kernel-shark/src/KsAdvFilteringDialog.cpp - platform/external/trace-cmd - Git at Google

 // SPDX-License-Identifier: LGPL-2.1

 /*
  * Copyright (C) 2017 VMware Inc, Yordan Karadzhov <ykaradzhov@vmware.com>
  */

 /**
  *  @file    KsAdvFilteringDialog.cpp
  *  @brief   GUI Dialog for Advanced filtering settings.
  */

 // KernelShark
 #include "KsAdvFilteringDialog.hpp"
 #include "libkshark.h"
 #include "KsUtils.hpp"

 /** Create dialog for Advanced Filtering. */
 KsAdvFilteringDialog::KsAdvFilteringDialog(QWidget *parent)
 : QDialog(parent),
   _condToolBar1(this),
   _condToolBar2(this),
   _condToolBar3(this),
   _descrLabel(this),
   _sysEvLabel("System/Event: ", &_condToolBar1),
   _opsLabel("Operator: ", this),
   _fieldLabel("Field: ", this),
   _systemComboBox(&_condToolBar1),
   _eventComboBox(&_condToolBar1),
   _opsComboBox(&_condToolBar2),
   _fieldComboBox(&_condToolBar3),
   _filterEdit(this),
   _helpButton("Show Help", this),
   _insertEvtButton("Insert", this),
   _insertOpButton("Insert", this),
   _insertFieldButton("Insert", this),
   _applyButton("Apply", this),
   _cancelButton("Cancel", this)
 {
 	struct kshark_context *kshark_ctx(NULL);
 	int buttonWidth;

 	if (!kshark_instance(&kshark_ctx))
 		return;

 	auto lamAddLine = [&] {
 		QFrame* line = new QFrame();
 		line->setFrameShape(QFrame::HLine);
 		line->setFrameShadow(QFrame::Sunken);
 		_topLayout.addWidget(line);
 	};

 	setMinimumWidth(FONT_WIDTH * 80);

 	buttonWidth = STRING_WIDTH("--Show Help--");

 	_helpButton.setFixedWidth(buttonWidth);
 	_helpButton.setDefault(false);
 	_topLayout.addWidget(&_helpButton);

 	connect(&_helpButton,	&QPushButton::pressed,
 		this,		&KsAdvFilteringDialog::_help);

 	_descrLabel.setText(_description());
 	_topLayout.addWidget(&_descrLabel);

 	/*
 	 * For the moment do not show the syntax description. It will be shown
 	 * only if the "Show Help" button is clicked.
 	 */
 	_descrLabel.hide();

 	lamAddLine();

 	_getFilters(kshark_ctx);

 	if (_filters.count()) {
 		_makeFilterTable(kshark_ctx);
 		lamAddLine();
 	}

 	_condToolBar1.addWidget(&_sysEvLabel);
 	_condToolBar1.addWidget(&_systemComboBox);
 	_condToolBar1.addWidget(&_eventComboBox);

 	/*
 	 * Using the old Signal-Slot syntax because QComboBox::currentIndexChanged
 	 * has overloads.
 	 */
 	connect(&_systemComboBox,	SIGNAL(currentIndexChanged(const QString&)),
 		this,			SLOT(_systemChanged(const QString&)));

 	connect(&_eventComboBox,	SIGNAL(currentIndexChanged(const QString&)),
 		this,			SLOT(_eventChanged(const QString&)));

 	_setSystemCombo(kshark_ctx);

 	_condToolBar1.addSeparator();
 	_condToolBar1.addWidget(&_insertEvtButton);
 	_topLayout.addWidget(&_condToolBar1);

 	_opsComboBox.addItems(_operators());

 	_condToolBar2.addWidget(&_opsLabel);
 	_condToolBar2.addWidget(&_opsComboBox);

 	_condToolBar2.addSeparator();
 	_condToolBar2.addWidget(&_insertOpButton);
 	_topLayout.addWidget(&_condToolBar2);

 	_condToolBar3.addWidget(&_fieldLabel);
 	_condToolBar3.addWidget(&_fieldComboBox);

 	_condToolBar3.addSeparator();
 	_condToolBar3.addWidget(&_insertFieldButton);
 	_topLayout.addWidget(&_condToolBar3);

 	lamAddLine();

 	_filterEdit.setMinimumWidth(50 * FONT_WIDTH);
 	_topLayout.addWidget(&_filterEdit);
 	this->setLayout(&_topLayout);

 	buttonWidth = STRING_WIDTH("--Cancel--");
 	_applyButton.setFixedWidth(buttonWidth);
 	_applyButton.setDefault(true);
 	_cancelButton.setFixedWidth(buttonWidth);
 	_buttonLayout.addWidget(&_applyButton);
 	_buttonLayout.addWidget(&_cancelButton);
 	_buttonLayout.setAlignment(Qt::AlignLeft);
 	_topLayout.addLayout(&_buttonLayout);

 	connect(&_insertEvtButton,	&QPushButton::pressed,
 		this,			&KsAdvFilteringDialog::_insertEvt);

 	connect(&_insertOpButton,	&QPushButton::pressed,
 		this,			&KsAdvFilteringDialog::_insertOperator);

 	connect(&_insertFieldButton,	&QPushButton::pressed,
 		this,			&KsAdvFilteringDialog::_insertField);

 	_applyButtonConnection =
 		connect(&_applyButton,	&QPushButton::pressed,
 			this,		&KsAdvFilteringDialog::_applyPress);

 	connect(&_applyButton,		&QPushButton::pressed,
 		this,			&QWidget::close);

 	connect(&_cancelButton,		&QPushButton::pressed,
 		this,			&QWidget::close);
 }

 void KsAdvFilteringDialog::_setSystemCombo(struct kshark_context *kshark_ctx)
 {
 	QStringList sysList;
 	tep_event **events;
 	int i(0), nEvts(0);

 	if (kshark_ctx->pevent) {
 		nEvts = tep_get_events_count(kshark_ctx->pevent);
 		events = tep_list_events(kshark_ctx->pevent,
 					 TEP_EVENT_SORT_SYSTEM);
 	}

 	while (i < nEvts) {
 		QString sysName(events[i]->system);
 		sysList << sysName;
 		while (sysName == events[i]->system) {
 			if (++i == nEvts)
 				break;
 		}
 	}

 	qSort(sysList);
 	_systemComboBox.addItems(sysList);

 	i = _systemComboBox.findText("ftrace");
 	if (i >= 0)
 		_systemComboBox.setCurrentIndex(i);
 }

 QString KsAdvFilteringDialog::_description()
 {
 	QString descrText = "Usage:\n";
 	descrText += " <sys/event>[,<sys/event>] : [!][(]<field><op><val>[)]";
 	descrText += "[&&/|| [(]<field><op><val>[)]]\n\n";
 	descrText += "Examples:\n\n";
 	descrText += "   sched/sched_switch : next_prio < 100 && (prev_prio > 100";
 	descrText += "&& prev_pid != 0)\n\n";
 	descrText += "   irq.* : irq != 38\n\n";
 	descrText += "   .* : common_pid == 1234\n";

 	return descrText;
 }

 QStringList KsAdvFilteringDialog::_operators()
 {
 	QStringList OpsList;
 	OpsList << ":" << "," << "==" << "!=" << ">" << "<" << ">=" << "<=";
 	OpsList << "=~" << "!~" << "!" << "(" << ")" << "+" << "-";
 	OpsList << "*" << "/" << "<<" << ">>" << "&&" << "||" << "&";

 	return OpsList;
 }

 void KsAdvFilteringDialog::_getFilters(struct kshark_context *kshark_ctx)
 {
 	tep_event **events;
 	char *str;

 	events = tep_list_events(kshark_ctx->pevent, TEP_EVENT_SORT_SYSTEM);

 	for (int i = 0; events[i]; i++) {
 		str = tep_filter_make_string(kshark_ctx->advanced_event_filter,
 					     events[i]->id);
 		if (!str)
 			continue;

 		_filters.insert(events[i]->id,
 				QString("%1/%2:%3\n").arg(events[i]->system,
 							  events[i]->name, str));

 		free(str);
 	}
 }

 void KsAdvFilteringDialog::_makeFilterTable(struct kshark_context *kshark_ctx)
 {
 	QMapIterator<int, QString> f(_filters);
 	QTableWidgetItem *i1, *i2, *i3;
 	QStringList headers;
 	int count(0);

 	_table = new KsCheckBoxTable(this);
 	_table->setSelectionMode(QAbstractItemView::SingleSelection);
 	headers << "Delete" << "Event" << " Id" << "Filter";
 	_table->init(headers, _filters.count());

 	for(auto f : _filters.keys()) {
 		QStringList thisFilter = _filters.value(f).split(":");

 		i1 = new QTableWidgetItem(thisFilter[0]);
 		_table->setItem(count, 1, i1);

 		i2 = new QTableWidgetItem(tr("%1").arg(f));
 		_table->setItem(count, 2, i2);

 		i3 = new QTableWidgetItem(thisFilter[1]);
 		_table->setItem(count, 3, i3);

 		++count;
 	}

 	_table->setVisible(false);
 	_table->resizeColumnsToContents();
 	_table->setVisible(true);

 	_topLayout.addWidget(_table);
 }

 void KsAdvFilteringDialog::_help()
 {
 	if (_descrLabel.isVisible()) {
 		_descrLabel.hide();
 		QApplication::processEvents();

 		_helpButton.setText("Show Help");
 		resize(width(), _noHelpHeight);
 	} else {
 		_helpButton.setText("Hide Help");
 		_noHelpHeight = height();
 		_descrLabel.show();
 	}
 }

 void KsAdvFilteringDialog::_systemChanged(const QString &sysName)
 {
 	kshark_context *kshark_ctx(NULL);
 	QStringList evtsList;
 	tep_event **events;
 	int i, nEvts;

 	_eventComboBox.clear();
 	if (!kshark_instance(&kshark_ctx) || !kshark_ctx->pevent)
 		return;

 	nEvts = tep_get_events_count(kshark_ctx->pevent);
 	events = tep_list_events(kshark_ctx->pevent, TEP_EVENT_SORT_SYSTEM);

 	for (i = 0; i < nEvts; ++i) {
 		if (sysName == events[i]->system)
 			evtsList << events[i]->name;
 	}

 	qSort(evtsList);
 	_eventComboBox.addItems(evtsList);

 	i = _eventComboBox.findText("function");
 	if (i >= 0)
 		_eventComboBox.setCurrentIndex(i);
 }

 QStringList
 KsAdvFilteringDialog::_getEventFormatFields(struct tep_event *event)
 {
 	tep_format_field *field, **fields = tep_event_fields(event);
 	QStringList fieldList;

 	for (field = *fields; field; field = field->next)
 		fieldList << field->name;

 	free(fields);

 	qSort(fieldList);
 	return fieldList;
 }

 void KsAdvFilteringDialog::_eventChanged(const QString &evtName)
 {
 	QString sysName = _systemComboBox.currentText();
 	kshark_context *kshark_ctx(NULL);
 	QStringList fieldList;
 	tep_event **events;
 	int nEvts;

 	_fieldComboBox.clear();
 	if (!kshark_instance(&kshark_ctx) || !kshark_ctx->pevent)
 		return;

 	nEvts = tep_get_events_count(kshark_ctx->pevent);
 	events = tep_list_events(kshark_ctx->pevent, TEP_EVENT_SORT_SYSTEM);

 	for (int i = 0; i < nEvts; ++i) {
 		if (evtName == events[i]->name &&
 		    sysName == events[i]->system) {
 			fieldList = _getEventFormatFields(events[i]);
 			_fieldComboBox.addItems(fieldList);

 			return;
 		}
 	}
 }

 void KsAdvFilteringDialog::_insertEvt()
 {
 	QString text = _filterEdit.text();

 	auto set_evt = [&] ()
 	{
 		text += _systemComboBox.currentText();
 		text += "/";
 		text += _eventComboBox.currentText();
 	};

 	if (text == "") {
 		set_evt();
 		text += ":";
 	} else {
 		QString evt = text;
 		text = "";
 		set_evt();
 		text += ",";
 		text += evt;
 	}
 	_filterEdit.setText(text);
 }

 void KsAdvFilteringDialog::_insertOperator()
 {
 	QString text = _filterEdit.text();

 	text += _opsComboBox.currentText();
 	_filterEdit.setText(text);
 }

 void KsAdvFilteringDialog::_insertField()
 {
 	QString text = _filterEdit.text();

 	text += _fieldComboBox.currentText();
 	_filterEdit.setText(text);
 }

 void KsAdvFilteringDialog::_applyPress()
 {
 	QMapIterator<int, QString> f(_filters);
 	kshark_context *kshark_ctx(NULL);
 	const char *text;
 	tep_errno ret;
 	char *filter;
 	int i(0);

 	if (!kshark_instance(&kshark_ctx))
 		return;

 	while (f.hasNext()) {
 		f.next();
 		if (_table->_cb[i]->checkState() == Qt::Checked) {
 			tep_filter_remove_event(kshark_ctx->advanced_event_filter,
 						f.key());
 		}
 		++i;
 	}

 	auto job_done = [&]() {
 		/*
 		* Disconnect Apply button. This is done in order to protect
 		* against multiple clicks.
 		*/
 		disconnect(_applyButtonConnection);
 		emit dataReload();
 	};

 	text = _filterEdit.text().toLocal8Bit().data();
 	if (strlen(text) == 0) {
 		job_done();
 		return;
 	}

 	filter = (char*) malloc(strlen(text) + 1);
 	strcpy(filter, text);

 	ret = tep_filter_add_filter_str(kshark_ctx->advanced_event_filter,
 					   filter);

 	if (ret < 0) {
 		char error_str[200];

 		tep_strerror(kshark_ctx->pevent, ret, error_str,
 						       sizeof(error_str));

 		fprintf(stderr, "filter failed due to: %s\n", error_str);
 		free(filter);

 		return;
 	}

 	free(filter);

 	job_done();
 }
	// SPDX-License-Identifier: LGPL-2.1

	/*
	* Copyright (C) 2017 VMware Inc, Yordan Karadzhov <ykaradzhov@vmware.com>
	*/

	/**
	* @file KsAdvFilteringDialog.cpp
	* @brief GUI Dialog for Advanced filtering settings.
	*/

	// KernelShark
	#include "KsAdvFilteringDialog.hpp"
	#include "libkshark.h"
	#include "KsUtils.hpp"

	/** Create dialog for Advanced Filtering. */
	KsAdvFilteringDialog::KsAdvFilteringDialog(QWidget *parent)
	: QDialog(parent),
	_condToolBar1(this),
	_condToolBar2(this),
	_condToolBar3(this),
	_descrLabel(this),
	_sysEvLabel("System/Event: ", &_condToolBar1),
	_opsLabel("Operator: ", this),
	_fieldLabel("Field: ", this),
	_systemComboBox(&_condToolBar1),
	_eventComboBox(&_condToolBar1),
	_opsComboBox(&_condToolBar2),
	_fieldComboBox(&_condToolBar3),
	_filterEdit(this),
	_helpButton("Show Help", this),
	_insertEvtButton("Insert", this),
	_insertOpButton("Insert", this),
	_insertFieldButton("Insert", this),
	_applyButton("Apply", this),
	_cancelButton("Cancel", this)
	{
	struct kshark_context *kshark_ctx(NULL);
	int buttonWidth;

	if (!kshark_instance(&kshark_ctx))
	return;

	auto lamAddLine = [&] {
	QFrame* line = new QFrame();
	line->setFrameShape(QFrame::HLine);
	line->setFrameShadow(QFrame::Sunken);
	_topLayout.addWidget(line);
	};

	setMinimumWidth(FONT_WIDTH * 80);

	buttonWidth = STRING_WIDTH("--Show Help--");

	_helpButton.setFixedWidth(buttonWidth);
	_helpButton.setDefault(false);
	_topLayout.addWidget(&_helpButton);

	connect(&_helpButton, &QPushButton::pressed,
	this, &KsAdvFilteringDialog::_help);

	_descrLabel.setText(_description());
	_topLayout.addWidget(&_descrLabel);

	/*
	* For the moment do not show the syntax description. It will be shown
	* only if the "Show Help" button is clicked.
	*/
	_descrLabel.hide();

	lamAddLine();

	_getFilters(kshark_ctx);

	if (_filters.count()) {
	_makeFilterTable(kshark_ctx);
	lamAddLine();
	}

	_condToolBar1.addWidget(&_sysEvLabel);
	_condToolBar1.addWidget(&_systemComboBox);
	_condToolBar1.addWidget(&_eventComboBox);

	/*
	* Using the old Signal-Slot syntax because QComboBox::currentIndexChanged
	* has overloads.
	*/
	connect(&_systemComboBox, SIGNAL(currentIndexChanged(const QString&)),
	this, SLOT(_systemChanged(const QString&)));

	connect(&_eventComboBox, SIGNAL(currentIndexChanged(const QString&)),
	this, SLOT(_eventChanged(const QString&)));

	_setSystemCombo(kshark_ctx);

	_condToolBar1.addSeparator();
	_condToolBar1.addWidget(&_insertEvtButton);
	_topLayout.addWidget(&_condToolBar1);

	_opsComboBox.addItems(_operators());

	_condToolBar2.addWidget(&_opsLabel);
	_condToolBar2.addWidget(&_opsComboBox);

	_condToolBar2.addSeparator();
	_condToolBar2.addWidget(&_insertOpButton);
	_topLayout.addWidget(&_condToolBar2);

	_condToolBar3.addWidget(&_fieldLabel);
	_condToolBar3.addWidget(&_fieldComboBox);

	_condToolBar3.addSeparator();
	_condToolBar3.addWidget(&_insertFieldButton);
	_topLayout.addWidget(&_condToolBar3);

	lamAddLine();

	_filterEdit.setMinimumWidth(50 * FONT_WIDTH);
	_topLayout.addWidget(&_filterEdit);
	this->setLayout(&_topLayout);

	buttonWidth = STRING_WIDTH("--Cancel--");
	_applyButton.setFixedWidth(buttonWidth);
	_applyButton.setDefault(true);
	_cancelButton.setFixedWidth(buttonWidth);
	_buttonLayout.addWidget(&_applyButton);
	_buttonLayout.addWidget(&_cancelButton);
	_buttonLayout.setAlignment(Qt::AlignLeft);
	_topLayout.addLayout(&_buttonLayout);

	connect(&_insertEvtButton, &QPushButton::pressed,
	this, &KsAdvFilteringDialog::_insertEvt);

	connect(&_insertOpButton, &QPushButton::pressed,
	this, &KsAdvFilteringDialog::_insertOperator);

	connect(&_insertFieldButton, &QPushButton::pressed,
	this, &KsAdvFilteringDialog::_insertField);

	_applyButtonConnection =
	connect(&_applyButton, &QPushButton::pressed,
	this, &KsAdvFilteringDialog::_applyPress);

	connect(&_applyButton, &QPushButton::pressed,
	this, &QWidget::close);

	connect(&_cancelButton, &QPushButton::pressed,
	this, &QWidget::close);
	}

	void KsAdvFilteringDialog::_setSystemCombo(struct kshark_context *kshark_ctx)
	{
	QStringList sysList;
	tep_event **events;
	int i(0), nEvts(0);

	if (kshark_ctx->pevent) {
	nEvts = tep_get_events_count(kshark_ctx->pevent);
	events = tep_list_events(kshark_ctx->pevent,
	TEP_EVENT_SORT_SYSTEM);
	}

	while (i < nEvts) {
	QString sysName(events[i]->system);
	sysList << sysName;
	while (sysName == events[i]->system) {
	if (++i == nEvts)
	break;
	}
	}

	qSort(sysList);
	_systemComboBox.addItems(sysList);

	i = _systemComboBox.findText("ftrace");
	if (i >= 0)
	_systemComboBox.setCurrentIndex(i);
	}

	QString KsAdvFilteringDialog::_description()
	{
	QString descrText = "Usage:\n";
	descrText += " <sys/event>[,<sys/event>] : [!][(]<field><op><val>[)]";
	descrText += "[&&/\|\| [(]<field><op><val>[)]]\n\n";
	descrText += "Examples:\n\n";
	descrText += " sched/sched_switch : next_prio < 100 && (prev_prio > 100";
	descrText += "&& prev_pid != 0)\n\n";
	descrText += " irq.* : irq != 38\n\n";
	descrText += " .* : common_pid == 1234\n";

	return descrText;
	}

	QStringList KsAdvFilteringDialog::_operators()
	{
	QStringList OpsList;
	OpsList << ":" << "," << "==" << "!=" << ">" << "<" << ">=" << "<=";
	OpsList << "=~" << "!~" << "!" << "(" << ")" << "+" << "-";
	OpsList << "*" << "/" << "<<" << ">>" << "&&" << "\|\|" << "&";

	return OpsList;
	}

	void KsAdvFilteringDialog::_getFilters(struct kshark_context *kshark_ctx)
	{
	tep_event **events;
	char *str;

	events = tep_list_events(kshark_ctx->pevent, TEP_EVENT_SORT_SYSTEM);

	for (int i = 0; events[i]; i++) {
	str = tep_filter_make_string(kshark_ctx->advanced_event_filter,
	events[i]->id);
	if (!str)
	continue;

	_filters.insert(events[i]->id,
	QString("%1/%2:%3\n").arg(events[i]->system,
	events[i]->name, str));

	free(str);
	}
	}

	void KsAdvFilteringDialog::_makeFilterTable(struct kshark_context *kshark_ctx)
	{
	QMapIterator<int, QString> f(_filters);
	QTableWidgetItem i1, i2, *i3;
	QStringList headers;
	int count(0);

	_table = new KsCheckBoxTable(this);
	_table->setSelectionMode(QAbstractItemView::SingleSelection);
	headers << "Delete" << "Event" << " Id" << "Filter";
	_table->init(headers, _filters.count());

	for(auto f : _filters.keys()) {
	QStringList thisFilter = _filters.value(f).split(":");

	i1 = new QTableWidgetItem(thisFilter[0]);
	_table->setItem(count, 1, i1);

	i2 = new QTableWidgetItem(tr("%1").arg(f));
	_table->setItem(count, 2, i2);

	i3 = new QTableWidgetItem(thisFilter[1]);
	_table->setItem(count, 3, i3);

	++count;
	}

	_table->setVisible(false);
	_table->resizeColumnsToContents();
	_table->setVisible(true);

	_topLayout.addWidget(_table);
	}

	void KsAdvFilteringDialog::_help()
	{
	if (_descrLabel.isVisible()) {
	_descrLabel.hide();
	QApplication::processEvents();

	_helpButton.setText("Show Help");
	resize(width(), _noHelpHeight);
	} else {
	_helpButton.setText("Hide Help");
	_noHelpHeight = height();
	_descrLabel.show();
	}
	}

	void KsAdvFilteringDialog::_systemChanged(const QString &sysName)
	{
	kshark_context *kshark_ctx(NULL);
	QStringList evtsList;
	tep_event **events;
	int i, nEvts;

	_eventComboBox.clear();
	if (!kshark_instance(&kshark_ctx) \|\| !kshark_ctx->pevent)
	return;

	nEvts = tep_get_events_count(kshark_ctx->pevent);
	events = tep_list_events(kshark_ctx->pevent, TEP_EVENT_SORT_SYSTEM);

	for (i = 0; i < nEvts; ++i) {
	if (sysName == events[i]->system)
	evtsList << events[i]->name;
	}

	qSort(evtsList);
	_eventComboBox.addItems(evtsList);

	i = _eventComboBox.findText("function");
	if (i >= 0)
	_eventComboBox.setCurrentIndex(i);
	}

	QStringList
	KsAdvFilteringDialog::_getEventFormatFields(struct tep_event *event)
	{
	tep_format_field field, *fields = tep_event_fields(event);
	QStringList fieldList;

	for (field = *fields; field; field = field->next)
	fieldList << field->name;

	free(fields);

	qSort(fieldList);
	return fieldList;
	}

	void KsAdvFilteringDialog::_eventChanged(const QString &evtName)
	{
	QString sysName = _systemComboBox.currentText();
	kshark_context *kshark_ctx(NULL);
	QStringList fieldList;
	tep_event **events;
	int nEvts;

	_fieldComboBox.clear();
	if (!kshark_instance(&kshark_ctx) \|\| !kshark_ctx->pevent)
	return;

	nEvts = tep_get_events_count(kshark_ctx->pevent);
	events = tep_list_events(kshark_ctx->pevent, TEP_EVENT_SORT_SYSTEM);

	for (int i = 0; i < nEvts; ++i) {
	if (evtName == events[i]->name &&
	sysName == events[i]->system) {
	fieldList = _getEventFormatFields(events[i]);
	_fieldComboBox.addItems(fieldList);

	return;
	}
	}
	}

	void KsAdvFilteringDialog::_insertEvt()
	{
	QString text = _filterEdit.text();

	auto set_evt = [&] ()
	{
	text += _systemComboBox.currentText();
	text += "/";
	text += _eventComboBox.currentText();
	};

	if (text == "") {
	set_evt();
	text += ":";
	} else {
	QString evt = text;
	text = "";
	set_evt();
	text += ",";
	text += evt;
	}
	_filterEdit.setText(text);
	}

	void KsAdvFilteringDialog::_insertOperator()
	{
	QString text = _filterEdit.text();

	text += _opsComboBox.currentText();
	_filterEdit.setText(text);
	}

	void KsAdvFilteringDialog::_insertField()
	{
	QString text = _filterEdit.text();

	text += _fieldComboBox.currentText();
	_filterEdit.setText(text);
	}

	void KsAdvFilteringDialog::_applyPress()
	{
	QMapIterator<int, QString> f(_filters);
	kshark_context *kshark_ctx(NULL);
	const char *text;
	tep_errno ret;
	char *filter;
	int i(0);

	if (!kshark_instance(&kshark_ctx))
	return;

	while (f.hasNext()) {
	f.next();
	if (_table->_cb[i]->checkState() == Qt::Checked) {
	tep_filter_remove_event(kshark_ctx->advanced_event_filter,
	f.key());
	}
	++i;
	}

	auto job_done = [&]() {
	/*
	* Disconnect Apply button. This is done in order to protect
	* against multiple clicks.
	*/
	disconnect(_applyButtonConnection);
	emit dataReload();
	};

	text = _filterEdit.text().toLocal8Bit().data();
	if (strlen(text) == 0) {
	job_done();
	return;
	}

	filter = (char*) malloc(strlen(text) + 1);
	strcpy(filter, text);

	ret = tep_filter_add_filter_str(kshark_ctx->advanced_event_filter,
	filter);

	if (ret < 0) {
	char error_str[200];

	tep_strerror(kshark_ctx->pevent, ret, error_str,
	sizeof(error_str));

	fprintf(stderr, "filter failed due to: %s\n", error_str);
	free(filter);

	return;
	}

	free(filter);

	job_done();
	}