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#ifndef CVVISUAL_PORTIONSELECTOR_HPP
#define CVVISUAL_PORTIONSELECTOR_HPP
#include <vector>
#include <algorithm>
#include <limits>
#include <QWidget>
#include <QDoubleSpinBox>
#include <QRadioButton>
#include <QCheckBox>
#include <QLabel>
#include <QVBoxLayout>
#include <QButtonGroup>
#include "../util/util.hpp"
#include "../util/observer_ptr.hpp"
#include "signalslot.hpp"
namespace cvv
{
namespace qtutil
{
/**
* @brief Provides a function to select a portion of a set.
*
* The highest | lowest n ^ n% of a given selection can be selected.
* Optionally the complement can be used.
*/
class PortionSelector : public QWidget
{
public:
/**
* @brief Constructor
* @param parent Parent widget
*/
PortionSelector(QWidget *parent = nullptr)
: QWidget{ parent }, sigSettingsChanged_{}, highest_{ nullptr },
lowest_{ nullptr }, complement_{ nullptr },
percentVal_{ nullptr }, numberVal_{ nullptr },
percent_{ nullptr }, number_{ nullptr },
bgroupNumberPerc_{ util::make_unique<QButtonGroup>() }
{
// create elements
auto highest = util::make_unique<QCheckBox>("highest");
auto lowest = util::make_unique<QCheckBox>("lowest");
auto complement =
util::make_unique<QCheckBox>("select the complement");
auto percentVal = util::make_unique<QDoubleSpinBox>();
auto numberVal = util::make_unique<QSpinBox>();
auto percent = util::make_unique<QRadioButton>("(100*n)%");
auto number = util::make_unique<QRadioButton>("n");
highest_ = *highest;
lowest_ = *lowest;
complement_ = *complement;
percentVal_ = *percentVal;
numberVal_ = *numberVal;
percent_ = *percent;
number_ = *number;
// button group
bgroupNumberPerc_->addButton(number.get());
bgroupNumberPerc_->addButton(percent.get());
bgroupNumberPerc_->setExclusive(true);
// connect subwidgets
QObject::connect(number_.getPtr(), SIGNAL(toggled(bool)),
numberVal_.getPtr(), SLOT(setVisible(bool)));
QObject::connect(percent_.getPtr(), SIGNAL(toggled(bool)),
percentVal_.getPtr(), SLOT(setVisible(bool)));
// settings
percentVal->setRange(0, 1);
percentVal->setSingleStep(0.01);
numberVal->setRange(0, std::numeric_limits<int>::max());
number_->setChecked(true);
percentVal_->setVisible(false);
numberVal_->setVisible(true);
// connect state changed
QObject::connect(highest.get(), SIGNAL(clicked()),
&sigSettingsChanged_, SIGNAL(signal()));
QObject::connect(lowest.get(), SIGNAL(clicked()),
&sigSettingsChanged_, SIGNAL(signal()));
QObject::connect(bgroupNumberPerc_.get(),
SIGNAL(buttonClicked(int)),
&sigSettingsChanged_, SIGNAL(signal()));
QObject::connect(numberVal.get(), SIGNAL(valueChanged(int)),
&sigSettingsChanged_, SIGNAL(signal()));
QObject::connect(percentVal.get(), SIGNAL(valueChanged(double)),
&sigSettingsChanged_, SIGNAL(signal()));
QObject::connect(complement.get(), SIGNAL(clicked()),
&sigSettingsChanged_, SIGNAL(signal()));
// build ui
auto lay = util::make_unique<QVBoxLayout>();
lay->setContentsMargins(0, 0, 0, 0);
lay->addWidget(
util::make_unique<QLabel>("select the").release());
lay->addWidget(highest.release());
lay->addWidget(lowest.release());
lay->addWidget(number.release());
lay->addWidget(percent.release());
lay->addWidget(util::make_unique<QLabel>("with n =").release());
lay->addWidget(numberVal.release());
lay->addWidget(percentVal.release());
lay->addWidget(complement.release());
setLayout(lay.release());
}
/**
* @brief Returns elements from the selected range.
* @param selection The selection.
* @param comp Comparison function object used for sorting
* (bool cmp(const Type &a, const Type &b))
* @return the selected values
*/
template <class Type, class Compare>
std::vector<Type> select(std::vector<Type> selection,
Compare comp) const
{
// number
int n = numberVal_->value();
if (percent_->isChecked())
{
n = (percentVal_->value()) * selection.size();
}
std::sort(selection.begin(),selection.end(),comp);
// lowest selected value
std::size_t lower = (lowest_->isChecked()) ? n : 0;
// highest selected value
std::size_t upper =
selection.size() - ((highest_->isChecked()) ? n : 0);
// element
bool complement = complement_->isChecked();
// filter
std::vector<Type> result;
for (std::size_t i = 0; i < selection.size(); i++)
{
if (complement != ((i < lower) || (i >= upper)))
{
// copy value
result.push_back(selection.at(i));
}
}
return result;
}
/**
* @brief Returns the signal emitted when settings are changed.
* @return The signal emitted when settings are changed.
*/
const Signal &signalSettingsChanged() const
{
return sigSettingsChanged_;
}
private:
/**
* @brief Emitted when settings are changed.
*/
const Signal sigSettingsChanged_;
/**
* @brief Whether the highest elements should be selected
*/
util::ObserverPtr<QCheckBox> highest_;
/**
* @brief Whether the lowest should be selected
*/
util::ObserverPtr<QCheckBox> lowest_;
/**
* @brief Whether the complement should be selected
*/
util::ObserverPtr<QCheckBox> complement_;
/**
* @brief The percent value
*/
util::ObserverPtr<QDoubleSpinBox> percentVal_;
/**
* @brief The number of elements
*/
util::ObserverPtr<QSpinBox> numberVal_;
/**
* @brief Whether the percent value should be used
*/
util::ObserverPtr<QRadioButton> percent_;
/**
* @brief Whether the number value should be used
*/
util::ObserverPtr<QRadioButton> number_;
/**
* @brief Button group for number/percentage
*/
std::unique_ptr<QButtonGroup> bgroupNumberPerc_;
};
}
} // namespace cvv, namespace qtutil
#endif // CVVISUAL_PORTIONSELECTOR_HPP