From: Soeren Apel <redacted>
Date: Mon, 24 Aug 2015 10:32:11 +0000 (+0200)
Subject: Fix #510 by disabling removal of the last decoder from the popup
X-Git-Tag: pulseview-0.3.0~135
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=ff59fa2c05db46e78c7fd0240223664fe0b2ad9b;p=pulseview.git

Fix #510 by disabling removal of the last decoder from the popup
---

diff --git a/pv/view/decodetrace.cpp b/pv/view/decodetrace.cpp
index 36e7a104..7bb62b2b 100644
--- a/pv/view/decodetrace.cpp
+++ b/pv/view/decodetrace.cpp
@@ -642,13 +642,17 @@ void DecodeTrace::create_decoder_form(int index,
 	const srd_decoder *const decoder = dec->decoder();
 	assert(decoder);
 
+	const bool decoder_deletable = index > 0;
+
 	pv::widgets::DecoderGroupBox *const group =
 		new pv::widgets::DecoderGroupBox(
-			QString::fromUtf8(decoder->name));
+			QString::fromUtf8(decoder->name), nullptr, decoder_deletable);
 	group->set_decoder_visible(dec->shown());
 
-	delete_mapper_.setMapping(group, index);
-	connect(group, SIGNAL(delete_decoder()), &delete_mapper_, SLOT(map()));
+	if (decoder_deletable) {
+		delete_mapper_.setMapping(group, index);
+		connect(group, SIGNAL(delete_decoder()), &delete_mapper_, SLOT(map()));
+	}
 
 	show_hide_mapper_.setMapping(group, index);
 	connect(group, SIGNAL(show_hide_decoder()),
diff --git a/pv/widgets/decodergroupbox.cpp b/pv/widgets/decodergroupbox.cpp
index 7127ba13..81e5e902 100644
--- a/pv/widgets/decodergroupbox.cpp
+++ b/pv/widgets/decodergroupbox.cpp
@@ -30,7 +30,7 @@
 namespace pv {
 namespace widgets {
 
-DecoderGroupBox::DecoderGroupBox(QString title, QWidget *parent) :
+DecoderGroupBox::DecoderGroupBox(QString title, QWidget *parent, bool isDeletable) :
 	QWidget(parent),
 	layout_(new QGridLayout),
 	show_hide_button_(QIcon(":/icons/decoder-shown.svg"), QString(), this)
@@ -51,13 +51,15 @@ DecoderGroupBox::DecoderGroupBox(QString title, QWidget *parent) :
 		this, SIGNAL(show_hide_decoder()));
 	toolbar->addWidget(&show_hide_button_);
 
-	QPushButton *const delete_button = new QPushButton(
-		QIcon(":/icons/decoder-delete.svg"), QString(), this);
-	delete_button->setFlat(true);
-	delete_button->setIconSize(QSize(16, 16));
-	connect(delete_button, SIGNAL(clicked()),
-		this, SIGNAL(delete_decoder()));
-	toolbar->addWidget(delete_button);
+	if (isDeletable) {
+		QPushButton *const delete_button = new QPushButton(
+			QIcon(":/icons/decoder-delete.svg"), QString(), this);
+		delete_button->setFlat(true);
+		delete_button->setIconSize(QSize(16, 16));
+		connect(delete_button, SIGNAL(clicked()),
+			this, SIGNAL(delete_decoder()));
+		toolbar->addWidget(delete_button);
+	}
 }
 
 void DecoderGroupBox::add_layout(QLayout *layout)
diff --git a/pv/widgets/decodergroupbox.hpp b/pv/widgets/decodergroupbox.hpp
index 73bc9971..75544318 100644
--- a/pv/widgets/decodergroupbox.hpp
+++ b/pv/widgets/decodergroupbox.hpp
@@ -34,7 +34,8 @@ class DecoderGroupBox : public QWidget
 	Q_OBJECT
 
 public:
-	DecoderGroupBox(QString title, QWidget *parent = nullptr);
+	DecoderGroupBox(QString title, QWidget *parent = nullptr,
+		bool isDeletable = true);
 
 	void add_layout(QLayout *layout);