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 #include "searchcriterionvalue.h"
  24
  25 #include <QComboBox>
  26 #include <QHBoxLayout>
  27 #include <QList>
  28 #include <QPushButton>
  29
  30 #include <kicon.h>
  31 #include <klocale.h>
  32
  33 SearchCriterionSelector::SearchCriterionSelector(Type type, QWidget* parent) :
  34     QWidget(parent),
  35     m_layout(0),
  36     m_descriptionsBox(0),
  37     m_comparatorBox(0),
  38     m_valueWidget(0),
  39     m_removeButton(0),
  40     m_descriptions()
  41 {
  42     m_descriptionsBox = new QComboBox(this);
  43
  44     m_comparatorBox = new QComboBox(this);
  45     m_comparatorBox->setSizeAdjustPolicy(QComboBox::AdjustToContents);
  46
  47     createDescriptions();
  48     const int index = static_cast<int>(type);
  49     m_descriptionsBox->setCurrentIndex(index);
  50
  51     QWidget* filler = new QWidget(this);
  52     filler->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
  53
  54     m_removeButton = new QPushButton(this);
  55     m_removeButton->setIcon(KIcon("list-remove"));
  56     m_removeButton->setToolTip(i18nc("@info", "Remove search option"));
  57     m_removeButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
  58     connect(m_removeButton, SIGNAL(clicked()), this, SIGNAL(removeCriterion()));
  59
  60     m_layout = new QHBoxLayout(this);
  61     m_layout->setMargin(0);
  62     m_layout->addWidget(m_descriptionsBox);
  63     m_layout->addWidget(m_comparatorBox);
  64     m_layout->addWidget(filler);
  65     m_layout->addWidget(m_removeButton);
  66
  67     setLayout(m_layout);
  68
  69     slotDescriptionChanged(index);
  70     connect(m_descriptionsBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotDescriptionChanged(int)));
  71 }
  72
  73 SearchCriterionSelector::~SearchCriterionSelector()
  74 {
  75 }
  76
  77 QString SearchCriterionSelector::toString() const
  78 {
  79     if (m_valueWidget == 0) {
  80         return QString();
  81     }
  82
  83     const int descIndex = m_descriptionsBox->currentIndex();
  84     const SearchCriterionDescription& descr = m_descriptions[descIndex];
  85
  86     const int compIndex = m_comparatorBox->currentIndex();
  87     const SearchCriterionDescription::Comparator& comp = descr.comparators()[compIndex];
  88     if (comp.operation.isEmpty()) {
  89         return QString();
  90     }
  91
  92     QString criterion = comp.prefix + descr.identifier() + comp.operation;
  93     if (!m_valueWidget->value().isEmpty()) {
  94         criterion += '"' + m_valueWidget->value() + '"';
  95     }
  96     return criterion;
  97 }
  98
  99 void SearchCriterionSelector::slotDescriptionChanged(int index)
 100 {
 101     if (m_valueWidget != 0) {
 102         m_valueWidget->hide();
 103         m_layout->removeWidget(m_valueWidget);
 104         m_valueWidget = 0;
 105         // the value widget is obtained by the Search Criterion
 106         // Selector instance and may not get deleted
 107     }
 108
 109     // add comparator items
 110     disconnect(m_comparatorBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotComparatorChanged(int)));
 111     m_comparatorBox->clear();
 112
 113     const SearchCriterionDescription& description = m_descriptions[index];
 114     foreach (const SearchCriterionDescription::Comparator& comp, description.comparators()) {
 115         m_comparatorBox->addItem(comp.name);
 116     }
 117
 118     // add value widget
 119     m_valueWidget = description.valueWidget();
 120     m_layout->insertWidget(2, m_valueWidget);
 121
 122     m_comparatorBox->setCurrentIndex(0);
 123     slotComparatorChanged(0);
 124     connect(m_comparatorBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotComparatorChanged(int)));
 125 }
 126
 127 void SearchCriterionSelector::slotComparatorChanged(int index)
 128 {
 129     Q_ASSERT(index >= 0);
 130
 131     // only show the value widget if an operation is defined by the comparator
 132     const int descIndex = m_descriptionsBox->currentIndex();
 133     const SearchCriterionDescription& descr = m_descriptions[descIndex];
 134     const SearchCriterionDescription::Comparator& comp = descr.comparators()[index];
 135     m_valueWidget->setVisible(!comp.operation.isEmpty());
 136
 137     emit criterionChanged();
 138 }
 139
 140 void SearchCriterionSelector::createDescriptions()
 141 {
 142     Q_ASSERT(m_descriptionsBox != 0);
 143     Q_ASSERT(m_comparatorBox != 0);
 144
 145     // TODO: maybe this creation should be forwarded to a factory if
 146     // the number of items increases in future
 147     QList<SearchCriterionDescription::Comparator> defaultComps;
 148     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Greater Than"), ">", "+"));
 149     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Greater Than or Equal to"), ">=", "+"));
 150     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Less Than"), "<", "+"));
 151     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Less Than or Equal to"), "<=", "+"));
 152
 153     // add "Date" description
 154     QList<SearchCriterionDescription::Comparator> dateComps;
 155     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Anytime"))); // TODO
 156     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Today"))); // TODO
 157     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "This week"))); // TODO
 158     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "This month"))); // TODO
 159     foreach (const SearchCriterionDescription::Comparator& comp, defaultComps) {
 160         dateComps.append(comp);
 161     }
 162
 163     DateValue* dateValue = new DateValue(this);
 164     dateValue->hide();
 165     SearchCriterionDescription date(i18nc("@label", "Date:"),
 166                                     "lastModified",
 167                                     dateComps,
 168                                     dateValue);
 169
 170     // add "Size" description
 171     QList<SearchCriterionDescription::Comparator> sizeComps = defaultComps;
 172     sizeComps.insert(0, SearchCriterionDescription::Comparator(i18nc("@label Any (file size)", "Any")));
 173
 174     SizeValue* sizeValue = new SizeValue(this);
 175     sizeValue->hide();
 176     SearchCriterionDescription size(i18nc("@label", "Size:"),
 177                                     "contentSize",
 178                                     sizeComps,
 179                                     sizeValue);
 180
 181     // add "Tag" description
 182     QList<SearchCriterionDescription::Comparator> tagComps;
 183     tagComps.append(SearchCriterionDescription::Comparator(i18nc("@label All (tags)", "All")));
 184     tagComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Equal to"), ":"));
 185
 186     TagValue* tagValue = new TagValue(this);
 187     tagValue->hide();
 188     SearchCriterionDescription tag(i18nc("@label", "Tag:"),
 189                                    "tag",
 190                                    tagComps,
 191                                    tagValue);
 192
 193     Q_ASSERT(static_cast<int>(SearchCriterionSelector::Date) == 0);
 194     Q_ASSERT(static_cast<int>(SearchCriterionSelector::Size) == 1);
 195     Q_ASSERT(static_cast<int>(SearchCriterionSelector::Tag) == 2);
 196     m_descriptions.append(date);
 197     m_descriptions.append(size);
 198     m_descriptions.append(tag);
 199
 200     // add all descriptions to the combo box and connect the value widgets
 201     int i = 0;
 202     foreach (const SearchCriterionDescription& desc, m_descriptions) {
 203         m_descriptionsBox->addItem(desc.name(), i);
 204         connect(desc.valueWidget(), SIGNAL(valueChanged(QString)), this, SIGNAL(criterionChanged()));
 205         ++i;
 206     }
 207 }
 208
 209 #include "searchcriterionselector.moc"