPlugin::UnversionedVersion) {
  74             const QRect rect = iconRect(option, index);
  75             const QPixmap emblem = emblemForState(state, rect.size());
  76             painter->drawPixmap(rect.x(), rect.y() + rect.height() - emblem.height(), emblem);
  77         }
  78     } else {
  79         KFileItemDelegate::paint(painter, opt, index);
  80     }
  81 }
  82
  83 int DolphinFileItemDelegate::nameColumnWidth(const QString& name, const QStyleOptionViewItem& option)
  84 {
  85     QFontMetrics fontMetrics(option.font);
  86     int width = option.decorationSize.width() + fontMetrics.width(KStringHandler::preProcessWrap(name)) + 16;
  87
  88     const int defaultWidth = option.rect.width();
  89     if ((defaultWidth > 0) && (defaultWidth < width)) {
  90         width = defaultWidth;
  91     }
  92     return width;
  93 }
  94
  95 void DolphinFileItemDelegate::adjustOptionWidth(QStyleOptionViewItemV4& option,
  96                                                 const QAbstractProxyModel* proxyModel,
  97                                                 const DolphinModel* dolphinModel,
  98                                                 const QModelIndex& index)
  99 {
 100     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 101     const KFileItem item = dolphinModel->itemForIndex(dirIndex);
 102     if (!item.isNull()) {
 103         // symbolic links are displayed in an italic font
 104         if (item.isLink()) {
 105             option.font.setItalic(true);
 106         }
 107
 108         const int width = nameColumnWidth(item.text(), option);
 109         option.rect.setWidth(width);
 110     }
 111 }
 112
 113 void DolphinFileItemDelegate::adjustOptionTextColor(QStyleOptionViewItemV4& option,
 114                                                     KVersionControlPlugin::VersionState state)
 115 {
 116     QColor tintColor;
 117
 118     // Using hardcoded colors is generally a bad idea. In this case the colors just act
 119     // as tint colors and are mixed with the current set text color. The tint colors
 120     // have been optimized for the base colors of the corresponding Oxygen emblems.
 121     switch (state) {
 122     case KVersionControlPlugin::UpdateRequiredVersion:  tintColor = Qt::yellow; break;
 123     case KVersionControlPlugin::LocallyModifiedVersion: tintColor = Qt::green; break;
 124     case KVersionControlPlugin::AddedVersion:           tintColor = Qt::darkGreen; break;
 125     case KVersionControlPlugin::RemovedVersion:         tintColor = Qt::darkRed; break;
 126     case KVersionControlPlugin::ConflictingVersion:     tintColor = Qt::red; break;
 127     case KVersionControlPlugin::UnversionedVersion:
 128     case KVersionControlPlugin::NormalVersion:
 129     default:
 130         // use the default text color
 131         return;
 132     }
 133
 134     QPalette palette = option.palette;
 135     const QColor textColor = palette.color(QPalette::Text);
 136     tintColor = QColor((tintColor.red()   + textColor.red())   / 2,
 137                        (tintColor.green() + textColor.green()) / 2,
 138                        (tintColor.blue()  + textColor.blue())  / 2,
 139                        (tintColor.alpha() + textColor.alpha()) / 2);
 140     palette.setColor(QPalette::Text, tintColor);
 141     option.palette = palette;
 142 }
 143
 144 QPixmap DolphinFileItemDelegate::emblemForState(KVersionControlPlugin::VersionState state, const QSize& size) const
 145 {
 146     Q_ASSERT(state <= KVersionControlPlugin::ConflictingVersion);
 147     if (m_cachedSize != size) {
 148         m_cachedSize = size;
 149
 150         const int iconHeight = size.height();
 151         int emblemHeight = KIconLoader::SizeSmall;
 152         if (iconHeight >= KIconLoader::SizeEnormous) {
 153             emblemHeight = KIconLoader::SizeMedium;
 154         } else if (iconHeight >= KIconLoader::SizeLarge) {
 155             emblemHeight = KIconLoader::SizeSmallMedium;
 156         } else if (iconHeight >= KIconLoader::SizeMedium) {
 157             emblemHeight = KIconLoader::SizeSmall;
 158         } else {
 159             emblemHeight = KIconLoader::SizeSmall / 2;
 160         }
 161
 162         const QSize emblemSize(emblemHeight, emblemHeight);
 163         for (int i = KVersionControlPlugin::NormalVersion; i <= KVersionControlPlugin::ConflictingVersion; ++i) {
 164             QString iconName;
 165             switch (i) {
 166             case KVersionControlPlugin::NormalVersion:          iconName = "vcs-normal"; break;
 167             case KVersionControlPlugin::UpdateRequiredVersion:  iconName = "vcs-update-required"; break;
 168             case KVersionControlPlugin::LocallyModifiedVersion: iconName = "vcs-locally-modified"; break;
 169             case KVersionControlPlugin::AddedVersion:           iconName = "vcs-added"; break;
 170             case KVersionControlPlugin::RemovedVersion:         iconName = "vcs-removed"; break;
 171             case KVersionControlPlugin::ConflictingVersion:     iconName = "vcs-conflicting"; break;
 172             case KVersionControlPlugin::UnversionedVersion:
 173             default:                                            Q_ASSERT(false); break;
 174             }
 175
 176             m_cachedEmblems[i] = KIcon(iconName).pixmap(emblemSize);
 177         }
 178     }
 179     return m_cachedEmblems[state];
 180 }
 181