src/search/searchcriterionselector.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2009 by Adam Kidder <thekidder@gmail.com>               *
   3  *   Copyright (C) 2009 by Peter Penz <peter.penz@gmx.at>                  *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program 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         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  19  ***************************************************************************/
  20
  21 #include "searchcriterionselector.h"
  22
  23 #define DISABLE_NEPOMUK_LEGACY
  24 #include <nepomuk/comparisonterm.h>
  25 #include <nepomuk/literalterm.h>
  26 #include <nepomuk/query.h>
  27
  28 #include "searchcriterionvalue.h"
  29
  30 #include <Soprano/LiteralValue>
  31 #include <Soprano/Vocabulary/NAO>
  32
  33 #include <QComboBox>
  34 #include <QHBoxLayout>
  35 #include <QList>
  36 #include <QPushButton>
  37
  38 #include <kicon.h>
  39 #include <klocale.h>
  40
  41 SearchCriterionSelector::SearchCriterionSelector(Type type, QWidget* parent) :
  42     QWidget(parent),
  43     m_layout(0),
  44     m_descriptionsBox(0),
  45     m_comparatorBox(0),
  46     m_valueWidget(0),
  47     m_removeButton(0),
  48     m_descriptions()
  49 {
  50     m_descriptionsBox = new QComboBox(this);
  51
  52     m_comparatorBox = new QComboBox(this);
  53     m_comparatorBox->setSizeAdjustPolicy(QComboBox::AdjustToContents);
  54
  55     createDescriptions();
  56     const int index = static_cast<int>(type);
  57     m_descriptionsBox->setCurrentIndex(index);
  58
  59     QWidget* filler = new QWidget(this);
  60     filler->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
  61
  62     m_removeButton = new QPushButton(this);
  63     m_removeButton->setIcon(KIcon("list-remove"));
  64     m_removeButton->setToolTip(i18nc("@info", "Remove search option"));
  65     m_removeButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
  66     connect(m_removeButton, SIGNAL(clicked()), this, SIGNAL(removeCriterion()));
  67
  68     m_layout = new QHBoxLayout(this);
  69     m_layout->setMargin(0);
  70     m_layout->addWidget(m_removeButton);
  71     m_layout->addWidget(m_descriptionsBox);
  72     m_layout->addWidget(m_comparatorBox);
  73     m_layout->addWidget(filler);
  74
  75     setLayout(m_layout);
  76
  77     slotDescriptionChanged(index);
  78     connect(m_descriptionsBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotDescriptionChanged(int)));
  79 }
  80
  81 SearchCriterionSelector::~SearchCriterionSelector()
  82 {
  83 }
  84
  85 Nepomuk::Query::Term SearchCriterionSelector::queryTerm() const
  86 {
  87     if (m_valueWidget == 0) {
  88         return Nepomuk::Query::Term();
  89     }
  90
  91     const int descIndex = m_descriptionsBox->currentIndex();
  92     const SearchCriterionDescription& descr = m_descriptions[descIndex];
  93
  94     const int compIndex = m_comparatorBox->currentIndex();
  95     const SearchCriterionDescription::Comparator& comp = descr.comparators()[compIndex];
  96     if (comp.operation.isEmpty()) {
  97         return Nepomuk::Query::Term();
  98     }
  99
 100     Nepomuk::Query::LiteralTerm literalTerm(Soprano::LiteralValue("dummy"));
 101     Nepomuk::Query::ComparisonTerm term(Soprano::Vocabulary::NAO::lastModified(),
 102                                         literalTerm,
 103                                         Nepomuk::Query::ComparisonTerm::Smaller);
 104     return term;
 105 /*
 106     QString criterion = comp.prefix + descr.identifier() + comp.operation;
 107     if (!m_valueWidget->value().isEmpty()) {
 108         const QString value = m_valueWidget->value();
 109         if (value.contains(' ')) {
 110             criterion += '"' + value + '"';
 111         } else {
 112             // Don't surround the value by " if no space is part of the value.
 113             // This increases the readability of the search-URL.
 114             criterion += value;
 115         }
 116     }
 117     return criterion;*/
 118 }
 119
 120 SearchCriterionSelector::Type SearchCriterionSelector::type() const
 121 {
 122     return static_cast<Type>(m_descriptionsBox->currentIndex());
 123 }
 124
 125 void SearchCriterionSelector::slotDescriptionChanged(int index)
 126 {
 127     if (m_valueWidget != 0) {
 128         m_valueWidget->hide();
 129         m_layout->removeWidget(m_valueWidget);
 130         m_valueWidget = 0;
 131         // the value widget is obtained by the Search Criterion
 132         // Selector instance and may not get deleted
 133     }
 134
 135     // add comparator items
 136     disconnect(m_comparatorBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotComparatorChanged(int)));
 137     m_comparatorBox->clear();
 138
 139     const SearchCriterionDescription& description = m_descriptions[index];
 140     foreach (const SearchCriterionDescription::Comparator& comp, description.comparators()) {
 141         m_comparatorBox->addItem(comp.name);
 142     }
 143
 144     // add value widget
 145     m_valueWidget = description.valueWidget();
 146     m_layout->insertWidget(3, m_valueWidget);
 147
 148     m_comparatorBox->setCurrentIndex(0);
 149     slotComparatorChanged(0);
 150     connect(m_comparatorBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotComparatorChanged(int)));
 151 }
 152
 153 void SearchCriterionSelector::slotComparatorChanged(int index)
 154 {
 155     Q_ASSERT(index >= 0);
 156
 157     // only show the value widget if an operation is defined by the comparator
 158     const int descIndex = m_descriptionsBox->currentIndex();
 159     const SearchCriterionDescription& descr = m_descriptions[descIndex];
 160     const SearchCriterionDescription::Comparator& comp = descr.comparators()[index];
 161
 162     m_valueWidget->initializeValue(comp.autoValueType);
 163     // only show the value widget, if an operation is defined
 164     // and no automatic calculation is provided
 165     m_valueWidget->setVisible(!comp.operation.isEmpty() && comp.autoValueType.isEmpty());
 166
 167     emit criterionChanged();
 168 }
 169
 170 void SearchCriterionSelector::createDescriptions()
 171 {
 172     Q_ASSERT(m_descriptionsBox != 0);
 173     Q_ASSERT(m_comparatorBox != 0);
 174
 175     // TODO: maybe this creation should be forwarded to a factory if
 176     // the number of items increases in future
 177     QList<SearchCriterionDescription::Comparator> defaultComps;
 178     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Greater Than"), ">", "+"));
 179     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Greater Than or Equal to"), ">=", "+"));
 180     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Less Than"), "<", "+"));
 181     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Less Than or Equal to"), "<=", "+"));
 182
 183     // add "Date" description
 184     QList<SearchCriterionDescription::Comparator> dateComps;
 185     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Anytime")));
 186     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Today"), ":", "+", "today"));
 187     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "This Week"), ">=", "+", "thisWeek"));
 188     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "This Month"), ">=", "+", "thisMonth"));
 189     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "This Year"), ">=", "+", "thisYear"));
 190     foreach (const SearchCriterionDescription::Comparator& comp, defaultComps) {
 191         dateComps.append(comp);
 192     }
 193
 194     DateValue* dateValue = new DateValue(this);
 195     dateValue->hide();
 196     SearchCriterionDescription date(i18nc("@label", "Date:"),
 197                                     "lastModified",
 198                                     dateComps,
 199                                     dateValue);
 200     Q_ASSERT(static_cast<int>(SearchCriterionSelector::Date) == 0);
 201     m_descriptions.append(date);
 202
 203     // add "Size" description
 204     QList<SearchCriterionDescription::Comparator> sizeComps = defaultComps;
 205     sizeComps.insert(0, SearchCriterionDescription::Comparator(i18nc("@label Any (file size)", "Any")));
 206
 207     SizeValue* sizeValue = new SizeValue(this);
 208     sizeValue->hide();
 209     SearchCriterionDescription size(i18nc("@label", "Size:"),
 210                                     "contentSize",
 211                                     sizeComps,
 212                                     sizeValue);
 213     Q_ASSERT(static_cast<int>(SearchCriterionSelector::Size) == 1);
 214     m_descriptions.append(size);
 215
 216     // add "Tag" description
 217     QList<SearchCriterionDescription::Comparator> tagComps;
 218     tagComps.append(SearchCriterionDescription::Comparator(i18nc("@label All (tags)", "All")));
 219     tagComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Equal to"), ":", "+"));
 220     tagComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Not Equal to"), ":", "-"));
 221
 222     TagValue* tagValue = new TagValue(this);
 223     tagValue->hide();
 224     SearchCriterionDescription tag(i18nc("@label", "Tag:"),
 225                                    "tag",
 226                                    tagComps,
 227                                    tagValue);
 228     Q_ASSERT(static_cast<int>(SearchCriterionSelector::Tag) == 2);
 229     m_descriptions.append(tag);
 230
 231     // add "Rating" description
 232     QList<SearchCriterionDescription::Comparator> ratingComps = defaultComps;
 233     ratingComps.insert(0, SearchCriterionDescription::Comparator(i18nc("@label Any (rating)", "Any")));
 234
 235     RatingValue* ratingValue = new RatingValue(this);
 236     ratingValue->hide();
 237     SearchCriterionDescription rating(i18nc("@label", "Rating:"),
 238                                       "rating",
 239                                       ratingComps,
 240                                       ratingValue);
 241     Q_ASSERT(static_cast<int>(SearchCriterionSelector::Rating) == 3);
 242     m_descriptions.append(rating);
 243
 244     // add all descriptions to the combo box and connect the value widgets
 245     int i = 0;
 246     foreach (const SearchCriterionDescription& desc, m_descriptions) {
 247         m_descriptionsBox->addItem(desc.name(), i);
 248         connect(desc.valueWidget(), SIGNAL(valueChanged(QString)), this, SIGNAL(criterionChanged()));
 249         ++i;
 250     }
 251 }
 252
 253 #include "searchcriterionselector.moc"