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/***************************************************************************
* Copyright (C) 2009 by Adam Kidder <[email protected]> *
* Copyright (C) 2009 by Peter Penz <[email protected]> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
***************************************************************************/
#include "searchcriterionselector.h"
#include "searchcriterionvalue.h"
#include <QComboBox>
#include <QHBoxLayout>
#include <QList>
#include <QPushButton>
#include <kicon.h>
#include <klocale.h>
SearchCriterionSelector::SearchCriterionSelector(QWidget* parent) :
QWidget(parent),
m_layout(0),
m_descriptionsBox(0),
m_comparatorBox(0),
m_valueWidget(0),
m_removeButton(0),
m_descriptions()
{
m_descriptionsBox = new QComboBox(this);
m_descriptionsBox->addItem(i18nc("@label", "Select..."), -1);
createDescriptions();
connect(m_descriptionsBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotDescriptionChanged(int)));
m_comparatorBox = new QComboBox(this);
m_comparatorBox->hide();
connect(m_comparatorBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateQuery()));
QWidget* filler = new QWidget(this);
filler->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
m_removeButton = new QPushButton(this);
m_removeButton->setIcon(KIcon("list-remove"));
m_removeButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
connect(m_removeButton, SIGNAL(clicked()), this, SIGNAL(removeCriterion()));
m_layout = new QHBoxLayout(this);
m_layout->setMargin(0);
m_layout->addWidget(m_descriptionsBox);
m_layout->addWidget(m_comparatorBox);
m_layout->addWidget(filler);
m_layout->addWidget(m_removeButton);
setLayout(m_layout);
}
SearchCriterionSelector::~SearchCriterionSelector()
{
}
void SearchCriterionSelector::createDescriptions()
{
// TODO: maybe this creation should be forwarded to a factory if
// the number of items increases in future
QList<SearchCriterionDescription::Comparator> comparators;
comparators.append(SearchCriterionDescription::Comparator(i18nc("@label", "greater than"), ">", "+"));
comparators.append(SearchCriterionDescription::Comparator(i18nc("@label", "greater than or equal to"), ">=", "+"));
comparators.append(SearchCriterionDescription::Comparator(i18nc("@label", "less than"), "<", "+"));
comparators.append(SearchCriterionDescription::Comparator(i18nc("@label", "less than or equal to"), "<=", "+"));
// add "Date" description
DateValue* dateValue = new DateValue(this);
dateValue->hide();
SearchCriterionDescription date(i18nc("@label", "Date Modified"),
"sourceModified",
comparators,
dateValue);
// add "File Size" description
FileSizeValue* fileSizeValue = new FileSizeValue(this);
fileSizeValue->hide();
SearchCriterionDescription size(i18nc("@label", "File Size"),
"contentSize",
comparators,
fileSizeValue);
m_descriptions.append(date);
m_descriptions.append(size);
// add all descriptions to the combo box
const int count = m_descriptions.count();
for (int i = 0; i < count; ++i) {
m_descriptionsBox->addItem(m_descriptions[i].name(), i);
}
}
void SearchCriterionSelector::slotDescriptionChanged(int index)
{
m_comparatorBox->clear();
m_comparatorBox->show();
if (m_valueWidget != 0) {
m_layout->removeWidget(m_valueWidget);
// the value widget is obtained by the Search Criterion
// Selector instance and may not get deleted
}
// adjust the comparator box and the value widget dependent from the selected description
m_comparatorBox->addItem(i18nc("@label", "Select..."), -1);
const int descrIndex = m_descriptionsBox->itemData(index).toInt();
if (descrIndex >= 0) {
// add comparator items
const SearchCriterionDescription& description = m_descriptions[descrIndex];
foreach (const SearchCriterionDescription::Comparator& comp, description.comparators()) {
m_comparatorBox->addItem(comp.name);
}
// add value widget
m_valueWidget = description.valueWidget();
const int layoutIndex = m_layout->count() - 2;
m_layout->insertWidget(layoutIndex, m_valueWidget);
m_valueWidget->show();
}
}
void SearchCriterionSelector::updateQuery()
{
const SearchCriterionDescription* descr = description();
if (descr == 0) {
// no description has been selected
return;
}
// get selected comparator related to the description
const int compBoxIndex = m_comparatorBox->currentIndex();
const int compIndex = m_comparatorBox->itemData(compBoxIndex).toInt();
if (compIndex < 0) {
// no comparator has been selected
return;
}
// create query string
const SearchCriterionDescription::Comparator& comp = descr->comparators()[compIndex];
const QString queryString = comp.prefix + descr->identifier() + comp.operation + m_valueWidget->value();
emit criterionChanged(queryString);
}
const SearchCriterionDescription* SearchCriterionSelector::description() const
{
const int descrBoxIndex = m_descriptionsBox->currentIndex();
const int descrIndex = m_descriptionsBox->itemData(descrBoxIndex).toInt();
return (descrIndex < 0) ? 0 : &m_descriptions[descrIndex];
}
#include "searchcriterionselector.moc"
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