[pulseview.git] / pv / subwindows / decoder_selector / subwindow.cpp

/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2018 Soeren Apel <soeren@apelpie.net>
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#include <algorithm>

#include <QApplication>
#include <QDebug>
#include <QFontMetrics>
#include <QInputDialog>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QScrollArea>
#include <QVBoxLayout>

#include "pv/session.hpp"
#include "pv/subwindows/decoder_selector/subwindow.hpp"

using std::reverse;
using std::shared_ptr;

namespace pv {
namespace subwindows {
namespace decoder_selector {

const char *initial_notice =
	QT_TRANSLATE_NOOP("pv::subwindows::decoder_selector::SubWindow", "Select a decoder to see its description here.");

const int min_width_margin = 75;


bool QCustomSortFilterProxyModel::filterAcceptsRow(int source_row,
	const QModelIndex& source_parent) const
{
	// Search model recursively

	if (QSortFilterProxyModel::filterAcceptsRow(source_row, source_parent))
		return true;

	const QModelIndex index = sourceModel()->index(source_row, 0, source_parent);

	for (int i = 0; i < sourceModel()->rowCount(index); i++)
		if (filterAcceptsRow(i, index))
			return true;

	return false;
}


void QCustomTreeView::currentChanged(const QModelIndex& current,
	const QModelIndex& previous)
{
	QTreeView::currentChanged(current, previous);
	currentChanged(current);
}


SubWindow::SubWindow(Session& session, QWidget* parent) :
	SubWindowBase(session, parent),
	splitter_(new QSplitter()),
	tree_view_(new QCustomTreeView()),
	info_box_(new QWidget()),
	info_label_header_(new QLabel()),
	info_label_body_(new QLabel()),
	info_label_footer_(new QLabel()),
	model_(new DecoderCollectionModel()),
	sort_filter_model_(new QCustomSortFilterProxyModel())
{
	QVBoxLayout* root_layout = new QVBoxLayout(this);
	root_layout->setContentsMargins(0, 0, 0, 0);
	root_layout->addWidget(splitter_);

	QWidget* upper_container = new QWidget();
	QVBoxLayout* upper_layout = new QVBoxLayout(upper_container);
	upper_layout->setContentsMargins(0, 5, 0, 0);
	QLineEdit* filter = new QLineEdit();
	upper_layout->addWidget(filter);
	upper_layout->addWidget(tree_view_);

	splitter_->setOrientation(Qt::Vertical);
	splitter_->addWidget(upper_container);
	splitter_->addWidget(info_box_);

	const QIcon filter_icon(QIcon::fromTheme("search",
		QIcon(":/icons/search.svg")));
	filter->setClearButtonEnabled(true);
	filter->addAction(filter_icon, QLineEdit::LeadingPosition);

	sort_filter_model_->setSourceModel(model_);
	sort_filter_model_->setFilterCaseSensitivity(Qt::CaseInsensitive);
	sort_filter_model_->setFilterKeyColumn(-1);

	tree_view_->setModel(sort_filter_model_);
	tree_view_->setRootIsDecorated(true);
	tree_view_->setSortingEnabled(true);
	tree_view_->sortByColumn(0, Qt::AscendingOrder);

	// Hide the columns that hold the detailed item information
	tree_view_->hideColumn(2);  // ID

	// Ensure that all decoder tag names are fully visible by default
	tree_view_->resizeColumnToContents(0);

	tree_view_->setIndentation(10);

	QScrollArea* info_label_body_container = new QScrollArea();
	info_label_body_container->setWidget(info_label_body_);
	info_label_body_container->setWidgetResizable(true);

	info_box_->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
	QVBoxLayout* info_box_layout = new QVBoxLayout(info_box_);
	info_box_layout->addWidget(info_label_header_);
	info_box_layout->addWidget(info_label_body_container);
	info_box_layout->addWidget(info_label_footer_);
	info_box_layout->setAlignment(Qt::AlignTop);
	Qt::TextInteractionFlags flags = Qt::TextSelectableByMouse | Qt::TextSelectableByKeyboard;
	info_label_header_->setWordWrap(true);
	info_label_header_->setTextInteractionFlags(flags);
	info_label_body_->setWordWrap(true);
	info_label_body_->setTextInteractionFlags(flags);
	info_label_body_->setText(QString(tr(initial_notice)));
	info_label_body_->setAlignment(Qt::AlignTop);
	info_label_footer_->setWordWrap(true);
	info_label_footer_->setTextInteractionFlags(flags);

	connect(filter, SIGNAL(textChanged(const QString&)),
		this, SLOT(on_filter_changed(const QString&)));
	connect(filter, SIGNAL(returnPressed()),
		this, SLOT(on_filter_return_pressed()));

	connect(tree_view_, SIGNAL(currentChanged(const QModelIndex&)),
		this, SLOT(on_item_changed(const QModelIndex&)));
	connect(tree_view_, SIGNAL(activated(const QModelIndex&)),
		this, SLOT(on_item_activated(const QModelIndex&)));

	connect(this, SIGNAL(new_decoders_selected(vector<const srd_decoder*>)),
		&session, SLOT(on_new_decoders_selected(vector<const srd_decoder*>)));

	// Place the keyboard cursor in the filter QLineEdit initially
	filter->setFocus();
}

bool SubWindow::has_toolbar() const
{
	return true;
}

QToolBar* SubWindow::create_toolbar(QWidget *parent) const
{
	QToolBar* toolbar = new QToolBar(parent);

	return toolbar;
}

int SubWindow::minimum_width() const
{
	QFontMetrics m(info_label_body_->font());
	const int label_width = m.width(QString(tr(initial_notice)));

	return label_width + min_width_margin;
}

vector<const char*> SubWindow::get_decoder_inputs(const srd_decoder* d) const
{
	vector<const char*> ret_val;

	for (GSList* li = d->inputs; li; li = li->next)
		ret_val.push_back((const char*)li->data);

	return ret_val;
}

vector<const srd_decoder*> SubWindow::get_decoders_providing(const char* output) const
{
	vector<const srd_decoder*> ret_val;

	for (GSList* li = (GSList*)srd_decoder_list(); li; li = li->next) {
		const srd_decoder* d = (srd_decoder*)li->data;
		assert(d);

		if (!d->outputs)
			continue;

		const int maxlen = 1024;

		// TODO For now we ignore that d->outputs is actually a list
		if (strncmp((char*)(d->outputs->data), output, maxlen) == 0)
			ret_val.push_back(d);
	}

	return ret_val;
}

void SubWindow::on_item_changed(const QModelIndex& index)
{
	if (!index.isValid())
		return;

	QModelIndex id_index = index.model()->index(index.row(), 2, index.parent());
	QString decoder_name = index.model()->data(id_index, Qt::DisplayRole).toString();

	if (decoder_name.isEmpty())
		return;

	const srd_decoder* d = srd_decoder_get_by_id(decoder_name.toUtf8());

	const QString id = QString::fromUtf8(d->id);
	const QString longname = QString::fromUtf8(d->longname);
	const QString desc = QString::fromUtf8(d->desc);
	const QString doc = QString::fromUtf8(srd_decoder_doc_get(d)).trimmed();

	QString tags;
	for (GSList* li = (GSList*)d->tags; li; li = li->next) {
		QString s = (li == (GSList*)d->tags) ?
			tr((char*)li->data) :
			QString(tr(", %1")).arg(tr((char*)li->data));
		tags.append(s);
	}

	info_label_header_->setText(QString("<span style='font-size:large'><b>%1 (%2)</b></span><br><i>%3</i>")
		.arg(longname, id, desc));
	info_label_body_->setText(doc);
	info_label_footer_->setText(tr("<p align='right'>Tags: %1</p>").arg(tags));
}

void SubWindow::on_item_activated(const QModelIndex& index)
{
	if (!index.isValid())
		return;

	QModelIndex id_index = index.model()->index(index.row(), 2, index.parent());
	QString decoder_name = index.model()->data(id_index, Qt::DisplayRole).toString();

	const srd_decoder* chosen_decoder = srd_decoder_get_by_id(decoder_name.toUtf8());
	if (chosen_decoder == nullptr)
		return;

	vector<const srd_decoder*> decoders;
	decoders.push_back(chosen_decoder);

	// If the decoder only depends on logic inputs, we add it and are done
	vector<const char*> inputs = get_decoder_inputs(decoders.front());
	if (inputs.size() == 0) {
		qWarning() << "Protocol decoder" << decoder_name << "cannot have 0 inputs!";
		return;
	}

	if (strcmp(inputs.at(0), "logic") == 0) {
		new_decoders_selected(decoders);
		return;
	}

	// Check if we can automatically fulfill the stacking requirements
	while (strcmp(inputs.at(0), "logic") != 0) {
		vector<const srd_decoder*> prov_decoders = get_decoders_providing(inputs.at(0));

		if (prov_decoders.size() == 0) {
			// Emit warning and add the stack that we could gather so far
			qWarning() << "Protocol decoder" << QString::fromUtf8(decoders.back()->id) \
				<< "has input that no other decoder provides:" << QString::fromUtf8(inputs.at(0));
			break;
		}

		if (prov_decoders.size() == 1) {
			decoders.push_back(prov_decoders.front());
		} else {
			// Let user decide which one to use
			QString caption = QString(tr("Protocol decoder <b>%1</b> requires input type <b>%2</b> " \
				"which several decoders provide.<br>Choose which one to use:<br>"))
					.arg(QString::fromUtf8(decoders.back()->id), QString::fromUtf8(inputs.at(0)));

			QStringList items;
			for (const srd_decoder* d : prov_decoders)
				items << QString::fromUtf8(d->id) + " (" + QString::fromUtf8(d->longname) + ")";
			bool ok_clicked;
			QString item = QInputDialog::getItem(this, tr("Choose Decoder"),
				tr(caption.toUtf8()), items, 0, false, &ok_clicked);

			if ((!ok_clicked) || (item.isEmpty()))
				return;

			QString d = item.section(' ', 0, 0);
			decoders.push_back(srd_decoder_get_by_id(d.toUtf8()));
		}

		inputs = get_decoder_inputs(decoders.back());
	}

	// Reverse decoder list and add the stack
	reverse(decoders.begin(), decoders.end());
	new_decoders_selected(decoders);
}

void SubWindow::on_filter_changed(const QString& text)
{
	sort_filter_model_->setFilterFixedString(text);

	// Expand the "All Decoders" category/tag if the user filtered
	tree_view_->setExpanded(tree_view_->model()->index(0, 0), !text.isEmpty());
}

void SubWindow::on_filter_return_pressed()
{
	int num_visible_decoders = 0;
	QModelIndex last_valid_index;

	QModelIndex index = tree_view_->model()->index(0, 0);

	while (index.isValid()) {
		QModelIndex id_index = index.model()->index(index.row(), 2, index.parent());
		QString decoder_name = index.model()->data(id_index, Qt::DisplayRole).toString();
		if (!decoder_name.isEmpty()) {
			last_valid_index = index;
			num_visible_decoders++;
		}
		index = tree_view_->indexBelow(index);
	}

	// If only one decoder matches the filter, apply it when the user presses enter
	if (num_visible_decoders == 1)
		tree_view_->activated(last_valid_index);
}

} // namespace decoder_selector
} // namespace subwindows
} // namespace pv
Commit	Line	Data
97378470 SA	1	/*
	2	* This file is part of the PulseView project.
	3	*
	4	* Copyright (C) 2018 Soeren Apel <soeren@apelpie.net>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <algorithm>
	21
c52493c9	22	#include <QApplication>
97378470	23	#include <QDebug>
c52493c9	24	#include <QFontMetrics>
97378470 SA	25	#include <QInputDialog>
97378470 SA	26	#include <QLabel>
b229a1b7	27	#include <QLineEdit>
97378470	28	#include <QPushButton>
9c4ba1c1	29	#include <QScrollArea>
97378470 SA	30	#include <QVBoxLayout>
	31
	32	#include "pv/session.hpp"
	33	#include "pv/subwindows/decoder_selector/subwindow.hpp"
	34
	35	using std::reverse;
	36	using std::shared_ptr;
	37
	38	namespace pv {
	39	namespace subwindows {
	40	namespace decoder_selector {
	41
457555a8 SA	42	const char *initial_notice =
	43	QT_TRANSLATE_NOOP("pv::subwindows::decoder_selector::SubWindow", "Select a decoder to see its description here.");
	44
c52493c9 SA	45	const int min_width_margin = 75;
c52493c9 SA	46
97378470	47
b229a1b7 SA	48	bool QCustomSortFilterProxyModel::filterAcceptsRow(int source_row,
	49	const QModelIndex& source_parent) const
	50	{
	51	// Search model recursively
	52
	53	if (QSortFilterProxyModel::filterAcceptsRow(source_row, source_parent))
	54	return true;
	55
	56	const QModelIndex index = sourceModel()->index(source_row, 0, source_parent);
	57
	58	for (int i = 0; i < sourceModel()->rowCount(index); i++)
	59	if (filterAcceptsRow(i, index))
	60	return true;
	61
	62	return false;
	63	}
	64
	65
e10848e8 SA	66	void QCustomTreeView::currentChanged(const QModelIndex& current,
	67	const QModelIndex& previous)
	68	{
	69	QTreeView::currentChanged(current, previous);
	70	currentChanged(current);
	71	}
	72
	73
97378470 SA	74	SubWindow::SubWindow(Session& session, QWidget* parent) :
	75	SubWindowBase(session, parent),
	76	splitter_(new QSplitter()),
e10848e8	77	tree_view_(new QCustomTreeView()),
c2b80ad9 SA	78	info_box_(new QWidget()),
	79	info_label_header_(new QLabel()),
	80	info_label_body_(new QLabel()),
	81	info_label_footer_(new QLabel()),
a6fab024	82	model_(new DecoderCollectionModel()),
b229a1b7	83	sort_filter_model_(new QCustomSortFilterProxyModel())
97378470 SA	84	{
	85	QVBoxLayout* root_layout = new QVBoxLayout(this);
	86	root_layout->setContentsMargins(0, 0, 0, 0);
	87	root_layout->addWidget(splitter_);
	88
b229a1b7 SA	89	QWidget* upper_container = new QWidget();
	90	QVBoxLayout* upper_layout = new QVBoxLayout(upper_container);
	91	upper_layout->setContentsMargins(0, 5, 0, 0);
	92	QLineEdit* filter = new QLineEdit();
	93	upper_layout->addWidget(filter);
	94	upper_layout->addWidget(tree_view_);
	95
c2b80ad9	96	splitter_->setOrientation(Qt::Vertical);
b229a1b7	97	splitter_->addWidget(upper_container);
c2b80ad9	98	splitter_->addWidget(info_box_);
97378470	99
b229a1b7 SA	100	const QIcon filter_icon(QIcon::fromTheme("search",
	101	QIcon(":/icons/search.svg")));
	102	filter->setClearButtonEnabled(true);
	103	filter->addAction(filter_icon, QLineEdit::LeadingPosition);
	104
a6fab024	105	sort_filter_model_->setSourceModel(model_);
b229a1b7	106	sort_filter_model_->setFilterCaseSensitivity(Qt::CaseInsensitive);
b032da62	107	sort_filter_model_->setFilterKeyColumn(-1);
a6fab024 SA	108
a6fab024 SA	109	tree_view_->setModel(sort_filter_model_);
97378470	110	tree_view_->setRootIsDecorated(true);
a6fab024 SA	111	tree_view_->setSortingEnabled(true);
a6fab024 SA	112	tree_view_->sortByColumn(0, Qt::AscendingOrder);
97378470 SA	113
	114	// Hide the columns that hold the detailed item information
	115	tree_view_->hideColumn(2); // ID
	116
b54aeaea UH	117	// Ensure that all decoder tag names are fully visible by default
	118	tree_view_->resizeColumnToContents(0);
	119
5da32ad6 UH	120	tree_view_->setIndentation(10);
5da32ad6 UH	121
9c4ba1c1 SA	122	QScrollArea* info_label_body_container = new QScrollArea();
	123	info_label_body_container->setWidget(info_label_body_);
	124	info_label_body_container->setWidgetResizable(true);
	125
c2b80ad9 SA	126	info_box_->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
	127	QVBoxLayout* info_box_layout = new QVBoxLayout(info_box_);
	128	info_box_layout->addWidget(info_label_header_);
9c4ba1c1	129	info_box_layout->addWidget(info_label_body_container);
c2b80ad9	130	info_box_layout->addWidget(info_label_footer_);
a7961b36	131	info_box_layout->setAlignment(Qt::AlignTop);
0a7cdbf7	132	Qt::TextInteractionFlags flags = Qt::TextSelectableByMouse \| Qt::TextSelectableByKeyboard;
a8ea0620	133	info_label_header_->setWordWrap(true);
0a7cdbf7	134	info_label_header_->setTextInteractionFlags(flags);
c2b80ad9	135	info_label_body_->setWordWrap(true);
0a7cdbf7	136	info_label_body_->setTextInteractionFlags(flags);
457555a8	137	info_label_body_->setText(QString(tr(initial_notice)));
e0cfcb0e	138	info_label_body_->setAlignment(Qt::AlignTop);
a8ea0620	139	info_label_footer_->setWordWrap(true);
0a7cdbf7	140	info_label_footer_->setTextInteractionFlags(flags);
c2b80ad9	141
b229a1b7 SA	142	connect(filter, SIGNAL(textChanged(const QString&)),
b229a1b7 SA	143	this, SLOT(on_filter_changed(const QString&)));
66ab3d70 UH	144	connect(filter, SIGNAL(returnPressed()),
66ab3d70 UH	145	this, SLOT(on_filter_return_pressed()));
b229a1b7	146
e10848e8 SA	147	connect(tree_view_, SIGNAL(currentChanged(const QModelIndex&)),
	148	this, SLOT(on_item_changed(const QModelIndex&)));
	149	connect(tree_view_, SIGNAL(activated(const QModelIndex&)),
	150	this, SLOT(on_item_activated(const QModelIndex&)));
97378470 SA	151
	152	connect(this, SIGNAL(new_decoders_selected(vector<const srd_decoder*>)),
	153	&session, SLOT(on_new_decoders_selected(vector<const srd_decoder*>)));
39cc336a UH	154
	155	// Place the keyboard cursor in the filter QLineEdit initially
	156	filter->setFocus();
97378470 SA	157	}
	158
	159	bool SubWindow::has_toolbar() const
	160	{
	161	return true;
	162	}
	163
	164	QToolBar* SubWindow::create_toolbar(QWidget *parent) const
	165	{
	166	QToolBar* toolbar = new QToolBar(parent);
	167
	168	return toolbar;
	169	}
	170
c52493c9 SA	171	int SubWindow::minimum_width() const
	172	{
	173	QFontMetrics m(info_label_body_->font());
457555a8	174	const int label_width = m.width(QString(tr(initial_notice)));
c52493c9 SA	175
	176	return label_width + min_width_margin;
	177	}
	178
8f7c2dce	179	vector<const char> SubWindow::get_decoder_inputs(const srd_decoder d) const
97378470 SA	180	{
	181	vector<const char*> ret_val;
	182
486bcf01 SA	183	for (GSList* li = d->inputs; li; li = li->next)
486bcf01 SA	184	ret_val.push_back((const char*)li->data);
97378470 SA	185
	186	return ret_val;
	187	}
	188
8f7c2dce	189	vector<const srd_decoder> SubWindow::get_decoders_providing(const char output) const
97378470 SA	190	{
	191	vector<const srd_decoder*> ret_val;
	192
486bcf01	193	for (GSList* li = (GSList*)srd_decoder_list(); li; li = li->next) {
97378470 SA	194	const srd_decoder* d = (srd_decoder*)li->data;
	195	assert(d);
	196
	197	if (!d->outputs)
	198	continue;
	199
0e2ba0cc UH	200	const int maxlen = 1024;
0e2ba0cc UH	201
97378470	202	// TODO For now we ignore that d->outputs is actually a list
0e2ba0cc	203	if (strncmp((char*)(d->outputs->data), output, maxlen) == 0)
97378470 SA	204	ret_val.push_back(d);
97378470 SA	205	}
97378470 SA	206
	207	return ret_val;
	208	}
	209
e10848e8	210	void SubWindow::on_item_changed(const QModelIndex& index)
c2b80ad9 SA	211	{
	212	if (!index.isValid())
	213	return;
	214
	215	QModelIndex id_index = index.model()->index(index.row(), 2, index.parent());
	216	QString decoder_name = index.model()->data(id_index, Qt::DisplayRole).toString();
	217
	218	if (decoder_name.isEmpty())
	219	return;
	220
644462a7	221	const srd_decoder* d = srd_decoder_get_by_id(decoder_name.toUtf8());
c2b80ad9 SA	222
	223	const QString id = QString::fromUtf8(d->id);
	224	const QString longname = QString::fromUtf8(d->longname);
	225	const QString desc = QString::fromUtf8(d->desc);
9c4ba1c1	226	const QString doc = QString::fromUtf8(srd_decoder_doc_get(d)).trimmed();
c2b80ad9 SA	227
c2b80ad9 SA	228	QString tags;
486bcf01 SA	229	for (GSList* li = (GSList*)d->tags; li; li = li->next) {
486bcf01 SA	230	QString s = (li == (GSList*)d->tags) ?
c2b80ad9 SA	231	tr((char*)li->data) :
	232	QString(tr(", %1")).arg(tr((char*)li->data));
	233	tags.append(s);
	234	}
c2b80ad9	235
a51c7f7d	236	info_label_header_->setText(QString("<span style='font-size:large'><b>%1 (%2)</b></span><br><i>%3</i>")
c2b80ad9 SA	237	.arg(longname, id, desc));
	238	info_label_body_->setText(doc);
	239	info_label_footer_->setText(tr("<p align='right'>Tags: %1</p>").arg(tags));
	240	}
	241
e10848e8	242	void SubWindow::on_item_activated(const QModelIndex& index)
97378470 SA	243	{
	244	if (!index.isValid())
	245	return;
	246
	247	QModelIndex id_index = index.model()->index(index.row(), 2, index.parent());
	248	QString decoder_name = index.model()->data(id_index, Qt::DisplayRole).toString();
	249
644462a7	250	const srd_decoder* chosen_decoder = srd_decoder_get_by_id(decoder_name.toUtf8());
97378470 SA	251	if (chosen_decoder == nullptr)
	252	return;
	253
	254	vector<const srd_decoder*> decoders;
	255	decoders.push_back(chosen_decoder);
	256
	257	// If the decoder only depends on logic inputs, we add it and are done
8f7c2dce	258	vector<const char*> inputs = get_decoder_inputs(decoders.front());
97378470 SA	259	if (inputs.size() == 0) {
	260	qWarning() << "Protocol decoder" << decoder_name << "cannot have 0 inputs!";
	261	return;
	262	}
	263
0e2ba0cc	264	if (strcmp(inputs.at(0), "logic") == 0) {
97378470 SA	265	new_decoders_selected(decoders);
	266	return;
	267	}
	268
	269	// Check if we can automatically fulfill the stacking requirements
0e2ba0cc	270	while (strcmp(inputs.at(0), "logic") != 0) {
8f7c2dce	271	vector<const srd_decoder*> prov_decoders = get_decoders_providing(inputs.at(0));
97378470 SA	272
	273	if (prov_decoders.size() == 0) {
	274	// Emit warning and add the stack that we could gather so far
	275	qWarning() << "Protocol decoder" << QString::fromUtf8(decoders.back()->id) \
	276	<< "has input that no other decoder provides:" << QString::fromUtf8(inputs.at(0));
	277	break;
	278	}
	279
	280	if (prov_decoders.size() == 1) {
	281	decoders.push_back(prov_decoders.front());
	282	} else {
	283	// Let user decide which one to use
	284	QString caption = QString(tr("Protocol decoder <b>%1</b> requires input type <b>%2</b> " \
	285	"which several decoders provide.<br>Choose which one to use:<br>"))
	286	.arg(QString::fromUtf8(decoders.back()->id), QString::fromUtf8(inputs.at(0)));
	287
	288	QStringList items;
	289	for (const srd_decoder* d : prov_decoders)
	290	items << QString::fromUtf8(d->id) + " (" + QString::fromUtf8(d->longname) + ")";
	291	bool ok_clicked;
	292	QString item = QInputDialog::getItem(this, tr("Choose Decoder"),
	293	tr(caption.toUtf8()), items, 0, false, &ok_clicked);
	294
	295	if ((!ok_clicked) \|\| (item.isEmpty()))
	296	return;
	297
	298	QString d = item.section(' ', 0, 0);
644462a7	299	decoders.push_back(srd_decoder_get_by_id(d.toUtf8()));
97378470 SA	300	}
97378470 SA	301
8f7c2dce	302	inputs = get_decoder_inputs(decoders.back());
97378470 SA	303	}
	304
	305	// Reverse decoder list and add the stack
	306	reverse(decoders.begin(), decoders.end());
	307	new_decoders_selected(decoders);
	308	}
	309
b229a1b7 SA	310	void SubWindow::on_filter_changed(const QString& text)
	311	{
	312	sort_filter_model_->setFilterFixedString(text);
8c9e323b UH	313
	314	// Expand the "All Decoders" category/tag if the user filtered
	315	tree_view_->setExpanded(tree_view_->model()->index(0, 0), !text.isEmpty());
b229a1b7 SA	316	}
b229a1b7 SA	317
66ab3d70 UH	318	void SubWindow::on_filter_return_pressed()
	319	{
	320	int num_visible_decoders = 0;
	321	QModelIndex last_valid_index;
	322
	323	QModelIndex index = tree_view_->model()->index(0, 0);
	324
	325	while (index.isValid()) {
	326	QModelIndex id_index = index.model()->index(index.row(), 2, index.parent());
	327	QString decoder_name = index.model()->data(id_index, Qt::DisplayRole).toString();
	328	if (!decoder_name.isEmpty()) {
	329	last_valid_index = index;
	330	num_visible_decoders++;
	331	}
	332	index = tree_view_->indexBelow(index);
	333	}
	334
	335	// If only one decoder matches the filter, apply it when the user presses enter
	336	if (num_visible_decoders == 1)
	337	tree_view_->activated(last_valid_index);
	338	}
	339
97378470 SA	340	} // namespace decoder_selector
	341	} // namespace subwindows
	342	} // namespace pv