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->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
  57     connect(m_removeButton, SIGNAL(clicked()), this, SIGNAL(removeCriterion()));
  58
  59     m_layout = new QHBoxLayout(this);
  60     m_layout->setMargin(0);
  61     m_layout->addWidget(m_descriptionsBox);
  62     m_layout->addWidget(m_comparatorBox);
  63     m_layout->addWidget(filler);
  64     m_layout->addWidget(m_removeButton);
  65
  66     setLayout(m_layout);
  67
  68     slotDescriptionChanged(index);
  69     connect(m_descriptionsBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotDescriptionChanged(int)));
  70 }
  71
  72 SearchCriterionSelector::~SearchCriterionSelector()
  73 {
  74 }
  75
  76 void SearchCriterionSelector::createDescriptions()
  77 {
  78     Q_ASSERT(m_descriptionsBox != 0);
  79     Q_ASSERT(m_comparatorBox != 0);
  80
  81     // TODO: maybe this creation should be forwarded to a factory if
  82     // the number of items increases in future
  83     QList<SearchCriterionDescription::Comparator> defaultComps;
  84     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Greater Than"), ">", "+"));
  85     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Greater Than or Equal to"), ">=", "+"));
  86     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Less Than"), "<", "+"));
  87     defaultComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Less Than or Equal to"), "<=", "+"));
  88
  89     // add "Date" description
  90     QList<SearchCriterionDescription::Comparator> dateComps;
  91     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Anytime"))); // TODO
  92     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Today"))); // TODO
  93     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "This week"))); // TODO
  94     dateComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "This month"))); // TODO
  95     foreach (const SearchCriterionDescription::Comparator& comp, defaultComps) {
  96         dateComps.append(comp);
  97     }
  98
  99     DateValue* dateValue = new DateValue(this);
 100     dateValue->hide();
 101     SearchCriterionDescription date(i18nc("@label", "Date"),
 102                                     "sourceModified",
 103                                     dateComps,
 104                                     dateValue);
 105
 106     // add "Size" description
 107     QList<SearchCriterionDescription::Comparator> sizeComps = defaultComps;
 108     sizeComps.insert(0, SearchCriterionDescription::Comparator(i18nc("@label Any (file size)", "Any")));
 109
 110     SizeValue* sizeValue = new SizeValue(this);
 111     sizeValue->hide();
 112     SearchCriterionDescription size(i18nc("@label", "Size"),
 113                                     "contentSize",
 114                                     sizeComps,
 115                                     sizeValue);
 116
 117     // add "Tag" description
 118     QList<SearchCriterionDescription::Comparator> tagComps;
 119     tagComps.append(SearchCriterionDescription::Comparator(i18nc("@label All (tags)", "All")));
 120     tagComps.append(SearchCriterionDescription::Comparator(i18nc("@label", "Equal to"), "=="));
 121
 122     TagValue* tagValue = new TagValue(this);
 123     tagValue->hide();
 124     SearchCriterionDescription tag(i18nc("@label", "Tag"),
 125                                    "tag",
 126                                    tagComps,
 127                                    tagValue);
 128
 129     Q_ASSERT(static_cast<int>(SearchCriterionSelector::Date) == 0);
 130     Q_ASSERT(static_cast<int>(SearchCriterionSelector::Size) == 1);
 131     Q_ASSERT(static_cast<int>(SearchCriterionSelector::Tag) == 2);
 132     m_descriptions.append(date);
 133     m_descriptions.append(size);
 134     m_descriptions.append(tag);
 135
 136     // add all descriptions to the combo box
 137     const int count = m_descriptions.count();
 138     for (int i = 0; i < count; ++i) {
 139         m_descriptionsBox->addItem(m_descriptions[i].name(), i);
 140     }
 141 }
 142
 143 void SearchCriterionSelector::slotDescriptionChanged(int index)
 144 {
 145     if (m_valueWidget != 0) {
 146         m_valueWidget->hide();
 147         m_layout->removeWidget(m_valueWidget);
 148         m_valueWidget = 0;
 149         // the value widget is obtained by the Search Criterion
 150         // Selector instance and may not get deleted
 151     }
 152
 153     // add comparator items
 154     disconnect(m_comparatorBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotComparatorChanged(int)));
 155     m_comparatorBox->clear();
 156
 157     const SearchCriterionDescription& description = m_descriptions[index];
 158     foreach (const SearchCriterionDescription::Comparator& comp, description.comparators()) {
 159         m_comparatorBox->addItem(comp.name);
 160     }
 161
 162     // add value widget
 163     m_valueWidget = description.valueWidget();
 164     m_layout->insertWidget(2, m_valueWidget);
 165
 166     m_comparatorBox->setCurrentIndex(0);
 167     slotComparatorChanged(0);
 168     connect(m_comparatorBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotComparatorChanged(int)));
 169 }
 170
 171 void SearchCriterionSelector::slotComparatorChanged(int index)
 172 {
 173     Q_ASSERT(index >= 0);
 174
 175     // only show the value widget if an operation is defined by the comparator
 176     const int descIndex = m_descriptionsBox->currentIndex();
 177     const SearchCriterionDescription& descr = m_descriptions[descIndex];
 178     const SearchCriterionDescription::Comparator& comp = descr.comparators()[index];
 179     m_valueWidget->setVisible(!comp.operation.isEmpty());
 180
 181     // create query string
 182     const QString queryString = comp.prefix + descr.identifier() + comp.operation + m_valueWidget->value();
 183     emit criterionChanged(queryString);
 184 }
 185
 186 #include "searchcriterionselector.moc"