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::queryString() 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
  89     return comp.prefix + descr.identifier() + comp.operation +
  90            '"' + m_valueWidget->value() + '"';
  91 }
  92
  93 void SearchCriterionSelector::slotDescriptionChanged(int index)
  94 {
  95     if (m_valueWidget != 0) {
  96         m_valueWidget->hide();
  97         m_layout->removeWidget(m_valueWidget);
  98         m_valueWidget = 0;
  99         // the value widget is obtained by the Search Criterion
 100         // Selector instance and may not get deleted
 101     }
 102
 103     // add comparator items
 104     disconnect(m_comparatorBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotComparatorChanged(int)));
 105     m_comparatorBox->clear();
 106
 107     const SearchCriterionDescription& description = m_descriptions[index];
 108     foreach (const SearchCriterionDescription::Comparator& comp, description.comparators()) {
 109         m_comparatorBox->addItem(comp.name);
 110     }
 111
 112     // add value widget
 113     m_valueWidget = description.valueWidget();
 114     m_layout->insertWidget(2, m_valueWidget);
 115
 116     m_comparatorBox->setCurrentIndex(0);
 117     slotComparatorChanged(0);
 118     connect(m_comparatorBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotComparatorChanged(int)));
 119 }
 120
 121 void SearchCriterionSelector::slotComparatorChanged(int index)
 122 {
 123     Q_ASSERT(index >= 0);
 124
 125     // only show the value widget if an operation is defined by the comparator
 126     const int descIndex = m_descriptionsBox->currentIndex();
 127     const SearchCriterionDescription& descr = m_descriptions[descIndex];
 128     const SearchCriterionDescription::Comparator& comp = descr.comparators()[index];
 129     m_valueWidget->setVisible(!comp.operation.isEmpty());
 130
 131     emit criterionChanged();
 132 }
 133
 134 void SearchCriterionSelector::createDescriptions()
 135 {
 136     Q_ASSERT(m_descriptionsBox != 0);
 137     Q_ASSERT(m_comparatorBox != 0);
 138
 139     // TODO: maybe this creation should be forwarded to a factory if
 140     // the number of items increases in future
 141     QList<SearchCriterionDescription::Comparator> defaultComps;
 142     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Greater Than"), ">", "+"));
 143     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Greater Than or Equal to"), ">=", "+"));
 144     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Less Than"), "<", "+"));
 145     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Less Than or Equal to"), "<=", "+"));
 146
 147     // add "Date" description
 148     QList<SearchCriterionDescription::Comparator> dateComps;
 149     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Anytime"))); // TODO
 150     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Today"))); // TODO
 151     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "This week"))); // TODO
 152     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "This month"))); // TODO
 153     foreach (const SearchCriterionDescription::Comparator& comp, defaultComps) {
 154         dateComps.append(comp);
 155     }
 156
 157     DateValue* dateValue = new DateValue(this);
 158     dateValue->hide();
 159     SearchCriterionDescription date(i18nc("@label", "Date:"),
 160                                     "lastModified",
 161                                     dateComps,
 162                                     dateValue);
 163
 164     // add "Size" description
 165     QList<SearchCriterionDescription::Comparator> sizeComps = defaultComps;
 166     sizeComps.insert(0, SearchCriterionDescription::Comparator(i18nc("@label Any (file size)", "Any")));
 167
 168     SizeValue* sizeValue = new SizeValue(this);
 169     sizeValue->hide();
 170     SearchCriterionDescription size(i18nc("@label", "Size:"),
 171                                     "contentSize",
 172                                     sizeComps,
 173                                     sizeValue);
 174
 175     // add "Tag" description
 176     QList<SearchCriterionDescription::Comparator> tagComps;
 177     tagComps.append(SearchCriterionDescription::Comparator(i18nc("@label All (tags)", "All")));
 178     tagComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Equal to"), ":"));
 179
 180     TagValue* tagValue = new TagValue(this);
 181     tagValue->hide();
 182     SearchCriterionDescription tag(i18nc("@label", "Tag:"),
 183                                    "tag",
 184                                    tagComps,
 185                                    tagValue);
 186
 187     Q_ASSERT(static_cast<int>(SearchCriterionSelector::Date) == 0);
 188     Q_ASSERT(static_cast<int>(SearchCriterionSelector::Size) == 1);
 189     Q_ASSERT(static_cast<int>(SearchCriterionSelector::Tag) == 2);
 190     m_descriptions.append(date);
 191     m_descriptions.append(size);
 192     m_descriptions.append(tag);
 193
 194     // add all descriptions to the combo box and connect the value widgets
 195     int i = 0;
 196     foreach (const SearchCriterionDescription& desc, m_descriptions) {
 197         m_descriptionsBox->addItem(desc.name(), i);
 198         connect(desc.valueWidget(), SIGNAL(valueChanged(QString)), this, SIGNAL(criterionChanged()));
 199         ++i;
 200     }
 201 }
 202
 203 #include "searchcriterionselector.moc"