Cabana: sort signal by start bit and keep cursor position after save (#26529)

sort signals by start bit and keep cursor position after save
old-commit-hash: e3c913bfa1

tools/cabana/binaryview.cc

@@ -166,19 +166,19 @@ void BinaryViewModel::setMessage(const QString &message_id) {
     row_count = dbc_msg->size;
     items.resize(row_count * column_count);
     int i = 0;
-    for (auto &[name, sig] : dbc_msg->sigs) {
-      auto [start, end] = getSignalRange(&sig);
+    for (auto sig : dbc_msg->getSignals()) {
+      auto [start, end] = getSignalRange(sig);
       for (int j = start; j <= end; ++j) {
-        int bit_index = sig.is_little_endian ? bigEndianBitIndex(j) : j;
+        int bit_index = sig->is_little_endian ? bigEndianBitIndex(j) : j;
         int idx = column_count * (bit_index / 8) + bit_index % 8;
         if (idx >= items.size()) {
-          qWarning() << "signal " << name << "out of bounds.start_bit:" << sig.start_bit << "size:" << sig.size;
+          qWarning() << "signal " << sig->name.c_str() << "out of bounds.start_bit:" << sig->start_bit << "size:" << sig->size;
           break;
         }
-        if (j == start) sig.is_little_endian ? items[idx].is_lsb = true : items[idx].is_msb = true;
-        if (j == end) sig.is_little_endian ? items[idx].is_msb = true : items[idx].is_lsb = true;
+        if (j == start) sig->is_little_endian ? items[idx].is_lsb = true : items[idx].is_msb = true;
+        if (j == end) sig->is_little_endian ? items[idx].is_msb = true : items[idx].is_lsb = true;
         items[idx].bg_color = getColor(i);
-        items[idx].sigs.push_back(&sig);
+        items[idx].sigs.push_back(sig);
       }
       ++i;
     }

tools/cabana/dbcmanager.cc

@@ -107,6 +107,15 @@ DBCManager *dbc() {
   return &dbc_manager;
 }
 
+// DBCMsg
+
+std::vector<const Signal*> DBCMsg::getSignals() const {
+  std::vector<const Signal*> ret;
+  for (auto &[name, sig] : sigs) ret.push_back(&sig);
+  std::sort(ret.begin(), ret.end(), [](auto l, auto r) { return l->start_bit < r->start_bit; });
+  return ret;
+}
+
 // helper functions
 
 static QVector<int> BIG_ENDIAN_START_BITS = []() {

tools/cabana/dbcmanager.h

@@ -9,6 +9,7 @@ struct DBCMsg {
   QString name;
   uint32_t size;
   std::map<QString, Signal> sigs;
+  std::vector<const Signal*> getSignals() const;
 };
 
 class DBCManager : public QObject {

tools/cabana/detailwidget.cc

@@ -149,7 +149,7 @@ void DetailWidget::dbcMsgChanged(int show_form_idx) {
   QStringList warnings;
   const DBCMsg *msg = dbc()->msg(msg_id);
   if (msg) {
-    for (auto &[name, sig] : msg->sigs) {
+    for (auto sig : msg->getSignals()) {
       SignalEdit *form = i < signal_list.size() ? signal_list[i] : nullptr;
       if (!form) {
         form = new SignalEdit(i);
@@ -162,8 +162,8 @@ void DetailWidget::dbcMsgChanged(int show_form_idx) {
         signals_layout->addWidget(form);
         signal_list.push_back(form);
       }
-      form->setSignal(msg_id, &sig);
-      form->setChartOpened(charts->isChartOpened(msg_id, &sig));
+      form->setSignal(msg_id, sig);
+      form->setChartOpened(charts->isChartOpened(msg_id, sig));
       ++i;
     }
     if (msg->size != can->lastMessage(msg_id).dat.size())

tools/cabana/signaledit.cc

@@ -116,11 +116,16 @@ SignalEdit::SignalEdit(int index, QWidget *parent) : form_idx(index), QWidget(pa
   hline->setFrameShadow(QFrame::Sunken);
   main_layout->addWidget(hline);
 
+  save_timer = new QTimer(this);
+  save_timer->setInterval(300);
+  save_timer->setSingleShot(true);
+  save_timer->callOnTimeout(this, &SignalEdit::saveSignal);
+
   QObject::connect(title, &ElidedLabel::clicked, this, &SignalEdit::showFormClicked);
   QObject::connect(plot_btn, &QToolButton::clicked, [this](bool checked) { emit showChart(msg_id, sig, checked); });
   QObject::connect(seek_btn, &QToolButton::clicked, [this]() { SignalFindDlg(msg_id, sig, this).exec(); });
   QObject::connect(remove_btn, &QToolButton::clicked,  [this]() { emit remove(sig); });
-  QObject::connect(form, &SignalForm::changed, this, &SignalEdit::saveSignal);
+  QObject::connect(form, &SignalForm::changed, [this]() { save_timer->start(); });
   setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 }
 
@@ -174,7 +179,9 @@ void SignalEdit::setChartOpened(bool opened) {
 void SignalEdit::updateForm(bool visible) {
   if (visible && sig) {
     form->changed_by_user = false;
-    form->name->setText(sig->name.c_str());
+    if (form->name->text() != sig->name.c_str()) {
+      form->name->setText(sig->name.c_str());
+    }
     form->endianness->setCurrentIndex(sig->is_little_endian ? 0 : 1);
     form->sign->setCurrentIndex(sig->is_signed ? 0 : 1);
     form->factor->setText(QString::number(sig->factor));

tools/cabana/signaledit.h

@@ -5,6 +5,7 @@
 #include <QLabel>
 #include <QLineEdit>
 #include <QSpinBox>
+#include <QTimer>
 #include <QToolButton>
 
 #include "selfdrive/ui/qt/widgets/controls.h"
@@ -57,6 +58,7 @@ protected:
   QLabel *icon;
   int form_idx = 0;
   QToolButton *plot_btn;
+  QTimer *save_timer;
 };
 
 class SignalFindDlg : public QDialog {