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	Add a model that keeps track of a list of filter constraint and makes them accessible from Qt. Sadly, this is mostly repetitive boiler-plate code, but this is due to Qt's model/view-API, which is a perfect example of how *not* to design a reasonable modern API. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
		
			
				
	
	
		
			186 lines
		
	
	
	
		
			6.2 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			186 lines
		
	
	
	
		
			6.2 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
| // SPDX-License-Identifier: GPL-2.0
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| #include "filterconstraintmodel.h"
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| #include "core/qthelper.h"	// for timestamp conversions
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| #include <QTime>
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| 
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| FilterConstraintModel::~FilterConstraintModel()
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| {
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| }
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| 
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| // QTime <-> seconds in integer conversion functions
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| static QTime secondsToTime(int seconds)
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| {
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| 	return QTime::fromMSecsSinceStartOfDay(seconds * 1000);
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| }
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| 
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| static int timeToSeconds(const QTime &t)
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| {
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| 	return t.msecsSinceStartOfDay() / 1000;
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| }
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| 
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| QVariant FilterConstraintModel::data(const QModelIndex &index, int role) const
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| {
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| 	if (!index.isValid() || index.row() >= (int)constraints.size())
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| 		return QVariant();
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| 
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| 	const filter_constraint &constraint = constraints[index.row()];
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| 
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| 	switch (role) {
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| 	case TYPE_ROLE:
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| 		return constraint.type;
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| 	case IS_STAR_WIDGET_ROLE:
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| 		return filter_constraint_is_star(constraint.type);
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| 	case HAS_DATE_WIDGET_ROLE:
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| 		return filter_constraint_has_date_widget(constraint.type);
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| 	case HAS_TIME_WIDGET_ROLE:
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| 		return filter_constraint_has_time_widget(constraint.type);
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| 	case NUM_DECIMALS_ROLE:
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| 		return filter_constraint_num_decimals(constraint.type);
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| 	case NEGATE_COMBO_ROLE:
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| 		return filter_constraint_negate_list_translated();
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| 	case STRING_MODE_COMBO_ROLE:
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| 		return filter_constraint_has_string_mode(constraint.type) ?
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| 			filter_constraint_string_mode_list_translated() : QStringList();
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| 	case RANGE_MODE_COMBO_ROLE:
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| 		return filter_constraint_has_range_mode(constraint.type) ?
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| 			filter_constraint_range_mode_list_translated() : QStringList();
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| 	case MULTIPLE_CHOICE_LIST_ROLE:
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| 		return filter_contraint_multiple_choice_translated(constraint.type);
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| 	case STRING_MODE_ROLE:
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| 		return static_cast<int>(constraint.string_mode);
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| 	case RANGE_MODE_ROLE:
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| 		return static_cast<int>(constraint.range_mode);
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| 	case TYPE_DISPLAY_ROLE:
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| 		return filter_constraint_type_to_string_translated(constraint.type);
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| 	case NEGATE_DISPLAY_ROLE:
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| 		return filter_constraint_negate_to_string_translated(constraint.negate);
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| 	case STRING_MODE_DISPLAY_ROLE:
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| 		return filter_constraint_string_mode_to_string_translated(constraint.string_mode);
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| 	case RANGE_MODE_DISPLAY_ROLE:
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| 		return filter_constraint_range_mode_to_string_translated(constraint.range_mode);
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| 	case TYPE_INDEX_ROLE:
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| 		return filter_constraint_type_to_index(constraint.type);
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| 	case NEGATE_INDEX_ROLE:
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| 		return static_cast<int>(constraint.negate);
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| 	case STRING_MODE_INDEX_ROLE:
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| 		return filter_constraint_string_mode_to_index(constraint.string_mode);
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| 	case RANGE_MODE_INDEX_ROLE:
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| 		return filter_constraint_range_mode_to_index(constraint.range_mode);
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| 	case UNIT_ROLE:
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| 		return filter_constraint_get_unit(constraint.type);
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| 	case STRING_ROLE:
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| 		return filter_constraint_get_string(constraint);
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| 	case INTEGER_FROM_ROLE:
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| 		return filter_constraint_get_integer_from(constraint);
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| 	case INTEGER_TO_ROLE:
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| 		return filter_constraint_get_integer_to(constraint);
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| 	case FLOAT_FROM_ROLE:
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| 		return filter_constraint_get_float_from(constraint); // Converts from integers to metric or imperial units
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| 	case FLOAT_TO_ROLE:
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| 		return filter_constraint_get_float_to(constraint); // Converts from integers to metric or imperial units
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| 	case TIMESTAMP_FROM_ROLE:
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| 		return timestampToDateTime(filter_constraint_get_timestamp_from(constraint));
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| 	case TIMESTAMP_TO_ROLE:
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| 		return timestampToDateTime(filter_constraint_get_timestamp_to(constraint));
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| 	case TIME_FROM_ROLE:
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| 		return secondsToTime(filter_constraint_get_integer_from(constraint));
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| 	case TIME_TO_ROLE:
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| 		return secondsToTime(filter_constraint_get_integer_from(constraint));
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| 	case MULTIPLE_CHOICE_ROLE:
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| 		return (qulonglong)filter_constraint_get_multiple_choice(constraint);
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| 	}
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| 	return QVariant();
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| }
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| 
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| bool FilterConstraintModel::setData(const QModelIndex &index, const QVariant &value, int role)
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| {
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| 	if (!index.isValid() || index.row() > (int)constraints.size())
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| 		return false;
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| 	filter_constraint &constraint = constraints[index.row()];
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| 
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| 	switch (role) {
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| 	case NEGATE_INDEX_ROLE:
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| 		constraint.negate = value.value<bool>();
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| 		break;
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| 	case STRING_ROLE:
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| 		filter_constraint_set_stringlist(constraint, value.value<QString>());
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| 		break;
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| 	case STRING_MODE_INDEX_ROLE:
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| 		constraint.string_mode = filter_constraint_string_mode_from_index(value.value<int>());
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| 		break;
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| 	case RANGE_MODE_INDEX_ROLE:
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| 		constraint.range_mode = filter_constraint_range_mode_from_index(value.value<int>());
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| 		break;
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| 	case INTEGER_FROM_ROLE:
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| 		filter_constraint_set_integer_from(constraint, value.value<int>());
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| 		break;
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| 	case INTEGER_TO_ROLE:
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| 		filter_constraint_set_integer_to(constraint, value.value<int>());
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| 		break;
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| 	case FLOAT_FROM_ROLE:
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| 		filter_constraint_set_float_from(constraint, value.value<double>());
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| 		break;
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| 	case FLOAT_TO_ROLE:
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| 		filter_constraint_set_float_to(constraint, value.value<double>());
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| 		break;
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| 	case TIMESTAMP_FROM_ROLE:
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| 		filter_constraint_set_timestamp_from(constraint, dateTimeToTimestamp(value.value<QDateTime>()));
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| 		break;
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| 	case TIMESTAMP_TO_ROLE:
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| 		filter_constraint_set_timestamp_to(constraint, dateTimeToTimestamp(value.value<QDateTime>()));
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| 		break;
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| 	case TIME_FROM_ROLE:
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| 		filter_constraint_set_integer_from(constraint, timeToSeconds(value.value<QTime>()));
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| 		break;
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| 	case TIME_TO_ROLE:
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| 		filter_constraint_set_integer_to(constraint, timeToSeconds(value.value<QTime>()));
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| 		break;
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| 	case MULTIPLE_CHOICE_ROLE:
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| 		filter_constraint_set_multiple_choice(constraint, value.value<uint64_t>());
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| 		break;
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| 	default:
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| 		return false;
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| 	}
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| 	emit dataChanged(index, index, QVector<int> { role });
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| 	return true;
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| }
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| 
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| int FilterConstraintModel::rowCount(const QModelIndex&) const
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| {
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| 	return constraints.size();
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| }
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| 
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| void FilterConstraintModel::reload(const std::vector<filter_constraint> &constraintsIn)
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| {
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| 	beginResetModel();
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| 	constraints = constraintsIn;
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| 	endResetModel();
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| }
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| 
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| std::vector<filter_constraint> FilterConstraintModel::getConstraints() const
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| {
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| 	std::vector<filter_constraint> res;
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| 	res.reserve(constraints.size());
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| 	for (const filter_constraint &c: constraints) {
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| 		if (filter_constraint_is_valid(&c))
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| 			res.push_back(c);
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| 	}
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| 	return res;
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| }
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| 
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| void FilterConstraintModel::addConstraint(filter_constraint_type type)
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| {
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| 	int count = (int)constraints.size();
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| 	beginInsertRows(QModelIndex(), count, count);
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| 	constraints.emplace_back(type);
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| 	endInsertRows();
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| }
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| 
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| void FilterConstraintModel::deleteConstraint(int row)
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| {
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| 	if (row < 0 || row >= (int)constraints.size())
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| 		return;
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| 	beginRemoveRows(QModelIndex(), row, row);
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| 	constraints.erase(constraints.begin() + row);
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| 	endRemoveRows();
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| }
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