From: Soeren Apel <redacted>
Date: Thu, 6 Feb 2020 19:15:35 +0000 (+0100)
Subject: DecodeTrace: Prevent user from hiding the only row
X-Git-Url: http://sigrok.org/gitweb/?p=pulseview.git;a=commitdiff_plain;h=9eaa8343da2ee7bb0d7397547ca250a528ccde5a

DecodeTrace: Prevent user from hiding the only row
---

diff --git a/pv/views/trace/decodetrace.cpp b/pv/views/trace/decodetrace.cpp
index 8ca8d580..f4b9f335 100644
--- a/pv/views/trace/decodetrace.cpp
+++ b/pv/views/trace/decodetrace.cpp
@@ -1316,6 +1316,7 @@ void DecodeTrace::initialize_row_widgets(DecodeTraceRow* r, unsigned int row_id)
 
 	// Add widgets inside the header container
 	QCheckBox* cb = new QCheckBox();
+	r->row_visibility_checkbox = cb;
 	header_container_layout->addWidget(cb);
 	cb->setText(tr("Show this row"));
 	cb->setChecked(r->decode_row->visible());
@@ -1426,6 +1427,10 @@ void DecodeTrace::update_rows()
 		row_id++;
 	}
 
+	// If there's only one row, it must not be hidden or else it can't be un-hidden
+	if (row_id == 1)
+		rows_.front().row_visibility_checkbox->setEnabled(false);
+
 	// Remove any rows that no longer exist, obeying that iterators are invalidated
 	bool any_exists;
 	do {
@@ -1433,6 +1438,8 @@ void DecodeTrace::update_rows()
 
 		for (unsigned int i = 0; i < rows_.size(); i++)
 			if (!rows_[i].exists) {
+				delete rows_[i].row_visibility_checkbox;
+
 				for (QCheckBox* cb : rows_[i].selectors)
 					delete cb;
 
diff --git a/pv/views/trace/decodetrace.hpp b/pv/views/trace/decodetrace.hpp
index b6791c43..215ae0ae 100644
--- a/pv/views/trace/decodetrace.hpp
+++ b/pv/views/trace/decodetrace.hpp
@@ -97,6 +97,7 @@ struct DecodeTraceRow {
 	ContainerWidget* container;
 	QWidget* header_container;
 	QWidget* selector_container;
+	QCheckBox* row_visibility_checkbox;
 	vector<QCheckBox*> selectors;
 
 	QColor row_color;